Direct (non-stop) flights from SeaTac (SEA) to Arlington (DCA)
Find comprehensive flight information, schedules, and booking details for direct flights from SeaTac (SEA) to Arlington (DCA). This popular route is operated by 2 airlines, offering multiple daily departures.• 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)
SeaTac (SEA)
Arlington (DCA)
FLIGHT TIME
4h 56m - 5h 18m
FLIGHT DISTANCE
2335 miles (3757 km)
5h 0m - 5h 6m
07:25
13:57
2335 miles (3757 km)
March
2 (Show)
21
Flight Schedule
December 2025
Airlines with direct flights from SeaTac (SEA) to Arlington (DCA)
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 7:00, 8:00, 13:00, offering more flight options and potentially better connections.
SeaTac (SEA) - Arlington (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
DecRelated Information
Airports: SEA • DCA Airport
Airlines operating this route: Delta Air Lines (DL), Alaska Airlines
Frequently Asked Questions
How many flights operate from SEA to DCA?
There are 3 direct flights operating from SEA to DCA. Approximately 2-3 flights daily.
Which airlines operate flights from SEA to DCA?
2 airlines operate on this route: Delta Air Lines, Alaska Airlines.
How long is the flight from SEA to DCA?
The flight duration from SEA to DCA is approximately 4h 56m - 5h 18m.
What is the distance from SEA to DCA?
The distance from SEA to DCA is 2335 miles (3757 km).
What is the flight time range for this route?
Flight times on this route range from 5h 0m - 5h 6m.
What are the earliest and latest flight departure times?
The earliest flight departs at 07:25 and the latest flight departs at 13:57.
What is the cheapest month to fly from SEA to DCA?
March is typically the cheapest month to fly on this route.
How many flights operate per week on this route?
Approximately 21 flights operate per week from SEA to DCA.
What types of aircraft operate on this route?
This route is served by Boeing 757-200 (winglets) Passenger, Boeing 737-800 (winglets) Passenger/BBJ2.
What is the average flight price from SEA to DCA?
The average flight price for a round-trip ticket from SEA to DCA is approximately $613 USD. Prices can vary based on booking time, season, and airline.
When is the best time to book flights from SEA to DCA for the lowest prices?
March is typically the cheapest month to fly from SEA to DCA. Booking in advance and avoiding peak travel seasons can help you find better deals.
How many airlines offer flights from SEA to DCA?
2 airlines offer direct flights from SEA to DCA, providing travelers with multiple options for scheduling and pricing.
How far is DCA from SEA?
The distance from SEA to DCA is 2335 miles (3757 km). This is a long-haul flight route.
How long does it take to fly from SEA to DCA?
The flight time from SEA to DCA is approximately 4h 56m - 5h 18m. Actual flight duration may vary based on weather conditions, aircraft type, and routing.