Southwest Airlines flight WN 1645: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Tue,Wed,Sun 06:05 Louisville (SDF) 08:10 Orlando (MCO)
WN 1645 Non-stop Boeing 737-700 (73W) 2:05 Effective 2025-06-08 through 2025-08-03
Tue,Wed 06:15 San Antonio (SAT) A 07:30 Denver (DEN)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 2:15 Effective 2025-08-05 through 2025-10-01
Mon,Thu,Fri,Sun 06:50 Harlingen (HRL) 08:05 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-11-02 through 2025-11-16
Mon,Fri,Sun 06:50 Harlingen (HRL) 08:05 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-11-21 through 2025-11-28
Fri,Sun 06:50 Harlingen (HRL) 08:05 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-12-07 through 2025-12-14
Thu 06:50 Harlingen (HRL) 08:05 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Operates only on 2025-12-18
Mon 06:50 Harlingen (HRL) 08:05 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Operates only on 2026-01-05
Sat 07:05 Harlingen (HRL) 08:20 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-11-08 through 2025-11-15
Sun 07:05 Harlingen (HRL) 08:20 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Operates only on 2025-11-30
Sat 07:05 Harlingen (HRL) 08:20 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-12-06 through 2025-12-13
Sun 08:05 Nashville (BNA) 10:30 San Antonio (SAT) A
WN 1645 Non-stop Boeing 737-700 (73W) 2:25 Effective 2025-08-10 through 2025-08-24
Sun 08:05 Nashville (BNA) 10:30 San Antonio (SAT) A
WN 1645 Non-stop Boeing 737-700 (73W) 2:25 Effective 2025-09-07 through 2025-09-28
Mon-Wed 08:15 Baltimore (BWI) 10:20 Denver (DEN)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 4:05 Effective 2025-11-25 through 2025-12-01
Mon,Tue,Fri,Sun 08:15 Baltimore (BWI) 10:20 Denver (DEN)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 4:05 Effective 2025-12-19 through 2026-01-04
Fri 08:20 Nashville (BNA) 09:35 Jackson (JAN)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 1:15 Operates only on 2025-07-04
Sat 08:25 Baltimore (BWI) 10:35 Denver (DEN)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 4:10 Effective 2025-11-22 through 2025-11-29
Sat 08:25 Baltimore (BWI) 10:35 Denver (DEN)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 4:10 Effective 2025-12-20 through 2026-01-03
Mon,Thu,Fri,Sun 08:50 Austin (AUS) 10:15 New Orleans (MSY)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2025-11-02 through 2025-11-16
Mon,Fri,Sun 08:50 Austin (AUS) 10:15 New Orleans (MSY)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2025-11-21 through 2025-11-28
Fri,Sun 08:50 Austin (AUS) 10:15 New Orleans (MSY)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Effective 2025-12-07 through 2025-12-14
Thu 08:50 Austin (AUS) 10:15 New Orleans (MSY)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Operates only on 2025-12-18
Mon 08:50 Austin (AUS) 10:15 New Orleans (MSY)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:25 Operates only on 2026-01-05
Sun 09:00 Austin (AUS) 10:20 Denver (DEN)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 2:20 Operates only on 2025-11-30
Mon,Thu,Fri 09:40 Burbank (BUR) 15:15 Saint Louis (STL) 2
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 3:35 Effective 2025-10-02 through 2025-10-31
Mon,Thu,Fri 11:05 San Antonio (SAT) A 12:15 Denver (DEN)
WN 1645 Non-stop Boeing 737-800 (73H) 2:10 Effective 2025-08-07 through 2025-09-29
Sun 11:05 San Antonio (SAT) A 12:15 Denver (DEN)
WN 1645 Non-stop Boeing 737-700 (73W) 2:10 Effective 2025-08-10 through 2025-08-24
Sun 11:05 San Antonio (SAT) A 12:15 Denver (DEN)
WN 1645 Non-stop Boeing 737-700 (73W) 2:10 Effective 2025-09-07 through 2025-09-28
Thu 11:05 Honolulu (HNL) 2 11:55 Kahului (OGG)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 0:50 Operates only on 2025-11-27
Tue,Wed 11:10 Burbank (BUR) 16:45 Saint Louis (STL) 2
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 3:35 Effective 2025-10-07 through 2025-10-29
Sat 11:15 Louisville (SDF) 13:20 Orlando (MCO)
WN 1645 Non-stop Boeing 737-700 (73W) 2:05 Effective 2025-06-07 through 2025-08-02
Sat 12:50 San Antonio (SAT) A 14:00 Denver (DEN)
WN 1645 Non-stop Boeing 737-800 (73H) 2:10 Effective 2025-08-09 through 2025-09-27
Mon,Thu,Fri 15:50 Saint Louis (STL) 2 17:30 Pensacola (PNS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:40 Effective 2025-10-02 through 2025-10-31
Tue,Wed 17:10 Midway, Chicago (MDW) 21:05 Miami (MIA)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Valid until 2025-06-04
Tue,Wed 17:40 Harlingen (HRL) 18:55 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-11-04 through 2025-11-12
