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Cheap Flights from Ontario (ONT) to San Jose (SJCA)

Compare Ontario International to San Jose flight deals

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Flight deals from Ontario International to San Jose

Looking for a cheap last-minute deal or the best return flight from Ontario International to San Jose? Find the lowest prices on one-way and return tickets right here.
San Jose.$179 per passenger.Departing Sat, 6 Sep, returning Mon, 8 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Sat, 6 Sep, arriving in San Jose International.Inbound direct flight with Southwest Airlines departs from San Jose International on Mon, 8 Sep, arriving in Ontario International.Price includes taxes and charges.From $179, select.
San Jose.$179 per passenger.Departing Sat, 24 Jan, returning Mon, 26 Jan.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Sat, 24 Jan, arriving in San Jose International.Inbound direct flight with Southwest Airlines departs from San Jose International on Mon, 26 Jan, arriving in Ontario International.Price includes taxes and charges.From $179, select.
San Jose.$180 per passenger.Departing Wed, 15 Oct, returning Wed, 15 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Wed, 15 Oct, arriving in San Jose International.Inbound direct flight with Southwest Airlines departs from San Jose International on Wed, 15 Oct, arriving in Ontario International.Price includes taxes and charges.From $180, select.
San Jose.$180 per passenger.Departing Sat, 27 Sep, returning Sat, 4 Oct.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Sat, 27 Sep, arriving in San Jose International.Inbound direct flight with Southwest Airlines departs from San Jose International on Sat, 4 Oct, arriving in Ontario International.Price includes taxes and charges.From $180, select.
San Jose.$180 per passenger.Departing Thu, 6 Nov, returning Thu, 13 Nov.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Thu, 6 Nov, arriving in San Jose International.Inbound direct flight with Southwest Airlines departs from San Jose International on Thu, 13 Nov, arriving in Ontario International.Price includes taxes and charges.From $180, select.
San Jose.$273 per passenger.Departing Fri, 22 Aug, returning Sun, 24 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Ontario International on Fri, 22 Aug, arriving in San Jose International.Inbound indirect flight with Frontier Airlines, departs from San Jose International on Sun, 24 Aug, arriving in Ontario International.Price includes taxes and charges.From $273, select.
San Jose.$276 per passenger.Departing Sat, 30 Aug, returning Wed, 3 Sep.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Sat, 30 Aug, arriving in San Jose International.Inbound direct flight with Southwest Airlines departs from San Jose International on Wed, 3 Sep, arriving in Ontario International.Price includes taxes and charges.From $276, select.
San Jose.$278 per passenger.Departing Wed, 27 Aug, returning Wed, 27 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Ontario International on Wed, 27 Aug, arriving in San Jose International.Inbound direct flight with Southwest Airlines departs from San Jose International on Wed, 27 Aug, arriving in Ontario International.Price includes taxes and charges.From $278, select.

Find the cheapest month to fly from Ontario International to San Jose

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to San Jose flights are currently cheapest in September.
Aug
from $273
Sep
from $179
Oct
from $180
Nov
from $180
Dec
from $288
Jan
from $179
Feb
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Mar
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Apr
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May
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Jun
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Jul
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Direct flights from Ontario International to San Jose

Alternative Ontario International to San Jose routes

Looking for the cheapest, fastest or easiest route from Ontario International to San Jose? You could fly into the following airports instead.

Ontario to San Jose: Flight information

The things to know before you go.
Cheapest flight found$179
Cheapest month to flySeptember
Average flight time1 hr, 16 mins
Most popular airlineSouthwest Airlines
Average flights per week60

Finding cheap flights from Ontario International to San Jose: Frequently asked questions

There are 7 airports in San Jose: San Jose International, San Jose Reid-Hillview, Oakland Metropolitan Oak, San Francisco International, Concord, Carmel Monterey Peninsula, and Sacramento Stockton.
The best price we found for a return flight from Ontario International to San Jose is $179. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 16 minutes is the average flight time from Ontario International to San Jose.
Southwest Airlines flies direct from Ontario International to San Jose.
As of August 2025, there are 60 flights per week flying from Ontario International to San Jose.
The cheapest month to fly from Ontario International to San Jose is usually September.
If you're flying from Ontario International Airport, the cheapest airport near San Jose is San Jose International – which is 4.7 km away from the centre of San Jose. We've found flights into this airport from $179.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to San Jose on Saturday, 6 September 2025.
Yes – the average flight time is 1 hour and 16 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Jose but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Jose is around 40 days in advance, so don’t leave your flight to the last minute.
In August, the average temperature is usually around 20°C. August is typically the warmest month in San Jose, when it usually averages around 28°C. You can expect the least rain in July. The coldest month is January, with temperatures averaging 5°C. The rainiest month is February.
Currently, Southwest Airlines offers the cheapest flight tickets to San Jose.

Travelling from Ontario International Airport (ONT) to San Jose: what you need to know

  • Expect to be in the air for 1 hour 15 minutes. That's the average duration of a direct flight from Ontario International Airport to San Jose.

