Cheap flights from San Jose to Ontario from $49
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Jose to Ontario departing on 5/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from San Jose 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 month to fly to Ontario?
In general, August is the cheapest month to fly from San Jose to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $92. If you aren’t able to travel during the month of August, then book flights to Ontario from San Jose during June instead. Flights to Ontario in June, while not as cheap as those in August, still average around $138.
What is the cheapest day to depart on your flight to Ontario?
The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $209. This is often the case because there is less demand to fly during this day of the week. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from San Jose to Ontario for around $340.
What is the cheapest time of day to depart on your flight to Ontario?
At noon is the cheapest time of day to fly from San Jose to Ontario when you can find flight prices for as low as $252. Flying to Ontario at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $335 on average. Flights to Ontario from San Jose in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.
What is the cheapest San Jose to Ontario flight route?
Fly from San Jose to Ontario for the best San Jose - Ontario flight prices
How far in advance should I book a flight to Ontario?
You are more likely to see cheaper flights to Ontario from San Jose when booking 13 weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $214 when searching 13 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from San Jose for as low as $109 on momondo.
What cabin class options are available on San Jose to Ontario flights?
There are 1 cabin classes available to choose from on San Jose 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 San Jose to Ontario?
Southwest, Frontier, and American Airlines are the most popular carriers operating from San Jose to Ontario
What airlines fly to Ontario?
Frontier, Spirit Airlines and United Airlines are the top three most popular airlines that fly to Ontario from San Jose according to our data. Frontier is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 11 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 San Jose to Ontario on average per week?
6 flights are operational weekly from San Jose to Ontario as of April 2025. The most popular departure day for this route is Tue, with 50% of flights per week taking off on this day.
When to book flights from San Jose to Ontario
Cheap San Jose to Ontario (SJC to ONT) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from San Jose to Ontario
How far is San Jose to Ontario by plane?
The distance between San Jose and Ontario is about 327.8 mi. By plane, this route typically takes 1h 15m.
When did momondo last update prices for flights from San Jose Airport to Ontario Airport?
Prices for flights from San Jose Airport to Ontario Airport were last updated today.
How many operators does momondo search for flights from San Jose Airport to Ontario Airport?
As of April 2025, there are 4 operators available to choose from for flights from San Jose Airport to Ontario Airport.
How old do you have to be to fly from San Jose Airport 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 San Jose Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from San Jose to Ontario?
Based on momondo bookings for flights between San Jose and Ontario, the leading plane model is Boeing 737 MAX 8, making up 19.52% of the total bookings. Other popular models include Boeing 737-700 Passenger/BBJ1 (winglets) with 17.78%, Airbus A320neo with 15.78%, and Boeing 737-800 Passenger/BBJ2 (winglets) with 9.36%.
What is the most popular airline from San Jose to Ontario?
momondo data reveals that the most frequently booked airline on the route from San Jose to Ontario is Southwest, representing 66% of all bookings. The subsequent popular airlines are Frontier at 19%, Spirit Airlines at 10%, and Alaska Airlines at 5%.
Best airlines flying from San Jose to Ontario
Compare and see reviews for airlines that fly from San Jose to Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $34 | Free Cancellation | Rating 6.0 3,279 reviews | |||
| PriceFrom $36 | Free Cancellation | Rating 6.3 7,905 reviews | |||
| PriceFrom $146 | Free Cancellation | Rating 8.0 4,279 reviews | |||
| PriceFrom $178 | Free Cancellation | Rating 8.0 9,848 reviews |
Southwest Flights From San Jose to Ontario
Southwest flight deals from San Jose to Ontario start from $146 round-trip. Over the 6 Southwest flights for this route in a normal week, average airfare is usually $275 round-trip - but some users have found much cheaper deals with momondo.
Why use momondo?
Why should I use momondo to find a flight deal from San Jose to Ontario?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Jose to Ontario. momondo saves you time and could save you money on your trip.
Can I find flights from San Jose to Ontario with flexible booking policies on momondo?
Flights from San Jose to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from San Jose to Ontario?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Jose to Ontario.
I’m not ready to book a flight from San Jose to Ontario right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of San Jose to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.