Route Price Intelligence
Cheap Flights From Boston to Saint Louis
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$436
Deals From
$331
Usually Costs
$331 – $461
Lowest We've Seen
$160
Based on 3,521 price pointshigh confidence
Monthly Price Guide
Jan
$461
Feb
$461
Mar
$458
Apr
$422
May
$225
Jun
$321
Jul
$351
Aug
$346
Sep
$447
Oct
$461
Nov
$461
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 May, when fares average around $225. The most expensive month tends to be February at around $461. For the best deals, consider flying in May, June, August.
Cheapest Fare Found (Last 90 Days)
The lowest round-trip price available on each day we checked
Best: $16072 price checksWorst: $347