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Aspen

$241+ Cheap flights from Ontario to Aspen (ONT - ASE)

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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ASE
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Find flight deals from Ontario to Aspen

Cheapest flights from Ontario to Aspen
Explore the most affordable flight options available from Ontario to Aspen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2025.

This United Airlines deal was found by Cheapflights users on 11/11. 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 11/215:05 amONT - ASE
1 stop4h 31mUnited Airlines
Tue 12/25:12 pmASE - ONT
1 stop4h 30mUnited Airlines
Deal found 11/11$374
This American Airlines deal was found by Cheapflights users on 11/12. 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 11/1910:47 amONT - ASE
1 stop7h 44mAmerican Airlines
Sun 11/237:34 amASE - ONT
1 stop7h 30mAmerican Airlines
Deal found 11/12$389
This American Airlines deal was found by Cheapflights users on 11/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:20 amONT - ASE
1 stop4h 29mAmerican Airlines
Mon 1/510:35 amASE - ONT
1 stop6h 32mAmerican Airlines
Deal found 11/11$419
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Mon 12/295:05 amONT - ASE
1 stop4h 24mUnited Airlines
Mon 1/55:00 pmASE - ONT
1 stop5h 08mUnited Airlines
Deal found 11/11$424
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/46:41 pmONT - ASE
2 stops13h 20mUnited Airlines
Mon 12/88:30 amASE - ONT
1 stop5h 02mUnited Airlines
Deal found 11/12$429
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Mon 12/295:05 amONT - ASE
1 stop4h 24mUnited Airlines
Tue 12/305:00 pmASE - ONT
1 stop5h 07mUnited Airlines
Deal found 11/11$481
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Tue 12/166:41 pmONT - ASE
2 stops13h 20mUnited Airlines
Sat 12/275:00 pmASE - ONT
1 stop5h 07mUnited Airlines
Deal found 11/11$484
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Tue 11/255:05 amONT - ASE
1 stop4h 31mUnited Airlines
Tue 12/25:12 pmASE - ONT
1 stop4h 30mUnited Airlines
Deal found 11/11$498
This American Airlines deal was found by Cheapflights users on 11/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:20 amONT - ASE
1 stop4h 29mAmerican Airlines
Thu 1/17:07 amASE - ONT
1 stop7h 45mAmerican Airlines
Deal found 11/11$500
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/151:34 pmONT - ASE
1 stop6h 44mUnited Airlines
Fri 12/195:00 pmASE - ONT
1 stop5h 07mUnited Airlines
Deal found 11/12$515
This United Airlines deal was found by Cheapflights users on 11/12. 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 12/185:05 amONT - ASE
1 stop4h 59mUnited Airlines
Sun 12/217:35 amASE - ONT
1 stop6h 03mUnited Airlines
Deal found 11/12$530

Cheap flight deals from Ontario to Aspen

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Aspen (ASE). 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 13, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$374
(United Airlines)

One-way from

$241
(United Airlines)

Popular in

February

Cheapest in

September

Average price

$423
Provider with most accurate pricing for Ontario-Aspen Pitkin County flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Aspen Pitkin County flights.
Search Deals
From Ontario to Aspen Pitkin County
Search Deals
One-way flight from Ontario to Aspen Pitkin County
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 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 Ontario to Aspen 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 13, 2025.
Use the filters below to find and compare flights from Ontario to Aspen that are best for you.

