Cheap flights from Chicago O'Hare Intl Airport to London from $198
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 7/9. 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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Icelandair 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 $649, 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 $652.
What is the cheapest day to depart on your flight to London?
The cheapest day to depart from Chicago O'Hare Intl Airport to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $760. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $883. 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 O'Hare Intl Airport in the morning is the least expensive time of day to depart. momondo users have found prices as low as $701 when looking at flights departing in the morning. Flights to London are more costly in the afternoon, with an average ticket price of $821. 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 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 $802 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 $711 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 22% 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
What airlines fly to London?
British Airways, Iberia and American Airlines 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 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 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 9:00PM, 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?
As of June 2025, 391 flights take off from Chicago O'Hare Intl Airport and land in London 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
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?
The straight-line distance from Chicago O'Hare Intl to London is 3950.9 mi. 7h 50m is a normal flight duration for this route.
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 refresh daily.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to London?
The number of operators available for flights from Chicago O'Hare Intl Airport to London is 17 as of June 2025.
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 offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify 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?
Based on momondo bookings for flights between Chicago O'Hare Intl Airport and London, the leading airline is Iberia, making up 25% of the total bookings. Other popular airlines include British Airways with 24%, American Airlines with 12%, and Icelandair with 10%.
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 $257 | Free Cancellation | Rating 7.5 1,628 reviews | |||
| PriceFrom $345 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $381 | Free Cancellation | Rating 7.3 1,388 reviews | |||
| PriceFrom $440 | Free Cancellation | Rating 6.8 7,148 reviews | |||
| PriceFrom $464 | Free Cancellation | Rating 7.0 499 reviews | |||
| PriceFrom $507 | Free Cancellation | Rating 7.1 1,890 reviews | |||
| PriceFrom $516 | Free Cancellation | Rating 7.3 2,922 reviews | |||
| PriceFrom $569 | Free Cancellation | Rating 7.6 1,292 reviews | |||
| PriceFrom $573 | Free Cancellation | Rating 7.1 1,118 reviews | |||
| PriceFrom $581 | Free Cancellation | Rating 7.0 2,778 reviews |
Alaska Airlines Flights From Chicago O'Hare Intl Airport to London
The lowest priced Alaska Airlines flight from Chicago O'Hare Intl Airport to London from the last 72 hours was $809. Generally, Alaska Airlines has 40 flights on this route every week with an average price of $973. Alaska Airlines is rated 8.0/10 by our users.
Finnair Flights From Chicago O'Hare Intl Airport to London
The best Finnair deal for Chicago O'Hare Intl Airport 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 $750 round-trip. Finnair operates 33 flights out of Chicago O'Hare Intl Airport into London in an average week, so prices vary by time and availability. 1,291 Finnair reviews by users on momondo have scored the airline at 7.6/10.
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Why should I use momondo to find a flight deal from Chicago to London?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Chicago to London. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Chicago to London with flexible booking policies on momondo?
momondo does allow users to show only those flights to London from Chicago which offer a flexible booking policy as well as other useful filters and features.
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?
Of course. momondo tracks the price of Chicago to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.