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
$247
Usually Costs
$247 – $346
Lowest We've Seen
$136
Based on 271 price pointshigh confidence
Monthly Price Guide
Jan
$336
Feb
—
Mar
—
Apr
$356
May
$228
Jun
$230
Jul
$250
Aug
$250
Sep
$335
Oct
$335
Nov
$346
Dec
$357
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 $228. The most expensive month tends to be December at around $357. For the best deals, consider flying in May, June, July.
Cheapest Fare Found (Last 90 Days)
The lowest round-trip price available on each day we checked
Best: $14071 price checksWorst: $293