← Seattle to Ontario: all datesSee all →
One way
Seattle to Ontario 🇺🇸
$86
- Departs
- Sun, Nov 22
- Return
- —
- Stops
- Direct
- Airline
- Frontier Airlines
- Duration
- 2h 48m
Check this fare →Affiliate link — we may earn a commission, at no extra cost to you. How we make money
Fare expires in --:--:--
Other dates on this route
Cheapest one-way fare by departure day Cheap Average Pricey
November 2026
SMTWTFS1234567891011121314151617
Work-hours calculator
This flight to Ontario costs you 5h 44m of work.
Also cheap
More from Seattle
Deal alerts
Never miss a price drop
One short email when a fare drops well below its usual price. Follow as many cities as you like. No spam, unsubscribe anytime.
Prices come from fares travellers found in the last few days and can change at any time. Last updated Fri, 23 Oct 2026 06:59:53 GMT.
