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Cheap flights from Ontario to Colorado from C$ 214

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — DEN
28 Aug — 4 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Colorado

Enter your travel dates to find the best prices.

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 29 July 2026.

Tue 25/812:55 p.m.
YYZ
-
DEN
1 stop20h 39m
Multiple Airlines
Thu 3/98:31 a.m.
DEN
-
YYZ
1 stop11h 24m
Multiple Airlines
Deal found 28/7C$ 543
Sat 5/96:10 p.m.
YHM
-
DEN
1 stop19h 10m
WestJet
Mon 7/912:15 p.m.
DEN
-
YHM
1 stop27h 00m
WestJet
Deal found 27/7C$ 545
Wed 2/93:50 p.m.
YYZ
-
DEN
1 stop21h 30m
WestJet
Mon 7/912:15 p.m.
DEN
-
YYZ
1 stop28h 40m
WestJet
Deal found 28/7C$ 545
Fri 14/83:50 p.m.
YYZ
-
DEN
2 stops19h 49m
Multiple Airlines
Mon 17/88:01 a.m.
DEN
-
YYZ
1 stop11h 54m
Multiple Airlines
Deal found 24/7C$ 546
Tue 18/88:40 p.m.
YKF
-
DEN
1 stop16h 40m
WestJet
Wed 26/812:15 p.m.
DEN
-
YKF
1 stop29h 35m
WestJet
Deal found 24/7C$ 547
Sat 5/91:45 p.m.
YTZ
-
DEN
1 stop29h 00m
Multiple Airlines
Mon 14/95:56 p.m.
DEN
-
YTZ
1 stop18h 29m
Multiple Airlines
Deal found 28/7C$ 547
Mon 17/88:40 p.m.
YKF
-
DEN
1 stop16h 40m
WestJet
Mon 24/812:15 p.m.
DEN
-
YKF
1 stop29h 35m
WestJet
Deal found 25/7C$ 550
Tue 18/89:00 a.m.
YYZ
-
DEN
1 stop28h 20m
WestJet
Tue 25/812:15 p.m.
DEN
-
YYZ
1 stop8h 30m
WestJet
Deal found 28/7C$ 550
Wed 2/96:10 p.m.
YHM
-
DEN
1 stop19h 10m
WestJet
Sun 6/912:15 p.m.
DEN
-
YHM
1 stop27h 00m
WestJet
Deal found 27/7C$ 553
Tue 29/99:55 a.m.
YYZ
-
DEN
1 stop10h 38m
Multiple Airlines
Wed 30/910:38 a.m.
DEN
-
YYZ
1 stop9h 17m
Multiple Airlines
Deal found 27/7C$ 553
Thu 20/88:55 a.m.
YTZ
-
DEN
1 stop9h 50m
Multiple Airlines
Wed 26/810:43 a.m.
DEN
-
YTZ
2 stops24h 12m
Multiple Airlines
Deal found 29/7C$ 554
Sat 7/117:00 a.m.
YYZ
-
DEN
1 stop19h 15m
Multiple Airlines
Wed 11/1110:30 p.m.
DEN
-
YYZ
1 stop30h 20m
Multiple Airlines
Deal found 28/7C$ 554

Find flight deals from Ontario to Colorado

Keep the following information in mind while searching for Ontario to Colorado flight deals. Data was last updated 29 July 2026.

Round-trip from

C$ 543

One-way from

C$ 214

Popular in

February

Cheapest in

November

Average price

C$ 698

Good round-trip deal

C$ 673 or less

Good one-way deal

C$ 444 or less
25/8-3/9
  • 25/8-3/9
  • 2 total stops
  • 32h 03m total
  • Ontario to Colorado
Search Deals
16/9
  • 16/9
  • 1 total stop
  • 8h 26m total
  • Ontario to Colorado
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Ontario to Colorado.
Search Deals
Price to beat on a one-way flight from Ontario to Colorado.
Search Deals

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 29 July 2026.
Use the filters below to find and compare flights from Ontario to Colorado that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoDenver

YKF - DEN

YKFDEN

Toronto Region of Waterloo Intl

Fri 4/9

8:40 p.m.-11:20 a.m.

1 stop16h 40m

Denver Intl

Mon 7/9

12:15 p.m.-7:50 p.m.

1 stop29h 35m

C$ 564

HamiltonDenver

YHM - DEN

YHMDEN

Hamilton

Mon 31/8

6:10 p.m.-11:20 a.m.

1 stop19h 10m

Denver Intl

Mon 7/9

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

1 stop27h 00m

C$ 564

MontrealColorado Springs

YUL - COS

YULCOS

Montreal Pierre Elliott Trudeau Intl

Sat 12/9

7:00 a.m.-12:14 p.m.

