Ontario (ONT) to San Jose (SJC) flights
One airline flies nonstop from Ontario (ONT) to San Jose (SJC): Southwest Airlines. The two airports are 334 miles (537 km) apart. There are also 4 ways to fly it with one stop, through Las Vegas, Phoenix and Salt Lake City and more.
Airlines flying nonstop from ONT to SJC
- Southwest AirlinesNot in an allianceWho books it
ONT to SJC with one stop
4 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Las Vegas (LAS)Southwest Airlines and Frontier Airlines the whole way
+1 - Via Phoenix (PHX)American Airlines and Southwest Airlines the whole way
- Via Salt Lake City (SLC)Delta Air Lines the whole way
- Via Boise (BOI)Alaska Airlines the whole way
ONT to SJC: common questions
Which airlines fly nonstop from ONT to SJC?
Southwest Airlines flies nonstop from Ontario (ONT) to San Jose (SJC).
How far is Ontario from San Jose by plane?
Ontario (ONT) and San Jose (SJC) are 334 miles (537 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
How many miles does ONT to SJC cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for ONT to SJC with taxes and fees.
Where can I connect between Ontario and San Jose?
The most direct connections are through Las Vegas (LAS), Phoenix (PHX), Salt Lake City (SLC) and Boise (BOI). On 4 of them the same airline flies both flights, for example Southwest Airlines through Las Vegas.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.