LHR - PHL

$585 Find Cheap Flights from London Heathrow Airport to Philadelphia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Philadelphia departing on 5/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Philadelphia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Philadelphia, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Philadelphia, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$791
Typical prices: $1,025-$754
Air Canada
Sat 7/11Sat 7/25
LHR - PHL • 1 stop
Cheapest non-stop
$835
Typical prices: $909-$686
British Airways
Thu 5/14Wed 5/20
LHR - PHL • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
American Airlines' Main Cabin Extra includes early boarding.
Bring water on Iberia flights to avoid dehydration.
Expert advice
Expert advice
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Expert advice
Expert advice
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Top airlines
Cheapest • from $791 (round-trip)
Best reviews • 7.3 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with American Airlines and British Airways. Average duration is 7h 55m
Direct flights
Direct flights
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Direct flights
Direct flights
+1
Avoid delays
Most punctual • 82% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $940 (round-trip)
Shortest trip • 11h 19m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 31% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 13% price drop
Most popular
Good to know
Good to know
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Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Heathrow to Philadelphia (LHR-PHL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Heathrow to Philadelphia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Heathrow to Philadelphia

Sat, Jul 11 - Sat, Jul 25
Air Canada Logo
9:30 am - 2:49 pm
LHR
-
PHL
10h 19m
1 stop
Air Canada Logo
3:25 pm - 6:30 am
PHL
-
LHR
10h 05m
1 stop
$791Air Canada
Tue, Jun 2 - Wed, Jul 1
JetBlue Logo
8:40 am - 6:52 pm
LHR
-
PHL
15h 12m
1 stop
JetBlue Logo
8:28 am - 6:30 am
PHL
-
LHR
17h 02m
1 stop
$793JetBlue
Thu, May 21 - Sat, Jun 6
Lufthansa Logo
6:55 am - 4:05 pm
LHR
-
PHL
14h 10m
2 stops
Lufthansa Logo
3:25 pm - 9:00 pm
PHL
-
LHR
48h 35m
2 stops
$794Lufthansa
Tue, Jun 2 - Wed, Jul 1
JetBlue Logo
8:40 am - 6:52 pm
LHR
-
PHL
15h 12m
1 stop
JetBlue Logo
8:28 am - 6:30 am
PHL
-
LHR
17h 02m
1 stop
$795JetBlue
Thu, May 21 - Sat, Jun 6
Lufthansa Logo
6:55 am - 4:05 pm
LHR
-
PHL
14h 10m
2 stops
Lufthansa Logo
3:25 pm - 6:35 am
PHL
-
LHR
34h 10m
2 stops
$798Lufthansa
Thu, Jun 4 - Sat, Jun 13
Aer Lingus Logo
1:25 pm - 6:55 pm
LHR
-
PHL
10h 30m
1 stop
Aer Lingus Logo
8:25 pm - 1:55 pm
PHL
-
LHR
12h 30m
1 stop
$800Aer Lingus
Mon, Aug 31 - Tue, Sep 8
United Airlines Logo
3:30 pm - 4:05 pm
LHR
-
PHL
29h 35m
1 stop
United Airlines Logo
10:35 am - 9:00 pm
PHL
-
LHR
29h 25m
2 stops
$807United Airlines
Mon, Aug 24 - Thu, Sep 10
American Airlines Logo
11:10 am - 7:11 pm
LHR
-
PHL
13h 01m
1 stop
American Airlines Logo
1:29 pm - 9:40 am
PHL
-
LHR
15h 11m
1 stop
$808American Airlines
Thu, Jun 4 - Sat, Jun 13
Aer Lingus Logo
1:25 pm - 6:55 pm
LHR
-
PHL
10h 30m
1 stop
Aer Lingus Logo
8:25 pm - 1:55 pm
PHL
-
LHR
12h 30m
1 stop
$809Aer Lingus
Fri, Jul 10 - Sat, Jul 11
Lufthansa Logo
6:30 am - 4:05 pm
LHR
-
PHL
14h 35m
1 stop
Lufthansa Logo
3:25 pm - 6:35 am
PHL
-
LHR
34h 10m
2 stops
$810Lufthansa
Booking Insights

KAYAK's insights & trends for Heathrow to Philadelphia flights

Get data-powered insights and trends into flights from Heathrow to Philadelphia to help you find the cheapest flights, the best time to fly and much more.

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from London Heathrow Airport to Philadelphia departing in July.

What’s the cheapest day of the week to fly from London Heathrow Airport to Philadelphia?

The average price of all round-trip flights from London Heathrow Airport to Philadelphia clicked on KAYAK for each day over the last 12 months.

