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Riverside

$74+ 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap flight deals from Ontario to Riverside

Keep the following information in mind while searching for Ontario to Riverside flight deals. Data was last updated August 14, 2025.

Round-trip from

$145
(Kiwi.com)

One-way from

$74
(Kiwi.com)
From Ontario to Riverside
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One-way flight from Ontario to Riverside
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Find 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 August 14, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Sat 9/61:37 pmONT - LAX
1 stop5h 18mMultiple Airlines
Mon 9/89:36 amLAX - ONT
1 stop11h 20mMultiple Airlines
Deal found 8/13$145
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Mon 10/610:28 pmONT - LAX
1 stop20h 11mMultiple Airlines
Sat 10/189:26 amLAX - ONT
1 stop11h 16mMultiple Airlines
Deal found 8/13$154
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/49:16 amONT - LAX
1 stop4h 17mMultiple Airlines
Mon 9/83:38 pmLAX - ONT
1 stop5h 18mMultiple Airlines
Deal found 8/12$157
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Mon 9/292:45 pmONT - LAX
1 stop5h 07mMultiple Airlines
Fri 10/38:55 pmLAX - ONT
1 stop15h 48mMultiple Airlines
Deal found 8/13$160
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/178:00 amONT - LAX
1 stop5h 33mMultiple Airlines
Wed 9/177:50 pmLAX - ONT
1 stop12h 36mMultiple Airlines
Deal found 8/13$162
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/98:00 amONT - LAX
1 stop10h 55mMultiple Airlines
Tue 9/169:36 amLAX - ONT
1 stop12h 20mMultiple Airlines
Deal found 8/12$175
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Sun 9/710:28 pmONT - LAX
1 stop12h 28mMultiple Airlines
Fri 9/128:55 pmLAX - ONT
1 stop15h 48mMultiple Airlines
Deal found 8/14$176
This Kiwi.com deal was found by Cheapflights users on 8/13. 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.
Fri 9/1210:28 pmONT - LAX
1 stop15h 05mMultiple Airlines
Mon 9/153:32 pmLAX - ONT
1 stop5h 24mMultiple Airlines
Deal found 8/13$178
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/257:19 pmONT - LAX
1 stop4h 39mMultiple Airlines
Thu 8/287:58 pmLAX - ONT
1 stop11h 35mMultiple Airlines
Deal found 8/12$202
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/79:41 pmONT - LAX
1 stop11h 53mMultiple Airlines
Thu 11/136:00 amLAX - ONT
1 stop5h 47mMultiple Airlines
Deal found 8/12$203

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 August 14, 2025.
Use the filters below to find and compare flights from Ontario to Riverside that are best for you.

Fly from

Ontario

Fly to

Riverside

Route

Depart

Return

Price

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 9/6

1:37 pm-6:55 pm

1 stop5h 18m

Los Angeles

Mon 9/8

9:36 am-8:56 pm

1 stop11h 20m

$145

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 10/6

10:28 pm-6:39 pm

1 stop20h 11m

Los Angeles

Sat 10/18

9:26 am-8:42 pm

1 stop11h 16m

$154

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Thu 9/4

9:16 am-1:33 pm

1 stop4h 17m

Los Angeles

Mon 9/8

3:38 pm-8:56 pm

1 stop5h 18m

$157

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 9/29

2:45 pm-7:52 pm

1 stop5h 07m

Los Angeles

Fri 10/3

8:55 pm-12:43 pm

1 stop15h 48m

$160

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Wed 9/17

8:00 am-1:33 pm

1 stop5h 33m

Los Angeles

Wed 9/17

7:50 pm-8:26 am

1 stop12h 36m

$162

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Tue 9/9

8:00 am-6:55 pm

1 stop10h 55m

Los Angeles

Tue 9/16

9:36 am-9:56 pm

1 stop12h 20m

$175

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sun 9/7

10:28 pm-10:56 am

1 stop12h 28m

Los Angeles

Fri 9/12

8:55 pm-12:43 pm

1 stop15h 48m

$176

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Fri 9/12

10:28 pm-1:33 pm

1 stop15h 05m

Los Angeles

Mon 9/15

3:32 pm-8:56 pm

1 stop5h 24m

$178

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 8/25

7:19 pm-11:58 pm

1 stop4h 39m

Los Angeles

Thu 8/28

7:58 pm-7:33 am

1 stop11h 35m

$202

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Fri 11/7

9:41 pm-9:34 am

1 stop11h 53m

Los Angeles

Thu 11/13

6:00 am-11:47 am

1 stop5h 47m

$203

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 15 results
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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

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

Currently, January is the cheapest month in which you can book a flight from Ontario to Riverside (average of $246). Flying from Ontario to Riverside in March is currently the most expensive (average of $326). 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 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.

  • 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.

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

    Currently, January is the cheapest month in which you can book a flight from Ontario to Riverside (average of $246). Flying from Ontario to Riverside in March is currently the most expensive (average of $326). 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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