Find Deals on International Flights to Chicago O'Hare International

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from worldwide to Chicago O'Hare International

(Round-trip)
Depart: Wed Aug 30 2017 Return: Thu Sep 7 2017 Trip spans 9 days
Spirit Airlines
Spirit Airlines
BOS
ORD
2h 47m
nonstop
ORD
BOS
2h 33m
nonstop
Depart: Fri Dec 15 2017 Return: Mon Dec 18 2017 Trip spans 4 days
American Airlines
American Airlines
ATL
ORD
2h 12m
nonstop
ORD
ATL
2h 02m
nonstop
Depart: Sat Sep 2 2017 Return: Sat Sep 16 2017 Trip spans 15 days
Spirit Airlines
Spirit Airlines
BOS
ORD
2h 47m
nonstop
ORD
BOS
2h 33m
nonstop
Depart: Tue Aug 29 2017 Return: Wed Sep 6 2017 Trip spans 9 days
Frontier
Frontier
TTN
ORD
2h 23m
nonstop
ORD
TTN
2h 11m
nonstop
Depart: Fri Aug 18 2017 Return: Fri Aug 25 2017 Trip spans 8 days
United
United
LAX
ORD
3h 56m
nonstop
ORD
LAX
4h 32m
nonstop
Depart: Sat Sep 9 2017 Return: Wed Sep 13 2017 Trip spans 5 days
Spirit Airlines
Spirit Airlines
BOS
ORD
2h 50m
nonstop
ORD
BOS
2h 30m
nonstop
Depart: Sat Dec 2 2017 Return: Tue Dec 12 2017 Trip spans 11 days
JetBlue
JetBlue
JFK
ORD
2h 47m
nonstop
ORD
JFK
2h 13m
nonstop
Depart: Sat Jan 27 2018 Return: Sun Jan 28 2018 Trip spans 2 days
Delta
Delta
JFK
ORD
2h 46m
nonstop
ORD
JFK
2h 21m
nonstop
Depart: Wed Oct 18 2017 Return: Tue Oct 24 2017 Trip spans 7 days
Spirit Airlines
Spirit Airlines
BOS
ORD
2h 50m
nonstop
ORD
BOS
2h 26m
nonstop
Depart: Tue Oct 31 2017 Return: Thu Nov 2 2017 Trip spans 3 days
Spirit Airlines
Spirit Airlines
BOS
ORD
2h 50m
nonstop
ORD
BOS
2h 30m
nonstop
Depart: Sat Nov 4 2017 Return: Mon Nov 6 2017 Trip spans 3 days
Spirit Airlines
Spirit Airlines
BOS
ORD
2h 50m
nonstop
ORD
BOS
2h 30m
nonstop
Depart: Thu Dec 21 2017 Return: Fri Jan 5 2018 Trip spans 16 days
American Airlines
American Airlines
ATL
ORD
2h 12m
nonstop
ORD
ATL
2h 14m
nonstop
Depart: Thu Oct 5 2017 Return: Fri Oct 20 2017 Trip spans 16 days
Aeromexico
Aeromexico
MEX
ORD
23h 49m
1 stop
ORD
MEX
10h 05m
1 stop
Depart: Sat Dec 2 2017 Return: Tue Dec 5 2017 Trip spans 4 days
Virgin America
Virgin America
SFO
ORD
4h 05m
nonstop
ORD
SFO
4h 55m
nonstop
Depart: Sun Sep 3 2017 Return: Wed Sep 6 2017 Trip spans 4 days
Frontier
Frontier
TTN
ORD
2h 23m
nonstop
ORD
TTN
2h 11m
nonstop
Depart: Sun Nov 19 2017 Return: Fri Nov 24 2017 Trip spans 6 days
United
United
ATL
ORD
2h 06m
nonstop
ORD
ATL
2h 00m
nonstop
Depart: Wed Jul 26 2017 Return: Mon Jul 31 2017 Trip spans 6 days
American Airlines
American Airlines
BOS
ORD
2h 55m
nonstop
ORD
BOS
2h 34m
nonstop
Depart: Tue Oct 17 2017 Return: Fri Oct 20 2017 Trip spans 4 days
Interjet
Interjet
MEX
ORD
4h 05m
nonstop
ORD
MEX
4h 20m
nonstop
Depart: Tue Oct 3 2017 Return: Tue Oct 10 2017 Trip spans 8 days
Frontier
Frontier
TTN
ORD
2h 16m
nonstop
ORD
TTN
2h 14m
nonstop
Depart: Fri Dec 1 2017 Return: Tue Dec 5 2017 Trip spans 5 days
United
United
LAX
ORD
4h 20m
nonstop
ORD
LAX
4h 32m
nonstop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

San Francisco
$223
New York
$127
Atlanta
$83
Los Angeles
$119
Trenton
$118
Mexico City
$219
Boston
$55
Destination

Chicago
$55
Airlines Airline reviews

824 travelers who booked a flight from Boston to Chicago rated their chosen airlines with an average of 7.1.

Overall
7.2
Boarding
7.4
Crew
7.8
Comfort
7.0
Food
6.3
Entertainment
6.3