COS - ONT

$124 Find Cheap Flights from Colorado Springs to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Colorado Springs to Ontario departing on 3/31. 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 Ontario

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

Cheapest round-trip
$197
Overall average: $370
Delta
Tue 2/17Wed 2/25
COS - ONT • 1 stop
Cheapest one-way
$124
Overall average: $213
American Airlines
Tue 3/31
COS - ONT • 1 stop
Top airlines
Delta
Cheapest • from $197 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 36% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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 Ontario!
Flight Deals
Booking Insights
Flight Deals

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

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

Tue, Feb 17 - Wed, Feb 25
Delta Logo
12:00 pm - 4:02 pm
COS
-
ONT
5h 02m
1 stop
Delta Logo
5:00 pm - 10:21 pm
ONT
-
COS
4h 21m
1 stop
$197Delta
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
5:13 pm - 8:36 pm
COS
-
ONT
4h 23m
1 stop
United Airlines Logo
5:10 am - 11:05 am
ONT
-
COS
4h 55m
1 stop
$213United Airlines
Tue, Apr 14 - Tue, Apr 21
Delta Logo
11:55 am - 10:37 pm
COS
-
ONT
11h 42m
2 stops
Delta Logo
6:00 am - 11:12 am
ONT
-
COS
4h 12m
1 stop
$251Delta
Thu, Feb 19 - Wed, Feb 25
American Airlines Logo
4:49 pm - 10:29 pm
COS
-
ONT
6h 40m
1 stop
American Airlines Logo
2:39 pm - 10:10 pm
ONT
-
COS
6h 31m
1 stop
$258American Airlines
Wed, Feb 18 - Wed, Feb 25
United Airlines Logo
5:05 pm - 8:50 pm
COS
-
ONT
4h 45m
1 stop
United Airlines Logo
5:00 am - 10:52 am
ONT
-
COS
4h 52m
1 stop
$267United Airlines
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
3:40 pm - 8:50 pm
COS
-
ONT
6h 10m
1 stop
United Airlines Logo
5:00 am - 12:31 pm
ONT
-
COS
6h 31m
1 stop
$283United Airlines
Mon, May 18 - Tue, May 19
United Airlines Logo
5:12 pm - 8:36 pm
COS
-
ONT
4h 24m
1 stop
United Airlines Logo
5:00 am - 12:26 pm
ONT
-
COS
6h 26m
1 stop
$305United Airlines
Sat, Mar 28 - Mon, Apr 6
Southwest Logo
5:25 am - 9:50 am
COS
-
ONT
5h 25m
1 stop
Southwest Logo
5:25 pm - 11:55 pm
ONT
-
COS
5h 30m
1 stop
$310Southwest
Sat, Mar 28 - Mon, Apr 6
Southwest Logo
5:15 pm - 12:05 am
COS
-
ONT
7h 50m
2 stops
Southwest Logo
5:40 am - 10:30 am
ONT
-
COS
3h 50m
1 stop
$319Southwest
Tue, Apr 14 - Tue, Apr 21
Southwest Logo
6:00 am - 12:05 pm
COS
-
ONT
7h 05m
2 stops
Southwest Logo
12:10 pm - 8:45 pm
ONT
-
COS
7h 35m
2 stops
$329Southwest
Booking Insights

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Colorado Springs to Ontario, 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 Colorado Springs to Ontario is January, where tickets cost $232 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is $485 and $426 respectively.

Good to know

Low seasonApril
Cheapest flight$124
Best time to beat the crowds but there is an average 18% increase in price.
Most popular time to fly with an average 14% increase in price.
Flight from Colorado Springs to Ontario

When to book flights from Colorado Springs to Ontario

Are your dates flexible? Find out the best times to travel from Colorado Springs to Ontario 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 Colorado Springs to Ontario

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

    In the last 3 days, the lowest price for a flight from Colorado Springs to Ontario was $89 for a one-way ticket and $197 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Colorado Springs to Ontario are Southwest and Delta. With an average price for the route of $386 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 $288 and an overall rating of 7.9.

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

    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 Colorado Springs to Ontario.

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

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

    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 Ontario with an airline and back to Colorado Springs with another airline. Booking your flights between Colorado Springs and ONT 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 Colorado Springs to Ontario?

    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 Ontario from Colorado Springs 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 Colorado Springs to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Colorado Springs to Ontario. 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 Colorado Springs to Ontario? 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 4267 reviews
8.1Boarding
7.0Food
7.5Entertainment
8.0Comfort
8.6Crew
Airline reviews

3 hour delay. Had to change plans and was still delayed.

2.0 MediocreAnonymous, Jan 2026
SFO - SAN
Read more Southwest reviews

3 hour delay. Had to change plans and was still delayed.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Connecting flight is on time and boarding was a breeze!

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

Gate agent rushed to fill hot jetway with crowd so it took over 12 minutes to go from gate to plane. Just like a discount airline Pooly prepared cabin and third time that claim of rough air prevented any cabin service. Friends on a Southwest flight at similar time had service.

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

The seats got pretty uncomfortable pretty fast. The armrests are bigger than on other planes, so I had less room in the actual seat. My butt hurt by the end of the flight. :/ comfort was the primary issue. The crew were fantastic!

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Flight was late - I was downgraded from first class to coach

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Flight was timely, relatively comfortable, with decent entertainment and food served. Only problem encountered was with the free messaging which I highly appreciate, but it did not work from iphone to non-iphones.

Everything you need to know for your flight from Colorado Springs to Ontario

Information on your arrival and departure airports