Cheap flights from California to Ontario from $34
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from California to Ontario departing on 3/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from California to Los Angeles
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Cheap bus & train deals from California to Los Angeles
All round-trip flight deals to Los Angeles
Frontier flights from California to Ontario
Our best Frontier deals on California to Ontario flight tickets
American Airlines flights from California to Ontario
Our best American Airlines deals on California to Ontario flight tickets
See travel insights to Los Angeles from
How to get the cheapest flight ticket from California to Ontario
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest California to Ontario flight route?
Fly from San Francisco to Ontario for the best California - Ontario flight prices
What cabin class options are available on California to Ontario flights?
There are 4 cabin classes available to choose from on California to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from California to Ontario?
Frontier, Southwest, and United Airlines are the most popular carriers operating from California to Ontario
What airlines fly to Ontario?
Frontier, Spirit Airlines and Delta are the top three most popular airlines that fly to Ontario from California according to our data. Frontier is the first choice among our users, with 34% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 10 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.
How many flights depart from California to Ontario on average per day?
18 flights are operational daily from California to Ontario as of January 2025. The most popular departure time for this route is 11:00AM, with 44% of flights per day taking off at noon.
How many flights depart from California to Ontario on average per week?
As of January 2025, there are 130 flights per week flying from California to Ontario. The most common day of the week flights depart is Fri, with 22% of flights taking off on this day.
Cheap California to Ontario flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from California to Ontario
When did momondo last update prices for flights from California to Ontario Airport?
Prices for flights from California to Ontario Airport refresh daily.
How many operators does momondo search for flights from California to Ontario Airport?
As of January 2025, there are 10 operators available to choose from for flights from California to Ontario Airport.
How old do you have to be to fly from California to Ontario Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from California to Ontario?
momondo data reveals that the most frequently booked plane model on the route from California to Ontario is Airbus A320neo, representing 25.31% of all bookings. The subsequent popular models are Airbus A321neo at 13.58%, Airbus A320 (sharklets) at 8.17%, and Embraer 175 (Enhanced Winglets) at 7.81%.
Best airlines flying from California to Ontario
Compare and see reviews for airlines that fly from California to Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $36 | Free Cancellation | Rating 6.0 3,429 reviews | |||
| PriceFrom $37 | Free Cancellation | Rating 6.3 8,075 reviews | |||
| PriceFrom $45 | Free Cancellation | Rating 8.0 8,501 reviews | |||
| PriceFrom $55 | Free Cancellation | Rating 8.0 9,642 reviews | |||
| PriceFrom $78 | Free Cancellation | Rating 8.0 141 reviews | |||
| PriceFrom $136 | Free Cancellation | Rating 7.4 8,944 reviews | |||
| PriceFrom $191 | Free Cancellation | Rating 8.1 4,650 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from California to Ontario?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from California.
Can I find flights from California to Ontario with flexible booking policies on momondo?
All flight searches from California to Ontario on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from California to Ontario?
Once you have performed a search for California to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from California to Ontario right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Ontario from California. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.