Alaska Airlines flights from SEA to DCA
Find comprehensive Alaska Airlines flight information, schedules, and booking details for direct flights from SEA to DCA. Alaska Airlines operates 2-3 flights daily flights on this route.• Flight Duration: 4h 56m - 5h 18m (average flight time)• Distance: 2335 miles (3757 km) (air miles between airports)• Daily Flights: 2-3 flights (scheduled departures per day)
SEA
DCA
FLIGHT TIME
4h 56m - 5h 18m
FLIGHT DISTANCE
2335 miles (3757 km)
5h 2m - 5h 6m
08:00
13:57
2335 miles (3757 km)
March
1 (Show)
21
Alaska Airlines Flight Schedule from SEA to DCA
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
AS4 |  Alaska Airlines | 08:00 | 16:06:00 | Boeing 737-800 (winglets) Passenger/BBJ2 |
AS2 | Alaska Airlines | 13:57 | 21:59:00 | Boeing 737-800 (winglets) Passenger/BBJ2 |
Alaska Airlines Monthly Flight Calendar
December 2025
Route Insights
Duration variability: Flight duration on this route can vary based on aircraft type, wind conditions, and airline scheduling. Average duration is 4h 56m - 5h 18m.
Pricing patterns: March typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 8:00, 13:00, offering more flight options and potentially better connections.
SEA - DCA flight price statistics
$613
ApproximateThe numbers are average prices found based on user searches for direct flights between the airports. It's calculated from the cheapest prices found per month for a round-trip with 1 adult and can vary depending on the amount of data we have for this particular route.
$456
Jan$552
Feb$390
Mar$707
Apr$707
May$884
Jun$801
Jul$838
Aug$558
Sep$398
Oct$398
Nov$661
DecAlaska Airlines Terminal Information
Terminal information for Alaska Airlines on this route is currently being updated. Please check back soon or contact the airports directly for terminal details.
Frequently Asked Questions about Alaska Airlines Flights
How many Alaska Airlines flights operate from SEA to DCA?
Alaska Airlines operates 2 flights from SEA to DCA.
What city does DCA airport serve?
DCA airport serves Arlington.
How long is the Alaska Airlines flight from SEA to DCA?
The flight duration is approximately 4h 56m - 5h 18m.
What is the distance from SEA to DCA?
The distance is 2335 miles (3757 km).
What aircraft does Alaska Airlines use on this route?
Alaska Airlines uses Boeing 737-800 (winglets) Passenger/BBJ2 on this route.
Which other airlines operate on this route?
1 other airline operates on this route: Delta Air Lines.
What are the earliest and latest Alaska Airlines flight departure times?
The earliest Alaska Airlines flight departs at 08:00 and the latest departs at 13:57.
What is the cheapest month to fly Alaska Airlines from SEA to DCA?
March is typically the cheapest month to fly Alaska Airlines on this route.
What is the average price for a Alaska Airlines flight from SEA to DCA?
The average price for a round-trip Alaska Airlines flight on this route is approximately $613. Prices can vary based on booking time and demand.
How many Alaska Airlines flights operate per week on this route?
Alaska Airlines operates approximately 21 flights per week from SEA to DCA.