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$216+ Cheap flights from Aspen to Ontario (ASE - 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 3/30. Fares are subject to change and may not be available on all flights or dates of travel.
ASE — ONT
Mar 22 — Mar 291
Sun 3/22
Sun 3/29
1 adult, Economy
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Cheap flight deals from Aspen to Ontario

Cheapest flights from Aspen to Ontario
Explore the most affordable flight options available from Aspen to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2026.

This United Airlines deal was found by Cheapflights users on 2/17. 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.
Sat 3/75:16 pm
ASE
-
ONT
1 stop4h 34m
United Airlines
Mon 3/95:15 am
ONT
-
ASE
1 stop5h 05m
United Airlines
Deal found 2/17$339
This United Airlines deal was found by Cheapflights users on 2/17. 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 2/274:01 pm
ASE
-
ONT
1 stop7h 56m
United Airlines
Tue 3/31:45 pm
ONT
-
ASE
1 stop6h 49m
United Airlines
Deal found 2/17$374
This American Airlines deal was found by Cheapflights users on 2/20. 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 3/2411:33 am
ASE
-
ONT
1 stop8h 36m
American Airlines
Thu 3/267:00 am
ONT
-
ASE
1 stop8h 06m
American Airlines
Deal found 2/20$403
This United Airlines deal was found by Cheapflights users on 2/17. 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 6/42:22 pm
ASE
-
ONT
1 stop7h 20m
United Airlines
Wed 6/101:50 pm
ONT
-
ASE
1 stop5h 05m
United Airlines
Deal found 2/17$420
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Sat 3/79:12 am
ASE
-
ONT
1 stop4h 36m
United Airlines
Sun 3/86:15 am
ONT
-
ASE
1 stop5h 53m
United Airlines
Deal found 2/17$424
This United Airlines deal was found by Cheapflights users on 2/16. 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 4/162:27 pm
ASE
-
ONT
1 stop7h 09m
United Airlines
Sun 4/195:10 am
ONT
-
ASE
1 stop4h 59m
United Airlines
Deal found 2/16$473

Find flight deals from Aspen to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Aspen (ASE) 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 February 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$339
(United Airlines)

One-way from

$216
(American Airlines)

Popular in

December

Cheapest in

November

Average price

$432
Provider with most accurate pricing for Aspen Pitkin County-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Aspen Pitkin County-Ontario flights.
Search Deals
From Aspen Pitkin County to Ontario
Search Deals
One-way flight from Aspen Pitkin County to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($33 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Aspen 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 February 20, 2026.
Use the filters below to find and compare flights from Aspen to Ontario that are best for you.

Fly from

Aspen

Fly to

Ontario

Route

Depart

Return

Price

AspenOntario

ASE - ONT

ASEONT

Aspen Pitkin County

Sat 3/7

5:16 pm-8:50 pm

1 stop4h 34m

Ontario

Mon 3/9

5:15 am-11:20 am

1 stop5h 05m

$339

AspenOntario

ASE - ONT

ASEONT

Aspen Pitkin County

Wed 7/15

2:22 pm-8:17 pm

1 stop6h 55m

Ontario

Mon 7/20

5:00 am-10:36 am

1 stop4h 36m

$339

AspenOntario

ASE - ONT

ASEONT

Aspen Pitkin County

Sat 3/7

12:22 pm-10:57 pm

2 stops11h 35m

Ontario

Sun 3/8

5:15 am-11:20 am

1 stop5h 05m

$344

AspenOntario

ASE - ONT

ASEONT

Aspen Pitkin County

Tue 3/24

11:33 am-7:09 pm

1 stop8h 36m

Ontario

Thu 3/26

7:00 am-4:06 pm

1 stop8h 06m

$403

AspenOntario

ASE - ONT

ASEONT

Aspen Pitkin County

Thu 6/4

2:22 pm-8:42 pm

1 stop7h 20m

Ontario

Wed 6/10

1:50 pm-7:55 pm

1 stop5h 05m

$420

AspenOntario

ASE - ONT

ASEONT

Aspen Pitkin County

Thu 4/16

2:27 pm-8:36 pm

1 stop7h 09m

Ontario

Sun 4/19

5:10 am-11:09 am

1 stop4h 59m

$473

AspenOntario

ASE - ONT

ASEONT

Aspen Pitkin County

Sun 6/21

7:30 am-12:47 pm

1 stop6h 17m

Ontario

Wed 7/8

5:00 am-10:36 am

1 stop4h 36m

$578

AspenOntario

ASE - ONT

ASEONT

Aspen Pitkin County

Mon 3/30

10:24 am-4:22 pm

1 stop6h 58m

$216

AspenOntario

ASE - ONT

ASEONT

Aspen Pitkin County

Tue 3/31

1:40 pm-6:02 pm

1 stop5h 22m

$251

AspenOntario

ASE - ONT

ASEONT

Aspen Pitkin County

Tue 3/24

3:29 pm-8:50 pm

1 stop6h 21m

$251

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/17

Showing 1-10 of 16 results
1
2
  • Most accurate provider: When it comes to deals on Aspen-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Aspen-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Aspen-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Aspen-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub 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 Aspen-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 Aspen to Ontario

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

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

Currently, July is the cheapest month in which you can book a flight from Aspen to Ontario (average of $83). Flying from Aspen to Ontario in May is currently the most expensive (average of $183). 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.

Related info for your journey

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

    A quick flight from Aspen to Ontario can take about 4h 34m. United Airlines provides one of the quickest options available for as low as $339. Aspen and Ontario are separated by a distance of 692 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

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

    Currently, July is the cheapest month in which you can book a flight from Aspen to Ontario (average of $83). Flying from Aspen to Ontario in May is currently the most expensive (average of $183). 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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