$203 Find Cheap Flights from Ottawa to Colorado

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ottawa to Colorado departing on 3/23. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Colorado

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ottawa to Colorado, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ottawa to Colorado, as well as popular online travel agencies
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Flight Deals

Book Cheap Ottawa to Colorado Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ottawa to Colorado that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ottawa to Colorado

Mon, Feb 23 - Wed, Feb 25
United Airlines Logo
10:30 am - 9:44 pm
YOW
-
COS
13h 14m
2 stops
United Airlines Logo
5:59 am - 9:18 pm
COS
-
YOW
13h 19m
2 stops
$373United Airlines
Mon, Mar 2 - Wed, Mar 4
Air Canada Logo
2:50 pm - 8:44 am
YOW
-
COS
19h 54m
2 stops
Air Canada Logo
3:40 pm - 1:38 am
COS
-
YOW
7h 58m
2 stops
$385Air Canada
Wed, Mar 4 - Wed, Mar 11
Multiple Airlines Logo
7:00 am - 9:35 pm
YOW
-
DEN
16h 35m
2 stops
Multiple Airlines Logo
9:25 am - 12:02 am
DEN
-
YOW
12h 37m
1 stop
$397Multiple Airlines
Tue, Mar 24 - Thu, Apr 2
Air Canada Logo
5:00 am - 2:20 pm
YOW
-
COS
11h 20m
2 stops
Air Canada Logo
1:33 pm - 1:34 am
COS
-
YOW
10h 01m
2 stops
$401Air Canada
Sat, Feb 28 - Sat, Mar 7
Multiple Airlines Logo
10:35 am - 9:00 pm
YOW
-
DEN
12h 25m
1 stop
Multiple Airlines Logo
11:49 pm - 4:25 pm
DEN
-
YOW
38h 36m
2 stops
$405Multiple Airlines
Fri, Apr 24 - Mon, Apr 27
Multiple Airlines Logo
6:45 am - 7:54 pm
YOW
-
DEN
15h 09m
2 stops
Multiple Airlines Logo
12:15 pm - 5:40 am
DEN
-
YOW
15h 25m
1 stop
$422Multiple Airlines
Mon, Mar 2 - Wed, Mar 4
Air Canada Logo
2:50 pm - 8:44 am
YOW
-
COS
19h 54m
2 stops
Air Canada Logo
3:40 pm - 8:18 am
COS
-
YOW
14h 38m
2 stops
$422Air Canada
Tue, Mar 24 - Fri, Mar 27
Delta Logo
5:40 am - 8:28 pm
YOW
-
COS
16h 48m
2 stops
Delta Logo
1:28 pm - 12:39 am
COS
-
YOW
9h 11m
2 stops
$427Delta
Mon, Mar 9 - Fri, Mar 13
Multiple Airlines Logo
4:20 pm - 8:20 am
YOW
-
DEN
18h 00m
1 stop
Multiple Airlines Logo
4:44 pm - 5:25 pm
DEN
-
YOW
22h 41m
2 stops
$451Multiple Airlines
Mon, Feb 23 - Wed, Feb 25
United Airlines Logo
2:15 pm - 10:02 pm
YOW
-
COS
9h 47m
2 stops
United Airlines Logo
11:36 am - 9:18 pm
COS
-
YOW
7h 42m
1 stop
$505United Airlines
Booking Insights

KAYAK's insights & trends for Ottawa to Colorado flights

Get data-powered insights and trends into flights from Ottawa to Colorado to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Ottawa to Colorado?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ottawa to Colorado, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ottawa to Colorado is September, when tickets cost $325 (return) on average. On the other hand, the most expensive months are January and December, when the average cost of round-trip tickets is $906 and $597 respectively.

