$223+ Cheap flights from Ottawa (YOW) to Denver (DEN)
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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — DEN
Jul 13 — Jul 201
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Ottawa to Denver 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 Ottawa to Denver
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ottawa to DenverExplore the most affordable flight options available from Ottawa to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 13, 2026.
Explore the most affordable flight options available from Ottawa to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 13, 2026.
This oojo deal was found by Cheapflights users on 6/11. 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.
Fri 7/176:55 am
YOW
- DEN
2 stops30h 25m
WestJet
Wed 7/2212:15 pm
DEN
- YOW
2 stops22h 15m
WestJet
Deal found 6/11![WestJet logo]()
$389
This oojo deal was found by Cheapflights users on 6/10. 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.
Fri 8/286:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Sun 8/3012:15 pm
DEN
- YOW
1 stop29h 05m
WestJet
Deal found 6/10![WestJet logo]()
$390
This oojo deal was found by Cheapflights users on 6/11. 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.
Thu 7/168:15 pm
YOW
- DEN
1 stop17h 05m
WestJet
Wed 7/2212:15 pm
DEN
- YOW
2 stops22h 15m
WestJet
Deal found 6/11![WestJet logo]()
$394
This oojo deal was found by Cheapflights users on 6/10. 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.
Wed 8/196:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Sat 8/2912:15 pm
DEN
- YOW
1 stop25h 05m
WestJet
Deal found 6/10![WestJet logo]()
$396
This oojo deal was found by Cheapflights users on 6/10. 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.
Thu 8/277:20 am
YOW
- DEN
1 stop30h 00m
WestJet
Sun 8/3012:15 pm
DEN
- YOW
2 stops34h 05m
WestJet
Deal found 6/10![WestJet logo]()
$402
This Justfly.com deal was found by Cheapflights users on 6/9. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/204:15 pm
YOW
- DEN
1 stop21h 05m
WestJet
Sun 8/2312:15 pm
DEN
- YOW
2 stops27h 20m
WestJet
Deal found 6/9![WestJet logo]()
$433
Best flights from Ottawa to DenverDiscover carefully curated flight deals from Ottawa to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 13, 2026.
Discover carefully curated flight deals from Ottawa to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 13, 2026.
This oojo deal was found by Cheapflights users on 6/9. 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.
Thu 8/208:15 pm
YOW
- DEN
1 stop17h 05m
WestJet
Sun 8/2312:15 pm
DEN
- YOW
1 stop15h 20m
WestJet
Deal found 6/9![WestJet logo]()
$407
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1712:25 pm
YOW
- DEN
2 stops13h 09m
Delta
Fri 8/2110:59 am
DEN
- YOW
2 stops11h 21m
Delta
Deal found 6/11![Delta logo]()
$462
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Thu 7/164:00 pm
YOW
- DEN
3 stops21h 20m
Multiple Airlines
Wed 7/2212:15 pm
DEN
- YOW
2 stops22h 15m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$531
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Thu 7/167:20 am
YOW
- DEN
1 stop30h 00m
WestJet
Wed 7/2212:15 pm
DEN
- YOW
1 stop25h 05m
WestJet
Deal found 6/11![WestJet logo]()
$415
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/912:25 pm
YOW
- DEN
2 stops13h 02m
Delta
Tue 7/146:05 am
DEN
- YOW
2 stops9h 30m
Delta
Deal found 6/10![Delta logo]()
$462
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1412:25 pm
YOW
- DEN
2 stops13h 02m
Delta
Wed 7/1512:59 am
DEN
- YOW
2 stops14h 36m
Delta
Deal found 6/12![Delta logo]()
$498
This WestJet deal was found by Cheapflights users on 6/8. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Sun 10/412:15 pm
DEN
- YOW
1 stop29h 05m
WestJet
Deal found 6/8![WestJet logo]()
$499
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:55 am
YOW
- DEN
2 stops8h 56m
Delta
Fri 10/212:50 am
DEN
- YOW
2 stops14h 45m
Delta
Deal found 6/12![Delta logo]()
$551
Last-minute flights from Ottawa to DenverDiscover last-minute flight deals from Ottawa to Denver. Data last updated June 13, 2026 and is based on user searches.
