LON - PHL

$414 Find Cheap Flights from London to Philadelphia - Compare and Save

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Everything you should know

Cheapest round-trip
$795
Typical prices: $807-$1,100
Scandinavian Airlines
Mon 1/22Tue 1/30
LHR - PHL • 3 stops
Cheapest non-stop
$865
Typical prices: $830-$1,121
Iberia
Fri 12/7Fri 12/14
LHR - PHL • Non-stop
Advice from real travelers
American Main Cabin Extra adds early boarding and free drinks on this long-haul route.
BA Premium Economy adds legroom; Iberia meals may feel light, so pack snacks.
Expert advice
+1
Expert advice
+1
Nonstop flights
You can fly direct with American Airlines and British Airways. Average duration is 8h 07m
Direct flights
+1
Direct flights
+1
Top routes
Cheapest • 6% average savings
Most popular
Insights
Insights
Avoid delays
Most punctual • 87% on-time
Best time • Fewest delays
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 18 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 16% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $745 (round-trip)
Shortest trip • 10h 49m (one-way)
Insights
Insights
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We hope you love your trip to Philadelphia!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from London to Philadelphia (LON-PHL)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from London to Philadelphia

Wed, Dec 2 - Mon, Dec 7
Scandinavian Airlines Logo
6:40 am - 12:52 amLHR  London Heathrow-PHL Philadelphia
23h 12m2 stops Kastrup Copenhagen Atlanta Hartsfield-Jackson
Scandinavian Airlines Logo
3:39 pm - 4:00 pmPHL  Philadelphia-LHR London Heathrow
19h 21m2 stops Atlanta Hartsfield-Jackson Kastrup Copenhagen
$795Scandinavian Airlines
Mon, Dec 7 - Mon, Dec 14
Air Canada Logo
6:00 am - 10:36 pmLHR  London Heathrow-PHL Philadelphia
21h 36m2 stops Zurich Toronto Pearson Intl
Air Canada Logo
9:15 am - 7:10 amPHL  Philadelphia-LHR London Heathrow
16h 55m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl
$796Air Canada
Thu, Jan 7 - Sun, Jan 10
Scandinavian Airlines Logo
6:40 am - 10:32 pmLHR  London Heathrow-PHL Philadelphia
20h 52m3 stops Stockholm Arlanda Kastrup Copenhagen Boston Logan Intl
Scandinavian Airlines Logo
7:05 am - 4:25 pmPHL  Philadelphia-LHR London Heathrow
28h 20m3 stops Boston Logan Intl Kastrup Copenhagen Oslo Gardermoen
$797Scandinavian Airlines
Tue, Jan 19 - Tue, Jan 26
British Airways Logo
6:30 am - 2:00 pmLHR  London Heathrow-PHL Philadelphia
12h 30m1 stop Dublin
British Airways Logo
9:25 pm - 4:35 pmPHL  Philadelphia-LHR London Heathrow
14h 10m1 stop Dublin
$840British Airways
Tue, Jan 19 - Tue, Jan 26
British Airways Logo
6:30 am - 2:00 pmLHR  London Heathrow-PHL Philadelphia
12h 30m1 stop Dublin
British Airways Logo
9:25 pm - 2:35 pmPHL  Philadelphia-LHR London Heathrow
12h 10m1 stop Dublin
$841British Airways
Tue, Jan 19 - Tue, Jan 26
British Airways Logo
6:30 am - 2:00 pmLHR  London Heathrow-PHL Philadelphia
12h 30m1 stop Dublin
British Airways Logo
7:40 pm - 7:50 amPHL  Philadelphia-LHR London Heathrow
7h 10mnonstop
$850British Airways
Mon, Feb 15 - Thu, Feb 18
American Airlines Logo
7:30 am - 3:50 pmLHR  London Heathrow-PHL Philadelphia
13h 20m1 stop Madrid Barajas
American Airlines Logo
10:30 am - 9:05 amPHL  Philadelphia-LHR London Heathrow
17h 35m1 stop Montreal Pierre Elliott Trudeau Intl
$863American Airlines
Mon, Dec 7 - Mon, Dec 14
Aer Lingus Logo
8:50 am - 4:10 pmLHR  London Heathrow-PHL Philadelphia
12h 20m1 stop Dublin
Aer Lingus Logo
5:40 pm - 9:05 amPHL  Philadelphia-LHR London Heathrow
10h 25m1 stop Dublin
$865Aer Lingus
Mon, Dec 7 - Mon, Dec 14
Aer Lingus Logo
8:50 am - 4:10 pmLHR  London Heathrow-PHL Philadelphia
12h 20m1 stop Dublin
Aer Lingus Logo
5:40 pm - 9:05 amPHL  Philadelphia-LHR London Heathrow
10h 25m1 stop Dublin
$867Aer Lingus
Mon, Jan 25 - Mon, Feb 1
American Airlines Logo
6:15 am - 3:30 pmLHR  London Heathrow-PHL Philadelphia
14h 15m1 stop Madrid Barajas
American Airlines Logo
1:38 pm - 6:15 amPHL  Philadelphia-LHR London Heathrow
11h 37m1 stop Toronto Pearson Intl
$869American Airlines
Booking Insights