Mon-Thu 17:40 Harlingen (HRL) 18:55 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-11-17 through 2025-11-20
Mon-Fri 17:40 Harlingen (HRL) 18:55 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-12-02 through 2025-12-11
Mon-Wed 17:40 Harlingen (HRL) 18:55 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-12-15 through 2025-12-17
Wed,Thu 17:40 Harlingen (HRL) 18:55 Austin (AUS)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:15 Effective 2025-12-24 through 2026-01-01
Mon,Thu,Fri 18:05 Pensacola (PNS) 19:50 Houston Hobby (HOU)
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:45 Effective 2025-10-02 through 2025-10-31
Mon,Thu,Fri 18:35 Midway, Chicago (MDW) 22:30 Miami (MIA)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Valid until 2025-06-02
Sat 18:45 Midway, Chicago (MDW) 22:40 Miami (MIA)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Valid until 2025-05-31
Tue,Wed 19:30 Austin (AUS) 20:35 Love Field, Dallas (DAL) 1
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:05 Effective 2025-11-04 through 2025-11-12
Mon-Thu 19:30 Austin (AUS) 20:35 Love Field, Dallas (DAL) 1
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:05 Effective 2025-11-17 through 2025-11-20
Mon-Fri 19:30 Austin (AUS) 20:35 Love Field, Dallas (DAL) 1
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:05 Effective 2025-12-02 through 2025-12-11
Mon-Wed 19:30 Austin (AUS) 20:35 Love Field, Dallas (DAL) 1
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:05 Effective 2025-12-15 through 2025-12-17
Wed,Thu 19:30 Austin (AUS) 20:35 Love Field, Dallas (DAL) 1
WN 1645 Non-stop Boeing 737-700 (Scimitar Winglets) 1:05 Effective 2025-12-24 through 2026-01-01
Sun 20:40 Midway, Chicago (MDW) 00:40 Miami (MIA)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Valid until 2025-05-18
The flight arrives 1 day after departure.
Sun 20:40 Midway, Chicago (MDW) 00:40 Miami (MIA)
WN 1645 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Operates only on 2025-06-01
The flight arrives 1 day after departure.
Non-Direct Flights:
Mon,Thu,Fri,Sun 06:50 Harlingen (HRL) 10:15 New Orleans (MSY)
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 3:25 Effective 2025-11-02 through 2025-11-16
Mon,Fri,Sun 06:50 Harlingen (HRL) 10:15 New Orleans (MSY)
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 3:25 Effective 2025-11-21 through 2025-11-28
Fri,Sun 06:50 Harlingen (HRL) 10:15 New Orleans (MSY)
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 3:25 Effective 2025-12-07 through 2025-12-14
Thu 06:50 Harlingen (HRL) 10:15 New Orleans (MSY)
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 3:25 Operates only on 2025-12-18
Mon 06:50 Harlingen (HRL) 10:15 New Orleans (MSY)
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 3:25 Operates only on 2026-01-05
Sun 07:05 Harlingen (HRL) 10:20 Denver (DEN)
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 4:15 Operates only on 2025-11-30
Sun 08:05 Nashville (BNA) 12:15 Denver (DEN)
WN 1645 1-stop Boeing 737-700 (73W) 5:10 Effective 2025-08-10 through 2025-08-24
Sun 08:05 Nashville (BNA) 12:15 Denver (DEN)
WN 1645 1-stop Boeing 737-700 (73W) 5:10 Effective 2025-09-07 through 2025-09-28
Mon,Thu,Fri 09:40 Burbank (BUR) 17:30 Pensacola (PNS)
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 5:50 Effective 2025-10-02 through 2025-10-31
Mon,Thu,Fri 15:50 Saint Louis (STL) 2 19:50 Houston Hobby (HOU)
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 4:00 Effective 2025-10-02 through 2025-10-31
Tue,Wed 17:40 Harlingen (HRL) 20:35 Love Field, Dallas (DAL) 1
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 2:55 Effective 2025-11-04 through 2025-11-12
Mon-Thu 17:40 Harlingen (HRL) 20:35 Love Field, Dallas (DAL) 1
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 2:55 Effective 2025-11-17 through 2025-11-20
Mon-Fri 17:40 Harlingen (HRL) 20:35 Love Field, Dallas (DAL) 1
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 2:55 Effective 2025-12-02 through 2025-12-11
Mon-Wed 17:40 Harlingen (HRL) 20:35 Love Field, Dallas (DAL) 1
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 2:55 Effective 2025-12-15 through 2025-12-17
Wed,Thu 17:40 Harlingen (HRL) 20:35 Love Field, Dallas (DAL) 1
WN 1645 1-stop Boeing 737-700 (Scimitar Winglets) 2:55 Effective 2025-12-24 through 2026-01-01
Mon,Thu,Fri 09:40 Burbank (BUR) 19:50 Houston Hobby (HOU)
WN 1645 2-stop Boeing 737-700 (Scimitar Winglets) 8:10 Effective 2025-10-02 through 2025-10-31
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Southwest Airlines flight WN 1645: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN1645
06:05
Louisville (SDF)

