Route Price Intelligence
Cheap Flights From Boston to Saint Louis
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$341
Great Deal
Under $300
Typical Range
$300 – $446
Lowest We've Seen
$160
Based on 271 price pointshigh confidence
Monthly Price Guide
Jan
$446
Feb
$446
Mar
$454
Apr
—
May
—
Jun
$362
Jul
$278
Aug
$270
Sep
$314
Oct
$313
Nov
$359
Dec
$446
Cheapest Average Expensive
Best Time to Fly from Boston to Saint Louis
The cheapest time to fly from Boston to Saint Louis is typically August, when fares average around $270. The most expensive month tends to be March at around $454. For the best deals, consider flying in August, July, October.
Typical Price by Travel Month
Median round-trip fare for each month, with the typical price range, from our ongoing tracking of this route
Cheapest month: August40,620 fares analyzedTypical low: $407