Question 1

What is the cheapest day to depart on your flight to London?

Accepted Answer

Our data shows that Thursday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £515. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Chicago to London for around £656.

Question 2

How many flights depart from Chicago to London on average per week?

Accepted Answer

The number of flights available between Chicago and London is 376 per week as of August 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

Question 3

Which stopover airport has the shortest travel time from Chicago to London?

Accepted Answer

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 10h 03m.

Question 4

What is the cheapest month to fly to London?

Accepted Answer

The cheapest month to fly to London from Chicago is in February. Flight prices, which tend to average around £479, are often lower during this time because this is during the off-season. The month of September is another great option to travel to London, with average flight prices from Chicago averaging around £491.

Question 5

Which airlines fly to London?

Accepted Answer

British Airways, Iberia and Finnair are the top three most popular airlines that fly to London from Chicago according to our data. British Airways is the first choice among our users, with 53% of people opting to fly with this airline when travelling to London. Keep in mind that there are 7 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Question 6

Which airport is the most popular for stopovers for flights between Chicago and London?

Accepted Answer

Reykjavik (KEF) was the most common stop: 61% of momondo users choosing one-stop flights on this route connected there.

Question 7

Can stopping save me money on Chicago to London flights?

Accepted Answer

You could potentially save up to 36% on your flight if you consider stops on a Chicago to London flight.

Question 8

Which stopover airport offers the lowest fares from Chicago to London?

Accepted Answer

Flights via Lisbon (LIS) offer the lowest average return price of £449.

Question 9

How many flights depart from Chicago to London on average per day?

Accepted Answer

As of August 2025, there are 53 flights per day flying from Chicago to London. The most common time of day flights depart is 21:00, with 66% of flights taking off in the evening.

Question 10

How far in advance should I book a flight to London?

Accepted Answer

You are more likely to see cheaper flights to London from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £586 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Chicago for as low as £517 on momondo.

Question 11

What is the cheapest time of day to depart on your flight to London?

Accepted Answer

The cheapest time of day to fly to London is in the morning when flights can be purchased for as low as £500. Flights at midday are often more expensive, with an average ticket price of £809.

Question 12

What is the cheapest Chicago to London flight route?

Accepted Answer

Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago - London flight prices

Question 13

What is the cheapest airline that flies from Chicago to London?

Accepted Answer

TAP AIR PORTUGAL and WestJet are the most popular carriers operating from Chicago to London

Question 14

Which stopover airport has the shortest connection time from Chicago to London?

Accepted Answer

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 10m.

Question 15

What cabin class options are available on Chicago to London flights?

Accepted Answer

There are 4 cabin classes available to choose from on Chicago to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Question 16

How have Chicago to London flight prices changed over time?

Accepted Answer

As of August 2025, prices for Chicago to London flights are approximately 28% cheaper when compared to flights at the same time last year.

Question 17

What is the typical price of a round-trip flight between Chicago and London?

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from £455 to £655.
The lowest price recently found on this route was £373.

Question 18

What is the best way to get in and out of airports in Chicago to London?

Accepted Answer

The best way to get to Chicago O’Hare Airport from the city centre is by train or taxi. Most people prefer to take a taxi from the centre of Chicago to the airport because it is the most reliable method. A taxi will get you to the airport in about 30 to 40 minutes depending on traffic in the city. If you prefer to use the train, then you need to take the blue line to get to the airport. Once you arrive in London the best ways to get from London Heathrow Airport, to the centre of London is by train, bus or taxi. The Heathrow Express train is a convenient way to travel between the airport and the city centre, the train reaches Paddington Station in around 15 minutes, and from here you can access the different underground lines, like the Bakerloo Line, Central Line, Hammersmith & City Line and the District Line. The train leaves the airport every 20 minutes.

Which cities can you get to from London Heathrow International Airport?

London is a very popular city for travellers and if you're visiting you will probably want to visit other nearby cities. With London's bus and train systems being incredibly robust you can take a high speed train or a very comfortable bus to any city in the country with relative ease. From London you can get to Brighton in the south of England in just over 1 hour using the train. If you want to visit the north of England, you can reach Leeds by train in just under 2h 30min, or Manchester in either 2 or 3 hours depending on the train. You can also easily visit cities in Scotland and Wales from London, Cardiff for example can be reached by train in less than 2 hours with some trains, or visit Edinburgh, the capital of Scotland, which is easily done by train in around 4 hours.

Question 19

Which airlines fly direct from Chicago to London?