08:10
Orlando (MCO)
Effective 2025-06-08 through 2025-08-03
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:05, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN1645
06:15
San Antonio (SAT) A

07:30
Denver (DEN)
Effective 2025-08-05 through 2025-10-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:15, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1645
06:50
Harlingen (HRL)

08:05
Austin (AUS)
Effective 2025-11-02 through 2025-11-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
06:50
Harlingen (HRL)

08:05
Austin (AUS)
Effective 2025-11-21 through 2025-11-28
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
06:50
Harlingen (HRL)

08:05
Austin (AUS)
Effective 2025-12-07 through 2025-12-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
06:50
Harlingen (HRL)

08:05
Austin (AUS)
Operates only on 2025-12-18
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
06:50
Harlingen (HRL)

08:05
Austin (AUS)
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
07:05
Harlingen (HRL)

08:20
Austin (AUS)
Effective 2025-11-08 through 2025-11-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
07:05
Harlingen (HRL)

08:20
Austin (AUS)
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
07:05
Harlingen (HRL)

08:20
Austin (AUS)
Effective 2025-12-06 through 2025-12-13
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
08:05
Nashville (BNA)

10:30
San Antonio (SAT) A
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN1645
08:05
Nashville (BNA)

10:30
San Antonio (SAT) A
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:25, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN1645
08:15
Baltimore (BWI)

10:20
Denver (DEN)
Effective 2025-11-25 through 2025-12-01
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:05, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1645
08:15
Baltimore (BWI)

10:20
Denver (DEN)
Effective 2025-12-19 through 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 4:05, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1645
08:20
Nashville (BNA)

09:35
Jackson (JAN)
Operates only on 2025-07-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1645
08:25
Baltimore (BWI)

