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Cheap flights from Denver to Ontario from $28

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Ontario departing on 1/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Denver to Los Angeles

Cheap round-trip flights

These are some of the best round-trip flight deals from Denver to Los Angeles that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Denver to Los Angeles.

Cheap last minute flights

Planning a quick getaway from Denver to Los Angeles? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Los Angeles, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Denver to Los Angeles

Find recent round-trip train or bus tickets from Denver to Los Angeles.

All round-trip flight deals to Los Angeles

The cheapest plane tickets to Los Angeles found on KAYAK recently.
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
7:45 am - 11:03 amONT-DEN
2h 18mnonstop
$57Frontier
Find Deal
Tue, Dec 10 - Wed, Dec 11
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
6:45 am - 10:10 amONT-DEN
2h 25mnonstop
$58Frontier
Find Deal
Wed, Dec 4 - Sat, Dec 7
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
7:45 am - 11:03 amONT-DEN
2h 18mnonstop
$60Frontier
Find Deal
Sat, Dec 7 - Wed, Dec 11
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
7:45 am - 11:03 amONT-DEN
2h 18mnonstop
$62Frontier
Find Deal
Tue, Dec 3 - Wed, Dec 4
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
7:45 am - 11:03 amONT-DEN
2h 18mnonstop
$63Frontier
Find Deal
Tue, Dec 3 - Wed, Dec 4
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
7:45 am - 11:03 amONT-DEN
2h 18mnonstop
$65Frontier
Find Deal
Sat, Dec 14 - Wed, Jan 15
10:14 pm - 11:44 pmDEN-ONT
2h 30mnonstop
8:11 pm - 11:32 pmONT-DEN
2h 21mnonstop
$66Frontier
Find Deal
Wed, Jan 8 - Sun, Jan 12
10:14 pm - 11:44 pmDEN-ONT
2h 30mnonstop
8:11 pm - 11:32 pmONT-DEN
2h 21mnonstop
$67Frontier
Find Deal
Wed, Jan 8 - Sun, Jan 12
11:32 am - 6:25 pmDEN-ONT
7h 53m1 stop
4:25 pm - 10:00 pmONT-DEN
4h 35m1 stop
$207American Airlines
Find Deal
Tue, Dec 31 - Tue, Jan 14
11:16 am - 12:40 pmDEN-ONT
2h 24mnonstop
5:05 am - 8:25 amONT-DEN
2h 20mnonstop
$217United Airlines
Find Deal
Sun, Dec 15 - Wed, Dec 18
10:15 pm - 11:47 pmDEN-ONT
2h 32mnonstop
$28Frontier
Find Deal
Wed, Jan 29
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
$29Frontier
Find Deal
Sat, Dec 7
11:17 am - 12:43 pmDEN-ONT
2h 26mnonstop
$79United Airlines
Find Deal
Sat, Jan 11
2:26 pm - 6:26 pmDEN-ONT
5h 00m1 stop
$99American Airlines
Find Deal
Tue, Feb 18
2:26 pm - 6:26 pmDEN-ONT
5h 00m1 stop
$108American Airlines
Find Deal
Sun, Feb 16
7:28 pm - 8:55 pmDEN-ONT
2h 27mnonstop
$109United Airlines
Find Deal
Sat, Feb 22
6:32 pm - 11:53 pmDEN-ONT
6h 21m1 stop
$128Delta
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Wed, Dec 4
6:32 pm - 11:53 pmDEN-ONT
6h 21m1 stop
$133Delta
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Tue, Dec 3
