Cheap flights from Chicago O'Hare Intl Airport to London from £142
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to London departing on 9/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Scandinavian Airlines flights from Chicago O'Hare Intl Airport to London
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Finnair flights from Chicago O'Hare Intl Airport to London
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How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to London
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to London?
The cheapest month to fly to London from Chicago O'Hare Intl Airport is in April. Flight prices, which tend to average around £483, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Chicago O'Hare Intl Airport averaging around £485.
What is the cheapest day to depart on your flight to London?
Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £547. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Chicago O'Hare Intl Airport to London for around £678.
What is the cheapest time of day to depart on your flight to London?
The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £606. Flights at midday are often more expensive, with an average ticket price of £814.
What is the cheapest Chicago O'Hare Intl to London flight route?
Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago O'Hare Intl - London flight prices
How far in advance should I book a flight to London?
You are more likely to see cheaper flights to London from Chicago O'Hare Intl Airport when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to London for around £597 when searching 16 weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Chicago O'Hare Intl Airport for as low as £529 on momondo.
What cabin class options are available on Chicago O'Hare Intl to London flights?
There are 4 cabin classes available to choose from on Chicago O'Hare Intl to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on Chicago O'Hare Intl Airport to London flights?
You could potentially save up to 39% on your flight if you consider stops on a Chicago O'Hare Intl Airport to London flight.
How have Chicago O'Hare Intl Airport to London flight prices changed over time?
As of June 2025, prices for Chicago O'Hare Intl Airport to London flights are approximately 8% more expensive when compared to flights at the same time last year.
What is the cheapest airline that flies from Chicago O'Hare Intl to London?
TAP AIR PORTUGAL and Icelandair are the most popular carriers operating from Chicago O'Hare Intl to London
Which airlines fly to London?
British Airways, Iberia and Finnair are the top three most popular airlines that fly to London from Chicago O'Hare Intl Airport according to our data. British Airways is the first choice among our users, with 52% of people opting to fly with this airline when travelling to London. Keep in mind that there are 7 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.
How many flights depart from Chicago O'Hare Intl Airport to London on average per day?
As of June 2025, 55 flights take off from Chicago O'Hare Intl Airport and land in London each day. The most common flight departure time for this route is 21:00, with 65% of daily flights taking off in the evening.
How many flights depart from Chicago O'Hare Intl Airport to London on average per week?
The number of flights available between Chicago O'Hare Intl Airport and London is 388 per week as of June 2025. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.
When to book flights from Chicago O'Hare Intl Airport to London
Cheap Chicago O'Hare Intl Airport to London (ORD to LON) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to London
How far is Chicago O'Hare Intl to London by plane?
There are 3950.9 mi between Chicago O'Hare Intl and London. Typically, this will take 7h 40m by plane in normal conditions.
When did momondo last update prices for flights from Chicago O'Hare Intl Airport to London?
Prices for flights from Chicago O'Hare Intl Airport to London were last updated today.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to London?
As of June 2025, there are 7 operators available to choose from for flights from Chicago O'Hare Intl Airport to London.
How old do you have to be to fly from Chicago O'Hare Intl Airport to London?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago O'Hare Intl Airport to London.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Chicago O'Hare Intl Airport to London?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Chicago O'Hare Intl Airport to London is Boeing 787-9 Dreamliner (42.06% of total bookings). The next most popular plane models are Boeing 777 (18.56%), Boeing 787-10 Dreamliner (18.41%), and Boeing 767-300 (12.28%).
What is the most popular airline from Chicago O'Hare Intl Airport to London?
momondo data reveals that the most frequently booked airline on the route from Chicago O'Hare Intl Airport to London is British Airways, representing 44% of all bookings. The subsequent popular airlines are Iberia at 26%, Icelandair at 10%, and United Airlines at 8%.
Best airlines flying from Chicago O'Hare Intl Airport to London
Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to London with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £411 | Free Cancellation | Rating 7.1 1,123 reviews | |||
| PriceFrom £413 | Free Cancellation | Rating 7.6 1,292 reviews | |||
| PriceFrom £446 | Free Cancellation | Rating 7.0 2,778 reviews | |||
| PriceFrom £462 | Free Cancellation | Rating 7.4 8,810 reviews | |||
| PriceFrom £464 | Free Cancellation | Rating 6.6 7,031 reviews | |||
| PriceFrom £484 | Free Cancellation | Rating 6.8 7,158 reviews | |||
| PriceFrom £513 | Free Cancellation | Rating 7.2 10,000 reviews |
Finnair Flights From Chicago O'Hare Intl Airport to London
Finnair flight deals from Chicago O'Hare Intl Airport to London start from £556 round-trip. Over the 33 Finnair flights for this route in a normal week, average airfare is usually £808 round-trip - but some users have found much cheaper deals with momondo.
United Airlines Flights From Chicago O'Hare Intl Airport to London
Another popular option for Chicago O'Hare Intl Airport to London flights is United Airlines (7.4/10, 8,810 ratings). United Airlines flies from Chicago O'Hare Intl Airport to London around 21 times per week, with deals starting from £621 round-trip and rising to an average price of around £942.
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Why should I use momondo to find a flight deal from Chicago to London?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to London. momondo saves you time and could save you money on your trip.
Can I find flights from Chicago to London with flexible booking policies on momondo?
All flight searches from Chicago to London on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Chicago to London?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Chicago to London.
I’m not ready to book a flight from Chicago to London right now. Can momondo alert me if prices change?
If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Chicago and alert you when they change.