$467 Find Cheap Flights from London Heathrow Airport to Chicago - Compare and Save

Among airlines operating London Heathrow Airport to Chicago flights:

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

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

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

• United Airlines
• American Airlines
• British Airways

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

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 travelers should check the fare details before booking.

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

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

Prices vary by airline.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $550 round-trip via Charlotte Douglas (CLT), compared to $908 for nonstop.

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.

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

• Reykjavik Keflavik Intl (KEF) - 34% of one-stop connections
• Dublin (DUB) - 29% of one-stop connections
• Kastrup Copenhagen (CPH) - 17% of one-stop connections
• Lisbon Humberto Delgado (LIS) - 12% of one-stop connections

Reykjavik Keflavik Intl (KEF) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 8% on the London Heathrow Airport to Chicago route. Thursday is the cheapest departure day at $828 round-trip on average, while Sunday is the most expensive at $900, a difference of $72. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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 Heathrow Airport to Chicago route, 9% of flights were delayed in the past 3 months, with delays averaging 3 hours 1 minute.

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

Some of the most popular sights in Chicago are Magnificent Mile, Grant Park and River North. These are among the most viewed places in Chicago on KAYAK.

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

• Earliest: departs at 7:40 am and lands at 4:39 pm
• Latest: departs at 4:30 pm and lands at 1:29 am.

The flight takes about 8h 59m.

Last-minute fares on this route - booked within 2 weeks of departure - run 12% above the route average of $855. Book 23 weeks before departure for the lowest fares.

A nonstop flight from London Heathrow Airport to Chicago takes 8h 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.

One-way fares from London Heathrow Airport to Chicago are currently lower than usual. Average one-way flight prices are about $492, which is 29% below the typical average for this route.

United 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 London Heathrow Airport to Chicago flights are:

• United Airlines: 95% on time
• British Airways: 90% on time
• American Airlines: 88% on time

Overall, flights on this route are on time 91% of the time on average.

Morning flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 10h 39m, compared with 11h 06m via Dublin (DUB) and 11h 10m via Amsterdam Schiphol (AMS).

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

Since Chicago is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
Near Chicago O'Hare Intl Airport (ORD) — daily rates from around $17:

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

Near Chicago Midway Airport (MDW) — daily rates from around $32:

• Hertz
• Dollar
• Budget
• Alamo
• Rent-A-Wreck

Near Chicago Greater Rockford Airport (RFD) — daily rates from around $30:

• Alamo
• Enterprise Rent-A-Car
• Budget
• Avis
• National

Round-trip flights from London Heathrow Airport to Chicago range from $686 to $1,057, with an average of $855 over the past 12 months. Anything below $686 counts as a good deal.

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