Question 1

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 $795 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Chicago for as low as $707 on momondo.

Question 2

Can stopping save me money on Chicago to London flights?

Accepted Answer

You could potentially save up to 46% on your flight if you consider stops on a Chicago to London flight.

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

Flights via Zurich (ZRH) offer the lowest average round-trip price of $508.

Question 5

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

Accepted Answer

Reykjavik (KEF) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

Question 6

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

Accepted Answer

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 9h 53m.

Question 7

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

Accepted Answer

As of July 2025, there are 56 flights per day flying from Chicago to London. The most common time of day flights depart is 9:00PM, with 65% of flights taking off in the evening.

Question 8

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 $648, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Chicago averaging around $666.

Question 9

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

Accepted Answer

Flying to London from Chicago in the morning is the least expensive time of day to depart. momondo users have found prices as low as $685 when looking at flights departing in the morning. Flights to London are more costly in the afternoon, with an average ticket price of $824. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Question 10

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

Accepted Answer

394 flights are operational weekly from Chicago to London as of July 2025. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.

Question 11

What airlines fly to London?

Accepted Answer

British Airways, Iberia and American Airlines 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 traveling to London. Keep in mind that there are 17 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Question 12

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 $642 to $906.
The lowest price recently found on this route was $423.

Question 13

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 14

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

Accepted Answer

The cheapest day to depart from Chicago to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $764. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $893. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Question 15

How have Chicago to London flight prices changed over time?

Accepted Answer

As of July 2025, prices for Chicago to London flights are approximately 34% cheaper when compared to flights at the same time last year.

Question 16

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

Accepted Answer

Brussels (BRU) has the shortest average layover time for this route: 1h 08m.

Question 17

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 18

Which airlines fly direct from Chicago to London?

Accepted Answer

For travelers making trips on flights from Chicago to London, some of the airlines offering nonstop flights include Finnair, Brussels Airlines, Lufthansa, United Airlines, Alaska Airlines, and British Airways. Beyond these nonstop flight choices, some of the one-stop Chicago to London flight options include a flight on TAP Air Portugal with a stop at Lisbon Humberto Delgado (LIS), a one-stop flight on Swiss Airlines with a layover at Zurich (ZRH), and a one-stop flight on Turkish Airlines with a layover at Istanbul (IST). KLM also offers a one-stop, one-way flight from Chicago to London that has a layover at John F. Kennedy International Airport (JFK) and British Airways offers a one-stop flight that has a layover at Charlotte Douglas (CLT). Finally, you can find a one-stop flight on Iberia with a layover at Madrid Barajas (MAD) and American Airlines offers a one-stop flight with a layover at Charlotte Douglas.

Question 19

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

Accepted Answer

The two major airports in the Chicago area that operate flights from Chicago to London are Chicago O' Hare International Airport (ORD) and Chicago Midway (MDW). If you are traveling from downtown Chicago to Chicago O' Hare International Airport, a quick and convenient choice is to travel on the Chicago Transit Authority Blue Line light rail train that offers service from downtown Chicago right to the airport. The Chicago Transit Authority offers a similar service from downtown Chicago to Chicago Midway Airport on their Orange Line light-rail train. If your flight from Chicago to London will be arriving at London Heathrow Airport (LHR), a quick and convenient choice is to take the Heathrow Express light-rail train. If your flight will be arriving at the London City Airport (LCY), a good choice for transportation to the center of London is on the Dockland Light Railway DLR Line.

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

While many travelers will utilize London Heathrow Airport to travel to the center of London, there are also quite a few cities and towns west of London that make traveling to London Heathrow Airport a good choice for travelers. Some of the towns and cities include Farnborough, Basingstoke, Newbury, Reading, and Guildford.

Question 20

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

Accepted Answer

Since there are quite a few flights from Chicago to London from both major Chicago airports to the London area, your choice for which airport to utilize comes down to which one will be more convenient for you depending on your departure point within the Chicago area. Chicago O' Hare International Airport is located to the northwest of the center of Chicago and is a good option for those coming from the north side of the city and are traveling on cheap flights from Chicago to London. Chicago Midway Airport is located southwest of the city and makes a good choice for those that are coming from the south side of the city. If you are coming from downtown Chicago, both airports are equally convenient especially due to the ample public transportation available from downtown Chicago. When traveling internationally from Chicago to London, you will find that there is quite a bit more choice in terms of flights to London Heathrow Airport as opposed to London City Airport. That said, if you are going to be staying somewhere on the east side of London or anywhere east of the city of London, the London City Airport is going to be far more convenient because London Heathrow Airport is west of London and the trip from this airport to the east side of London can be quite lengthy.

Question 21

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

Accepted Answer

Prices for flights from Chicago to London refresh daily.

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 17 as of July 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 you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best Price Found	$179
Fastest flight time	7h 40m
Direct flights	Every day
Airports in London	5 airports

Airline	Rating	Free Cancellation	Price
JetBlue	PriceFrom $51	Free Cancellation	Rating 7.2 2,914 reviews	Search JetBlue flights
SWISS	PriceFrom $257	Free Cancellation	Rating 7.5 1,686 reviews	Search SWISS flights
Delta	PriceFrom $345	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
Scandinavian Airlines	PriceFrom $358	Free Cancellation	Rating 7.3 1,457 reviews	Search Scandinavian Airlines flights
Lufthansa	PriceFrom $430	Free Cancellation	Rating 6.8 7,275 reviews	Search Lufthansa flights
Icelandair	PriceFrom $470	Free Cancellation	Rating 7.0 520 reviews	Search Icelandair flights
TAP AIR PORTUGAL	PriceFrom $508	Free Cancellation	Rating 7.1 1,933 reviews	Search TAP AIR PORTUGAL flights
Aer Lingus	PriceFrom $552	Free Cancellation	Rating 7.1 1,192 reviews	Search Aer Lingus flights
Finnair	PriceFrom $568	Free Cancellation	Rating 7.6 1,316 reviews	Search Finnair flights
Iberia	PriceFrom $580	Free Cancellation	Rating 7.0 2,859 reviews	Search Iberia flights

Cheap flights from Chicago to London from $179

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 9/8. 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?

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

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 46% 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 July 2025, prices for Chicago to London flights are approximately 34% cheaper when compared to flights at the same time last year.

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

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

What airlines fly to London?

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

Reykjavik (KEF) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Zurich (ZRH) offer the lowest average round-trip price of $508.

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

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 9h 53m.

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

Brussels (BRU) has the shortest average layover time for this route: 1h 08m.

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

As of July 2025, there are 56 flights per day flying from Chicago to London. The most common time of day flights depart is 9:00PM, with 65% of flights taking off in the evening.

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

394 flights are operational weekly from Chicago to London as of July 2025. The most popular departure day for this route is Mon, with 14% of flights per week taking off 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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