$54+ Cheap flights from Colorado to Ontario
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 5/31. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Colorado to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Colorado to Ontario
Keep the following information in mind while searching for Colorado to Ontario flight deals. Data was last updated April 17, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $162 (Mytrip) |
One-way from | $54 (Kiwi.com) |
Popular in | November |
Cheapest in | March |
Average price | $542 |
Good round-trip deal | $593 or less |
Good one-way deal | $408 or less |
Find flight deals from Colorado to Ontario
Cheapest flights from Colorado to OntarioExplore 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 April 17, 2025.
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 April 17, 2025.
This Mytrip deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Trip.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This oojo deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Air Canada deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This oojo deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Trip.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Trip.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Air Canada deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
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 2,558,603 searches. Data last updated April 17, 2025.
Use the filters below to find and compare flights from Colorado to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
DenverLondon
DEN - YXU
DENYXU
Denver Intl
Thu 5/22
7:40 pm-5:14 am
1 stop7h 34m
London
Wed 5/28
6:15 am-10:30 am
1 stop6h 15m
DenverLondon
DEN - YXU
DENYXU
Denver Intl
Fri 5/30
7:40 pm-5:14 am
1 stop7h 34m
London
Fri 6/6
8:00 pm-11:27 am
1 stop17h 27m
DenverToronto
DEN - YKF
DENYKF
Denver Intl
Thu 5/22
7:40 pm-12:46 am
1 stop27h 06m
Toronto Region of Waterloo Intl
Thu 5/29
6:00 am-6:52 pm
1 stop14h 52m
DenverLondon
DEN - YXU
DENYXU
Denver Intl
Wed 5/28
7:45 am-3:03 pm
1 stop5h 18m
London
Sat 6/7
6:15 am-11:28 am
1 stop7h 13m
DenverToronto
DEN - YYZ
DENYYZ
Denver Intl
Sat 5/3
12:15 pm-6:14 am
1 stop15h 59m
Toronto Pearson Intl
Sun 5/11
10:25 pm-11:27 am
1 stop15h 02m
DenverLondon
DEN - YXU
DENYXU
Denver Intl
Tue 9/30
7:05 pm-9:17 am
2 stops12h 12m
London
Wed 10/8
6:15 am-11:58 am
1 stop7h 43m
DenverToronto
DEN - YYZ
DENYYZ
Denver Intl
Sat 5/24
1:33 pm-12:12 am
1 stop8h 39m
Toronto Pearson Intl
Sat 5/31
10:25 pm-11:27 am
1 stop15h 02m
DenverHamilton
DEN - YHM
DENYHM
Denver Intl
Thu 5/29
7:40 pm-12:41 am
1 stop27h 01m
Hamilton
Sun 6/1
6:00 am-6:52 pm
1 stop14h 52m
DenverOttawa
DEN - YOW
DENYOW
Denver Intl
Wed 6/4
12:15 pm-12:41 am
1 stop10h 26m
Ottawa
Fri 7/18
7:15 pm-11:27 am
1 stop18h 12m
DenverMontreal
DEN - YUL
DENYUL
Denver Intl
Wed 8/27
12:15 pm-12:43 am
1 stop10h 28m
Montreal Pierre Elliott Trudeau Intl
Sun 8/31
5:30 pm-11:24 am
1 stop19h 54m
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.
Cheapflights Insights
Everything you need to know about your flight from Colorado to Ontario
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 $243). Flying from Colorado to Region of Ontario in July is currently the most expensive (average of $359). 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 April 17, 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 April 17, 2025.
The most flights from USCO to CAON are scheduled on a Tuesday (10 on average). You will have fewer flight options on Wednesday, 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 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.
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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).
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 April 17, 2025.
Read through reviews of airlines operating flights from Colorado to Ontario, such as Delta, United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Crew
Food
Entertainment
Comfort
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
Boarding
Crew
Food
Entertainment
Comfort
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
Boarding
Crew
Food
Entertainment
Comfort
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
Boarding
Crew
Food
Entertainment
Comfort
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
Boarding
Crew
Food
Entertainment
Comfort
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
Boarding
Crew
Food
Entertainment
Comfort
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
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.
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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.
Top 3 airlines flying from Colorado to Ontario
Discover the top 3 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 2,558,603 searches. Data last updated April 17, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$130 | Average$460 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$150 | Average$295 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$160 | Average$572 | FlexibilityNo cancel fee | On-time69% |