HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$139+ Cheap flights from Colorado Springs to Ontario (COS - ONT)

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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ONT
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Colorado Springs to Ontario 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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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 Colorado Springs to Ontario

Cheapest flights from Colorado Springs to Ontario
Explore the most affordable flight options available from Colorado Springs to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 26, 2025.

This United Airlines deal was found by Cheapflights users on 12/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/265:10 pmCOS - ONT
1 stop4h 57mUnited Airlines
Sat 1/35:05 amONT - COS
1 stop7h 06mUnited Airlines
Deal found 12/25$632
This United Airlines deal was found by Cheapflights users on 12/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:38 pmCOS - ONT
1 stop6h 29mUnited Airlines
Tue 1/65:05 amONT - COS
1 stop4h 52mUnited Airlines
Deal found 12/23$668
This United Airlines deal was found by Cheapflights users on 12/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:38 pmCOS - ONT
1 stop6h 29mUnited Airlines
Wed 12/315:05 amONT - COS
1 stop7h 06mUnited Airlines
Deal found 12/23$694
This United Airlines deal was found by Cheapflights users on 12/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/268:20 amCOS - ONT
1 stop5h 18mUnited Airlines
Sat 12/271:40 pmONT - COS
1 stop5h 06mUnited Airlines
Deal found 12/24$717
This Southwest deal was found by Cheapflights users on 12/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/265:00 amCOS - ONT
1 stop6h 40mSouthwest
Sun 12/285:20 pmONT - COS
2 stops5h 55mSouthwest
Deal found 12/24$722
This American Airlines deal was found by Cheapflights users on 12/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:00 amCOS - ONT
2 stops11h 07mAmerican Airlines
Sun 12/286:20 amONT - COS
2 stops8h 34mAmerican Airlines
Deal found 12/25$727
This United Airlines deal was found by Cheapflights users on 12/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/283:38 pmCOS - ONT
1 stop6h 29mUnited Airlines
Tue 12/305:05 amONT - COS
1 stop7h 06mUnited Airlines
Deal found 12/24$768
This Southwest deal was found by Cheapflights users on 12/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:15 pmCOS - ONT
2 stops7h 00mSouthwest
Fri 12/261:40 pmONT - COS
2 stops8h 30mSouthwest
Deal found 12/24$832

Find flight deals from Colorado Springs to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Colorado Springs (COS) to Ontario (ONT). 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 December 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$205
(Delta)

One-way from

$139
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$485
Provider with most accurate pricing for Colorado Springs-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Colorado Springs-Ontario flights.
Search Deals
From Colorado Springs to Ontario
Search Deals
One-way flight from Colorado Springs to Ontario
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado Springs to Ontario 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 December 26, 2025.
Use the filters below to find and compare flights from Colorado Springs to Ontario that are best for you.

Fly from

Colorado Springs

Fly to

Ontario

Route

Depart

Return

Price

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Sat 2/21

7:55 am-12:07 pm

1 stop5h 12m

Ontario

Tue 2/24

6:00 am-11:15 am

1 stop4h 15m

$205

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Fri 2/6

12:03 pm-10:44 pm

2 stops11h 41m

Ontario

Mon 2/9

5:10 pm-10:23 pm

1 stop4h 13m

$244

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Tue 1/20

5:05 pm-8:58 pm

1 stop4h 53m

Ontario

Tue 1/27

1:24 pm-6:18 pm

1 stop3h 54m

$267

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Tue 2/3

5:05 pm-8:58 pm

1 stop4h 53m

Ontario

Wed 2/4

1:24 pm-9:06 pm

1 stop6h 42m

$267

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Tue 1/20

3:30 pm-8:58 pm

1 stop6h 28m

Ontario

Sat 1/24

5:05 am-10:57 am

1 stop4h 52m

$275

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Tue 3/10

8:45 am-5:41 pm

2 stops9h 56m

$139

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Sat 5/30

3:25 pm-8:17 pm

1 stop5h 52m

$168

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Sat 5/30

9:50 am-3:35 pm

2 stops6h 45m

$173

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Wed 1/7

12:00 pm-4:12 pm

1 stop5h 12m

$224

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Sun 1/11

9:27 am-12:47 pm

1 stop4h 20m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

Showing 1-10 of 12 results
1
2

Compare providers for flights from Colorado Springs to Ontario

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 Colorado Springs to Ontario in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Colorado Springs-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Colorado Springs-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Colorado Springs-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Colorado Springs-Ontario flights, Cheapflights users trust eDreams the most. eDreams 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 Colorado Springs-Ontario 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 Colorado Springs to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Colorado Springs with our price prediction graph.
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 Colorado Springs to Ontario

What is the cheapest month to book a flight from Colorado Springs to Ontario?

