Cheap Flights from London Heathrow (LHR) to Chicago O'Hare International (ORD)

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Compare London Heathrow to Chicago O'Hare International flight deals

Find the cheapest month or even day of the year to fly to Chicago O'Hare International

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Flight deals from London Heathrow to Chicago O'Hare International

Looking for a cheap last-minute deal or the best round-trip flight from London Heathrow to Chicago O'Hare International? Find the lowest prices on one-way and round-trip tickets right here.

Find the cheapest month to fly from London Heathrow to Chicago O'Hare International

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

Direct flights from London Heathrow to Chicago O'Hare International

London Heathrow to Chicago O'Hare International: Alternative routes

Compare routes from London Heathrow to Chicago below. You may find an airport to fly into that's cheaper, faster, or easier than Chicago O'Hare International.

London to Chicago: Flight information

The things to know before you go.
Cheapest flight found$317
Cheapest month to flyApril
Average flight time8 hrs, 55 mins
Most popular airlineFinnair
Average flights per week543

Finding cheap flights from London Heathrow to Chicago O'Hare International: Frequently asked questions

The best price we found for a round-trip flight from London Heathrow to Chicago O'Hare International is $447. 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.
8 hours and 55 minutes is the average flight time from London Heathrow to Chicago O'Hare International.
Finnair, British Airways and Alaska Airlines fly direct from London Heathrow to Chicago O'Hare International.
There are 543 flights per week flying from London Heathrow to Chicago O'Hare International, as of March 2025.
The cheapest month to fly from London Heathrow to Chicago O'Hare International is usually March 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to Chicago O'Hare International Airport on Friday, February 6, 2026.
Yes – the average flight time is 8 hours and 55 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 Chicago O'Hare International 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 Chicago is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Brussels Airlines and Austrian Airlines offer the cheapest flight tickets to Chicago O'Hare International.

Traveling from London Heathrow Airport (LHR) to O'Hare International Airport (ORD): what you need to know

  • 8 hours 54 minutes is the average time for a direct flight from London Heathrow Airport to O'Hare International Airport. Chicago is 5 hours behind London and is in the UTC-5 timezone.

  • Take your pick of 90 weekly flights from London Heathrow Airport to O'Hare International Airport. The 08:10 departure with American Airlines is the earliest flight you can take from LHR to ORD. American Airlines operates the last service of the day at 23:05.

  • Taking off during a peak time like a public holiday? Expect longer lines at check-in and security. Give yourself extra leeway and arrive up to four hours before international flights and two hours ahead of domestic departures.

  • If you want a stopover for your flight from London Heathrow Airport to O'Hare International Airport, simply uncheck 'Direct flights only' and explore your options. Here are the popular stopovers between LHR and ORD:

    • Montreal-Pierre Elliott Trudeau International Airport

    • Pearson International Airport

    • Dublin Airport

How to find the cheapest flights from London Heathrow Airport (LHR) to O'Hare International Airport (ORD)

  • The best price we've seen for a one-way ticket from London Heathrow Airport to O'Hare International Airport is $317. The cheapest price for a return flight is $447. Bear in mind that fares can change due to demand at the time of booking.

  • Book 9 months before you want to travel. After crunching the numbers on our calendar, this is how far you should book ahead to secure cheap tickets from LHR to ORD.

  • The cheapest month for tickets from London Heathrow Airport to O'Hare International Airport is May. Use the 'Whole month' tool to see the lowest prices if you have flexible travel dates.

  • Snapping up a cheap ticket from LHR to ORD is a breeze with Price Alerts. Simply set up one of these automatic alerts and we'll notify you when there's a better deal.

  • Tailor your flights using filters. Choose your arrival and departure times, airlines and total journey duration. You can also sort results by 'Cheapest,' 'Fastest' or 'Best' flights from London Heathrow Airport to O'Hare International Airport.

Handy information about London Heathrow Airport (LHR)

  • The journey from central London to London Heathrow Airport takes approximately 1 hour and 1 minute on public transport. If you ride-share, drive or get a cab, you'll cover the 19 miles in 57 minutes or so, depending on traffic.

  • Want an easy start to your vacation? Stay near LHR. Whether you have an early flight from London Heathrow Airport to O'Hare International Airport or want to avoid feeling rushed, these hotels have you covered:

Arriving at O'Hare International Airport (ORD)

Getting from O'Hare International Airport (ORD) to central Chicago

  • From O'Hare International Airport, Chicago is approximately 25 miles away. It takes around 35 minutes to get to the center driving.

  • When traveling by public transport, expect a journey of about 54 minutes.

When to fly to O'Hare International Airport (ORD)

  • It's time to choose your dates for your flight from London Heathrow Airport to O'Hare International Airport. August is the busiest month to visit Chicago. If you want a more low-key vibe, go in February.

  • The warmest month in Chicago is July, with temperatures ranging between 59ºF and 84ºF. Book your flights from London Heathrow Airport to O'Hare International Airport in this month if this is the type of weather you enjoy.

  • Search for cheap tickets from LHR to ORD in January if you'd rather travel during cooler conditions. Temperatures are at their lowest around then, ranging between 10ºF and 37ºF on average.

More about Chicago

Complete your Chicago trip with hotels and a car rental

  • Once you've secured your cheap ticket to O'Hare International Airport, browse our low prices and exclusive offers on hotels. You can also compare a range of car rental companies in one place to get the best car rental price for your Chicago escape.

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