C$ 451 Find Cheap Flights from Chicago to London – Compare and Save

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

• 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.

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

• Economy Class
• Premium Economy Class
• Business Class

A direct flight from Chicago O'Hare Intl Airport to London Heathrow Airport takes 8h 02m, covering 10,202 km.

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 O'Hare Intl Airport to London Heathrow Airport range from C$ 961 to C$ 1,562, with an average of C$ 1,195 over the past 12 months. Anything below C$ 961 counts as a good deal.

Last-minute fares on this route – booked within 2 weeks of departure – run 0% below the route average of C$ 1,195. Booking late can sometimes save money on this route, but inventory is limited.

On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 868 round-trip via Paris Charles de Gaulle (CDG), compared to C$ 1,260 for direct.

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 O'Hare Intl Airport to London Heathrow Airport flights are:

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

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

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 40–C$ 141 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

The Boeing 787-9 Dreamliner family is used most often on this route, operated mainly by Iberia and British Airways. Other aircraft seen on the route include Boeing 777 variants.

Evening is the busiest departure period on Chicago O'Hare Intl Airport to London Heathrow Airport flights, with 57% 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 O'Hare Intl Airport 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 O'Hare Intl Airport to London Heathrow Airport are currently lower than usual. Average one-way flight prices are about C$ 461, which is 35% below the typical average for this route.

London Heathrow Airport (LHR) hosts 5 major car rental companies, with daily rates starting from around C$ 10 for economy cars. Top options include:
• GREEN MOTION
• DRIVALIA
• Europcar
• Alamo
• Hertz

Flights from Chicago O'Hare Intl Airport to London Heathrow Airport usually depart from Chicago O'Hare Intl (ORD) and arrive at London Heathrow (LHR).

Afternoon 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.

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 O'Hare Intl Airport to London Heathrow Airport route, 23% of flights were delayed in the past 3 months, with delays averaging 2 hours 40 minutes.

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

• Reykjavik Keflavik Intl (KEF) – 36% of one-stop connections
• Dublin (DUB) – 36% of one-stop connections
• Lisbon Humberto Delgado (LIS) – 7% of one-stop connections
• Kastrup Copenhagen (CPH) – 7% 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 18% on the Chicago O'Hare Intl Airport to London Heathrow Airport route. Tuesday is the cheapest departure day at C$ 1,107 round-trip on average, while Saturday is the most expensive at C$ 1,343, a difference of C$ 236. 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 O'Hare Intl Airport and London Heathrow Airport. The airlines offering direct 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 13m via Dublin (DUB) and 11h 36m via Montreal Pierre Elliott Trudeau Intl (YUL).

London Heathrow Airport is 6 hours ahead of Chicago O'Hare Intl Airport (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 Trafalgar Square, Hyde Park, and London Eye. These are among the most viewed places in London Heathrow Airport on KAYAK.

Among airlines operating Chicago O'Hare Intl Airport to London Heathrow Airport 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 carry-on bag and a checked bag in Economy Class
• United Airlines: a carry-on bag and a checked bag in Economy Class
• American Airlines: a carry-on bag and a checked bag in Economy Class

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