Discover last-minute flight deals from Ottawa to Denver. Data last updated June 13, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/912:25 pm
YOW
- DEN
2 stops13h 02m
Delta
Tue 7/146:05 am
DEN
- YOW
2 stops9h 30m
Delta
Deal found 6/10![Delta logo]()
$462
This oojo deal was found by Cheapflights users on 6/11. 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.
Thu 7/168:15 pm
YOW
- DEN
1 stop17h 05m
WestJet
Wed 7/2212:15 pm
DEN
- YOW
2 stops22h 15m
WestJet
Deal found 6/11![WestJet logo]()
$394
This oojo deal was found by Cheapflights users on 6/11. 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.
Fri 7/176:55 am
YOW
- DEN
2 stops30h 25m
WestJet
Wed 7/2212:15 pm
DEN
- YOW
2 stops22h 15m
WestJet
Deal found 6/11![WestJet logo]()
$389
This Booking.com deal was found by Cheapflights users on 6/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/276:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Wed 7/2912:15 pm
DEN
- YOW
2 stops27h 20m
WestJet
Deal found 6/9![WestJet logo]()
$438
One-way flights from Ottawa to DenverSearch for one-way flight options from Ottawa to Denver. Find affordable one-way fares based on user searches. Data last updated June 13, 2026.
Search for one-way flight options from Ottawa to Denver. Find affordable one-way fares based on user searches. Data last updated June 13, 2026.
This oojo deal was found by Cheapflights users on 6/11. 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.
Wed 7/86:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Deal found 6/11![WestJet logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Wed 9/231:20 pm
YOW
- DEN
2 stops16h 32m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Sun 10/412:25 pm
YOW
- DEN
3 stops37h 50m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$246
This Kiwi.com deal was found by Cheapflights users on 6/9. 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.
Wed 7/87:20 am
YOW
- DEN
3 stops16h 21m
Multiple Airlines
Deal found 6/9![Multiple Airlines logo]()
$251
This oojo deal was found by Cheapflights users on 6/11. 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.
Wed 9/237:20 am
YOW
- DEN
1 stop30h 00m
WestJet
Deal found 6/11![WestJet logo]()
$252
This Trip.com deal was found by Cheapflights users on 6/10. 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.
Thu 7/212:25 pm
YOW
- DEN
3 stops38h 13m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/26:55 am
YOW
- DEN
2 stops15h 07m
Delta
Deal found 6/10![Delta logo]()
$301
This Air Canada deal was found by Cheapflights users on 6/11. 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.
Sun 10/46:00 am
YOW
- DEN
1 stop6h 31m
Air Canada
Deal found 6/11![Air Canada logo]()
$328
This Air Canada deal was found by Cheapflights users on 6/13. 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.
Thu 7/26:00 am
YOW
- DEN
1 stop6h 33m
Air Canada
Deal found 6/13![Air Canada logo]()
$337
Find flight deals from Ottawa to Denver
Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Denver (DEN). 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 June 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $389 (oojo) |
One-way from | $223 (oojo) |
Popular in | January |
Cheapest in | February |
Average price | $578 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ottawa to Denver 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 June 13, 2026.
