Chicago
Portland
BEST
DEAL
Sun., 19 May
MDW - PDX
Tue., 21 May
PDX - MDW
$367
$354
Prime price per passenger
Chicago
Portland
BEST
DEAL
Thu., 09 May
ORD - PDX
$67
$63
Prime price per passenger
Chicago
Portland
BEST
DEAL
Sat., 04 May
ORD - PDX
Sun., 05 May
PDX - ORD
$212
$201
Prime price per passenger