All airlines flying from Seattle-Tacoma (SEA) to Dulles, Washington (IAD).

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FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 22:00 Seattle-Tacoma (SEA) 06:01 Dulles, Washington (IAD) China Eastern MU 8804 Non-stop Airbus A220-300 (223) 5:01 Effective from 2026-01-06 Codeshare flight, operated by Delta Air Lines.(DL 541) The flight arrives 1 day after departure.
Daily 22:30 Seattle-Tacoma (SEA) 06:20 Dulles, Washington (IAD) China Eastern MU 8804 Non-stop Airbus A220-300 (223) 4:50 Valid until 2025-05-06 Codeshare flight, operated by Delta Air Lines.(DL 541) The flight arrives 1 day after departure.
Wed 16:00 Seattle-Tacoma (SEA) 23:58 Dulles, Washington (IAD) Qatar Airways QR 8844 Non-stop Boeing 737 MAX 9 (7M9) 4:58 Effective 2025-05-07 through 2025-05-14 Codeshare flight, operated by Alaska Airlines.(AS 345)
Wed,Sun 16:00 Seattle-Tacoma (SEA) 23:59 Dulles, Washington (IAD) Qatar Airways QR 8844 Non-stop Boeing 737 MAX 9 (7M9) 4:59 Effective 2025-05-18 through 2025-05-28 Codeshare flight, operated by Alaska Airlines.(AS 406)
Sun 16:24 Seattle-Tacoma (SEA) 00:23 Dulles, Washington (IAD) Qatar Airways QR 8844 Non-stop Boeing 737 (73J) 4:59 Operates only on 2025-05-04 Codeshare flight, operated by Alaska Airlines.(AS 348) The flight arrives 1 day after departure.
Sun 16:24 Seattle-Tacoma (SEA) 00:23 Dulles, Washington (IAD) Qatar Airways QR 8844 Non-stop Boeing 737 MAX 9 (7M9) 4:59 Operates only on 2025-05-11 Codeshare flight, operated by Alaska Airlines.(AS 348) The flight arrives 1 day after departure.
Daily 08:00 Seattle-Tacoma (SEA) 16:11 Dulles, Washington (IAD) Brussels Airlines SN 8850 Non-stop Boeing 737-900 (739) 5:11 Effective 2025-05-22 through 2025-05-31 Codeshare flight, operated by United Airlines.(UA 2398)
Sun 08:00 Seattle-Tacoma (SEA) 16:11 Dulles, Washington (IAD) Brussels Airlines SN 8850 Non-stop Boeing 737 MAX 8 (7M8) 5:11 Effective 2025-06-01 through 2025-06-22 Codeshare flight, operated by United Airlines.(UA 2398)
Mon-Sat 08:00 Seattle-Tacoma (SEA) 16:11 Dulles, Washington (IAD) Brussels Airlines SN 8850 Non-stop Boeing 737-900 (739) 5:11 Effective 2025-06-02 through 2025-08-18 Codeshare flight, operated by United Airlines.(UA 2398)
Daily 08:00 Seattle-Tacoma (SEA) 16:10 Dulles, Washington (IAD) Brussels Airlines SN 8850 Non-stop Boeing 737 MAX 8 (7M8) 5:10 Effective 2025-08-19 through 2025-09-24 Codeshare flight, operated by United Airlines.(UA 2217)
Daily 08:00 Seattle-Tacoma (SEA) 16:10 Dulles, Washington (IAD) Brussels Airlines SN 8850 Non-stop Boeing 737 MAX 9 (7M9) 5:10 Effective 2025-09-25 through 2025-10-25 Codeshare flight, operated by United Airlines.(UA 2217)
Daily 08:00 Seattle-Tacoma (SEA) 15:53 Dulles, Washington (IAD) Brussels Airlines SN 8850 Non-stop Boeing 737-900 (739) 4:53 Effective 2025-10-26 through 2025-12-17 Codeshare flight, operated by United Airlines.(UA 2217)
Daily 08:00 Seattle-Tacoma (SEA) 15:53 Dulles, Washington (IAD) Brussels Airlines SN 8850 Non-stop Boeing 737-900 (739) 4:53 Effective from 2026-01-06 Codeshare flight, operated by United Airlines.(UA 2217)
Thu 08:10 Seattle-Tacoma (SEA) 16:18 Dulles, Washington (IAD) Brussels Airlines SN 8850 Non-stop Airbus A320 (320) 5:08 Operates only on 2025-05-01 Codeshare flight, operated by United Airlines.(UA 2398)
Daily 08:10 Seattle-Tacoma (SEA) 16:18 Dulles, Washington (IAD) Brussels Airlines SN 8850 Non-stop Boeing 737 MAX 9 (7M9) 5:08 Effective 2025-05-02 through 2025-05-21 Codeshare flight, operated by United Airlines.(UA 2398)
Sun 08:14 Seattle-Tacoma (SEA) 16:25 Dulles, Washington (IAD) Brussels Airlines SN 8850 Non-stop Boeing 737 MAX 8 (7M8) 5:11 Effective 2025-06-29 through 2025-08-17 Codeshare flight, operated by United Airlines.(UA 1873)
Daily 09:15 Seattle-Tacoma (SEA) 17:13 Dulles, Washington (IAD) American Airlines AA 9349 Non-stop Boeing 737 (737) 4:58 Effective 2025-06-12 through 2025-08-19 Codeshare flight, operated by Alaska Airlines.(AS 406)
