Question 1

How long does a flight from Chicago to London take?

Accepted Answer

Direct flights take on average 7h 35m 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 9 nonstop flights that take off from Chicago O'Hare Intl Airport and land in London Heathrow Airport, with an average flight time of 8h 00m. The most common departure time is 4:00 p.m. and most flights take off in the evening. Each week, there are 63 flights and there are the same amount of flights each day (9). Visit our flight page for the latest deals!>/a>

Question 3

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$ 233 for a one-way ticket and C$ 453 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 4

Which airlines fly most frequently between Chicago and London?

Accepted Answer

American Airlines connects Chicago to London with 21 flights per week and both British Airways and United Airlines also offer 21 flights per week. Visit our flight page for the latest deals!>/a>

Question 5

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

Accepted Answer

For Chicago to London, Sunday 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 Thursday, with Wednesday being the most expensive. Visit our flight page for the latest deals!>/a>

Question 6

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 4:05 pm and will be landing in London Heathrow Airport at 6:20 am.

Question 7

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 10:30 pm and lands at 12:15 pm.

Question 8

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

Accepted Answer

Iberia, British Airways, Finnair, American Airlines, and Alaska Airlines offer inflight Wi-Fi service on the Chicago to London flight route.

Question 9

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 10

Which airline alliances offer flights from Chicago to London?

Accepted Answer

oneworld, and Star Alliance are the airline alliances operating flights between Chicago and London, with oneworld being the most commonly used for this route.

Question 11

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 12

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 October, where tickets cost C$ 927 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is C$ 1,500 and C$ 1,379 respectively.

Question 13

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 14

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 15

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 16

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 17

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 18

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$ 627) and Icelandair (C$ 767).

Question 19

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 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Question 20

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$ 2,146 on average.

Low season	February
High season	August
Cheapest flight	C$ 323

ORD - LHR

C$ 323 Find Cheap Flights from Chicago to London

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

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Expert advice for your flight from Chicago to Heathrow

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.

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

For Chicago to London, Sunday 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 Thursday, with Wednesday 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 October, where tickets cost C$ 927 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is C$ 1,500 and C$ 1,379 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$ 2,146 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 3 weeks 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$ 627) and Icelandair (C$ 767).

Which airlines fly most frequently between Chicago and London?

American Airlines connects Chicago to London with 21 flights per week and both British Airways and United Airlines also offer 21 flights per week.

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 35m 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 4:05 pm and will be landing in London Heathrow Airport at 6:20 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 10:30 pm and lands at 12:15 pm.

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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$ 233 for a one-way ticket and C$ 453 for a round-trip.

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

Iberia, British Airways, Finnair, American Airlines, and Alaska Airlines offer inflight Wi-Fi service on the Chicago to London flight route.

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, and Star Alliance are the airline alliances operating flights between Chicago and London, with oneworld being the most commonly used for this route.

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?

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

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Cabin class types available on flights to Heathrow

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

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