COS - ONT

$178 Find Cheap Flights from Colorado Springs to Ontario - Compare and Save

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 9/10. 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

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Everything you should know

Cheapest round-trip
$351
Typical prices: $270-$374
Delta
Tue 9/8Wed 9/9
COS - ONT • 1 stop
Cheapest one-way
$178
Typical prices: $263-$343
Southwest
Thu 9/10
COS - ONT • 1 stop
Top airlines
Cheapest • from $351 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Colorado Springs and Ontario. You'll need at least 1 connection.
Insights
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Insights
Top layover airports
Cheapest • Avg $170 (round-trip)
Shortest trip • 3h 50m (one-way)
Insights
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Insights
When to travel
Cheapest • 45% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
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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, Sep 8 - Wed, Sep 9
Delta Logo
6:11 pm - 10:04 pm
COS
-
ONT
4h 53m
1 stop
Delta Logo
5:15 pm - 10:25 pm
ONT
-
COS
4h 10m
1 stop
$351Delta
Wed, Sep 9 - Sat, Sep 12
Delta Logo
6:11 pm - 10:04 pm
COS
-
ONT
4h 53m
1 stop
Delta Logo
5:15 pm - 10:25 pm
ONT
-
COS
4h 10m
1 stop
$351Delta
Wed, Sep 9 - Tue, Sep 15
Southwest Logo
6:55 am - 10:25 am
COS
-
ONT
4h 30m
1 stop
Southwest Logo
8:35 am - 3:40 pm
ONT
-
COS
6h 05m
1 stop
$351Southwest
Wed, Sep 2 - Wed, Sep 2
Southwest Logo
6:55 am - 10:25 am
COS
-
ONT
4h 30m
1 stop
Southwest Logo
2:10 pm - 7:05 pm
ONT
-
COS
3h 55m
1 stop
$351Southwest
Sat, Sep 12 - Sat, Sep 12
Delta Logo
8:15 am - 12:14 pm
COS
-
ONT
4h 59m
1 stop
Delta Logo
5:15 pm - 10:25 pm
ONT
-
COS
4h 10m
1 stop
$351Delta
Wed, Sep 2 - Wed, Sep 2
Southwest Logo
7:20 am - 10:15 am
COS
-
ONT
3h 55m
1 stop
Southwest Logo
1:10 pm - 7:55 pm
ONT
-
COS
5h 45m
1 stop
$351Southwest
Thu, Sep 10 - Tue, Sep 22
United Airlines Logo
1:03 pm - 8:01 pm
COS
-
ONT
7h 58m
2 stops
United Airlines Logo
5:00 am - 10:21 am
ONT
-
COS
4h 21m
1 stop
$358United Airlines
Wed, Nov 25 - Wed, Dec 2
United Airlines Logo
5:10 pm - 8:51 pm
COS
-
ONT
4h 41m
1 stop
United Airlines Logo
1:00 pm - 8:08 pm
ONT
-
COS
6h 08m
1 stop
$431United Airlines
Wed, Oct 21 - Sun, Oct 25
American Airlines Logo
7:57 am - 6:43 pm
COS
-
ONT
11h 46m
2 stops
American Airlines Logo
10:25 am - 9:37 am
ONT
-
COS
22h 12m
1 stop
$554American Airlines
Wed, Oct 21 - Sun, Oct 25
American Airlines Logo
7:57 am - 6:43 pm
COS
-
ONT
11h 46m
2 stops
American Airlines Logo
10:25 am - 9:37 am
ONT
-
COS
22h 12m
1 stop
$554American Airlines
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.

How much is a round-trip flight from Colorado Springs to Ontario?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Colorado Springs to Ontario departing in September.

Flight prices are typical for this route right now.

Flights to Ontario from Colorado Springs usually cost between $240 and $359 in September.
The lowest price found in the past 5 days was $351 on Southwest (Sep 9-Sep 15).

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 $196 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is $496 and $487 respectively.

Good to know

Low season

July

Cheapest flight

$178
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly and prices are also 21% lower on average.
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 5 days, the lowest price for a flight from Colorado Springs to Ontario was $178 for a one-way ticket and $351 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?

    Star Alliance, and SkyTeam are the airline alliances operating flights between Colorado Springs and Ontario, with Star Alliance 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 $352 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 $266 and an overall rating of 7.8.

  • 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 4227 reviews
8.6Crew
7.0Food
8.1Boarding
7.5Entertainment
8.0Comfort
Airline reviews

Poor customer service, no accommodation for passengers when the flight was delayed over 5 hours.

2.0 MediocreChristopher, Jul 2026
DEN - SJC
Read more Southwest reviews

Poor customer service, no accommodation for passengers when the flight was delayed over 5 hours.

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. Nothing about this flight was good.

It was just okay, no frills, basic transportation with no luxury. No screens on the seats, no water or drinks on a short flight. Full flight but at least it was on time.

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

Great no problem boarding suitcase on time for pick up

Our flight to Oakland was great bc the plane was new but it was delayed by 15min not bad at all. Over all it was an 8/10

Delay after delay after delay. Very disappointing I am about ready to give up on Southwest. One of the crewmembers sat and played games on her phone for the entire trip from Chicago to Baltimore. Unbelievable, very unprofessional, and very disappointing.

I've never flown Southwest before and I can say its my new favorite airline.

The flight in it self was good. The delays looking for pilots was unexpected.

Delta is always late. Ruined our first day of a short vacation. Timing is important. We pay to stay on an itinerary

We never made it on this flight because we missed our connection due to o delayed flight from Jackson.

We got stuck on the tarmac taxiing after landing early so we didn’t get off the plane until an hour later than we thought we would

It was okay. We were delayed for weather reasons, but the pilots and the flight control staff figured a way around the storm and were able to get us to Los Angeles safely. Not all the staff members were polite, but the entertainment on the flight was good.

Crew was real good, flight was smooth and came in early.

Love me some Delta. One of the few airlines to recognize and support veterans. Easy boarding, flight was on time and arrived early and the flight attendants were excellent on this flight.

We sat on the runway for over an hour before departure. That was unwelcome.

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

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!

Destroyed my suitcase. Tired of talking about it. Cancelling my unite mileage plus account.

New plane was lovely. Crew customer service is always lax but expected. Kraft on time and arrived safely.

Wonderful in-seat entertainment with seatback screens and huge selection of quality movies. The ability to bluetooth connect headphones was amazing.

Both of my flights arrived early and check in process was smooth

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

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

Flight home lot's of room shame I never noticed that they ripped my suitcase and didn't notice it to I got toy destination and had to buy new set

It was delayed several hours which delayed our connection in Denver. Not happy.

Airline did not explain reasons why flight was delayed two hours. Explanations were badly needed and rarely provided. Problem seemed to clearly be the airline’s fault and not the fault of the weather or airport.

Ridiculous delays with weak excuses. United needs to do their job and troubleshoot. The rate they charge demands no less. Planes are way too full and seats are cramped. Charging for seats and luggage adds insult to injury.

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

Information on your arrival and departure airports