3:45 pm - 10:15 pmDEN-ONT
7h 30m2 stops
$143Southwest
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Sat, Feb 15
8:45 am - 3:00 pmDEN-ONT
7h 15m2 stops
$153Southwest
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Sat, Feb 1
9:58 am - 11:26 amDEN-ONT
2h 28mnonstop
5:45 am - 9:11 amONT-DEN
2h 26mnonstop
$103Frontier
Find Deal
Mon, Nov 25 - Fri, Nov 29
10:38 pm - 12:04 amDEN-ONT
2h 26mnonstop
5:45 am - 9:11 amONT-DEN
2h 26mnonstop
$109Frontier
Find Deal
Sun, Nov 24 - Fri, Nov 29
10:38 pm - 12:04 amDEN-ONT
2h 26mnonstop
7:45 am - 11:03 amONT-DEN
2h 18mnonstop
$118Frontier
Find Deal
Mon, Nov 25 - Wed, Dec 4
10:38 pm - 12:04 amDEN-ONT
2h 26mnonstop
5:45 am - 9:11 amONT-DEN
2h 26mnonstop
$120Frontier
Find Deal
Sun, Nov 24 - Fri, Nov 29
10:38 pm - 12:04 amDEN-ONT
2h 26mnonstop
2:19 pm - 5:48 pmONT-DEN
2h 29mnonstop
$139Frontier
Find Deal
Mon, Nov 25 - Thu, Nov 28
10:38 pm - 12:04 amDEN-ONT
2h 26mnonstop
12:34 pm - 6:36 pmONT-DEN
5h 02m1 stop
$142Frontier
Find Deal
Mon, Nov 25 - Wed, Dec 4
7:25 pm - 1:00 pmDEN-ONT
18h 35m2 stops
6:28 pm - 4:23 pmONT-DEN
20h 55m2 stops
$692United Airlines
Find Deal
Fri, Nov 22 - Mon, Nov 25
7:25 pm - 5:43 pmDEN-ONT
23h 18m2 stops
6:00 am - 12:10 pmONT-DEN
5h 10m1 stop
$700United Airlines
Find Deal
Mon, Nov 25 - Fri, Nov 29
7:25 pm - 1:00 pmDEN-ONT
18h 35m2 stops
6:00 am - 2:40 pmONT-DEN
7h 40m1 stop
$710United Airlines
Find Deal
Mon, Nov 25 - Fri, Nov 29
6:00 am - 3:41 pmDEN-ONT
10h 41m2 stops
6:00 am - 4:43 pmONT-DEN
9h 43m1 stop
$757Alaska Airlines
Find Deal
Mon, Nov 25 - Thu, Nov 28
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
7:45 am - 11:03 amONT-DEN
2h 18mnonstop
$57Frontier
Find Deal
Tue, Dec 10 - Wed, Dec 11
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
6:45 am - 10:10 amONT-DEN
2h 25mnonstop
$58Frontier
Find Deal
Wed, Dec 4 - Sat, Dec 7
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
7:45 am - 11:03 amONT-DEN
2h 18mnonstop
$60Frontier
Find Deal
Sat, Dec 7 - Wed, Dec 11
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
7:45 am - 11:03 amONT-DEN
2h 18mnonstop
$63Frontier
Find Deal
Tue, Dec 3 - Wed, Dec 4
7:23 pm - 8:47 pmDEN-ONT
2h 24mnonstop
5:05 am - 8:25 amONT-DEN
2h 20mnonstop
$207United Airlines
Find Deal
Mon, Dec 16 - Wed, Dec 18
11:16 am - 12:40 pmDEN-ONT
2h 24mnonstop
5:05 am - 8:25 amONT-DEN
2h 20mnonstop
$217United Airlines
Find Deal
Sun, Dec 15 - Wed, Dec 18
7:23 pm - 8:47 pmDEN-ONT
2h 24mnonstop
5:05 am - 8:25 amONT-DEN
2h 20mnonstop
$237United Airlines
Find Deal
Wed, Dec 11 - Wed, Dec 18
9:30 am - 10:55 amDEN-ONT
2h 25mnonstop
1:30 pm - 4:45 pmONT-DEN
2h 15mnonstop
$273Southwest
Find Deal
Sat, Dec 7 - Sat, Dec 7
10:45 pm - 12:10 amDEN-ONT
2h 25mnonstop
5:00 am - 8:15 amONT-DEN
2h 15mnonstop
$308Southwest
Find Deal
Mon, Dec 30 - Sat, Jan 4
10:25 pm - 11:50 pmDEN-ONT
2h 25mnonstop
4:30 pm - 7:40 pmONT-DEN
2h 10mnonstop
$461Southwest
Find Deal
Thu, Dec 19 - Sat, Dec 28

