Avianca flights from Seattle-Tacoma (SEA) to Dulles, Washington (IAD).

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 08:00 Seattle-Tacoma (SEA) 16:10 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737 MAX 8 (7M8) 5:10 Effective 2025-08-19 through 2025-08-31
Codeshare flight, operated by United Airlines.(UA 2217)
Tue,Thu,Sat 08:00 Seattle-Tacoma (SEA) 16:10 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737 MAX 8 (7M8) 5:10 Effective 2025-09-02 through 2025-09-23
Codeshare flight, operated by United Airlines.(UA 2217)
Tue,Thu,Sat 08:00 Seattle-Tacoma (SEA) 15:53 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737-900 (739) 4:53 Effective 2025-12-02 through 2025-12-16
Codeshare flight, operated by United Airlines.(UA 2217)
Tue,Thu,Sat 08:00 Seattle-Tacoma (SEA) 15:53 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737-900 (739) 4:53 Effective from 2026-01-06
Codeshare flight, operated by United Airlines.(UA 2217)
Daily 12:50 Seattle-Tacoma (SEA) 20:48 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737-900 (739) 4:58 Effective 2025-10-26 through 2025-12-01
Codeshare flight, operated by United Airlines.(UA 2131)
Daily 12:50 Seattle-Tacoma (SEA) 20:48 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737-900 (739) 4:58 Effective 2025-12-18 through 2026-01-05
Codeshare flight, operated by United Airlines.(UA 2131)
Mon-Sat 12:55 Seattle-Tacoma (SEA) 21:03 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737-900 (739) 5:08 Valid until 2025-05-21
Codeshare flight, operated by United Airlines.(UA 2275)
Sun 12:55 Seattle-Tacoma (SEA) 21:03 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Airbus A319 (319) 5:08 Effective 2025-05-04 through 2025-05-18
Codeshare flight, operated by United Airlines.(UA 2275)
Tue-Fri 12:55 Seattle-Tacoma (SEA) 21:02 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737-900 (739) 5:07 Effective 2025-05-22 through 2025-06-25
Codeshare flight, operated by United Airlines.(UA 2275)
Sat 12:55 Seattle-Tacoma (SEA) 21:02 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737 MAX 9 (7M9) 5:07 Effective 2025-05-24 through 2025-06-21
Codeshare flight, operated by United Airlines.(UA 2275)
Mon,Sun 12:55 Seattle-Tacoma (SEA) 21:02 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737-700 (73G) 5:07 Effective 2025-05-25 through 2025-06-23
Codeshare flight, operated by United Airlines.(UA 2275)
Mon-Fri,Sun 12:55 Seattle-Tacoma (SEA) 20:52 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737-900 (739) 4:57 Effective 2025-06-26 through 2025-07-31
Codeshare flight, operated by United Airlines.(UA 2275)
Sat 12:55 Seattle-Tacoma (SEA) 20:52 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737-700 (73G) 4:57 Operates only on 2025-06-28
Codeshare flight, operated by United Airlines.(UA 2275)
Sat 12:55 Seattle-Tacoma (SEA) 20:52 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737 MAX 9 (7M9) 4:57 Operates only on 2025-07-05
Codeshare flight, operated by United Airlines.(UA 2275)
Sat 12:55 Seattle-Tacoma (SEA) 20:52 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737-700 (73G) 4:57 Effective 2025-07-12 through 2025-08-16
Codeshare flight, operated by United Airlines.(UA 2275)
Mon-Fri 12:55 Seattle-Tacoma (SEA) 20:52 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737 MAX 9 (7M9) 4:57 Effective 2025-08-01 through 2025-08-18
Codeshare flight, operated by United Airlines.(UA 2275)
Sun 12:55 Seattle-Tacoma (SEA) 20:52 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737-900 (739) 4:57 Effective 2025-08-03 through 2025-08-17
Codeshare flight, operated by United Airlines.(UA 2275)
Daily 13:09 Seattle-Tacoma (SEA) 21:15 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737 MAX 8 (7M8) 5:06 Effective 2025-09-25 through 2025-10-25
Codeshare flight, operated by United Airlines.(UA 2131)
Sun 22:58 Seattle-Tacoma (SEA) 07:01 Dulles, Washington (IAD)
Avianca AV 2029 Non-stop Boeing 737 MAX 9 (7M9) 5:03 Effective 2025-09-07 through 2025-09-21
Codeshare flight, operated by United Airlines.(UA 2019)
The flight arrives 1 day after departure.
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Avianca flights from Seattle-Tacoma (SEA) to Dulles, Washington (IAD).
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:

Effective 2025-08-19 through 2025-08-31
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)

Effective 2025-09-02 through 2025-09-23
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)

Effective 2025-12-02 through 2025-12-16
Mon
-
Tue
Wed
-
Thu
Fri
-
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 2217)
Duration: 4:53, non-stop
Boeing 737-900 (739)

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)

Effective 2025-10-26 through 2025-12-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 2131)
Duration: 4:58, non-stop
Boeing 737-900 (739)

Effective 2025-12-18 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 2131)
Duration: 4:58, non-stop
Boeing 737-900 (739)

Valid until 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 2275)
Duration: 5:08, non-stop
Boeing 737-900 (739)

Effective 2025-05-04 through 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 2275)
Duration: 5:08, non-stop
Airbus A319 (319)

Effective 2025-05-22 through 2025-06-25
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 2275)
Duration: 5:07, non-stop
Boeing 737-900 (739)

Effective 2025-05-24 through 2025-06-21
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 2275)
Duration: 5:07, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2025-05-25 through 2025-06-23
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 2275)
Duration: 5:07, non-stop
Boeing 737-700 (73G)

Effective 2025-06-26 through 2025-07-31
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 2275)
Duration: 4:57, non-stop
Boeing 737-900 (739)

Operates only on 2025-06-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 2275)
Duration: 4:57, non-stop
Boeing 737-700 (73G)

Operates only on 2025-07-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 2275)
Duration: 4:57, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2025-07-12 through 2025-08-16
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by United Airlines. (UA 2275)
Duration: 4:57, non-stop
Boeing 737-700 (73G)

Effective 2025-08-01 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Codeshare flight, operated by United Airlines. (UA 2275)
Duration: 4:57, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2025-08-03 through 2025-08-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 2275)
Duration: 4:57, non-stop
Boeing 737-900 (739)

Effective 2025-09-25 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by United Airlines. (UA 2131)
Duration: 5:06, non-stop
Boeing 737 MAX 8 (7M8)

Effective 2025-09-07 through 2025-09-21
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by United Airlines. (UA 2019)
Duration: 5:03, non-stop
Boeing 737 MAX 9 (7M9)
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 4:53 and 5:10.