10:35
Denver (DEN)
Effective 2025-11-22 through 2025-11-29
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:10, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1645
08:25
Baltimore (BWI)

10:35
Denver (DEN)
Effective 2025-12-20 through 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:10, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1645
08:50
Austin (AUS)

10:15
New Orleans (MSY)
Effective 2025-11-02 through 2025-11-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
08:50
Austin (AUS)

10:15
New Orleans (MSY)
Effective 2025-11-21 through 2025-11-28
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
08:50
Austin (AUS)

10:15
New Orleans (MSY)
Effective 2025-12-07 through 2025-12-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
08:50
Austin (AUS)

10:15
New Orleans (MSY)
Operates only on 2025-12-18
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
08:50
Austin (AUS)

10:15
New Orleans (MSY)
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:25, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
09:00
Austin (AUS)

10:20
Denver (DEN)
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:20, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
09:40
Burbank (BUR)

15:15
Saint Louis (STL) 2
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 3:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
11:05
San Antonio (SAT) A

12:15
Denver (DEN)
Effective 2025-08-07 through 2025-09-29
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:10, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN1645
11:05
San Antonio (SAT) A

12:15
Denver (DEN)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:10, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN1645
11:05
San Antonio (SAT) A

12:15
Denver (DEN)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:10, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN1645
11:05
Honolulu (HNL) 2

11:55
Kahului (OGG)
Operates only on 2025-11-27
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 0:50, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1645
11:10
Burbank (BUR)

16:45
Saint Louis (STL) 2
Effective 2025-10-07 through 2025-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:35, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
11:15
Louisville (SDF)

13:20
Orlando (MCO)
Effective 2025-06-07 through 2025-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:05, non-stop
Boeing 737-700 (73W)
Southwest Airlines WN1645
12:50
San Antonio (SAT) A

14:00
Denver (DEN)
Effective 2025-08-09 through 2025-09-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:10, non-stop
Boeing 737-800 (73H)
Southwest Airlines WN1645
15:50
Saint Louis (STL) 2

17:30
Pensacola (PNS)
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:40, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
17:10
Midway, Chicago (MDW)

21:05
Miami (MIA)
Valid until 2025-06-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1645
17:40
Harlingen (HRL)

18:55
Austin (AUS)
Effective 2025-11-04 through 2025-11-12
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
17:40
Harlingen (HRL)

18:55
Austin (AUS)
Effective 2025-11-17 through 2025-11-20
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
17:40
Harlingen (HRL)

18:55
Austin (AUS)
Effective 2025-12-02 through 2025-12-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
17:40
Harlingen (HRL)

18:55
Austin (AUS)
Effective 2025-12-15 through 2025-12-17
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
17:40
Harlingen (HRL)

18:55
Austin (AUS)
Effective 2025-12-24 through 2026-01-01
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
18:05
Pensacola (PNS)

19:50
Houston Hobby (HOU)
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
18:35
Midway, Chicago (MDW)

22:30
Miami (MIA)
Valid until 2025-06-02
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1645
18:45
Midway, Chicago (MDW)

22:40
Miami (MIA)
Valid until 2025-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)
Southwest Airlines WN1645
19:30
Austin (AUS)

20:35
Love Field, Dallas (DAL) 1
Effective 2025-11-04 through 2025-11-12
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
19:30
Austin (AUS)

20:35
Love Field, Dallas (DAL) 1
Effective 2025-11-17 through 2025-11-20
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
19:30
Austin (AUS)

20:35
Love Field, Dallas (DAL) 1
Effective 2025-12-02 through 2025-12-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 1:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
19:30
Austin (AUS)

20:35
Love Field, Dallas (DAL) 1
Effective 2025-12-15 through 2025-12-17
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
19:30
Austin (AUS)

20:35
Love Field, Dallas (DAL) 1
Effective 2025-12-24 through 2026-01-01
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:05, non-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
20:40
Midway, Chicago (MDW)

