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Cheap flights from Colorado to Ontario from C$ 121

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 25/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — YYZ
26 Jan — 2 Feb1
1 adult

Cheap flight deals from Colorado to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Colorado (USCO) to Ontario (CAON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 January 2025.

Round-trip from

C$ 358

One-way from

C$ 121

Good round-trip deal

C$ 455 or less

Good one-way deal

C$ 294 or less
24/2-28/2
  • 24/2-28/2
  • 2 total stops
  • 18h 17m total
  • Colorado to Ontario
Search Deals
25/2
  • 25/2
  • 1 total stop
  • 11h 29m total
  • Colorado to Ontario
Search Deals
Price to beat on a round-trip flight from Colorado to Ontario.
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Price to beat on a one-way flight from Colorado to Ontario.
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Find flight deals from Colorado to Ontario

Cheapest flights from Colorado to Ontario
Explore the most affordable flight options available from Colorado to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2025.

Mon 24/27:34 p.m.DEN - YYZ
1 stop8h 21mMultiple Airlines
Fri 28/28:00 p.m.YYZ - DEN
1 stop9h 56mMultiple Airlines
Deal found 21/1C$ 358
Fri 21/210:44 p.m.DEN - YUL
1 stop15h 51mMultiple Airlines
Mon 24/28:55 a.m.YUL - DEN
2 stops26h 17mMultiple Airlines
Deal found 21/1C$ 463
Sat 1/38:55 p.m.DEN - YTZ
1 stop15h 02mMultiple Airlines
Thu 6/311:30 a.m.YTZ - DEN
2 stops21h 58mMultiple Airlines
Deal found 21/1C$ 472
Mon 10/35:16 p.m.COS - YUL
2 stops13h 16mUnited Airlines
Mon 17/38:05 a.m.YUL - COS
1 stop11h 44mUnited Airlines
Deal found 21/1C$ 564
Thu 3/710:20 a.m.DEN - YYZ
1 stop5h 10mSun Country Air
Sun 6/76:36 p.m.YYZ - DEN
1 stop16h 43mSun Country Air
Deal found 21/1C$ 576
Fri 21/26:54 a.m.DEN - YOW
2 stops15h 46mMultiple Airlines
Mon 24/24:25 p.m.YOW - DEN
1 stop18h 57mMultiple Airlines
Deal found 21/1C$ 590
Tue 4/37:00 a.m.DEN - YYZ
1 stop29h 55mAlaska Airlines
Fri 7/34:20 p.m.YYZ - DEN
1 stop33h 29mAlaska Airlines
Deal found 21/1C$ 615
Thu 5/612:15 p.m.DEN - YUL
1 stop10h 28mWestJet
Sun 8/67:00 a.m.YUL - DEN
1 stop13h 52mWestJet
Deal found 21/1C$ 620
Thu 5/612:15 p.m.DEN - YKF
1 stop10h 31mWestJet
Sun 8/66:00 a.m.YKF - DEN
1 stop14h 52mWestJet
Deal found 21/1C$ 672
Thu 5/612:15 p.m.DEN - YYZ
1 stop10h 09mWestJet
Sun 8/66:30 a.m.YYZ - DEN
1 stop14h 22mWestJet
Deal found 21/1C$ 697
Fri 7/35:40 p.m.DEN - YYZ
Nonstop3h 12mAir Canada
Fri 14/38:35 a.m.YYZ - DEN
Nonstop3h 53mAir Canada
Deal found 21/1C$ 705
Fri 4/411:59 p.m.DEN - YUL
1 stop11h 40mAmerican Airlines
Sat 5/43:40 p.m.YUL - DEN
1 stop8h 19mAmerican Airlines
Deal found 21/1C$ 711

Find flights from Colorado to Ontario within your budget

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, Cheapflights users made 629,999 searches. Data last updated 21 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Mon 24/2

7:34 p.m.-5:55 a.m.

1 stop8h 21m

Toronto Pearson Intl

Fri 28/2

8:00 p.m.-3:56 a.m.

1 stop9h 56m

C$ 358

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Fri 21/2

10:44 p.m.-4:35 p.m.

