Find Cheap Flights from Chicago to London Heathrow (CHI - LHR)

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

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Chicago to London Heathrow Flight Information

Flights Arrive in London Heathrow
Flights Depart from Chicago
Flight Price $371
Distance 3,936 miles
Airlines Austrian Airlines, Finnair, Air Canada, Virgin Atlantic, Delta, Lufthansa, British Airways, Aer Lingus, Air France

Good to Know

Low Season:
October
Best time to beat the crowds
2%
expected price decrease
High Season:
July
Most popular time to fly
12%
expected price increase
Average Price:
$522
(avg. price over the last 2 weeks)
Good Deal:
$413
or less (round trip)

When to Book Flights from Chicago to London Heathrow

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

Top Tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $412 or less.
The cheapest flight from Chicago to London Heathrow was found 37 days before departure, on average.
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 to London Heathrow Flights

How long does a flight from Chicago to London Heathrow take?
An average nonstop flight takes 7h 40m, covering a distance of 3936 miles.
How many flights are there between Chicago and London Heathrow?
There are 714 (nonstop) flights between Chicago and London Heathrow per week, averaging 103 per day.
Which airlines provide the cheapest flights from Chicago to London Heathrow?
In the past 3 days, the cheapest round-trip tickets were found on Austrian Airlines ($371), Finnair ($374) and Air Canada ($398).
Do I need a passport to fly between Chicago and London Heathrow?
Yes.
Which airlines fly most frequently between Chicago and London Heathrow?
Finnair (10 times daily), British Airways (10 times daily), American Airlines (8 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Chicago to London Heathrow?
For Chicago to London Heathrow, Thursday is the cheapest day to fly on average and Sunday is the most expensive. Flying from London Heathrow back to Chicago, the best deals are generally found on Thursday, with Tuesday being the most expensive.

Find the Flight That Suits You Best

Wed 1/23
Wed 1/30
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Cheapest

Airline
Departure & Arrival Time
Stops
Duration
Austrian Airlines Austrian Airlines
ORD-LHR
12:00a - 12:00a
nonstop
8h 00m
ORD-LHR
$371
Vayama
Austrian Airlines Austrian Airlines
LHR - ORD
12:00a - 12:00a +1
1 stop
34h 25m
LHR - ORD
View Deal

Best

Airline
Departure & Arrival Time
Stops
Duration
Virgin Atlantic Virgin Atlantic
MDW-LHR
12:00a - 12:00a
1 stop
11h 10m
MDW-LHR
$401
StudentUniverse
Virgin Atlantic Virgin Atlantic
LHR - MDW
12:00a - 12:00a
1 stop
12h 25m
LHR - MDW
View Deal

Quickest

Airline
Departure & Arrival Time
Stops
Duration
British Airways British Airways
ORD-LHR
12:00a - 12:00a
nonstop
7h 50m
ORD-LHR
$575
British Airways British Airways
LHR - ORD
12:00a - 12:00a
1 stop
11h 10m
LHR - ORD
View Deal

Earliest

Airline
Departure & Arrival Time
Stops
Duration
Aer Lingus Aer Lingus
ORD-LHR
12:00a - 12:00a
1 stop
11h 00m
ORD-LHR
$590
AerLingus
Aer Lingus Aer Lingus
LHR - ORD
12:00a - 12:00a
1 stop
11h 50m
LHR - ORD
View Deal
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Here's why:

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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.