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

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Thu 19/10
Thu 26/10
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Good to know

Low season:
October
Best time to beat the crowds
1%
expected price decrease
High season:
July
Most popular time to fly
11%
expected price increase
Average price:
£1109
(avg. price over the last 72 hours)
Good deal:
£701
or less return trip within
2 months
of travel is a good deal

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, on average, 57 days before departure.
Book at least 3 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 October.
Morning departure is around 5% cheaper 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 non-stop flight takes 10h 15m, covering a distance of 3953 miles.
How many flights are there between Chicago O'Hare International and London?
There are 1,092 (non-stop) flights between Chicago O'Hare International and London per week, averaging 154 per day.
Which airlines provide the cheapest flights from Chicago O'Hare International to London?
In the past 3 days, the cheapest return tickets were found on WOW air (£288), Icelandair (£294) and Multiple Airlines (£311).
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 (18 times daily), Finnair (16 times daily), Iberia (16 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly from Chicago O'Hare International to London?
For Chicago O'Hare International to London, Monday is the cheapest day to fly on average and Friday is the most expensive. Flying from London back to Chicago O'Hare International, the best deals are generally found on Tuesday, with Wednesday being the most expensive.

Book cheap flights from Chicago O'Hare International to London (return)

Airports
Origin
Chicago
£288
only
£288
Destination
London
£311
only
£311
£305
only
£305
£288
only
£288
£312
only
£312
Mon, 30 Oct
ORD
LGW
10h 25m
Mon, 20 Nov
LGW
ORD
10h 55m
£288
Trip: 22 days
Overall 5.8 OK
Based on 914 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
KEF
LGW
Good 7.0

Everything went smoothly enough.

There is no real place for passengers to sit near the gate in Keflavik airport while waiting to board. At least not enough seats to accommodate a huge jet full of people. So this results in giant, awkward lines of people. But once the boarding process started, it went fairly quickly.

BWI
KEF
Good 6.0

Prices. The staff.

No food or water. Paid carry on. No leg room

BOS
KEF
OK 5.0

Having to pay an extra $200 for a normal amount of suitcases. 2 fliers with 1@ carry on and 1@ checked bag. WOW, alright. :( And not even a drink of water.

SFO
KEF
Mediocre 2.0

Cancelled my flight lost out on thousands

KEF
SXF
Mediocre 2.0

No one informed us an international flight don't provide snack meal or at least water for free

Fri, 19 Jan
ORD
LGW
10h 30m
Wed, 24 Jan
LGW
ORD
11h 05m
£294
Trip: 6 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6067 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
CPH
KEF
Excellent 8.4

Ease of ticketing

Not allowed to bring a backpack as carry-on, waited a bit to board the plane. The flight was fine, nothing over the top. What I expected.

JFK
KEF
Excellent 10.0

Good service and good seats

DEN
KEF
Excellent 9.0

Comfortable planes, nice crew, great pilots

No food served

MSP
KEF
Excellent 8.0

I loved how friendly everyone was. I loved the USB port and the entertainment system for each seat.

My seat kept sliding forward from the reclining position which made it difficult to keep sleeping through the overnight flight

ORY
KEF
Excellent 8.0

Having space and room between passengers.

Limited entertainment selections. Except the Icelandic media- which was great!

Tue, 9 Jan
ORD
LTN
18h 25m
Tue, 30 Jan
LTN
ORD
15h 20m
£311
Trip: 22 days
Overall 0.0 Poor
Based on 0 reviews
Tue, 31 Oct
ORD
LGW
10h 25m
Tue, 14 Nov
LGW
ORD
10h 55m
£288
Trip: 15 days
Overall 5.8 OK
Based on 914 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
CDG
KEF
Good 7.6

So inexpensive for the same amount of discomfort as a regular airline. On time, service fine. Then my United connection was an hour late connecting to Phoenix from my WOW on-time flight to LAX, (For which I paid half as much as I did on WOW all the way to Paris. ) I swear the bad reviews are all shills for the full priced airlines.

I lucked out cuz the seat next to me was empty, otherwise I might have had short leg room. I am very short anyway, but this would be bad for tall people.

