ONT - COS

$109 Find Cheap Flights from Ontario to Colorado Springs

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Colorado Springs departing on 10/9. 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

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

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

Cheap Flights from Ontario to Colorado Springs (ONT-COS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Colorado Springs 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 Ontario to Colorado Springs

Sat, Nov 15 - Mon, Nov 17
Southwest Logo
10:45 am - 3:25 pmONT-COS
3h 40m1 stop
Southwest Logo
2:25 pm - 8:45 pmCOS-ONT
7h 20m1 stop
$182Southwest
Find Deal
Thu, Nov 13 - Tue, Nov 18
American Airlines Logo
12:55 pm - 11:48 pmONT-COS
9h 53m2 stops
American Airlines Logo
5:45 am - 4:03 pmCOS-ONT
11h 18m2 stops
$187American Airlines
Find Deal
Sat, Nov 15 - Mon, Nov 17
Southwest Logo
5:30 am - 1:30 pmONT-COS
7h 00m2 stops
Southwest Logo
2:25 pm - 8:45 pmCOS-ONT
7h 20m1 stop
$188Southwest
Find Deal
Thu, Oct 16 - Sat, Oct 18
United Airlines Logo
6:27 pm - 11:52 pmONT-COS
4h 25m1 stop
United Airlines Logo
9:30 am - 12:51 pmCOS-ONT
4h 21m1 stop
$217United Airlines
Find Deal
Thu, Oct 16 - Sat, Oct 18
United Airlines Logo
6:27 pm - 11:52 pmONT-COS
4h 25m1 stop
United Airlines Logo
1:54 pm - 10:52 pmCOS-ONT
9h 58m2 stops
$222United Airlines
Find Deal
Fri, Oct 24 - Mon, Oct 27
Southwest Logo
5:55 pm - 10:35 pmONT-COS
3h 40m1 stop
Southwest Logo
8:10 pm - 11:00 pmCOS-ONT
3h 50m1 stop
$224Southwest
Find Deal
Fri, Oct 24 - Mon, Oct 27
Southwest Logo
4:20 pm - 11:20 pmONT-COS
6h 00m1 stop
Southwest Logo
6:15 pm - 11:00 pmCOS-ONT
5h 45m2 stops
$229Southwest
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Thu, Nov 13 - Tue, Nov 18
United Airlines Logo
5:05 am - 1:14 pmONT-COS
7h 09m1 stop
United Airlines Logo
5:05 pm - 8:44 pmCOS-ONT
4h 39m1 stop
$241United Airlines
Find Deal
Fri, Oct 24 - Sun, Oct 26
Delta Logo
4:35 pm - 10:10 pmONT-COS
4h 35m1 stop
Delta Logo
5:49 pm - 11:39 pmCOS-ONT
6h 50m1 stop
$321Delta
Find Deal
Mon, Nov 24 - Fri, Nov 28
Delta Logo
4:49 pm - 10:23 pmONT-COS
4h 34m1 stop
Delta Logo
8:00 am - 12:18 pmCOS-ONT
5h 18m1 stop
$360Delta
Find Deal

Everything you should know

Top airlines
Southwest
Cheapest • from $182 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 41% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
July
Cheapest • 22% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$182
Overall average: $416
Southwest
Sat 11/15Mon 11/17
ONT - COS • 1 stop
Cheapest one-way
$109
Typical prices: $122-234
United Airlines
Thu 10/9
ONT - COS • 1 stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Colorado Springs!
Booking Insights

KAYAK's insights & trends for Ontario to Colorado Springs flights

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

What’s the cheapest day of the week to fly from Ontario to Colorado Springs?

The average price of all round-trip flights from Ontario to Colorado Springs clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Ontario to Colorado Springs, look for departures on Wednesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Colorado Springs, Saturday is the cheapest day to fly and Thursday is the most expensive.

What is the cheapest month to fly from Ontario to Colorado Springs?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Colorado Springs, 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 Ontario to Colorado Springs is July, where tickets cost $280 (return) on average. On the other hand, the most expensive months are March and November, where the average cost of round-trip tickets is $420 and $416 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Colorado Springs, 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 Ontario to Colorado Springs, you should book around 4 weeks before departure, which saves you about 41% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$109
Best time to beat the crowds but there is an average 13% increase in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from Ontario to Colorado Springs

When to book flights from Ontario to Colorado Springs

Are your dates flexible? Find out the best times to travel from Ontario to Colorado Springs based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Colorado Springs

  • What is the cheapest flight from Ontario to Colorado Springs?

    In the last 3 days, the lowest price for a flight from Ontario to Colorado Springs was $109 for a one-way ticket and $182 for a round-trip.

  • Do I need a passport to fly between Ontario and Colorado Springs?

    No, a passport isn't needed to fly from Ontario to Colorado Springs. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Ontario to Colorado Springs?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Colorado Springs?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Ontario and Colorado Springs, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Colorado Springs, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Ontario to Colorado Springs are Southwest and Delta. With an average price for the route of $367 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $331 and an overall rating of 7.9.

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

    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 Ontario to Colorado Springs.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Colorado Springs from Ontario 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 Ontario to Colorado Springs?

    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 to Colorado Springs with an airline and back to Ontario with another airline. Booking your flights between Ontario and COS can sometimes prove cheaper using this method.

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

    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 to Colorado Springs from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Ontario to Colorado Springs

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Colorado Springs. 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 Ontario to Colorado Springs? 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.
8.0
SouthwestOverall score based on 4242 reviews
8.0Comfort
8.1Boarding
7.0Food
8.6Crew
7.5Entertainment
Airline reviews

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

10.0 ExcellentRobert, Sep 2025SFO - LAS
Read more Southwest reviews

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

The Southwest employees (all two of them) were very nice and cheerful despite the fact the line to self-check a bag (simply drop it off) was hundreds of people long. Thank God I arrived early to the airport because I stood in this line for at least an hour. Once on the flight that had been delayed by an hour, we had no Wi-Fi and thus no entertainment. Finally, I hope the investor strong arm tactics against Southwest pay off in a short-term windfall to your C-Suite because the rest of you are screwed. I have been a faithful Southwest customer for 15 years due to everything you just got rid of. I'm flying to Idaho and Washington in October, both places I used to simply book with Southwest without a second thought now with Frontier (Washington) and United (Idaho) because they offer everything the "new" Southwest does but cheaper and at better times, destinations, etc. This really makes me sad...

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Flights delayed by 4-6 hours. Boarding was a mess and unclear. Bags were not at arrival airport and had never even been put on the plane. No idea when I’ll get them. Don’t fly into Denver!

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

Terrible. They wouldn't allow me on my flight on the 14th..

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Excellent flight. Boarding was efficient and departure was on time. Smooth flight with on time arrival. Deplaning was also efficient.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

Very rough getting into denver. my kid threw up it was so rough.

Why wasn't this flight departure scheduled eith another crew so that it could leave on time? When we arrived in Denver we had so little time between flights we had run to the connecting flight. We should received some credit for the inconvenience.

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

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