Price, demand and travel trends for London to Philadelphia flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from London to Philadelphia?

Round-trip flights from London to Philadelphia typically range from $807 to $1,100. The lowest price found in the past 5 days was $795, on Scandinavian Airlines.

What is the cheapest London to Philadelphia flight route?

There's little price difference between London to Philadelphia routes. They average around $867 round-trip, based on KAYAK data over the past 12 months.

What's the cheapest day of the week to fly from London to Philadelphia?

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from London to Philadelphia. It’s 7% cheaper than the average day, while Saturday is the most expensive, with prices 3% higher.

What’s the cheapest month to fly from London to Philadelphia?

•January is the cheapest month to fly from London to Philadelphia at $780 round-trip.
•August ($1,155) and July ($1,064) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 48% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from London to Philadelphia the cheapest?

Flights from London to Philadelphia are cheapest 18 weeks before departure. Booking in this window typically costs about 26% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from London to Philadelphia

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Duncan Madden

Duncan Madden

Expert on British Airways and LHR

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Harriet Baskas

Harriet Baskas

Expert on American Airlines and PHL

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Marisa Garcia

Marisa Garcia

Expert on Iberia

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Key details for London to Philadelphia flights

Low season

February

Cheapest flight

$414
Beat the crowds with an average 34% drop in travelers.
The most popular month to fly with an average 41% increase in travelers.
One-way flight from London Stansted Airport to Philadelphia

When to book flights from London to Philadelphia

Are your dates flexible? Find out the best times to travel from London to Philadelphia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Flights from London to Philadelphia: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from London to Philadelphia 
Verified travelerFlew with American Airlines-Jul 2024
Make sure you are at the airport at least 3 hours early to ensure that you can check in, go through security, and so that you can find your departure gate within plenty of time so you are not rushing.
Anne KatherineFlew with Iberia-Jul 2024
Need more snacks. As meals not big and need more to eat Also take own water on board as not enough drinks offered from cabin crew - can feel dehydrated during flight

Your London to Philadelphia flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What are the earliest and latest flights from London to Philadelphia?

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

    • Earliest: departs at 10:35 am and lands at 6:42 pm
    • Latest: departs at 1:10 pm and lands at 9:17 pm.

    The flight takes about 8h 07m.

  • What cabin classes can I book on flights from London to Philadelphia?

    Three cabin classes are available on flights from London to Philadelphia:

    • Economy Class
    • Premium Economy Class
    • Business Class

  • How long is a flight from London to Philadelphia?

    A nonstop flight from London to Philadelphia takes 8h 07m, covering 3,546 miles.

  • Do I need a passport to fly from London to Philadelphia?

    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.

  • How much should I expect to pay for a London to Philadelphia flight?

    Round-trip flights from London to Philadelphia range from $807 to $1,100, with an average of $934 over the past 12 months. Anything below $807 counts as a good deal.

  • How expensive are last-minute London to Philadelphia flights?

