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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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Jul 9 — Jul 161
Thu 7/9
Thu 7/16
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 June 9, 2026.

This Kiwi.com deal was found by Cheapflights users on 6/6. 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 9/26:00 am
ONT
-
LAX
1 stop18h 11m
Frontier
Wed 9/1611:47 am
LAX
-
ONT
1 stop4h 23m
Frontier
Deal found 6/6$134
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 6/301:33 pm
ONT
-
LAX
1 stop5h 27m
Frontier
Wed 7/112:14 pm
LAX
-
ONT
1 stop7h 37m
Frontier
Deal found 6/8$187
This Kiwi.com deal was found by Cheapflights users on 6/8. 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 7/11:33 pm
ONT
-
LAX
1 stop5h 27m
Frontier
Tue 7/76:30 am
LAX
-
ONT
1 stop8h 44m
Frontier
Deal found 6/8$219
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 7/308:58 am
ONT
-
LAX
1 stop13h 01m
Frontier
Sun 8/29:09 pm
LAX
-
ONT
1 stop10h 54m
Frontier
Deal found 6/5$251
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 7/98:58 am
ONT
-
LAX
1 stop12h 50m
Frontier
Mon 7/137:07 pm
LAX
-
ONT
1 stop17h 46m
Frontier
Deal found 6/5$255
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/243:34 pm
ONT
-
LAX
2 stops17h 24m
Frontier
Sat 8/298:15 pm
LAX
-
ONT
1 stop23h 33m
Frontier
Deal found 6/4$258
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 7/33:34 pm
ONT
-
LAX
1 stop17h 51m
Frontier
Fri 7/106:30 am
LAX
-
ONT
1 stop9h 24m
Frontier
Deal found 6/5$264
This Kiwi.com deal was found by Cheapflights users on 6/6. 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 7/23:34 pm
ONT
-
LAX
1 stop23h 33m
Frontier
Wed 7/157:07 pm
LAX
-
ONT
1 stop16h 00m
Frontier
Deal found 6/6$278

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 June 9, 2026.

Round-trip from

$134
(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 June 9, 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 8/24

3:34 pm-9:25 am

1 stop17h 51m

Los Angeles

Sat 8/29

8:15 pm-7:48 pm

1 stop23h 33m

$187

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Wed 7/1

1:33 pm-7:00 pm

1 stop5h 27m

Los Angeles

Tue 7/7

6:30 am-3:14 pm

1 stop8h 44m

$219

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Fri 7/3

3:34 pm-1:05 pm

2 stops21h 31m

Los Angeles

Fri 7/10

7:07 pm-11:07 am

1 stop16h 00m

$265

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Thu 7/2

3:34 pm-3:07 pm

1 stop23h 33m

Los Angeles

Wed 7/15

7:07 pm-11:07 am

1 stop16h 00m

$278

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Tue 6/30

1:33 pm-7:00 pm

1 stop5h 27m

Los Angeles

Wed 7/1

2:00 pm-3:08 pm

2 stops25h 08m

$286

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Mon 7/6

3:40 pm-1:01 pm

2 stops45h 21m

Los Angeles

Mon 7/13

6:11 pm-12:53 pm

1 stop18h 42m

$296
Quickest round-trip

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 10/24

6:00 am-1:59 pm

1 stop7h 59m

Los Angeles

Sun 10/25

11:47 am-4:10 pm

1 stop4h 23m

$308
Cheapest one-way

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Tue 9/1

3:34 pm-9:24 pm

2 stops29h 50m

$90
Quickest one-way

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 7/11

8:58 am-9:59 pm

1 stop13h 01m

$123

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

Sat 7/18

8:58 am-9:59 pm

1 stop13h 01m

$133

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/6

Showing 1-10 of 15 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 17h 51m. Frontier provides one of the quickest options available for as low as $187. 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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