- Cheapest fare
- $387
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 7h 24m
United Airlines · Thu, Nov 26
from $387
Usually 1+ stop
4,340 km
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Cheapest month to fly from San Jose to Ontario
Lowest one-way fare per person in each month. Choose a month to see every date.
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Getting around
About flights from San Jose to Ontario
San Jose (SJO) and Ontario (ONT) are about 4,340 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 7h 24m. Over the next few months, one-way fares start from $387, and November 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from San Jose to Ontario?
The cheapest one-way fare we've seen recently is $387 with United Airlines, departing Thursday, November 26, 2026. Over the coming months, the lowest fare in each month ranges from $387 to $639.
What is the cheapest month to fly from San Jose to Ontario?
November 2026 currently has the lowest fares, from $387 one way.
Are there direct flights from San Jose to Ontario?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from San Jose to Ontario?
The quickest journey we've seen takes about 7h 24m. San Jose and Ontario are around 4,340 km apart.
Which airlines fly from San Jose to Ontario?
Recent fares on this route were with United Airlines and American Airlines.
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