Daily 09:55 Seattle-Tacoma (SEA) 17:55 Dulles, Washington (IAD) American Airlines AA 9349 Non-stop Boeing 737 (737) 5:00 Effective from 2025-10-04 Codeshare flight, operated by Alaska Airlines.(AS 406)
Mon,Wed-Fri,Sun 10:06 Seattle-Tacoma (SEA) 18:13 Dulles, Washington (IAD) American Airlines AA 9349 Non-stop Boeing 737 (737) 5:07 Valid until 2025-05-14 Codeshare flight, operated by Alaska Airlines.(AS 406)
Tue 10:06 Seattle-Tacoma (SEA) 18:13 Dulles, Washington (IAD) American Airlines AA 9349 Non-stop Boeing 737 MAX 8 (7M8) 5:07 Valid until 2025-05-13 Codeshare flight, operated by Alaska Airlines.(AS 406)
Daily 10:06 Seattle-Tacoma (SEA) 18:17 Dulles, Washington (IAD) American Airlines AA 9349 Non-stop Boeing 737 (737) 5:11 Effective 2025-08-20 through 2025-10-03 Codeshare flight, operated by Alaska Airlines.(AS 406)
Daily 16:00 Seattle-Tacoma (SEA) 23:59 Dulles, Washington (IAD) American Airlines AA 9349 Non-stop Boeing 737 (737) 4:59 Effective 2025-05-15 through 2025-06-11 Codeshare flight, operated by Alaska Airlines.(AS 406)
Daily 15:55 Seattle-Tacoma (SEA) 23:58 Dulles, Washington (IAD) American Airlines AA 9375 Non-stop Boeing 737 (737) 5:03 Effective 2025-08-20 through 2025-10-03 Codeshare flight, operated by Alaska Airlines.(AS 348)
Daily 15:59 Seattle-Tacoma (SEA) 23:59 Dulles, Washington (IAD) American Airlines AA 9375 Non-stop Boeing 737 (737) 5:00 Effective 2025-06-12 through 2025-08-19 Codeshare flight, operated by Alaska Airlines.(AS 348)
Daily 16:00 Seattle-Tacoma (SEA) 23:49 Dulles, Washington (IAD) American Airlines AA 9375 Non-stop Boeing 737 (737) 4:49 Effective 2025-10-04 through 2025-11-20 Codeshare flight, operated by Alaska Airlines.(AS 348)
Mon,Thu,Fri,Sun 16:24 Seattle-Tacoma (SEA) 00:23 Dulles, Washington (IAD) American Airlines AA 9375 Non-stop Boeing 737 (737) 4:59 Valid until 2025-05-12 Codeshare flight, operated by Alaska Airlines.(AS 348) The flight arrives 1 day after departure.
Daily 09:18 Seattle-Tacoma (SEA) 17:15 Dulles, Washington (IAD) American Airlines AA 9409 Non-stop Boeing 737 (737) 4:57 Effective 2025-05-15 through 2025-06-11 Codeshare flight, operated by Alaska Airlines.(AS 408)
Daily 21:55 Seattle-Tacoma (SEA) 05:55 Dulles, Washington (IAD) American Airlines AA 9440 Non-stop Boeing 737 (737) 5:00 Effective 2025-10-04 through 2025-10-31 Codeshare flight, operated by Alaska Airlines.(AS 367) The flight arrives 1 day after departure.
Sat 21:55 Seattle-Tacoma (SEA) 04:55 Dulles, Washington (IAD) American Airlines AA 9440 Non-stop Boeing 737 (737) 5:00 Operates only on 2025-11-01 Codeshare flight, operated by Alaska Airlines.(AS 367) The flight arrives 1 day after departure.
Daily 21:55 Seattle-Tacoma (SEA) 05:55 Dulles, Washington (IAD) American Airlines AA 9440 Non-stop Boeing 737 (737) 5:00 Effective 2025-11-02 through 2026-01-06 Codeshare flight, operated by Alaska Airlines.(AS 367) The flight arrives 1 day after departure.
Daily 21:55 Seattle-Tacoma (SEA) 05:55 Dulles, Washington (IAD) American Airlines AA 9440 Non-stop Boeing 737 (737) 5:00 Effective from 2026-02-12 Codeshare flight, operated by Alaska Airlines.(AS 367) The flight arrives 1 day after departure.
Daily 23:30 Seattle-Tacoma (SEA) 07:27 Dulles, Washington (IAD) American Airlines AA 9440 Non-stop Boeing 737 (737) 4:57 Effective 2025-06-12 through 2025-07-03 Codeshare flight, operated by Alaska Airlines.(AS 367) The flight arrives 1 day after departure.
Daily 23:30 Seattle-Tacoma (SEA) 07:27 Dulles, Washington (IAD) American Airlines AA 9440 Non-stop Boeing 737 (737) 4:57 Effective 2025-07-05 through 2025-08-19 Codeshare flight, operated by Alaska Airlines.(AS 367) The flight arrives 1 day after departure.
Daily 23:30 Seattle-Tacoma (SEA) 07:32 Dulles, Washington (IAD) American Airlines AA 9440 Non-stop Boeing 737 (737) 5:02 Effective 2025-08-20 through 2025-10-03 Codeshare flight, operated by Alaska Airlines.(AS 367) The flight arrives 1 day after departure.

