Cheap flights from Chicago to London

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Find the cheapest month or even day of the year to fly to London

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Flight deals from Chicago to London

Looking for a cheap last-minute deal or the best return flight from Chicago to London? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Chicago to London

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chicago to London flights are currently cheapest in April.

Direct flights from Chicago to London

Alternative Chicago to London routes

Looking for the cheapest, fastest or easiest route from Chicago to London? You could fly into the following airports instead.

Chicago to London: Flight information

The things to know before you go.
Cheapest flight foundP26,217
Cheapest month to flyApril
Average flight time7 hrs, 52 mins
Most popular airlineFinnair
Average flights per week344

Finding cheap flights from Chicago to London: Frequently asked questions

There are 6 airports in London: London City, London Heathrow, London Gatwick, London Luton, London Stansted, and London Southend.
The best price we found for a return flight from Chicago to London is P26,195. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
7 hours and 52 minutes is the average flight time from Chicago to London.
Finnair, Alaska Airlines and American Airlines fly direct from Chicago to London.
As of February 2025, there are 344 flights per week flying from Chicago to London.
The cheapest month to fly from Chicago to London is usually February 2025.
If you're flying from Chicago, the cheapest airport near London is London Gatwick – which is 40.3 km away from the centre of London. We've found flights into this airport from P26,195.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Chicago to London on Tuesday, 1 April 2025.
Yes – the average flight time is 7 hours and 52 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.
In February, the average temperature is usually around 4°C. August is typically the warmest month in London, when it usually averages around 22°C. You can expect the least rain in March. The coldest month is January, with temperatures averaging 1°C. The rainiest month is October.
The cheapest airline that flies to London is Spirit Airlines. And the cheapest airline that flies to London Heathrow Airport is Iberia.

Travelling from Chicago to London: what you need to know

  • There are a couple of main airports you can start your journey from in Chicago. Explore your options leaving from O'Hare International Airport (ORD) or Chicago Midway International Airport (MDW) when booking your flight from Chicago to London.

  • Land at London Heathrow Airport (LHR), London Gatwick Airport (LGW) or Stansted Airport (STN). You can also disembark at London Luton Airport (LTN) and London City Airport (LCY) in London.

  • 7 hours 53 minutes is the average journey time for a direct flight from Chicago to London. Following the UTC+0 timezone, London is 5 hours ahead of Chicago.

  • O'Hare International Airport (ORD) to London Heathrow Airport (LHR) is the most popular route between these two cities. There are 89 weekly departures to choose from. If you have things to finalize before heading off, the last flight from Chicago to London is with American Airlines at 23:05. Opt for the first ORD to LHR departure with American Airlines at 08:10 if you're more of an early bird.

  • To ensure you get on your flight from Chicago to London, allow plenty of time to navigate the airport and find your gate. Arriving two hours ahead of international departures and one hour before domestic flights is the general travel rule.

  • Flying over a peak time like August? Public holidays and other high seasons can mean longer lines and delays at check-in and security. Be extra cautious and get there up to four hours before international flights and two hours before a domestic departure.

  • If you have a passport from United States and plan to travel to United Kingdom for tourism purposes, you won't need a visa. However, visa and entry requirements may differ based on your reason for visiting and can be subject to change. For the most up-to-date information, contact your destination's nearest embassy or consulate before reserving a cheap flight from Chicago to London.

Flying from Chicago

O'Hare International Airport (ORD)

  • If you're searching for a direct flight from Chicago to London, you can catch one from O'Hare International Airport (ORD). Travel from ORD to London Heathrow Airport (LHR) without any stops.

  • Pick from a variety of airlines offering direct flights from Chicago to London leaving from ORD. Book your seat with one of these:

  • We make it simple to book a flight from Chicago to London with a stopover. To see all your options departing from O'Hare International Airport, uncheck 'Direct flights only.' Next, pick a flight that has a stop long enough to explore the city of your choice. Some popular stopovers include:

    • Edinburgh Airport (EDI)

    • Detroit Metropolitan Wayne County Airport (DTW)

    • Pearson International Airport (YYZ)

  • The journey from central Chicago to ORD takes around 54 minutes on public transport. If you drive, ride-share or grab a cab, you'll cover the 40 kilometres in 35 minutes or so, depending on traffic conditions.

  • Need a convenient hotel near O'Hare International Airport? If you're catching an early flight from Chicago to London, these stays will have you moments from your departure lounge:

Chicago Midway International Airport (MDW)

  • Visit friends or family or just take a moment to recharge with a stopover. If you'd like to split up your flight from Chicago to London, here's where you can stop when setting off from O'Hare International Airport:

    • Edinburgh Airport (EDI)

    • Detroit Metropolitan Wayne County Airport (DTW)

    • Pearson International Airport (YYZ)

  • On public transport, you can travel from central Chicago to MDW in around 46 minutes. The terminal is roughly 19 kilometres away, and making the trip by car takes approximately 21 minutes.

  • It's your holiday, so why not book another night away? Consider staying at one of these accommodation options near Chicago Midway International Airport the day before your flight from Chicago to London:

Arriving in London

London Heathrow Airport (LHR)

  • London Heathrow Airport (LHR) to central London is approximately 31 kilometres. It takes about 57 minutes to reach the centre driving.

  • If you're taking public transport, expect a journey time of around 1 hour and 1 minute.

  • If you're coming in on a late flight from Chicago to London, few things beat the convenience of staying close to the terminal. Grab your luggage from the carousel and then be showered and sleeping not long after at one of these hotels near LHR:

London Gatwick Airport (LGW)

  • The centre of London is approximately 80 kilometres from London Gatwick Airport (LGW). As soon as your flight from Chicago to London has touched down and you've made your way out of the airport, expect a drive of about 1 hour and 19 minutes.

  • You can also opt for public transport, which will take around 1 hour and 26 minutes.

  • After your flight from Chicago to London, kick back at a hotel near LGW. These are some comfortable options that'll help you slip into relaxation mode:

How to find the cheapest flights from Chicago to London

  • The cheapest price we've found for a one-way ticket from Chicago to London is P11,618. For a return flight on this route, the best price is P26,195. Depending on when you book and the availability, these fares could change.

  • To snag cheap tickets from Chicago to London, book your trip 3 months before the departure date.

  • The cheapest month for tickets from Chicago to London is November. You can easily compare prices using the 'Whole month' tool and choose the date that offers the best deal.

  • Sign into your online account or use the app to create a Price Alert. We'll get in touch right away if there's a cheaper deal on this route. It's simple to do, and it'll save you from searching for cheap tickets from Chicago to London every day.

  • Tailor your travel plans using filters. Select your arrival and departure times, airlines and total journey duration. You can also sort your results by 'Best,' 'Fastest' or 'Cheapest' flights from Chicago to London.

Best time to go to London

  • It's time to work out your travel dates for your flight from Chicago to London. July is the busiest month to travel to London. If you prefer a quieter vibe, go in February.

  • Lock in your flight from Chicago to London for July if you'd like to head to the city during its warmest month. You can expect temperatures in London to range from 11ºC to 26ºC.

  • If you'd rather travel in cooler conditions, search for a cheap ticket from Chicago to London in January when temperatures average between 0ºC and 9ºC.

More about London

  • When it comes to searching for somewhere to lay your head, you'll find the top stays in London right here. Explore these hotels as soon as you've locked in your flight from Chicago to London:

  • There are so many things to explore in this city it can be difficult to know where to start. Big Ben, The British Museum and Buckingham Palace are popular attractions which should feature on every London itinerary.

Complete your London trip with a car rental

  • We use the same magic that helped you find your cheap flight from Chicago to London to track down awesome deals on car rentals. Search for your ride in seconds and compare offers in one place. Plus you'll find all the info you need to drive in London, from the most popular car rental to the best time to book.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.