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Cheap flights from Colorado to Ontario from $42

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Ontario departing on 12/18. 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 Colorado to Los Angeles

Cheap round-trip flights

These are some of the best round-trip flight deals from Colorado 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 Colorado to Los Angeles.

Cheap last minute flights

Planning a quick getaway from Colorado 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 Colorado to Los Angeles

Find recent round-trip train or bus tickets from Colorado 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 - 11:47 pmDEN-ONT
2h 32mnonstop
7:45 am - 11:10 amONT-DEN
2h 25mnonstop
$58Frontier
Find Deal
Sat, Jan 18 - Tue, Jan 21
11:32 am - 6:25 pmDEN-ONT
7h 53m1 stop
6:10 am - 12:09 pmONT-DEN
4h 59m1 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
4:43 pm - 10:16 pmCOS-ONT
6h 33m1 stop
11:59 pm - 9:41 amONT-COS
8h 42m1 stop
$318American Airlines
Find Deal
Tue, Jan 7 - Sun, Jan 12
5:15 pm - 8:51 pmCOS-ONT
4h 36m1 stop
5:10 am - 10:53 amONT-COS
4h 43m1 stop
$329United Airlines
Find Deal
Fri, Jan 10 - Sun, Jan 12
6:30 am - 2:55 pmCOS-ONT
9h 25m1 stop
5:30 am - 11:50 amONT-COS
5h 20m1 stop
$334Southwest
Find Deal
Thu, Feb 20 - Tue, Mar 18
6:30 am - 12:30 pmCOS-ONT
7h 00m2 stops
6:35 am - 1:40 pmONT-COS
6h 05m1 stop
$339Southwest
Find Deal
Thu, Feb 20 - Tue, Mar 18
1:05 pm - 4:19 pmGJT-ONT
4h 14m1 stop
11:29 am - 10:30 pmONT-GJT
10h 01m2 stops
$638Delta
Find Deal
Sun, May 4 - Sat, May 10
8:20 am - 12:11 pmCOS-ONT
4h 51m1 stop
1:25 pm - 7:39 pmONT-COS
5h 14m1 stop
$644Delta
Find Deal
Sun, Dec 1 - Tue, Dec 10
10:29 pm - 11:59 pmDEN-ONT
2h 30mnonstop
$42Frontier
Find Deal
Wed, Dec 18
9:30 am - 11:00 amDEN-ONT
2h 30mnonstop
$43Frontier
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Mon, Dec 30
7:25 pm - 8:51 pmDEN-ONT
2h 26mnonstop
$79United Airlines
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Sat, Jan 11
2:26 pm - 6:26 pmDEN-ONT
5h 00m1 stop
$99American Airlines
Find Deal
Tue, Feb 18
7:00 am - 3:26 pmDEN-ONT
9h 26m1 stop
$108Alaska Airlines
Find Deal
Thu, Feb 20
11:17 am - 12:43 pmDEN-ONT
2h 26mnonstop
$109United Airlines
Find Deal
Sat, Jan 18
7:00 am - 5:04 pmDEN-ONT
11h 04m2 stops
$126Alaska Airlines
Find Deal
Tue, Feb 4
6:25 am - 3:25 pmDEN-ONT
10h 00m1 stop
$127Delta
Find Deal
Wed, Feb 19
6:32 pm - 11:53 pmDEN-ONT
6h 21m1 stop
$128Delta
Find Deal
Wed, Dec 4
3:19 pm - 6:24 pmGJT-ONT
4h 05m1 stop
$189American Airlines
Find Deal
Mon, Jan 20
6:55 am - 8:26 amDEN-ONT
2h 31mnonstop
7:45 am - 11:03 amONT-DEN
2h 18mnonstop
$115Frontier
Find Deal
Tue, Nov 26 - Tue, Dec 3
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
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
11:30 am - 9:53 amDEN-ONT
23h 23m2 stops
3:15 pm - 11:59 pmONT-DEN
7h 44m1 stop
$710United Airlines
Find Deal
Mon, Nov 25 - Fri, Nov 29
6:00 am - 3:41 pmDEN-ONT
10h 41m2 stops
2:22 pm - 9:46 amONT-DEN
18h 24m1 stop
$757Alaska Airlines
Find Deal
Mon, Nov 25 - Thu, Nov 28
11:58 am - 9:05 amDEN-ONT
22h 07m2 stops
10:50 am - 8:42 pmONT-DEN
8h 52m1 stop
$772Alaska Airlines
Find Deal
Fri, Nov 22 - Fri, Nov 29
11:20 am - 3:23 pmDEN-ONT
5h 03m1 stop
6:10 am - 11:45 amONT-DEN
4h 35m1 stop
$860American Airlines
Find Deal
Sun, Nov 24 - Fri, Nov 29
10:59 am - 4:19 pmDEN-ONT
6h 20m1 stop
5:00 pm - 10:55 pmONT-DEN
4h 55m1 stop
$878Delta
Find Deal
Sat, Nov 23 - Wed, Nov 27
12:40 pm - 4:19 pmDEN-ONT
4h 39m1 stop
5:00 pm - 10:55 pmONT-DEN
4h 55m1 stop
$883Delta
Find Deal
Sun, Nov 24 - Wed, Nov 27
2:44 pm - 10:02 pmDEN-ONT
8h 18m2 stops
4:25 pm - 10:15 pmONT-DEN
4h 50m1 stop
$970American Airlines
Find Deal
Sun, Nov 24 - Wed, Nov 27
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 - 11:47 pmDEN-ONT
2h 32mnonstop
7:45 am - 11:10 amONT-DEN
2h 25mnonstop
$58Frontier
Find Deal
Sat, Jan 18 - Tue, Jan 21
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
$65Frontier
Find Deal
Sat, Dec 14 - Wed, Jan 15
10:15 pm - 11:44 pmDEN-ONT
2h 29mnonstop
6:34 pm - 9:53 pmONT-DEN
2h 19mnonstop
$67Frontier
Find Deal
Wed, Dec 11 - Fri, Dec 13
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
6:50 pm - 8:20 pmDEN-ONT
2h 30mnonstop
1:35 pm - 4:45 pmONT-DEN
2h 10mnonstop
$236Southwest
Find Deal
Sun, Jan 12 - Fri, Jan 17
7:25 pm - 8:51 pmDEN-ONT
2h 26mnonstop
5:10 am - 8:29 amONT-DEN
2h 19mnonstop
$237United Airlines
Find Deal
Sat, Jan 11 - Sun, Jan 12
10:50 pm - 12:15 amDEN-ONT
2h 25mnonstop
4:30 pm - 7:40 pmONT-DEN
2h 10mnonstop
$479Southwest
Find Deal
Sat, Dec 21 - Sat, Dec 28

