Route Price Intelligence
Cheap Flights From Seattle to Ontario
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$280
Deals From
$229
Usually Costs
$229 – $317
Lowest We've Seen
$88
Based on 8,605 price pointshigh confidence
Monthly Price Guide
Jan
$317
Feb
$317
Mar
$340
Apr
$201
May
$187
Jun
$230
Jul
$244
Aug
$248
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 $187. The most expensive month tends to be March at around $340. For the best deals, consider flying in May, April, June.
Cheapest Fare Found (Last 90 Days)
The lowest round-trip price available on each day we checked
Best: $8889 price checksWorst: $200