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 $135 round trip and CA $110 one way. Prices and availability subject to change. Additional terms may apply.

Sun, May 10 - Sat, May 16
SEA
Seattle
ONT
Ontario
CA $135 Roundtrip, found 5 days ago
CA $135
Roundtrip
found 5 days ago
Select Delta flight, departing Sun, May 10 from Seattle to Ontario, returning Sat, May 16, priced at CA $135 found 5 days ago
Mon, May 11 - Sat, May 16
SEA
Seattle
ONT
Ontario
CA $136 Roundtrip, found 5 days ago
CA $136
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, May 11 from Seattle to Ontario, returning Sat, May 16, priced at CA $136 found 5 days ago
Wed, May 6 - Sat, May 16
SEA
Seattle
ONT
Ontario
CA $138 Roundtrip, found 5 days ago
CA $138
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, May 6 from Seattle to Ontario, returning Sat, May 16, priced at CA $138 found 5 days ago
Mon, May 4 - Sat, May 16
SEA
Seattle
ONT
Ontario
CA $139 Roundtrip, found 5 days ago
CA $139
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, May 4 from Seattle to Ontario, returning Sat, May 16, priced at CA $139 found 5 days ago
Sun, May 10 - Thu, May 14
SEA
Seattle
ONT
Ontario
CA $190 Roundtrip, found 5 days ago
CA $190
Roundtrip
found 5 days ago
Select Delta flight, departing Sun, May 10 from Seattle to Ontario, returning Thu, May 14, priced at CA $190 found 5 days ago
Mon, May 11 - Thu, May 14
SEA
Seattle
ONT
Ontario
CA $191 Roundtrip, found 5 days ago
CA $191
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, May 11 from Seattle to Ontario, returning Thu, May 14, priced at CA $191 found 5 days ago
Fri, Apr 24 - Tue, Apr 28
SEA
Seattle
ONT
Ontario
CA $227 Roundtrip, found 4 days ago
CA $227
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Fri, Apr 24 from Seattle to Ontario, returning Tue, Apr 28, priced at CA $227 found 4 days ago
Fri, May 8 - Sun, May 10
SEA
Seattle
ONT
Ontario
CA $234 Roundtrip, found 12 hours ago
CA $234
Roundtrip
found 12 hours ago
Select Alaska Airlines flight, departing Fri, May 8 from Seattle to Ontario, returning Sun, May 10, priced at CA $234 found 12 hours ago
Thu, Apr 30 - Mon, May 4
SEA
Seattle
ONT
Ontario
CA $234 Roundtrip, found 5 days ago
CA $234
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Apr 30 from Seattle to Ontario, returning Mon, May 4, priced at CA $234 found 5 days ago
Thu, Apr 30 - Mon, May 4
SEA
Seattle
ONT
Ontario
CA $242 Roundtrip, found 5 days ago
CA $242
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Apr 30 from Seattle to Ontario, returning Mon, May 4, priced at CA $242 found 5 days ago

Los Angeles - Ontario Intl. flight + hotel packages - economy flights

Price found within the past 48 hours. Click for updated prices.
Silver Pines Lodge

Silver Pines Lodge

2 out of 5
Price was CA $637, price is now CA $572 per person
CA $572
per person
Apr 25 - Apr 28
found 1 day ago
Roundtrip flight included
Seattle (SEA) to Ontario (ONT)
Holiday Inn Express & Suites Beaumont - Oak Valley by IHG

Holiday Inn Express & Suites Beaumont - Oak Valley by IHG

2.5 out of 5
Price was CA $703, price is now CA $657 per person
CA $657
per person
Apr 18 - Apr 21
found 1 day ago
Roundtrip flight included
Seattle (SEA) to Ontario (ONT)
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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.

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*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.