How far in advance should I book a flight from Ottawa to Colorado?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ottawa to Colorado, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ottawa to Colorado, you should book around 5 weeks before departure, which saves you about 57% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonNovember
Cheapest flight$203
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 14% increase in price.
Flight from Ottawa to Denver

FAQs - booking Colorado flights

  • How does KAYAK find such low prices on flights from Ottawa to Colorado?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ottawa to Colorado.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ottawa to Colorado?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ottawa to Colorado is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ottawa to Colorado?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Ottawa to Colorado with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ottawa to Colorado?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Ottawa to Colorado up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Ottawa to Colorado

 
See real verified KAYAK customer reviews for airlines flying from Ottawa to Colorado. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ottawa to Colorado? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9254 reviews
8.1Crew
6.6Food
7.1Entertainment
7.3Comfort
7.7Boarding
Airline reviews

Very poor. The flight was delayed from Toronto because some forget to do there job . I got to my connecting gate in San Francisco 10 minutes before the departure.but this didn’t let me board even though the flight was still there for an other 30 minutes. The the gentleman at the unite airline desk told me that they usually wait for passengers but air Canada called and told them not to we I been rerouted to Manila instead of Hong Kong . In San Francisco they mad me check in my carryon bag . I was told the it will directly go yo ho chi minn cuyt but I was told that by the Vietnams airline desk that’s not there I’m 10 hours behind my scheduled flight and looks like I I’m going without baggage. I don’t have a chance of catching ..

2.0 MediocreAnonymous, Feb 2026
YYZ - SFO
Read more United Airlines reviews

Very poor. The flight was delayed from Toronto because some forget to do there job . I got to my connecting gate in San Francisco 10 minutes before the departure.but this didn’t let me board even though the flight was still there for an other 30 minutes. The the gentleman at the unite airline desk told me that they usually wait for passengers but air Canada called and told them not to we I been rerouted to Manila instead of Hong Kong . In San Francisco they mad me check in my carryon bag . I was told the it will directly go yo ho chi minn cuyt but I was told that by the Vietnams airline desk that’s not there I’m 10 hours behind my scheduled flight and looks like I I’m going without baggage. I don’t have a chance of catching ..

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

I just think it’s unfortunate that Airlines have completely abandoned the idea of serving any kind of decent or even real food on flights, not even on a four hour flight!? Those days are gone, I guess.

l really enjoy very much the flight was very pleasant

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Quick and seamless boarding. No entertainment but fast Starlink wifi for this short trip and the staff was really friendly.

I dread trans-Pacific flights. They are very long. This was my first time on Universal, and it was my best crossing ever. The staff were professional, the hospitality was great, and the food was delicious. The entertainment system filled the long flight hours. I will seek out Universal flights from now onwards. 🙂

We Left Calgary 1/2 hour late and that made for a tight connection in Denver. After arriving everything was done to help us make our connection. That was a great effort. Thank You United

It was a very small plane and was ok. No food or entertainment so there should be an option for NA.

We were happy with the service and cost of checking a bag

Wifi was great. Kind air crew and comfortable seating. Also liked the entertainment options.

Flying with Air Canada is still better than the discount airlines like Flair. The seats are more comfortable and the on-board entertainment is better, with each seat having a built in screen and lots of content to watch. Onboard WIFI is also great to have, as well as plugs for charging. I think passengers in general are getting better at not bringing too much luggage onboard, and Air Canada is better at managing this without customers feeling like they are being taken advantage of with extra fees. I have travelled on different airlines and all seem to be loading faster, with fewer people bringing both a carry on and a personal item. Now I just bring one item and it fits under the seat so I don't need to worry about finding a place in the overhead bins. Overall, across the industry, asking customers to pay for carry on baggage is fair because it allows customers to only pay for what they need, and it helps to keep the planes on time. Kudos to Air Canada for its approach - the desired result is achieved without customers feeling that they are being surprised and caught with unexpected extra fees.

Due to the strike by AC flight attendants, my flight was cancelled. Very disappointing! A refund is being processed. This was not a Kayak issue. I will be sure to come back to Kayak in the future.

I did not noticed baggage was separate - I had assumed international flights included luggage, so it surprised me I had to pay to check a bag.

Staff was very courteous and kept things organized. We will definitely use Air Canada for further travel

In a nutshell, my bag, the one I have to pay for, because now you can’t even bring a carry on, did not make it. I am still waiting for an update. The fact that not only were have to pay for it, but on top of that we are stuck without getting it, it’s ridiculous..

Great flights. 90 minute departure delay for maintenance issues, not a great start but, afer that very good. Didn't pay extra for seats and lucked into a window and an aisle seat. Price was excellent at the super low economy level.

Just a little improvement on food but everything is excellent

Everything you need to know for your flight from Ottawa to Colorado

Information on your arrival and departure airports