1 stop15h 51m

Montreal Pierre Elliott Trudeau Intl

Mon 24/2

6:45 a.m.-9:22 a.m.

2 stops28h 37m

C$ 458

DenverToronto

DEN - YTZ

DENYTZ

Denver Intl

Sat 1/3

8:55 p.m.-1:57 p.m.

1 stop15h 02m

Toronto Island

Thu 6/3

11:30 a.m.-7:28 a.m.

2 stops21h 58m

C$ 472

Colorado SpringsMontreal

COS - YUL

COSYUL

Colorado Springs

Mon 10/3

5:16 p.m.-8:32 a.m.

2 stops13h 16m

Montreal Pierre Elliott Trudeau Intl

Mon 17/3

8:05 a.m.-5:49 p.m.

1 stop11h 44m

C$ 564

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Thu 3/7

10:20 a.m.-5:30 p.m.

1 stop5h 10m

Toronto Pearson Intl

Sun 6/7

6:36 p.m.-9:19 a.m.

1 stop16h 43m

C$ 576

DenverOttawa

DEN - YOW

DENYOW

Denver Intl

Fri 21/2

6:54 a.m.-12:40 a.m.

2 stops15h 46m

Ottawa

Mon 24/2

4:25 p.m.-9:22 a.m.

1 stop18h 57m

C$ 590

DenverToronto

DEN - YYZ

DENYYZ

Denver Intl

Tue 4/3

7:00 a.m.-2:55 p.m.

1 stop29h 55m

Toronto Pearson Intl

Fri 7/3

4:20 p.m.-11:49 p.m.

1 stop33h 29m

C$ 615

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Thu 5/6

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

1 stop10h 28m

Montreal Pierre Elliott Trudeau Intl

Sun 8/6

7:00 a.m.-6:52 p.m.

1 stop13h 52m

C$ 620

DenverMontreal

DEN - YUL

DENYUL

Denver Intl

Fri 4/4

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

1 stop16h 14m

Montreal Pierre Elliott Trudeau Intl

Sat 5/4

3:40 p.m.-8:15 a.m.

1 stop18h 35m

C$ 665

DenverToronto

DEN - YKF

DENYKF

Denver Intl

Thu 5/6

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

1 stop10h 31m

Toronto Region of Waterloo Intl

Sun 8/6

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

1 stop14h 52m

C$ 672

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/1

Showing 1-10 of 53 results
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Best time to book a flight from Colorado to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Colorado 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.

Travel insights for flights from Colorado to Ontario

Get recent, data-driven insights about flights from Colorado to Ontario including ideal travel times, pricing trends, and more.

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

Currently, January is the cheapest month in which you can book a flight from Colorado to Region of Ontario (average of C$ 168). Flying from Colorado to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 CO to ON?

Find hourly flight availability from Colorado to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 January 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Region of Ontario as you normally would.

Weekly flight availability from Colorado to Region of Ontario

Explore weekly flight availability from Colorado to Ontario. 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 21 January 2025.

The most flights from USCO to CAON are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Region of Ontario, 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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated 21 January 2025.
Get a feel of what it's like to fly with Air Canada, Delta and United Airlines from Colorado to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

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

Alaska Airlines
8.0
Very good
9,706 reviews
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

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

Delta
8.0
Very good
8,521 reviews
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

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

Porter Airlines
7.9
Good
277 reviews
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

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

United Airlines
7.4
Good
8,984 reviews
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

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

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,706 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.1

Comfort

7.9

Crew

8.5

Entertainment

7.1

Reviews

1 / 10

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 Colorado to Ontario. 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 Colorado to Region of Ontario one-way?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 292. Users have also found prices from C$ 308 and C$ 321 on Delta and American Airlines, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Colorado to Ontario 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 Colorado to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from Colorado to Region of Ontario (average of C$ 168). Flying from Colorado to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 Colorado to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Colorado to Ontario

Discover the top 2 airlines that operate flights from Colorado to Ontario. 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 21 January 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 263AverageC$ 853FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 759AverageC$ 1,096FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ontario from Colorado today with Cheapflights!

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Colorado to Ontario.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Colorado to Ontario flexibly with Cheapflights today.

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

Not ready to book yet? You can track prices for flights from Colorado to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.

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