Find Cheap Flights from Philadelphia to London Heathrow (PHL - LHR)

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Good to Know

Low Season:
March
Best time to beat the crowds
2%
expected price decrease
High Season:
October
Most popular time to fly
5%
expected price increase
Average Price:
$901
(avg. price over the last 2 weeks)
Good Deal:
$731
or less (round trip)

When to Book Flights from Philadelphia to London Heathrow

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $731 or less.
The cheapest flight from Philadelphia to London Heathrow was found 60 days before departure, on average.
Book at least 3 weeks before departure in order to get a below-average price.
High season is considered to be September, October and November. The cheapest month to fly is March.
Morning departure is around 25% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Philadelphia to London Heathrow Flights

How long does a flight from Philadelphia to London Heathrow take?
An average nonstop flight takes 7h 05m, covering a distance of 3535 miles.
How many flights are there between Philadelphia and London Heathrow?
There are 573 (nonstop) flights between Philadelphia and London Heathrow per week, averaging 78 per day.
Which airlines provide the cheapest flights from Philadelphia to London Heathrow?
In the past 3 days, the cheapest round-trip tickets were found on British Airways ($562), Icelandair ($576) and Multiple Airlines ($643).
Do I need a passport to fly between Philadelphia and London Heathrow?
Yes.
Which airlines fly most frequently between Philadelphia and London Heathrow?
American Airlines (11 times daily), Finnair (11 times daily), Iberia (11 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Philadelphia to London Heathrow?
For Philadelphia to London Heathrow, Wednesday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from London Heathrow back to Philadelphia, the best deals are generally found on Friday, with Thursday being the most expensive.

Book cheap flights from Philadelphia to London Heathrow (round-trip)

Airports
Origin
Philadelphia
$562
only
$562
Destination
London
$562
only
$562
Wed, Apr 11
PHL
LHR
11h 50m
Tue, Apr 17
LHR
PHL
24h 40m
Trip: 7 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 53 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
PHL
LHR
Good 7.6

Staff was excellent

Seats were very cramped

PHL
LHR
Excellent 10.0

Everything

Nothinf

PHL
LHR
Okay 5.6

Food was good.

My wife had a tall guy on one side whose knees spilled over into her. She also had a tall guy in front of her who fully reclined his seat. She felt like she was in a coffin. She had to get up and walk around to get some air. The seats are too close on this 747 that no one should have to fly it. .

PHL
LHR
Mediocre 2.0

I was not given a chance to like anything as the flight was cancelled.

That when I called to rebook another flight, I was on hold for 75 minutes. Yes, that was 75 minutes. I was switched from British Air to Finn Air and then back to British Air. It was a mess.

PHL
LHR
Okay 5.0

I feel like the overall product is so devalued at BA these days. It just doesn't feel classy anymore. As opposed to Lufthansa, which is an example of a European carrier that cares about passenger comfort and experience. Also the typical circling of LHR to get a slot is annoying and makes me want to avoid BA.

Tue, May 29
PHL
LHR
10h 10m
Thu, May 31
LHR
PHL
11h 10m
Trip: 3 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6711 reviews
Overall
7.6
Boarding
7.3
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.3
KEF
EWR
Mediocre 2.8

My entertainment system stopped working 1/2 way through the flight and there was very little leg room that caused back pain

ORY
KEF
Okay 4.0

They were helpful and let me check my boulder pad as sports equipment for free on the flight to paris.

KEF
OSL
Excellent 8.0

We were ahead of schedule, which was nice

BOS
KEF
Good 7.6

They provided a pillow and blanket which was very nice, and the crew were helpful in finding space for items during take-off and landing. The boarding and exiting were fairly quick.

Everything on board costs extra, including basic drinks and snacks, but that's to be expected on cheaper flights. I assumed that the inflight movies cost money as well, although I didn't watch any because I didn't have headphones.

KEF
BOS
Excellent 8.6

Crew was friendly, like the bigger plane and direct flight.

Luggage fees!!!

