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 $386 round trip and CA $173 one way. Prices and availability subject to change. Additional terms may apply.

Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $386 Roundtrip, found 14 hours ago
CA $386
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $386 found 14 hours ago
Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $395 Roundtrip, found 14 hours ago
CA $395
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $395 found 14 hours ago
Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $433 Roundtrip, found 14 hours ago
CA $433
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $433 found 14 hours ago
Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $442 Roundtrip, found 14 hours ago
CA $442
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $442 found 14 hours ago
Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $446 Roundtrip, found 14 hours ago
CA $446
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $446 found 14 hours ago
Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $469 Roundtrip, found 14 hours ago
CA $469
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $469 found 14 hours ago
Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $471 Roundtrip, found 14 hours ago
CA $471
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $471 found 14 hours ago
Mon, May 11 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $473 Roundtrip, found 14 hours ago
CA $473
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Mon, May 11 from Denver to Ontario, returning Mon, May 18, priced at CA $473 found 14 hours ago
Mon, May 11 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $475 Roundtrip, found 14 hours ago
CA $475
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Mon, May 11 from Denver to Ontario, returning Mon, May 18, priced at CA $475 found 14 hours ago
Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $485 Roundtrip, found 14 hours ago
CA $485
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $485 found 14 hours ago
Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $493 Roundtrip, found 14 hours ago
CA $493
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $493 found 14 hours ago
Mon, May 11 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $501 Roundtrip, found 14 hours ago
CA $501
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Mon, May 11 from Denver to Ontario, returning Mon, May 18, priced at CA $501 found 14 hours ago
Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $507 Roundtrip, found 14 hours ago
CA $507
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $507 found 14 hours ago
Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $511 Roundtrip, found 14 hours ago
CA $511
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $511 found 14 hours ago
Thu, May 14 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $516 Roundtrip, found 14 hours ago
CA $516
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Mon, May 18, priced at CA $516 found 14 hours ago
Mon, May 11 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $518 Roundtrip, found 14 hours ago
CA $518
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Mon, May 11 from Denver to Ontario, returning Mon, May 18, priced at CA $518 found 14 hours ago
Mon, May 11 - Mon, May 18
DEN
Denver
ONT
Ontario
CA $520 Roundtrip, found 14 hours ago
CA $520
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Mon, May 11 from Denver to Ontario, returning Mon, May 18, priced at CA $520 found 14 hours 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.