KLM flight KL 6377: Multiple routes

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FLIGHT SCHEDULE
Direct Codeshare Flights:
Mon-Fri,Sun 13:48 Atlanta (ATL) S 15:27 Pittsburgh (PIT)
KL 6377 Non-stop Boeing 737-900 (739) 1:39 Effective 2025-06-08 through 2025-06-30
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Mon-Fri,Sun 13:50 Atlanta (ATL) S 15:25 Pittsburgh (PIT)
KL 6377 Non-stop Boeing 737-900 (739) 1:35 Effective 2025-05-23 through 2025-06-06
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Sat 13:53 Atlanta (ATL) S 15:25 Pittsburgh (PIT)
KL 6377 Non-stop Boeing 737-900 (739) 1:32 Effective 2025-05-24 through 2025-06-07
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Sat 13:58 Atlanta (ATL) S 15:37 Pittsburgh (PIT)
KL 6377 Non-stop Boeing 737-900 (739) 1:39 Effective 2025-06-14 through 2025-07-05
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Daily 14:00 Atlanta (ATL) S 15:42 Pittsburgh (PIT)
KL 6377 Non-stop Boeing 737-900 (739) 1:42 Effective 2025-07-07 through 2025-09-07
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Daily 14:00 Atlanta (ATL) S 15:38 Pittsburgh (PIT)
KL 6377 Non-stop Boeing 737-900 (739) 1:38 Effective 2025-09-08 through 2025-09-30
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Mon,Thu-Sun 14:10 Atlanta (ATL) S 15:45 Pittsburgh (PIT)
KL 6377 Non-stop Boeing 737-900 (739) 1:35 Valid until 2025-05-05
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Daily 16:30 Pittsburgh (PIT) 18:18 Atlanta (ATL) S
KL 6377 Non-stop Boeing 737-900 (739) 1:48 Effective 2025-05-07 through 2025-06-07
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Daily 16:30 Pittsburgh (PIT) 18:19 Atlanta (ATL) S
KL 6377 Non-stop Boeing 737-900 (739) 1:49 Effective 2025-07-07 through 2025-09-07
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Daily 16:30 Pittsburgh (PIT) 18:21 Atlanta (ATL) S
KL 6377 Non-stop Boeing 737-900 (739) 1:51 Effective 2025-09-08 through 2025-10-25
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Mon-Fri,Sun 16:33 Pittsburgh (PIT) 18:25 Atlanta (ATL) S
KL 6377 Non-stop Boeing 737-900 (739) 1:52 Effective 2025-06-08 through 2025-07-06
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Tue 16:35 Pittsburgh (PIT) 18:25 Atlanta (ATL) S
KL 6377 Non-stop Boeing 737-900 (739) 1:50 Operates only on 2025-05-06
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Sat 16:42 Pittsburgh (PIT) 18:34 Atlanta (ATL) S
KL 6377 Non-stop Boeing 737-900 (739) 1:52 Effective 2025-06-14 through 2025-07-05
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Mon,Thu-Sun 16:50 Pittsburgh (PIT) 18:40 Atlanta (ATL) S
KL 6377 Non-stop Boeing 737-900 (739) 1:50 Valid until 2025-05-05
Codeshare flight, operated by Delta Air Lines.(DL 1353)
Daily 22:29 Ontario, Los Angeles (ONT) 2 05:39 Atlanta (ATL) S
KL 6377 Non-stop Airbus A321 (321) 4:10 Effective 2025-12-20 through 2026-01-05
Codeshare flight, operated by Delta Air Lines.(DL 828)
The flight arrives 1 day after departure.
Mon-Fri,Sun 22:59 Ontario, Los Angeles (ONT) 2 06:08 Atlanta (ATL) S
KL 6377 Non-stop Airbus A321 (321) 4:09 Effective 2025-10-26 through 2025-10-31
Codeshare flight, operated by Delta Air Lines.(DL 828)
The flight arrives 1 day after departure.
Sat 22:59 Ontario, Los Angeles (ONT) 2 05:08 Atlanta (ATL) S
KL 6377 Non-stop Airbus A321 (321) 4:09 Operates only on 2025-11-01
Codeshare flight, operated by Delta Air Lines.(DL 828)
The flight arrives 1 day after departure.
Daily 22:59 Ontario, Los Angeles (ONT) 2 06:08 Atlanta (ATL) S
KL 6377 Non-stop Airbus A321 (321) 4:09 Effective 2025-11-02 through 2025-12-19
Codeshare flight, operated by Delta Air Lines.(DL 828)
The flight arrives 1 day after departure.
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This flight number is listed as serving the following routes:


