Find Cheap Flights from Chicago O'Hare International to London (ORD - LON)

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Fri 12/15
Fri 12/22
Any month
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Good to Know

Low Season:
February
Best time to beat the crowds
3%
expected price decrease
High Season:
July
Most popular time to fly
20%
expected price increase
Average Price:
$1815
(avg. price over the last 2 weeks)
Good Deal:
$1815
or less (round trip)

When to Book Flights from Chicago O'Hare International to London

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

The cheapest flight from Chicago O'Hare International to London was found 37 days before departure, on average.
Book at least 2 weeks before departure in order to get a below-average price.
High season is considered to be June, July and August. The cheapest month to fly is February.
Morning departure is around 23% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Chicago O'Hare International to London Flights

How long does a flight from Chicago O'Hare International to London take?
An average nonstop flight takes 10h 40m, covering a distance of 3953 miles.
How many flights are there between Chicago O'Hare International and London?
There are 478 (nonstop) flights between Chicago O'Hare International and London per week, averaging 70 per day.
Which airlines provide the cheapest flights from Chicago O'Hare International to London?
In the past 3 days, the cheapest round-trip tickets were found on Multiple Airlines ($336) and WOW air ($339)
Do I need a passport to fly between Chicago O'Hare International and London?
Yes.
Which airlines fly most frequently between Chicago O'Hare International and London?
American Airlines (10 times daily), Finnair (9 times daily), British Airways (8 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Chicago O'Hare International to London?
For Chicago O'Hare International to London, Friday is the cheapest day to fly on average and Sunday is the most expensive. Flying from London back to Chicago O'Hare International, the best deals are generally found on Sunday, with Friday being the most expensive.

Book cheap flights from Chicago O'Hare International to London (round-trip)

Airports
Origin
Chicago
$336
only
$336
Destination
London
$336
only
$336
$339
only
$339
$338
only
$338
Fri, Feb 2
ORD
LTN
18h 25m
Mon, Feb 5
LTN
ORD
15h 20m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jan 16
ORD
LGW
10h 40m
Wed, Jan 31
LGW
ORD
11h 15m
Trip: 16 days
5.8OkayShow reviews
Overall 5.8 Okay
Based on 1123 reviews
Overall
6.0
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.2
Food
4.7
DUB
KEF
Okay 5.0

price was a'ight

The seating was so cramped and stifling that I no longer had the will to live; I begged God to please take me from this planet...alas, to no avail.

BOS
KEF
Excellent 8.0

Staff was helpful and nice

Having to pay for bags no matter if you carry on or check. It's just hidden fees.

ORD
KEF
Okay 4.0

price

everything else

EWR
KEF
Good 7.5

For the price this was an excellent option to get to Iceland.

Boarding process was chaotic.

CDG
KEF
Okay 5.3

Boarding process for WOW is chaotic and disorganized- everyone boards at once with lines from two different directions.

Wed, Jan 31
ORD
STN
21h 20m
Mon, Feb 5
STN
ORD
15h 20m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Jan 22
ORD
LGW
10h 40m
Mon, Feb 19
LGW
ORD
11h 15m
Trip: 29 days
5.8OkayShow reviews
Overall 5.8 Okay
Based on 1123 reviews
Overall
6.0
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.2
Food
4.7
CDG
KEF
Okay 5.3

Boarding process for WOW is chaotic and disorganized- everyone boards at once with lines from two different directions.

BWI
KEF
Okay 5.6

Crew was Great A+

Every leg of flight was delayed and very late arriving to our destination

CDG
KEF
Good 6.0

We of course liked the cost and convenience of the Pittsburgh location.

When we missed our flight out of Paris due to a long wait at passport control, WOW customer service would not work with us. We did not ask for refunds or even hotel reimbursement we simply asked to be booked on the next days flight to Pittsburgh and WOW refused making us purchase new tickets for over $1000.

ORD
KEF
Mediocre 2.0

NOTHING.

Cheap flight sounds great...except it’s not actually cheap. Once you add on charges for baggage, seats, water on board, etc., it’s about the price of a standard ticket on a quality airline. (Plus they didn’t actually reserve the seats I paid $20 for, even though I have the receipt). Amenities on board are atrocious. No Wifi, no in flight entertainment (except an iPad you can pay $25 for that features 10 movies from 1992), no USB ports...you even have to pay for water!!! My flight was delayed twice in one week causing me to miss my connecting flights both to my destination and back home by 5 minutes. Because they are not a member of an airline alliance, my only options were to wait until the next day and stay in a shared hotel room or rebook on another airline for $600 which they couldn’t guarantee I would be reimbursed for. The general apathy shown by the staff and lack of communication is abhorrent. The least they could do is apologize and help direct me to somewhere I could find more information. They were positively clueless! Spend a little extra and book on a respectable airline that values their customers...and maybe you won’t be out $1200 (in addition to the cost of the “cheap” tickets) like I am!!