Frontier flights from Denver to Ontario

Our best Frontier deals on Denver to Ontario flight tickets
Frontier
Dec 10
DEN10:15 pmDenver Intl
2h 29m
ONT11:44 pmOntario
Dec 11
ONT7:45 amOntario
2h 18m
DEN11:03 amDenver Intl
Frontier
Dec 4
DEN10:15 pmDenver Intl
2h 29m
ONT11:44 pmOntario
Dec 7
ONT6:45 amOntario
2h 25m
DEN10:10 amDenver Intl
Frontier
Dec 7
DEN10:15 pmDenver Intl
2h 29m
ONT11:44 pmOntario
Dec 11
ONT7:45 amOntario
2h 18m
DEN11:03 amDenver Intl

American Airlines flights from Denver to Ontario

Our best American Airlines deals on Denver to Ontario flight tickets
American Airlines
Dec 31
DEN11:32 amDenver Intl
7h 53m
1 stop
ONT6:25 pmOntario
Jan 14
ONT4:25 pmOntario
4h 35m
1 stop
DEN10:00 pmDenver Intl
American Airlines
Nov 26
DEN2:44 pmDenver Intl
8h 18m
1 stop
ONT10:02 pmOntario
Nov 28
ONT10:10 amOntario
22h 37m
2 stops
DEN9:47 amDenver Intl
American Airlines
Nov 28
DEN5:05 amDenver Intl
11h 44m
2 stops
ONT3:49 pmOntario
Dec 1
ONT9:30 pmOntario
3h 59m
1 stop
DEN2:29 amDenver Intl

See travel insights to Los Angeles from

How to get the cheapest flight ticket from Denver to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly from Denver to Ontario?

April. The cheapest time of year to fly to Ontario from Denver is April. Most expensive is March

What is the cheapest day to depart Denver for Ontario?

Tuesday. The cheapest day of the week is typically Tuesday. The most expensive is typically Sunday

When is the cheapest time to fly from Denver to Ontario?

In the morning. Denver to Ontario flights are approximately 20% more expensive in the afternoon than in the morning

What is the cheapest Denver to Ontario flight route?

Denver Intl - Ontario. Fly from Denver Intl to Ontario for the best Denver - Ontario flight prices

How far in advance should you book Denver to Ontario flights?

53 days before. The cheapest time to buy a flight from Denver to Ontario is approximately 53 days to departure

What cabin class options are available on Denver to Ontario flights?

There are 2 cabin classes available to choose from on Denver to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Denver to Ontario flights?

No. A direct flight is the cheapest option for a flight between Denver to Ontario.

How have Denver to Ontario flight prices changed over time?

As of November 2024, prices for Denver to Ontario flights are approximately 24% more expensive when compared to flights at the same time last year.

When to book flights from Denver to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Denver to Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Denver to Ontario (DEN to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to Ontario

Best Price Found

$28

Fastest flight time

2h 19m

Direct flights

Every day

Airports in Ontario

1 airport
The best one-way flight to Ontario from Denver in the past 72 hours is $28. The best round-trip flight deal from Denver to Ontario found on momondo in the last 72 hours is $57.
The fastest flight from Denver to Ontario takes 2h 19m
Direct flights go from Denver to Ontario every day.
There is 1 airport near Ontario: Ontario (ONT)

  • How far is Denver Intl to Ontario by plane?

    Denver Intl and Ontario are 800.5 mi apart from one another. In terms of flight time, this usually takes a little over 2h 19m.

  • When did momondo last update prices for flights from Denver Intl Airport to Ontario Airport?

    Prices for flights from Denver Intl Airport to Ontario Airport refresh daily.

  • How many operators does momondo search for flights from Denver Intl Airport to Ontario Airport?

  • How old do you have to be to fly from Denver Intl Airport to Ontario Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Denver Intl Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Denver to Ontario?

  • What is the most popular airline from Denver to Ontario?


Best airlines flying from Denver to Ontario

Compare and see reviews for airlines that fly from Denver to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $47Free CancellationRating
6.1
3,539 reviews
Search Frontier flights
DeltaPriceFrom $89Free CancellationRating
8.0
8,756 reviews
Search Delta flights
United AirlinesPriceFrom $139Free CancellationRating
7.4
9,171 reviews
Search United Airlines flights
SouthwestPriceFrom $178Free CancellationRating
8.1
5,014 reviews
Search Southwest flights
  • Southwest Flights From Denver to Ontario

    The lowest priced Southwest flight from Denver to Ontario from the last 72 hours was $178. Generally, Southwest has 22 flights on this route every week with an average price of $247. Southwest is rated 8.1/10 by our users.

  • United Airlines Flights From Denver to Ontario

    Another popular option for Denver to Ontario flights is United Airlines (7.4/10, 9,171 ratings). United Airlines flies from Denver to Ontario around 14 times per week, with deals starting from $139 round-trip and rising to an average price of around $312.


Why use momondo?

Why should I use momondo to find a flight deal from Denver to Ontario?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Denver.

Can I find flights from Denver to Ontario with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ontario from Denver with this policy.

How can momondo help me find flights from Denver to Ontario?

Once all potential Denver to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Denver to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from Denver. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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