Chicago to Ontario
ORDONT
Fly from Chicago to Ontario starting at USD 75 with Frontier Airlines.
Best fare available on May 23, 2026.
Limited seats. Better plans. Book before it's gone.
Chicago to Ontario cheapest flights this week
Chicago to Ontario monthly flight fare trend
May
from USD 75
Jun
No flights
Jul
No flights
Aug
No flights
Sep
No flights
Oct
No flights
Airport Details
Origin
Chicago
Chicago O'Hare International Airport (ORD)
Chicago, ORD
Zone
Chicago
Elev
680 ft
Destination
Ontario
Ontario International Airport (ONT)
Ontario, ONT
Zone
Los Angeles
Elev
944 ft
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