Fly from

Ontario

Fly to

Aspen

Route

Depart

Return

Price

OntarioAspen

ONT - ASE

ONTASE

Ontario

Sat 1/24

6:00 am-12:17 pm

1 stop5h 17m

Aspen Pitkin County

Wed 1/28

3:25 pm-8:58 pm

1 stop6h 33m

$374

OntarioAspen

ONT - ASE

ONTASE

Ontario

Fri 11/21

5:05 am-10:36 am

1 stop4h 31m

Aspen Pitkin County

Tue 12/2

5:12 pm-8:42 pm

1 stop4h 30m

$374

OntarioAspen

ONT - ASE

ONTASE

Ontario

Sat 11/22

5:05 am-10:36 am

1 stop4h 31m

Aspen Pitkin County

Tue 12/2

8:30 am-12:32 pm

1 stop5h 02m

$374

OntarioAspen

ONT - ASE

ONTASE

Ontario

Tue 12/23

5:05 am-10:29 am

1 stop4h 24m

Aspen Pitkin County

Fri 12/26

5:00 pm-9:07 pm

1 stop5h 07m

$374

OntarioAspen

ONT - ASE

ONTASE

Ontario

Thu 12/4

1:34 pm-9:01 am

1 stop18h 27m

Aspen Pitkin County

Mon 12/8

8:30 am-12:32 pm

1 stop5h 02m

$424

OntarioAspen

ONT - ASE

ONTASE

Ontario

Tue 12/30

5:05 am-11:04 am

1 stop4h 59m

Aspen Pitkin County

Mon 1/5

5:00 pm-9:08 pm

1 stop5h 08m

$424

OntarioAspen

ONT - ASE

ONTASE

Ontario

Wed 1/14

5:05 am-11:04 am

1 stop4h 59m

Aspen Pitkin County

Sun 1/18

5:02 pm-8:58 pm

1 stop4h 56m

$424

OntarioAspen

ONT - ASE

ONTASE

Ontario

Mon 12/29

5:05 am-10:29 am

1 stop4h 24m

Aspen Pitkin County

Tue 12/30

5:00 pm-9:07 pm

1 stop5h 07m

$481

OntarioAspen

ONT - ASE

ONTASE

Ontario

Tue 12/16

6:41 pm-9:01 am

2 stops13h 20m

Aspen Pitkin County

Sat 12/27

5:00 pm-9:07 pm

1 stop5h 07m

$484

OntarioAspen

ONT - ASE

ONTASE

Ontario

Thu 4/16

5:10 am-10:51 am

1 stop4h 41m

$241

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 20 results
1
2

Compare providers for flights from Ontario to Aspen

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 Ontario to Aspen in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

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

Have a flexible travel schedule? Discover the best time to fly to Aspen from Ontario 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 Ontario to Aspen

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

Currently, August is the cheapest month in which you can book a flight from Ontario to Aspen (average of $76). Flying from Ontario to Aspen in March is currently the most expensive (average of $218). 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.

Reviews of airlines servicing Aspen

Get insights into the airlines that provide service to Aspen. 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 Aspen. Reviews last updated November 13, 2025.
See what other customers who have flown with United Airlines from Ontario to Aspen have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,015 reviews

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.
United Airlines
7.4
Good
9,015 reviews
United Airlines
7.4
Good
9,015 reviews

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Julia,Sep 2025

BUF - DEN

The staff were amazing, from check in to boarding and on the flight. The range of entertainment options were really good as well.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Aspen. 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 Ontario to Aspen?

    Airlines like United Airlines fly from Ontario to Aspen in about 5h 17m. The time it takes to get you to your destination can typically vary by up to . The distance from Ontario to Aspen is about 692 mi.

  • What is the cheapest airline to fly from Ontario to Aspen round-trip?

    Cheapflights users have booked flights from Ontario to Aspen round-trip from $263.

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

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

  • How can I find direct flights from Ontario to Aspen?

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

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

    Yes. Cheapflights offers flight deals from Ontario to Aspen 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 Ontario to Aspen?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Aspen (average of $76). Flying from Ontario to Aspen in March is currently the most expensive (average of $218). 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

Traveling to a place near Aspen?

Book flights to Aspen if you plan to visit one of these locations
Snowmass Village
Buena Vista
Snowmass

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Top airline flying from Ontario to Aspen

Discover the top airline that operate flights from Ontario to Aspen. 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 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$263Average$448FlexibilityNo cancel feeOn-time69%

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