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KLM flight KL 6377: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
KLM KL6377
13:48
Atlanta (ATL) S

15:27
Pittsburgh (PIT)
Effective 2025-06-08 through 2025-06-30
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:39, non-stop
Boeing 737-900 (739)
KLM KL6377
13:50
Atlanta (ATL) S

15:25
Pittsburgh (PIT)
Effective 2025-05-23 through 2025-06-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:35, non-stop
Boeing 737-900 (739)
KLM KL6377
13:53
Atlanta (ATL) S

15:25
Pittsburgh (PIT)
Effective 2025-05-24 through 2025-06-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:32, non-stop
Boeing 737-900 (739)
KLM KL6377
13:58
Atlanta (ATL) S

15:37
Pittsburgh (PIT)
Effective 2025-06-14 through 2025-07-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:39, non-stop
Boeing 737-900 (739)
KLM KL6377
14:00
Atlanta (ATL) S

15:42
Pittsburgh (PIT)
Effective 2025-07-07 through 2025-09-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:42, non-stop
Boeing 737-900 (739)
KLM KL6377
14:00
Atlanta (ATL) S

15:38
Pittsburgh (PIT)
Effective 2025-09-08 through 2025-09-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:38, non-stop
Boeing 737-900 (739)
KLM KL6377
14:10
Atlanta (ATL) S

15:45
Pittsburgh (PIT)
Valid until 2025-05-05
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:35, non-stop
Boeing 737-900 (739)
KLM KL6377
16:30
Pittsburgh (PIT)

18:18
Atlanta (ATL) S
Effective 2025-05-07 through 2025-06-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:48, non-stop
Boeing 737-900 (739)
KLM KL6377
16:30
Pittsburgh (PIT)

18:19
Atlanta (ATL) S
Effective 2025-07-07 through 2025-09-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:49, non-stop
Boeing 737-900 (739)
KLM KL6377
16:30
Pittsburgh (PIT)

18:21
Atlanta (ATL) S
Effective 2025-09-08 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:51, non-stop
Boeing 737-900 (739)
KLM KL6377
16:33
Pittsburgh (PIT)

18:25
Atlanta (ATL) S
Effective 2025-06-08 through 2025-07-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:52, non-stop
Boeing 737-900 (739)
KLM KL6377
16:35
Pittsburgh (PIT)

18:25
Atlanta (ATL) S
Operates only on 2025-05-06
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:50, non-stop
Boeing 737-900 (739)
KLM KL6377
16:42
Pittsburgh (PIT)

18:34
Atlanta (ATL) S
Effective 2025-06-14 through 2025-07-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:52, non-stop
Boeing 737-900 (739)
KLM KL6377
16:50
Pittsburgh (PIT)

18:40
Atlanta (ATL) S
Valid until 2025-05-05
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 1353)
Duration: 1:50, non-stop
Boeing 737-900 (739)
KLM KL6377
22:29
Ontario, Los Angeles (ONT) 2

05:39(+1)
Atlanta (ATL) S
Effective 2025-12-20 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 828)
Duration: 4:10, non-stop
Airbus A321 (321)
The flight arrives 1 day after departure.
KLM KL6377
22:59
Ontario, Los Angeles (ONT) 2

06:08(+1)
Atlanta (ATL) S
Effective 2025-10-26 through 2025-10-31
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 828)
Duration: 4:09, non-stop
Airbus A321 (321)
The flight arrives 1 day after departure.
KLM KL6377
22:59
Ontario, Los Angeles (ONT) 2

05:08(+1)
Atlanta (ATL) S
Operates only on 2025-11-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 828)
Duration: 4:09, non-stop
Airbus A321 (321)
The flight arrives 1 day after departure.
KLM KL6377
22:59
Ontario, Los Angeles (ONT) 2

06:08(+1)
Atlanta (ATL) S
Effective 2025-11-02 through 2025-12-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 828)
Duration: 4:09, non-stop
Airbus A321 (321)
The flight arrives 1 day after departure.
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This flight number is listed as serving the following routes:
  • Atlanta (ATL) - Pittsburgh (PIT)
  • Ontario, Los Angeles (ONT) - Atlanta (ATL)
All KLM flights
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