$34 Cheap flights from Los Angeles - Ontario Intl. to Denver Intl. (ONT to DEN)

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Find The Best Dates To Fly from Los Angeles - Ontario Intl. to Denver Intl.

Amazing ONT to DEN Flight Deals

The cheapest flights to Denver Intl. found within the past 7 days were $53 round trip and $34 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Jun 4 - Wed, Jun 19
ONT
Ontario
DEN
Denver
$53 Roundtrip, found 1 day ago
$53
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Jun 4 from Ontario to Denver, returning Wed, Jun 19, priced at $53 found 1 day ago
Wed, May 15 - Tue, May 28
ONT
Ontario
DEN
Denver
$61 Roundtrip, found 2 days ago
$61
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, May 15 from Ontario to Denver, returning Tue, May 28, priced at $61 found 2 days ago
Tue, May 7 - Sat, May 11
ONT
Ontario
DEN
Denver
$62 Roundtrip, found 2 days ago
$62
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Tue, May 7 from Ontario to Denver, returning Sat, May 11, priced at $62 found 2 days ago
Tue, Jun 4 - Wed, Jun 5
ONT
Ontario
DEN
Denver
$65 Roundtrip, found 3 days ago
$65
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Tue, Jun 4 from Ontario to Denver, returning Wed, Jun 5, priced at $65 found 3 days ago
Tue, May 14 - Tue, May 21
ONT
Ontario
DEN
Denver
$68 Roundtrip, found 5 hours ago
$68
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Tue, May 14 from Ontario to Denver, returning Tue, May 21, priced at $68 found 5 hours ago
Wed, May 8 - Tue, May 14
ONT
Ontario
DEN
Denver
$69 Roundtrip, found 2 hours ago
$69
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Wed, May 8 from Ontario to Denver, returning Tue, May 14, priced at $69 found 2 hours ago
Wed, May 8 - Sat, May 11
ONT
Ontario
DEN
Denver
$70 Roundtrip, found 1 day ago
$70
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, May 8 from Ontario to Denver, returning Sat, May 11, priced at $70 found 1 day ago
Mon, May 20 - Wed, May 22
ONT
Ontario
DEN
Denver
$72 Roundtrip, found 2 days ago
$72
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Mon, May 20 from Ontario to Denver, returning Wed, May 22, priced at $72 found 2 days ago
Sat, May 18 - Tue, May 21
ONT
Ontario
DEN
Denver
$76 Roundtrip, found 5 hours ago
$76
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Sat, May 18 from Ontario to Denver, returning Tue, May 21, priced at $76 found 5 hours ago
Tue, May 7 - Wed, May 15
ONT
Ontario
DEN
Denver
$77 Roundtrip, found 4 hours ago
$77
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Tue, May 7 from Ontario to Denver, returning Wed, May 15, priced at $77 found 4 hours ago

Flight Schedule for ONT to DEN

CarrierFlightDepart ONTArrive DENFri
4/26		Sat
4/27		Sun
4/28		Mon
4/29		Tue
4/30		Wed
5/1		Thu
5/2		Stops
F9126200:56 am04:20 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
UA273005:15 am08:34 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
-
0 Stops
UA263806:00 am04:40 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
-
2 Stops
F9150007:16 am10:36 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
UA268201:36 pm04:56 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
-
0 Stops
UA246205:15 am08:34 am
-
-
-
-
-
-
Check Fare
0 Stops
UA244401:36 pm04:56 pm
-
-
-
-
-
-
Check Fare
0 Stops

Best Denver Intl. Flight and Hotel Packages

Denver Intl. flight + hotel packages - economy flights

Prices and availability subject to change. Additional terms may apply.
DoubleTree by Hilton Hotel Denver

DoubleTree by Hilton Hotel Denver

4 out of 5
Save 100% on your flight
per person
Jun 13 - Jun 17
Roundtrip flight included
Ontario (ONT) to Denver (DEN)
The Benson Hotel & Faculty Club

