Question 1

Which airlines fly to Chicago O'Hare Intl Airport?

Accepted Answer

British Airways, Lufthansa and Icelandair are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from London 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 O'Hare Intl Airport. Keep in mind that there are 14 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

Question 2

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 172 minutes.

Question 3

Which airport is the most popular for stopovers for flights between London and Chicago O'Hare Intl Airport?

Accepted Answer

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

Question 4

How many flights depart from London to Chicago O'Hare Intl Airport on average per day?

Accepted Answer

The number of flights available between London and Chicago O'Hare Intl Airport is 38 per day as of December 2025. The most frequent departure time is 12:00, with 63% of daily flights leaving in the afternoon.

Question 5

Can stopping save me money on London to Chicago O'Hare Intl Airport flights?

Accepted Answer

You could potentially save up to 7% on your flight if you consider stops on a London to Chicago O'Hare Intl Airport flight.

Question 6

What is the cheapest London to Chicago O'Hare Intl flight route?

Accepted Answer

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

Question 7

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 8

Which stopover airport has the shortest connection time from London to Chicago O'Hare Intl Airport?

Accepted Answer

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 03m.

Question 9

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

Accepted Answer

The cheapest day to depart from London to Chicago O'Hare Intl Airport is on a Wednesday. Travellers who choose to depart for Chicago O'Hare Intl Airport on a Wednesday will often find tickets for as low as £611. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Chicago O'Hare Intl Airport on Saturday is £657.

Question 10

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Accepted Answer

The cheapest time of day to fly to Chicago O'Hare Intl Airport is at midday when flights can be purchased for as low as £628. In contrast, the most expensive time of day to depart to Chicago O'Hare Intl Airport is in the afternoon when prices are around £656.

Question 11

How have London to Chicago O'Hare Intl Airport flight prices changed over time?

Accepted Answer

As of December 2025, prices for London to Chicago O'Hare Intl Airport flights are approximately 20% more expensive when compared to flights at the same time last year.

Question 12

Which stopover airport has the shortest travel time from London to Chicago O'Hare Intl Airport?

Accepted Answer

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 11h 15m.

Question 13

What cabin class options are available on London to Chicago O'Hare Intl flights?

Accepted Answer

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

Question 14

What is the cheapest airline that flies from London to Chicago O'Hare Intl?

Accepted Answer

JetBlue, Icelandair, and Lufthansa are the most popular carriers operating from London to Chicago O'Hare Intl

Question 15

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 16

Which stopover airport offers the lowest fares from London to Chicago O'Hare Intl Airport?

Accepted Answer

Flights via Zurich (ZRH) offer the lowest average return price of £423.

Question 17

What is the typical price of a round-trip flight between London and Chicago O'Hare Intl Airport?

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from £459 to £740.
The lowest price recently found on this route was £405.

Question 18

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

Accepted Answer

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around £538 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from London for as low as £516 on momondo.

Question 19

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

Accepted Answer

The cheapest month to fly to Chicago O'Hare Intl Airport from London is in February. Flight prices, which tend to average around £435, 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 O'Hare Intl Airport from London during September instead. Flights to Chicago O'Hare Intl Airport in September, while not as cheap as those in February, still average around £441.

Question 20

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 21

How many flights depart from London to Chicago O'Hare Intl Airport on average per week?

Accepted Answer

The number of flights available between London and Chicago O'Hare Intl Airport is 270 per week as of December 2025. The most frequent departure day is Tue, with 16% of weekly flights leaving on this day.

Question 22

When did momondo last update prices for flights from London to Chicago O'Hare Intl Airport?

Accepted Answer

Prices for flights from London to Chicago O'Hare Intl Airport are refreshed on a daily basis.

Question 23

How many operators does momondo search for flights from London to Chicago O'Hare Intl Airport?

Accepted Answer

As of December 2025, there are 14 operators available to choose from for flights from London to Chicago O'Hare Intl Airport.

Question 24

How old do you have to be to fly from London to Chicago O'Hare Intl Airport?

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 to Chicago O'Hare Intl Airport.

Question 25

What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

Accepted Answer

The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best price found	£438
Fastest flight time	8h 40m
Direct flights	Every day

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom £312	Free Cancellation	Rating 7.1 593 reviews	Search Icelandair flights
Virgin Atlantic	PriceFrom £343	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
Scandinavian Airlines	PriceFrom £354	Free Cancellation	Rating 7.4 1,627 reviews	Search Scandinavian Airlines flights
Aer Lingus	PriceFrom £364	Free Cancellation	Rating 7.2 1,416 reviews	Search Aer Lingus flights
TAP AIR PORTUGAL	PriceFrom £384	Free Cancellation	Rating 7.1 2,101 reviews	Search TAP AIR PORTUGAL flights
Brussels Airlines	PriceFrom £384	Free Cancellation	Rating 7.2 377 reviews	Search Brussels Airlines flights
Lufthansa	PriceFrom £393	Free Cancellation	Rating 6.8 7,669 reviews	Search Lufthansa flights
British Airways	PriceFrom £401	Free Cancellation	Rating 6.7 7,630 reviews	Search British Airways flights
Austrian Airlines	PriceFrom £402	Free Cancellation	Rating 7.5 886 reviews	Search Austrian Airlines flights
United Airlines	PriceFrom £407	Free Cancellation	Rating 7.4 9,124 reviews	Search United Airlines flights

Cheap flights from London to Chicago from £378

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 23/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from London to Chicago

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

Cheap direct flights

United Airlines flights from London to Chicago O'Hare Intl Airport

Our best United Airlines deals on London to Chicago O'Hare Intl Airport flight tickets

Austrian Airlines flights from London to Chicago O'Hare Intl Airport

Our best Austrian Airlines deals on London to Chicago O'Hare Intl Airport flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from London to Chicago O'Hare Intl Airport that are best for you.

See travel insights to Chicago from

How to get the cheapest flight ticket from London to Chicago O'Hare Intl Airport