Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from London to Chicago
Cheap return flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
Lufthansa flights from London to Chicago
Our best Lufthansa deals on London to Chicago flight tickets
United Airlines flights from London to Chicago
Our best United Airlines deals on London to Chicago flight tickets
See travel insights to Chicago from
How to get the cheapest flight ticket from London to Chicago
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Chicago?
The cheapest month to fly to Chicago from London is in February. Flight prices, which tend to average around €503, are often lower during this time because this is during the off-season. If you don’t want to visit Chicago in February, then you should wait until March to fly from London, when ticket prices are also cheap, with an average price of €537.
What is the cheapest day to depart on your flight to Chicago?
On average, the least expensive day to fly to Chicago from London is on a Monday. momondo users have found tickets for Monday departures for as low as €0. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to Chicago on Thursday is €674.
What is the cheapest time of day to depart on your flight to Chicago?
At midday is the cheapest time of day to fly from London to Chicago when you can find flight prices for as low as €0. Flying to Chicago at midday is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are €648 on average. Flights to Chicago from London in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.
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?
You are more likely to see cheaper flights to Chicago from London when booking 13 weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around €643 when searching 13 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from London for as low as €609 on momondo.
What cabin class options are available on London to Chicago flights?
There are 1 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 many flights depart from London to Chicago on average per day?
49 flights are operational daily from London to Chicago as of April 2025. The most popular departure time for this route is 14:00, with 52% of flights per day taking off in the afternoon.
How many flights depart from London to Chicago on average per week?
As of April 2025, 349 flights take off from London and land in Chicago each week. The most common flight departure day for this route is Sat, with 15% of weekly flights taking off on this day.
When to book flights from London to Chicago
Cheap London to Chicago (LON to CHI) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London to Chicago
How far is London to Chicago by plane?
A flight from London to Chicago will travel around 6349.2 km. By plane, this route typically takes 8h 25m.
When did momondo last update prices for flights from London to Chicago?
Prices for flights from London to Chicago were last updated today.
How old do you have to be to fly from London to Chicago?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Chicago.
What documentation or ID do you need to fly to Chicago?
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 licence 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.
What is the most popular plane model from London to Chicago?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London to Chicago is Boeing 767-300 (29.52% of total bookings). The next most popular plane models are Boeing 787-10 Dreamliner (21.94%), Boeing 777 (18.84%), and Boeing 777-300ER (6.75%).
Why use momondo?
Why should I use momondo to find a flight deal from London to Chicago?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Chicago for you.
Can I find flights from London to Chicago with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for London to Chicago flights to just show those with flexible booking policies.
How can momondo help me find flights from London to Chicago?
momondo provides multiple filters to help you find the best flight to Chicago from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from London to Chicago right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of London to Chicago flights. All you need is a valid email address and we will do the rest; it is that quick and easy.