Our website uses cookies for technical, analytical and marketing purposes. Here is more information. If you agree to this, just keep browsing. close

Find Cheap Flights from Chicago to London (CHI - LON)

Search hundreds of travel sites at once for deals on flights to London

Sat 21/10
Sat 28/10
Any month
Compare vs KAYAK |

Good to know

Low season:
October
Best time to beat the crowds
2%
expected price decrease
High season:
July
Most popular time to fly
10%
expected price increase
Average price:
£789
(avg. price over the last 72 hours)
Good deal:
£688
or less return trip within
3 months
of travel is a good deal

When to Book Flights from Chicago 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 to London was found, on average, 43 days before departure.
Book at least 4 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 3% 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 to London Flights

How long does a flight from Chicago to London take?
An average non-stop flight takes 10h 15m, covering a distance of 3947 miles.
How many flights are there between Chicago and London?
There are 1,082 (non-stop) flights between Chicago and London per week, averaging 152 per day.
Which airlines provide the cheapest flights from Chicago to London?
In the past 3 days, the cheapest return tickets were found on WOW air (£288), Multiple Airlines (£312) and Icelandair (£318).
Do I need a passport to fly between Chicago and London?
Yes.
Which airlines fly most frequently between Chicago and London?
British Airways (17 times daily), American Airlines (16 times daily), Finnair (16 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly from Chicago to London?
For Chicago to London, Tuesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from London back to Chicago, the best deals are generally found on Tuesday, with Wednesday being the most expensive.

Book cheap flights from Chicago to London (return)

Airports
Origin
Chicago
£288
only
£288
Destination
London
£313
only
£313
£288
only
£288
£312
only
£312
Tue, 31 Oct
ORD
LGW
10h 40m
Tue, 21 Nov
LGW
ORD
11h 15m
£288
Trip: 22 days
Overall 5.8 OK
Based on 923 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
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
SXF
Mediocre 2.0

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

BOS
KEF
OK 4.6

Delayed/Missed Checked-In Baggage

YYZ
KEF
OK 4.0

Way overpriced for a budget airline for everything. It is no Ryanair!

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.

Mon, 20 Nov
ORD
STN
18h 00m
Thu, 30 Nov
STN
ORD
28h 50m
£312
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Sat, 13 Jan
ORD
LGW
10h 15m
Fri, 26 Jan
LGW
ORD
11h 10m
£318
Trip: 14 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6079 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 9.3

Excellent on board entertainment.

No meal on board for an international flight.

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.

KEF
OSL
Excellent 8.0

seats were very comfortable. The crew was very friendly.

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 923 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
YYZ
KEF
OK 4.0

Way overpriced for a budget airline for everything. It is no Ryanair!

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
SXF
Mediocre 2.0

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

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.

BOS
KEF
OK 4.6

Delayed/Missed Checked-In Baggage

Tue, 16 Jan
ORD
STN
18h 00m
Tue, 23 Jan
STN
ORD
15h 20m
£312
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Mon, 20 Nov
ORD
LGW
10h 40m
Sun, 10 Dec
LGW
ORD
11h 15m
£288
Trip: 21 days
Overall 5.8 OK
Based on 923 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
BOS
KEF
OK 4.6

Delayed/Missed Checked-In Baggage

YYZ
KEF
OK 4.0

Way overpriced for a budget airline for everything. It is no Ryanair!

KEF
FRA
OK 4.6

Delayed/Missed Checked-In Baggage

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.

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.

Sun, 14 Jan
ORD
LGW
10h 15m
Thu, 25 Jan
LGW
ORD
11h 10m
£318
Trip: 12 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6079 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
MCO
KEF
Excellent 10.0

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

Outstanding customer service!

KEF
JFK
Good 7.6

The inflight entertainment was really nice and enjoyed the Iceland layover information. Crew were professional and attentive.

Felt like a budget airline, so don't expect any free snacks or the ability to carry on large backpacks that you normally could on other airlines.

KEF
CPH
Excellent 10.0

Great

DEN
KEF
Excellent 9.3

Excellent on board entertainment.

No meal on board for an international flight.

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.

