Question 1

How have Chicago to London flight prices changed over time?

Accepted Answer

As of December 2025, prices for Chicago to London flights are approximately 12% more expensive when compared to flights at the same time last year.

Question 2

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

Accepted Answer

Our data shows that Sunday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £509. 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 £681.

Question 3

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

Accepted Answer

British Airways, Icelandair, and Austrian Airlines are the most popular carriers operating from Chicago to London

Question 4

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 afternoon when flights can be purchased for as low as £565. Flights at midday are often more expensive, with an average ticket price of £817.

Question 5

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

Accepted Answer

Dublin (DUB) was the most common stop: 60% of momondo users choosing one-stop flights on this route connected there.

Question 6

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 7

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

Accepted Answer

According to our data, United Airlines have had the fewest delays on this route over the last 12 months, with about 23% of their flights experiencing any sort of delay.

Question 8

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

Accepted Answer

The number of flights available between Chicago and London is 289 per week as of December 2025. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.

Question 9

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: 9h 50m.

Question 10

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

Accepted Answer

As of December 2025, there are 41 flights per day flying from Chicago to London. The most common time of day flights depart is 21:00, with 62% of flights taking off in the evening.

Question 11

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 £595 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 £524 on momondo.

Question 12

What is the cheapest month to fly to London?

Accepted Answer

The cheapest month to fly to London from Chicago is in September. Flight prices, which tend to average around £483, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Chicago averaging around £491.

Question 13

How often are flights from Chicago to London delayed?

Accepted Answer

Historically, on average around 25% of flights between Chicago and London have experienced a delay on any given week. The average delay length over the past 12 months has been 168 minutes.

Question 14

Can stopping save me money on Chicago to London flights?

Accepted Answer

You could potentially save up to 16% on your flight if you consider stops on a Chicago to London flight.

Question 15

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 16

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

Accepted Answer

Flights via Lisbon (LIS) offer the lowest average return price of £454.

Question 17

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

Accepted Answer

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

Question 18

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 48% 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 19

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

Accepted Answer

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

Question 20

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

Accepted Answer

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the morning have, in the past, seen delays more frequently in comparison.

Question 21

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 22

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 23

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 24

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 25

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 December 2025.

Question 26

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 27

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	£359
Fastest flight time	7h 40m
Direct flights	Every day
Airports in London	6 airports

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom £359	Free Cancellation	Rating 6.8 7,626 reviews	Search Lufthansa flights
American Airlines	PriceFrom £387	Free Cancellation	Rating 7.2 11,051 reviews	Search American Airlines flights
Finnair	PriceFrom £415	Free Cancellation	Rating 7.6 1,334 reviews	Search Finnair flights
British Airways	PriceFrom £424	Free Cancellation	Rating 6.7 7,571 reviews	Search British Airways flights
Iberia	PriceFrom £448	Free Cancellation	Rating 7.0 3,046 reviews	Search Iberia flights
Aer Lingus	PriceFrom £451	Free Cancellation	Rating 7.2 1,394 reviews	Search Aer Lingus flights
United Airlines	PriceFrom £463	Free Cancellation	Rating 7.4 9,096 reviews	Search United Airlines flights

Cheap flights from Chicago to London from £284

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 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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