Seattle to Ontario 🇺🇸
Cheapest fare
$82
Fastest
2h 48m
Direct from
$82
Dates tracked
5
Cheapest fare
$82
Tue, Nov 24 · Direct · 2h 48m · Frontier Airlines
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Price calendar
Cheapest one-way fare by departure day Cheap Average Pricey
November 2026
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Price trend
Price alert
Cheapest day to fly
Saturday
Averages $79, vs $86 on Sundays.
Work-hours calculator
This flight to Ontario costs you 5h 28m of work.
Same money as
1
SUV fuel tanks
5
large pizzas
6
cinema tickets
14
fancy coffees
Airlines on this route
Frontier Airlines
from $82 · 5 dates
Destination guide
Discover Ontario
About Ontario
Ontario is a city in southwestern San Bernardino County, California, United States, 35 miles (56 km) east of downtown Los Angeles and 23 miles (37 km) west of downtown San Bernardino, the county seat. Located in the western part of the Inland Empire metropolitan area, it lies just east of Los Angeles County and is part of the Los Angeles metropolitan area. As of the 2020 census, the city had a population of 175,265.
Text from Wikipedia — Ontario, California, licensed CC BY-SA 4.0.
All dates
Every fare, by date
| Departs | Return | Airline | Stops | Price |
|---|---|---|---|---|
| Sat, Nov 21 | One way | Frontier Airlines | Direct | $86 |
| Sat, Nov 21 | Sun, Nov 22 | Frontier Airlines | Direct | $176 |
| Sun, Nov 22 | One way | Frontier Airlines | Direct | $86 |
| Tue, Nov 24 | One way | Frontier Airlines | Direct | $82 |
| Mon, Nov 30 | Sat, Dec 12 | Frontier Airlines |
Also cheap
More from Seattle
FAQ
Seattle to Ontario: answers
How much is a flight from Seattle to Ontario?+
The cheapest fare we see right now is $82 one way on Tue, Nov 24 with Frontier Airlines.
Are there direct flights from Seattle to Ontario?+
Yes — direct fares start from $82.
How long is the flight from Seattle to Ontario?+
The fastest itinerary we track takes about 2h 48m door to door.
What is the cheapest day to fly to Ontario?+
Saturday departures are the cheapest on average right now, Sunday the most expensive.