BOS
KEF
Excellent 8.0

Staff was helpful and nice

Having to pay for bags no matter if you carry on or check. It's just hidden fees.

Fri, Feb 2
ORD
STN
22h 50m
Wed, Feb 7
STN
ORD
15h 20m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jan 23
ORD
LGW
10h 40m
Fri, Jan 26
LGW
ORD
11h 15m
Trip: 4 days
5.8OkayShow reviews
Overall 5.8 Okay
Based on 1123 reviews
Overall
6.0
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.2
Food
4.7
DUB
KEF
Okay 5.0

price was a'ight

The seating was so cramped and stifling that I no longer had the will to live; I begged God to please take me from this planet...alas, to no avail.

KEF
EWR
Okay 5.0

the crew wears handsome uniforms. Everyone looks nice.

Oh my god, I felt like a sardine. They developed their passenger seating scheme by carefully studying Iraqi prison torture manuals, I think. I didn't die but that outcome was surprising to me.

CDG
KEF
Okay 5.3

Boarding process for WOW is chaotic and disorganized- everyone boards at once with lines from two different directions.

SXF
KEF
Okay 4.6

The staff was nice

I will not ever fly Wow again. I paid more than my friends did to get to Europe and they got meals and drinks as well as free baggage.

CDG
KEF
Good 6.0

We of course liked the cost and convenience of the Pittsburgh location.

When we missed our flight out of Paris due to a long wait at passport control, WOW customer service would not work with us. We did not ask for refunds or even hotel reimbursement we simply asked to be booked on the next days flight to Pittsburgh and WOW refused making us purchase new tickets for over $1000.

Sun, Feb 25
ORD
STN
19h 20m
Wed, Feb 28
STN
ORD
15h 20m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Feb 5
ORD
LGW
10h 40m
Mon, Feb 26
LGW
ORD
11h 15m
Trip: 22 days
5.8OkayShow reviews
Overall 5.8 Okay
Based on 1123 reviews
Overall
6.0
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.2
Food
4.7
KEF
EWR
Okay 5.0

the crew wears handsome uniforms. Everyone looks nice.

Oh my god, I felt like a sardine. They developed their passenger seating scheme by carefully studying Iraqi prison torture manuals, I think. I didn't die but that outcome was surprising to me.

CDG
KEF
Okay 5.3

Boarding process for WOW is chaotic and disorganized- everyone boards at once with lines from two different directions.

ORD
KEF
Okay 4.0

price

everything else

ORD
KEF
Mediocre 2.0

NOTHING.

Cheap flight sounds great...except it’s not actually cheap. Once you add on charges for baggage, seats, water on board, etc., it’s about the price of a standard ticket on a quality airline. (Plus they didn’t actually reserve the seats I paid $20 for, even though I have the receipt). Amenities on board are atrocious. No Wifi, no in flight entertainment (except an iPad you can pay $25 for that features 10 movies from 1992), no USB ports...you even have to pay for water!!! My flight was delayed twice in one week causing me to miss my connecting flights both to my destination and back home by 5 minutes. Because they are not a member of an airline alliance, my only options were to wait until the next day and stay in a shared hotel room or rebook on another airline for $600 which they couldn’t guarantee I would be reimbursed for. The general apathy shown by the staff and lack of communication is abhorrent. The least they could do is apologize and help direct me to somewhere I could find more information. They were positively clueless! Spend a little extra and book on a respectable airline that values their customers...and maybe you won’t be out $1200 (in addition to the cost of the “cheap” tickets) like I am!!

CDG
KEF
Good 6.0

We of course liked the cost and convenience of the Pittsburgh location.

When we missed our flight out of Paris due to a long wait at passport control, WOW customer service would not work with us. We did not ask for refunds or even hotel reimbursement we simply asked to be booked on the next days flight to Pittsburgh and WOW refused making us purchase new tickets for over $1000.

Tue, Feb 13
ORD
LGW
10h 40m
Tue, Feb 20
LGW
ORD
11h 15m
Trip: 8 days
5.8OkayShow reviews
Overall 5.8 Okay
Based on 1123 reviews
Overall
6.0
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.2
Food
4.7
KEF
EWR
Okay 5.0

the crew wears handsome uniforms. Everyone looks nice.

