$113+ Cheap flights from Ontario to California
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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Ontario to California 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 California
Cheapest flights from Ontario to CaliforniaExplore the most affordable flight options available from Ontario to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
Explore the most affordable flight options available from Ontario to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
This Super.com deal was found by Cheapflights users on 1/28. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Trip.com deal was found by Cheapflights users on 1/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Kiwi.com deal was found by Cheapflights users on 1/29. 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.
This FlightHub deal was found by Cheapflights users on 1/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This FlightHub deal was found by Cheapflights users on 1/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This oojo deal was found by Cheapflights users on 1/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Booking.com deal was found by Cheapflights users on 1/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Find flight deals from Ontario to California
Keep the following information in mind while searching for Ontario to California flight deals. Data was last updated January 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $153 (Kiwi.com) |
One-way from | $113 (Kiwi.com) |
Popular in | December |
Cheapest in | May |
Average price | $327 |
Good round-trip deal | $195 or less |
Good one-way deal | $139 or less |
Cheapflights Fare Finder
Use the filters below to find and compare flights from Ontario to California that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
TorontoLas Vegas
YYZ - LAS
YYZLAS
Toronto Pearson Intl
Mon 3/23
8:00 pm-10:12 pm
Nonstop5h 12m
Las Vegas Harry Reid Intl
Mon 3/30
9:15 pm-7:36 pm
2 stops19h 21m
TorontoLas Vegas
YYZ - LAS
YYZLAS
Toronto Pearson Intl
Sat 4/18
4:18 pm-9:08 pm
1 stop7h 50m
Las Vegas Harry Reid Intl
Sat 4/25
11:45 pm-10:04 am
1 stop7h 19m
TorontoLas Vegas
YYZ - LAS
YYZLAS
Toronto Pearson Intl
Tue 5/12
1:00 pm-8:48 pm
2 stops10h 48m
Las Vegas Harry Reid Intl
Wed 5/13
10:16 am-10:36 pm
1 stop9h 20m
TorontoLas Vegas
YYZ - LAS
YYZLAS
Toronto Pearson Intl
Fri 4/24
12:45 pm-10:13 pm
1 stop12h 28m
Las Vegas Harry Reid Intl
Sun 5/3
11:59 pm-3:46 pm
1 stop12h 47m
TorontoLas Vegas
YYZ - LAS
YYZLAS
Toronto Pearson Intl
Tue 4/7
7:00 am-6:41 pm
2 stops14h 41m
Las Vegas Harry Reid Intl
Tue 4/14
11:59 pm-11:49 am
1 stop8h 50m
TorontoLas Vegas
YYZ - LAS
YYZLAS
Toronto Pearson Intl
Wed 2/25
3:30 pm-11:55 pm
2 stops11h 25m
Las Vegas Harry Reid Intl
Mon 3/9
7:03 pm-2:20 pm
2 stops16h 17m
TorontoLas Vegas
YYZ - LAS
YYZLAS
Toronto Pearson Intl
Sun 4/26
10:45 am-8:58 pm
1 stop13h 13m
Las Vegas Harry Reid Intl
Fri 5/1
9:05 am-9:32 pm
1 stop9h 27m
TorontoLas Vegas
YYZ - LAS
YYZLAS
Toronto Pearson Intl
Fri 4/3
12:45 pm-10:13 pm
1 stop12h 28m
Las Vegas Harry Reid Intl
Tue 4/7
10:50 am-11:59 pm
2 stops10h 09m
TorontoLas Vegas
YYZ - LAS
YYZLAS
Toronto Pearson Intl
Fri 5/8
5:15 pm-9:59 pm
1 stop7h 44m
Las Vegas Harry Reid Intl
Tue 5/12
11:59 pm-11:49 am
1 stop8h 50m
TorontoSan Francisco
YYZ - SFO
YYZSFO
Toronto Pearson Intl
Thu 4/23
10:15 pm-12:10 pm
2 stops16h 55m
San Francisco
Tue 4/28
1:00 pm-1:05 am
1 stop9h 05m
Best time to book a flight from Ontario to California
Have a flexible travel schedule? Discover the best time to fly to California from Ontario with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Ontario to California
What is the cheapest month to book a flight from Region of Ontario to California?
Currently, August is the cheapest month in which you can book a flight from Region of Ontario to California (average of $80). Flying from Region of Ontario to California in December is currently the most expensive (average of $198). 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 ON to CA?
Find hourly flight availability from Ontario to California. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 29, 2026.
When flying from Region of Ontario to California, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 50% versus a flight in the afternoon.
What is the cheapest day to fly from Region of Ontario to California?
Use this chart to determine the cheapest time to fly round-trip from Ontario to California. Price data was last updated on January 24, 2026.
Travelers seeking maximum savings on their Region of Ontario to California flight should consider departing on Monday evenings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Region of Ontario to California
Explore weekly flight availability from Ontario to California. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 29, 2026.
The most flights from CAON to USCA are scheduled on a Wednesday (18 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (9 on average).
Reviews of airlines servicing California
Get insights into the airlines that provide service to California. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to California. Reviews last updated January 29, 2026.
Read through reviews of airlines operating flights from Ontario to California, such as Porter Airlines, Delta, and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
Boarding
Comfort
Overall
Crew
Entertainment
Reviews
Mohameed,Nov 2025
LAS - YYZ
Food
Boarding
Comfort
Overall
Crew
Entertainment
Reviews
Mohameed,Nov 2025
LAS - YYZ
Food
Boarding
Comfort
Overall
Crew
Entertainment
Reviews
Mohameed,Nov 2025
LAS - YYZ
Food
Boarding
Comfort
Overall
Crew
Entertainment
Reviews
Mohameed,Nov 2025
LAS - YYZ
Food
Boarding
Comfort
Overall
Crew
Entertainment
Reviews
Mohameed,Nov 2025
LAS - YYZ
Food
Boarding
Comfort
Overall
Crew
Entertainment
Reviews
Mohameed,Nov 2025
LAS - YYZ
Related info for your journey
Find useful and relevant information for your journey from Ontario to California. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Ontario to California
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from Ontario to California
Discover the top 7 airlines that operate flights from Ontario to California. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$102 | Average$434 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$111 | Average$261 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$132 | Average$345 | FlexibilityNo cancel fee | On-time52% | |
| Cheapest$139 | Average$439 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$152 | Average$416 | FlexibilityNo cancel fee | On-time50% | |
| Cheapest$162 | Average$415 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$228 | Average$479 | FlexibilityNo cancel fee | On-time71% |