Cheap flights from Washington, D.C. to Seattle from R3 267

The cheapest month to fly to Seattle from Washington, D.C. is in February. Flight prices, which tend to average around R4 597, are often lower during this time because this is during the off-season. If you aren’t able to travel to Seattle during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of R4 630.

Fly from Washington, D.C. Reagan-National to Seattle/Tacoma Intl for the best Washington, D.C. - Seattle/Tacoma Intl flight prices

You are more likely to see cheaper flights to Seattle from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around R6 568 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Washington, D.C. for as low as R5 910 on momondo.

There are 2 cabin classes available to choose from on Washington, D.C. to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 14% on your flight if you consider stops on a Washington, D.C. to Seattle flight.

As of September 2026, prices for Washington, D.C. to Seattle flights are approximately 25% cheaper when compared to flights at the same time last year.

As of September 2026, 18 flights take off from Washington, D.C. and land in Seattle each day. The most common flight departure time for this route is 17:00, with 51% of daily flights taking off at midday.

As of September 2026, 132 flights take off from Washington, D.C. and land in Seattle each week. The most common flight departure day for this route is Tue, with 25% of weekly flights taking off on this day.