Route Price Intelligence
Cheap Flights From St. Louis to Ontario
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$455
Deals From
$330
Usually Costs
$330 – $477
Lowest We've Seen
$145
Based on 5,708 price pointshigh confidence
Monthly Price Guide
Jan
$477
Feb
$497
Mar
$327
Apr
$260
May
$250
Jun
$411
Jul
$449
Aug
$449
Sep
$477
Oct
$477
Nov
$477
Dec
$477
Cheapest Average Expensive
Best Time to Fly from St. Louis to Ontario
The cheapest time to fly from St. Louis to Ontario is typically May, when fares average around $250. The most expensive month tends to be February at around $497. For the best deals, consider flying in May, April, March.
Cheapest Fare Found (Last 90 Days)
The lowest round-trip price available on each day we checked
Best: $14577 price checksWorst: $432