Flights from Chicago to Ontario

3 deals on this route

Ontario California aerial with San Gabriel Mountains
$125
$172
Chicago skyline and Lake Michigan
ORDONT
Chicago to Ontario
Frontier Airlines
Nonstop·round trip
Apr 27 – Apr 30
Ontario California aerial with San Gabriel Mountains
$136
$172
Chicago skyline and Lake Michigan
ORDONT
Chicago to Ontario
Frontier Airlines
Nonstop·round trip
Apr 25 – Apr 29
Ontario California aerial with San Gabriel Mountains
$139
$172
Chicago skyline and Lake Michigan
ORDONT
Chicago to Ontario
Frontier Airlines
Nonstop·round trip
Apr 17 – Apr 19