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$109+ 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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$218
(Delta)

One-way from

$109
(Delta)

Popular in

January

Cheapest in

June

Average price

$296
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. 17% potential increase in price ($92 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Delta deal was found by Cheapflights users on 6/11. 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.
Mon 8/45:55 pmCOS - ONT
1 stop6h 47mDelta
Mon 8/119:50 amONT - COS
1 stop6h 25mDelta
Deal found 6/11$218
This American Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/206:02 amCOS - ONT
1 stop8h 37mAmerican Airlines
Sun 8/2412:22 pmONT - COS
2 stops10h 22mAmerican Airlines
Deal found 6/10$250
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/106:35 pmCOS - ONT
1 stop6h 20mSouthwest
Thu 7/175:25 pmONT - COS
1 stop3h 55mSouthwest
Deal found 6/10$273
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 7/235:30 amCOS - ONT
2 stops7h 44mUnited Airlines
Sun 7/276:28 pmONT - COS
1 stop4h 24mUnited Airlines
Deal found 6/10$278

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 June 12, 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 8/4

5:55 pm-11:42 pm

1 stop6h 47m

Ontario

Mon 8/11

9:50 am-5:15 pm

1 stop6h 25m

$218

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Wed 8/20

6:02 am-1:39 pm

1 stop8h 37m

Ontario

Sun 8/24

12:22 pm-11:44 pm

2 stops10h 22m

$250

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Thu 7/10

6:35 pm-11:55 pm

1 stop6h 20m

Ontario

Thu 7/17

5:25 pm-10:20 pm

1 stop3h 55m

$273

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Wed 7/23

5:30 am-12:14 pm

2 stops7h 44m

Ontario

Sun 7/27

6:28 pm-11:52 pm

1 stop4h 24m

$278

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Thu 11/6

5:55 pm-11:46 pm

1 stop6h 51m

$109

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Thu 11/6

6:00 am-12:25 pm

2 stops7h 25m

$114

Colorado SpringsOntario

COS - ONT

COSONT

Colorado Springs

Sat 7/26

5:20 pm-8:54 pm

1 stop4h 34m

$172

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 June 12, 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 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
4,287 reviews

Overall

8.0

Entertainment

7.6

Food

7.1

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Overall

8.0

Entertainment

7.6

Food

7.1

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Overall

8.0

Entertainment

7.6

Food

7.1

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Overall

8.0

Entertainment

7.6

Food

7.1

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews

Overall

8.0

Entertainment

7.6

Food

7.1

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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.

  • 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 $218 on this airline. Additional options worth looking into are American Airlines and Southwest, starting at $250 and $273 round-trip. Users have found that Delta is 49% cheaper than the other options available to this destination.

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

    $109 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from $114 and $172, 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.

See more FAQs

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Alternative routes for Colorado Springs to Ontario

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Top 2 airlines flying from Colorado Springs to Ontario

Discover the top 2 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$270Average$403FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$296Average$467FlexibilityNo cancel feeOn-time69%

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