Use the filters below to find and compare flights from Ottawa to Denver that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Thu 8/20
8:15 pm-11:20 am
1 stop17h 05m
Denver Intl
Sun 8/23
12:15 pm-5:35 am
1 stop15h 20m
$407
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Thu 7/16
7:20 am-11:20 am
1 stop30h 00m
Denver Intl
Wed 7/22
12:15 pm-3:20 pm
1 stop25h 05m
$415
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Mon 8/17
12:25 pm-11:34 pm
2 stops13h 09m
Denver Intl
Fri 8/21
10:59 am-12:20 am
2 stops11h 21m
$462
Quickest round-trip
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Thu 7/9
12:25 pm-11:27 pm
2 stops13h 02m
Denver Intl
Tue 7/14
6:05 am-5:35 pm
2 stops9h 30m
$462
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Tue 7/14
12:25 pm-11:27 pm
2 stops13h 02m
Denver Intl
Wed 7/15
12:59 am-5:35 pm
2 stops14h 36m
$498
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Thu 10/1
6:15 pm-11:20 am
2 stops19h 05m
Denver Intl
Sun 10/4
12:15 pm-7:20 pm
1 stop29h 05m
$499
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Thu 7/16
4:00 pm-11:20 am
3 stops21h 20m
Denver Intl
Wed 7/22
12:15 pm-12:30 pm
2 stops22h 15m
$531
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Wed 9/30
6:55 am-1:51 pm
2 stops8h 56m
Denver Intl
Fri 10/2
12:50 am-5:35 pm
2 stops14h 45m
$551
Cheapest one-way
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Sun 10/4
12:25 pm-12:15 am
3 stops37h 50m
$246
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Wed 7/8
7:20 am-9:41 pm
3 stops16h 21m
$251
Showing 1-10 of 18 resultsSorted by cheapest first
Compare providers for flights from Ottawa to Denver
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to Denver in June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ottawa-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ottawa-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ottawa-Denver flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ottawa-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ottawa to Denver
Have a flexible travel schedule? Discover the best time to fly to Denver from Ottawa with our price prediction graph.
YOW-DEN
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 Ottawa to Denver
How far ahead should I book a flight from Ottawa to Denver?
The price you pay for your flight from Ottawa to Denver may vary depending on when you book. For the best chance of a lower fare, look to book 38 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Ottawa to Denver?
Currently, February is the cheapest month in which you can book a flight from Ottawa to Denver (average of $316). Flying from Ottawa to Denver in January is currently the most expensive (average of $884). 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.
How much does it cost to fly round-trip from Ottawa to Denver?
Reviews of airlines servicing Denver
Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated June 13, 2026.
See what other customers who have flown with United Airlines and Air Canada from Ottawa to Denver have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.3
Food
6.6
Crew
8.1
Overall
7.4
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
6.0
GoodGerry,Jan 2026
YVR - DEN
Comfort
7.3
Food
6.6
Crew
8.1
Overall
7.4
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
6.0
GoodGerry,Jan 2026
YVR - DEN
Comfort
7.3
Food
6.6
Crew
8.1
Overall
7.4
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
6.0
GoodGerry,Jan 2026
YVR - DEN
Related info for your journey
Find useful and relevant information for your journey from Ottawa to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Denver?
Book flights to Denver if you plan to visit one of these locationsThornton
Black Hawk
Westminster
Lakewood
Centennial
Broomfield
Golden
Greeley
Fort Morgan
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
Winter Park
Manitou Springs
Frisco
Englewood
Glendale
Evergreen
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
Complete your trip
Denver flight routes
Flights by cabin class
Other flight options
Other flights from Ottawa
Popular flights
Alternative routes for Ottawa to Denver
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Denver by adding a car rental and/or hotel reservation to your travel itinerary.
Other flights to Denver
Explore flights to Denver departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 13, 2026.
Search flights from Ottawa to Denver by cabin class
Find flights from Ottawa to Denver, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ottawa and Denver flights
Browse other Ottawa and Denver flight options. Last updated on June 13, 2026.
Other flights from Ottawa
Browse through other flights departing from Ottawa. Flights are based on user searches made on Cheapflights and were last updated on June 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Ottawa to Denver
Discover the top 2 airlines that operate flights from Ottawa to Denver. 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 June 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$251 | Average$496 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$312 | Average$655 | FlexibilityNo cancel fee | On-time67% |