For London Heathrow Airport to Philadelphia, Monday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Philadelphia back to London Heathrow Airport, the best deals are generally found on Wednesday, with Saturday being the most expensive.

What is the cheapest month to fly from London Heathrow Airport to Philadelphia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Philadelphia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London Heathrow Airport to Philadelphia is September, where tickets cost $680 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $897 and $892 respectively.

Can I save money by flying with a layover from London Heathrow Airport to Philadelphia?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $700 on average.

How far in advance should I book a flight from London Heathrow Airport to Philadelphia?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Philadelphia, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from London Heathrow Airport to Philadelphia, you should book around 2 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Expert advice

Expert advice for your flight from Heathrow to Philadelphia

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
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.

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.

Good to know

Low seasonFebruary
Cheapest flight$585
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 14% increase in price.
Flight from London Heathrow Airport to Philadelphia

When to book flights from Heathrow to Philadelphia

Are your dates flexible? Find out the best times to travel from Heathrow to Philadelphia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

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

Insights shared by verified travelers who flew the route from Heathrow to Philadelphia 
Verified travelerFlew with American Airlines
LHR
-
PHL
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
LHR
-
PHL
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

FAQs for booking London Heathrow Airport to Philadelphia flights

  • What is the cheapest flight from London Heathrow Airport to Philadelphia?

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to Philadelphia was $585 for a one-way ticket and $791 for a round-trip.

  • Do I need a passport to fly between London Heathrow Airport and Philadelphia?

    Yes, you'll most likely have to show a valid passport before boarding the plane in London Heathrow Airport and on arrival in Philadelphia.

  • Which airports will I be using when flying from London Heathrow Airport to Philadelphia?

    When flying out of London Heathrow Airport you will be using London Heathrow. You will be landing at Philadelphia, also known as Philadelphia.

  • Which airlines offer Wi-Fi service onboard planes from London Heathrow Airport to Philadelphia?

    American Airlines, KLM, and Air France offer inflight Wi-Fi service on the London Heathrow Airport to Philadelphia flight route.

  • Which aircraft models fly most regularly from London Heathrow Airport to Philadelphia?

    The Airbus A350-1000 is the aircraft model that flies most regularly on the London Heathrow Airport to Philadelphia flight route.

  • Which airline alliances offer flights from London Heathrow Airport to Philadelphia?

    oneworld is the only airline alliance operating flights between London Heathrow Airport and Philadelphia.

  • On which days can I fly direct from London Heathrow Airport to Philadelphia?

    There are nonstop flights from London Heathrow Airport to Philadelphia on a daily basis.

  • Which is the best airline for flights from London to Philadelphia, Aer Lingus or American Airlines?

    The two airlines most popular with KAYAK users for flights from London to Philadelphia are Aer Lingus and American Airlines. With an average price for the route of $1,161 and an overall rating of 7.3, Aer Lingus is the most popular choice. American Airlines is also a great choice for the route, with an average price of $814 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from London Heathrow Airport to Philadelphia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Heathrow Airport to Philadelphia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to Philadelphia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Philadelphia from London Heathrow Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Heathrow Airport to Philadelphia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Philadelphia with an airline and back to London Heathrow Airport with another airline. Booking your flights between London Heathrow Airport and PHL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport to Philadelphia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Philadelphia from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from London Heathrow Airport to Philadelphia

  • Looking for a cheap flight? 25% of our users found flights on this route for $708 or less one-way and $869 or less round-trip.

Prefer to fly direct from London Heathrow Airport to Philadelphia?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from London Heathrow to Philadelphia.
Find which airlines fly direct from London Heathrow Airport to Philadelphia Airport, which days they fly and book direct flights.

Direct departures

London Heathrow 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 Heathrow

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

Reviews of the top 3 airlines serving from Heathrow to Philadelphia

 
See real verified KAYAK customer reviews for airlines flying from London to Philadelphia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Heathrow to Philadelphia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.3
Aer LingusOverall score based on 1536 reviews
8.1Crew
7.4Boarding
6.6Food
7.0Entertainment
7.2Comfort
Airline reviews

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

10.0 ExcellentAnthon, Apr 2026
DUB - BOS
Read more Aer Lingus reviews

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

OK overall. Flight was delayed Crew on flight was good

On time, only a little turbulence, very competent and caring attendants. Clear information.

Late late late. Delayed and arrived an hour late for a 1 hour 45 minute connection. Every time. Poor record for this company. I try to fly any other carrier first.

The flights are literally always delayed arriving, boarding and taking off so they are always late for the connection. I planned ahead so I was okay but many others aren't. The food was terrible. The staff was very pleasant. I appreciate boarding back to front.

The crew was friendly. The plane was comfortable. In-flight wifi didn't work well at all. The ride was quite turbulent but understandable given the weather.

