Cheap Flights from Washington, D.C. to Seattle
No deal from Washington, D.C. to Seattle has cleared our price bar yet. What we have seen on the route is below.
Across 3 months of observations from Washington, D.C. to Seattle, the lowest round-trip fare we recorded was $173, in August. The typical fare was $314. August was the cheapest month we saw and October the dearest.
The most recent price we saw on this route was $369 on Frontier, seen Oct 16. It is an unverified observation and may have changed.
See every deal <a href="/from/washington-dc">from Washington, D.C.</a>, <a href="/to/seattle">to Seattle</a>, or the return direction <a href="/from/seattle/to/washington-dc">Seattle to Washington, D.C.</a>.
Latest price we saw: Washington, D.C. to Seattle
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| Washington, D.C. (DCA) to Seattle (SEA) | $369 | 7.9¢ | Nov 9 – Nov 18 | Frontier | Oct 16 | Check price |
Price history: Washington, D.C. to Seattle
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $237 | $281 | 10 |
| Sep 2026 | $173 | $310 | 52 |
| Aug 2026 | $173 | $350 | 399 |
Frequently asked questions
How many flight deals from Washington, D.C. to Seattle are on Sparkflights right now?
There are 0 verified deals from Washington, D.C. to Seattle on the board right now. The list refreshes hourly.
What is the lowest price ever seen from Washington, D.C. to Seattle?
The lowest fare we've recorded from Washington, D.C. to Seattle is $173, based on 461 price observations over 3 months.
How much does a flight from Washington, D.C. to Seattle cost?
The typical round-trip fare we observed from Washington, D.C. to Seattle is $314, against a recorded low of $173. These are observations, not quotes.
When is the cheapest month to fly Washington, D.C. to Seattle?
August was the cheapest month we observed from Washington, D.C. to Seattle and October the dearest, over 3 months of data.
What is the current price from Washington, D.C. to Seattle?
The most recent fare our sweep saw from Washington, D.C. to Seattle is $369, on Oct 16. It is an unverified observation rather than a verified deal, so check it before booking.