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Cheap flights from Colorado to Los Angeles from $46

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 Los Angeles departing on 8/30. 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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0 bags

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Find the cheapest flights from Colorado to Los Angeles

Cheap round-trip flights

Frontier Logo
6:29 pm - 7:54 pmDEN-ONT
2h 25mnonstop
Frontier Logo
8:59 pm - 12:26 amONT-DEN
2h 27mnonstop
$87Frontier
Find Deal
Wed, Sep 10 - Sat, Sep 13
Frontier Logo
10:29 pm - 11:50 pmDEN-ONT
2h 21mnonstop
Frontier Logo
8:59 pm - 12:26 amONT-DEN
2h 27mnonstop
$102Frontier
Find Deal
Tue, Aug 26 - Sat, Sep 6
Southwest Logo
4:55 pm - 10:45 pmCOS-ONT
6h 50m1 stop
Southwest Logo
3:35 pm - 10:40 pmONT-COS
6h 05m1 stop
$206Southwest
Find Deal
Fri, Aug 29 - Tue, Sep 2
American Airlines Logo
6:02 am - 11:55 amCOS-ONT
6h 53m1 stop
American Airlines Logo
2:54 pm - 10:08 pmONT-COS
6h 14m1 stop
$216American Airlines
Find Deal
Tue, Sep 9 - Wed, Sep 17
Delta Logo
8:00 am - 12:14 pmCOS-ONT
5h 14m1 stop
Delta Logo
9:50 am - 5:15 pmONT-COS
6h 25m1 stop
$217Delta
Find Deal
Tue, Aug 26 - Sun, Sep 7
Delta Logo
5:55 pm - 10:40 pmCOS-ONT
5h 45m1 stop
Delta Logo
4:50 pm - 10:18 pmONT-COS
4h 28m1 stop
$218Delta
Find Deal
Sat, Aug 30 - Sat, Sep 6
American Airlines Logo
6:02 am - 4:05 pmCOS-ONT
11h 03m2 stops
American Airlines Logo
2:54 pm - 10:08 pmONT-COS
6h 14m1 stop
$221American Airlines
Find Deal
Tue, Sep 9 - Wed, Sep 17
Southwest Logo
6:15 pm - 11:40 pmCOS-ONT
6h 25m1 stop
Southwest Logo
4:40 pm - 11:30 pmONT-COS
5h 50m1 stop
$245Southwest
Find Deal
Thu, Oct 9 - Sun, Oct 12
United Airlines Logo
12:50 pm - 5:29 pmCOS-ONT
5h 39m1 stop
United Airlines Logo
5:10 am - 1:14 pmONT-COS
7h 04m1 stop
$253United Airlines
Find Deal
Mon, Aug 25 - Mon, Sep 8
United Airlines Logo
11:35 am - 8:33 pmCOS-ONT
9h 58m2 stops
United Airlines Logo
5:10 am - 12:09 pmONT-COS
5h 59m1 stop
$258United Airlines
Find Deal
Sat, Aug 30 - Mon, Sep 1

Frontier flights from Colorado to Ontario

Our best Frontier deals on Colorado to Ontario flight tickets
Frontier
Sep 10
DEN6:29 pmDenver Intl
2h 25m
ONT7:54 pmOntario
Sep 13
ONT8:59 pmOntario
2h 27m
DEN12:26 amDenver Intl
$87
Find similar
Frontier
Aug 26
DEN10:29 pmDenver Intl
2h 21m
ONT11:50 pmOntario
Sep 6
ONT8:59 pmOntario
2h 27m
DEN12:26 amDenver Intl
$102
Find similar
Frontier
Sep 2
DEN10:29 pmDenver Intl
2h 21m
ONT11:50 pmOntario
Sep 6
ONT8:59 pmOntario
2h 27m
DEN12:26 amDenver Intl
$104
Find similar

