Route Price Intelligence
Cheap Flights From St. Louis to Ontario
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$346
Great Deal
Under $284
Typical Range
$284 – $440
Lowest We've Seen
$145
Based on 242 price pointshigh confidence
Monthly Price Guide
Jan
$440
Feb
$440
Mar
$440
Apr
$440
May
—
Jun
—
Jul
$359
Aug
$290
Sep
$276
Oct
$270
Nov
$340
Dec
$440
Cheapest Average Expensive
Best Time to Fly from St. Louis to Ontario
The cheapest time to fly from St. Louis to Ontario is typically October, when fares average around $270. The most expensive month tends to be April at around $440. For the best deals, consider flying in October, September, August.
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: July18,651 fares analyzedTypical low: $437