Oh my god, I felt like a sardine. They developed their passenger seating scheme by carefully studying Iraqi prison torture manuals, I think. I didn't die but that outcome was surprising to me.

CDG
KEF
Good 6.0

We of course liked the cost and convenience of the Pittsburgh location.

When we missed our flight out of Paris due to a long wait at passport control, WOW customer service would not work with us. We did not ask for refunds or even hotel reimbursement we simply asked to be booked on the next days flight to Pittsburgh and WOW refused making us purchase new tickets for over $1000.

BWI
KEF
Okay 5.6

Crew was Great A+

Every leg of flight was delayed and very late arriving to our destination

LGW
KEF
Okay 4.6

Good design

Most uncomfortable seats I've experienced. They charge for EVERYTHING, even water. They actively sell Duty Free several times.

EWR
KEF
Good 7.5

For the price this was an excellent option to get to Iceland.

Boarding process was chaotic.

Mon, Feb 5
ORD
LTN
18h 25m
Thu, Feb 8
LTN
ORD
31h 35m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Feb 19
ORD
LGW
10h 40m
Fri, Feb 23
LGW
ORD
11h 15m
Trip: 5 days
5.8OkayShow reviews
Overall 5.8 Okay
Based on 1123 reviews
Overall
6.0
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.2
Food
4.7
EWR
KEF
Good 7.5

For the price this was an excellent option to get to Iceland.

Boarding process was chaotic.

BOS
KEF
Excellent 8.0

Staff was helpful and nice

Having to pay for bags no matter if you carry on or check. It's just hidden fees.

KEF
EWR
Okay 5.0

the crew wears handsome uniforms. Everyone looks nice.

Oh my god, I felt like a sardine. They developed their passenger seating scheme by carefully studying Iraqi prison torture manuals, I think. I didn't die but that outcome was surprising to me.

DUB
KEF
Okay 5.0

price was a'ight

The seating was so cramped and stifling that I no longer had the will to live; I begged God to please take me from this planet...alas, to no avail.

BWI
KEF
Okay 5.6

Crew was Great A+

Every leg of flight was delayed and very late arriving to our destination

Wed, Feb 7
ORD
LTN
18h 25m
Tue, Feb 20
LTN
ORD
25h 45m
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Feb 21
ORD
LGW
10h 40m
Wed, Mar 7
LGW
ORD
11h 15m
Trip: 15 days
5.8OkayShow reviews
Overall 5.8 Okay
Based on 1123 reviews
Overall
6.0
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.2
Food
4.7
CDG
KEF
Good 6.0

We of course liked the cost and convenience of the Pittsburgh location.

When we missed our flight out of Paris due to a long wait at passport control, WOW customer service would not work with us. We did not ask for refunds or even hotel reimbursement we simply asked to be booked on the next days flight to Pittsburgh and WOW refused making us purchase new tickets for over $1000.

BWI
KEF
Okay 5.6

Crew was Great A+

Every leg of flight was delayed and very late arriving to our destination

EWR
KEF
Good 7.5

For the price this was an excellent option to get to Iceland.

Boarding process was chaotic.

CDG
KEF
Okay 5.3

Boarding process for WOW is chaotic and disorganized- everyone boards at once with lines from two different directions.

ORD
KEF
Okay 4.0

price

everything else

Wed, Feb 21
ORD
STN
18h 00m
Thu, Mar 1
STN
ORD
27h 15m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Apr 11
ORD
LGW
10h 45m
Wed, Apr 25
LGW
ORD
17h 05m
Trip: 15 days
5.8OkayShow reviews
Overall 5.8 Okay
Based on 1123 reviews
Overall
6.0
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.2
Food
4.7
DUB
KEF
Excellent 10.0

USB chargers on every seat.

Extra charge on carry on bags.

LGW
KEF
Okay 4.6

Good design

Most uncomfortable seats I've experienced. They charge for EVERYTHING, even water. They actively sell Duty Free several times.

BOS
KEF
Excellent 8.0

Staff was helpful and nice

Having to pay for bags no matter if you carry on or check. It's just hidden fees.

CDG
KEF
Good 6.0

We of course liked the cost and convenience of the Pittsburgh location.

When we missed our flight out of Paris due to a long wait at passport control, WOW customer service would not work with us. We did not ask for refunds or even hotel reimbursement we simply asked to be booked on the next days flight to Pittsburgh and WOW refused making us purchase new tickets for over $1000.

DUB
KEF
Okay 5.0

price was a'ight

The seating was so cramped and stifling that I no longer had the will to live; I begged God to please take me from this planet...alas, to no avail.

