Cheap flights from London Heathrow Airport to Chicago from £251
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Chicago departing on 8/9. 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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TAP AIR PORTUGAL flights from London Heathrow Airport to Chicago O'Hare Intl Airport
Our best TAP AIR PORTUGAL deals on London Heathrow Airport to Chicago O'Hare Intl Airport flight tickets
British Airways flights from London Heathrow Airport to Chicago O'Hare Intl Airport
Our best British Airways deals on London Heathrow Airport to Chicago O'Hare Intl Airport flight tickets
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How to get the cheapest flight ticket from London Heathrow Airport to Chicago O'Hare Intl 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 Chicago O'Hare Intl Airport?
The cheapest month to fly to Chicago O'Hare Intl Airport from London Heathrow Airport is in February. Flight prices, which tend to average around £444, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Chicago O'Hare Intl Airport from London Heathrow Airport during September instead. Flights to Chicago O'Hare Intl Airport in September, while not as cheap as those in February, still average around £496.
What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?
The cheapest day to depart from London Heathrow Airport to Chicago O'Hare Intl Airport is on a Wednesday. Travellers who choose to depart for Chicago O'Hare Intl Airport on a Wednesday will often find tickets for as low as £605. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Chicago O'Hare Intl Airport on Sunday is £666.
What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?
The cheapest time of day to fly to Chicago O'Hare Intl Airport is in the evening when flights can be purchased for as low as £559. In contrast, the most expensive time of day to depart to Chicago O'Hare Intl Airport is in the afternoon when prices are around £664.
What is the cheapest London Heathrow to Chicago O'Hare Intl flight route?
Fly from London Heathrow to Chicago O'Hare Intl for the best London Heathrow - Chicago O'Hare Intl flight prices
How far in advance should I book a flight to Chicago O'Hare Intl Airport?
You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from London Heathrow Airport when booking 13 weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around £546 when searching 13 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from London Heathrow Airport for as low as £523 on momondo.
What cabin class options are available on London Heathrow to Chicago O'Hare Intl flights?
There are 4 cabin classes available to choose from on London Heathrow to Chicago O'Hare Intl 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 London Heathrow Airport to Chicago O'Hare Intl Airport flights?
No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Chicago O'Hare Intl Airport.
How have London Heathrow Airport to Chicago O'Hare Intl Airport flight prices changed over time?
As of June 2025, prices for London Heathrow Airport to Chicago O'Hare Intl Airport flights are approximately 7% more expensive when compared to flights at the same time last year.
What is the cheapest airline that flies from London Heathrow to Chicago O'Hare Intl?
TAP AIR PORTUGAL, Aer Lingus, and Scandinavian Airlines are the most popular carriers operating from London Heathrow to Chicago O'Hare Intl
Which airlines fly to Chicago O'Hare Intl Airport?
British Airways, Finnair and Lufthansa are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 62% of people opting to fly with this airline when travelling to Chicago O'Hare Intl Airport. Keep in mind that there are 16 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from London Heathrow Airport to Chicago O'Hare Intl Airport on average per day?
The number of flights available between London Heathrow Airport and Chicago O'Hare Intl Airport is 51 per day as of June 2025. The most frequent departure time is 14:00, with 53% of daily flights leaving in the afternoon.
How many flights depart from London Heathrow Airport to Chicago O'Hare Intl Airport on average per week?
362 flights are operational weekly from London Heathrow Airport to Chicago O'Hare Intl Airport 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 London Heathrow Airport to Chicago O'Hare Intl Airport
Cheap London Heathrow Airport to Chicago O'Hare Intl Airport (LHR to ORD) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Chicago O'Hare Intl Airport
How far is London Heathrow to Chicago O'Hare Intl by plane?
The distance between London Heathrow and Chicago O'Hare Intl is about 3939.2 mi. Flights usually cover this in 8h 25m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from London Heathrow Airport to Chicago O'Hare Intl Airport?
Prices for flights from London Heathrow Airport to Chicago O'Hare Intl Airport were last updated today.
How many operators does momondo search for flights from London Heathrow Airport to Chicago O'Hare Intl Airport?
The number of operators available for flights from London Heathrow Airport to Chicago O'Hare Intl Airport is 16 as of June 2025.
How old do you have to be to fly from London Heathrow Airport to Chicago O'Hare Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Chicago O'Hare Intl Airport.
What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?
The travel and health documents you'll need for your trip to Chicago O'Hare Intl 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 Chicago O'Hare Intl 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 London Heathrow Airport to Chicago O'Hare Intl Airport?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Chicago O'Hare Intl Airport is Boeing 767-300, representing 40.03% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 20.47%, Boeing 777 at 15.62%, and Boeing 777-300ER at 7.67%.
What is the most popular airline from London Heathrow Airport to Chicago O'Hare Intl Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from London Heathrow Airport to Chicago O'Hare Intl Airport is British Airways (47% of total bookings). The next most popular airlines are Finnair (11%), Lufthansa (11%), and Aer Lingus (7%).
Best airlines flying from London Heathrow Airport to Chicago O'Hare Intl Airport
Compare and see reviews for airlines that fly from London Heathrow Airport to Chicago O'Hare Intl Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £340 | Free Cancellation | Rating 7.0 499 reviews | |||
| PriceFrom £350 | Free Cancellation | Rating 7.3 1,387 reviews | |||
| PriceFrom £363 | Free Cancellation | Rating 7.1 1,887 reviews | |||
| PriceFrom £381 | Free Cancellation | Rating 7.4 652 reviews | |||
| PriceFrom £389 | Free Cancellation | Rating 7.4 355 reviews | |||
| PriceFrom £397 | Free Cancellation | Rating 7.6 802 reviews | |||
| PriceFrom £397 | Free Cancellation | Rating 6.7 7,139 reviews | |||
| PriceFrom £398 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom £400 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom £404 | Free Cancellation | Rating 6.6 7,011 reviews |
Austrian Airlines Flights From London Heathrow Airport to Chicago O'Hare Intl Airport
Austrian Airlines flight deals from London Heathrow Airport to Chicago O'Hare Intl Airport start from £539 round-trip. Over the 21 Austrian Airlines flights for this route in a normal week, average airfare is usually £761 round-trip - but some users have found much cheaper deals with momondo.
Finnair Flights From London Heathrow Airport to Chicago O'Hare Intl Airport
Another popular option for London Heathrow Airport to Chicago O'Hare Intl Airport flights is Finnair (7.6/10, 1,290 ratings). Finnair flies from London Heathrow Airport to Chicago O'Hare Intl Airport around 32 times per week, with deals starting from £600 round-trip and rising to an average price of around £789.
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Why should I use momondo to find a flight deal from London to Chicago?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Chicago. momondo saves you time and could save you money on your trip.
Can I find flights from London to Chicago with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Chicago from London with this policy.
How can momondo help me find flights from London to Chicago?
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 Chicago from London.
I’m not ready to book a flight from London to Chicago right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Chicago, momondo offers a useful price alert feature which will track prices for flights to Chicago from London and alert you when they change.