Nonstop flights from Washington to Seattle

3 airlines fly from 3 Washington airports (IAD, DCA and BWI) to Seattle (SEA), with up to 12 flights a day.

IADSEA

Routes

3 airport pairs

When they leave

Washington time

6:03a7:15pFirst departure 6:03 AM, last 7:15 PM

Six in the morning, 6:03 AM to 9:30 AM, then three in the afternoon, 1:10 PM to 4:35 PM, then five in the evening, 5:00 PM to 7:15 PM.

Every flight

Earliest first

6:03 AM→8:48 AMIAD to SEAAlaska AirlinesBoeing 737 MAX 9Daily
7:10 AM→9:55 AMIAD to SEADelta Air LinesAirbus A220-300Daily
7:50 AM→10:29 AMBWI to SEAAlaska AirlinesBoeing 737Daily
8:00 AM→10:58 AMDCA to SEAAlaska AirlinesBoeing 737Daily
9:00 AM→11:51 AMIAD to SEAUnited AirlinesBoeing 737Mon, Thu, Fri, Sat, Sun
9:30 AM→12:16 PMIAD to SEAAlaska AirlinesBoeing 737 MAX 9Daily
1:10 PM→3:55 PMIAD to SEAUnited AirlinesBoeing 737 MAX 9Mon, Thu, Fri, Sat, Sun
1:20 PM→4:06 PMIAD to SEAUnited AirlinesBoeing 737Tue, Wed
4:35 PM→7:41 PMDCA to SEADelta Air LinesAirbus A321neoDaily
5:00 PM→7:59 PMDCA to SEAAlaska AirlinesBoeing 737 MAX 8Daily
5:55 PM→8:46 PMIAD to SEAUnited AirlinesBoeing 737 MAX 9Mon, Thu, Fri, Sun
6:00 PM→8:45 PMIAD to SEAUnited AirlinesBoeing 737 MAX 9Wed
6:14 PM→9:09 PMIAD to SEAAlaska AirlinesBoeing 737Daily
7:15 PM→9:57 PMBWI to SEAAlaska AirlinesBoeing 737Daily

Schedules last checked Sep 19, 2026. Times are local.

Flying from Washington to Seattle

Alaska Airlines flies most often, 7 times a day on the Boeing 737, Boeing 737 MAX 9 and Boeing 737 MAX 8. United Airlines flies 1 to 3 times a day on the Boeing 737 MAX 9 and Boeing 737. Delta Air Lines flies twice a day on the Airbus A220-300 and Airbus A321neo.

Flights run every day of the week, from 10 on Tuesdays to 12 on Mondays, Thursdays, Fridays and Sundays. The first arrival in Seattle is at 8:48 AM and the last at 9:57 PM.

IAD to SEA is the busiest airport pair, with 45 flights a week, then DCA to SEA with 21 and BWI to SEA with 14.

On BWI to SEA, Southwest Airlines stopped flying it after Sep 30.

Flying back, Seattle to Washington has 81 nonstop flights a week.

Return flights

Seattle to WashingtonView

Find the cheapest day to fly from Washington to Seattle.

Schedules as of Oct 9, 2026.