How many flights depart from Ontario to Colorado on average per week?

62 flights are operational weekly from Ontario to Colorado as of May 2026. The most popular departure day for this route is Mon, with 21% of flights per week taking off on this day.

What is the cheapest airline that flies from Ontario to Colorado?

Southwest, Delta, and American Airlines are the most popular carriers operating from Ontario to Colorado

What airlines fly to Colorado?

Frontier, United Airlines and Southwest are the top three most popular airlines that fly to Colorado from Ontario according to our data. Frontier is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 9 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.

How many flights depart from Ontario to Colorado on average per day?

The number of flights available between Ontario and Colorado is 8 per day as of May 2026. The most frequent departure time is 5:00AM, with 44% of daily flights leaving in the afternoon.

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

Prices for flights from Ontario Airport to Colorado refresh daily.

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

As of May 2026, there are 5 operators available to choose from for flights from Ontario Airport to Colorado.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Colorado.

What documentation or ID do you need to fly to Colorado?

The travel and health documents required for your trip to Colorado can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Colorado. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$86 Cheap Flights from Ontario to Colorado in 2026

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Find the cheapest flights from Ontario to Colorado

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 9:26 am

ONT

DEN

2h 26mnonstop

10:29 pm - 11:49 pm

DEN

ONT

2h 20mnonstop

$105Frontier

Wed, Jun 10 - Wed, Jun 17

3:30 pm - 12:09 am

ONT

DEN

7h 39m

1 stop

8:44 am - 10:05 am

DEN

ONT

2h 21mnonstop

$106Frontier

Thu, May 21 - Tue, Jun 23

4:30 pm - 10:20 pm

ONT

COS

4h 50m

1 stop

5:30 am - 8:20 am

COS

ONT

3h 50m

1 stop

$197Southwest

Wed, May 27 - Thu, May 28

4:30 pm - 10:20 pm

ONT

COS

4h 50m

1 stop

5:30 am - 10:55 am

COS

ONT

6h 25m

2 stops

$202Southwest

Wed, May 27 - Thu, May 28

5:00 am - 10:46 am

ONT

COS

4h 46m

1 stop

1:49 pm - 5:28 pm

COS

ONT

4h 39m

1 stop

$227United Airlines

Tue, Jun 2 - Tue, Jun 9

6:30 pm - 11:59 pm

ONT

COS

4h 29m

1 stop

12:56 pm - 5:28 pm

COS

ONT

5h 32m

1 stop

$239United Airlines

Thu, May 28 - Thu, Jun 4

7:12 pm - 12:04 am

ONT

DRO

3h 52m

1 stop

7:25 pm - 9:57 pm

DRO

ONT

3h 32m

1 stop

$261American Airlines

Mon, May 25 - Wed, Jun 3

1:31 pm - 10:57 pm

ONT

COS

8h 26m

2 stops

8:00 am - 5:48 pm

COS

ONT

10h 48m

2 stops

$268American Airlines

Wed, Sep 9 - Tue, Sep 15

4:57 pm - 10:00 pm

ONT

GJT

4h 03m

1 stop

6:51 pm - 11:34 pm

GJT

ONT

5h 43m

1 stop

$271Delta

Wed, May 20 - Thu, May 28

4:57 pm - 10:00 pm

ONT

GJT

4h 03m

1 stop

7:40 am - 12:19 pm

GJT

ONT

5h 39m

1 stop

$280Delta

Tue, May 26 - Sat, May 30

Frontier flights from Ontario to Colorado

Our best Frontier deals on Ontario to Colorado flight tickets

Frontier

Jun 10

ONT6:00 amOntario

2h 26m

DEN9:26 amDenver Intl

Jun 17

DEN10:29 pmDenver Intl

2h 20m

ONT11:49 pmOntario

$105

Frontier

May 21

ONT3:30 pmOntario

7h 39m

1 stop

DEN12:09 amDenver Intl

Jun 23

DEN8:44 amDenver Intl

2h 21m

ONT10:05 amOntario

$106

Frontier

May 21

ONT3:30 pmOntario

7h 39m

1 stop

DEN12:09 amDenver Intl

Jun 3

DEN8:41 amDenver Intl

2h 24m

ONT10:05 amOntario

$107

United Airlines flights from Ontario to Colorado

Our best United Airlines deals on Ontario to Colorado flight tickets

United Airlines

May 26

ONT6:30 pmOntario

2h 21m

DEN9:51 pmDenver Intl

May 28

DEN7:20 pmDenver Intl

2h 22m

ONT8:42 pmOntario

$157

United Airlines

Jun 2

ONT5:00 amOntario

4h 46m

1 stop

COS10:46 amColorado Springs

Jun 9

COS1:49 pmColorado Springs

4h 39m

1 stop

ONT5:28 pmOntario

$227

United Airlines

May 28

ONT6:30 pmOntario

4h 29m

1 stop

COS11:59 pmColorado Springs

Jun 4

COS12:56 pmColorado Springs

5h 32m

1 stop

ONT5:28 pmOntario

$239

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Wed 6/10

6:00 am-9:26 am

Nonstop2h 26m

Denver Intl

Wed 6/17

10:29 pm-11:49 pm

Nonstop2h 20m

$105

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Thu 5/21

3:30 pm-12:09 am

1 stop7h 39m

Denver Intl

Tue 6/23

8:44 am-10:05 am

Nonstop2h 21m

$106

OntarioColorado Springs

ONT - COS

ONTCOS

Ontario

Wed 5/27

4:30 pm-10:20 pm

1 stop4h 50m

Colorado Springs

Thu 5/28

5:30 am-8:20 am

1 stop3h 50m

$197

OntarioColorado Springs

ONT - COS

ONTCOS

Ontario

Wed 5/27

4:30 pm-10:20 pm

1 stop4h 50m

Colorado Springs

Thu 5/28

5:30 am-10:55 am

2 stops6h 25m

$202

OntarioColorado Springs

ONT - COS

ONTCOS

Ontario

Tue 6/2

5:00 am-10:46 am

1 stop4h 46m

Colorado Springs

Tue 6/9

1:49 pm-5:28 pm

1 stop4h 39m

$227

OntarioColorado Springs

ONT - COS

ONTCOS

Ontario

Thu 5/28

6:30 pm-11:59 pm

1 stop4h 29m

Colorado Springs

Thu 6/4

12:56 pm-5:28 pm

1 stop5h 32m

$239

OntarioDurango

ONT - DRO

ONTDRO

Ontario

Mon 5/25

7:12 pm-12:04 am

1 stop3h 52m

Durango La Plata County

Wed 6/3

7:25 pm-9:57 pm

1 stop3h 32m

$261

OntarioColorado Springs

ONT - COS

ONTCOS

Ontario

Wed 9/9

1:31 pm-10:57 pm

2 stops8h 26m

Colorado Springs

Tue 9/15

8:00 am-5:48 pm

2 stops10h 48m

$268

OntarioGrand Junction

ONT - GJT

ONTGJT

Ontario

Wed 5/20

4:57 pm-10:00 pm

1 stop4h 03m

Grand Junction Regnl

Thu 5/28

6:51 pm-11:34 pm

1 stop5h 43m

$271

OntarioGrand Junction

ONT - GJT

ONTGJT

Ontario

Tue 5/26

4:57 pm-10:00 pm

1 stop4h 03m

Grand Junction Regnl

Sat 5/30

7:40 am-12:19 pm

