Your next trip, last seen at €67
Lowest observedFrontier Airlines · 1 stop · One wayWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
- Lowest observed
- €67, departing 26 Nov 2026 (Last checked: 12 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 91Check live prices for this route
- Airlines seen
- Southwest Airlines, Alaska Airlines, Frontier Airlines, United Airlines
- Typical journey time
- 15h 38m
- Non-stop
- Yes
About this route
Explore the fares we observed from San Jose to Ontario. Prices move often, so pick your dates to see the latest options.
- Route distance
- 530 km
- Typical journey time
- 15h 38m
- Airlines seen
- Southwest Airlines, Alaska Airlines, Frontier Airlines, United Airlines
Route-level information; individual journeys vary.
Published schedules report non-stop service with Southwest Airlines. Check current timetables.
A clearer picture of your fare
Airport to city: straight-line distance
- Ontario International Airport (ONT) → Ontario, city gazetteer reference point (34.0500, -117.6400): ≈ 4 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by departure month
Cheapest month from San Jose to Ontario: November 2026, from €67 (checked 12 Oct 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| October 2026 | €154 | 18 |
| November 2026 | €67 | 30 |
| December 2026 | €72 | 31 |
| January 2027 | €76 | 12 |
Lowest fare by day of the week
Cheapest day of the week from San Jose to Ontario: Monday, from €67 (checked 12 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €67 | 13 |
| Tuesday | €114 | 13 |
| Wednesday | €94 | 13 |
| Thursday | €67 | 13 |
| Friday | €72 | 13 |
| Saturday | €94 | 13 |
| Sunday | €67 | 13 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from San Jose to Ontario by days until departure (31 to 60 days): €67 (checked 12 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €204 | 6 |
| 8 to 30 days | €76 | 23 |
| 31 to 60 days | €67 | 30 |
| 61 days or more | €72 | 32 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Lowest one-way fare we saw per airline
Cheapest airline from San Jose to Ontario: Frontier Airlines, from €67 (checked 12 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Frontier Airlines | €67Nov 22, 2026 | 66 |
| United Airlines | €126Nov 17, 2026 | 10 |
| Alaska Airlines | €144Nov 18, 2026 | 15 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from San Jose to Ontario?
The lowest fare we have observed is €67, found on 12 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from San Jose to Ontario?
Cheapest month from San Jose to Ontario: November 2026, from €67 (checked 12 Oct 2026).
Are there direct flights from San Jose to Ontario?
Yes. We have seen non-stop flights on this route, flown by Southwest Airlines.
Which airlines fly from San Jose to Ontario?
These are the carriers we have seen on the route: Southwest Airlines, Alaska Airlines, Frontier Airlines, United Airlines.
How long does the flight from San Jose to Ontario take?
The average journey time across the 91 fares we observed is 14h 45m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
Which day of the week is cheapest from San Jose to Ontario?
Cheapest day of the week from San Jose to Ontario: Monday, from €67 (checked 12 Oct 2026).
Which airline has the lowest fare from San Jose to Ontario?
Cheapest airline from San Jose to Ontario: Frontier Airlines, from €67 (checked 12 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
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Recently observed fares. Prices may change.
Last checked: 12 Oct 2026