Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Ontario to Colorado from C$ 152

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 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — DEN
27 Apr — 4 May1
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 22 April 2025.

Round-trip from

C$ 352

One-way from

C$ 152

Popular in

December

Cheapest in

October

Average price

C$ 649

Good round-trip deal

C$ 425 or less

Good one-way deal

C$ 251 or less
Delta
  • Delta
  • 4/9-8/9
  • 3 total stops
  • 21h 12m total
  • Ontario to Colorado
WestJet
  • WestJet
  • 1/6
  • 1 total stop
  • 14h 52m total
  • Ontario to Colorado
Highest demand for flights based on searches. 3% potential increase in price (C$ 28 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).
Average for round-trip flights in April 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 22 April 2025.

Thu 4/96:30 a.m.YYZ - COS
1 stop6h 14mDelta
Mon 8/96:00 a.m.COS - YYZ
2 stops14h 58mDelta
Deal found 21/4C$ 352
Thu 18/912:45 p.m.YUL - COS
1 stop10h 35mDelta
Mon 22/96:00 a.m.COS - YUL
2 stops13h 26mDelta
Deal found 22/4C$ 376
Sat 19/73:45 p.m.YOW - DEN
1 stop21h 42mWestJet
Sun 27/77:40 p.m.DEN - YOW
1 stop9h 05mWestJet
Deal found 21/4C$ 378
Sun 17/86:00 a.m.YHM - DEN
1 stop14h 52mWestJet
Sat 23/812:15 p.m.DEN - YHM
1 stop10h 26mWestJet
Deal found 21/4C$ 381
Wed 25/66:45 a.m.YUL - DEN
2 stops30h 42mWestJet
Wed 9/712:15 p.m.DEN - YUL
1 stop10h 28mWestJet
Deal found 20/4C$ 390
Sun 4/59:45 a.m.YYZ - DEN
1 stop26h 12mMultiple Airlines
Thu 8/512:15 p.m.DEN - YYZ
1 stop8h 41mMultiple Airlines
Deal found 20/4C$ 391
Fri 1/86:00 a.m.YKF - DEN
1 stop14h 52mWestJet
Tue 5/812:15 p.m.DEN - YKF
1 stop10h 31mWestJet
Deal found 20/4C$ 398
Thu 10/710:20 p.m.YYZ - DEN
2 stops15h 07mWestJet
Mon 14/712:15 p.m.DEN - YYZ
2 stops15h 36mWestJet
Deal found 21/4C$ 401
Wed 21/58:05 a.m.YUL - COS
1 stop11h 49mUnited Airlines
Sun 25/55:30 a.m.COS - YUL
1 stop15h 56mUnited Airlines
Deal found 20/4C$ 416
Fri 23/58:05 a.m.YUL - DEN
Nonstop4h 22mAir Canada
Fri 30/55:40 p.m.DEN - YUL
Nonstop3h 46mAir Canada
Deal found 21/4C$ 452
Sun 4/57:00 a.m.YTZ - DEN
2 stops23h 00mMultiple Airlines
Thu 8/53:42 p.m.DEN - YTZ
1 stop18h 40mMultiple Airlines
Deal found 20/4C$ 467
Wed 25/68:05 a.m.YUL - DEN
Nonstop4h 16mUnited Airlines
Wed 9/75:40 p.m.DEN - YUL
Nonstop3h 46mUnited Airlines
Deal found 20/4C$ 471

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 22 April 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

TorontoColorado Springs

YYZ - COS

YYZCOS

Toronto Pearson Intl

Thu 4/9

6:30 a.m.-10:44 a.m.

1 stop6h 14m

Colorado Springs

Mon 8/9

6:00 a.m.-10:58 p.m.

2 stops14h 58m

C$ 352

MontrealColorado Springs

YUL - COS

YULCOS

Montreal Pierre Elliott Trudeau Intl

Thu 18/9

12:45 p.m.-9:20 p.m.

1 stop10h 35m

Colorado Springs

Mon 22/9

6:00 a.m.-9:26 p.m.

2 stops13h 26m

C$ 376

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Sat 19/7

3:45 p.m.-11:27 a.m.

1 stop21h 42m

Denver Intl

Sun 27/7

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

1 stop9h 05m

C$ 378

HamiltonDenver

YHM - DEN

YHMDEN

Hamilton

Sun 17/8

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

1 stop14h 52m

Denver Intl

Sat 23/8

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

1 stop10h 26m

C$ 381

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Wed 25/6

6:45 a.m.-11:27 a.m.

2 stops30h 42m

Denver Intl

Wed 9/7

12:15 p.m.-12:43 a.m.

1 stop10h 28m

C$ 390

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Sun 4/5

9:45 a.m.-9:57 a.m.

1 stop26h 12m

Denver Intl

Thu 8/5

12:15 p.m.-10:56 p.m.

1 stop8h 41m

C$ 391

TorontoDenver

YKF - DEN

YKFDEN

Toronto Region of Waterloo Intl

Fri 1/8

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

1 stop14h 52m

Denver Intl

Tue 5/8

12:15 p.m.-12:46 a.m.

1 stop10h 31m

C$ 398

TorontoDenver

YYZ - DEN

YYZDEN

Toronto Pearson Intl

Thu 10/7

10:20 p.m.-11:27 a.m.

2 stops15h 07m

Denver Intl

Mon 14/7

12:15 p.m.-5:51 a.m.

2 stops15h 36m

C$ 401

MontrealColorado Springs

YUL - COS

YULCOS

Montreal Pierre Elliott Trudeau Intl

Wed 21/5

8:05 a.m.-5:54 p.m.

1 stop11h 49m

Colorado Springs

Sun 25/5

5:30 a.m.-11:26 p.m.

1 stop15h 56m

C$ 416

MontrealDenver

YUL - DEN

YULDEN

Montreal Pierre Elliott Trudeau Intl

Fri 23/5

8:05 a.m.-10:27 a.m.

Nonstop4h 22m

Denver Intl

Fri 30/5

5:40 p.m.-11:26 p.m.

Nonstop3h 46m

C$ 452

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/4

Showing 1-10 of 54 results
1
2
3
...
6

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 22 April 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.

Weekly flight availability from Region of Ontario to Colorado

Explore weekly flight availability from Ontario to Colorado. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 22 April 2025.

The most flights from CAON to USCO are scheduled on a Monday (10 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).

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 22 April 2025.
See what other customers who have flown with Alaska Airlines, Porter Airlines and Delta 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.

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
8.0
Very good

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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$ 152), Air Canada (C$ 198), and Delta (C$ 280).

  • 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 22 April 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 241AverageC$ 396FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 323AverageC$ 702FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 340AverageC$ 761FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.