Question 1

What are the cheapest airlines flying from London Heathrow Airport to Chicago O'Hare Intl Airport round-trip?

Accepted Answer

Our cheapest airline available from London Heathrow Airport to Chicago O'Hare Intl Airport is Delta. Our recent data shows that you can find tickets from as low as £411 on this airline. Additional options worth looking into are Lufthansa and KLM, starting at £412 and £413 round-trip. Users have found that Delta is 24% cheaper than the other options available to this destination.

Question 2

What are the cheapest airlines to fly from London Heathrow Airport to Chicago O'Hare Intl Airport one-way?

Accepted Answer

£381 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on TAP AIR PORTUGAL and Scandinavian Airlines, with prices starting from £386 and £400, respectively.

Question 3

How far ahead should I book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

Accepted Answer

The best time to book flights from London Heathrow Airport to Chicago O'Hare Intl Airport is 85 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.

Question 4

What is the cheapest month to book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport (average of £595). Flying from London Heathrow Airport to Chicago O'Hare Intl Airport in July is currently the most expensive (average of £843). 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.

Question 5

What is the cheapest day to fly from London Heathrow Airport to Chicago O'Hare Intl Airport?

Accepted Answer

Travellers seeking maximum savings on their London Heathrow Airport to Chicago O'Hare Intl Airport flight should consider departing on Monday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

Weekly flight availability from London Heathrow Airport to Chicago O'Hare Intl Airport

Accepted Answer

The most flights from LHR to ORD are scheduled on a Monday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (48 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in Chicago O'Hare Intl Airport ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Chicago O'Hare Intl Airport when rainfall is around 43.0 mm.

Question 8

E

Accepted Answer

If weather is an important factor for your trip to Chicago O'Hare Intl Airport, 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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

Question 9

What are the cheapest flights from London Heathrow Airport to Chicago O'Hare Intl Airport?

Accepted Answer

While on average a flight from London Heathrow Airport to Chicago O'Hare Intl Airport is generally £1,784, our data shows the cheapest flight currently is £373. When looking at the most popular route, (London Heathrow - Chicago O'Hare Intl), you can expect to pay £325 for that flight.

Question 10

What are the most reliable airlines from London Heathrow Airport to Chicago O'Hare Intl Airport?

Accepted Answer

The top 3 most reliable airlines when flying from London Heathrow Airport to Chicago O'Hare Intl Airport are Air Canada (92%), Austrian Airlines (92%) and United Airlines (92%).

Question 11

What are the most popular airlines that fly from London Heathrow Airport to Chicago O'Hare Intl Airport?

Accepted Answer

The most popular airlines flying from London Heathrow Airport to Chicago O'Hare Intl Airport are American Airlines, Air Canada and Finnair. Something to consider prior to booking your flight.

Question 12

What is the cheapest day to fly round-trip from London Heathrow Airport to Chicago O'Hare Intl Airport?

Accepted Answer

Users have found that flying from London Heathrow Airport to Chicago O'Hare Intl Airport on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

Question 13

How far in advance should I book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

Accepted Answer

Travelers have found it’s best to book a flight 45 days in advance to save up to 25% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 45 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London Heathrow Airport to Chicago O'Hare Intl Airport 1-2 weeks in advance for as low as £520, or £612 for flights within the next 24 hours.

Question 14

What is the cheapest month to fly from London Heathrow Airport to Chicago O'Hare Intl Airport?

Accepted Answer

February is one of the best times of the year to fly to Chicago O'Hare Intl Airport from London Heathrow Airport. Prices for February average £520 per person but you can even find prices for as low as £316. The most expensive prices can be found in the month of August. Opting for a February flight can save you 27% on your journey compared to booking in August

Question 15

What is the cheapest time of day to fly from LHR to ORD?

Accepted Answer

It’s typically best to fly out from London Heathrow Airport to Chicago O'Hare Intl Airport in the evening. Doing so could potentially save you 16% on the flight price compared to flying in the afternoon, which is usually more expensive.

Question 16

Can I find deals for flights from Heathrow to O'Hare Intl that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Heathrow to O'Hare Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 17

How can I find direct flights from Heathrow to O'Hare Intl?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to O'Hare Intl.

Question 18

Can I find deals for business class flights from Heathrow to O'Hare Intl?