1 stop5h 39m

$280

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Ontario to Colorado

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

Prices

Airlines

Other information

What is the cheapest month to fly to Colorado?

The month of January is, on average, the cheapest month to fly to Colorado from Ontario, with most prices found around $39. The month of February is another great option to travel to Colorado, with average flight prices from Ontario averaging around $40.

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

The cheapest day to depart from Ontario to Colorado is on a Friday when prices can be found for as low as $264. On the other hand, Monday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $340.

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

The cheapest time of day to fly to Colorado is in the evening when flights can be purchased for as low as $208. At noon is when there is more demand to fly to Colorado, so prices are often more expensive at around $433 per ticket.

What is the cheapest Ontario to Colorado flight route?

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

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

You are more likely to see cheaper flights to Colorado from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Colorado for around $192 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Colorado from Ontario for as low as $154 on momondo.

Can stopping save me money on Ontario to Colorado flights?

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

Cheap Ontario to Colorado flight deals and tips

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

Best Price Found	$132
Fastest flight time	2h 11m
Direct flights	Every day
Airports in Colorado	87 airports

The best one-way flight to Colorado from Ontario in the past 72 hours is $132. The best round-trip flight deal from Ontario to Colorado found on momondo in the last 72 hours is $234.

The fastest flight from Ontario to Colorado takes 2h 11m

Direct flights go from Ontario to Colorado every day.

There are 87 airports in Colorado. From Ontario there are direct flights to Denver Intl (DEN).

Search flight deals

Frequently asked questions about flying from Ontario to Colorado

When did momondo last update prices for flights from Ontario Airport to Colorado?
Prices for flights from Ontario Airport to Colorado refresh daily.
How many operators does momondo search for flights from Ontario Airport to Colorado?
As of May 2026, there are 5 operators available to choose from for flights from Ontario Airport to Colorado.
How old do you have to be to fly from Ontario Airport to Colorado?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Colorado.
What documentation or ID do you need to fly to Colorado?
The travel and health documents required for your trip to Colorado can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Colorado. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Ontario to Colorado?
Based on momondo bookings for flights between Ontario and Colorado, the leading plane model is Boeing 737 MAX 8, making up 13.61% of the total bookings. Other popular models include Boeing 737-800 with 11.16%, Airbus A320neo with 10.78%, and Airbus A321neo with 9.75%.

Best airlines flying from Ontario to Colorado

Compare and see reviews for airlines that fly from Ontario to Colorado with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $63	Free Cancellation	Rating 5.6 2,965 reviews	Search Frontier flights
United Airlines	PriceFrom $157	Free Cancellation	Rating 7.4 9,680 reviews	Search United Airlines flights
Southwest	PriceFrom $157	Free Cancellation	Rating 7.9 4,307 reviews	Search Southwest flights
Delta	PriceFrom $172	Free Cancellation	Rating 7.9 8,460 reviews	Search Delta flights
American Airlines	PriceFrom $211	Free Cancellation	Rating 7.1 11,672 reviews	Search American Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Colorado for you.

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

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

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Colorado.

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

Yes. momondo can track prices for Ontario to Colorado 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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Flights to Fort Lauderdalefrom $52

Cheap flights from Ontario to Colorado from $86

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Colorado departing on 6/8. 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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Our best United Airlines deals on Ontario to Colorado flight tickets

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How to get the cheapest flight ticket from Ontario to Colorado

What is the cheapest month to fly to Colorado?

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

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

What is the cheapest Ontario to Colorado flight route?

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

Can stopping save me money on Ontario to Colorado flights?

What is the cheapest airline that flies from Ontario to Colorado?

What airlines fly to Colorado?

How many flights depart from Ontario to Colorado on average per day?

How many flights depart from Ontario to Colorado on average per week?

Cheap Ontario to Colorado flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Colorado

Frequently asked questions about flying from Ontario to Colorado

Best airlines flying from Ontario to Colorado

Compare and see reviews for airlines that fly from Ontario to Colorado with momondo

Why use momondo?

An easier way to manage your Colorado trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Colorado

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