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Riverside

$82+ 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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
dic. 17 — dic. 241
mié. 12/17
mié. 12/24
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 noviembre 17, 2025.

Round-trip from

$128
(Kiwi.com)

One-way from

$82
(Kiwi.com)
From Ontario to Riverside
Search Deals
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 noviembre 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/16. 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.
lun. 12/152:59 pmONT - LAX
1 stop30h 12mFrontier
lun. 12/226:58 pmLAX - ONT
1 stop5h 14mFrontier
Deal found 11/16$137
This Kiwi.com deal was found by Cheapflights users on 11/16. 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.
mar. 12/96:15 amONT - LAX
1 stop13h 50mFrontier
lun. 2/26:30 amLAX - ONT
1 stop17h 50mFrontier
Deal found 11/16$144
This Kiwi.com deal was found by Cheapflights users on 11/16. 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.
dom. 12/142:30 pmONT - LAX
1 stop26h 40mMultiple Airlines
dom. 12/219:20 pmLAX - ONT
1 stop19h 55mMultiple Airlines
Deal found 11/16$161
This Kiwi.com deal was found by Cheapflights users on 11/16. 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.
vie. 12/510:12 pmONT - LAX
1 stop25h 29mFrontier
lun. 12/86:21 pmLAX - ONT
1 stop5h 10mFrontier
Deal found 11/16$174
This Kiwi.com deal was found by Cheapflights users on 11/16. 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.
jue. 12/186:17 pmONT - LAX
1 stop17h 59mMultiple Airlines
mar. 12/235:59 pmLAX - ONT
1 stop23h 16mMultiple Airlines
Deal found 11/16$183
This Kiwi.com deal was found by Cheapflights users on 11/16. 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.
mar. 12/96:15 amONT - LAX
1 stop13h 50mMultiple Airlines
dom. 2/11:14 amLAX - ONT
2 stops10h 56mMultiple Airlines
Deal found 11/16$218
This Kiwi.com deal was found by Cheapflights users on 11/16. 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.
sáb. 12/133:20 pmONT - LAX
2 stops18h 43mMultiple Airlines
sáb. 1/35:59 pmLAX - ONT
1 stop5h 22mMultiple Airlines
Deal found 11/16$228

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 noviembre 17, 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

lun. 1/12

2:34 pm-7:21 pm

1 stop4h 47m

Los Angeles

mar. 1/20

9:12 am-2:12 pm

1 stop5h 00m

$128

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

vie. 1/9

10:18 pm-10:36 am

1 stop12h 18m

Los Angeles

sáb. 1/17

7:10 am-10:59 pm

1 stop15h 49m

$132

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

lun. 12/15

2:59 pm-9:11 pm

1 stop30h 12m

Los Angeles

lun. 12/22

6:58 pm-12:12 am

1 stop5h 14m

$137

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

mar. 12/9

6:15 am-8:05 pm

1 stop13h 50m

Los Angeles

lun. 2/2

6:30 am-12:20 am

1 stop17h 50m

$144

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

vie. 1/9

10:18 pm-8:15 am

1 stop9h 57m

Los Angeles

sáb. 1/17

9:12 am-10:59 pm

2 stops13h 47m

$157

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

sáb. 12/13

3:20 pm-7:42 am

1 stop16h 22m

Los Angeles

sáb. 12/20

9:20 pm-5:42 pm

1 stop20h 22m

$157

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

dom. 12/14

2:30 pm-5:10 pm

1 stop26h 40m

Los Angeles

dom. 12/21

9:20 pm-5:15 pm

1 stop19h 55m

$161

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

sáb. 12/13

3:20 pm-7:42 am

1 stop16h 22m

Los Angeles

sáb. 1/3

9:20 pm-5:42 pm

1 stop20h 22m

$174

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

mar. 12/9

6:15 am-8:05 pm

1 stop13h 50m

$82

OntarioLos Angeles

ONT - LAX

ONTLAX

Ontario

jue. 12/4

2:59 pm-8:05 pm

1 stop5h 06m

$95

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 16 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, March is the cheapest month in which you can book a flight from Ontario to Riverside (average of $102). Flying from Ontario to Riverside in July is currently the most expensive (average of $282). 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.

What is the cheapest time of day to fly from ONT to R1V?

Find hourly flight availability from Ontario to Riverside. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated noviembre 17, 2025.

It’s optimal to fly from Ontario to Riverside in the evening. By choosing this option you can save up to 84% on the cost of your flight, compared to a flight at noon.

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 12h 18m. Frontier provides one of the quickest options available for as low as $132. 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.

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

    Currently, March is the cheapest month in which you can book a flight from Ontario to Riverside (average of $102). Flying from Ontario to Riverside in July is currently the most expensive (average of $282). 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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