Chicago
Ko Samui
BEST
DEAL
Sun, 19 May
ORD - USM
Wed, 22 May
USM - ORD
$1843
$1819
Prime price per passenger
Chicago
Ko Samui
BEST
DEAL
Mon, 12 Aug
ORD - USM
$717
$701
Prime price per passenger
Chicago
Ko Samui
BEST
DEAL
Fri, 24 May
ORD - USM
Mon, 27 May
USM - ORD
$1776
$1763
Prime price per passenger