KEF
LAX
Good 7.6

On time & quite adequate,So inexpensive for the same amount of discomfort as a regular airline. On time, service fine. Then my United connection was an hour late connecting to Phoenix from my WOW on-time flight to LAX, (For which I paid half as much as I did on WOW all the way to Paris. ) I swear the bad reviews are all shills for the full priced airlines.

Long flight - leg room would be bad for tall people.WOW is fine with me.

KEF
SXF
Mediocre 2.0

No one informed us an international flight don't provide snack meal or at least water for free

SXF
KEF
Excellent 10.0

The flight attendants are very easy to look at. The food on board is also surprisingly good.

Nothing!

KEF
LGW
Good 7.0

Everything went smoothly enough.

There is no real place for passengers to sit near the gate in Keflavik airport while waiting to board. At least not enough seats to accommodate a huge jet full of people. So this results in giant, awkward lines of people. But once the boarding process started, it went fairly quickly.

Fri, 19 Jan
ORD
LHR
10h 40m
Wed, 24 Jan
LHR
ORD
10h 55m
£305
Trip: 6 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6067 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
PDX
Excellent 9.6

Descent selection of movies and tv shows helped with the long flight. Flight times are great for reduced layover times in Iceland from PDX to MAN.

MCO
KEF
Excellent 10.0

Friendly staff and easy flight from Orlando!! Can’t wait to fly Icelandair again

Outstanding customer service!

MSP
KEF
Excellent 8.0

I loved how friendly everyone was. I loved the USB port and the entertainment system for each seat.

My seat kept sliding forward from the reclining position which made it difficult to keep sleeping through the overnight flight

KEF
PDX
OK 4.6

Food was as advertised, and entertainment was not at all disappointing.

Seat screwup... IcelandAir screwed up my seat selection and failed in three opportunities to fix it. During online check-in, I swapped my aisle seat for an exit row middle seat with empty standing room in front of me (because I am tall this is important). Skeptical, I verified this twice at Stockholm ARL by checking computer and with the bagge agent. She reassured me I would have long leg room. Upon boarding, I quickly learned I had been misled: I had a middle seat with short leg room and between two passengers. A flight attendant declined to listen or help me even though better seats were available. It turned out to be my worst trans-oceanic flight among 1 to 2 dozen in my life.

DEN
KEF
Excellent 9.0

Comfortable planes, nice crew, great pilots

No food served

Mon, 15 Jan
ORD
LGW
12h 30m
Thu, 25 Jan
LGW
ORD
17h 00m
£312
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Mon, 6 Nov
ORD
LGW
10h 25m
Tue, 7 Nov
LGW
ORD
10h 55m
£288
Trip: 2 days
Overall 5.8 OK
Based on 914 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
CDG
KEF
Good 7.6

So inexpensive for the same amount of discomfort as a regular airline. On time, service fine. Then my United connection was an hour late connecting to Phoenix from my WOW on-time flight to LAX, (For which I paid half as much as I did on WOW all the way to Paris. ) I swear the bad reviews are all shills for the full priced airlines.

I lucked out cuz the seat next to me was empty, otherwise I might have had short leg room. I am very short anyway, but this would be bad for tall people.

EWR
KEF
Excellent 8.0

straightforward, decently cheap last minute flight.

seats not comfortable, water is not free (that should be illegal)

BOS
KEF
OK 5.0

Having to pay an extra $200 for a normal amount of suitcases. 2 fliers with 1@ carry on and 1@ checked bag. WOW, alright. :( And not even a drink of water.

KEF
BOS
Excellent 8.0

New plane with charging ports. Cheap tickets

Not sure how to feel about waiting 40 mins for another flight. Good for those passengers but what about my plans (and 100 other people on the plane)?

BWI
KEF
Good 6.0

Prices. The staff.

No food or water. Paid carry on. No leg room

Mon, 6 Nov
ORD
STN
22h 50m
Mon, 13 Nov
STN
ORD
15h 20m
£312
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Mon, 11 Dec
ORD
LHR
19h 00m
Thu, 11 Jan
LHR
ORD
10h 55m
£315
Trip: 32 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6067 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
OSL
Excellent 8.0

seats were very comfortable. The crew was very friendly.