My issue is with the SkyWest terminal. The flight was not listed on the main airport flight screen list, and I had to do a Google search to locate the terminal and gate. We had to ask several airport employees where to locate the phantom gate. The airport did not provide adequate signage and was confusing. When we arrived, there was one vendor providing services that quickly closed, leaving zero options for food and drink while we waited hours for our delayed flight. The crew that assisted with check-in and boarding was VERY friendly.

Economy seats a bit small but other than that it was all good.

delayed flight stayed whole night at washington Dallas airport at seats , uncomfortable . i am senior citizen , very tired , worst travel.

No complimentary drinks or snacks offered on a 2 hour flight was disappointing but everything else went well

As we approached Denver, we encountered quite a bit of turbulence. I know this can sometimes be the case as I frequently fly this route but not on American. My gripe: Usually a pilot or co-pilot alerts passengers to the possibility of turbulance ahead of time. This did not occur nor did he communiucate during what was a pretty rough ride.

When I booked my flight a month ago - I selected a seat. That seat was NOT the one I ended up with when I checked into my flight the day before. This is the second time this has occurred. So, I checked my next flight on Wednesday and Thursday and no seat was assigned. Poor, very poor customer service.

Flight boarded from Gate 159B, the farthest gate in the LAX Bradley Terminal. While the flight operated on time, the first class cabin attendant made no recognition of my being an Advantage Executive Platinum member.

British Airways is an excellent airline. Comfort, food and airline personnel.

We changed our flight because of weather. Unfortunately we were on hold for over an hour, but since we were 5 people who all booked individually, we felt more comfortable doing it with an agent. It all worked out in the end.

American Airlines did everything they could with the high Spring Break crowd. I was frustrated to be changed from 1st class to a middle seat at the back of the plane. This has happened before, not sure booking 1st class and paying the extra actually works.

Older airplane with worn out seats. No entertainment system at all. Connecting to Wi-Fi was problematic and hit and miss.

I didn't end up taking this flight. I got up at 4am for a flight that was supposed to board at 6am - at 5:55am you delayed the flight to 10am. The airport is under construction so I switched to a later flight as I wasn't going to sit in the airport for 4 hours. They said the delay was due to the crew needing rest from a flight coming in late the night before - if that was the case then I think you should have delayed the flight much sooner so that passengers wouldn't get up so early and get to the airport to sit and wait.

I very rarely fly American and my experience today reenforces that is the correct decision. While the staff were all very courteous, our flight was first thing in the morning so there was no reason to be delayed, yet appropriate maintenance checks weren’t completed prior to our flight so we were delayed multiple times. Not a great showing, American Airlines.

Boarding is always an ordeal. Less dogs on flights. I am highly allergic to dogs and cats. Why are there so many animals these days?

A shout-out to the flight attendent, Lauren, who was the main person assisting me. She was amazing - perfect balance of bright, cheerful, engaging, yet formal

OK, except for a cabin attendant's lack of attention.

efficient. on time. cabin crew were very professional and very nice to deal with. would definately fly BA again.

It was great overall. A few slight improvements could be made on the onboarding process at the Gates with announcements and clarity of communications (both at the gate and in flight). The movies in the entertainment options could be improved for bollywood, hollywood.

I alrady responded to this request, and expllaned at length that this was the worst flying experience in my 77 years. I will NEVER fly BA again.

Airbus A350 is poorly designed for wheelchair users and reduced mobility passengers. The angle of the pods makes it awkward to transfer. I was able to but I have ab stability. It could be a real challenge for people with more severe mobility impairments. You'd think Airbus would have come up with a solution for this or thought more about us disabled folks more when designing this aircraft.

The crew has always been great on BA. They are very friendly and accommodating. I like that they have vegetarian options already in the menu. And the free wine is a nice perk.) I noticed (both directions of my trip) minor upgrades/ replacements needed on the plane itself (touch screen didn't work with touch; bathroom light didn't go on). However, this is one of my favorite airlines.

Everything was spectacular except the boarding. It was just a mob of people while all groups were called over the public address system.

The Britts are wonderful to fly with and the crew were very hospitable. Again, I really wish they had been able to retrieve my carryon bag from baggage claim before the flight so I could be in a less worrisome state of mind, but that's not on them. I completely understand. The window seats with the dimmable windows were very cool!

There was a delay for the San Francisco-London flight, but we were all informed via text and email. The staff was very friendly and nice and the food was good. I do recommend that the airline offer something without eggs or something vegan for the vegetarian meal option. A lot of Indians are lacto-vegetarian, while some could be allergic to eggs/dairy.

Everything you need to know for your flight from Heathrow to Philadelphia

Information on your arrival and departure airports