Cheap flights from Chicago O'Hare Intl Airport to London from $221
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 7/28. 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 Heathrow Airport
Our best Scandinavian Airlines deals on Chicago O'Hare Intl Airport to London Heathrow Airport flight tickets
Icelandair flights from Chicago O'Hare Intl Airport to London Heathrow Airport
Our best Icelandair deals on Chicago O'Hare Intl Airport to London Heathrow Airport flight tickets
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How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to London Heathrow Airport
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 typical price of a round-trip flight between Chicago O'Hare Intl Airport and London Heathrow Airport?
What is the cheapest month to fly to London Heathrow Airport?
The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Chicago O'Hare Intl Airport, with most prices found around $672. If you’re not able to fly to London Heathrow Airport in February, then April is your next best option. Flight prices from Chicago O'Hare Intl Airport to London Heathrow Airport during April average around $677.
What is the cheapest day to depart on your flight to London Heathrow Airport?
Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $763. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $888.
What is the cheapest time of day to depart on your flight to London Heathrow Airport?
According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Chicago O'Hare Intl Airport to London Heathrow Airport in the morning for as low as $694. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $825.
What is the cheapest Chicago O'Hare Intl to London Heathrow flight route?
Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago O'Hare Intl - London Heathrow flight prices
How far in advance should I book a flight to London Heathrow Airport?
You are more likely to see cheaper flights to London Heathrow Airport from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $802 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Chicago O'Hare Intl Airport for as low as $715 on momondo.
What cabin class options are available on Chicago O'Hare Intl to London Heathrow flights?
There are 4 cabin classes available to choose from on Chicago O'Hare Intl to London Heathrow 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 Heathrow Airport flights?
You could potentially save up to 20% on your flight if you consider stops on a Chicago O'Hare Intl Airport to London Heathrow Airport flight.
How have Chicago O'Hare Intl Airport to London Heathrow Airport flight prices changed over time?
As of June 2025, prices for Chicago O'Hare Intl Airport to London Heathrow Airport flights are approximately 23% 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 Heathrow?
TAP AIR PORTUGAL and Icelandair are the most popular carriers operating from Chicago O'Hare Intl to London Heathrow
What airlines fly to London Heathrow Airport?
British Airways, Iberia and American Airlines are the top three most popular airlines that fly to London Heathrow Airport from Chicago O'Hare Intl Airport according to our data. British Airways is the first choice among our users, with 47% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 15 different airlines that fly to London Heathrow Airport 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 Heathrow Airport on average per day?
As of June 2025, 50 flights take off from Chicago O'Hare Intl Airport and land in London Heathrow Airport each day. The most common flight departure time for this route is 4:00PM, with 63% of daily flights taking off in the evening.
How many flights depart from Chicago O'Hare Intl Airport to London Heathrow Airport on average per week?
As of June 2025, 351 flights take off from Chicago O'Hare Intl Airport and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.
When to book flights from Chicago O'Hare Intl Airport to London Heathrow Airport
Cheap Chicago O'Hare Intl Airport to London Heathrow Airport (ORD to LHR) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to London Heathrow Airport
How far is Chicago O'Hare Intl to London Heathrow by plane?
London Heathrow is 3939.2 mi away from Chicago O'Hare Intl. By plane, this route typically takes 10h 20m.
When did momondo last update prices for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?
Prices for flights from Chicago O'Hare Intl Airport to London Heathrow Airport refresh daily.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to London Heathrow Airport?
The number of operators available for flights from Chicago O'Hare Intl Airport to London Heathrow Airport is 15 as of June 2025.
How old do you have to be to fly from Chicago O'Hare Intl Airport to London Heathrow Airport?
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 Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents you'll need for your trip to London Heathrow Airport 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 Heathrow Airport. 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 Heathrow Airport?
momondo data reveals that the most frequently booked plane model on the route from Chicago O'Hare Intl Airport to London Heathrow Airport is Boeing 787-9 Dreamliner, representing 41.86% of all bookings. The subsequent popular models are Boeing 777 at 18.63%, Boeing 787-10 Dreamliner at 17.87%, and Boeing 767-300 at 13.31%.
What is the most popular airline from Chicago O'Hare Intl Airport to London Heathrow Airport?
Based on momondo bookings for flights between Chicago O'Hare Intl Airport and London Heathrow Airport, the leading airline is British Airways, making up 37% of the total bookings. Other popular airlines include Iberia with 22%, American Airlines with 12%, and United Airlines with 9%.
Best airlines flying from Chicago O'Hare Intl Airport to London Heathrow Airport
Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $257 | Free Cancellation | Rating 7.5 1,654 reviews | |||
| PriceFrom $345 | Free Cancellation | Rating 8.0 7,973 reviews | |||
| PriceFrom $381 | Free Cancellation | Rating 7.3 1,413 reviews | |||
| PriceFrom $430 | Free Cancellation | Rating 6.8 7,200 reviews | |||
| PriceFrom $465 | Free Cancellation | Rating 7.0 513 reviews | |||
| PriceFrom $507 | Free Cancellation | Rating 7.1 1,911 reviews | |||
| PriceFrom $516 | Free Cancellation | Rating 7.3 2,920 reviews | |||
| PriceFrom $543 | Free Cancellation | Rating 7.1 1,140 reviews | |||
| PriceFrom $569 | Free Cancellation | Rating 7.6 1,299 reviews | |||
| PriceFrom $581 | Free Cancellation | Rating 7.0 2,810 reviews |
Alaska Airlines Flights From Chicago O'Hare Intl Airport to London Heathrow Airport
Alaska Airlines operates around 34 flights from Chicago O'Hare Intl Airport to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been $973, but momondo users have found Alaska Airlines deals from Chicago O'Hare Intl Airport to London Heathrow Airport from as low as $809 round-trip. Alaska Airlines has been scored 8.0/10 in 10,000 reviews.
Finnair Flights From Chicago O'Hare Intl Airport to London Heathrow Airport
Another popular option for Chicago O'Hare Intl Airport to London Heathrow Airport flights is Finnair (7.6/10, 1,299 ratings). Finnair flies from Chicago O'Hare Intl Airport to London Heathrow Airport around 27 times per week, with deals starting from $569 round-trip and rising to an average price of around $753.
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Why should I use momondo to find a flight deal from Chicago to London?
It is quick and easy to find Chicago to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.
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 helps you find the best flight between Chicago and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Chicago to London right now. Can momondo alert me if prices change?
Price alerts on flights to London from Chicago are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.