Melbourne
Chicago O'Hare Intl
1 stop
29h 40mCathay Pacific
Sydney Kingsford Smith
Chicago O'Hare Intl
1 stop
40h 55mKorean Air
Melbourne
Chicago O'Hare Intl
2 stops
52h 10mMultiple Airlines
Melbourne
Chicago O'Hare Intl
3 stops
31h 05mAir Canada
Melbourne
Chicago O'Hare Intl
2 stops
52h 20mEmirates
Sydney Kingsford Smith
Chicago Midway
2 stops
42h 14mMultiple Airlines
Sydney Kingsford Smith
Chicago O'Hare Intl
1 stop
26h 45mChicago O'Hare Intl
Sydney Kingsford Smith
2 stops
33h 25mANA
Perth
Chicago O'Hare Intl
2 stops
46h 25mChicago O'Hare Intl
Perth
2 stops
47h 20mJapan Airlines
Melbourne
Chicago O'Hare Intl
1 stop
46h 00mChicago O'Hare Intl
Melbourne
1 stop
28h 10mCathay Pacific
Sydney Kingsford Smith
Chicago O'Hare Intl
1 stop
40h 55mChicago O'Hare Intl
Sydney Kingsford Smith
1 stop
26h 50mKorean Air
Perth
Chicago O'Hare Intl
2 stops
42h 15mChicago O'Hare Intl
Perth
2 stops
38h 15mFinnair
Melbourne
Chicago O'Hare Intl
1 stop
38h 25mChicago O'Hare Intl
Melbourne
1 stop
27h 30mAir India
January
$4,775
February
$4,044
March
$4,962
April
$4,882
May
$4,085
June
$1,682
July
$4,525
August
$4,331
September
$2,990
October
$4,262
November
$4,539
December
$4,751
At the present moment the cheapest month to fly business class to Chicago is currently June; with March being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.