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Cheap Flights from Chicago O'Hare International to London Heathrow

Compare Chicago O'Hare International to London Heathrow flight deals

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

Book the best London Heathrow fare with no extra fees

Flight deals from Chicago O'Hare International to London Heathrow

Looking for a cheap last-minute deal or the best return flight from Chicago O'Hare International Airport to London Heathrow Airport? If you want to travel next month, return fares start from R 11,945. Find the lowest prices on one-way and return tickets right here.
London.R 4,543 per passenger.Departing Sat, 29 Aug.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sat, 29 Aug, arriving in London Heathrow.Price includes taxes and charges.From R 4,543, select.
London.R 4,860 per passenger.Departing Fri, 13 Nov.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Fri, 13 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 4,860, select.
London.R 4,875 per passenger.Departing Sat, 17 Oct.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sat, 17 Oct, arriving in London Heathrow.Price includes taxes and charges.From R 4,875, select.
London.R 4,953 per passenger.Departing Mon, 3 May.One-way flight with ITA Airways.Outbound indirect flight with ITA Airways, departs from Chicago O'Hare International on Mon, 3 May, arriving in London Heathrow.Price includes taxes and charges.From R 4,953, select.
London.R 4,983 per passenger.Departing Sat, 30 Jan.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sat, 30 Jan, arriving in London Heathrow.Price includes taxes and charges.From R 4,983, select.
London.R 4,993 per passenger.Departing Thu, 3 Dec.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Thu, 3 Dec, arriving in London Heathrow.Price includes taxes and charges.From R 4,993, select.
London.R 4,994 per passenger.Departing Sat, 24 Apr.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sat, 24 Apr, arriving in London Heathrow.Price includes taxes and charges.From R 4,994, select.
London.R 5,004 per passenger.Departing Sun, 13 Sep.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sun, 13 Sep, arriving in London Heathrow.Price includes taxes and charges.From R 5,004, select.
London.R 5,011 per passenger.Departing Thu, 4 Feb.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Thu, 4 Feb, arriving in London Heathrow.Price includes taxes and charges.From R 5,011, select.
London.R 5,020 per passenger.Departing Sun, 7 Mar.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Chicago O'Hare International on Sun, 7 Mar, arriving in London Heathrow.Price includes taxes and charges.From R 5,020, select.
London.R 5,282 per passenger.Departing Tue, 11 May.One-way flight with Iberia.Outbound direct flight with Iberia departs from Chicago O'Hare International on Tue, 11 May, arriving in London Heathrow.Price includes taxes and charges.From R 5,282, select.
London.R 5,291 per passenger.Departing Mon, 15 Mar.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Mon, 15 Mar, arriving in London Heathrow.Price includes taxes and charges.From R 5,291, select.
London.R 5,294 per passenger.Departing Tue, 3 Nov.One-way flight with Iberia.Outbound direct flight with Iberia departs from Chicago O'Hare International on Tue, 3 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 5,294, select.
London.R 5,298 per passenger.Departing Mon, 26 Oct.One-way flight with Iberia.Outbound direct flight with Iberia departs from Chicago O'Hare International on Mon, 26 Oct, arriving in London Heathrow.Price includes taxes and charges.From R 5,298, select.
London.R 5,303 per passenger.Departing Sun, 25 Apr.One-way flight with Iberia.Outbound direct flight with Iberia departs from Chicago O'Hare International on Sun, 25 Apr, arriving in London Heathrow.Price includes taxes and charges.From R 5,303, select.
London.R 5,303 per passenger.Departing Wed, 2 Dec.One-way flight with Iberia.Outbound direct flight with Iberia departs from Chicago O'Hare International on Wed, 2 Dec, arriving in London Heathrow.Price includes taxes and charges.From R 5,303, select.

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

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chicago O'Hare International to London Heathrow flights are currently cheapest in August.
Jul
from R 5,458
Aug
from R 4,543
Sep
from R 5,004
Oct
from R 4,875
Nov
from R 4,860
Dec
from R 4,993
Jan
from R 4,983
Feb
from R 5,011
Mar
from R 5,020
Apr
from R 4,994
May
from R 4,953
Jun
from R 8,431

Direct flights from Chicago O'Hare International to London Heathrow

Chicago O'Hare International to London Heathrow: Alternative routes

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

London City

12km from central London
Closest
from R 5,284
Search flights

London Heathrow

23km from central London
from R 4,543
Search flights

London Gatwick

40km from central London
Cheapest
from R 4,004
Search flights

London Luton

45km from central London
from R 4,436
Search flights

London Stansted

49km from central London
from R 4,060
Search flights

London Southend

57km from central London
from R 4,422
Search flights

Chicago to London: Flight information

The things to know before you go.
Cheapest flight foundR 4,543
Cheapest month to flyAugust
Average flight time7 hrs, 58 mins
Most popular airlineAmerican Airlines
Average flights per week457

