Route guide
Cheap Flights from Washington, DC to Seattle: Book Airline Tickets
- Distance
- about 2,300 mi
- Typical flight time
- 4 h 45 min – 5 h 45 min
- Airports
- 3 × 1
- Time difference
- 3 h behind
This page covers the practical side of flying between Washington, DC and Seattle: which airports to compare, how long the trip takes, and when it is busy. It works for either direction. For a price on your dates, ask a specialist.
Quick answer: Washington, DC to Seattle is about 2,300 miles (3,700 km) and a typical flight takes 4 h 45 min to 5 h 45 min. Seattle is 3 hours behind Washington, DC. Washington, DC has 3 airports to compare and Seattle has 1.
Airport pairs to compare
The Washington area has three airports. Reagan National is closest to the city, Dulles handles more long-haul traffic, and BWI sits between Washington and Baltimore. Seattle's airport is connected to downtown by light rail, which makes arrival simple even at busy times.
| Pair | Departure airport | Arrival airport |
|---|---|---|
| DCA to SEA | Ronald Reagan Washington National | Seattle-Tacoma International |
| IAD to SEA | Washington Dulles International | Seattle-Tacoma International |
| BWI to SEA | Baltimore/Washington International | Seattle-Tacoma International |
About the airports
- DCA · Ronald Reagan Washington National
Closest to downtown and served by Metrorail. - IAD · Washington Dulles International
Farther out in Virginia, with the larger share of long-haul flights and a Metrorail Silver Line station. - BWI · Baltimore/Washington International
Between Baltimore and Washington, often competitive on price. - SEA · Seattle-Tacoma International
Connected to downtown by Link light rail.
Airlines with a major base at either end
- At Washington, DC: United Airlines, American Airlines
- At Seattle: Delta Air Lines, Alaska Airlines
Airlines with a base at one end often connect through their hub. A specialist can compare nonstop and connecting options on your dates.
When to go and what to expect
Washington, DC
Spring is popular for cherry blossoms in late March and early April. Fall is pleasant, and summer is hot and humid.
Seattle
July through September is the driest and busiest period. From November to March it is rainy, and fares are often lower.
How long is Washington, DC to Seattle?
At about 2,300 miles, Washington, DC to Seattle is a long domestic-style flight of several hours. Meal options, seat choice and baggage rules matter more on a trip this long, so compare the full total rather than just the base fare.
Time zones and timing
Seattle is 3 hours behind Washington, DC, so you land at a local time 3 hours earlier than departure time plus flight time would suggest. Plan your arrival day around local time at the destination. Check the arrival date on any overnight itinerary, since it can differ from the departure date.
Getting between the airport and town
Washington, DC: Metrorail serves Reagan National directly and Dulles through the Silver Line, which avoids a lot of traffic.
Seattle: Link light rail runs from the airport to downtown in roughly 40 minutes.
Planning ground transport too? See our car rental guide.
Good to know
- Check every airport pairing when you compare fares. Schedules and airline options can differ between them.
- Reagan National has a perimeter rule that limits most nonstop flights to a certain distance, so longer routes often use Dulles or BWI.
- Alaska cruises depart from the city roughly from spring through early fall, which can lift demand and hotel prices at that time.
- Compare the total with bags included, not just the base fare. See baggage fees and taxes and fees.
Flying Seattle to Washington, DC?
This route guide works in both directions. For other trips, see all flights from Washington, DC or all flights from Seattle.
Frequently asked questions
How far is Washington, DC from Seattle?
The straight-line distance between the main airports is about 2,300 miles (3,700 km). Routes can be longer in practice because of air traffic and weather.
How long is a flight from Washington, DC to Seattle?
A typical scheduled flight takes roughly 4 h 45 min to 5 h 45 min in the air, depending on winds, the aircraft and the airports. Connecting itineraries take longer, and nonstop availability depends on the airline and dates.
Which airports can I use?
At Washington, DC: DCA (Ronald Reagan Washington National), IAD (Washington Dulles International), BWI (Baltimore/Washington International). At Seattle: SEA (Seattle-Tacoma International). Ask for prices on more than one pairing.
Is there a time difference?
Seattle is 3 hours behind Washington, DC.
When is the best time to fly from Washington, DC to Seattle?
In Washington, DC: Spring is popular for cherry blossoms in late March and early April. Fall is pleasant, and summer is hot and humid. In Seattle: July through September is the driest and busiest period. From November to March it is rainy, and fares are often lower. Fares are usually highest in the busy periods described for each city, so flexible dates can help.
Which airlines should I compare for Washington, DC to Seattle?
Airlines with a major base at either end include United Airlines, American Airlines, Delta Air Lines and Alaska Airlines. A specialist compares them with other carriers on your dates, since schedules and availability change.
Do you show fares on this page?
No. Fares change constantly, so we do not publish prices that might be out of date. A specialist checks live availability and confirms the full total, including taxes and bags, before you pay.
Route details updated October 18, 2026.