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
$335
Deals From
$281
Usually Costs
$281 – $347
Lowest We've Seen
$136
Based on 8,785 price pointshigh confidence
Monthly Price Guide
Jan
$335
Feb
$335
Mar
$325
Apr
$256
May
$225
Jun
$263
Jul
$314
Aug
$314
Sep
$335
Oct
$335
Nov
$346
Dec
$346
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 $225. The most expensive month tends to be December at around $346. For the best deals, consider flying in May, April, June.
Cheapest Fare Found (Last 90 Days)
The lowest round-trip price available on each day we checked
Best: $14089 price checksWorst: $293