Route Price Intelligence
Cheap Flights From Seattle to Ontario
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$290
Deals From
$219
Usually Costs
$219 – $317
Lowest We've Seen
$88
Based on 3,372 price pointshigh confidence
Monthly Price Guide
Jan
$317
Feb
$317
Mar
$317
Apr
$215
May
$180
Jun
$204
Jul
$230
Aug
$238
Sep
$317
Oct
$317
Nov
$317
Dec
$317
Cheapest Average Expensive
Best Time to Fly from Seattle to Ontario
The cheapest time to fly from Seattle to Ontario is typically May, when fares average around $180. The most expensive month tends to be September at around $317. For the best deals, consider flying in May, June, April.
Cheapest Fare Found (Last 90 Days)
The lowest round-trip price available on each day we checked
Best: $8872 price checksWorst: $200