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

Prices are currently low for flights on this route. Typical prices usually range from £402 to £518. The lowest price recently found on this route was £384.

Question 1

What is the cheapest London Heathrow to Chicago flight route?

Accepted Answer

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

Question 2

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

Accepted Answer

The number of flights available between London Heathrow Airport and Chicago is 36 per day as of January 2026. The most frequent departure time is 12:00, with 65% of daily flights leaving in the afternoon.

Question 3

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

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from £402 to £518.
The lowest price recently found on this route was £384.

Question 4

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

Accepted Answer

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 11h 32m.

Question 5

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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around £528 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 Heathrow Airport for as low as £505 on momondo.

Question 6

What is the cheapest month to fly to Chicago?

Accepted Answer

The cheapest month to fly to Chicago from London Heathrow Airport is in February. Flight prices, which tend to average around £426, 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 Heathrow Airport during September instead. Flights to Chicago in September, while not as cheap as those in February, still average around £433.

Question 7

Can stopping save me money on London Heathrow Airport to Chicago flights?

Accepted Answer

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Chicago.

Question 8

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

Accepted Answer

Delta, Icelandair, and Finnair are the most popular carriers operating from London Heathrow to Chicago

Question 9

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

Accepted Answer

Saturday 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 10

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 11

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

Accepted Answer

Frankfurt am Main (FRA) has the shortest average stopover time for this route: 1h 15m.

Question 12

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

Accepted Answer

The number of flights available between London Heathrow Airport and Chicago is 252 per week as of January 2026. The most frequent departure day is Tue, with 17% of weekly flights leaving on this day.

Question 13

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

Accepted Answer

Flights via Reykjavik (KEF) offer the lowest average return price of £399.

Question 14

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 £603. 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 £646.

Question 15

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 16

How have London Heathrow Airport to Chicago flight prices changed over time?

Accepted Answer

As of January 2026, prices for London Heathrow Airport to Chicago flights are approximately 0% more expensive when compared to flights at the same time last year.

Question 17

Which airlines fly to Chicago?

Accepted Answer

British Airways, Lufthansa and Aer Lingus are the top three most popular airlines that fly to Chicago from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 68% 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 18

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 19

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

Accepted Answer

Dublin (DUB) was the most common stop: 38% of momondo users choosing one-stop flights on this route connected there.

Question 20

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

Accepted Answer

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

Question 21

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

Accepted Answer

Flying to Chicago from London Heathrow Airport at midday is the least expensive time of day to depart. momondo users have found prices as low as £620 when looking at flights departing at midday. Flights in the afternoon are often more expensive, with an average ticket price of £653.

Question 22

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

Accepted Answer

Prices for flights from London Heathrow Airport to Chicago are updated daily.

Question 23

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

Accepted Answer

There are 14 operators available for flights from London Heathrow Airport to Chicago as of January 2026.

Question 24

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

Accepted Answer

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Chicago.

Question 25

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

Accepted Answer

The necessary travel and health documents for your Chicago trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best price found	£441
Fastest flight time	8h 40m
Direct flights	Every day
Airports in Chicago	3 airports

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom £327	Free Cancellation	Rating 7.1 603 reviews	Search Icelandair flights
Virgin Atlantic	PriceFrom £337	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
Scandinavian Airlines	PriceFrom £351	Free Cancellation	Rating 7.3 1,672 reviews	Search Scandinavian Airlines flights
Aer Lingus	PriceFrom £358	Free Cancellation	Rating 7.2 1,442 reviews	Search Aer Lingus flights
TAP AIR PORTUGAL	PriceFrom £377	Free Cancellation	Rating 7.1 2,130 reviews	Search TAP AIR PORTUGAL flights
Brussels Airlines	PriceFrom £377	Free Cancellation	Rating 7.2 381 reviews	Search Brussels Airlines flights
Lufthansa	PriceFrom £386	Free Cancellation	Rating 6.8 7,749 reviews	Search Lufthansa flights
Austrian Airlines	PriceFrom £391	Free Cancellation	Rating 7.5 895 reviews	Search Austrian Airlines flights
British Airways	PriceFrom £393	Free Cancellation	Rating 6.7 7,704 reviews	Search British Airways flights
United Airlines	PriceFrom £399	Free Cancellation	Rating 7.4 9,213 reviews	Search United Airlines flights

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