What’s the cheapest layover airport for flights from Chicago to London?

Copenhagen (CPH) is the most affordable 1-stop option, with an average round-trip price of $459.

How much does it cost to fly round-trip from Chicago to London?

Airfare is below average for this route at the moment. Chicago to London flights typically cost between $596 and $865 in November. The cheapest round-trip price found within the last 3 days was $535 on Icelandair (Nov 14-Nov 19).

What’s the top layover airport for flights from Chicago to London?

Reykjavik (KEF) – chosen by Cheapflights users on 58% of 1-stop itineraries from Chicago to London on Cheapflights.

Which airport typically offers the quickest layover for flights from Chicago to London?

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 11m.

What’s the fastest layover option from Chicago to London?

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 10h 03m.

How long is the flight from Chicago to London?

Departing from Chicago to London will take you 15h 03m. There are 3942 mi between Chicago and London. This flight may include one or multiple stops.

What are the cheapest airlines flying from Chicago to London round-trip?

JetBlue, at $51, was found to be the cheapest airline from Chicago to London.Alternate airlines to your destination round-trip include SWISS and Scandinavian Airlines. JetBlue is 93% cheaper than the average price of flights available within the next 90 days to this destination.

How far ahead should I book a flight from Chicago to London?

The best time to book flights from Chicago to London is 33 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Chicago to London?

Currently, May is the cheapest month in which you can book a flight from Chicago to London (average of $399). Flying from Chicago to London in July is currently the most expensive (average of $612). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from Chicago to London?

Travelers seeking maximum savings on their Chicago to London flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago to London

The most flights from CHI to LON are scheduled on a Monday (45 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (41 on average).

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

What are the most popular routes from Chicago to London?

The most popular route from Chicago to London is Chicago O'Hare Intl - London Heathrow. You may also consider Chicago O'Hare Intl - London Gatwick or Chicago O'Hare Intl - London City.

What are the cheapest flights from Chicago to London?

Looking at all options, your cheapest flight can be booked for $396. While the most popular route (Chicago O'Hare Intl - London Heathrow) can be booked for $429 on average, our data indicates $2,667 when flying from Chicago to London.

What are the most reliable airlines from Chicago to London?

Before booking your flight to London from Chicago, check out the most reliable airlines to get you to your destination on time: Gulf Air (75%), Malaysia Airlines (72%), Air Canada( 70%).

What are the most popular airlines that fly from Chicago to London?

When booking a flight from Chicago to London, you may want to consider flying on British Airways, Iberia or United Airlines as they are the most popular for this route.

Where are the most common layover locations when flying from Chicago to London?

Of the flights from Chicago to London that have layovers, most of them stop in Reykjavik. Copenhagen sees the next most layovers on Chicago to London flights.

Where are the least popular layover locations for Chicago to London flights?

Chicago to London flights have a layover in Lisbon least often. Lisbon is followed by Dublin in terms of the least popular layover location on flights from Chicago to London.

What are some popular things to do or see while on a layover in Reykjavik?

Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are the most popular attractions in Reykjavik if you're in need of something to do during your layover. Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool are located about 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers can book a car rental at Reykjavik Keflavik Intl for about $48 per day to make their sightseeing more efficient.

What are some popular points of interest to see during a layover in Copenhagen?

Most Copenhagen visitors opt to spend their time at Tivoli, Rådhuspladsen, and Tøjhusmuseet. Tivoli, Rådhuspladsen and Tøjhusmuseet are located about 5.3 mi, 5.2 mi, and 4.8 mi, respectively from Kastrup Copenhagen if you are interested in checking them out. Those on a layover in Copenhagen in need of a rental car can book one at Kastrup Copenhagen for about $33.

What is the cheapest time of day to fly from CHI to LON?

A simple way to save on the total cost of your ticket is to fly from Chicago to London in the evening. If you’re flexible enough to do this you can expect to save up to 26% on your trip compared to booking a flight at noon.

Most accurate provider : When it comes to deals on Chicago-London flights, users find the pricing of Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Chicago-London flight deals on Cheapflights vs. Justfly.com >95% of the time. Price accuracy is based on data collected from Chicago-London flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Chicago-London flights, Cheapflights users trust Justfly.com the most. Justfly.com has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Chicago-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Chicago to London that include hotel bookings?

Yes. In addition to deals on Chicago to London flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Chicago to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to London.

Can I find deals for business class flights from Chicago to London?

