Tower Bridge over the River Thames in London on a sunny day

Cheap Flights from Chicago (ORD) to London (LHR)

  • About 3,942 miles
  • About 8.4 hours
  • Best months: May, Jun, Jul
Passengers & cabin

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London is calling, and Chicago travelers have plenty of options. Airlines on ORD to LHR include British Airways, American and United. Expect about 8.4 hours in the air and fares from $485 when you book at the right moment.

Tips for finding a lower fare

  • Try booking a Tuesday or Wednesday departure to London; those days are quieter on most carriers.
  • Use a fare calendar and look at a full month before choosing dates.
  • Compare the total trip cost, including bags and seat fees, not just the base fare to LHR.

Airlines on this route

British Airways, American, United

Things to see in London

  • Buckingham Palace
  • Borough Market

Frequently asked questions

When is the cheapest time to fly from Chicago to London?

Fares on ORD to LHR are often lower in May, Jun and Jul. Prices move with demand, so compare a few dates on the partner site before you decide.

How long is the flight from ORD to LHR?

A nonstop flight takes about 8.4 hours. Itineraries with a connection take longer, depending on the layover.

Which airlines fly from Chicago to London?

Carriers we commonly see on this route include British Airways, American and United. Schedules and availability change, so check current options when you search.

How far ahead should I book ORD to LHR?

For most domestic trips, booking about 1 to 3 months ahead gives a good balance of price and choice. Holiday travel is better booked earlier.

Is the price I see here the final price?

No. Fares shown on this page are indicative and change often. The final price, taxes and fees are shown on the partner site at booking.

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