Delta flights from Colorado to Ontario

Our best Delta deals on Colorado to Ontario flight tickets
Delta
Aug 26
COS8:00 amColorado Springs
5h 14m
1 stop
ONT12:14 pmOntario
Sep 7
ONT9:50 amOntario
6h 25m
1 stop
COS5:15 pmColorado Springs
$217
Find similar
Delta
Aug 30
COS5:55 pmColorado Springs
5h 45m
1 stop
ONT10:40 pmOntario
Sep 6
ONT4:50 pmOntario
4h 28m
1 stop
COS10:18 pmColorado Springs
$218
Find similar
Delta
Sep 4
GJT6:00 amGrand Junction Regnl
3h 55m
1 stop
ONT8:55 amOntario
Sep 8
ONT4:50 pmOntario
4h 53m
1 stop
GJT10:43 pmGrand Junction Regnl
$229
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Colorado to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 7, 2025.
Use the filters below to find and compare flights from Colorado to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverOntario

DEN - ONT

DENONT

Denver Intl

Wed 9/10

6:29 pm-7:54 pm

Nonstop2h 25m

Ontario

Sat 9/13

8:59 pm-12:26 am

Nonstop2h 27m

$87

DenverOntario

DEN - ONT

DENONT

Denver Intl

Tue 8/26

10:29 pm-11:50 pm

Nonstop2h 21m

Ontario

Sat 9/6

8:59 pm-12:26 am

Nonstop2h 27m

$102

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Fri 8/29

4:55 pm-10:45 pm

1 stop6h 50m

Ontario

Tue 9/2

3:35 pm-10:40 pm

1 stop6h 05m

$206

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Tue 9/9

6:02 am-11:55 am

1 stop6h 53m

Ontario

Wed 9/17

2:54 pm-10:08 pm

1 stop6h 14m

$216

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Tue 8/26

8:00 am-12:14 pm

1 stop5h 14m

Ontario

Sun 9/7

9:50 am-5:15 pm

1 stop6h 25m

$217

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Sat 8/30

5:55 pm-10:40 pm

1 stop5h 45m

Ontario

Sat 9/6

4:50 pm-10:18 pm

1 stop4h 28m

$218

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Tue 9/9

6:02 am-4:05 pm

2 stops11h 03m

Ontario

Wed 9/17

2:54 pm-10:08 pm

1 stop6h 14m

$221

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Thu 10/9

6:15 pm-11:40 pm

1 stop6h 25m

Ontario

Sun 10/12

4:40 pm-11:30 pm

1 stop5h 50m

$245

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Mon 8/25

12:50 pm-5:29 pm

1 stop5h 39m

Ontario

Mon 9/8

5:10 am-1:14 pm

1 stop7h 04m

$253

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Sat 8/30

11:35 am-8:33 pm

2 stops9h 58m

Ontario

Mon 9/1

5:10 am-12:09 pm

1 stop5h 59m

$258

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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, January 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 $115. If you aren’t able to travel during the month of January, then book flights to Ontario from Colorado during August instead. Flights to Ontario in August, while not as cheap as those in January, still average around $131.

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 Saturday when prices can be found for as low as $152. 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 $189.

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

In the evening is the cheapest time of day to fly from Colorado to Ontario when you can find flight prices for as low as $154. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $198 on average. Flights to Ontario from Colorado at noon 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?

You are more likely to see cheaper flights to Ontario from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $156 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Colorado for as low as $76 on momondo.

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?

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

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

$46

Fastest flight time

2h 15m

Direct flights

Every day

Airports in Ontario

1 airport
The best one-way flight to Ontario from Colorado in the past 72 hours is $46. The best round-trip flight deal from Colorado to Ontario found on momondo in the last 72 hours is $87.
The fastest flight from Colorado to Ontario takes 2h 15m
Direct flights go from Colorado to Ontario every day.
There is 1 airport near Ontario: Ontario (ONT)
Search flight deals

  • 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 $58Free CancellationRating
5.8
3,231 reviews
Search Frontier flights
SouthwestPriceFrom $120Free CancellationRating
8.0
4,244 reviews
Search Southwest flights
United AirlinesPriceFrom $146Free CancellationRating
7.4
8,917 reviews
Search United Airlines flights
DeltaPriceFrom $256Free CancellationRating
8.0
7,985 reviews
Search Delta flights
American AirlinesPriceFrom $278Free 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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