  • Ontario (the location of Ontario International Airport) and San Jose follow the same timezone — UTC-7.

  • With 15 weekly flights between the two airports, Ontario International Airport (ONT) to Norman Y. Mineta San Jose International Airport (SJC) is the most popular route. Southwest Airlines operates the earliest flight at 06:00. If you're eager to get more out of your day before taking off, the last flight from ONT to SJC is with Southwest Airlines at 20:40.

  • Leave plenty of time to get on your ONT to San Jose flight. Generally, it's best to arrive two hours before international departures and an hour ahead for domestic flights.

  • Taking off during a peak period like school or public holidays? Expect longer lines at check-in and security. Give yourself extra leeway and arrive up to four hours before international flights and two hours ahead of domestic departures.

  • Direct Ontario International Airport to San Jose tickets are available for booking. Norman Y. Mineta San Jose International Airport (SJC) will be your arrival point.

  • Southwest Airlines is a leading airline that offers direct flights from Ontario International Airport to San Jose.

  • ONT is around 5 kilometres from central Ontario. If you're ride-sharing, driving or catching a cab from the centre, it'll take 10 minutes or so to get there, depending on traffic conditions. If you're taking public transport, expect the travel time to be around 1 hour 30 minutes.

  • Want a hassle-free start to your journey? Stay near ONT. Whether you're taking an early flight from Ontario International Airport to San Jose or want to avoid feeling rushed, these hotels have you covered:

  • 83.6% of flights departing from Ontario International Airport arrive at their destination on schedule. With its solid on-time performance, you're unlikely to face delays when taking off from ONT.

  • ONT is located at 2900 E. Airport Drive.

How to find the cheapest flights from Ontario International Airport (ONT) to San Jose

  • $90 is currently the lowest price for a one-way Ontario International Airport to San Jose flight. A return flight ticket starts from $179. These prices can change based on demand and availability.

  • Get cheap flights from ONT to San Jose by booking seven months ahead. Based on our research, that's the sweet spot for finding a bargain.

  • The best month for finding cheap Ontario International Airport to San Jose tickets is November. Use the 'Whole month' tool to compare all available prices, then select the dates that offer the lowest fares.

  • You don't need to check in daily to see if fares have dropped when you create a Price Alert. We'll let you know as soon as there's an updated deal for cheap flights from ONT to San Jose.

  • Find an affordable flight from Ontario International Airport to San Jose with the help of our filters. Choose your ideal departure time, duration and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in San Jose

Norman Y. Mineta San Jose International Airport (SJC)

  • Norman Y. Mineta San Jose International Airport (SJC) is around 6 kilometres from central San Jose. If you're getting a cab or a ride-share, the drive takes about 10 minutes.

  • It'll take around 45 minutes if you're travelling by public transport.

  • If you're arriving on a late flight from Ontario International Airport to San Jose, nothing beats the convenience of staying near the terminal. Pick up your bags from the carousel and then be showered and resting not long after at one of these accommodation options near SJC:

  • Pick up a Norman Y. Mineta San Jose International Airport rental car and discover San Jose and beyond with your own wheels. Europcar, Fox - Rent A Car and Dollar are popular providers you can book with here.

  • To lock in the lowest price, reserve your vehicle from Norman Y. Mineta San Jose International Airport about one week ahead of your flight from ONT to San Jose.

  • You'll find SJC at 1701 Airport Boulevard, Suite B-1130.

Best time to go to San Jose

  • Carefully consider your travel dates before locking in your flight from Ontario International Airport to San Jose. The city comes alive in high season, but prices are generally higher and attractions can get crowded. Go to San Jose in low season for a more relaxed vibe.

  • The warmest month in San Jose is August, with temperatures ranging between 11ºC (52ºF) and 32ºC (90ºF). Lock in your Ontario International Airport to San Jose flight ticket then if that's your idea of comfortable weather.

  • If you like cooler conditions, look for a cheap ticket from ONT to San Jose in January when temperatures average between 3ºC (37ºF) and 18ºC (64ºF).

More about San Jose

  • Start your San Jose trip right by choosing the perfect place to stay. After booking your flight from Ontario International Airport to San Jose, explore our range of accommodation options including:

  • There are so many things to discover in this city it can be hard to figure out where to start. Rosicrucian Egyptian Museum, Winchester Mystery House and San Jose Museum of Art are top sights which should feature on every San Jose itinerary.

Explore more of United States

  • Los Angeles is just one of the many cities in United States waiting to be discovered once you've seen the sights of San Jose. Around 499 kilometres away to the south-east, check out popular attractions including Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • Around 193 kilometres east of San Jose, Fresno is another favourite stop in United States. Start your sightseeing at Forestiere Underground Gardens, Fresno Chaffee Zoo and Shinzen Japanese Garden.

Plan the rest of your trip from Ontario to San Jose

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.