Direct (non-stop) flights from Arlington (DCA) to SeaTac (SEA)
Find comprehensive flight information, schedules, and booking details for direct flights from Arlington (DCA) to SeaTac (SEA). This popular route is operated by 2 airlines, offering multiple daily departures.• Flight Duration: 5h 39m - 6h 13m (average flight time)• Distance: 2335 miles (3757 km) (air miles between airports)• Daily Flights: 2-3 flights (scheduled departures per day)
Arlington (DCA)
SeaTac (SEA)
FLIGHT TIME
5h 39m - 6h 13m
FLIGHT DISTANCE
2335 miles (3757 km)
6h 3m - 6h 5m
08:00
17:00
2335 miles (3757 km)
March
2 (Show)
21
Flight Schedule
December 2025
Airlines with direct flights from Arlington (DCA) to SeaTac (SEA)
Route Insights
Duration variability: Flight duration on this route can vary based on aircraft type, wind conditions, and airline scheduling. Average duration is 5h 39m - 6h 13m.
Pricing patterns: March typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 8:00, 16:00, 17:00, offering more flight options and potentially better connections.
Arlington (DCA) - SeaTac (SEA) flight price statistics
$608
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$397
Mar$708
Apr$798
May$744
Jun$858
Jul$681
Aug$558
Sep$508
Oct$634
Nov$398
DecRelated Information
Airports: DCA • SEA Airport
Airlines operating this route: Alaska Airlines (AS), Delta Air Lines
Frequently Asked Questions
How many flights operate from DCA to SEA?
There are 3 direct flights operating from DCA to SEA. Approximately 2-3 flights daily.
Which airlines operate flights from DCA to SEA?
2 airlines operate on this route: Alaska Airlines, Delta Air Lines.
How long is the flight from DCA to SEA?
The flight duration from DCA to SEA is approximately 5h 39m - 6h 13m.
What is the distance from DCA to SEA?
The distance from DCA to SEA is 2335 miles (3757 km).
What is the flight time range for this route?
Flight times on this route range from 6h 3m - 6h 5m.
What are the earliest and latest flight departure times?
The earliest flight departs at 08:00 and the latest flight departs at 17:00.
What is the cheapest month to fly from DCA to SEA?
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 DCA to SEA.
What types of aircraft operate on this route?
This route is served by Boeing 737-800 (winglets) Passenger/BBJ2, Boeing 757-200 (winglets) Passenger, Boeing 737MAX 8 Passenger.
What is the average flight price from DCA to SEA?
The average flight price for a round-trip ticket from DCA to SEA is approximately $608 USD. Prices can vary based on booking time, season, and airline.
When is the best time to book flights from DCA to SEA for the lowest prices?
March is typically the cheapest month to fly from DCA to SEA. Booking in advance and avoiding peak travel seasons can help you find better deals.
How many airlines offer flights from DCA to SEA?
2 airlines offer direct flights from DCA to SEA, providing travelers with multiple options for scheduling and pricing.
How far is SEA from DCA?
The distance from DCA to SEA is 2335 miles (3757 km). This is a long-haul flight route.
How long does it take to fly from DCA to SEA?
The flight time from DCA to SEA is approximately 5h 39m - 6h 13m. Actual flight duration may vary based on weather conditions, aircraft type, and routing.