Route Price Intelligence
Cheap Flights From Seattle to Washington Dc - Dulles
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$352
Deals From
$300
Usually Costs
$300 – $397
Lowest We've Seen
$159
Based on 4,154 price pointshigh confidence
Monthly Price Guide
Jan
$375
Feb
$387
Mar
$397
Apr
$598
May
$337
Jun
$284
Jul
$339
Aug
$280
Sep
$265
Oct
$352
Nov
$390
Dec
$407
Cheapest Average Expensive
Best Time to Fly from Seattle to Washington Dc - Dulles
The cheapest time to fly from Seattle to Washington Dc - Dulles is typically September, when fares average around $265. The most expensive month tends to be April at around $598. For the best deals, consider flying in September, August, June.
Cheapest Fare Found (Last 90 Days)
The lowest round-trip price available on each day we checked
Best: $15975 price checksWorst: $250