The Benson Hotel & Faculty Club

4 out of 5
Save 100% on your flight
per person
Jun 13 - Jun 17
Roundtrip flight included
Ontario (ONT) to Denver (DEN)
The Brown Palace Hotel and Spa, Autograph Collection

The Brown Palace Hotel and Spa, Autograph Collection

4.5 out of 5
Save 100% on your flight
per person
Jun 13 - Jun 17
Roundtrip flight included
Ontario (ONT) to Denver (DEN)
Renaissance Denver Central Park Hotel

Renaissance Denver Central Park Hotel

4 out of 5
Save 100% on your flight
per person
Jun 13 - Jun 17
Roundtrip flight included
Ontario (ONT) to Denver (DEN)
Denver Marriott Tech Center

Denver Marriott Tech Center

4 out of 5
Save 100% on your flight
per person
Jun 13 - Jun 17
Roundtrip flight included
Ontario (ONT) to Denver (DEN)
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Frequently asked questions

Are there direct flights from ONT to Denver Airport?
Sometimes, it’s the journey that counts; sometimes the magic is in the destination. If you’re keen to get to your destination fast, multiple airlines operate direct flights from Ontario Airport to Denver Airport, including Southwest Airlines and United Airlines.
How long is the flight from Los Angeles - Ontario Intl. Airport (ONT) to DEN?
You’ll have just enough time to breeze through a couple chapters in that gripping novel as the journey from ONT to Denver Airport is only 2 hours and 16 minutes. You could find yourself left on a cliffhanger!
What is the flight distance from Los Angeles - Ontario Intl. Airport (ONT) to Denver Airport?
With a flight distance of only 820 mi, a magazine or two or a few episodes of your favorite TV show is all you’ll need to keep yourself entertained on the journey between ONT and Denver Airport. You’ll be hopping off the plane and diving into your fun adventures before long.
What airlines fly from ONT to Denver Intl. Airport (DEN)?
There are a few airlines advertising direct flights from Los Angeles - Ontario Intl. Airport (ONT) to Denver Airport. Southwest Airlines (WN) is among the best of them, operating at least 86 flights each month. You may want to also look into the deals on offer from United Airlines (UA). Another leading airline, it operates 60 flights every month on the Ontario to Denver route. Compare the two to score the best fare.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity 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 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

 

Traveling From
Los Angeles - Ontario Intl.
Traveling To
Denver Intl.
Shortest Flight Time
2 hours 5 mins
Earliest Departure Time
12:59AM PDT
Latest Departure Time
3:30PM PDT
Lowest Flight Price
$53

Route Info

Flight path for flights from LA/Ontario International Airport to Denver International Airport


Origin:
ONT - LA/Ontario International Airport
Destination:
DEN - Denver International Airport
Distance:
931.00 miles


Airlines & Aircraft Used on ONT to DEN Flight Routes


Airline Carrier
Aircraft
American Airlines
Airbus A320-100/200

Discover our best flights from Ontario ONT to Denver DEN. 

With 20 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

 

Find our best return flights from Ontario ONT to Denver DEN at the right price  

Airfares to Denver DEN from Ontario ONT currently cost between $53 and $77. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way flights from Ontario ONT to Denver DEN 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from Ontario ONT to Denver DEN on Travelocity starting at $34. Prices and availability subject to change. Additional terms may apply. 

 

Get to Denver DEN from Ontario ONT quicker with direct flights. 

Get to Denver faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to DEN from ONT to take around 2 hour(s) 5 min(s).  

 

Find our cheapest airfares for flights from Ontario ONT to Denver DEN

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to DEN from ONT. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

 

Get our best airfare deals for your flight from Ontario ONT to Denver DEN today 

If you’re flexible about when you travel, June is usually the cheapest month to fly from Ontario ONT to Denver DEN. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

 

Book flexible airline tickets for flights to Denver DEN from Ontario ONT 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to DEN from ONT have this option.  

 

Travel with confidence when you book flights to Denver DEN from Ontario ONT with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving. 

*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.