Route Price Intelligence
Cheap Flights From Boston to Saint Louis
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$441
Deals From
$353
Usually Costs
$353 – $441
Lowest We've Seen
$179
Based on 7,866 price pointshigh confidence
Monthly Price Guide
Jan
$516
Feb
$378
Mar
$354
Apr
$302
May
$378
Jun
$441
Jul
$441
Aug
$439
Sep
$439
Oct
$441
Nov
$448
Dec
$461
Cheapest Average Expensive
Best Time to Fly from Boston to Saint Louis
The cheapest time to fly from Boston to Saint Louis is typically April, when fares average around $302. The most expensive month tends to be January at around $516. 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: $17962 price checksWorst: $347