Nonstop flights to Ontario

Which cities have nonstop flights to Ontario (ONT)?

Ontario International Airport (ONT) has nonstop service from 26 of the airports we track — 541 flights a week in total. The busiest direct routes into Ontario are from Denver (DEN), Seattle (SEA) and Phoenix (PHX), and Southwest, Alaska, Frontier and American carry the traffic.

Each row below links to that airport's route page — the airlines, the days it flies and recent departure times — and to fares for the day you want. Flying out of ONT instead? Ontario has 29 nonstop destinations of its own. Route data updated October 2026 from observed departures.

Route data updated October 2026 from observed flight departures. Schedules change — always confirm with the airline before booking.