Cheap Flights from Ontario to Illinois
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Popular Flights from Ontario to Illinois
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.
Cheap Domestic Flights from Ontario - ONT
Delta, United, US Airways, American, Alaska
US Airways, United, Delta, American
US Airways, American, Delta, United
Cheap Flights from Ontario to Illinois - from $380 Round trip from ONT to IL