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Riverside

$65+ Cheap flights from Ontario (ONT) to Riverside, CA

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 6/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Jun 17 — Jun 241
Wed 6/17
Wed 6/24
1 adult, Economy
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Cheap flight deals from Ontario to Riverside

Cheapest flights from Ontario to Riverside
Explore the most affordable flight options available from Ontario to Riverside. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 18, 2026.

This Kiwi.com deal was found by Cheapflights users on 5/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/101:33 pm
ONT
-
LAX
1 stop5h 47m
Frontier
Mon 6/1510:12 pm
LAX
-
ONT
1 stop10h 55m
Frontier
Deal found 5/14$160
This Kiwi.com deal was found by Cheapflights users on 5/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/158:36 pm
ONT
-
LAX
1 stop20h 31m
Frontier
Mon 6/2210:12 pm
LAX
-
ONT
1 stop16h 56m
Frontier
Deal found 5/17$180
This Kiwi.com deal was found by Cheapflights users on 5/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/101:33 pm
ONT
-
LAX
1 stop5h 47m
Frontier
Wed 6/1712:14 pm
LAX
-
ONT
1 stop7h 37m
Frontier
Deal found 5/13$192
This Kiwi.com deal was found by Cheapflights users on 5/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/58:39 pm
ONT
-
LAX
1 stop25h 15m
Frontier
Tue 8/41:53 pm
LAX
-
ONT
2 stops25h 14m
Frontier
Deal found 5/16$205
This Kiwi.com deal was found by Cheapflights users on 5/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/68:17 pm
ONT
-
LAX
1 stop18h 03m
Frontier
Mon 6/88:27 pm
LAX
-
ONT
1 stop23h 24m
Frontier
Deal found 5/14$207
This Kiwi.com deal was found by Cheapflights users on 5/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/54:04 pm
ONT
-
LAX
1 stop22h 14m
Frontier
Mon 6/88:27 pm
LAX
-
ONT
1 stop18h 41m
Frontier
Deal found 5/15$210
This Kiwi.com deal was found by Cheapflights users on 5/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/58:39 pm
ONT
-
LAX
1 stop25h 15m
Frontier
Mon 8/310:15 pm
LAX
-
ONT
1 stop16h 52m
Frontier
Deal found 5/16$211
This Kiwi.com deal was found by Cheapflights users on 5/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/243:40 pm
ONT
-
LAX
1 stop17h 44m
Frontier
Mon 7/277:07 pm
LAX
-
ONT
1 stop17h 36m
Frontier
Deal found 5/17$215
This Kiwi.com deal was found by Cheapflights users on 5/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/128:36 pm
ONT
-
LAX
1 stop20h 31m
Frontier
Mon 6/1510:12 pm
LAX
-
ONT
1 stop10h 55m
Frontier
Deal found 5/14$235
This Kiwi.com deal was found by Cheapflights users on 5/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/58:39 pm
ONT
-
LAX
1 stop25h 15m
Frontier
Wed 8/58:15 pm
LAX
-
ONT
1 stop18h 52m
Frontier
Deal found 5/16$247

Find flight deals from Ontario to Riverside

Keep the following information in mind while searching for Ontario to Riverside flight deals. Data was last updated May 18, 2026.

Round-trip from

$160
(Kiwi.com)

One-way from

$65
(Kiwi.com)
From Ontario to Riverside
Search Deals
One-way flight from Ontario to Riverside
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Riverside 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 May 18, 2026.
Use the filters below to find and compare flights from Ontario to Riverside that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 6/15

8:36 pm-5:07 pm

1 stop20h 31m

Los Angeles

Mon 6/22

10:12 pm-3:08 pm

1 stop16h 56m

$180
Quickest round-trip

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Wed 6/10

1:33 pm-7:20 pm

1 stop5h 47m

Los Angeles

Wed 6/17

12:14 pm-7:51 pm

1 stop7h 37m

$192

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sun 7/5

8:39 pm-9:54 pm

1 stop25h 15m

Los Angeles

Tue 8/4

1:53 pm-3:07 pm

2 stops25h 14m

$205

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 6/6

8:17 pm-2:20 pm

1 stop18h 03m

Los Angeles

Mon 6/8

8:27 pm-7:51 pm

1 stop23h 24m

$207

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Fri 6/5

4:04 pm-2:18 pm

1 stop22h 14m

Los Angeles

Mon 6/8

8:27 pm-3:08 pm

1 stop18h 41m

$210

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Fri 7/24

3:40 pm-9:24 am

1 stop17h 44m

Los Angeles

Mon 7/27

7:07 pm-12:43 pm

1 stop17h 36m

$215

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Wed 6/10

3:34 pm-1:05 pm

2 stops21h 31m

Los Angeles

Mon 6/15

10:12 pm-9:07 am

1 stop10h 55m

$217

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sun 7/5

8:39 pm-9:54 pm

1 stop25h 15m

Los Angeles

Thu 8/6

12:14 pm-7:53 pm

1 stop7h 39m

$270

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Thu 7/16

11:43 am-7:20 pm

1 stop7h 37m

Los Angeles

Sun 7/19

10:15 pm-7:53 pm

1 stop21h 38m

$285

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 6/1

3:30 pm-4:59 pm

2 stops25h 29m

Los Angeles

Thu 6/4

5:54 pm-11:06 am

1 stop17h 12m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/16

Showing 1-10 of 19 resultsSorted by cheapest first
1
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Best time to book a flight from Ontario to Riverside

Have a flexible travel schedule? Discover the best time to fly to Riverside 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 Riverside
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Riverside. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Riverside?

    If you book a flight to Riverside from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 0 flights from Ontario to Riverside per day from 0 different airlines.

  • How long is the flight from Ontario to Riverside?

    A quick flight from Ontario to Riverside can take about 20h 31m. Frontier provides one of the quickest options available for as low as $180. Ontario and Riverside are separated by a distance of 47 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Riverside by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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