Yes. Cheapflights offers flight deals from Chicago to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$233+ Cheap Flights from Chicago to London

Most accurate provider	Justfly.com 3 stars
Most trusted provider	Justfly.com 3 stars
Round-trip from	$535 (Kiwi.com)
One-way from	$233 (Kiwi.com)
Popular in	June
Cheapest in	February
Average price	$692
Good round-trip deal	$713 or less
Good one-way deal	$439 or less

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Justfly.com	Price Accuracy3 stars	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star
JustAirTicket	Price Accuracy-	Trust Score*1 star

Iberia's premium economy offers 37-inch legroom, footrests, and noise-canceling headphones for long-haul comfort.

Iberia's business class features lay-flat beds with massage function and adjustable pillows for ultimate relaxation.

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest$51	Average$625	FlexibilityNo cancel fee	On-time62%
SWISS	Cheapest$257	Average$685	FlexibilityNo cancel fee	On-time79%
Scandinavian Airlines	Cheapest$338	Average$569	FlexibilityNo cancel fee	On-time77%
Delta	Cheapest$345	Average$927	FlexibilityNo cancel fee	On-timeN/A
TAP AIR PORTUGAL	Cheapest$450	Average$644	FlexibilityNo cancel fee	On-timeN/A
Lufthansa	Cheapest$460	Average$947	FlexibilityNo cancel fee	On-time76%
Icelandair	Cheapest$481	Average$659	FlexibilityNo cancel fee	On-time76%
Alaska Airlines	Cheapest$487	Average$677	FlexibilityNo cancel fee	On-time75%
British Airways	Cheapest$502	Average$795	FlexibilityNo cancel fee	On-time70%
Aer Lingus	Cheapest$515	Average$818	FlexibilityNo cancel fee	On-timeN/A

$233+ Cheap flights from Chicago (CHI) to London (LON)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/13. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Chicago to London are usually found in February or September, booked 33 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Chicago to London

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Find flight deals from Chicago to London

Cheapest flights from Chicago to LondonExplore the most affordable flight options available from Chicago to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2025.

Explore the most affordable flight options available from Chicago to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2025.

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Use the filters below to find and compare flights from Chicago to London that are best for you.

Compare providers for flights from Chicago to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Chicago to London in November.

Best time to book a flight from Chicago to London

Have a flexible travel schedule? Discover the best time to fly to London from Chicago with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Chicago to London

How far ahead should I book a flight from Chicago to London?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to London. Price data was last updated on October 31, 2025.

What is the cheapest month to book a flight from Chicago to London?

What is the cheapest time of day to fly from CHI to LON?

Find hourly flight availability from Chicago to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 4, 2025.

What is the cheapest day to fly from Chicago to London?

Use this chart to determine the cheapest time to fly round-trip from Chicago to London. Price data was last updated on December 16, 2024.

Weekly flight availability from Chicago to London

Explore weekly flight availability from Chicago to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 4, 2025.

How much does it cost to fly round-trip from Chicago to London?

What’s the top layover airport for flights from Chicago to London?

Share of 1-stop round-trip flights from Chicago to London chosen by Cheapflights users in the past 12 months, using the same layover each way.

What’s the cheapest layover airport for flights from Chicago to London?

Average round-trip fare for 1-stop flights from Chicago to London, chosen by Cheapflights users in the past 12 months, with the same layover each way.

What’s the fastest layover option from Chicago to London?

Shortest average travel time for 1-stop one-way flights from Chicago to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Which airport typically offers the quickest layover for flights from Chicago to London?

Average layover duration for 1-stop one-way flights from Chicago to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

The best insider tips for Chicago to London flights

Cheapflights partnered with top experts to bring you the best recommendations for your Chicago to London trip

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Reviews of airlines servicing London

See what other customers who have flown with United Airlines, American Airlines, and Icelandair from Chicago to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Chicago to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from Chicago to London?

What are the cheapest airlines flying from Chicago to London round-trip?

What are the most popular routes from Chicago to London?

What are the most reliable airlines from Chicago to London?

What are the cheapest flights from Chicago to London?

Where are the most common layover locations when flying from Chicago to London?

What are some popular things to do or see while on a layover in Reykjavik?

What are some popular points of interest to see during a layover in Copenhagen?

Where are the least popular layover locations for Chicago to London flights?

Can I find deals for flights from Chicago to London that include hotel bookings?

How can I find direct flights from Chicago to London?

Can I find deals for business class flights from Chicago to London?

What is the cheapest month to book a flight from Chicago to London?

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Cheapest flights from Chicago to London
Explore the most affordable flight options available from Chicago to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2025.