Route Price Intelligence
Cheap Flights From Boston to Saint Louis
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$449
Deals From
$358
Usually Costs
$358 – $461
Lowest We've Seen
$160
Based on 8,745 price pointshigh confidence
Monthly Price Guide
Jan
$461
Feb
$481
Mar
$605
Apr
$336
May
$276
Jun
$441
Jul
$386
Aug
$376
Sep
$461
Oct
$461
Nov
$471
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 $276. The most expensive month tends to be March at around $605. For the best deals, consider flying in May, April, August.
Cheapest Fare Found (Last 90 Days)
The lowest round-trip price available on each day we checked
Best: $16089 price checksWorst: $347