Route Price Intelligence
Cheap Flights From Boston to Saint Louis
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$461
Deals From
$352
Usually Costs
$352 – $461
Lowest We've Seen
$160
Based on 8,780 price pointshigh confidence
Monthly Price Guide
Jan
$461
Feb
$481
Mar
$630
Apr
$375
May
$243
Jun
$354
Jul
$376
Aug
$356
Sep
$461
Oct
$461
Nov
$471
Dec
$471
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 $243. The most expensive month tends to be March at around $630. 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: $16090 price checksWorst: $347