£336 Find Cheap Flights from London Heathrow Airport to Philadelphia – Compare and Save

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

• Earliest: departs at 10:35 and lands at 18:43
• Latest: departs at 13:10 and lands at 21:18.

The flight takes about 8h 08m.

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

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

Prices vary by airline.

A direct flight from London Heathrow Airport to Philadelphia takes 8h 08m, covering 3,533 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.

Return flights from London Heathrow Airport to Philadelphia range from £600 to £818, with an average of £693 over the past 12 months. Anything below £600 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 14% above the £693 route average. Book 18 weeks before departure for the lowest fares.

On this route, stopover flights are cheaper than direct options on average. Stopover fares average £556 return via Washington, D.C. Dulles Intl (IAD), compared with £702 for direct.

There is no standard. Checked bag policies vary by airline on this route. Most carriers charge £55–£75 for the first checked bag in Economy. Premium fares and elite status bookings typically include a free checked bag.

The Airbus A350-1000 family is used most often on this route, operated mainly by British Airways and Finnair. Other aircraft seen on the route include Boeing 787-9 Dreamliner variants.

Morning is the busiest departure period on London Heathrow Airport to Philadelphia flights, with 50% leaving in that window. Afternoon departures account for 50%, Evening flights for 0%, and Night flights for 0%.

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

One-way fares from London Heathrow Airport to Philadelphia are currently lower than usual. Average one-way flight prices are about £410, which is 30% below the typical average for this route.

Philadelphia Airport (PHL) hosts 5 major car hire companies, with daily rates starting from around £21 for economy cars. Top options include:

• Payless
• Dollar
• Hertz
• Thrifty
• Alamo

Flights from London Heathrow Airport to Philadelphia usually depart from London Heathrow (LHR) and arrive at Philadelphia (PHL).

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 Heathrow Airport to Philadelphia route, 16% of flights were delayed in the past three months, with delays averaging 2h 28m.

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

• Dublin (DUB) – 68% of one-stop connections
• Boston Logan Intl (BOS) – 27% of one-stop connections
• Montreal Pierre Elliott Trudeau Intl (YUL) – 3% of one-stop connections
• Frankfurt am Main (FRA) – 1% of one-stop connections

Yes. Flexible dates can save you up to 11% on flights from London Heathrow Airport to Philadelphia. Tuesday is the cheapest departure day at £650 return on average, while Sunday is the most expensive at £727, a difference of £77.

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

2 airlines operate flights between London Heathrow Airport and Philadelphia. The airlines offering direct flights on this route include:

• American Airlines
• British Airways

Flying via Dublin (DUB) gives the shortest average 1-stop total travel time of 10h 53m, compared to 11h 47m via Frankfurt am Main (FRA) and 11h 58m via Washington, D.C. Dulles Intl (IAD).

Philadelphia is 4 hours behind London Heathrow Airport (Eastern Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Philadelphia are Philadelphia Convention Center, Rittenhouse Square, and Pennsylvania Convention Center. These are among the most viewed places in Philadelphia on KAYAK.

Among airlines operating London Heathrow Airport to Philadelphia flights:

• Finnair: offers free seat selection
• Iberia: offers free seat selection
• American Airlines: offers free seat selection
• Aer Lingus: 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
• Finnair: a cabin bag and a checked bag in Economy class
• Iberia: a cabin bag and a checked bag in Economy class

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

Iberia is a great airline for Unaccompanied Minor travel services as they not only guide children between 5 and 11 years, which is mandatory, but they also extend the service to young flyers between 12 and 17 years. This offers great peace of mind for parents as children are collected at London Heathrow Airport (LHR), monitored during flights and stopovers and dropped off with the appropriate guardian at Philadelphia International Airport (PHL).

If you book with Qatar Airways, you can guarantee a delicious, nutritious and appropriately-prepared religious meal when booked from the Special Meals Menu 24 hours ahead of flight time. This will include Kosher and Muslim meals as well as Jain and Hindu. You can also get the meals in vegan and vegetarian variations.

You will have no hassle getting your service dog in the cabin with any of the airline carriers servicing this flight. However, the animal will need to be harnessed for the duration of the flight. You will also need to ensure you book it in at the same time as your ticket booking, provide a valid training certificate and a clean bill of health.

Airlines will request that you book in your Mobility Assistance needs 48 hours before take-off by filling out a medical request form to help them prepare for your needs. British Airways arranges a pre-determined meeting spot in the airport, guides you through Security, boarding, and luggage or mobility devices storage. During the flight, there will be crew to assist with explanation of safety instructions, mobility to and from restrooms and assistance with food packaging. No airline will administer medication.