Nonstop flights from Ontario to Chicago
Southwest Airlines flies this route daily.
ONTOntario International
1,703 mi · 7 flights a week
MDWChicago Midway International
When they leave
Ontario time11:55p11:55pDeparts 11:55 PM
One departure, at 11:55 PM. It runs daily.
Every flight
Earliest first
Schedules last checked Sep 19, 2026. Times are local.
Flying from Ontario to Chicago
Southwest Airlines is the only airline flying nonstop from Ontario to Chicago, daily on the Boeing 737 MAX 8.
The flight covers 1,703 miles.
Flying back, Chicago to Ontario has 7 nonstop flights a week. From Ontario, O'Hare (ORD) 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.