Route Price Intelligence
Cheap Flights From St. Louis to Washington Dc - Dulles
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$325
Deals From
$250
Usually Costs
$250 – $346
Lowest We've Seen
$136
Based on 4,447 price pointshigh confidence
Monthly Price Guide
Jan
$336
Feb
$336
Mar
$351
Apr
$280
May
$219
Jun
$230
Jul
$283
Aug
$284
Sep
$335
Oct
$337
Nov
$346
Dec
$348
Cheapest Average Expensive
Best Time to Fly from St. Louis to Washington Dc - Dulles
The cheapest time to fly from St. Louis to Washington Dc - Dulles is typically May, when fares average around $219. The most expensive month tends to be March at around $351. For the best deals, consider flying in May, June, April.
Cheapest Fare Found (Last 90 Days)
The lowest round-trip price available on each day we checked
Best: $14075 price checksWorst: $293