Chicago to Ontario
ORDONT
Fly from Chicago to Ontario starting at USD 217 with Frontier Airlines.
Best fare available on Jun 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
Jun
from USD 217
Jul
No flights
Aug
No flights
Sep
No flights
Oct
No flights
Nov
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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