Cheap flights from Chicago to London from $193
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 11/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Chicago to London
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
TAP AIR PORTUGAL flights from Chicago to London Heathrow Airport
Our best TAP AIR PORTUGAL deals on Chicago to London Heathrow Airport flight tickets
Icelandair flights from Chicago to London Heathrow Airport
Our best Icelandair deals on Chicago to London Heathrow Airport flight tickets
See travel insights to London from
How to get the cheapest flight ticket from Chicago 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 cheapest month to fly to London Heathrow Airport?
The month of November is, on average, the cheapest month to fly to London Heathrow Airport from Chicago, with most prices found around $657. If you’re not able to fly to London Heathrow Airport in November, then April is your next best option. Flight prices from Chicago to London Heathrow Airport during April average around $669.
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 $760. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $883.
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 to London Heathrow Airport in the morning for as low as $701. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $822.
What is the cheapest Chicago to London Heathrow flight route?
Fly from Chicago O'Hare Intl to London Heathrow for the best Chicago - 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 when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $803 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Chicago for as low as $712 on momondo.
What cabin class options are available on Chicago to London Heathrow flights?
There are 4 cabin classes available to choose from on Chicago 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 to London Heathrow Airport flights?
You could potentially save up to 24% on your flight if you consider stops on a Chicago to London Heathrow Airport flight.
How have Chicago to London Heathrow Airport flight prices changed over time?
As of June 2025, prices for Chicago to London Heathrow Airport flights are approximately 38% more expensive when compared to flights at the same time last year.
What is the cheapest airline that flies from Chicago to London Heathrow?
Icelandair, TAP AIR PORTUGAL, and JetBlue are the most popular carriers operating from Chicago 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 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 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 to London Heathrow Airport on average per day?
As of June 2025, there are 54 flights per day flying from Chicago to London Heathrow Airport. The most common time of day flights depart is 9:00PM, with 65% of flights taking off in the evening.
How many flights depart from Chicago to London Heathrow Airport on average per week?
As of June 2025, there are 379 flights per week flying from Chicago to London Heathrow Airport. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.
When to book flights from Chicago to London Heathrow Airport
Cheap Chicago to London Heathrow Airport (CHI to LHR) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Chicago to London Heathrow Airport
How far is Chicago to London Heathrow by plane?
There are 3933.5 mi between Chicago and London Heathrow. A reasonable flight in good conditions will take 7h 40m.
When did momondo last update prices for flights from Chicago to London Heathrow Airport?
Prices for flights from Chicago to London Heathrow Airport refresh daily.
How many operators does momondo search for flights from Chicago to London Heathrow Airport?
The number of operators available for flights from Chicago to London Heathrow Airport is 15 as of June 2025.
How old do you have to be to fly from Chicago to London Heathrow Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago 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 to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Chicago to London Heathrow Airport is Boeing 787-9 Dreamliner (41.61% of total bookings). The next most popular plane models are Boeing 787-10 Dreamliner (18.65%), Boeing 777 (18.58%), and Boeing 767-300 (12.31%).
What is the most popular airline from Chicago to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Chicago to London Heathrow Airport is British Airways (30% of total bookings). The next most popular airlines are Iberia (21%), American Airlines (13%), and United Airlines (13%).
Best airlines flying from Chicago to London Heathrow Airport
Compare and see reviews for airlines that fly from Chicago to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $257 | Free Cancellation | Rating 7.5 1,623 reviews | |||
| PriceFrom $345 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $381 | Free Cancellation | Rating 7.3 1,387 reviews | |||
| PriceFrom $440 | Free Cancellation | Rating 6.7 7,139 reviews | |||
| PriceFrom $465 | Free Cancellation | Rating 7.0 499 reviews | |||
| PriceFrom $507 | Free Cancellation | Rating 7.1 1,885 reviews | |||
| PriceFrom $516 | Free Cancellation | Rating 7.3 2,925 reviews | |||
| PriceFrom $554 | Free Cancellation | Rating 7.1 9,537 reviews | |||
| PriceFrom $567 | Free Cancellation | Rating 7.6 1,290 reviews | |||
| PriceFrom $569 | Free Cancellation | Rating 7.1 1,117 reviews |
Alaska Airlines Flights From Chicago to London Heathrow Airport
Alaska Airlines operates around 37 flights from Chicago 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 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 to London Heathrow Airport
Finnair (7.6/10 from 1,290 reviews) operates around 33 flights from Chicago to London Heathrow Airport in any given week. The average Finnair airfare for this route is around $745, with deals from around $567 rare but found on momondo. Referenced prices are for round-trip Chicago to London Heathrow Airport flight searches in the last 72 hours.
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?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Chicago.
Can I find flights from Chicago to London with flexible booking policies on momondo?
Flights from Chicago to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
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 not ready to book a flight from Chicago to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.