$320 Find Cheap Flights from Chicago to London Heathrow Airport - Compare and Save

These are the earliest and latest flight times available from Chicago to London Heathrow Airport:

• Earliest: departs at 3:45 pm and lands at 11:44 pm
• Latest: departs at 10:50 pm and lands at 6:49 am.

The flight takes about 7h 59m.

Four cabin classes are available on flights from Chicago to London Heathrow Airport:

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

A nonstop flight from Chicago to London Heathrow Airport takes 7h 59m, covering 3,933 miles.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Round-trip flights from Chicago to London Heathrow Airport range from $714 to $1,160, with an average of $892 over the past 12 months. Anything below $714 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 6% above the $892 route average. Book 21 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $614 round-trip via Paris Charles de Gaulle (CDG), compared to $943 for nonstop.

American Airlines is slightly above the route average for timely arrivals, while British Airways has a lower on-time arrival rate. On-time arrival rates on Chicago to London Heathrow Airport flights are:

• American Airlines: 78% on time
• British Airways: 78% on time
• United Airlines: 75% on time

Overall, flights on this route are punctual 77% of the time on average.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $35–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

Evening is the busiest departure period on Chicago to London Heathrow Airport flights, with 57% of flights leaving in that window. Night departures account for 28%, afternoon flights for 14%, and morning flights for 1%.

Four airlines offer in-flight Wi-Fi on Chicago to London Heathrow Airport flights:

• British Airways
• American Airlines
• Iberia
• Finnair

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.

One-way fares from Chicago to London Heathrow Airport are currently lower than usual. Average one-way flight prices are about $322, which is 36% below the typical average for this route.

London Heathrow Airport (LHR) hosts 5 major car rental companies, with daily rates averaging $39 for economy cars. Top options include:

• GREEN MOTION
• DRIVALIA
• Europcar
• Alamo
• Hertz

Flights from Chicago to London Heathrow Airport may depart from several airports in Chicago area, including Chicago Midway (MDW), Chicago O'Hare Intl (ORD) and Chicago Greater Rockford (RFD). Flights usually arrive at London Heathrow (LHR).

Afternoon flights have the fewest delays on this route, while night departures tend to have the most.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Chicago to London Heathrow Airport route, 23% of flights were delayed in the past 3 months, with delays averaging 2h 40m.

One-stop flights from Chicago to London Heathrow Airport most commonly connect through:

• Reykjavik Keflavik Intl (KEF) - 37% of one-stop connections
• Dublin (DUB) - 33% of one-stop connections
• Kastrup Copenhagen (CPH) - 8% of one-stop connections
• Lisbon Humberto Delgado (LIS) - 7% of one-stop connections

Yes. Flexible dates can save you up to 15% on flights from Chicago to London Heathrow Airport. Tuesday is the cheapest departure day at $848 round-trip on average, while Saturday is the most expensive at $987, a difference of $139.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

3 airlines operate flights between Chicago and London Heathrow Airport. The airlines offering nonstop flights on this route include:

• United Airlines
• British Airways
• American Airlines

Flying via Cincinnati Cinci./N. Kentucky (CVG) gives the shortest average 1-stop total travel time at 11h 02m, compared with 11h 18m via Dublin (DUB) and 11h 21m via Montreal Pierre Elliott Trudeau Intl (YUL).

London Heathrow Airport is 5 hours ahead of Chicago (British Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in London Heathrow Airport are Hyde Park and Buckingham Palace. These are among the most viewed places in London Heathrow Airport on KAYAK.

Among airlines operating Chicago to London Heathrow Airport flights:

• British Airways: offers extra legroom; offers free seat selection
• American Airlines: offers extra legroom; offers free seat selection
• United Airlines: offers extra legroom; offers free seat selection
• Iberia: offers free seat selection
• Finnair: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• British Airways: a cabin bag and a checked bag in Economy Class
• American Airlines: a cabin bag and a checked bag in Economy Class
• United Airlines: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

There are a couple of places in the airport where you can enjoy currency exchange. Look for currency exchange centers in Terminals 2, 3, 4, and 5. There is also a branch of Barclays, Lloyds, and HSBC banks inside the airport terminals.

If you have a late arrival or your plane is delayed, you'll be happy to know that there is a hotel at the airport. The Aerotel T3 London Heathrow is located in Terminal 3. You can rent a room by the hour or the day.

At Chicago Midway Airport (MDW) there is a yoga room where you can meditate and relax. If you fly into the Chicago O'Hare Airport (ORD), there are a few spas where you can get a chair massage or another spa or beauty service.

The public transportation system in London is very advanced. You'll have the option of taking the tube (subway) or train (light rail) into the city. The subway station is located in Terminal 4 and it will take about 50min to get to the heart of the city. There is also an express train that goes to many areas in the city including London's Westminster borough. The Heathrow Express takes about 20min to get to the London Picadilly Station. The train picks up passengers at Terminals 2, 3, and 5.