Question 1

How long does a flight from Chicago to London take?

Accepted Answer

Direct flights take on average 7h 40m to travel the 10,202 km between Chicago and London. Visit our flight page for the latest deals!>/a>

Question 2

How many flights are there between Chicago O'Hare Intl Airport and London Heathrow Airport per day?

Accepted Answer

Each day, there are 7 nonstop flights that take off from Chicago O'Hare Intl Airport and land in London Heathrow Airport, with an average flight time of 7h 56m. The most common departure time is 5:00 p.m. and most flights take off in the evening. Each week, there are 49 flights and there are the same amount of flights each day (7). Visit our flight page for the latest deals!>/a>

Question 3

How many flights are there between Chicago O'Hare Intl Airport and London Heathrow Airport per day?

Accepted Answer

Each day, there are 7 nonstop flights that take off from Chicago O'Hare Intl Airport and land in London Heathrow Airport, with an average flight time of 7h 56m. The most common departure time is 5:00 p.m. and most flights take off in the evening. Each week, there are 49 flights and there are the same amount of flights each day (7). Visit our flight page for the latest deals!>/a>

Question 4

What is the cheapest flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

Accepted Answer

In the last 3 days, the lowest price for a flight from Chicago O'Hare Intl Airport to London Heathrow Airport was C$ 518 for a one-way ticket and C$ 771 for a round-trip. <a href='/flight-routes/Chicago-O-Hare-Intl-ORD/London-Heathrow-LHR'>Visit our flight page for the latest deals!>/a>

Question 5

Which airlines fly most frequently between Chicago and London?

Accepted Answer

United Airlines connects Chicago to London with 21 flights per week. American Airlines also offers 14 flights per week, while British Airways follows with 14 flights per week. Visit our flight page for the latest deals!>/a>

Question 6

Which airlines fly most frequently between Chicago and London?

Accepted Answer

United Airlines connects Chicago to London with 21 flights per week. American Airlines also offers 14 flights per week, while British Airways follows with 14 flights per week. Visit our flight page for the latest deals!>/a>

Question 7

What’s the cheapest day of the week to fly from Chicago to London?

Accepted Answer

For Chicago to London, Monday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from London back to Chicago, the best deals are generally found on Saturday, with Tuesday being the most expensive. Visit our flight page for the latest deals!>/a>

Question 8

What’s the cheapest day of the week to fly from Chicago to London?

Accepted Answer

For Chicago to London, Monday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from London back to Chicago, the best deals are generally found on Saturday, with Tuesday being the most expensive. Visit our flight page for the latest deals!>/a>

Question 9

What’s the earliest departure time from Chicago to London?

Accepted Answer

Early birds can take the earliest flight from Chicago O'Hare Intl Airport at 3:45 pm and will be landing in London Heathrow Airport at 5:55 am.

Question 10

What’s the latest departure time from Chicago to London?

Accepted Answer

If you prefer to fly at night, the latest flight from Chicago O'Hare Intl Airport to London Heathrow Airport jets off at 9:45 pm and lands at 11:35 am.

Question 11

Which airlines fly direct between Chicago O'Hare Intl Airport and London Heathrow Airport?

Accepted Answer

There is just one airline that flies from Chicago O'Hare Intl Airport to London Heathrow Airport direct and that is British Airways. The best round-trip deal found from British Airways for the route is C$ 668.

Question 12

Which airlines fly direct between Chicago O'Hare Intl Airport and London Heathrow Airport?

Accepted Answer

There is just one airline that flies from Chicago O'Hare Intl Airport to London Heathrow Airport direct and that is British Airways. The best round-trip deal found from British Airways for the route is C$ 668.

Question 13

Which airlines offer Wi-Fi service onboard planes from Chicago to London?

Accepted Answer

All the following airlines offer inflight Wi-Fi service on the Chicago to London flight route: British Airways, Iberia, Finnair, American Airlines, Alaska Airlines, SWISS, and United Airlines.

Question 14

Which aircraft models fly most regularly from Chicago to London?

Accepted Answer

The Boeing 787-9 Dreamliner is the aircraft model that flies most regularly on the Chicago to London flight route.

Question 15

Which airline alliances offer flights from Chicago to London?

Accepted Answer

oneworld is the only airline alliance operating flights between Chicago and London.

Question 16

On which days can I fly direct from Chicago to London?

Accepted Answer

There are direct flights from Chicago to London on a daily basis.

Question 17

What is the cheapest month to fly from Chicago O'Hare Intl Airport to London Heathrow Airport?

