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Cheap flights from Ontario to Colorado from C$ 209

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — DEN
2 Apr — 9 Apr1
1 adult

Cheap flight deals from Ontario to Colorado

Keep the following information in mind while searching for Ontario to Colorado flight deals. Data was last updated 28 March 2025.

Round-trip from

C$ 322

One-way from

C$ 209

Popular in

December

Cheapest in

October

Average price

C$ 693

Good round-trip deal

C$ 502 or less

Good one-way deal

C$ 318 or less
WestJet
  • WestJet
  • 1/6-8/6
  • 3 total stops
  • 23h 47m total
  • Ontario to Colorado
WestJet
  • WestJet
  • 17/8
  • 2 total stops
  • 14h 07m total
  • Ontario to Colorado
Highest demand for flights based on searches. 1% potential increase in price (C$ 12 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease (C$ 11 potential savings vs. average RT price).
Average for round-trip flights in March 2025
Price to beat on a round-trip flight from Ontario to Colorado.
Price to beat on a one-way flight from Ontario to Colorado.

Find flight deals from Ontario to Colorado

Cheapest flights from Ontario to Colorado
Explore the most affordable flight options available from Ontario to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 March 2025.

Sun 1/66:10 a.m.YOW - DEN
2 stops14h 42mWestJet
Sun 8/67:40 p.m.DEN - YOW
1 stop9h 05mWestJet
Deal found 27/3C$ 322
Sun 25/56:00 a.m.YHM - DEN
1 stop14h 52mWestJet
Wed 28/512:15 p.m.DEN - YHM
1 stop10h 26mWestJet
Deal found 26/3C$ 382
Mon 28/46:10 p.m.YOW - DEN
1 stop16h 51mMultiple Airlines
Wed 7/512:15 p.m.DEN - YOW
1 stop10h 26mMultiple Airlines
Deal found 27/3C$ 416
Fri 27/61:25 p.m.YYZ - COS
1 stop9h 33mDelta
Sun 29/66:00 a.m.COS - YYZ
1 stop7h 04mDelta
Deal found 26/3C$ 417
Sat 26/46:45 a.m.YYZ - COS
1 stop11h 04mAmerican Airlines
Sat 3/56:00 a.m.COS - YYZ
2 stops9h 20mAmerican Airlines
Deal found 27/3C$ 424
Sun 1/68:05 a.m.YUL - COS
1 stop15h 46mUnited Airlines
Sat 14/63:43 p.m.COS - YUL
2 stops18h 13mUnited Airlines
Deal found 27/3C$ 447
Sun 11/56:20 p.m.YYZ - DEN
Nonstop3h 45mMultiple Airlines
Sun 18/512:15 p.m.DEN - YYZ
1 stop8h 39mMultiple Airlines
Deal found 27/3C$ 503
Thu 11/98:00 a.m.YYZ - DEN
1 stop29h 24mWestJet
Mon 15/912:15 p.m.DEN - YYZ
1 stop8h 37mWestJet
Deal found 27/3C$ 505
Sun 1/68:00 a.m.YUL - COS
2 stops14h 40mAir Canada
Sat 14/65:30 a.m.COS - YUL
2 stops9h 51mAir Canada
Deal found 27/3C$ 513
Mon 28/44:10 p.m.YTZ - DEN
2 stops13h 46mMultiple Airlines
Thu 1/53:42 p.m.DEN - YTZ
1 stop18h 40mMultiple Airlines
Deal found 27/3C$ 536
Sat 26/47:00 a.m.YUL - GJT
2 stops17h 31mDelta
Sat 3/56:05 a.m.GJT - YUL
2 stops15h 23mDelta
Deal found 27/3C$ 555
Wed 25/66:45 a.m.YUL - DEN
2 stops30h 42mWestJet
Sun 6/712:15 p.m.DEN - YUL
1 stop10h 28mWestJet
Deal found 28/3C$ 563

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Colorado 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, Cheapflights users made 629,999 searches. Data last updated 28 March 2025.
Use the filters below to find and compare flights from Ontario to Colorado that are best for you.

Fly from

Ontario

Fly to

Colorado

Route

Depart

Return

Price

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sun 1/6

6:10 a.m.-6:52 p.m.

2 stops14h 42m

Denver Intl

Sun 8/6

7:40 p.m.-6:45 a.m.

1 stop9h 05m

C$ 322

HamiltonDenver

YHM - DEN

YHMDEN

Hamilton

Sun 25/5

6:00 a.m.-6:52 p.m.