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A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Dulles, Washington airport (IAD).
The flight distance is 2299 miles, or 3699 km.
The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-5 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 4:48 and 5:11.

Return (IAD-SEA) flights

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All airlines flying from Seattle-Tacoma (SEA) to Dulles, Washington (IAD).

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FLIGHT SCHEDULE

Direct Codeshare Flights:

China Eastern MU8804

22:00

Seattle-Tacoma (SEA)

06:01(+1)

Dulles, Washington (IAD)

Effective from 2026-01-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 541)

Duration: 5:01, non-stop
Airbus A220-300 (223)
The flight arrives 1 day after departure.

China Eastern MU8804

22:30

Seattle-Tacoma (SEA)

06:20(+1)

Dulles, Washington (IAD)

Valid until 2025-05-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 541)

Duration: 4:50, non-stop
Airbus A220-300 (223)
The flight arrives 1 day after departure.

Qatar Airways QR8844

16:00

Seattle-Tacoma (SEA)

23:58

Dulles, Washington (IAD)

Effective 2025-05-07 through 2025-05-14

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 345)

Duration: 4:58, non-stop
Boeing 737 MAX 9 (7M9)

Qatar Airways QR8844

16:00

Seattle-Tacoma (SEA)

23:59

Dulles, Washington (IAD)

Effective 2025-05-18 through 2025-05-28

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 406)

Duration: 4:59, non-stop
Boeing 737 MAX 9 (7M9)

Qatar Airways QR8844

16:24

Seattle-Tacoma (SEA)

00:23(+1)

Dulles, Washington (IAD)

Operates only on 2025-05-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 348)

Duration: 4:59, non-stop
Boeing 737 (73J)
The flight arrives 1 day after departure.

