Flights operate between Seattle (SEA) and Arlington (DCA).
1 airline operates this route with 2-3 flights daily flights.
Average flight time is 4h 56m - 5h 18m.
Route distance is 2335 miles (3757 km).
Route Distance
2335 miles (3757 km)
Average Duration
4h 56m - 5h 18m
Airlines Operating This Route
Alaska Airlines
Flight Frequency
Daily Flights
2-3 flights
Weekly Flights
21
Typical Departure Time Ranges
Earliest Departure
08:00
Latest Departure
13:57
Route Intelligence Dashboard
Overall Connectivity Score
60
GoodRoute Diversity
1
Direct Routes
Alaska Airlines serves 1 destination from SEA
Weekly Frequency
14
Weekly Flights
Trend: Stable
Top 1 Most Frequent Routes - Details
| Route | Weekly Flights | Duration | Distance | Reliability |
|---|---|---|---|---|
| SEA → Arlington (DCA) (DCA) | 14/week | 4h 56m - 5h 18m | 2,335 km | Moderate |
Flight Schedule & Filters
Alaska Airlines flights from SeaTac (SEA) to Arlington (DCA)
Alaska Airlines operates scheduled nonstop flights between SeaTac (SEA) and Arlington (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)
SeaTac (SEA)
US
Arlington (DCA)
US
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 Terminal Information & Contact
Departure Terminal - SeaTac (SEA)
Terminal: 1
Phone: 1-800-252-7522
Location: 1, Seattle, US
Arrival Terminal - Arlington (DCA)
Terminal: 2
Phone: 1-800-252-7522
Location: 2, Washington, US
Alaska Airlines Flight Schedule from SeaTac (SEA) to Arlington (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
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Things to Do Near DCA Airport
Columbarium
3.3 km from airportArts of Peace: Aspiration and Literature
4.4 km from airportGeneral Jose de San Martin Memorial
4.8 km from airportDaniel Webster Memorial
6.1 km from airportLieutenant General Winfield Brevet Scott Statue
6.1 km from airportAlaska Airlines Terminal Information
Departure Terminal at SeaTac (SEA):
• Terminal : Alaska Airlines operates from this terminal
Terminal 1:
• Alaska Airlines Terminal Phone: 1-800-252-7522
Arrival Terminal at Arlington (DCA):
Terminal 2:
• Alaska Airlines Terminal Phone: 1-800-252-7522
Weather & Climate at Arlington (DCA)
14.6°C
Avg Temperature96mm
Avg Rainfall10.3km/h
Avg Wind Speed68%
Avg HumidityBest Months to Visit
Challenging Months
12-Month Weather Overview
Wind Speed by Month
Humidity by Month
Best Time to Book Flights to Arlington (DCA)
Best Booking Window
Book 2-3 months in advance for best prices
Booking Tip
Avoid booking during extreme weather months for better deals
Peak Travel Months
Expect higher prices and more crowds during these months. Book early to secure better rates.
Recommended Months
These months offer the best balance of weather, prices, and availability.
Monthly Booking Recommendations
Flight Price Trends for Arlington (DCA)
Cheapest Months to Fly
Book flights during these months for the best deals and lowest prices.
Most Expensive Months
Prices are typically highest during these months. Consider booking well in advance or choosing alternative dates.
Price Trend Analysis
Prices are typically lower during shoulder seasons
Monthly Price Trends
Best Months to Fly Alaska Airlines to Arlington (DCA)
Best Months
Optimal conditions for travel with favorable weather, prices, and availability.
Shoulder Season
Transition periods with moderate conditions. Good balance of price and experience.
Challenging Months
These months may have less favorable conditions. Plan accordingly and book early.
Seasonal Insight
Best travel months: 2025-08
Seasonal Travel Calendar
Alaska Airlines Contact Information and Customer Services
Alaska Airlines Address
P.O. Box 68900
Seattle, WA 98168, USA
Customer Service Phone
+1 800 654 5669Official Website
alaskaair.com/Frequently Asked Questions
How many Alaska Airlines flights operate from Seattle (SEA) to Washington (DCA)?
Alaska Airlines operates 2 flights from Seattle (SEA) to Washington (DCA).
What city does Washington (DCA) airport serve?
Washington (DCA) airport serves Arlington, US.
How long is the Alaska Airlines flight from Seattle (SEA) to Washington (DCA)?
The flight duration is approximately 4h 56m - 5h 18m.
What is the distance from Seattle (SEA) to Washington (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.
View all Alaska Airlines flights to Seattle (SEA) →
Popular Alaska Airlines routes from Seattle include multiple destinations.
Route data verified regularly by Triposia Travel Research Team.