Mon, 15 Jan
ORD
LTN
18h 25m
Mon, 22 Jan
LTN
ORD
15h 20m
£313
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Tue, 28 Nov
ORD
LGW
10h 40m
Sun, 3 Dec
LGW
ORD
11h 15m
£288
Trip: 6 days
Overall 5.8 OK
Based on 923 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
LGW
KEF
OK 5.3

It was on time

Cabin Baggage allowance even smaller than usual Plane still had rubbish in seat pockets Food and drink more expensive than usual

BOS
KEF
OK 4.0

Flight delayed due to apparent lack of flight plan.

KEF
FRA
OK 4.6

Delayed/Missed Checked-In Baggage

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.

BOS
KEF
OK 4.6

Delayed/Missed Checked-In Baggage

Wed, 17 Jan
ORD
LGW
10h 15m
Fri, 26 Jan
LGW
ORD
11h 10m
£318
Trip: 10 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6079 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

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.

KEF
OSL
Excellent 8.0

seats were very comfortable. The crew was very friendly.

MCO
KEF
OK 4.3

Free checked bag

Very uncomfortable seats

Fri, 19 Jan
ORD
LTN
18h 25m
Fri, 26 Jan
LTN
ORD
15h 20m
£316
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 1 Dec
ORD
LGW
10h 40m
Mon, 11 Dec
LGW
ORD
11h 15m
£288
Trip: 11 days
Overall 5.8 OK
Based on 923 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.

EWR
KEF
Excellent 8.0

straightforward, decently cheap last minute flight.

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

KEF
FRA
OK 4.6

Delayed/Missed Checked-In Baggage

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.

LGW
KEF
OK 5.3

It was on time

Cabin Baggage allowance even smaller than usual Plane still had rubbish in seat pockets Food and drink more expensive than usual

Fri, 19 Jan
ORD
LGW
10h 30m
Sat, 27 Jan
LGW
ORD
11h 10m
£318
Trip: 9 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6079 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
JFK
Good 7.6

The inflight entertainment was really nice and enjoyed the Iceland layover information. Crew were professional and attentive.

Felt like a budget airline, so don't expect any free snacks or the ability to carry on large backpacks that you normally could on other airlines.

JFK
KEF
Excellent 10.0

Good service and good seats

ORY
KEF
Excellent 8.0

Having space and room between passengers.

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

DEN
KEF
Excellent 9.3

Excellent on board entertainment.

No meal on board for an international flight.

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.

Fri, 9 Feb
ORD
STN
18h 00m
Mon, 19 Feb
STN
ORD
15h 20m
£316
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Sun, 3 Dec
ORD
LGW
10h 40m
Sun, 10 Dec
LGW
ORD
11h 15m
£288
Trip: 8 days
Overall 5.8 OK
Based on 923 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
BOS
KEF
OK 4.0

Flight delayed due to apparent lack of flight plan.

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
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
SXF
Mediocre 2.0

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

EWR
KEF
Excellent 8.0

straightforward, decently cheap last minute flight.

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

Sat, 20 Jan
ORD
LGW
10h 15m
Sat, 27 Jan
LGW
ORD
11h 10m
£318
Trip: 8 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6079 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
MCO
KEF
Excellent 10.0

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

Outstanding customer service!

DEN
KEF
Excellent 9.3

Excellent on board entertainment.

No meal on board for an international flight.

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
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.

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.

Mon, 19 Feb
ORD
STN
18h 00m
Wed, 28 Feb
STN
ORD
15h 20m
£316
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Tue, 5 Dec
ORD
LGW
10h 40m
Tue, 12 Dec
LGW
ORD
11h 15m
£288
Trip: 8 days
Overall 5.8 OK
Based on 923 reviews
Overall
6.1
Boarding
6.4
Comfort
5.7
Crew
7.1
Entertainment
4.1
Food
4.7
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)?

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
SXF
Mediocre 2.0

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

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
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.

Sun, 21 Jan
ORD
LGW
10h 15m
Thu, 25 Jan
LGW
ORD
11h 10m
£318
Trip: 5 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6079 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
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!

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

JFK
KEF
Excellent 10.0

Good service and good seats

DEN
KEF
Excellent 9.3

Excellent on board entertainment.

No meal on board for an international flight.

Wed, 21 Feb
ORD
STN
21h 20m
Wed, 28 Feb
STN
ORD
15h 20m
£316
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Show more results
*
Prices are per person, are for e–tickets and include all taxes & fees in GBP.

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 prices, so it’s not possible for us to guarantee what other companies are selling.

We aggregate tons of data for you
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 don't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car hires 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.

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.

^
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.