Ontario to San Jose flights
The cheapest round trip we found from Ontario to San Jose is $93 (Dec 2 – 4, Nonstop), 7% below the usual $100.
ONT to SJC · Round trip · Economy · Prices per person in USD · Price found (3 days ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $91 |
| December 2026 | $88 (cheapest month) |
| January 2027 | $122 |
Cheapest dates in the next 4 months
Round trip, per person-
Dec 2 – 4 2 nights · leave Wed$93 −7% vs usual$93 −7% vs usual Book
Southwest Airlines Nonstop · 1h 15m -
Nov 20 – 27 7 nights · leave Fri$100$100 Book
Southwest Airlines Nonstop · 1h 15m
-
Nov 23 – 27 4 nights · leave Mon$100$100 Book
Southwest Airlines Nonstop · 1h 15m
-
Jan 4 – 7, 2027 3 nights · leave Mon$122 +22% vs usual$122 +22% vs usual Book
Southwest Airlines Nonstop · 1h 15m
-
Nov 26 – 29 3 nights · leave Thu$187 +87% vs usual$187 +87% vs usual Book
Southwest Airlines Nonstop · 1h 15m
-
Nov 25 – 29 4 nights · leave Wed$257 +157% vs usual$257 +157% vs usual Book
Frontier Airlines 1 stop · 2h 45m -
Nov 29 – Dec 1 2 nights · leave Sun$258 +158% vs usual$258 +158% vs usual Book
Southwest Airlines Nonstop · 1h 15m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Plan the rest of your trip
San Jose · Dec 2 – 4- Car rental Economybookings · compare rental companies (opens Economybookings in a new tab)
- Things to do in San Jose Klook · tours and tickets (opens Klook in a new tab)
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Good to know
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Flights to San Jose from other cities
All flights to San Jose Flying the other way? San Jose to Ontario from $89
Ontario to San Jose: questions
How much does a flight from Ontario to San Jose cost?
The cheapest round trip we have found right now is $93, leaving December 2 and returning December 4. The usual price on this route is about $100, so this fare is 7% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Ontario to San Jose?
December 2026, with round trips from $88. The most expensive month in our data is January (from $122). Based on the 3 months ahead we have prices for.
Which airports do Ontario to San Jose flights use?
Ontario airports include Ontario International (ONT). San Jose airports include Norman Y. Mineta San Jose International (SJC). The prices on this page cover every airport in both cities (ONT and SJC are the city codes).
About this route
We track round-trip economy fares from Ontario (United States) to San Jose (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $93, departing December 2 and returning December 4 on a nonstop flight, about 7% below the usual $100. Right now we're following 7 upcoming date combinations on this route. The cheapest month to fly in our data is December, from $88. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.