Chicago to London Flight Time & Schedules

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How Long to Fly from Chicago to London?

Wondering how long to fly from Chicago to London? A nonstop flight from Chicago to London usually takes around 7 hrs 45 mins to 8 hrs 30 mins. Flight duration can vary depending on weather conditions, wind direction, aircraft type, and the selected route.

Flights from Chicago O’Hare International Airport (ORD) to London Heathrow Airport (LHR) are generally fastest when booked nonstop. Other London airports may appear in connecting itineraries, but Heathrow is the main airport commonly used for nonstop flights on this route.

Chicago and London are in different time zones. London is usually 6 hours ahead of Chicago, although the difference may briefly change during daylight saving time transitions.

For the quickest journey, compare nonstop Chicago to London flights, departure times, airfares, baggage allowances, and airline services before booking.

Chicago to London Flight Time by Airport

The average Chicago to London flight time depends on your departure airport, arrival airport, airline, aircraft type, weather, wind direction, and flight path. Most nonstop flights from Chicago O’Hare to London Heathrow take around 7 hours 45 minutes to 8 hours 30 minutes.

London Heathrow Airport (LHR) is the main and most practical arrival airport for travelers flying directly from Chicago. O’Hare currently offers nonstop Heathrow services, while London Gatwick and London City are optional alternatives that normally require a connecting flight

Departure Airport	Arrival Airport	Estimated Flight Time	Travel Tip
Chicago O’Hare International Airport (ORD)	London Heathrow Airport (LHR)	Around 7 hrs 45 mins–8 hrs 30 mins nonstop	The most practical option for London. Nonstop flights are available, and Heathrow provides convenient transport to central London and connections across the UK.
Chicago O’Hare International Airport (ORD)	London Gatwick Airport (LGW)	Around 10 hrs 30 mins–15 hrs or more with 1 stop	Gatwick is an optional airport and usually requires a connection from Chicago. Consider it mainly for South London, Brighton, or when the fare is significantly better.

For the quickest journey, a nonstop flight from Chicago O’Hare to London Heathrow is normally the best choice. Gatwick and London City should be treated as optional airports because connecting time and ground transportation can make the overall journey longer.

Best Airlines Flying from Chicago to London

United Airlines

American Airlines

British Airways

Aer Lingus

What is the Average Flight Time from Chicago to London?

Direct flights from Chicago to London run about 7 hours 50 minutes depending on your routing. Flying via major hubs can add time, but sometimes those tickets cost $150 to $300 less.

United Airlines, American Airlines operate regular service from Chicago O'Hare International Airport. Nonstop options work best for business travelers.

Layovers in hub cities typically last 2 to 4 hours. Longer connections can push total travel time up, but those fares often come in cheaper. Worth checking both options.

London is 6 hours ahead of Chicago. Factor this into meeting schedules.

Eastbound flights run throughout the day. The daytime schedule works well for making the most of travel time.

Booking at least 6 to 8 weeks out usually gets the best fares. Summer months and holidays tend to be pricier, so plan accordingly.

Most Asked Questions About Chicago to London Flight Time

How long is the flight from Chicago to London?

What is the time difference between Chicago and London?

Which airlines fly from Chicago to London?

How far is it from Chicago to London?

Are there direct flights from Chicago to London?

Explore More Flight Times & Routes

Planning beyond this route? Explore more flight times, distances, and travel durations using our tools below.

Start with our Flight Time Calculator to estimate journey times worldwide, or browse average travel times from your departure city using the Chicago Flight Times.