San Jose (SJC) to Ontario (ONT) flights
One airline flies nonstop from San Jose (SJC) to Ontario (ONT): 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 SJC to ONT
- Southwest AirlinesNot in an allianceWho books it
SJC to ONT with one stop
4 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Las Vegas (LAS)Frontier Airlines and Southwest Airlines the whole way
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- 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
SJC to ONT: common questions
Which airlines fly nonstop from SJC to ONT?
Southwest Airlines flies nonstop from San Jose (SJC) to Ontario (ONT).
How far is San Jose from Ontario by plane?
San Jose (SJC) and Ontario (ONT) 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 SJC to ONT cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for SJC to ONT with taxes and fees.
Where can I connect between San Jose and Ontario?
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 Frontier 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.