Frontier flights from Colorado to Ontario

Our best Frontier deals on Colorado 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
Jan 18
DEN10:15 pmDenver Intl
2h 32m
ONT11:47 pmOntario
Jan 21
ONT7:45 amOntario
2h 25m
DEN11:10 amDenver Intl
Frontier
Dec 3
DEN10:15 pmDenver Intl
2h 29m
ONT11:44 pmOntario
Dec 4
ONT7:45 amOntario
2h 18m
DEN11:03 amDenver Intl

American Airlines flights from Colorado to Ontario

Our best American Airlines deals on Colorado to Ontario flight tickets
American Airlines
Dec 31
DEN11:32 amDenver Intl
7h 53m
1 stop
ONT6:25 pmOntario
Jan 14
ONT6:10 amOntario
4h 59m
1 stop
DEN12:09 pmDenver Intl
American Airlines
Jan 7
COS4:43 pmColorado Springs
6h 33m
1 stop
ONT10:16 pmOntario
Jan 12
ONT11:59 pmOntario
8h 42m
1 stop
COS9:41 amColorado Springs
American Airlines
Jan 7
COS10:21 amColorado Springs
9h 03m
2 stops
ONT6:24 pmOntario
Jan 12
ONT11:59 pmOntario
8h 42m
1 stop
COS9:41 amColorado Springs

See travel insights to Los Angeles from

How to get the cheapest flight ticket from Colorado 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 to Ontario?

In general, April is the cheapest month to fly from Colorado to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $104. If you aren’t able to travel during the month of April, then book flights to Ontario from Colorado during August instead. Flights to Ontario in August, while not as cheap as those in April, still average around $112.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $120. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Colorado to Ontario for around $172.

What is the cheapest time of day to depart on your flight to Ontario?

In the morning is the cheapest time of day to fly from Colorado to Ontario when you can find flight prices for as low as $138. Flying to Ontario in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $173 on average. Flights to Ontario from Colorado in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Colorado to Ontario flight route?

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

How far in advance should I book a flight to Ontario?

Most flyers found that booking tickets 53 days in advance of their planned departure date is the best time to get cheap flights to Ontario. During this timeframe, flight prices are around $140. However, in the past 72 hours, people saw flights from Colorado for as low as $74.

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

There are 4 cabin classes available to choose from on Colorado 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 Colorado to Ontario flights?

You could potentially save up to 89% on your flight if you consider stops on a Colorado to Ontario flight.

Cheap Colorado to Ontario flight deals and tips

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

Best Price Found

$42

Fastest flight time

2h 19m

Direct flights

Every day

Airports in Ontario

1 airport
The best one-way flight to Ontario from Colorado in the past 72 hours is $42. The best round-trip flight deal from Colorado to Ontario found on momondo in the last 72 hours is $57.
The fastest flight from Colorado to Ontario takes 2h 19m
Direct flights go from Colorado to Ontario every day.
There is 1 airport near Ontario: Ontario (ONT)

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

    Prices for flights from Colorado to Ontario Airport refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Colorado to Ontario Airport.

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

    The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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


Best airlines flying from Colorado to Ontario

Compare and see reviews for airlines that fly from Colorado to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $47Free CancellationRating
6.1
3,536 reviews
Search Frontier flights
DeltaPriceFrom $89Free CancellationRating
8.0
8,755 reviews
Search Delta flights
United AirlinesPriceFrom $139Free CancellationRating
7.4
9,172 reviews
Search United Airlines flights
SouthwestPriceFrom $178Free CancellationRating
8.1
5,005 reviews
Search Southwest flights
American AirlinesPriceFrom $276Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Colorado 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 Colorado.

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

All flight searches from Colorado to Ontario on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Colorado 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 Colorado to Ontario right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Colorado to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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