Cheap Flights from Ontario to Illinois
Popular Flights from Ontario to Illinois
- Airfare from Ontario to Chicago from $236 round trip
Did You Know?
- Minneapolis-St Paul, MN has the most direct flights to Illinois.
- The earliest flight from Ontario, CA leaves at 0:10 am.
- There are 43 carriers flying into Illinois.
- The most popular destination from Ontario, CA is Sky Harbor International.
- There are 15 connecting cities from Ontario, CA to Illinois.
- Denver, CO is the most popular connecting city from Ontario, CA to Illinois.