MCO
KEF
Excellent 10.0

Friendly staff and easy flight from Orlando!! Can’t wait to fly Icelandair again

Outstanding customer service!

MCO
KEF
OK 4.3

Free checked bag

Very uncomfortable seats

PDX
KEF
Excellent 8.0

Efficient travel from PDX to CDG European Union passport check/entry was well staffed and competent Pricing was competitive

JFK
KEF
Excellent 10.0

Good service and good seats

Tue, 7 Nov
ORD
LGW
10h 25m
Mon, 4 Dec
LGW
ORD
10h 55m
£288
Trip: 28 days
Overall 5.8 OK
Based on 914 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
KEF
LGW
Good 7.0

Everything went smoothly enough.

There is no real place for passengers to sit near the gate in Keflavik airport while waiting to board. At least not enough seats to accommodate a huge jet full of people. So this results in giant, awkward lines of people. But once the boarding process started, it went fairly quickly.

BWI
KEF
Good 6.0

Prices. The staff.

No food or water. Paid carry on. No leg room

SFO
KEF
Mediocre 2.0

Cancelled my flight lost out on thousands

PIT
KEF
Good 7.0

Extremely polite and professional staff who spoke English perfectly. Very impressive. And the flights were all on time, which was very much appreciated.

Wish we could have had access to movies. Even if we had to pay to watch them. Overseas flights are too long for no in flight entertainment.

KEF
EWR
Excellent 10.0

The comfort of the entire flight.

Nothing!

Wed, 15 Nov
ORD
LTN
18h 25m
Sun, 19 Nov
LTN
ORD
15h 20m
£312
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Sun, 25 Feb
ORD
LGW
10h 15m
Sun, 4 Mar
LGW
ORD
11h 10m
£316
Trip: 8 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6067 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
PDX
Excellent 9.6

Descent selection of movies and tv shows helped with the long flight. Flight times are great for reduced layover times in Iceland from PDX to MAN.

DEN
KEF
Excellent 9.0

Comfortable planes, nice crew, great pilots

No food served

MCO
KEF
Excellent 10.0

Friendly staff and easy flight from Orlando!! Can’t wait to fly Icelandair again

Outstanding customer service!

ORY
KEF
Excellent 8.0

Having space and room between passengers.

Limited entertainment selections. Except the Icelandic media- which was great!

JFK
KEF
Excellent 10.0

Good service and good seats

Wed, 8 Nov
ORD
LGW
10h 40m
Wed, 22 Nov
LGW
ORD
11h 15m
£288
Trip: 15 days
Overall 5.8 OK
Based on 914 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
SFO
KEF
Mediocre 2.0

Cancelled my flight lost out on thousands

PIT
KEF
Good 7.0

Extremely polite and professional staff who spoke English perfectly. Very impressive. And the flights were all on time, which was very much appreciated.

Wish we could have had access to movies. Even if we had to pay to watch them. Overseas flights are too long for no in flight entertainment.

SXF
KEF
Excellent 10.0

The flight attendants are very easy to look at. The food on board is also surprisingly good.

Nothing!

KEF
LGW
Good 7.0

Everything went smoothly enough.

There is no real place for passengers to sit near the gate in Keflavik airport while waiting to board. At least not enough seats to accommodate a huge jet full of people. So this results in giant, awkward lines of people. But once the boarding process started, it went fairly quickly.

EWR
KEF
Excellent 8.0

straightforward, decently cheap last minute flight.

seats not comfortable, water is not free (that should be illegal)

Tue, 28 Nov
ORD
STN
18h 00m
Mon, 4 Dec
STN
ORD
15h 20m
£312
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Thu, 1 Mar
ORD
LGW
10h 15m
Fri, 9 Mar
LGW
ORD
11h 10m
£316
Trip: 9 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6067 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
PDX
Excellent 9.6

Descent selection of movies and tv shows helped with the long flight. Flight times are great for reduced layover times in Iceland from PDX to MAN.

PDX
KEF
Excellent 8.0

Efficient travel from PDX to CDG European Union passport check/entry was well staffed and competent Pricing was competitive

KEF
OSL
Excellent 8.0

seats were very comfortable. The crew was very friendly.

