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
$315
Deals From
$293
Usually Costs
$293 – $346
Lowest We've Seen
$136
Based on 8,407 price pointshigh confidence
Monthly Price Guide
Jan
$380
Feb
$308
Mar
$285
Apr
$276
May
$315
Jun
$326
Jul
$315
Aug
$315
Sep
$315
Oct
$316
Nov
$326
Dec
$334
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 April, when fares average around $276. The most expensive month tends to be January at around $380. For the best deals, consider flying in April, March, February.
Cheapest Fare Found (Last 90 Days)
The lowest round-trip price available on each day we checked
Best: $13658 price checksWorst: $242