Sun, Jan 14
ORD
LTN
18h 25m
Mon, Jan 22
LTN
ORD
15h 20m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Apr 17
ORD
LGW
20h 30m
Wed, Apr 25
LGW
ORD
17h 05m
Trip: 9 days
5.8OkayShow reviews
Overall 5.8 Okay
Based on 1123 reviews
Overall
6.0
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.2
Food
4.7
CDG
KEF
Good 6.0

We of course liked the cost and convenience of the Pittsburgh location.

When we missed our flight out of Paris due to a long wait at passport control, WOW customer service would not work with us. We did not ask for refunds or even hotel reimbursement we simply asked to be booked on the next days flight to Pittsburgh and WOW refused making us purchase new tickets for over $1000.

ORD
KEF
Mediocre 2.0

NOTHING.

Cheap flight sounds great...except it’s not actually cheap. Once you add on charges for baggage, seats, water on board, etc., it’s about the price of a standard ticket on a quality airline. (Plus they didn’t actually reserve the seats I paid $20 for, even though I have the receipt). Amenities on board are atrocious. No Wifi, no in flight entertainment (except an iPad you can pay $25 for that features 10 movies from 1992), no USB ports...you even have to pay for water!!! My flight was delayed twice in one week causing me to miss my connecting flights both to my destination and back home by 5 minutes. Because they are not a member of an airline alliance, my only options were to wait until the next day and stay in a shared hotel room or rebook on another airline for $600 which they couldn’t guarantee I would be reimbursed for. The general apathy shown by the staff and lack of communication is abhorrent. The least they could do is apologize and help direct me to somewhere I could find more information. They were positively clueless! Spend a little extra and book on a respectable airline that values their customers...and maybe you won’t be out $1200 (in addition to the cost of the “cheap” tickets) like I am!!

DUB
KEF
Excellent 10.0

USB chargers on every seat.

Extra charge on carry on bags.

BWI
KEF
Okay 5.6

Crew was Great A+

Every leg of flight was delayed and very late arriving to our destination

BOS
KEF
Excellent 8.0

Staff was helpful and nice

Having to pay for bags no matter if you carry on or check. It's just hidden fees.

Wed, Feb 7
ORD
LTN
24h 10m
Fri, Feb 16
LTN
ORD
15h 20m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 3
ORD
LGW
14h 30m
Thu, May 10
LGW
ORD
17h 00m
Trip: 8 days
5.8OkayShow reviews
Overall 5.8 Okay
Based on 1123 reviews
Overall
6.0
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.2
Food
4.7
ORD
KEF
Mediocre 2.0

NOTHING.

Cheap flight sounds great...except it’s not actually cheap. Once you add on charges for baggage, seats, water on board, etc., it’s about the price of a standard ticket on a quality airline. (Plus they didn’t actually reserve the seats I paid $20 for, even though I have the receipt). Amenities on board are atrocious. No Wifi, no in flight entertainment (except an iPad you can pay $25 for that features 10 movies from 1992), no USB ports...you even have to pay for water!!! My flight was delayed twice in one week causing me to miss my connecting flights both to my destination and back home by 5 minutes. Because they are not a member of an airline alliance, my only options were to wait until the next day and stay in a shared hotel room or rebook on another airline for $600 which they couldn’t guarantee I would be reimbursed for. The general apathy shown by the staff and lack of communication is abhorrent. The least they could do is apologize and help direct me to somewhere I could find more information. They were positively clueless! Spend a little extra and book on a respectable airline that values their customers...and maybe you won’t be out $1200 (in addition to the cost of the “cheap” tickets) like I am!!

KEF
EWR
Okay 5.0

the crew wears handsome uniforms. Everyone looks nice.

Oh my god, I felt like a sardine. They developed their passenger seating scheme by carefully studying Iraqi prison torture manuals, I think. I didn't die but that outcome was surprising to me.

CDG
KEF
Good 6.0

We of course liked the cost and convenience of the Pittsburgh location.

When we missed our flight out of Paris due to a long wait at passport control, WOW customer service would not work with us. We did not ask for refunds or even hotel reimbursement we simply asked to be booked on the next days flight to Pittsburgh and WOW refused making us purchase new tickets for over $1000.

LGW
KEF
Okay 4.6

Good design

Most uncomfortable seats I've experienced. They charge for EVERYTHING, even water. They actively sell Duty Free several times.

DUB
KEF
Excellent 10.0

USB chargers on every seat.

Extra charge on carry on bags.

Tue, Feb 20
ORD
STN
21h 20m
Tue, Feb 27
STN
ORD
15h 20m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Show more results
*
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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.