Seattle (SEA) to Washington (DCA) flights: who flies it

Seattle to Washington flight schedule

Scheduled nonstop departures for SEA to DCA starting October 23, 2026, last checked against our schedule feed on October 18, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Scheduled nonstop departures from Seattle (SEA) to Washington (DCA)
Date	Flight	Airline	Departs SEA	Arrives DCA	Duration	Aircraft
Fri, Oct 23	DL 786	Delta Air Lines	07:20	15:23	5h 3m	Airbus A321neo family
Fri, Oct 23	AS 4	Alaska Airlines, Inc.	08:00	16:25	5h 25m	Boeing 737-800
Fri, Oct 23	AS 2	Alaska Airlines, Inc.	13:49	21:59	5h 10m	Boeing 737-800
Sat, Oct 24	DL 786	Delta Air Lines	07:20	15:23	5h 3m	Airbus A321neo family
Sat, Oct 24	AS 4	Alaska Airlines, Inc.	08:00	16:25	5h 25m	Boeing 737-800
Sat, Oct 24	AS 2	Alaska Airlines, Inc.	13:49	21:59	5h 10m	Boeing 737 MAX 8
Sun, Oct 25	DL 786	Delta Air Lines	07:20	15:23	5h 3m	Airbus A321neo family
Sun, Oct 25	AS 4	Alaska Airlines, Inc.	08:00	16:25	5h 25m	Boeing 737-800
Sun, Oct 25	AS 2	Alaska Airlines, Inc.	13:49	21:59	5h 10m	Boeing 737-800
Mon, Oct 26	DL 786	Delta Air Lines	07:20	15:23	5h 3m	Airbus A321neo family
Mon, Oct 26	AS 4	Alaska Airlines, Inc.	08:00	16:25	5h 25m	Boeing 737 MAX 8
Mon, Oct 26	AS 2	Alaska Airlines, Inc.	13:49	21:59	5h 10m	Boeing 737 MAX 8
Tue, Oct 27	DL 786	Delta Air Lines	07:20	15:23	5h 3m	Airbus A321neo family
Tue, Oct 27	AS 4	Alaska Airlines, Inc.	08:00	16:25	5h 25m	Boeing 737 MAX 8
Tue, Oct 27	AS 2	Alaska Airlines, Inc.	13:49	21:59	5h 10m	Boeing 737 MAX 8
Wed, Oct 28	DL 786	Delta Air Lines	07:20	15:23	5h 3m	Airbus A321neo family
Wed, Oct 28	AS 4	Alaska Airlines, Inc.	08:00	16:25	5h 25m	Boeing 737-800
Wed, Oct 28	AS 2	Alaska Airlines, Inc.	13:49	21:59	5h 10m	Boeing 737 MAX 8
Thu, Oct 29	DL 786	Delta Air Lines	07:20	15:23	5h 3m	Airbus A321neo family
Thu, Oct 29	AS 4	Alaska Airlines, Inc.	08:00	16:25	5h 25m	Boeing 737 MAX 8
Thu, Oct 29	AS 2	Alaska Airlines, Inc.	13:49	21:59	5h 10m	Boeing 737-800

Showing all 21 scheduled SEA to DCA departures across 7 days with service, starting October 23, 2026. Later dates are on the interactive map.

Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure.

See every SEA to DCA date on the interactive map

Aircraft on the Seattle to Washington nonstop

In the schedule table on this page, Alaska Airlines flies the Boeing 737-800 and the Boeing 737 MAX 8, and Delta Air Lines flies the Airbus A321neo family. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.

Confirmed upgrade & award space on SEA to DCA departures

2LNR tracks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines, segment by segment and date by date. Open the calendar for Seattle to Washington to see which departures have space, the next 14 days free on every product and the full horizon on Pro.

In the 7 days to October 19, 2026, 2LNR checked award space on Seattle to Washington departures from October 19 to November 1. Alaska Airlines had space open on 4 of 14 dates checked and Delta Air Lines on 12 of 14.

See real availability

Confirmed upgrade or award seats by date on the SEA to DCA departures 2LNR tracks, checked against live inventory so you know what's open before you book.

Set an alert

Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're tracking.

Plan on the map

See SEA to DCA on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Seattle to Washington nonstop

Carriers operating SEA to DCA nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date.

See SEA to DCA on the interactive map →

Frequently asked questions about SEA to DCA

How long is the flight from Seattle (SEA) to Washington (DCA)?

Scheduled flight times from Seattle (SEA) to Washington (DCA) run from 5h 3m to 5h 25m across the departures in the schedule table on this page. The nonstop covers about 2,322 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.

Which airlines fly nonstop from SEA to DCA?

Alaska Airlines and Delta Air Lines fly SEA to DCA nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines.

How many flights a week are there from SEA to DCA?

About 21 nonstop flights a week run between Seattle (SEA) and Washington (DCA) in the current schedule, operated by Alaska Airlines and Delta Air Lines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.

What time do flights from SEA to DCA depart?

Scheduled SEA to DCA nonstops in the next 7 days with service leave between 07:20 and 13:49, local time at Seattle. The schedule table on this page lists every departure by date, with its arrival time and aircraft.

Which flights operate SEA to DCA nonstop?

In the schedule table on this page, SEA to DCA nonstops fly as AS 2 and AS 4 on Alaska Airlines, and DL 786 on Delta Air Lines. The table lists each departure by date with its times and aircraft.

How do I check upgrade or award availability on SEA to DCA?

Open the SEA to DCA route on the interactive map or the matrix to see confirmed upgrade and award space by date on Alaska Airlines and Delta Air Lines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens.