Cheap flights from London to Chicago from $270
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 8/25. 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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Icelandair flights from London to Chicago
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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 typical price of a round-trip flight between London and Chicago?
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, with most prices found around $580. If you’re not able to fly to Chicago in February, then March is your next best option. Flight prices from London to Chicago during March average around $610.
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 $803. 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 to Chicago for around $916.
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 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 $958.
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 weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $740 when searching 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 $703 on momondo.
What cabin class options are available on London to Chicago flights?
There are 4 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.
Can stopping save me money on London to Chicago flights?
You could potentially save up to 2% on your flight if you consider stops on a London to Chicago flight.
How have London to Chicago flight prices changed over time?
As of July 2025, prices for London to Chicago flights are approximately 6% more expensive when compared to flights at the same time last year.
How many flights depart from London to Chicago on average per day?
As of July 2025, there are 42 flights per day flying from London to Chicago. The most common time of day flights depart is 2:00PM, with 52% of flights taking off at noon.
How many flights depart from London to Chicago on average per week?
295 flights are operational weekly from London to Chicago as of July 2025. The most popular departure day for this route is Mon, with 16% of flights per week 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 3945.2 mi. Flights usually cover this in 9h 10m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London to Chicago?
Prices for flights from London to Chicago refresh daily.
How many operators does momondo search for flights from London to Chicago?
As of July 2025, there are 11 operators available to choose from for flights from London to Chicago.
How old do you have to be to fly from London to Chicago?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Chicago.
What documentation or ID do you need to fly to Chicago?
The travel and health documents required for your trip to Chicago can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Chicago. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from London to Chicago?
momondo data reveals that the most frequently booked plane model on the route from London to Chicago is Boeing 767-300, representing 43.00% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 18.54%, Boeing 777 at 15.52%, and Boeing 777-300ER at 6.33%.
What is the most popular airline from London to Chicago?
momondo data reveals that the most frequently booked airline on the route from London to Chicago is British Airways, representing 37% of all bookings. The subsequent popular airlines are American Airlines at 15%, Icelandair at 10%, and United Airlines at 8%.
Best airlines flying from London to Chicago
Compare and see reviews for airlines that fly from London to Chicago with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $390 | Free Cancellation | Rating 7.0 514 reviews | |||
| PriceFrom $462 | Free Cancellation | Rating 7.3 1,416 reviews | |||
| PriceFrom $483 | Free Cancellation | Rating 7.1 1,912 reviews | |||
| PriceFrom $485 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $551 | Free Cancellation | Rating 6.6 7,093 reviews | |||
| PriceFrom $568 | Free Cancellation | Rating 7.1 1,144 reviews | |||
| PriceFrom $582 | Free Cancellation | Rating 7.0 2,819 reviews | |||
| PriceFrom $582 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $586 | Free Cancellation | Rating 7.6 809 reviews | |||
| PriceFrom $607 | Free Cancellation | Rating 7.6 1,306 reviews |
Austrian Airlines Flights From London to Chicago
Austrian Airlines flight deals from London 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 to Chicago
The best Finnair deal for London to Chicago flight tickets found on momondo in the last 72 hours was $607, round-trip. It should be noted that an average Finnair flight deal for this route in this time was higher, at $838 round-trip. Finnair operates 26 flights out of London into Chicago in an average week, so prices vary by time and availability. 1,306 Finnair reviews by users on momondo have scored the airline at 7.6/10.
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?
It is quick and easy to find London to Chicago flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Chicago that suits you.
Can I find flights from London to Chicago with flexible booking policies on momondo?
Yes. All flights to Chicago from London on momondo can be compared and filtered by various policies on offer, including flexible booking.
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?
If you are not ready to book a flight from London to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.