Direct (nonstop) flights from Washington to Seattle
2 airlines fly nonstop from Ronald Reagan Washington National (DCA) to Seattle Tacoma International (SEA). It's 2,328 miles (3,746 km), about 6h 1m in the air. Operated by Alaska Airlines, Delta Air Lines.
Alaska Airlines
Delta Air Lines
Route data last updated: May 28, 2026
Airlines with non-stop flights
AS
Alaska Airlines
DL
Delta Air Lines
Alternative Routes
Other ways to fly from Washington to Seattle with one stop · direct emits 393 kg CO₂ per passenger
Looking for the return flight?
SEA → DCA: Flights from Seattle to WashingtonOther direct flights from Washington
Direct flights from Seattle (SEA)
Frequently Asked Questions
How long is the direct flight from Washington to Seattle?
A nonstop flight from Washington (DCA) to Seattle (SEA) takes approximately 6 hours and 1 minutes. The distance is 2,328 miles (3,746 km).
Which airlines fly nonstop from Washington to Seattle?
2 airlines: Alaska Airlines, Delta Air Lines.
Is there a nonstop flight from Washington to Seattle?
Yes. 2 airlines: Alaska Airlines, Delta Air Lines.
How far is Washington from Seattle?
The flight distance from Washington to Seattle is 2,328 miles (3,746 km), measured as the great-circle (shortest air) distance. That's roughly the same distance as New York to Los Angeles.
What type of aircraft flies from Washington to Seattle?
At 6h 1m, this route typically uses wide-body aircraft — Boeing 777, 787, or Airbus A330/A350. Varies by airline.
What is the carbon footprint of a flight from Washington to Seattle?
Roughly 393 kg CO2 per passenger one-way. That's about the same as driving 1,965 km.
Is the return flight from Seattle to Washington also nonstop?
Yes — nonstop flights run both ways. Flight time may differ slightly due to wind patterns.
When is the cheapest time to fly from Washington to Seattle?
Midweek flights (Tue/Wed) outside holiday peaks are usually cheapest. 3-6 weeks ahead is a good window for this route. Use "Check Prices" above to compare.
How early should I arrive at Ronald Reagan Washington National for this flight?
1.5-2 hours for domestic. Add more time during holidays or busy travel weekends.