Qatar Airways QR8844

16:24

Seattle-Tacoma (SEA)

00:23(+1)

Dulles, Washington (IAD)

Operates only on 2025-05-11

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 348)

Duration: 4:59, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Brussels Airlines SN8850

08:00

Seattle-Tacoma (SEA)

16:11

Dulles, Washington (IAD)

Effective 2025-05-22 through 2025-05-31

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 2398)

Duration: 5:11, non-stop
Boeing 737-900 (739)

Brussels Airlines SN8850

08:00

Seattle-Tacoma (SEA)

16:11

Dulles, Washington (IAD)

Effective 2025-06-01 through 2025-06-22

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by United Airlines. (UA 2398)

Duration: 5:11, non-stop
Boeing 737 MAX 8 (7M8)

Brussels Airlines SN8850

08:00

Seattle-Tacoma (SEA)

16:11

Dulles, Washington (IAD)

Effective 2025-06-02 through 2025-08-18

Mon

Tue

Wed

Thu

Fri

Sat

Sun
-

Codeshare flight, operated by United Airlines. (UA 2398)

Duration: 5:11, non-stop
Boeing 737-900 (739)

Brussels Airlines SN8850

08:00

Seattle-Tacoma (SEA)

16:10

Dulles, Washington (IAD)

Effective 2025-08-19 through 2025-09-24

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 2217)

Duration: 5:10, non-stop
Boeing 737 MAX 8 (7M8)

Brussels Airlines SN8850

08:00

Seattle-Tacoma (SEA)

16:10

Dulles, Washington (IAD)

Effective 2025-09-25 through 2025-10-25

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 2217)

Duration: 5:10, non-stop
Boeing 737 MAX 9 (7M9)

Brussels Airlines SN8850

08:00

Seattle-Tacoma (SEA)

15:53

Dulles, Washington (IAD)

Effective 2025-10-26 through 2025-12-17

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 2217)

Duration: 4:53, non-stop
Boeing 737-900 (739)

Brussels Airlines SN8850

08:00

Seattle-Tacoma (SEA)

15:53

Dulles, Washington (IAD)

Effective from 2026-01-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 2217)

Duration: 4:53, non-stop
Boeing 737-900 (739)

Brussels Airlines SN8850

08:10

Seattle-Tacoma (SEA)

16:18

Dulles, Washington (IAD)

Operates only on 2025-05-01

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by United Airlines. (UA 2398)

Duration: 5:08, non-stop
Airbus A320 (320)

Brussels Airlines SN8850

08:10

Seattle-Tacoma (SEA)

16:18

Dulles, Washington (IAD)

Effective 2025-05-02 through 2025-05-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by United Airlines. (UA 2398)

Duration: 5:08, non-stop
Boeing 737 MAX 9 (7M9)

Brussels Airlines SN8850

08:14

Seattle-Tacoma (SEA)

16:25

Dulles, Washington (IAD)

Effective 2025-06-29 through 2025-08-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by United Airlines. (UA 1873)

Duration: 5:11, non-stop
Boeing 737 MAX 8 (7M8)

American Airlines AA9349

09:15

Seattle-Tacoma (SEA)

17:13

Dulles, Washington (IAD)

Effective 2025-06-12 through 2025-08-19

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 406)

Duration: 4:58, non-stop
Boeing 737 (737)

American Airlines AA9349

09:55

Seattle-Tacoma (SEA)

17:55

Dulles, Washington (IAD)

Effective from 2025-10-04

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 406)

Duration: 5:00, non-stop
Boeing 737 (737)

American Airlines AA9349

10:06

Seattle-Tacoma (SEA)

18:13

Dulles, Washington (IAD)

Valid until 2025-05-14

Mon

Tue
-

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 406)

Duration: 5:07, non-stop
Boeing 737 (737)

American Airlines AA9349

10:06

Seattle-Tacoma (SEA)

