Cheap flights from London Heathrow Airport to Chicago from $341
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 Heathrow Airport to Chicago 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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TAP AIR PORTUGAL flights from London Heathrow Airport to Chicago
Our best TAP AIR PORTUGAL deals on London Heathrow Airport to Chicago flight tickets
Scandinavian Airlines flights from London Heathrow Airport to Chicago
Our best Scandinavian Airlines deals on London Heathrow Airport to Chicago flight tickets
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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?
The month of February is, on average, the cheapest month to fly to Chicago from London Heathrow Airport, with most prices found around $599. If you’re not able to fly to Chicago in February, then March is your next best option. Flight prices from London Heathrow Airport to Chicago during March average around $606.
What is the cheapest day to depart on your flight to Chicago?
The cheapest day to depart on your flight to Chicago is on a Friday when prices can be found for as low as $805. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Chicago for around $940.
What is the cheapest time of day to depart on your flight to Chicago?
Our most recent data shows that the best time of day to fly to Chicago is in the evening. Flights from London Heathrow Airport to Chicago during this time can be as low as $653. In contrast, the most expensive time of day to depart to Chicago is in the afternoon when prices are around $953.
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 13 weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $742 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 Heathrow Airport for as low as $710 on momondo.
What cabin class options are available on London Heathrow to Chicago flights?
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.
Can stopping save me money on London Heathrow Airport to Chicago flights?
You could potentially save up to 5% 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 June 2025, prices for London Heathrow Airport to Chicago flights are approximately 15% more expensive when compared to flights at the same time last year.
What is the cheapest airline that flies from London Heathrow to Chicago?
TAP AIR PORTUGAL, Aer Lingus, and British Airways are the most popular carriers operating from London Heathrow to Chicago
What airlines fly to Chicago?
British Airways, American Airlines 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 48% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 11 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.
How many flights depart from London Heathrow Airport to Chicago on average per day?
The number of flights available between London Heathrow Airport and Chicago is 51 per day as of June 2025. The most frequent departure time is 2:00PM, with 53% of daily flights leaving 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 362 per week as of June 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?
There are 3933.5 mi between London Heathrow and Chicago. 8h 25m is a normal flight duration for this route.
When did momondo last update prices for flights from London Heathrow Airport to Chicago?
Prices for flights from London Heathrow Airport to Chicago were last updated today.
How many operators does momondo search for flights from London Heathrow Airport to Chicago?
There are 11 operators available for flights from London Heathrow Airport to Chicago as of June 2025.
How old do you have to be to fly from London Heathrow Airport to Chicago?
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.
What documentation or ID do you need to fly to Chicago?
The travel and health documents you'll need for your trip to Chicago 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from London Heathrow Airport to Chicago?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Chicago is Boeing 767-300, representing 40.03% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 20.47%, Boeing 777 at 15.62%, and Boeing 777-300ER at 7.67%.
What is the most popular airline from London Heathrow Airport to Chicago?
momondo data reveals that the most frequently booked airline on the route from London Heathrow Airport to Chicago is British Airways, representing 27% of all bookings. The subsequent popular airlines are American Airlines at 16%, Aer Lingus at 15%, and Lufthansa at 13%.
Best airlines flying from London Heathrow Airport to Chicago
Compare and see reviews for airlines that fly from London Heathrow Airport to Chicago with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $451 | Free Cancellation | Rating 7.0 499 reviews | |||
| PriceFrom $462 | Free Cancellation | Rating 7.3 1,387 reviews | |||
| PriceFrom $483 | Free Cancellation | Rating 7.1 1,885 reviews | |||
| PriceFrom $538 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $551 | Free Cancellation | Rating 6.6 7,008 reviews | |||
| PriceFrom $568 | Free Cancellation | Rating 7.1 1,117 reviews | |||
| PriceFrom $582 | Free Cancellation | Rating 7.0 2,776 reviews | |||
| PriceFrom $583 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $586 | Free Cancellation | Rating 7.6 802 reviews | |||
| PriceFrom $607 | Free Cancellation | Rating 7.6 1,290 reviews |
Austrian Airlines Flights From London Heathrow Airport to Chicago
Austrian Airlines flight deals from London Heathrow Airport to Chicago start from $586 round-trip. Over the 21 Austrian Airlines flights for this route in a normal week, average airfare is usually $987 round-trip - but some users have found much cheaper deals with momondo.
Finnair Flights From London Heathrow Airport to Chicago
Another popular option for London Heathrow Airport to Chicago flights is Finnair (7.6/10, 1,290 ratings). Finnair flies from London Heathrow Airport to Chicago around 33 times per week, with deals starting from $607 round-trip and rising to an average price of around $809.
Traveling to a place near Chicago?
Book flights to Chicago if you plan to visit one of these locationsWhy 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 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.