Question 1

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

Accepted Answer

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 08m.

Question 2

How have London to Chicago flight prices changed over time?

Accepted Answer

As of February 2026, prices for London to Chicago flights are approximately 24% more expensive when compared to flights at the same time last year.

Question 3

Which airlines fly to Chicago?

Accepted Answer

British Airways, Lufthansa and Icelandair are the top three most popular airlines that fly to Chicago from London according to our data. British Airways is the first choice among our users, with 67% of people opting to fly with this airline when travelling to Chicago. Keep in mind that there are 14 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.

Question 4

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

Accepted Answer

SWISS, United Airlines, and British Airways are the most popular carriers operating from London to Chicago

Question 5

What is the cheapest London to Chicago flight route?

Accepted Answer

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

Question 6

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

Accepted Answer

The number of flights available between London and Chicago is 238 per week as of February 2026. The most frequent departure day is Sat, with 19% of weekly flights leaving on this day.

Question 7

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

Accepted Answer

Reykjavik (KEF) was the most common stop: 41% of momondo users choosing one-stop flights on this route connected there.

Question 8

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

Accepted Answer

You are more likely to see cheaper flights to Chicago from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around £530 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from London for as low as £506 on momondo.

Question 9

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

Accepted Answer

The cheapest day to depart on your flight to Chicago is on a Wednesday when prices can be found for as low as £608. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Chicago is Saturday, with ticket prices averaging around £647.

Question 10

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

Accepted Answer

Generally, flights departing at night tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

Question 11

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

Accepted Answer

Flights via Reykjavik (KEF) offer the lowest average return price of £352.

Question 12

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

Accepted Answer

Flying to Chicago from London at midday is the least expensive time of day to depart. momondo users have found prices as low as £622 when looking at flights departing at midday. Flights in the afternoon are often more expensive, with an average ticket price of £657.

Question 13

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

Accepted Answer

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

Question 14

How often are flights from London to Chicago delayed?

Accepted Answer

Historically, on average around 11% of flights between London and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 170 minutes.

Question 15

What is the cheapest month to fly to Chicago?

Accepted Answer

The cheapest month to fly to Chicago from London is in February. Flight prices, which tend to average around £422, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Chicago from London during November instead. Flights to Chicago in November, while not as cheap as those in February, still average around £424.

Question 16

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

Accepted Answer

According to our data, United Airlines have had the fewest delays on this route over the last 12 months, with about 5% of their flights experiencing any sort of delay.

Question 17

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

Accepted Answer

Thursday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

Question 18

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

Accepted Answer

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 10h 50m.

Question 19

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

Accepted Answer

As of February 2026, 34 flights take off from London and land in Chicago each day. The most common flight departure time for this route is 11:00, with 58% of daily flights taking off in the afternoon.

Question 20

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

Accepted Answer

Most flights from London to Chicago depart from London Heathrow Airport (LHR) and London Luton Airport (LTN), or London City Airport (LCY). If you want to travel to and from London Heathrow Airport (LHR), you can use a bus, the Tube, a Taxi, or a train. The Heathrow Express is the fastest link between the airport and central London. The train runs nonstop from Paddington station every quarter-hour, taking 15 minutes to get to T2 and T3 and a little longer toT4 or T5. The Tube is another great option since it serves all terminals in the airport and a trip takes about 1 hour. The National Express Coaches operate 24/7 from the airport to Victoria Coach Station and vice versa, and the journey takes approximately 40-80 minutes. Taxis at London Heathrow Airport (LHR) are always available outside each terminal building, with the journey taking approximately 1 hour. For those travelling outside London, take a bus, train, or hire a car. Chicago is served by two airports - Chicago O'HareIntl (ORD), Chicago Midway (MDW), and Chicago Greater Rockford (RFD). Chicago O'HareIntl (ORD) is the busiest airport in Chicago. The CTA Blue Line L train, located in T3, is the best way to travel to and from central Chicago. The trip takes 40 minutes, and the trains operate every 6 -10 minutes throughout the day and every 30min at night. Shuttle vans depart from the airport every 10-15 minutes servicing several hotels in downtown Chicago.

Which cities can you get to from Chicago?

Flights from London to Chicago land at Chicago O'Hare International (ORD). Some nearby cities and towns that are quick to get to include Naperville, Stickney, and Evanston. The most economical way to get to Naperville from Chicago is by car, which takes 36 minutes. You can also take a train from Chicago Union Station and get to Naperville 1h 2min later. Travelling to Stickney via taxi takes 15 minutes and 1 hour if you take a bus. Evanston is about 17 minutes from Chicago by taxi and 44 minutes by train.

