Cheap Flights From Seattle - Tacoma Intl. (SEA) To Los Angeles - Ontario Intl. (ONT)

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Cheapest Flights from Seattle (SEA) to Ontario (ONT)

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were CA $187 round trip and CA $125 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Aug. 20 - Tue, Aug. 26
SEA
Seattle
ONT
Ontario
CA $187 Roundtrip, found 2 days ago
CA $187
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Wed, Aug. 20 from Seattle to Ontario, returning Tue, Aug. 26, priced at CA $187 found 2 days ago
Sat, Sep. 27 - Sat, Oct. 4
SEA
Seattle
ONT
Ontario
CA $189 Roundtrip, found 4 days ago
CA $189
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, Sep. 27 from Seattle to Ontario, returning Sat, Oct. 4, priced at CA $189 found 4 days ago
Sat, Sep. 13 - Tue, Sep. 16
SEA
Seattle
ONT
Ontario
CA $190 Roundtrip, found 5 days ago
CA $190
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Sep. 13 from Seattle to Ontario, returning Tue, Sep. 16, priced at CA $190 found 5 days ago
Tue, Aug. 19 - Tue, Aug. 26
SEA
Seattle
ONT
Ontario
CA $190 Roundtrip, found 2 days ago
CA $190
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Tue, Aug. 19 from Seattle to Ontario, returning Tue, Aug. 26, priced at CA $190 found 2 days ago
Wed, Aug. 20 - Wed, Aug. 27
SEA
Seattle
ONT
Ontario
CA $214 Roundtrip, found 3 days ago
CA $214
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Wed, Aug. 20 from Seattle to Ontario, returning Wed, Aug. 27, priced at CA $214 found 3 days ago
Wed, Aug. 20 - Mon, Aug. 25
SEA
Seattle
ONT
Ontario
CA $228 Roundtrip, found 2 days ago
CA $228
Roundtrip
found 2 days ago
Select Hawaiian Airlines flight, departing Wed, Aug. 20 from Seattle to Ontario, returning Mon, Aug. 25, priced at CA $228 found 2 days ago
Mon, Sep. 8 - Sat, Sep. 13
SEA
Seattle
ONT
Ontario
CA $230 Roundtrip, found 5 days ago
CA $230
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Mon, Sep. 8 from Seattle to Ontario, returning Sat, Sep. 13, priced at CA $230 found 5 days ago
Sat, Aug. 23 - Sun, Aug. 24
SEA
Seattle
ONT
Ontario
CA $231 Roundtrip, found 4 days ago
CA $231
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Sat, Aug. 23 from Seattle to Ontario, returning Sun, Aug. 24, priced at CA $231 found 4 days ago
Wed, Aug. 20 - Wed, Aug. 27
SEA
Seattle
ONT
Ontario
CA $236 Roundtrip, found 3 days ago
CA $236
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Wed, Aug. 20 from Seattle to Ontario, returning Wed, Aug. 27, priced at CA $236 found 3 days ago
Tue, Aug. 19 - Tue, Aug. 19
SEA
Seattle
ONT
Ontario
CA $237 Roundtrip, found 2 days ago
CA $237
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Tue, Aug. 19 from Seattle to Ontario, returning Tue, Aug. 19, priced at CA $237 found 2 days ago

Frequently asked questions

Are there direct flights from Sea-Tac Airport to Ontario Airport?
If you'd love to travel from Seattle - Tacoma Intl. Airport (SEA) to Los Angeles - Ontario Intl. Airport (ONT) as quickly as possible, you'll be happy to know multiple airlines operate direct flights. Choose your favorite seat with Alaska Airlines or Delta.
What airlines fly from Sea-Tac Airport to Los Angeles - Ontario Intl. Airport (ONT)?
If you're planning a trip to Ontario from Seattle, there are a few airlines offering direct flights. One of the top carriers is Alaska Airlines (AS), which operates 108 flights every month. You'll want to also check out the deals available through Delta (DL). Another popular airline, it operates 91 flights every month on the Seattle to Ontario route. Be sure to compare the two airlines to find your perfect fare.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.

Popular Flight Routes from Seattle (SEA)

Travelers at SEA love to visit these top cities. Roam to the top destinations from Seattle (SEA) today with the cheap prices from Travelocity!

Popular Flight Routes from Ontario (ONT)

Travelers at ONT love to visit these top cities. Roam to the top destinations from Ontario(ONT) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.