$473 Find Cheap Flights from London to Chicago - Compare and Save

These are the earliest and latest flight times available from London to Chicago O'Hare Intl Airport:

• Earliest: departs at 7:40 am and lands at 4:41 pm
• Latest: departs at 4:30 pm and lands at 1:31 am.

The flight takes about 9h 01m.

Four cabin classes are available on flights from London to Chicago O'Hare Intl Airport:

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

Prices vary by airline.

A nonstop flight from London to Chicago O'Hare Intl Airport takes 9h 01m, covering 3,951 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 London to Chicago O'Hare Intl Airport range from $671 to $1,045, with an average of $842 over the past 12 months. Anything below $671 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 12% above the $842 route average. Book 23 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $510 round-trip via Miami (MIA), compared to $908 for nonstop.

United Airlines is slightly above the route average for timely arrivals, while American Airlines has a lower on-time arrival rate. On-time arrival rates on London to Chicago O'Hare Intl Airport flights are:

• United Airlines: 95% on time
• American Airlines: 90% on time
• British Airways: 90% on time

Overall, flights on this route are punctual 92% of the time on average.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $56–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

Afternoon is the busiest departure period on London to Chicago O'Hare Intl Airport flights, with 57% of flights leaving in that window. Morning departures account for 43%, evening flights for 0%, and night flights for 0%.

American Airlines is the only airline on the London to Chicago O'Hare Intl Airport route offering in-flight Wi-Fi. Pricing depends on fare class.

One-way fares from London to Chicago O'Hare Intl Airport are currently lower than usual. Average one-way flight prices are about $495, which is 28% below the typical average for this route.

Chicago O'Hare Intl Airport (ORD) hosts 5 major car rental companies, with daily rates starting from around $17 for economy cars. Top options include:

• Routes Car & Truck Rentals
• Europcar
• Hertz
• Dollar
• Ace

Flights from London to Chicago O'Hare Intl Airport may depart from several airports in London area, including London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN). Flights usually arrive at Chicago O'Hare Intl (ORD).

Morning flights have the fewest delays on this route, while afternoon 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 London to Chicago O'Hare Intl Airport route, 8% of flights were delayed in the past 3 months, with delays averaging 2h 57m.

One-stop flights from London to Chicago O'Hare Intl Airport most commonly connect through:

• Reykjavik Keflavik Intl (KEF) - 45% of one-stop connections
• Dublin (DUB) - 23% of one-stop connections
• Kastrup Copenhagen (CPH) - 13% of one-stop connections
• Lisbon Humberto Delgado (LIS) - 10% of one-stop connections

Yes. Flexible dates can save you up to 8% on flights from London to Chicago O'Hare Intl Airport. Thursday is the cheapest departure day at $818 round-trip on average, while Sunday is the most expensive at $887, a difference of $69.

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 London and Chicago O'Hare Intl Airport. The airlines offering nonstop flights on this route include:

• United Airlines
• British Airways
• American Airlines

Flying via Amsterdam Schiphol (AMS) gives the shortest average 1-stop total travel time at 11h 02m, compared with 11h 10m via Dublin (DUB) and 11h 14m via Brussels Bruxelles-National (BRU).

Chicago O'Hare Intl Airport is 6 hours behind London (Central Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Chicago O'Hare Intl Airport are Magnificent Mile, Grant Park and Soldier Field. These are among the most viewed places in Chicago O'Hare Intl Airport on KAYAK.

Among airlines operating London to Chicago O'Hare Intl Airport flights:

• British Airways: offers free seat selection
• Finnair: offers free seat selection
• United Airlines: offers free seat selection
• Iberia: offers free seat selection
• American Airlines: 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
• Lufthansa: a cabin bag and a checked bag in Economy Class
• Finnair: 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.