£310 Cheap Flights from Chicago (ORD) to London (LHR)

View £310 flight on Sun, 1 Nov 2026Opens in a new window

Popular airlines from Chicago O'Hare International Airport (ORD) to Heathrow Airport (LHR)

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Cheap Flights from Chicago (ORD) to London (LHR)

Prices were available within the past 7 days and start at £310 for one-way flights and £555 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Mon, 23 Nov - Fri, 27 Nov
ORD
Chicago
LHR
London
£555 Return, found 1 day ago
£555
Return
found 1 day ago
Select Icelandair flight, departing Mon, 23 Nov from Chicago to London, returning Fri, 27 Nov, priced at £555 found 1 day ago
Scandinavian Airlines
Thu, 5 Nov - Sun, 8 Nov
ORD
Chicago
LHR
London
£570 Return, found 11 hours ago
£570
Return
found 11 hours ago
Select Scandinavian Airlines flight, departing Thu, 5 Nov from Chicago to London, returning Sun, 8 Nov, priced at £570 found 11 hours ago
Delta
Tue, 3 Nov - Thu, 5 Nov
ORD
Chicago
LHR
London
£587 Return, found 3 days ago
£587
Return
found 3 days ago
Select Delta flight, departing Tue, 3 Nov from Chicago to London, returning Thu, 5 Nov, priced at £587 found 3 days ago
Virgin Atlantic
Mon, 2 Nov - Wed, 4 Nov
ORD
Chicago
LHR
London
£601 Return, found 3 days ago
£601
Return
found 3 days ago
Select Virgin Atlantic flight, departing Mon, 2 Nov from Chicago to London, returning Wed, 4 Nov, priced at £601 found 3 days ago
TAP Portugal
Wed, 7 Oct - Wed, 18 Nov
ORD
Chicago
LHR
London
£612 Return, found 1 day ago
£612
Return
found 1 day ago
Select TAP Portugal flight, departing Wed, 7 Oct from Chicago to London, returning Wed, 18 Nov, priced at £612 found 1 day ago
Aer Lingus
Tue, 3 Nov - Wed, 18 Nov
ORD
Chicago
LHR
London
£628 Return, found 1 day ago
£628
Return
found 1 day ago
Select Aer Lingus flight, departing Tue, 3 Nov from Chicago to London, returning Wed, 18 Nov, priced at £628 found 1 day ago
Iberia
Wed, 13 May - Tue, 13 Oct
ORD
Chicago
LHR
London
£632 Return, found 20 hours ago
£632
Return
found 20 hours ago
Select Iberia flight, departing Wed, 13 May from Chicago to London, returning Tue, 13 Oct, priced at £632 found 20 hours ago
Finnair
Mon, 14 Sept - Tue, 6 Oct
ORD
Chicago
LHR
London
£635 Return, found 10 hours ago
£635
Return
found 10 hours ago
Select Finnair flight, departing Mon, 14 Sept from Chicago to London, returning Tue, 6 Oct, priced at £635 found 10 hours ago
KLM
Wed, 13 May - Tue, 13 Oct
ORD
Chicago
LHR
London
£636 Return, found 20 hours ago
£636
Return
found 20 hours ago
Select KLM flight, departing Wed, 13 May from Chicago to London, returning Tue, 13 Oct, priced at £636 found 20 hours ago
United
Sun, 3 May - Fri, 15 May
ORD
Chicago
LHR
London
£637 Return, found 6 hours ago
£637
Return
found 6 hours ago
Select United flight, departing Sun, 3 May from Chicago to London, returning Fri, 15 May, priced at £637 found 6 hours ago

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Gatwick LGW. Average driving time to city centre is 52 minutes. Flights from £634
LGW
Gatwick
Average driving time to city centre52 min
Flights from £634
Select flight to London City LCY. Closest option available. Average driving time to city centre is 21 minutes. Flights from £842
LCY
London City
Closest
Average driving time to city centre21 min
Flights from £842

Find the cheapest month to fly from Chicago (ORD) to London (LHR)

May is typically the cheapest month to fly

From £428 - £809 per traveller.

