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 to London Heathrow? Find the lowest prices on one-way and return tickets right here.

London.R 4,055 per passenger.Departing Mon, 8 Dec.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Mon, 8 Dec, arriving in London Heathrow.Price includes taxes and charges.From R 4,055, select.

London.R 4,083 per passenger.Departing Wed, 12 Nov.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Wed, 12 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 4,083, select.

London.R 4,296 per passenger.Departing Mon, 26 Jan.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Chicago O'Hare International on Mon, 26 Jan, arriving in London Heathrow.Price includes taxes and charges.From R 4,296, select.

London.R 4,300 per passenger.Departing Mon, 16 Feb.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Chicago O'Hare International on Mon, 16 Feb, arriving in London Heathrow.Price includes taxes and charges.From R 4,300, select.

London.R 4,325 per passenger.Departing Mon, 9 Mar.One-way flight with WestJet.Outbound indirect flight with WestJet, departs from Chicago O'Hare International on Mon, 9 Mar, arriving in London Heathrow.Price includes taxes and charges.From R 4,325, select.

London.R 5,520 per passenger.Departing Tue, 5 May.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Chicago O'Hare International on Tue, 5 May, arriving in London Heathrow.Price includes taxes and charges.From R 5,520, select.

London.R 5,520 per passenger.Departing Wed, 1 Apr.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Chicago O'Hare International on Wed, 1 Apr, arriving in London Heathrow.Price includes taxes and charges.From R 5,520, select.

London.R 6,273 per passenger.Departing Sun, 27 Sep.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Chicago O'Hare International on Sun, 27 Sep, arriving in London Heathrow.Price includes taxes and charges.From R 6,273, 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 December.

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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.

Chicago to London: Flight information

The things to know before you go.

Cheapest flight found	R 4,055
Cheapest month to fly	December
Average flight time	7 hrs, 59 mins
Most popular airline	British Airways
Average flights per week	435

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

How much are return flights from Chicago O'Hare International to London Heathrow?

The best price we found for a return flight from Chicago O'Hare International to London Heathrow is R 8,962. 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.

How long does it take to fly from Chicago O'Hare International to London Heathrow?

7 hours and 59 minutes is the average flight time from Chicago O'Hare International to London Heathrow.

Which airlines fly direct from Chicago O'Hare International to London Heathrow?

British Airways, Alaska Airlines and American Airlines fly direct from Chicago O'Hare International to London Heathrow.

How many flights are there a week from Chicago O'Hare International to London Heathrow?

As of November 2025, there are 435 flights per week flying from Chicago O'Hare International to London Heathrow.

When is the cheapest time to fly from Chicago O'Hare International to London Heathrow?

The cheapest month to fly from Chicago O'Hare International to London Heathrow is usually January.

Which upcoming date is cheapest to fly from Chicago O'Hare International Airport to London Heathrow Airport on?

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 January 2026.

Can I get a direct flight from Chicago O'Hare International Airport to London Heathrow Airport?

Yes – the average flight time is 7 hours and 59 minutes.

How can I find the best flight deal to London Heathrow?

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.

When is the best time to book flights to London?

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.

Which is the cheapest airline to fly from Chicago O'Hare International Airport to London Heathrow with?

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

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

Around 7 hours 55 minutes is how long you can expect to be travelling on a direct flight from O'Hare International Airport to London Heathrow Airport.
The timezone in London is UTC+0, which is five hours ahead of Chicago.
Take your pick of 89 weekly O'Hare International Airport to London Heathrow Airport flights. The 08:10 departure with American Airlines is the earliest flight you can take. American Airlines operates the last service of the day at 23:05.
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 an hour before domestic flights is the general travel rule.
Travelling during a peak time such as August? Public holidays and other high seasons can result in longer lines at security. Be extra cautious and arrive up to four hours ahead of international flights and two hours before domestic departures.
A range of airlines operate direct flights from O'Hare International Airport to London Heathrow Airport, so jetting to London (and then visiting more of United Kingdom!) is easy. Popular carriers that fly nonstop include:
American Airlines is the most frequently booked airline on this route.
The most punctual carrier that operates ORD to LHR flights is American Airlines. Its services arrive as scheduled 66.09% of the time.
We make it a piece of cake to book a flight with a stopover. To see your options for tickets from O'Hare International Airport to London Heathrow Airport, uncheck 'Direct flights only.' Then, choose a flight with a stop long enough to explore your chosen city. Stopovers between ORD and LHR include:
- Dublin Airport
- Detroit Metropolitan Wayne County Airport
- Pearson International Airport

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

The lowest price we've found for a one-way O'Hare International Airport to London Heathrow Airport flight is R 4,055. A round-trip ticket right now is R 8,962. Depending on the availability and when you book, these fares may change.
To pick up cheap tickets from ORD to LHR, book as early as you can. Airlines tend to offer their best fares when flights are first made available.
November is the cheapest month for flights from O'Hare International Airport to London Heathrow Airport. If you prefer to travel at a different time of year, the 'Whole month' tool will show you the lowest airfares for every month.
Landing cheap flights from ORD to LHR is a cinch with Price Alerts. All you need to do is create one of these automatic alerts and we'll let you know as soon as a lower fare pops up.
Find the ideal flight for you by using the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from O'Hare International Airport to London Heathrow Airport, use the 'Sort by' tool. You can also filter results by departure and arrival times, airline, and number of stops.

Handy information about O'Hare International Airport (ORD)

ORD's address is 10000 West O'Hare.
74.85% of flights departing from O'Hare International Airport land at their destination on time.
O'Hare International Airport is around 40 kilometres from central Chicago. If you're catching a cab, ride-sharing or driving from the centre, it'll take you 35 minutes or so to arrive, depending on the traffic.
The journey when using public transport typically takes 55 minutes.
Get your trip off to a stress-free start by staying near ORD. Whether you're boarding an early flight from O'Hare International Airport to London Heathrow Airport or just don't like being rushed, these stays are the answer:

Arriving at London Heathrow Airport (LHR)

Reserve a hotel close to LHR if you're catching a late O'Hare International Airport to London Heathrow Airport flight. Select one of these accommodation options and skip the long transfer:
Go where the road takes you with a London Heathrow Airport rental car. Pick up a set of wheels from Surprice, U-Save or Green Motion and see more of London and beyond.
Reserving your vehicle from London Heathrow Airport about one week ahead can help you get the best possible rate.

Getting from London Heathrow Airport (LHR) to central London

London Heathrow Airport to the centre of London has a drive time of around 55 minutes. It's approximately 31 kilometres away.
Travelling by public transport will take you around 1 hour.

When to fly to London Heathrow Airport (LHR)

It's time to pick your trip dates for your flight from O'Hare International Airport to London Heathrow Airport. July is the most popular month to head to London. If you want a more low-key vibe, go in February.
The warmest month in London is July, with the temperature ranging between 11ºC (52ºF) and 26ºC (79ºF). Lock in your flights from O'Hare International Airport to London Heathrow Airport in this month if this is the type of weather you enjoy.
If you'd rather travel in cooler conditions, search for a cheap ticket from ORD to LHR in January. Average temperatures are between 0ºC (32ºF) and 9ºC (48ºF) then.

Explore more of United Kingdom

London is always a good idea, but there are so many other parts of United Kingdom you should also see. About 161 kilometres north-west of London, a visit to Birmingham will keep your itinerary busy. Start with leading sights like Cadbury World, The Library of Birmingham and National Sea Life Centre.
Around 177 kilometres west of London, Bristol is another favourite stop in United Kingdom. Start your sightseeing at Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park.