Cheap Flights from London (LON) to Chicago (CHI)

Frequently Asked Questions

• What are the cheapest flights from London to Chicago (LON-CHI)?

  Based on Trip.com data, Norse Atlantic Airways offers one-way fares as low as US$304 on Cheapest nonstop routes (e.g. LGW to ORD on Sat, May 9), while Icelandair offers Cheapest nonstop round-trips from US$475 departing on Mon, Apr 13 and returning on Fri, Apr 17.

• Which airlines offer direct flights from London to Chicago?

  At the moment, you can catch a nonstop flight from London to Chicago with the following airlines, including: American Airlines Lufthansa British Airways United Airlines Norse Atlantic Airways Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is a flight from London to Chicago?

  It takes about 9 hours 7 minutes to fly from London to Chicago.

• When is the best time to book flights from London to Chicago?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from London to Chicago is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from London to Chicago?

  Based on Trip.com data in the past 4 weeks, there is 47 flight per week flying from London to Chicago. You can check the weekly schedule for popular airlines on this route below: American Airlines: S/M/T/W/T/F/S -- AA7004 (11:28)

• How can I find the best deals on flights from London to Chicago?

  To find best deals on flights from London to Chicago, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, May 9, with one-way flights priced at just US$304.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Finnair.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for Chicago travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from London (LON) to Chicago (CHI) the cheapest?

  The cheapest months to fly from London to Chicago is November, when demand for travel is lower.

• Which upcoming date is cheapest to fly from London to Chicago on?

  After crunching the numbers on our March flight calendar, it's currently cheapest to fly from London to Chicago on March 18, 2026 with Norse Atlantic Airways, with prices starting at US$331.

• Which airports can I fly to for Chicago from London?

  You can land at any one of the following hubs in Chicago, with Heathrow Airport to O'Hare International Airport (LHR-ORD) is by far the most common option on this route: Midway International Airport (MDW) O'Hare International Airport (ORD) Chicago Rockford International Airport (RFD).

• Is there any time difference between London and Chicago?

  The time difference between Chicago and London is 6h.

• How do I change or cancel my ticket from London to Chicago?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.