Frequently asked questions

How much does a flight from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) cost?
One-way flights typically cost between £297 and £2,249 and return flights often range between £642 and £4,070. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
September is typically the cheapest month to fly from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow), with average return fares of approximately £514. This is about 16% lower than the average price throughout the year. September often sees lower prices as the peak summer travel season ends and demand begins to decrease. Other cheap months to fly from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) include April and October.
Which airlines fly direct from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
Enter ORD to LHR and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
To find a cheap flight from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
The best airline to fly with from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, AA typically offers the lowest fares. AA offers the most daily flights from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
When looking for the best time to fly from Chicago O'Hare International Airport (ORD) to London Heathrow (LHR), you'll find that September and October offer the cheapest fares, with an average return flight costing around £514. While these months are great for your budget, May and December are historically the most popular times to travel this route, meaning you'll have plenty of flight options to choose from. Consider balancing these factors to find the perfect trip for you, based on booking data from the past year.
How many flights per day from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
There are approximately 10 nonstop flights per day from Chicago O'Hare International Airport (ORD) to London Heathrow (LHR). For even more choice, look at flights that include layovers, as there are around 183 connecting flights per day. Some common connection points include John F. Kennedy Intl. (JFK), Logan Intl. (BOS), and Pearson Intl. (YYZ).
What is the earliest flight from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
The earliest flight from Chicago O'Hare International Airport (ORD) to London Heathrow (LHR) typically departs at approximately 12:10 AM local time, operated by American Airlines and British Airways. This is a seasonal service active in December. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
You'll typically find the most flights from Chicago, IL (ORD-O'Hare Intl.) (ORD) to London (LHR-Heathrow) (LHR) on a Wednesday, with around 136 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United Airlines, American Airlines, and Delta Air Lines. Flight schedules are consistent throughout the week.
What are the most popular departure times for flights from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
The most popular departure times for flights from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) are in the late afternoon, from 3pm to 6pm. About 33% of passengers prefer this time. Many major carriers, including United Airlines, Aer Lingus and American Airlines, offer flights during this window. This timing works well because you can have a productive day before heading to the airport, and you'll arrive in London ready to start your day.
How long does it take to fly from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
Direct flights from ORD to LHR usually take about 7 hours 50 minutes, traveling roughly 3,943 miles. If you opt for a connecting flight, expect to add around 4 hours to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
Select the "Business class" and "First class" filters when looking for ORD to LHR flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How much is a business class flight from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
A non-stop, one-way business class flight from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) is usually around £7,040 - £9,829. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Anaa (AAA) (AAA) to Toronto, ON (YYZ-Pearson Intl.) (YYZ) if you opt for a connecting flight.
How do I earn miles on a Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) flight with Expedia?
It's easy to earn miles on a Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for London from O'Hare Intl. (ORD)?
From O'Hare Intl. (ORD), you can fly into London Intl. (YXU), Gatwick (LGW), Heathrow (LHR) and London City (LCY) in London. Some flights may connect through major hubs like LaGuardia (LGA), Liberty Intl. (EWR), Pierre Elliott Trudeau Intl. (YUL) before reaching London. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) at the last minute?
Typically, booking a last minute flight from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) flight and hotel package?
Securing a Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow)?
If you booked your Chicago, IL (ORD-O'Hare Intl.) to London (LHR-Heathrow) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
O'Hare Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Return price
£554
Distance
6307 km
Average flight time
14 hours 2 mins

Book with confidence

Compare flights from Chicago to London easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Chicago to London. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Heathrow in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from O'Hare Intl. to Heathrow.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from O'Hare Intl. (ORD) to Heathrow (LHR)

The easiest way to view the best deals on flights from Chicago to London today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from O'Hare Intl. to Heathrow start at just £555 and range up to £637.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Chicago and London
  • booking your flight during November, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Chicago to London flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from O'Hare Intl. to Heathrow for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Chicago to London easily and book with confidence

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