Mon, Aug 13
PHL
LHR
11h 40m
Sun, Aug 26
LHR
PHL
21h 15m
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Mar 28
PHL
LHR
10h 35m
Tue, Apr 3
LHR
PHL
24h 30m
Trip: 7 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4251 reviews
Overall
7.6
Boarding
7.7
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.9
DUB
GVA
Good 6.0

NO COMPLIMENTARY WATER OR COFFEE. SEATS larger and MORE COMFORTABLE

YYZ
DUB
Excellent 8.3

I flew overnight from Toronto, Canada to Dublin and had a relatively pleasant experience. The food and drink trolleys came by quite quickly and frequently, and the food exceeded my expectations. The crew was friendly, for the most part. Boarding certainly could've been smoother... But overall, I'd fly Aer Lingus again for an overseas trip.

DUB
JFK
Excellent 10.0

All worked smoothly

Service and friendliness

DUB
YYZ
Okay 4.0

Having had bad experiences with Aer Lingus before, I was hesitant to book with Aer Lingus again. But sadly, I was booking this flight last minute and had no other option. The route was Dublin to Calgary, via Toronto. I left myself plenty of time im Toronto to clear customs as I know it can take a while. The day of, the flight ended up being 1.5 hours longer than usual due to headwinds, leaving me with only 2.5 hours in Toronto. I ended up waiting 2 hours and 15 minutes for my bag and missing my connecting flight (my sister who was also on the same flight received hers in 30 mins and made the flight). Westjet was wonderful and put me on a later flight but Aer Lingus didn't have any assistance for me.

Aer Lingus lost my sister's luggage going to Ireland and never contacted my sister once the luggage was found. She only received it the day we flew back to Calgary. Poor customer service when inquiring about the bag, no compensation for necessities purchased.

LHR
DUB
Excellent 8.0

Staff and service

Tue, Jul 31
PHL
LHR
21h 30m
Wed, Aug 8
LHR
PHL
33h 38m
Trip: 9 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 18070 reviews
Overall
8.0
Boarding
7.9
Comfort
7.8
Crew
8.3
Entertainment
8.1
Food
7.9
ORD
IST
Excellent 10.0

2nd time with Turkish Airlines; no concerns. Everything handled timely and professionally.

JFK
IST
Good 7.0

Total chaos during boarding..no organization

MIA
IST
Excellent 10.0

Great service and brand new plane!

JFK
IST
Excellent 8.3

I did like the food, very nice stuff.

I order some to help to find my gate for a another international flight,but no one came. For such long flight, definitely need to have sits with more space. Very hard to flight in such tight space

IST
SFO
Good 7.3

The flight was on time, the food was good. Nice selection for onboard entertainment. The plane was very clean.

1. The boarding process at Istanbul airport was horrible. No one could speak or understand english. My father was on a wheelchair and he was the last one to be boarded on the plane! There was so much confusion - some people wanted me to go separately from him, others wanted him to walk down the stairs on his own, etc. etc. There were hardly any announcements for people with special needs. Generally they are allowed to board first as they need more time to settle. I could barely find overhead bin space for his stuff. 2. There were several remote controls broken on the plane. A lot of people had to suffer through a non working entertainment screen. 3. One of the hostess was hardly listening to anything I had to say. She seemed to be in so much of a hurry and had a very bad attitude.

Sun, Jun 3
PHL
LHR
10h 10m
Mon, Jun 11
LHR
PHL
27h 05m
Trip: 9 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6711 reviews
Overall
7.6
Boarding
7.3
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.3
CDG
KEF
Excellent 9.3

Food options

BRU
KEF
Excellent 10.0

My exit aisle seat was just great, with no one on either side of me !!!!! Very kind airplane staff. I had a great sleep.

nothing

BOS
KEF
Good 7.6

They provided a pillow and blanket which was very nice, and the crew were helpful in finding space for items during take-off and landing. The boarding and exiting were fairly quick.

Everything on board costs extra, including basic drinks and snacks, but that's to be expected on cheaper flights. I assumed that the inflight movies cost money as well, although I didn't watch any because I didn't have headphones.

DEN
KEF
Excellent 8.0

Surprised by very large bag fees, reservation was unclear about baggage allowance and charges.