Accepted Answer

The cheapest month for flights from Chicago O'Hare Intl Airport to London Heathrow Airport is April, where tickets cost C$ 930 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is C$ 1,728 and C$ 1,335 respectively.

Question 18

What is the cheapest month to fly from Chicago O'Hare Intl Airport to London Heathrow Airport?

Accepted Answer

The cheapest month for flights from Chicago O'Hare Intl Airport to London Heathrow Airport is April, where tickets cost C$ 930 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is C$ 1,728 and C$ 1,335 respectively.

Question 19

How does KAYAK find such low prices on flights from Chicago to London?

Accepted Answer

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to London. <a href='/flight-routes/Chicago-O-Hare-Intl-ORD/London-Heathrow-LHR'>Visit our flight page for the latest deals!>/a>

Question 20

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago to London?

Accepted Answer

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Chicago is likely to change within 7 days, so travellers know whether to wait or book now. <a href='/flight-routes/Chicago-O-Hare-Intl-ORD/London-Heathrow-LHR'>Visit our flight page for the latest deals!>/a>

Question 21

What is the Hacker Fare option on flights from Chicago to London?

Accepted Answer

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Chicago with another airline. <a href='/flight-routes/Chicago-O-Hare-Intl-ORD/London-Heathrow-LHR'>Visit our flight page for the latest deals!>/a>

Question 22

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to London?

Accepted Answer

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. <a href='/flight-routes/Chicago-O-Hare-Intl-ORD/London-Heathrow-LHR'>Visit our flight page for the latest deals!>/a>

Question 23

How often are flights from Chicago to London delayed?

Accepted Answer

Weekly flights between Chicago and London historically see delays in approximately 25% of cases, with the average delay over the past year being 168 minutes.

Question 24

Which airline has the best punctuality record on Chicago to London flights?

Accepted Answer

Based on our data, United Airlines have experienced the fewest delays on this route in the past 12 months, with only about 23% of their flights encountering any delays.

Question 25

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Statistically, Tuesday is the day of the week with the fewest delays on this flight route, while Thursday has typically experienced more delays than other days.

Question 26

What is the most punctual flight time for Chicago to London flights?

Accepted Answer

Typically, flights leaving in the early afternoon tend to face fewer delays, whereas flights at night have historically encountered delays more often.

Question 27

Which cabin class options are there for flights between Chicago O'Hare Intl Airport and London Heathrow Airport?

Accepted Answer

There are 3 cabin class options for the route. These are Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 28

Which cabin class options are there for flights between Chicago O'Hare Intl Airport and London Heathrow Airport?

Accepted Answer

There are 3 cabin class options for the route. These are Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Question 29

Which airlines provide the cheapest flights from Chicago to London?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Chicago to London were found on Scandinavian Airlines (C$ 814) and United Airlines (C$ 858).

Question 30

Which airlines provide the cheapest flights from Chicago to London?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Chicago to London were found on Scandinavian Airlines (C$ 814) and United Airlines (C$ 858).

Question 31

How far in advance should I book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

Accepted Answer

To get a below average price on the flight from Chicago O'Hare Intl Airport to London Heathrow Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Question 32

How far in advance should I book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

Accepted Answer

To get a below average price on the flight from Chicago O'Hare Intl Airport to London Heathrow Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Question 33

Can I save money by flying with a layover from Chicago O'Hare Intl Airport to London Heathrow Airport?

Accepted Answer

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 877 on average.

Question 34

Can I save money by flying with a layover from Chicago O'Hare Intl Airport to London Heathrow Airport?

Accepted Answer

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 877 on average.

Question 35

How much is a round-trip flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

Accepted Answer

Flight prices are below average for this route right now.Flights to London Heathrow Airport from Chicago O'Hare Intl Airport usually cost between C$ 984 and C$ 1,821 in March.
The lowest price found in the past 3 days was C$ 771 on Scandinavian Airlines (10 Mar-10 Apr).

Low season	February
High season	October
Cheapest flight	C$ 518

ORD - LHR

C$ 518 Find Cheap Flights from Chicago to London

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

Everything you should know

Cheap Flights from Chicago to Heathrow (ORD-LHR)

Recent round-trip flight deals from Chicago to Heathrow

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KAYAK's insights & trends for Chicago to Heathrow flights

Get data-powered insights and trends into flights from Chicago to Heathrow to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

What’s the cheapest day of the week to fly from Chicago to London?

For Chicago to London, Monday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from London back to Chicago, the best deals are generally found on Saturday, with Tuesday being the most expensive.