    Last-minute fares on this route (booked within two weeks of departure) run 18% above the $934 route average. Book 18 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from London to Philadelphia?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $745 round-trip via Washington, D.C. Dulles Intl (IAD), compared to $949 for nonstop.

  • What is the standard checked-bag allowance on flights from London to Philadelphia?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $73–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • How are flight departures from London to Philadelphia spread across the day?

    Morning is the busiest departure period on London to Philadelphia flights, with 50% of flights leaving in that window. Afternoon departures account for 50%, evening flights for 0%, and night flights for 0%.

  • Have flight prices from London to Philadelphia changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $795 to $7,404. That means the highest observed fare was about 9x higher than the lowest one.

  • Which airlines offer Wi-Fi on London to Philadelphia flights?

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

  • How are flight prices from London to Philadelphia looking right now?

    One-way fares from London to Philadelphia are currently lower than usual. Average one-way flight prices are about $534, which is 31% below the typical average for this route.

  • What car rental options are available at Philadelphia Airport (PHL)?

    Philadelphia Airport (PHL) hosts 5 major car rental companies, with daily rates averaging $70 for economy cars. Top options include:

    • Payless
    • Dollar
    • Hertz
    • Thrifty
    • Alamo

  • Which airports can I use when flying from London to Philadelphia?

    Flights from London to Philadelphia 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 Philadelphia (PHL).

  • What time of day has the fewest delays on flights from London to Philadelphia?

    Morning flights have the fewest delays on this route, while afternoon departures tend to have the most.

  • At what point is a flight considered delayed from London to Philadelphia?

    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 Philadelphia route, 16% of flights were delayed in the past 3 months, with delays averaging 2h 28m.

  • Which airports do connecting flights from London to Philadelphia pass through?

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

    • Dublin (DUB) - 60% of one-stop connections
    • Boston Logan Intl (BOS) - 31% of one-stop connections
    • Orlando (MCO) - 4% of one-stop connections
    • Montreal Pierre Elliott Trudeau Intl (YUL) - 3% of one-stop connections

  • Can I save money by using flexible dates for flights from London to Philadelphia?

    Yes. Flexible dates can save you up to 11% on flights from London to Philadelphia. Tuesday is the cheapest departure day at $869 round-trip on average, while Saturday is the most expensive at $968, a difference of $99.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What airlines fly from London to Philadelphia?

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

    • American Airlines
    • British Airways

  • How much time can I save by choosing a different layover airport from London to Philadelphia?

    Flying via Montreal Pierre Elliott Trudeau Intl (YUL) gives the shortest average 1-stop total travel time at 10h 49m, compared with 11h 03m via Dublin (DUB) and 11h 58m via Washington, D.C. Dulles Intl (IAD).

  • What is the time difference between London and Philadelphia?

    Philadelphia is 5 hours behind London (Eastern Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Philadelphia?

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

  • Which airlines offer extra legroom and free seat selection on London to Philadelphia flights?

    Among airlines operating London to Philadelphia flights:

    • 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.

  • Which airlines include bags at no extra cost on London to Philadelphia flights?

    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

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

  • Which terminal at the London Heathrow Airport has the most to offer?

    All terminals at the London Heathrow Airport are very modern and offer a lot of convenient services, however Terminal 2 and Terminal 5 are considered to be the best according to world lists. Terminal 2 has many interesting restaurants like The Gorgeous Kitchen or The Flying Chariot whereas Terminal 5 offers a quality shopping experience with brands such as Chanel and Valentino.

  • How do I get to central Philadelphia from Philadelphia Airport?

    Getting to the city centre of Philadelphia is easy with a SEPTA train that departs every half an hour from all terminals, the ticket will cost you about 6£. A cheaper alternative is a SEPTA bus with one airport stop on the Arrivals Road and three routes that take you through different stops. Those who prefer a more comfortable mode of transportation can take a taxi, the fare from the airport to the city centre is around 22£.

  • Can I rent a car at the Philadelphia Airport?

    Yes, a car is the most common mode of transportation in the United States and if you plan to visit a lot of places which are spread out around the city, it is a good idea to rent a car at the airport. There are seven rental agencies at Philadelphia International Airport and you can reach them from the baggage claim zone via a free shuttle.