Question 21

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

Accepted Answer

Passengers flying from London to Chicago mostly use London Heathrow Airport (LHR). Get some delicious food, drinks, and other refreshments from the numerous restaurants, cafes, lounges, and bars within the airport. London Gatwick Airport (LGW) is the most accessible, with a great budget, easy navigation, and shorter waiting times. While London Heathrow Airport (LHR) is the better option for those coming from central London, it's more expensive when compared to the others. Nonetheless, all London airports provide everything you need to travel anywhere in London. London Heathrow Airport has the advantage of being close to Park Grand Heathrow, an 11min walk from Hounslow East Tube Station. The hotel is a prime choice for many business travellers due to its fully-equipped business facilities and hospitable rooms. Once you land at Chicago O'Hare International Airport, enjoy some relaxation time after a long flight. The airport also offers a children's play area, charging ports, stroller parking, and a nursing room for mothers.

Question 22

Which airlines fly direct from London to Chicago?

Accepted Answer

Travellers fly from London Heathrow Airport (LHR) to Chicago O'Hare International Airport (ORD) in approximately 8h 50min. Direct flights operate from London to Chicago on Monday and Wednesday via Finnair and American Airlines. Brussels Airlines, Air Canada, and British Airways are the most popular carriers operating from London to Chicago. TAP Air Portugal offers the cheapest flights, while Lufthansa, Finnair, and Air France offer the quickest one-way flights from London to Chicago. Get the cheapest flights from London to Chicago by booking your flight 60 days to departure. Some of the carriers that may not claim cancellation charges are United Airlines, British Airways, and Finnair.

Question 23

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

Accepted Answer

Prices for flights from London to Chicago refresh daily.

Question 24

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

Accepted Answer

There are 14 operators available for flights from London to Chicago as of February 2026.

Question 25

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

Accepted Answer

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Chicago.

Question 26

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

Accepted Answer

The required travel and health documents for your Chicago trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Chicago. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best price found	£415
Fastest flight time	8h 40m
Direct flights	Every day
Airports in Chicago	3 airports

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom £332	Free Cancellation	Rating 7.1 606 reviews	Search Icelandair flights
Virgin Atlantic	PriceFrom £338	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
Scandinavian Airlines	PriceFrom £352	Free Cancellation	Rating 7.3 1,676 reviews	Search Scandinavian Airlines flights
Aer Lingus	PriceFrom £357	Free Cancellation	Rating 7.2 1,444 reviews	Search Aer Lingus flights
TAP AIR PORTUGAL	PriceFrom £375	Free Cancellation	Rating 7.1 2,132 reviews	Search TAP AIR PORTUGAL flights
Brussels Airlines	PriceFrom £378	Free Cancellation	Rating 7.2 381 reviews	Search Brussels Airlines flights
Lufthansa	PriceFrom £387	Free Cancellation	Rating 6.8 7,758 reviews	Search Lufthansa flights
Austrian Airlines	PriceFrom £393	Free Cancellation	Rating 7.5 896 reviews	Search Austrian Airlines flights
British Airways	PriceFrom £394	Free Cancellation	Rating 6.7 7,709 reviews	Search British Airways flights
United Airlines	PriceFrom £401	Free Cancellation	Rating 7.4 9,229 reviews	Search United Airlines flights

Cheap flights from London to Chicago from £345

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Chicago departing on 18/3. 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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How to get the cheapest flight ticket from London to Chicago

What is the cheapest month to fly to Chicago?

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

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

Flying to Chicago from London at midday is the least expensive time of day to depart. momondo users have found prices as low as £622 when looking at flights departing at midday. Flights in the afternoon are often more expensive, with an average ticket price of £657.

What is the cheapest London to Chicago flight route?

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

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

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

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

How have London to Chicago flight prices changed over time?

As of February 2026, prices for London to Chicago flights are approximately 24% more expensive when compared to flights at the same time last year.

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

SWISS, United Airlines, and British Airways are the most popular carriers operating from London to Chicago

Which airlines fly to Chicago?

How often are flights from London to Chicago delayed?

Historically, on average around 11% of flights between London and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 170 minutes.

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

Generally, flights departing at night tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

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

Thursday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

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

According to our data, United Airlines have had the fewest delays on this route over the last 12 months, with about 5% of their flights experiencing any sort of delay.

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

Reykjavik (KEF) was the most common stop: 41% of momondo users choosing one-stop flights on this route connected there.

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

Flights via Reykjavik (KEF) offer the lowest average return price of £352.

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

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 10h 50m.

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

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 08m.

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

As of February 2026, 34 flights take off from London and land in Chicago each day. The most common flight departure time for this route is 11:00, with 58% of daily flights taking off in the afternoon.

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

The number of flights available between London and Chicago is 238 per week as of February 2026. The most frequent departure day is Sat, with 19% of weekly flights leaving on this day.

When to book flights from London to Chicago

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

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How far is London to Chicago by plane?

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

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

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

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

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What is the most popular airline from London to Chicago?

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Why use momondo?

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I’m not ready to book a flight from London to Chicago right now. Can momondo alert me if prices change?