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$85+ 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ONT
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$159
(American Airlines)

One-way from

$85
(American Airlines)

Popular in

January

Cheapest in

October

Average price

$301
From Colorado Springs to Ontario
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One-way flight from Colorado Springs to Ontario
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Highest demand for flights based on searches. 22% potential increase in price ($118 potential increase over avg. RT price).
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Cheapest flight prices on average. 10% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. 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.
Mon 12/153:33 pmCOS - ONT
1 stop6h 09mUnited Airlines
Wed 12/175:05 amONT - COS
1 stop7h 03mUnited Airlines
Deal found 9/10$185
This Delta deal was found by Cheapflights users on 9/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/305:55 pmCOS - ONT
1 stop6h 47mDelta
Tue 10/74:35 pmONT - COS
1 stop4h 35mDelta
Deal found 9/11$217
This Southwest deal was found by Cheapflights users on 9/11. 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 10/176:15 pmCOS - ONT
1 stop6h 25mSouthwest
Mon 10/205:55 pmONT - COS
1 stop5h 40mSouthwest
Deal found 9/11$245
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Thu 10/27:00 amCOS - ONT
1 stop6h 51mUnited Airlines
Thu 10/96:27 pmONT - COS
1 stop4h 25mUnited Airlines
Deal found 9/11$255
This Southwest deal was found by Cheapflights users on 9/11. 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.
Thu 10/166:15 pmCOS - ONT
1 stop6h 25mSouthwest
Sat 10/185:25 amONT - COS
1 stop3h 50mSouthwest
Deal found 9/11$273
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 10/231:54 pmCOS - ONT
1 stop4h 29mUnited Airlines
Sun 10/261:29 pmONT - COS
1 stop5h 36mUnited Airlines
Deal found 9/10$287
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/312:54 pmCOS - ONT
1 stop5h 29mUnited Airlines
Mon 10/66:27 pmONT - COS
1 stop4h 25mUnited Airlines
Deal found 9/11$298
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/312:54 pmCOS - ONT
1 stop5h 29mUnited Airlines
Tue 10/71:53 pmONT - COS
2 stops7h 01mUnited Airlines
Deal found 9/11$303
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/57:30 amCOS - ONT
1 stop6h 21mUnited Airlines
Thu 10/96:27 pmONT - COS
1 stop4h 25mUnited Airlines
Deal found 9/11$311

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 September 11, 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

Mon 12/15

3:33 pm-8:42 pm

1 stop6h 09m

Ontario

Wed 12/17

5:05 am-1:08 pm

1 stop7h 03m

$185

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Tue 9/30

5:55 pm-11:42 pm

1 stop6h 47m

Ontario

Tue 10/7

4:35 pm-10:10 pm

1 stop4h 35m

$217

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Wed 10/1

5:55 pm-11:42 pm

1 stop6h 47m

Ontario

Wed 10/8

9:50 am-5:09 pm

1 stop6h 19m

$217

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Mon 10/6

5:49 pm-11:39 pm

1 stop6h 50m

Ontario

Tue 10/7

4:35 pm-10:10 pm

1 stop4h 35m

$217

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Wed 10/1

5:55 pm-11:42 pm

1 stop6h 47m

Ontario

Tue 10/7

4:35 pm-10:10 pm

1 stop4h 35m

$217

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Fri 10/3

12:54 pm-5:23 pm

1 stop5h 29m

Ontario

Tue 10/7

1:15 pm-7:40 pm

1 stop5h 25m

$255

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Thu 10/2

7:00 am-12:51 pm

1 stop6h 51m

Ontario

Fri 10/10

6:27 pm-11:52 pm

1 stop4h 25m

$255

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Thu 10/2

7:00 am-12:51 pm

1 stop6h 51m

Ontario

Tue 10/7

1:15 pm-8:15 pm

1 stop6h 00m

$255

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Fri 10/3

12:54 pm-5:23 pm

1 stop5h 29m

Ontario

Wed 10/8

6:27 pm-11:52 pm

1 stop4h 25m

$255

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Fri 10/3

12:54 pm-5:23 pm

1 stop5h 29m

Ontario

Sat 10/4

1:15 pm-6:49 pm

1 stop4h 34m

$255

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 22 results
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2
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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, August is the cheapest month in which you can book a flight from Colorado Springs to Ontario (average of $246). Flying from Colorado Springs to Ontario in March is currently the most expensive (average of $328). 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 September 11, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 14% 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 September 11, 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
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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
8.0
Very good
7,960 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

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 United Airlines and Delta fly from Colorado Springs to Ontario in about 6h 09m. The time it takes to get you to your destination can typically vary by up to 38m. 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 56% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Colorado Springs to Ontario one-way?

    $85 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $93 and $109, respectively.

  • 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, August is the cheapest month in which you can book a flight from Colorado Springs to Ontario (average of $246). Flying from Colorado Springs to Ontario in March is currently the most expensive (average of $328). 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.

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Alternative routes for Colorado Springs to Ontario

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$177Average$288FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$212Average$386FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$286Average$397FlexibilityNo cancel feeOn-time69%

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