  • Does the Philadelphia Airport provide any services for travellers with animals?

    Those who are travelling to Philadelphia with a furry companion will be happy to hear that there are seven Pet Ports inside of each terminal and a few outdoor relief areas for animals which will surely make the time at the airport more bearable for the animals.

Your guide to booking London to Philadelphia flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure and avoid flying on Saturday. On this route, Tuesday flights average $869, about $99 less than Saturday fares (10% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 18 weeks before you fly. On this route, that window historically saves about 26% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your London to Philadelphia trip for January. Fares historically average $780 round-trip in that month - typically $375 less than the most expensive month, which is August (based on the last 12 months).
  • For the best chance of arriving on time, fly with American Airlines. Over the past three months, 87% of American Airlines flights from London to Philadelphia arrived on time, slightly above the route average of 84%. When flights on this route arrive late, they're delayed by an average of 2h 28m, so choosing an airline with strong on-time performance can make a difference if you're on a tight schedule.
  • If you have the time, taking a 1-stop flight through Washington, D.C. Dulles Intl Airport (IAD) can be cheaper than flying direct. The cheapest layover option averages $745 round-trip on this route - about $204 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Philadelphia Airport.

    • Microtel Inn & Suites by Wyndham Philadelphia Airport
    • Delta Hotels by Marriott Philadelphia Airport
    • Sonesta Select Philadelphia Airport
  • If you get hungry while waiting for your flight from London to Philadelphia, you will find a wide range of restaurants at London Heathrow Airport. You can even pre-order your food and drinks at some restaurants via the Heathrow app if you wish to avoid waiting in lines.
  • Want to fly from London to Philadelphia without any stops along the way? That is not an issue as you can find regular non-stop flights London Heathrow Airport to Philadelphia with British Airways, Finnair and American Airlines.
  • Those who booked their flights from London to Philadelphia with British Airways can relax in the comfort of the airline’s lounges at terminal 3 and terminal 5. London Heathrow Airport is the home hub for British Airways so the passengers can expect a variety of services and lounges, for example the Galleries Club lounges primarily for first class or premium members.
  • Kids will not be bored while waiting for a flight at Philadelphia Airport as they will have a lot of fun at the aviation-themed playground in terminal A. Mothers who are travelling with infants can use the Mamava suite or Family Restrooms located around the airport. The Nursing Mother’s Station is also available and is free for up to 30 minutes.
  • Philadelphia Airport makes sure to keep the waiting passengers occupied by setting up art exhibitions around the airport grounds. Those who have a lot of time until their flight can also enjoy a book from a virtual library that is available free of charge or relax at XpresSpa while getting a massage or beauty treatments.

Prefer to fly direct from London to Philadelphia?

 
Find which airlines fly direct from London to Philadelphia Airport, which days they fly and book direct flights.

Direct departures

London to Philadelphia

Monday

American Airlines,British Airways

American Airlines,British Airways

Tuesday

American Airlines,British Airways

American Airlines,British Airways

Wednesday

American Airlines,British Airways

American Airlines,British Airways

Thursday

American Airlines,British Airways

American Airlines,British Airways

Friday

American Airlines,British Airways

American Airlines,British Airways

Saturday

American Airlines,British Airways

American Airlines,British Airways

Sunday

American Airlines,British Airways

American Airlines,British Airways

See more direct flights

Direct returns

Philadelphia to London

Monday

American Airlines,British Airways

American Airlines,British Airways

Tuesday

American Airlines,British Airways

American Airlines,British Airways

Wednesday

American Airlines,British Airways

American Airlines,British Airways

Thursday

American Airlines,British Airways

American Airlines,British Airways

Friday

American Airlines,British Airways

American Airlines,British Airways

Saturday

American Airlines,British Airways

American Airlines,British Airways

Sunday

American Airlines,British Airways

American Airlines,British Airways

See more direct flights

More options for your flight from London to Philadelphia

Complete your trip to Philadelphia with a hotel stay or car rental