Currently, February is the cheapest month in which you can book a flight from Colorado Springs to Ontario (average of $38). Flying from Colorado Springs to Ontario in June is currently the most expensive (average of $97). 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.

What is the cheapest time of day to fly from COS to ONT?

Find hourly flight availability from Colorado Springs to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 26, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 13% on flights from Colorado Springs to Ontario by exploring options for tickets in the evening.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated December 26, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Colorado Springs to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,258 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,258 reviews
Southwest
8.0
Very good
4,258 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
8,016 reviews
Southwest
8.0
Very good
4,258 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
9,116 reviews
Southwest
8.0
Very good
4,258 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Colorado Springs to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Colorado Springs to Ontario?

    Airlines like Delta and United Airlines fly from Colorado Springs to Ontario in about 4h 53m. The time it takes to get you to your destination can typically vary by up to 19m. The distance between Colorado Springs and Ontario is about 787 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Colorado Springs to Ontario round-trip?

    Our cheapest airline available from Colorado Springs to Ontario is Delta. Our recent data shows that you can find tickets from as low as $177 on this airline. Additional options worth looking into are Southwest and United Airlines, starting at $212 and $286 round-trip. Users have found that Delta is 50% cheaper than the other options available to this destination.

  • Can I find deals for flights from Colorado Springs to Ontario that include hotel bookings?

    Yes. In addition to deals on Colorado Springs to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado Springs to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado Springs to Ontario.

  • Can I find deals for business class flights from Colorado Springs to Ontario?

    Yes. Cheapflights offers flight deals from Colorado Springs to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, February is the cheapest month in which you can book a flight from Colorado Springs to Ontario (average of $38). Flying from Colorado Springs to Ontario in June is currently the most expensive (average of $97). 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.

See more FAQs

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 for Colorado Springs to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Las Vegas flights
Denver to Los Angeles flights
Denver to San Diego flights
Denver to San Francisco flights
Denver to Ontario flights
Denver to Santa Ana flights
Denver to Palm Springs flights
Denver to San Jose flights
Denver to Burbank flights
Denver to Reno flights
Colorado Springs to Las Vegas flights
Denver to Sacramento flights
Denver to Santa Barbara flights
Denver to Fresno flights
Denver to Monterey flights
Denver to Oakland flights
Denver to Long Beach flights
Vail to Los Angeles flights
Denver to San Luis Obispo flights
Montrose to Santa Ana flights
Grand Junction to Los Angeles flights
Aspen to Los Angeles flights
Vail to Las Vegas flights
Colorado Springs to San Diego flights
Denver to Arcata flights
Vail to Santa Ana flights
Colorado Springs to Reno flights
Vail to San Diego flights
Grand Junction to Las Vegas flights
Montrose to Las Vegas flights
Durango to Los Angeles flights
Denver to Medford flights
Colorado Springs to San Francisco flights
Colorado Springs to Los Angeles flights
Aspen to San Francisco flights
Denver to Bakersfield flights
Colorado Springs to Santa Ana flights
Colorado Springs to Sacramento flights
Denver to Redding flights
Vail to San Francisco flights
Grand Junction to Ontario flights
Vail to Reno flights
Montrose to Ontario flights
Aspen to Ontario flights
Colorado Springs to Palm Springs flights
Durango to Las Vegas flights
Durango to San Diego flights
Grand Junction to Santa Ana flights
Colorado Springs to Oakland flights

Top 3 airlines flying from Colorado Springs to Ontario

Discover the top 3 airlines that operate flights from Colorado Springs to Ontario. 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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$177Average$287FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$212Average$386FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$286Average$467FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.