Nonstop flights from Ontario to Chicago
United Airlines flies this route daily.
ONTOntario International
1,696 mi · 7 flights a week
ORDChicago O'Hare International
When they leave
Ontario time7:00a7:00aDeparts 7:00 AM
One departure, at 7:00 AM. It runs daily.
Every flight
Earliest first
Schedules last checked Sep 8, 2026. Times are local.
Flying from Ontario to Chicago
United Airlines is the only airline flying nonstop from Ontario to Chicago, daily on the Boeing 737.
The flight covers 1,696 miles.
Flying back, Chicago to Ontario has 7 nonstop flights a week. From Ontario, Midway (MDW) is the other Chicago area airport with nonstop flights, 7 a week.
Return flights
Every Chicago airport
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Find the cheapest day to fly from Ontario to Chicago.
Schedules as of Oct 9, 2026.