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

The best price we found for a return flight from Chicago O'Hare International to London Heathrow is R 9,875. 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 58 minutes is the average flight time from Chicago O'Hare International to London Heathrow.
American Airlines, British Airways and Alaska Airlines fly direct from Chicago O'Hare International to London Heathrow.
As of July 2026, there are 457 flights per week flying from Chicago O'Hare International to London Heathrow.
The cheapest month to fly from Chicago O'Hare International to London Heathrow is usually October.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Chicago O'Hare International Airport to London Heathrow Airport on Friday, 9 October 2026.
Yes – the average flight time is 7 hours and 58 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 Heathrow 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.

Currently, Icelandair and Finnair offer the cheapest flight tickets to London Heathrow.

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

  • Take a direct flight from Chicago O'Hare International Airport to London Heathrow Airport and you'll be in the air for an average of 8 hours.

  • London is six hours ahead of Chicago and is in the UTC+0 timezone.

  • Pack your suitcase and choose from 56 weekly Chicago O'Hare International Airport to London Heathrow Airport flights.

  • To ensure you catch your ORD to LHR flight, allow plenty of time to check in and drop off your luggage. Turning up two hours before international departures and one hour before domestic flights is the standard rule.

  • During popular months like July, you'll want to get to the airport well in advance. Plan to arrive two hours before domestic departures and four hours ahead for international flights when you fly during a high season in general.

  • You can travel nonstop to London, the United Kingdom. Take to the skies with one of these airlines offering direct flights from Chicago O'Hare International Airport to London Heathrow Airport:

  • Most travellers choose to fly with United on this route.

  • The carrier with the top on-time arrival performance for ORD to LHR flights is Aer Lingus.

  • Think about adding a stopover when booking your ticket from Chicago O'Hare International Airport to London Heathrow Airport. Just deselect 'Direct flights only' to break up your journey, or even explore someplace new along the way. Here's where you can stop between ORD and LHR:

    • Toronto Pearson International Airport

    • Detroit Wayne County Airport

    • Dublin Airport

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

  • The cheapest price we've seen for a one-way Chicago O'Hare International Airport to London Heathrow Airport flight is R 4,543. A return fare right now is R 9,875. Depending on the availability when you book, these fares could change.

  • To pick up cheap tickets from ORD to LHR, reserve your trip six months before your departure date.

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

  • Save time looking for cheap flights from ORD to LHR by setting up a Price Alert. You'll receive an email or notification on the app when a new low fare is offered.

  • Choose your ideal arrival and departure times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to see the best deals on flights from Chicago O'Hare International Airport to London Heathrow Airport.

Handy information about Chicago O'Hare International Airport (ORD)

  • The address for ORD is 10000 West O'Hare.

  • 70% of flights that depart Chicago O'Hare International Airport land at their destination on time.

  • To reach Chicago O'Hare International Airport from central Chicago, it'll take about 30 minutes if you're planning to drive. Of course, this depends on traffic conditions. It's approximately 27 kilometres from the airport to the city centre.

  • Taking public transport? Expect a trip time of around 45 minutes.

  • Get your trip off to a leisurely start by staying near ORD. Whether you've booked an early flight from Chicago O'Hare International Airport to London Heathrow Airport or just don't like being rushed, these hotels are ideal:

Arriving at London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • London Heathrow Airport to the centre of London has a drive time of around 45 minutes. It's approximately 24 kilometres away.

  • If you're travelling by public transport, expect a journey time of about 25 minutes.

When to fly to London Heathrow Airport (LHR)

  • It's time to work out your dates for your flight from Chicago O'Hare International Airport to London Heathrow Airport. July is the most popular month to visit London. If you like a quieter vibe, go in March.

  • When reserving your flight from Chicago O'Hare International Airport to London Heathrow Airport, consider the type of weather you like. July is the warmest month in London, with the temperature ranging from 11ºC (52ºF) to 26ºC (79ºF).

  • If you'd rather travel in cooler conditions, search for a cheap ticket from ORD to LHR in January. Temperatures average between 0ºC (32ºF) and 9ºC (48ºF) then.

Explore more of the United Kingdom

  • London is always a good idea, but there are so many other corners of the United Kingdom you should also see. About 257 kilometres north-west of London, a visit to Manchester will keep you on the move. Don't miss top attractions like Manchester United Museum & Stadium Tour, The Homes of Football and Museum of Science and Industry.

  • Birmingham is another essential stop in the United Kingdom and is around 161 kilometres north-west of London. No trip is complete without a visit to Birmingham Museum & Art Gallery, Birmingham Hippodrome Theatre and Bournville Experience.

Plan the rest of your trip from Chicago to London

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.