Cheap flights from London Heathrow Airport to Chicago from $334
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 5/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize 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 Heathrow Airport to Chicago
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Lufthansa flights from London Heathrow Airport to Chicago
Our best Lufthansa deals on London Heathrow Airport to Chicago flight tickets
SWISS flights from London Heathrow Airport to Chicago
Our best SWISS deals on London Heathrow Airport to Chicago flight tickets
See travel insights to Chicago from
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 $609.
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 Wednesday when prices can be found for as low as $812. 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 $952.
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 $956.
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 $740 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 $701 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.
What is the cheapest airline that flies from London Heathrow to Chicago?
TAP AIR PORTUGAL, WestJet, and Icelandair 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 45% 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 50 per day as of April 2025. The most frequent departure time is 2:00PM, with 52% 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 351 per week as of April 2025. The most frequent departure day is Mon, with 16% 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 April 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 29.52% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 21.94%, Boeing 777 at 18.84%, and Boeing 777-300ER at 6.75%.
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 17%, Aer Lingus at 17%, 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 7.0 484 reviews | |||
| PriceFrom $462 | Free Cancellation | Rating 7.3 1,344 reviews | |||
| PriceFrom $483 | Free Cancellation | Rating 7.1 1,845 reviews | |||
| PriceFrom $551 | Free Cancellation | Rating 6.6 6,806 reviews | |||
| PriceFrom $562 | Free Cancellation | Rating 7.4 8,685 reviews | |||
| PriceFrom $574 | Free Cancellation | Rating 7.0 1,068 reviews | |||
| PriceFrom $582 | Free Cancellation | Rating 7.0 2,682 reviews | |||
| PriceFrom $583 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $613 | Free Cancellation | Rating 7.6 1,272 reviews | |||
| PriceFrom $660 | Free Cancellation | Rating 6.7 7,027 reviews |
Finnair Flights From London Heathrow Airport to Chicago
Finnair flight deals from London Heathrow Airport to Chicago start from $613 round-trip. Over the 33 Finnair flights for this route in a normal week, average airfare is usually $852 round-trip - but some users have found much cheaper deals with momondo.
Austrian Airlines Flights From London Heathrow Airport to Chicago
Another popular option for London Heathrow Airport to Chicago flights is Austrian Airlines (7.5/10, 780 ratings). Austrian Airlines flies from London Heathrow Airport to Chicago around 21 times per week, with deals starting from $663 round-trip and rising to an average price of around $1,161.
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.