MCO
KEF
Excellent 10.0

Friendly staff and easy flight from Orlando!! Can’t wait to fly Icelandair again

Outstanding customer service!

JFK
KEF
Excellent 10.0

Good service and good seats

Sun, 12 Nov
ORD
LGW
10h 25m
Wed, 15 Nov
LGW
ORD
10h 55m
£288
Trip: 4 days
Overall 5.8 OK
Based on 914 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
EWR
KEF
Excellent 8.0

straightforward, decently cheap last minute flight.

seats not comfortable, water is not free (that should be illegal)

BWI
KEF
Good 6.0

Prices. The staff.

No food or water. Paid carry on. No leg room

KEF
LGW
Good 7.0

Everything went smoothly enough.

There is no real place for passengers to sit near the gate in Keflavik airport while waiting to board. At least not enough seats to accommodate a huge jet full of people. So this results in giant, awkward lines of people. But once the boarding process started, it went fairly quickly.

PIT
KEF
Good 7.0

Extremely polite and professional staff who spoke English perfectly. Very impressive. And the flights were all on time, which was very much appreciated.

Wish we could have had access to movies. Even if we had to pay to watch them. Overseas flights are too long for no in flight entertainment.

CDG
KEF
Good 7.6

So inexpensive for the same amount of discomfort as a regular airline. On time, service fine. Then my United connection was an hour late connecting to Phoenix from my WOW on-time flight to LAX, (For which I paid half as much as I did on WOW all the way to Paris. ) I swear the bad reviews are all shills for the full priced airlines.

I lucked out cuz the seat next to me was empty, otherwise I might have had short leg room. I am very short anyway, but this would be bad for tall people.

Mon, 4 Dec
ORD
STN
18h 00m
Fri, 8 Dec
STN
ORD
15h 20m
£312
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Mon, 13 Nov
ORD
LGW
10h 40m
Wed, 15 Nov
LGW
ORD
10h 55m
£288
Trip: 3 days
Overall 5.8 OK
Based on 914 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
BOS
KEF
OK 5.0

Having to pay an extra $200 for a normal amount of suitcases. 2 fliers with 1@ carry on and 1@ checked bag. WOW, alright. :( And not even a drink of water.

KEF
BOS
Excellent 8.0

New plane with charging ports. Cheap tickets

Not sure how to feel about waiting 40 mins for another flight. Good for those passengers but what about my plans (and 100 other people on the plane)?

KEF
LGW
Good 7.0

Everything went smoothly enough.

There is no real place for passengers to sit near the gate in Keflavik airport while waiting to board. At least not enough seats to accommodate a huge jet full of people. So this results in giant, awkward lines of people. But once the boarding process started, it went fairly quickly.

KEF
SXF
Mediocre 2.0

No one informed us an international flight don't provide snack meal or at least water for free

CDG
KEF
Good 7.6

So inexpensive for the same amount of discomfort as a regular airline. On time, service fine. Then my United connection was an hour late connecting to Phoenix from my WOW on-time flight to LAX, (For which I paid half as much as I did on WOW all the way to Paris. ) I swear the bad reviews are all shills for the full priced airlines.

I lucked out cuz the seat next to me was empty, otherwise I might have had short leg room. I am very short anyway, but this would be bad for tall people.

Fri, 12 Jan
ORD
LGW
10h 30m
Thu, 25 Jan
LGW
ORD
11h 10m
£318
Trip: 14 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6067 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
DEN
KEF
Excellent 9.0

Comfortable planes, nice crew, great pilots

No food served

KEF
PDX
Excellent 9.6

Descent selection of movies and tv shows helped with the long flight. Flight times are great for reduced layover times in Iceland from PDX to MAN.

ORY
KEF
Excellent 8.0

Having space and room between passengers.

Limited entertainment selections. Except the Icelandic media- which was great!

MCO
KEF
Excellent 10.0

Friendly staff and easy flight from Orlando!! Can’t wait to fly Icelandair again

Outstanding customer service!

JFK
KEF
Excellent 10.0

Good service and good seats

Wed, 3 Jan
ORD
LTN
34h 40m
Wed, 10 Jan
LTN
ORD
15h 20m
£312
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.