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$99+ 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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ONT
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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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 November 3, 2025.

This Delta deal was found by Cheapflights users on 11/1. 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.
Mon 11/246:02 pmCOS - ONT
1 stop6h 50mDelta
Wed 12/34:49 pmONT - COS
1 stop4h 36mDelta
Deal found 11/1$197
This Delta deal was found by Cheapflights users on 11/3. 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.
Wed 12/108:10 amCOS - ONT
2 stops9h 57mDelta
Wed 12/174:49 pmONT - COS
1 stop4h 36mDelta
Deal found 11/3$202
This Delta deal was found by Cheapflights users on 11/3. 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.
Mon 12/86:00 pmCOS - ONT
1 stop6h 58mDelta
Tue 12/164:49 pmONT - COS
1 stop4h 36mDelta
Deal found 11/3$234
This United Airlines deal was found by Cheapflights users on 11/1. 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 12/1710:24 amCOS - ONT
2 stops8h 11mUnited Airlines
Wed 12/315:05 amONT - COS
1 stop7h 06mUnited Airlines
Deal found 11/1$245
This Delta deal was found by Cheapflights users on 11/1. 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.
Wed 12/178:10 amCOS - ONT
1 stop5h 24mDelta
Wed 12/311:15 pmONT - COS
1 stop5h 27mDelta
Deal found 11/1$258
This Southwest deal was found by Cheapflights users on 11/1. 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 12/172:25 pmCOS - ONT
1 stop4h 50mSouthwest
Wed 12/318:30 amONT - COS
1 stop4h 20mSouthwest
Deal found 11/1$289
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Tue 12/23:33 pmCOS - ONT
1 stop6h 09mUnited Airlines
Tue 12/95:05 amONT - COS
1 stop5h 13mUnited Airlines
Deal found 11/2$292
This Delta deal was found by Cheapflights users on 11/2. 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 12/26:00 pmCOS - ONT
1 stop6h 58mDelta
Tue 12/96:40 amONT - COS
2 stops9h 39mDelta
Deal found 11/2$297
This Southwest deal was found by Cheapflights users on 11/3. 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 12/105:15 amCOS - ONT
2 stops15h 00mSouthwest
Wed 12/178:40 amONT - COS
2 stops6h 35mSouthwest
Deal found 11/3$305
This United Airlines deal was found by Cheapflights users on 11/3. 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 12/57:00 amCOS - ONT
1 stop6h 32mUnited Airlines
Mon 12/85:05 amONT - COS
1 stop5h 13mUnited Airlines
Deal found 11/3$329
This American Airlines deal was found by Cheapflights users on 11/2. 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.
Tue 12/25:45 amCOS - ONT
2 stops11h 16mAmerican Airlines
Tue 12/96:17 amONT - COS
2 stops8h 28mAmerican Airlines
Deal found 11/2$333

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 November 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$197
(Delta)

One-way from

$99
(American Airlines)

Popular in

January

Cheapest in

October

Average price

$434
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. 22% potential increase in price ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 3, 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

Wed 12/10

8:10 am-5:07 pm

2 stops9h 57m

Ontario

Wed 12/17

4:49 pm-10:25 pm

1 stop4h 36m

$202

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Mon 12/8

6:00 pm-11:58 pm

1 stop6h 58m

Ontario

Tue 12/16

4:49 pm-10:25 pm

1 stop4h 36m

$234

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Wed 2/11

5:05 pm-8:58 pm

1 stop4h 53m

Ontario

Sun 2/15

5:00 am-10:52 am

1 stop4h 52m

$267

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Fri 12/5

7:00 am-12:32 pm

1 stop6h 32m

Ontario

Mon 12/8

5:05 am-11:18 am

1 stop5h 13m

$329

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Tue 12/2

5:45 am-4:01 pm

2 stops11h 16m

Ontario

Tue 12/9

6:17 am-3:45 pm

2 stops8h 28m

$333

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Thu 12/4

3:33 pm-8:42 pm

1 stop6h 09m

Ontario

Mon 12/8

5:05 am-11:18 am

1 stop5h 13m

$341

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Wed 1/28

3:30 pm-8:58 pm

1 stop6h 28m

Ontario

Sun 2/1

5:05 am-10:57 am

1 stop4h 52m

$362

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Tue 12/2

3:33 pm-8:42 pm

1 stop6h 09m

Ontario

Tue 12/9

6:00 am-2:29 pm

2 stops7h 29m

$367

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Tue 3/31

5:08 pm-11:43 pm

1 stop7h 35m

Ontario

Sat 4/4

1:32 pm-11:25 pm

2 stops8h 53m

$374

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Mon 11/24

8:30 am-12:33 pm

1 stop5h 03m

$230

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 15 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 November.
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, January 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 November 3, 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 November 3, 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
4,238 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

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
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

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
8,001 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

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
8,997 reviews
Southwest
8.0
Very good
4,238 reviews

Crew

8.6

Entertainment

7.5

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

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, United Airlines, and American 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 6h 23m. 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 55% 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, January 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.

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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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$177Average$288FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$212Average$388FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$286Average$426FlexibilityNo cancel feeOn-time69%

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