1 stop7h 14m

Colorado Springs

Sat 19/9

12:55 p.m.-11:50 p.m.

1 stop8h 55m

C$ 573

MontrealColorado Springs

YUL - COS

YULCOS

Montreal Pierre Elliott Trudeau Intl

Tue 25/8

6:10 a.m.-10:33 a.m.

1 stop6h 23m

Colorado Springs

Wed 26/8

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

2 stops10h 00m

C$ 573

MontrealColorado Springs

YUL - COS

YULCOS

Montreal Pierre Elliott Trudeau Intl

Tue 25/8

7:00 a.m.-12:15 p.m.

1 stop7h 15m

Colorado Springs

Wed 26/8

1:20 p.m.-11:52 p.m.

1 stop8h 32m

C$ 573

TorontoColorado Springs

YYZ - COS

YYZCOS

Toronto Pearson Intl

Sat 26/9

11:00 a.m.-5:45 p.m.

2 stops8h 45m

Colorado Springs

Wed 30/9

12:01 p.m.-8:44 p.m.

1 stop6h 43m

C$ 577

HamiltonDenver

YHM - DEN

YHMDEN

Hamilton

Tue 18/8

6:10 p.m.-11:20 a.m.

1 stop19h 10m

Denver Intl

Tue 25/8

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

1 stop27h 00m

C$ 581

TorontoDenver

YTZ - DEN

YTZDEN

Toronto Island

Sat 22/8

8:50 a.m.-4:45 p.m.

1 stop9h 55m

Denver Intl

Fri 28/8

4:28 p.m.-12:55 p.m.

1 stop18h 27m

C$ 595

TorontoColorado Springs

YYZ - COS

YYZCOS

Toronto Pearson Intl

Tue 25/8

2:45 p.m.-9:56 p.m.

2 stops9h 11m

Colorado Springs

Fri 28/8

11:55 a.m.-8:44 p.m.

1 stop6h 49m

C$ 604

OttawaDenver

YOW - DEN

YOWDEN

Ottawa

Fri 4/9

4:15 p.m.-11:20 a.m.

1 stop21h 05m

Denver Intl

Mon 7/9

12:15 p.m.-3:20 p.m.

1 stop25h 05m

C$ 608

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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, September is the cheapest month in which you can book a flight from Region of Ontario to Colorado (average of C$ 597). Flying from Region of Ontario to Colorado in January is currently the most expensive (average of C$ 934). 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 29 July 2026.

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 29 July 2026.

The most flights from CAON to USCO are scheduled on a Monday (10 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost to fly round-trip from Region of Ontario to Colorado?

Airfare is below average for this route at the moment.
Region of Ontario to Colorado flights typically cost between C$ 586 and C$ 797 in August.
The cheapest round-trip price found within the last 5 days was C$ 543 on Multiple Airlines (25 Aug-3 Sep).

How far ahead should I book a flight from Region of Ontario to Colorado?

The price you pay for your flight from Region of Ontario to Colorado may vary depending on when you book. For the best chance of a lower fare, look to book 45 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 29 July 2026.
Get a feel of what it's like to fly with United Airlines,WestJet, andAmerican Airlines from Ontario to Colorado by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,052 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
10,052 reviews
United Airlines
7.4
Good
10,052 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
WestJet
7.2
Good
3,415 reviews
United Airlines
7.4
Good
10,052 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
American Airlines
7.1
Good
11,839 reviews
United Airlines
7.4
Good
10,052 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
Air Canada
7.1
Good
11,406 reviews
United Airlines
7.4
Good
10,052 reviews
Check prices

Boarding

7.7

Overall

7.4

Crew

8.1

Food

6.6

Entertainment

7.1

Comfort

7.3

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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.

  • How long is the flight from Region of Ontario to Colorado?

    A quick flight from Region of Ontario to Colorado can take about 6h 23m. WestJet provides one of the quickest options available for as low as C$ 573. There are 2638 km between Region of Ontario and Colorado. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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, September is the cheapest month in which you can book a flight from Region of Ontario to Colorado (average of C$ 597). Flying from Region of Ontario to Colorado in January is currently the most expensive (average of C$ 934). 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

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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.
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Top 4 airlines flying from Ontario to Colorado

Discover the top 4 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 29 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 311AverageC$ 758FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 412AverageC$ 458FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 440AverageC$ 711FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapestC$ 785AverageC$ 820FlexibilityNo cancel feeOn-time71%
Search American 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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