$220+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — DEN
Aug 25 — Sep 11
Round-trip
1 adult, Economy
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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
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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
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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 July 26, 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 July 26, 2026.
This oojo deal was found by Cheapflights users on 7/22. 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.
Tue 8/256:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Mon 8/3112:15 pm
DEN
- YOW
2 stops22h 15m
WestJet
Deal found 7/22![WestJet logo]()
$392
This oojo deal was found by Cheapflights users on 7/24. 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.
Sat 8/291:20 pm
YOW
- DEN
1 stop24h 00m
WestJet
Tue 9/112:15 pm
DEN
- YOW
2 stops22h 15m
WestJet
Deal found 7/24![WestJet logo]()
$410
This oojo deal was found by Cheapflights users on 7/21. 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 8/266:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Mon 8/3112:15 pm
DEN
- YOW
2 stops22h 15m
WestJet
Deal found 7/21![WestJet logo]()
$423
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/198:15 pm
YOW
- DEN
1 stop17h 05m
WestJet
Wed 8/2612:15 pm
DEN
- YOW
1 stop10h 25m
WestJet
Deal found 7/22![WestJet logo]()
$427
This oojo deal was found by Cheapflights users on 7/21. 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 8/276:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Sun 8/3012:15 pm
DEN
- YOW
2 stops27h 20m
WestJet
Deal found 7/21![WestJet logo]()
$431
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/264:15 pm
YOW
- DEN
1 stop21h 05m
Multiple Airlines
Sun 8/3011:59 pm
DEN
- YOW
2 stops12h 56m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$454
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 July 26, 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 July 26, 2026.
This oojo deal was found by Cheapflights users on 7/21. 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 8/276:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Sun 8/3012:15 pm
DEN
- YOW
1 stop27h 00m
WestJet
Deal found 7/21![WestJet logo]()
$431
This Delta deal was found by Cheapflights users on 7/24. 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.
Fri 9/1812:25 pm
YOW
- DEN
2 stops13h 10m
Delta
Thu 9/246:30 am
DEN
- YOW
2 stops15h 50m
Delta
Deal found 7/24![Delta logo]()
$492
This oojo deal was found by Cheapflights users on 7/21. 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 8/261:20 pm
YOW
- DEN
1 stop24h 00m
WestJet
Mon 8/3112:15 pm
DEN
- YOW
1 stop27h 00m
WestJet
Deal found 7/21![WestJet logo]()
$437
This Delta deal was found by Cheapflights users on 7/26. 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 9/96:55 am
YOW
- DEN
2 stops12h 26m
Delta
Wed 9/1611:10 am
DEN
- YOW
2 stops11h 10m
Delta
Deal found 7/26![Delta logo]()
$499
This Delta deal was found by Cheapflights users on 7/25. 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 9/86:55 am
YOW
- DEN
2 stops16h 18m
Delta
Tue 9/157:15 am
DEN
- YOW
2 stops15h 05m
Delta
Deal found 7/25![Delta logo]()
$535
This Delta deal was found by Cheapflights users on 7/25. 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 8/256:55 am
YOW
- DEN
2 stops14h 57m
Delta
Fri 8/2812:59 am
DEN
- YOW
2 stops14h 36m
Delta
Deal found 7/25![Delta logo]()
$544
This oojo deal was found by Cheapflights users on 7/25. 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.
Mon 8/176:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Fri 8/216:20 am
DEN
- YOW
2 stops21h 15m
WestJet
Deal found 7/25![WestJet logo]()
$664
Last-minute flights from Ottawa to DenverDiscover last-minute flight deals from Ottawa to Denver. Data last updated July 26, 2026 and is based on user searches.
Discover last-minute flight deals from Ottawa to Denver. Data last updated July 26, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/198:15 pm
YOW
- DEN
1 stop17h 05m
WestJet
Wed 8/2612:15 pm
DEN
- YOW
1 stop10h 25m
WestJet
Deal found 7/22![WestJet logo]()
$427
This oojo deal was found by Cheapflights users on 7/22. 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.
Tue 8/256:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Mon 8/3112:15 pm
DEN
- YOW
2 stops22h 15m
WestJet
Deal found 7/22![WestJet logo]()
$392
This oojo deal was found by Cheapflights users on 7/21. 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 8/266:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Mon 8/3112:15 pm
DEN
- YOW
2 stops22h 15m
WestJet
Deal found 7/21![WestJet logo]()
$423
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/264:15 pm
YOW
- DEN
1 stop21h 05m
Multiple Airlines
Sun 8/3011:59 pm
DEN
- YOW
2 stops12h 56m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$454
This oojo deal was found by Cheapflights users on 7/21. 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 8/276:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Sun 8/3012:15 pm
DEN
- YOW
2 stops27h 20m
WestJet
Deal found 7/21![WestJet logo]()
$431
This oojo deal was found by Cheapflights users on 7/24. 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.