1 stop14h 52m

Denver Intl

Wed 28/5

12:15 p.m.-12:41 a.m.

1 stop10h 26m

C$ 382

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Mon 28/4

6:10 p.m.-9:01 a.m.

1 stop16h 51m

Denver Intl

Wed 7/5

12:15 p.m.-12:41 a.m.

1 stop10h 26m

C$ 416

TorontoColorado Springs

YYZ - COS

YYZCOS

Toronto Pearson Intl

Fri 27/6

1:25 p.m.-8:58 p.m.

1 stop9h 33m

Colorado Springs

Sun 29/6

6:00 a.m.-3:04 p.m.

1 stop7h 04m

C$ 417

TorontoColorado Springs

YYZ - COS

YYZCOS

Toronto Pearson Intl

Sat 26/4

6:45 a.m.-3:49 p.m.

1 stop11h 04m

Colorado Springs

Sat 3/5

6:00 a.m.-5:20 p.m.

2 stops9h 20m

C$ 424

MontrealColorado Springs

YUL - COS

YULCOS

Montreal Pierre Elliott Trudeau Intl

Sun 1/6

8:05 a.m.-9:51 p.m.

1 stop15h 46m

Colorado Springs

Sat 14/6

3:43 p.m.-11:56 a.m.

2 stops18h 13m

C$ 447

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Sun 11/5

6:20 p.m.-8:05 p.m.

Nonstop3h 45m

Denver Intl

Sun 18/5

12:15 p.m.-10:54 p.m.

1 stop8h 39m

C$ 503

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Thu 11/9

8:00 a.m.-11:24 a.m.

1 stop29h 24m

Denver Intl

Mon 15/9

12:15 p.m.-10:52 p.m.

1 stop8h 37m

C$ 505

MontrealColorado Springs

YUL - COS

YULCOS

Montreal Pierre Elliott Trudeau Intl

Sun 1/6

8:00 a.m.-8:40 p.m.

2 stops14h 40m

Colorado Springs

Sat 14/6

5:30 a.m.-5:21 p.m.

2 stops9h 51m

C$ 513

TorontoDenver

YTZ - DEN

YTZDEN

Toronto Island

Mon 28/4

4:10 p.m.-3:56 a.m.

2 stops13h 46m

Denver Intl

Thu 1/5

3:42 p.m.-12:22 p.m.

1 stop18h 40m

C$ 536

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/3

Showing 1-10 of 56 results
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Best time to book a flight from Ontario to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Colorado

What is the cheapest month to book a flight from Region of Ontario to Colorado?

Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Colorado (average of C$ 320). Flying from Region of Ontario to Colorado in December is currently the most expensive (average of C$ 484). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to CO?

Find hourly flight availability from Ontario to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 March 2025.

When flying from Region of Ontario to Colorado, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Colorado by month

Plan your trip to Colorado by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Colorado ranges from 13.0 - 58.0 mm per month. May is typically the wettest month, when rainfall can reach 58.0 mm. January is typically the driest time to visit Colorado when rainfall is around 13.0 mm.

Temperature in Colorado by month

Plan your trip to Colorado by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Colorado, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Colorado. Reviews last updated 28 March 2025.
See what other customers who have flown with Alaska Airlines, Delta and Hawaiian Airlines from Ontario to Colorado have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
8.0
Very good

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Ontario to Colorado. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What are the cheapest airlines to fly from Region of Ontario to Colorado one-way?

    The cheapest airlines for a one-way flight from Region of Ontario to Colorado are WestJet (C$ 209), Delta (C$ 249), and American Airlines (C$ 254).

  • Can I find deals for flights from Ontario to Colorado that include hotel bookings?

    Yes. In addition to deals on Ontario to Colorado flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Colorado?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Colorado.

  • Can I find deals for business class flights from Ontario to Colorado?

    Yes. Cheapflights offers flight deals from Ontario to Colorado by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Region of Ontario to Colorado?

    Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Colorado (average of C$ 320). Flying from Region of Ontario to Colorado in December is currently the most expensive (average of C$ 484). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Colorado

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Ontario to Colorado

Discover the top 3 airlines that operate flights from Ontario to Colorado. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 28 March 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 250AverageC$ 474FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 334AverageC$ 729FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 352AverageC$ 786FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to Colorado?

Cheapflights makes it easy to find Ontario to Colorado flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Colorado?

Cheapflights helps you find that perfect flight to Colorado from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ontario to Colorado with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Ontario to Colorado, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Ontario to Colorado become cheaper?

Yes! Start tracking prices for Ontario to Colorado flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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