Nonstop flights from Ontario to Chicago

2 airlines fly from Ontario (ONT) to 2 Chicago airports (MDW and ORD), with up to 2 flights a day.

ONTMDW

Routes

2 airport pairs

Ontario time

7:00a11:55pFirst departure 7:00 AM, last 11:55 PM

One morning flight at 7:00 AM, then one evening flight at 11:55 PM. Every flight runs daily.

Earliest first

Schedules last checked Sep 19, 2026. Times are local.

Southwest Airlines flies daily on the Boeing 737 MAX 8. United Airlines flies daily on the Boeing 737.

There are 2 flights every day of the week. The first arrival in Chicago is at 1:10 PM and the last at 5:45 AM the next day.

ONT to MDW is the busiest airport pair, with 7 flights a week, then ONT to ORD with 7.

Flying back, Chicago to Ontario has 14 nonstop flights a week.

Schedules as of Oct 9, 2026.