Cheap flights from Chicago to London from $203
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 to London departing on 7/12. 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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United Airlines flights from Chicago to London
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How to get the cheapest flight ticket from Chicago 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 typical price of a round-trip flight between Chicago and London?
What is the cheapest month to fly to London?
The cheapest month to fly to London from Chicago is in February. Flight prices, which tend to average around $648, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Chicago averaging around $664.
What is the cheapest day to depart on your flight to London?
The cheapest day to depart from Chicago to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $765. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $887. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.
What is the cheapest time of day to depart on your flight to London?
Flying to London from Chicago in the morning is the least expensive time of day to depart. momondo users have found prices as low as $698 when looking at flights departing in the morning. Flights to London are more costly in the afternoon, with an average ticket price of $824. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Chicago to London flight route?
Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to London 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 from Chicago for as low as $715 on momondo.
What cabin class options are available on Chicago to London flights?
There are 4 cabin classes available to choose from on Chicago 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 to London flights?
You could potentially save up to 20% on your flight if you consider stops on a Chicago to London flight.
How have Chicago to London flight prices changed over time?
As of June 2025, prices for Chicago to London flights are approximately 15% more expensive when compared to flights at the same time last year.
What is the cheapest airline that flies from Chicago to London?
TAP AIR PORTUGAL and Icelandair are the most popular carriers operating from Chicago to London
What airlines fly to London?
British Airways, Iberia and American Airlines are the top three most popular airlines that fly to London from Chicago according to our data. British Airways is the first choice among our users, with 46% of people opting to fly with this airline when traveling to London. Keep in mind that there are 17 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 to London on average per day?
As of June 2025, there are 49 flights per day flying from Chicago to London. The most common time of day flights depart is 4:00PM, with 63% of flights taking off in the evening.
How many flights depart from Chicago to London on average per week?
346 flights are operational weekly from Chicago to London as of June 2025. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.
When to book flights from Chicago to London
Cheap Chicago to London (CHI to LON) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Chicago to London
How far is Chicago to London by plane?
A flight from Chicago to London will travel around 3945.2 mi. Flights usually cover this in 7h 40m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Chicago to London?
Prices for flights from Chicago to London refresh daily.
How many operators does momondo search for flights from Chicago to London?
The number of operators available for flights from Chicago to London is 17 as of June 2025.
How old do you have to be to fly from Chicago 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 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 to London?
Based on momondo bookings for flights between Chicago and London, the leading plane model is Boeing 787-9 Dreamliner, making up 42.13% of the total bookings. Other popular models include Boeing 777 with 18.51%, Boeing 787-10 Dreamliner with 18.10%, and Boeing 767-300 with 12.87%.
What is the most popular airline from Chicago to London?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Chicago to London is British Airways (27% of total bookings). The next most popular airlines are Iberia (24%), American Airlines (10%), and United Airlines (10%).
Best airlines flying from Chicago to London
Compare and see reviews for airlines that fly from Chicago to London with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $257 | Free Cancellation | Rating 7.5 1,649 reviews | |||
| PriceFrom $345 | Free Cancellation | Rating 8.0 7,964 reviews | |||
| PriceFrom $381 | Free Cancellation | Rating 7.3 1,412 reviews | |||
| PriceFrom $440 | Free Cancellation | Rating 6.8 7,200 reviews | |||
| PriceFrom $464 | Free Cancellation | Rating 7.0 510 reviews | |||
| PriceFrom $507 | Free Cancellation | Rating 7.1 1,905 reviews | |||
| PriceFrom $516 | Free Cancellation | Rating 7.3 2,922 reviews | |||
| PriceFrom $545 | Free Cancellation | Rating 7.1 1,135 reviews | |||
| PriceFrom $569 | Free Cancellation | Rating 7.6 1,298 reviews | |||
| PriceFrom $581 | Free Cancellation | Rating 7.0 2,804 reviews |
Alaska Airlines Flights From Chicago to London
Across 33 Alaska Airlines flights from Chicago to London this week, the average price was $973, with the best Alaska Airlines deals starting from $809 round-trip. 10,000 users have rated Alaska Airlines on momondo, with an average score of 8.0/10.
Finnair Flights From Chicago to London
The best Finnair deal for Chicago to London flight tickets found on momondo in the last 72 hours was $569, round-trip. It should be noted that an average Finnair flight deal for this route in this time was higher, at $752 round-trip. Finnair operates 26 flights out of Chicago into London in an average week, so prices vary by time and availability. 1,298 Finnair reviews by users on momondo have scored the airline at 7.6/10.
Traveling to a place near London?
Book flights to London if you plan to visit one of these locationsWhy use momondo?
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?
Yes. momondo enables you to select and highlight flights to London from Chicago with this policy.
How can momondo help me find flights from Chicago to London?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Chicago.
I’m not ready to book a flight from Chicago to London right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to London from Chicago. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.