00:40(+1)
Miami (MIA)
Valid until 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Southwest Airlines WN1645
20:40
Midway, Chicago (MDW)

00:40(+1)
Miami (MIA)
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Non-Direct Flights:
Southwest Airlines WN1645
06:50
Harlingen (HRL)

10:15
New Orleans (MSY)
Effective 2025-11-02 through 2025-11-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 3:25, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
06:50
Harlingen (HRL)

10:15
New Orleans (MSY)
Effective 2025-11-21 through 2025-11-28
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 3:25, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
06:50
Harlingen (HRL)

10:15
New Orleans (MSY)
Effective 2025-12-07 through 2025-12-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 3:25, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
06:50
Harlingen (HRL)

10:15
New Orleans (MSY)
Operates only on 2025-12-18
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 3:25, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
06:50
Harlingen (HRL)

10:15
New Orleans (MSY)
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:25, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
07:05
Harlingen (HRL)

10:20
Denver (DEN)
Operates only on 2025-11-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:15, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
08:05
Nashville (BNA)

12:15
Denver (DEN)
Effective 2025-08-10 through 2025-08-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:10, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN1645
08:05
Nashville (BNA)

12:15
Denver (DEN)
Effective 2025-09-07 through 2025-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:10, 1-stop
Boeing 737-700 (73W)
Southwest Airlines WN1645
09:40
Burbank (BUR)

17:30
Pensacola (PNS)
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 5:50, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
15:50
Saint Louis (STL) 2

19:50
Houston Hobby (HOU)
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 4:00, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
17:40
Harlingen (HRL)

20:35
Love Field, Dallas (DAL) 1
Effective 2025-11-04 through 2025-11-12
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:55, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
17:40
Harlingen (HRL)

20:35
Love Field, Dallas (DAL) 1
Effective 2025-11-17 through 2025-11-20
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:55, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
17:40
Harlingen (HRL)

20:35
Love Field, Dallas (DAL) 1
Effective 2025-12-02 through 2025-12-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:55, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
17:40
Harlingen (HRL)

20:35
Love Field, Dallas (DAL) 1
Effective 2025-12-15 through 2025-12-17
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:55, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
17:40
Harlingen (HRL)

20:35
Love Field, Dallas (DAL) 1
Effective 2025-12-24 through 2026-01-01
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:55, 1-stop
Boeing 737-700 (Scimitar Winglets)
Southwest Airlines WN1645
09:40
Burbank (BUR)

19:50
Houston Hobby (HOU)
Effective 2025-10-02 through 2025-10-31
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 8:10, 2-stop
Boeing 737-700 (Scimitar Winglets)
Ad mobi box here (300x250px) 8888825773 M FlightWNum Bottom Box
Parallax here
This flight number is listed as serving the following routes:
  • Austin (AUS) - Denver (DEN)
  • Austin (AUS) - Love Field, Dallas (DAL)
  • Austin (AUS) - New Orleans (MSY)
  • Baltimore (BWI) - Denver (DEN)
  • Burbank (BUR) - Houston Hobby (HOU)
  • Burbank (BUR) - Pensacola (PNS)
  • Burbank (BUR) - Saint Louis (STL)
  • Harlingen (HRL) - Austin (AUS)
  • Harlingen (HRL) - Denver (DEN)
  • Harlingen (HRL) - Love Field, Dallas (DAL)
  • Harlingen (HRL) - New Orleans (MSY)
  • Honolulu (HNL) - Kahului (OGG)
  • Louisville (SDF) - Orlando (MCO)
  • Midway, Chicago (MDW) - Miami (MIA)
  • Nashville (BNA) - Denver (DEN)
  • Nashville (BNA) - Jackson (JAN)
  • Nashville (BNA) - San Antonio (SAT)
  • Pensacola (PNS) - Houston Hobby (HOU)
  • Saint Louis (STL) - Houston Hobby (HOU)
  • Saint Louis (STL) - Pensacola (PNS)
  • San Antonio (SAT) - Denver (DEN)
All Southwest Airlines flights
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