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Riverside

$63+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
May 1 — May 81
Fri 5/1
Fri 5/8
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 April 1, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/1. 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 4/2911:44 am
ONT
-
LAX
1 stop4h 31m
Frontier
Wed 5/66:30 am
LAX
-
ONT
1 stop17h 19m
Frontier
Deal found 4/1$128
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/287:44 pm
ONT
-
LAX
1 stop20h 31m
Multiple Airlines
Tue 5/512:02 pm
LAX
-
ONT
1 stop7h 30m
Multiple Airlines
Deal found 3/31$130
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/287:44 pm
ONT
-
LAX
1 stop20h 31m
Frontier
Tue 5/510:20 pm
LAX
-
ONT
2 stops17h 24m
Frontier
Deal found 3/31$142
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/199:09 pm
ONT
-
LAX
1 stop11h 09m
Frontier
Sat 4/256:15 am
LAX
-
ONT
1 stop17h 40m
Frontier
Deal found 3/30$161
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/272:05 pm
ONT
-
LAX
1 stop26h 10m
Frontier
Mon 5/48:58 pm
LAX
-
ONT
1 stop18h 46m
Frontier
Deal found 3/30$162
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/272:05 pm
ONT
-
LAX
1 stop26h 10m
Multiple Airlines
Tue 5/56:30 am
LAX
-
ONT
1 stop9h 14m
Multiple Airlines
Deal found 3/31$164
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/139:02 pm
ONT
-
LAX
1 stop19h 13m
Frontier
Mon 5/41:19 pm
LAX
-
ONT
1 stop6h 45m
Frontier
Deal found 3/30$166
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/139:02 pm
ONT
-
LAX
1 stop19h 13m
Multiple Airlines
Fri 4/178:30 am
LAX
-
ONT
1 stop11h 34m
Multiple Airlines
Deal found 3/30$167
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 4/2511:44 am
ONT
-
LAX
1 stop4h 31m
Multiple Airlines
Sat 5/211:21 am
LAX
-
ONT
1 stop7h 28m
Multiple Airlines
Deal found 3/28$168
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/139:02 pm
ONT
-
LAX
1 stop18h 04m
Multiple Airlines
Thu 4/165:25 pm
LAX
-
ONT
1 stop14h 59m
Multiple Airlines
Deal found 3/31$169

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 April 1, 2026.

Round-trip from

$130
(Kiwi.com)

One-way from

$63
(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 April 1, 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

Wed 4/29

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles Los Angeles

Wed 5/6

9:48 am-11:49 pm

2 stops14h 01m

$156

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 4/27

2:05 pm-4:15 pm

1 stop26h 10m

Los Angeles Los Angeles

Mon 5/4

8:58 pm-3:44 pm

1 stop18h 46m

$162

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 4/27

2:05 pm-4:15 pm

1 stop26h 10m

Los Angeles Los Angeles

Tue 5/5

6:30 am-3:44 pm

1 stop9h 14m

$164
Quickest round-trip

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 4/25

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles Los Angeles

Sat 5/2

11:21 am-6:49 pm

1 stop7h 28m

$168

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sun 4/12

10:35 pm-7:21 am

1 stop8h 46m

Los Angeles Los Angeles

Wed 4/15

11:12 am-6:49 pm

1 stop7h 37m

$172

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 5/2

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles Los Angeles

Sat 5/9

6:30 am-11:49 pm

1 stop17h 19m

$176

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sun 4/26

9:29 pm-4:22 pm

1 stop18h 53m

Los Angeles Los Angeles

Sun 5/3

8:58 pm-8:04 am

1 stop11h 06m

$181

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 4/25

11:44 am-4:15 pm

1 stop4h 31m

Los Angeles Los Angeles

Sat 5/2

6:15 am-11:55 pm

1 stop17h 40m

$183

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Fri 4/24

9:59 pm-4:15 pm

1 stop18h 16m

Los Angeles Los Angeles

Fri 5/1

8:30 am-7:25 pm

1 stop10h 55m

$190

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Tue 4/14

12:59 am-11:14 pm

1 stop22h 15m

Los Angeles Los Angeles

Fri 4/24

8:58 pm-10:44 am

1 stop13h 46m

$192

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 22 resultsSorted by cheapest first
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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 4h 31m. Frontier provides one of the quickest options available for as low as $176. 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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