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Not ready to book? to track prices.Find the cheapest flights from London Heathrow Airport to Chicago
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TAP AIR PORTUGAL flights from London Heathrow Airport to Chicago
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Scandinavian Airlines flights from London Heathrow Airport to Chicago
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How to get the cheapest flight ticket from London Heathrow Airport 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?
If you don’t want to visit Chicago in February, then you should wait until March to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $928.
What is the cheapest day to depart on your flight to Chicago?
Our data shows that Wednesday is the least expensive day to fly to Chicago. Tickets to fly out on this day can be as low as $1,138. Flights from London Heathrow Airport to Chicago on a Saturday will generally be more expensive and average around $1,571. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Chicago?
Our data shows that the cheapest London Heathrow Airport to Chicago flights are usually those with departure times at midday. Our users have found flights to Chicago at midday for as low as $990. Flights in the morning are often more expensive, with an average ticket price of $1,186.
What is the cheapest London Heathrow to Chicago flight route?
Fly from London Heathrow to Chicago O'Hare Intl for the best London Heathrow - 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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $1,133 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 $1,076 on momondo.
What cabin class options are available on London Heathrow to Chicago flights?
There are 2 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.
Can stopping save me money on London Heathrow Airport to Chicago flights?
You could potentially save up to 50% on your flight if you consider stops on a London Heathrow Airport to Chicago flight.
How have London Heathrow Airport to Chicago flight prices changed over time?
As of July 2025, prices for London Heathrow Airport to Chicago flights are approximately 9% more expensive when compared to flights at the same time last year.
How many flights depart from London Heathrow Airport to Chicago on average per day?
As of July 2025, there are 51 flights per day flying from London Heathrow Airport to Chicago. The most common time of day flights depart is 14:00, with 54% of flights taking off in the afternoon.
How many flights depart from London Heathrow Airport to Chicago on average per week?
The number of flights available between London Heathrow Airport and Chicago is 360 per week as of July 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.
When to book flights from London Heathrow Airport to Chicago
Cheap London Heathrow Airport to Chicago (LHR to CHI) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Chicago
How far is London Heathrow to Chicago by plane?
A flight from London Heathrow to Chicago will travel around 6330.3 km. Flights usually cover this in 8h 55m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London Heathrow Airport to Chicago?
Prices for flights from London Heathrow Airport to Chicago are updated daily.
How old do you have to be to fly from London Heathrow Airport to Chicago?
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 stopovers 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 London Heathrow Airport to Chicago.
What documentation or ID do you need to fly to Chicago?
The required travel and health documents for your Chicago trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Chicago. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London Heathrow Airport to Chicago?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from London Heathrow Airport to Chicago is Boeing 767-300 (44.21% of total bookings). The next most popular plane models are Boeing 787-10 Dreamliner (18.33%), Boeing 777 (15.26%), and Boeing 777-300ER (6.05%).
Why use momondo?
Why should I use momondo to find a flight deal from London to Chicago?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Chicago. momondo saves you time and could save you money on your trip.
Can I find flights from London to Chicago with flexible booking policies on momondo?
All flight searches from London to Chicago on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from London to Chicago?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Chicago.
I’m not ready to book a flight from London to Chicago right now. Can momondo alert me if prices change?
Price alerts on flights to Chicago from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.