Accepted Answer

Yes. Cheapflights offers flight deals from Heathrow to O'Hare Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 19

How does Cheapflights help users find flights from Heathrow to O'Hare Intl?

Accepted Answer

Deals for Heathrow to O'Hare Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Question 20

Why should you use Cheapflights to find cheap flight tickets from Heathrow to O'Hare Intl?

Accepted Answer

Cheapflights helps you find that perfect flight to O'Hare Intl from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Question 21

Can Cheapflights find flights from Heathrow to O'Hare Intl with no change fees?

Accepted Answer

Certainly. Search results for flights to O'Hare Intl from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Question 22

Can Cheapflights notify me if prices for flights from Heathrow to O'Hare Intl become cheaper?

Accepted Answer

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

Round-trip from	£411
One-way from	£381
Popular in	July
Cheapest in	February
Average price	£562
Good round-trip deal	£472 or less
Good one-way deal	£449 or less

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£340	Average£472	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£350	Average£496	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£363	Average£599	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Virgin Atlantic	Cheapest£381	Average£528	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Brussels Airlines	Cheapest£389	Average£629	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Austrian Airlines	Cheapest£397	Average£560	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Lufthansa	Cheapest£397	Average£569	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£398	Average£566	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
American Airlines	Cheapest£400	Average£620	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
British Airways	Cheapest£404	Average£563	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

Cheap flights from London Heathrow Airport to Chicago O'Hare Intl Airport from £381

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London Heathrow to Chicago O'Hare Intl are usually found in February or September, booked 85 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Heathrow to O'Hare Intl

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Find flight deals from Heathrow to O'Hare Intl

Cheapest flights from Heathrow to O'Hare IntlExplore the most affordable flight options available from Heathrow to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Explore the most affordable flight options available from Heathrow to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Chicago O'Hare Intl Airport that are best for you.

Best time to book a flight from Heathrow to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Heathrow with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Chicago O'Hare Intl Airport

How far ahead should I book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

Use this chart to determine the optimal time to book a return flight from Heathrow to O'Hare Intl. Price data was last updated on 9 June 2025.

What is the cheapest month to book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

What is the cheapest time of day to fly from LHR to ORD?

Find hourly flight availability from Heathrow to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 June 2025.

What is the cheapest day to fly from London Heathrow Airport to Chicago O'Hare Intl Airport?

Use this chart to determine the cheapest time to fly return from Heathrow to O'Hare Intl. Price data was last updated on 8 June 2025.

Weekly flight availability from London Heathrow Airport to Chicago O'Hare Intl Airport

Explore weekly flight availability from Heathrow to O'Hare Intl. 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 13 June 2025.

Rainfall in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average rainfall totals by month.

Temperature in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average temperature totals by month.

Reviews of airlines servicing O'Hare Intl

See what other customers who have flown with Delta, KLM and Austrian Airlines from London to Chicago have to say. Users can see the overall rating for each airline as well as how each is rated 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 Heathrow to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from London Heathrow Airport to Chicago O'Hare Intl Airport round-trip?

What are the cheapest airlines to fly from London Heathrow Airport to Chicago O'Hare Intl Airport one-way?

What are the most reliable airlines from London Heathrow Airport to Chicago O'Hare Intl Airport?

What are the cheapest flights from London Heathrow Airport to Chicago O'Hare Intl Airport?

Can I find deals for flights from Heathrow to O'Hare Intl that include hotel bookings?

How can I find direct flights from Heathrow to O'Hare Intl?

Can I find deals for business class flights from Heathrow to O'Hare Intl?

What is the cheapest month to book a flight from London Heathrow Airport to Chicago O'Hare Intl Airport?

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Fly from Heathrow to O'Hare Intl on these airlines

Choose from the following airlines for your flight from Heathrow to O'Hare Intl. Flights are based on user searches made on Cheapflights and were last updated on 13 June 2025.

Top 10 airlines flying from Heathrow to O'Hare Intl

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Why should you use Cheapflights to find cheap flight tickets from Heathrow to O'Hare Intl?

Can Cheapflights find flights from Heathrow to O'Hare Intl with no change fees?

Can Cheapflights notify me if prices for flights from Heathrow to O'Hare Intl become cheaper?

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Cheapest flights from Heathrow to O'Hare Intl
Explore the most affordable flight options available from Heathrow to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.