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 $711 round trip and CA $404 one way. Prices and availability subject to change. Additional terms may apply.

Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $711 Roundtrip, found 3 days ago
CA $711
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $711 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $783 Roundtrip, found 3 days ago
CA $783
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $783 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $811 Roundtrip, found 3 days ago
CA $811
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $811 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $814 Roundtrip, found 3 days ago
CA $814
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $814 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $821 Roundtrip, found 3 days ago
CA $821
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $821 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $850 Roundtrip, found 3 days ago
CA $850
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $850 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $893 Roundtrip, found 3 days ago
CA $893
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $893 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $921 Roundtrip, found 3 days ago
CA $921
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $921 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $925 Roundtrip, found 3 days ago
CA $925
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $925 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $952 Roundtrip, found 3 days ago
CA $952
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $952 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $963 Roundtrip, found 3 days ago
CA $963
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $963 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $1,031 Roundtrip, found 3 days ago
CA $1,031
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $1,031 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $1,034 Roundtrip, found 3 days ago
CA $1,034
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $1,034 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $1,059 Roundtrip, found 3 days ago
CA $1,059
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $1,059 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $1,061 Roundtrip, found 3 days ago
CA $1,061
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $1,061 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $1,130 Roundtrip, found 3 days ago
CA $1,130
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $1,130 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $1,157 Roundtrip, found 3 days ago
CA $1,157
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $1,157 found 3 days ago
Thu, May 14 - Sun, May 17
DEN
Denver
ONT
Ontario
CA $1,160 Roundtrip, found 3 days ago
CA $1,160
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, May 14 from Denver to Ontario, returning Sun, May 17, priced at CA $1,160 found 3 days 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.

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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.