Sat 8/291:20 pm
YOW
- DEN
1 stop24h 00m
WestJet
Tue 9/112:15 pm
DEN
- YOW
2 stops22h 15m
WestJet
Deal found 7/24![WestJet logo]()
$410
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 July 26, 2026.
Search for one-way flight options from Ottawa to Denver. Find affordable one-way fares based on user searches. Data last updated July 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Tue 9/16:00 am
YOW
- DEN
2 stops14h 00m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$220
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/121:20 pm
YOW
- DEN
2 stops16h 30m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$223
This oojo deal was found by Cheapflights users on 7/22. 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.
Sat 8/156:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Deal found 7/22![WestJet logo]()
$226
This oojo deal was found by Cheapflights users on 7/23. 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 9/36:15 pm
YOW
- DEN
2 stops19h 05m
WestJet
Deal found 7/23![WestJet logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Mon 8/316:55 am
YOW
- DEN
3 stops19h 15m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$233
This FlightHub deal was found by Cheapflights users on 7/23. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/104:15 pm
YOW
- DEN
1 stop21h 05m
WestJet
Deal found 7/23![WestJet logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Mon 8/318:15 pm
YOW
- DEN
1 stop17h 05m
WestJet
Deal found 7/23![WestJet logo]()
$237
This FlightHub deal was found by Cheapflights users on 7/23. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/21:20 pm
YOW
- DEN
1 stop24h 00m
WestJet
Deal found 7/23![WestJet logo]()
$240
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Tue 9/226:25 pm
YOW
- DEN
2 stops29h 24m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$242
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 July 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $392 (oojo) |
One-way from | $220 (Kiwi.com) |
Popular in | January |
Cheapest in | September |
Average price | $628 |
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 July 26, 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 8/27
6:15 pm-11:20 am
2 stops19h 05m
Denver Intl
Sun 8/30
12:15 pm-5:15 pm
1 stop27h 00m
$431
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Wed 8/26
1:20 pm-11:20 am
1 stop24h 00m
Denver Intl
Mon 8/31
12:15 pm-5:15 pm
1 stop27h 00m
$437
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Fri 9/18
12:25 pm-11:35 pm
2 stops13h 10m
Denver Intl
Thu 9/24
6:30 am-12:20 am
2 stops15h 50m
$492
Quickest round-trip
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Wed 9/9
6:55 am-5:21 pm
2 stops12h 26m
Denver Intl
Wed 9/16
11:10 am-12:20 am
2 stops11h 10m
$499
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Tue 9/8
6:55 am-9:13 pm
2 stops16h 18m
Denver Intl
Tue 9/15
7:15 am-12:20 am
2 stops15h 05m
$535
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Tue 8/25
6:55 am-7:52 pm
2 stops14h 57m
Denver Intl
Fri 8/28
12:59 am-5:35 pm
2 stops14h 36m
$544
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Mon 8/17
6:15 pm-11:20 am
2 stops19h 05m
Denver Intl
Fri 8/21
6:20 am-5:35 am
2 stops21h 15m
$664
Cheapest one-way
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Wed 8/12
1:20 pm-3:50 am
2 stops16h 30m
$223
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Sat 8/15
6:15 pm-11:20 am
2 stops19h 05m
$226
OttawaDenver
YOW - DEN
YOWDEN
Ottawa
Tue 9/22
6:25 pm-9:49 pm
2 stops29h 24m
$242
Showing 1-10 of 17 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 July.
| 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
What is the cheapest month to book a flight from Ottawa to Denver?
Currently, September is the cheapest month in which you can book a flight from Ottawa to Denver (average of $291). Flying from Ottawa to Denver in January is currently the most expensive (average of $906). 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?
Airfare is below average for this route at the moment.
Ottawa to Denver flights typically cost between $476 and $666 in August.The cheapest round-trip price found within the last 5 days was $392 on WestJet (Aug 25-Aug 31).
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 July 26, 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.
Entertainment
7.1
Comfort
7.3
Overall
7.4
Crew
8.1
Boarding
7.7
Food
6.6
Reviews
1 / 20
6.0
GoodGerry,Jan 2026
YVR - DEN
Entertainment
7.1
Comfort
7.3
Overall
7.4
Crew
8.1
Boarding
7.7
Food
6.6
Reviews
1 / 20
6.0
GoodGerry,Jan 2026
YVR - DEN
Entertainment
7.1
Comfort
7.3
Overall
7.4
Crew
8.1
Boarding
7.7
Food
6.6
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
Centennial
Lakewood
Broomfield
Golden
Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Fort Morgan
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
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Alternative routes for Ottawa to Denver
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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 July 26, 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 July 26, 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 July 26, 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 July 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$251 | Average$621 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$566 | Average$674 | FlexibilityNo cancel fee | On-time67% |