$302 Find Cheap Flights from Chicago to London - Compare and Save

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

• Earliest: departs at 3:45 pm and lands at 11:47 pm
• Latest: departs at 10:50 pm and lands at 6:52 am.

The flight takes about 8h 02m.

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

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

Prices vary by airline.

A nonstop flight from Chicago to London takes 8h 02m, covering 3,945 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 range from $669 to $1,101, with an average of $839 over the past 12 months. Anything below $669 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 0% above the $839 route average. Book 5 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $480 round-trip via Paris Charles de Gaulle (CDG), compared to $891 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 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 $28–$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 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 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 are currently lower than usual. Average one-way flight prices are about $309, which is 37% below the typical average for this route.

Since London is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
Near London Heathrow Airport (LHR) — daily rates from around $7:

• GREEN MOTION
• DRIVALIA
• Europcar
• Alamo
• Hertz

Near London Gatwick Airport (LGW) — daily rates from around $8:

• GREEN MOTION
• DRIVALIA
• U-Save
• Europcar
• Alamo

Near London City Airport (LCY) — daily rates from around $11:

• GREEN MOTION
• Budget
• Hertz
• Avis
• Sixt

Near London Luton Airport (LTN) — daily rates from around $11:

• GREEN MOTION
• DRIVALIA
• Alamo
• Europcar
• Budget

Near London Stansted Airport (STN) — daily rates from around $10:

• GREEN MOTION
• DRIVALIA
• Europcar
• Alamo
• U-Save

Flights from Chicago to London may depart from several airports in Chicago area, including Chicago Midway (MDW), Chicago O'Hare Intl (ORD) and Chicago Greater Rockford (RFD), with arrivals available at London area airports such as London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN).

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 route, 23% of flights were delayed in the past 3 months, with delays averaging 2h 40m.

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

• Reykjavik Keflavik Intl (KEF) - 44% of one-stop connections
• Dublin (DUB) - 29% of one-stop connections
• Lisbon Humberto Delgado (LIS) - 7% of one-stop connections
• Kastrup Copenhagen (CPH) - 6% of one-stop connections

Yes. Flexible dates can save you up to 18% on flights from Chicago to London. Tuesday is the cheapest departure day at $781 round-trip on average, while Saturday is the most expensive at $948, a difference of $167.

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. The airlines offering nonstop flights on this route include:

• United Airlines
• American Airlines
• British Airways

Flying via Cincinnati Cinci./N. Kentucky (CVG) gives the shortest average 1-stop total travel time at 11h 02m, compared with 11h 14m via Dublin (DUB) and 11h 17m via Amsterdam Schiphol (AMS).

London is 6 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 are Hyde Park and Buckingham Palace. These are among the most viewed places in London on KAYAK.

Among airlines operating Chicago to London flights:

• British Airways: offers extra legroom; offers free seat selection
• United Airlines: offers extra legroom; offers free seat selection
• American 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
• United Airlines: a cabin bag and a checked bag in Economy Class
• American 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.

London Heathrow Airport (LHR) offers several transportation options. Buses run from the bus station, a short walk from Terminals 2 and 3 and some also stop outside Terminals 4 and 5. Services from various companies extend to downtown London, west London, railway stations and many more destinations. Rail options include the Heathrow Express to Paddington Station, with trains every 15 minutes and the Elizabeth line. Another rail option is the London Underground or Tube, to Piccadilly. Taxis and rental cars are also available at LHR.

London Gatwick Airport (LGW) provides detailed access guides for its terminals, car parks and train station. Reserved parking spots are available and lifts and ramps are in place throughout the airport. Unisex accessible toilets are located throughout the airport for wheelchair users. Special help points with telephones are also available for passengers with disabilities who need assistance. LGW also has a one-of-a-kind sensory room that provides a calming and relaxing environment for passengers with disabilities such as autism and dementia.