Accepted Answer

If you have been looking for direct flights from Chicago to London there is only one airline provider that offers direct flights and that is American airlines. A direct flight from Chicago to London with American Airlines takes on average 9 hours to complete. There are other airline providers that offer flights from Chicago to London but they always have at least one stop along the way. Some of these providers include Lufthansa, Turkish Airlines and SWISS. The main arrival and departure airport will remain the same regardless of what provider you use. Withthe departure airport being London Heathrow International Airport and the arrival airport being Chicago O’Hare International Airport. If you're looking for cheap flights from Chicago to London, there are usually better deals on flights with one or more stopovers.

Question 20

What are the benefits of the different airports in Chicago to London?

Accepted Answer

Chicago is one of the biggest cities in America, so the airport is well equipped for travellers. Some of the amenities available include waiting areas for travellers, restaurants, bars and shops, which you can access in both the arrival and departure areas of the airport. You can also find charging stations and desk areas to get some work done before your flight or in between connections. London Heathrow Airport is also a major airport and has a multitude of facilities, including on site hotels for passengers who need to rest before their next flight. You can also find restaurants, bars and shops, as well as accessible entrances and a range of accessibility features for elderly travellers and those with disabilities.

Question 21

When did momondo last update prices for flights from Chicago to London?

Accepted Answer

Prices for flights from Chicago to London were last updated today.

Question 22

How many operators does momondo search for flights from Chicago to London?

Accepted Answer

The number of operators available for flights from Chicago to London is 7 as of August 2025.

Question 23

How old do you have to be to fly from Chicago to London?

Accepted Answer

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago to London.

Question 24

What documentation or ID do you need to fly to London?

Accepted Answer

The travel and health documents required for your trip to London can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best price found	£167
Fastest flight time	7h 40m
Direct flights	Every day
Airports in London	5 airports

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom £355	Free Cancellation	Rating 6.8 7,334 reviews	Search Lufthansa flights
Aer Lingus	PriceFrom £408	Free Cancellation	Rating 7.2 1,221 reviews	Search Aer Lingus flights
Finnair	PriceFrom £411	Free Cancellation	Rating 7.6 1,320 reviews	Search Finnair flights
Iberia	PriceFrom £443	Free Cancellation	Rating 7.0 2,885 reviews	Search Iberia flights
British Airways	PriceFrom £456	Free Cancellation	Rating 6.7 7,283 reviews	Search British Airways flights
United Airlines	PriceFrom £458	Free Cancellation	Rating 7.4 8,922 reviews	Search United Airlines flights
American Airlines	PriceFrom £496	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights

Cheap flights from Chicago to London from £167

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to London departing on 28/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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What is the typical price of a round-trip flight between Chicago and London?

What is the cheapest month to fly to London?

What is the cheapest day to depart on your flight to London?

Our data shows that Thursday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £515. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Chicago to London for around £656.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the morning when flights can be purchased for as low as £500. Flights at midday are often more expensive, with an average ticket price of £809.

What is the cheapest Chicago to London flight route?

Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago - London flight prices

How far in advance should I book a flight to London?

What cabin class options are available on Chicago to London flights?

There are 4 cabin classes available to choose from on Chicago to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Chicago to London flights?

You could potentially save up to 36% on your flight if you consider stops on a Chicago to London flight.

How have Chicago to London flight prices changed over time?

As of August 2025, prices for Chicago to London flights are approximately 28% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Chicago to London?

TAP AIR PORTUGAL and WestJet are the most popular carriers operating from Chicago to London

Which airlines fly to London?

Which airport is the most popular for stopovers for flights between Chicago and London?

Reykjavik (KEF) was the most common stop: 61% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport offers the lowest fares from Chicago to London?

Flights via Lisbon (LIS) offer the lowest average return price of £449.

Which stopover airport has the shortest travel time from Chicago to London?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 10h 03m.

Which stopover airport has the shortest connection time from Chicago to London?

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 10m.

How many flights depart from Chicago to London on average per day?

As of August 2025, there are 53 flights per day flying from Chicago to London. The most common time of day flights depart is 21:00, with 66% of flights taking off in the evening.

How many flights depart from Chicago to London on average per week?

The number of flights available between Chicago and London is 376 per week as of August 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.

When to book flights from Chicago to London

Cheap Chicago to London (CHI to LON) flight deals and tips

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When did momondo last update prices for flights from Chicago to London?

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How old do you have to be to fly from Chicago to London?

What documentation or ID do you need to fly to London?

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What is the most popular airline from Chicago to London?

Best airlines flying from Chicago to London

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