What is the cheapest month to fly from Chicago O'Hare Intl Airport to London Heathrow Airport?

The cheapest month for flights from Chicago O'Hare Intl Airport to London Heathrow Airport is April, where tickets cost C$ 930 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is C$ 1,728 and C$ 1,335 respectively.

Can I save money by flying with a layover from Chicago O'Hare Intl Airport to London Heathrow Airport?

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 877 on average.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

To get a below average price on the flight from Chicago O'Hare Intl Airport to London Heathrow Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Which airlines provide the cheapest flights from Chicago to London?

In the past 3 days, the cheapest round-trip tickets from Chicago to London were found on Scandinavian Airlines (C$ 814) and United Airlines (C$ 858).

Which airlines fly most frequently between Chicago and London?

United Airlines connects Chicago to London with 21 flights per week. American Airlines also offers 14 flights per week, while British Airways follows with 14 flights per week.

Which airlines fly direct between Chicago O'Hare Intl Airport and London Heathrow Airport?

There is just one airline that flies from Chicago O'Hare Intl Airport to London Heathrow Airport direct and that is British Airways. The best round-trip deal found from British Airways for the route is C$ 668.

How often are flights from Chicago to London delayed?

Weekly flights between Chicago and London historically see delays in approximately 25% of cases, with the average delay over the past year being 168 minutes.

What is the most punctual flight time for Chicago to London flights?

Typically, flights leaving in the early afternoon tend to face fewer delays, whereas flights at night have historically encountered delays more often.

What day of the week experiences the fewest flight delays on this route?

Statistically, Tuesday is the day of the week with the fewest delays on this flight route, while Thursday has typically experienced more delays than other days.

Which airline has the best punctuality record on Chicago to London flights?

Based on our data, United Airlines have experienced the fewest delays on this route in the past 12 months, with only about 23% of their flights encountering any delays.

Which cabin class options are there for flights between Chicago O'Hare Intl Airport and London Heathrow Airport?

There are 3 cabin class options for the route. These are Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How many flights are there between Chicago O'Hare Intl Airport and London Heathrow Airport per day?

How long does a flight from Chicago to London take?

Direct flights take on average 7h 40m to travel the 10,202 km between Chicago and London.

What’s the earliest departure time from Chicago to London?

Early birds can take the earliest flight from Chicago O'Hare Intl Airport at 3:45 pm and will be landing in London Heathrow Airport at 5:55 am.

What’s the latest departure time from Chicago to London?

If you prefer to fly at night, the latest flight from Chicago O'Hare Intl Airport to London Heathrow Airport jets off at 9:45 pm and lands at 11:35 am.

Expert advice for your flight from Chicago to Heathrow

Good to know

When to book flights from Chicago to Heathrow

Flights from Chicago to Heathrow: the best tips from KAYAK users' own experiences

FAQs for booking Chicago to London flights

What is the cheapest flight from Chicago O'Hare Intl Airport to London Heathrow Airport?

In the last 3 days, the lowest price for a flight from Chicago O'Hare Intl Airport to London Heathrow Airport was C$ 518 for a one-way ticket and C$ 771 for a round-trip.

Which airlines offer Wi-Fi service onboard planes from Chicago to London?

All the following airlines offer inflight Wi-Fi service on the Chicago to London flight route: British Airways, Iberia, Finnair, American Airlines, Alaska Airlines, SWISS, and United Airlines.

Which aircraft models fly most regularly from Chicago to London?

The Boeing 787-9 Dreamliner is the aircraft model that flies most regularly on the Chicago to London flight route.

Which airline alliances offer flights from Chicago to London?

oneworld is the only airline alliance operating flights between Chicago and London.

On which days can I fly direct from Chicago to London?

There are direct flights from Chicago to London on a daily basis.

How does KAYAK find such low prices on flights from Chicago to London?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to London.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago to London?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Chicago is likely to change within 7 days, so travellers know whether to wait or book now.

What is the Hacker Fare option on flights from Chicago to London?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Chicago with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to London?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Chicago O'Hare Intl Airport to London Heathrow Airport

Prefer to fly direct from Chicago to London?

Reviews of the top airline flying from Chicago to Heathrow

Everything you need to know for your flight from Chicago to Heathrow

Information on your arrival and departure airports

Cabin class types available on flights to Heathrow

Complete your trip to Heathrow with a hotel stay or car rental

Find direct flights to and from Chicago and Heathrow

Flights to other popular destinations

Flights from domestic origins to Chicago

Choose which airport to fly into in Chicago