$87+ Cheap flights from Ontario (ONT) to Riverside, CA
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LAX
Oct 9 — Oct 161
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Riverside with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Riverside
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Best
Last-minute
One-way
Cheapest flights from Ontario to RiversideExplore 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 September 9, 2026.
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 September 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 10/128:35 pm -
1 stop11h 14m
Wed 10/147:03 pm -
1 stop24h 37m
Deal found 9/4![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Sat 10/32:30 pm -
1 stop5h 44m
Tue 10/611:30 am -
1 stop5h 29m
Deal found 9/8![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 10/610:04 am -
1 stop6h 19m
Tue 10/135:15 pm -
1 stop17h 16m
Deal found 9/8![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 10/12:30 pm -
1 stop4h 14m
Wed 10/149:15 am -
1 stop7h 15m
Deal found 9/8![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 10/81:38 pm -
1 stop4h 03m
Mon 10/129:57 pm -
1 stop12h 34m
Deal found 9/8![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Fri 10/28:24 pm -
1 stop11h 23m
Fri 10/99:57 pm -
1 stop11h 12m
Deal found 9/4![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 11/128:35 pm -
1 stop11h 13m
Tue 11/1710:05 am -
1 stop6h 16m
Deal found 9/8![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 9/3010:04 am -
2 stops24h 33m
Tue 10/63:35 pm -
1 stop22h 10m
Deal found 9/8![Frontier logo]()
$182
Best flights from Ontario to RiversideDiscover carefully curated flight deals from Ontario to Riverside that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
Discover carefully curated flight deals from Ontario to Riverside that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 10/128:35 pm -
1 stop11h 14m
Wed 10/147:03 pm -
1 stop24h 37m
Deal found 9/4![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Wed 10/710:04 am -
1 stop6h 19m
Mon 10/129:57 pm -
1 stop12h 34m
Deal found 9/4![Frontier logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 9/3010:04 am -
2 stops24h 33m
Tue 10/63:35 pm -
1 stop22h 10m
Deal found 9/8![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Sat 10/310:04 am -
1 stop6h 19m
Sat 10/1011:19 am -
1 stop5h 11m
Deal found 9/5![Frontier logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/168:00 am -
1 stop7h 10m
Sat 10/247:03 pm -
2 stops19h 31m
Deal found 9/5![Frontier logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 10/55:44 pm -
1 stop29h 20m
Mon 10/129:57 pm -
1 stop12h 34m
Deal found 9/7![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 10/292:23 pm -
1 stop4h 18m
Sat 10/313:41 pm -
1 stop22h 57m
Deal found 9/6![Frontier logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 9/3010:04 am -
2 stops24h 33m
Thu 10/811:20 am -
1 stop5h 10m
Deal found 9/8![Frontier logo]()
$234
Last-minute flights from Ontario to RiversideDiscover last-minute flight deals from Ontario to Riverside. Data last updated September 9, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Riverside. Data last updated September 9, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 9/3010:04 am -
2 stops24h 33m
Tue 10/63:35 pm -
1 stop22h 10m
Deal found 9/8![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 10/12:30 pm -
1 stop4h 14m
Wed 10/149:15 am -
1 stop7h 15m
Deal found 9/8![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Fri 10/28:24 pm -
1 stop11h 23m
Fri 10/99:57 pm -
1 stop11h 12m
Deal found 9/4![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Sat 10/32:30 pm -
1 stop5h 44m
Tue 10/611:30 am -
1 stop5h 29m
Deal found 9/8![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Sat 10/32:30 pm -
1 stop5h 44m
Sat 10/1011:19 am -
1 stop5h 11m
Deal found 9/5![Frontier logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 10/610:04 am -
1 stop6h 19m
Tue 10/135:15 pm -
1 stop17h 16m
Deal found 9/8![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 9/8. 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.
Thu 10/81:38 pm -
1 stop4h 03m
Mon 10/129:57 pm -
1 stop12h 34m
Deal found 9/8![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 10/128:35 pm -
1 stop11h 14m
Wed 10/147:03 pm -
1 stop24h 37m
Deal found 9/4![Frontier logo]()
$116
One-way flights from Ontario to RiversideSearch for one-way flight options from Ontario to Riverside. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
Search for one-way flight options from Ontario to Riverside. Find affordable one-way fares based on user searches. Data last updated September 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Mon 12/72:38 pm -
1 stop8h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 9/7. 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 12/107:11 am -
1 stop7h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Frontier logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Sun 11/18:35 pm -
1 stop22h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 1/47:11 am -
1 stop7h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 12/247:11 am -
1 stop15h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Fri 9/188:00 am -
2 stops14h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 12/246:00 am -
3 stops15h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$402
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 September 9, 2026.
Round-trip from | $116 (Kiwi.com) |
|---|---|
One-way from | $87 (Kiwi.com) |
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 7,457,451 searches. Data last updated September 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
Cheapest round-trip
Quickest round-trip
OntarioLos Angeles
ONT Ontario - LAX Los Angeles
ONTLAX
Ontario
Mon 12/7
2:38 pm-10:58 pm
1 stop8h 20m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$87
OntarioLos Angeles
ONT Ontario - LAX Los Angeles
ONTLAX
Ontario
Mon 10/12
8:35 pm-7:49 am
1 stop11h 14m
Los Angeles
Wed 10/14
7:03 pm-7:40 pm
1 stop24h 37m
$116
OntarioLos Angeles
ONT Ontario - LAX Los Angeles
ONTLAX
Ontario
Sun 11/1
8:35 pm-6:41 pm
1 stop22h 06m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$148
OntarioLos Angeles
ONT Ontario - LAX Los Angeles
ONTLAX
Ontario
Thu 12/10
4:46 pm-2:47 pm
2 stops22h 01m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$160
OntarioLos Angeles
ONT Ontario - LAX Los Angeles
ONTLAX
Ontario
Thu 12/24
7:11 am-10:15 pm
1 stop15h 04m
Los Angeles
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$178
OntarioLos Angeles
ONT Ontario - LAX Los Angeles
ONTLAX
Ontario
Wed 10/7
10:04 am-4:23 pm
1 stop6h 19m
Los Angeles
Mon 10/12
9:57 pm-10:31 am
1 stop12h 34m
$178
OntarioLos Angeles
ONT Ontario - LAX Los Angeles
ONTLAX
Ontario
Wed 9/30
10:04 am-10:37 am
2 stops24h 33m
Los Angeles
Tue 10/6
3:35 pm-1:45 pm
1 stop22h 10m
$182
OntarioLos Angeles
ONT Ontario - LAX Los Angeles
ONTLAX
Ontario
Sat 10/3
10:04 am-4:23 pm
1 stop6h 19m
Los Angeles
Sat 10/10
11:19 am-4:30 pm
1 stop5h 11m
$191
OntarioLos Angeles
ONT Ontario - LAX Los Angeles
ONTLAX
Ontario
Fri 10/16
8:00 am-3:10 pm
1 stop7h 10m
Los Angeles
Sat 10/24
7:03 pm-2:34 pm
2 stops19h 31m
$221
OntarioLos Angeles
ONT Ontario - LAX Los Angeles
ONTLAX
Ontario
Mon 10/5
5:44 pm-11:04 pm
1 stop29h 20m
Los Angeles
Mon 10/12
9:57 pm-10:31 am
1 stop12h 34m
$225
Showing 1-10 of 16 resultsSorted by cheapest first
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.
ONT-LAX
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
ONT-R1V
ONT-LAX
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.
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