18:13

Dulles, Washington (IAD)

Valid until 2025-05-13

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 406)

Duration: 5:07, non-stop
Boeing 737 MAX 8 (7M8)

American Airlines AA9349

10:06

Seattle-Tacoma (SEA)

18:17

Dulles, Washington (IAD)

Effective 2025-08-20 through 2025-10-03

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 406)

Duration: 5:11, non-stop
Boeing 737 (737)

American Airlines AA9349

16:00

Seattle-Tacoma (SEA)

23:59

Dulles, Washington (IAD)

Effective 2025-05-15 through 2025-06-11

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 406)

Duration: 4:59, non-stop
Boeing 737 (737)

American Airlines AA9375

15:55

Seattle-Tacoma (SEA)

23:58

Dulles, Washington (IAD)

Effective 2025-08-20 through 2025-10-03

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 348)

Duration: 5:03, non-stop
Boeing 737 (737)

American Airlines AA9375

15:59

Seattle-Tacoma (SEA)

23:59

Dulles, Washington (IAD)

Effective 2025-06-12 through 2025-08-19

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 348)

Duration: 5:00, non-stop
Boeing 737 (737)

American Airlines AA9375

16:00

Seattle-Tacoma (SEA)

23:49

Dulles, Washington (IAD)

Effective 2025-10-04 through 2025-11-20

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 348)

Duration: 4:49, non-stop
Boeing 737 (737)

American Airlines AA9375

16:24

Seattle-Tacoma (SEA)

00:23(+1)

Dulles, Washington (IAD)

Valid until 2025-05-12

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 348)

Duration: 4:59, non-stop
Boeing 737 (737)
The flight arrives 1 day after departure.

American Airlines AA9409

09:18

Seattle-Tacoma (SEA)

17:15

Dulles, Washington (IAD)

Effective 2025-05-15 through 2025-06-11

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 408)

Duration: 4:57, non-stop
Boeing 737 (737)

American Airlines AA9440

21:55

Seattle-Tacoma (SEA)

05:55(+1)

Dulles, Washington (IAD)

Effective 2025-10-04 through 2025-10-31

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 367)

Duration: 5:00, non-stop
Boeing 737 (737)
The flight arrives 1 day after departure.

American Airlines AA9440

21:55

Seattle-Tacoma (SEA)

04:55(+1)

Dulles, Washington (IAD)

Operates only on 2025-11-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 367)

Duration: 5:00, non-stop
Boeing 737 (737)
The flight arrives 1 day after departure.

American Airlines AA9440

21:55

Seattle-Tacoma (SEA)

05:55(+1)

Dulles, Washington (IAD)

Effective 2025-11-02 through 2026-01-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 367)

Duration: 5:00, non-stop
Boeing 737 (737)
The flight arrives 1 day after departure.

American Airlines AA9440

21:55

Seattle-Tacoma (SEA)

05:55(+1)

Dulles, Washington (IAD)

Effective from 2026-02-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 367)

Duration: 5:00, non-stop
Boeing 737 (737)
The flight arrives 1 day after departure.

American Airlines AA9440

23:30

Seattle-Tacoma (SEA)

07:27(+1)

Dulles, Washington (IAD)

Effective 2025-06-12 through 2025-07-03

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 367)

Duration: 4:57, non-stop
Boeing 737 (737)
The flight arrives 1 day after departure.

American Airlines AA9440

23:30

Seattle-Tacoma (SEA)

07:27(+1)

Dulles, Washington (IAD)

Effective 2025-07-05 through 2025-08-19

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 367)

Duration: 4:57, non-stop
Boeing 737 (737)
The flight arrives 1 day after departure.

American Airlines AA9440

23:30

Seattle-Tacoma (SEA)

07:32(+1)

Dulles, Washington (IAD)

Effective 2025-08-20 through 2025-10-03

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 367)

Duration: 5:02, non-stop
Boeing 737 (737)
The flight arrives 1 day after departure.

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A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Dulles, Washington airport (IAD).
The flight distance is 2299 miles, or 3699 km.
The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-5 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 4:48 and 5:11.

Return (IAD-SEA) flights

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