Cheap Flights From Denver Intl. (DEN) To Los Angeles - Ontario Intl. (ONT)

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Cheapest Flights from Denver (DEN) to Ontario (ONT)

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were CA $548 round trip and CA $210 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Oct 18 - Mon, Oct 20
DEN
Denver
ONT
Ontario
CA $548 Roundtrip, found 1 day ago
CA $548
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 18 from Denver to Ontario, returning Mon, Oct 20, priced at CA $548 found 1 day ago
Sat, Oct 18 - Mon, Oct 20
DEN
Denver
ONT
Ontario
CA $566 Roundtrip, found 1 day ago
CA $566
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 18 from Denver to Ontario, returning Mon, Oct 20, priced at CA $566 found 1 day ago
Sat, Oct 18 - Mon, Oct 20
DEN
Denver
ONT
Ontario
CA $580 Roundtrip, found 1 day ago
CA $580
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 18 from Denver to Ontario, returning Mon, Oct 20, priced at CA $580 found 1 day ago
Sat, Oct 18 - Mon, Oct 20
DEN
Denver
ONT
Ontario
CA $613 Roundtrip, found 1 day ago
CA $613
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Sat, Oct 18 from Denver to Ontario, returning Mon, Oct 20, priced at CA $613 found 1 day ago
Sat, Oct 18 - Mon, Oct 20
DEN
Denver
ONT
Ontario
CA $630 Roundtrip, found 1 day ago
CA $630
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Sat, Oct 18 from Denver to Ontario, returning Mon, Oct 20, priced at CA $630 found 1 day ago
Sat, Oct 18 - Mon, Oct 20
DEN
Denver
ONT
Ontario
CA $664 Roundtrip, found 1 day ago
CA $664
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Sat, Oct 18 from Denver to Ontario, returning Mon, Oct 20, priced at CA $664 found 1 day ago
Sat, Oct 18 - Mon, Oct 20
DEN
Denver
ONT
Ontario
CA $690 Roundtrip, found 1 day ago
CA $690
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Sat, Oct 18 from Denver to Ontario, returning Mon, Oct 20, priced at CA $690 found 1 day ago
Sat, Oct 18 - Mon, Oct 20
DEN
Denver
ONT
Ontario
CA $728 Roundtrip, found 1 day ago
CA $728
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Sat, Oct 18 from Denver to Ontario, returning Mon, Oct 20, priced at CA $728 found 1 day ago
Thu, Sep 18 - Fri, Sep 19
DEN
Denver
ONT
Ontario
CA $961 Roundtrip, found 1 day ago
CA $961
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Sep 18 from Denver to Ontario, returning Fri, Sep 19, priced at CA $961 found 1 day ago
Thu, Sep 18 - Fri, Sep 19
DEN
Denver
ONT
Ontario
CA $982 Roundtrip, found 1 day ago
CA $982
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Thu, Sep 18 from Denver to Ontario, returning Fri, Sep 19, priced at CA $982 found 1 day ago

Frequently asked questions

Are there direct flights from DEN to Los Angeles - Ontario Intl. Airport (ONT)?
Begin your getaway in the most stress-free way possible and head straight to Los Angeles - Ontario Intl. Airport (ONT) from DEN. Southwest Airlines and United Airlines are among the airlines that offer direct services on this route.
What airlines fly from Denver Intl. Airport (DEN) to Ontario Airport?
Choose from a number of airlines offering direct flights between Denver and Ontario. Southwest Airlines (WN) is one of the most popular. This carrier offers 86 flights each month. If you want more options, have a look at the deals on offer from United Airlines (UA). This carrier operates 60 flights every month. Between the two, we're sure you'll find a deal to suit your travel needs.
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 Denver (DEN)

Travelers at DEN love to visit these top cities. Roam to the top destinations from Denver (DEN) 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.