ORY
KEF
Okay 4.0

They were helpful and let me check my boulder pad as sports equipment for free on the flight to paris.

Wed, Apr 4
PHL
LHR
16h 45m
Wed, Apr 18
LHR
PHL
11h 10m
Trip: 15 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 53 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
PHL
LHR
Okay 5.0

I feel like the overall product is so devalued at BA these days. It just doesn't feel classy anymore. As opposed to Lufthansa, which is an example of a European carrier that cares about passenger comfort and experience. Also the typical circling of LHR to get a slot is annoying and makes me want to avoid BA.

PHL
LHR
Excellent 10.0

The personnel were most helpful, pleasant, and reassuring when I discovered I had left something on the plane. It was found and returned to me quite promptly and my continued flight was rebooked with the minimum of fuss (and embarrassment). Everyone was wonderful.

I am not a seasoned traveller. Checking for a small item (such as a passport) in the overhead compartment was not possible.

PHL
LHR
Mediocre 2.0

I was not given a chance to like anything as the flight was cancelled.

That when I called to rebook another flight, I was on hold for 75 minutes. Yes, that was 75 minutes. I was switched from British Air to Finn Air and then back to British Air. It was a mess.

PHL
LHR
Okay 4.0

It wasn't a BA flight, but AA. Confusion reigns!

PHL
LHR
Mediocre 2.6

There is more room in an economy seat on a commuter flight than there is on a 747. After this itinerary is complete I have no intention to ever fly with British Airways again.

Tue, Jun 5
PHL
LHR
10h 10m
Fri, Jun 8
LHR
PHL
27h 05m
Trip: 4 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6711 reviews
Overall
7.6
Boarding
7.3
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.3
ORY
KEF
Okay 4.0

They were helpful and let me check my boulder pad as sports equipment for free on the flight to paris.

CDG
KEF
Excellent 9.3

Food options

KEF
BOS
Excellent 8.6

Crew was friendly, like the bigger plane and direct flight.

Luggage fees!!!

SEA
KEF
Excellent 8.0

Blankets and pillows at each seat

Only one drink service on a very long flight. very expensive food choices.

DEN
KEF
Excellent 8.0

Surprised by very large bag fees, reservation was unclear about baggage allowance and charges.

Mon, Aug 13
PHL
LHR
11h 40m
Thu, Aug 23
LHR
PHL
12h 55m
Trip: 11 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 53 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
PHL
LHR
Okay 5.6

Food was good.

My wife had a tall guy on one side whose knees spilled over into her. She also had a tall guy in front of her who fully reclined his seat. She felt like she was in a coffin. She had to get up and walk around to get some air. The seats are too close on this 747 that no one should have to fly it. .

PHL
LHR
Good 7.6

Staff was excellent

Seats were very cramped

PHL
LHR
Mediocre 2.0

I was not given a chance to like anything as the flight was cancelled.

That when I called to rebook another flight, I was on hold for 75 minutes. Yes, that was 75 minutes. I was switched from British Air to Finn Air and then back to British Air. It was a mess.

PHL
LHR
Mediocre 2.6

There is more room in an economy seat on a commuter flight than there is on a 747. After this itinerary is complete I have no intention to ever fly with British Airways again.

PHL
LHR
Excellent 8.6

Crew was good, attentive, helpful, eager to accommodate. The tea cart sped past without alerting anybody as to what it was or that it wasn't going to come back but moments later another crew member came by and was very quick to return with a tea for me, which was nice of them. Other flight operators have had somewhat limited entertainment options, I was amazed by the range available.

I was a little disappointed that in the video options, while it had he show Legion (something I'd been recommended by a friend recently), it was only the first 4 episodes instead of the complete 8, leaving a cliffhanger point in the story. Which was a bit of a shame.

Sun, May 27
PHL
LHR
10h 10m
Tue, May 29
LHR
PHL
11h 10m
Trip: 3 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6711 reviews
Overall
7.6
Boarding
7.3
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.3
CDG
KEF
Excellent 9.3

Food options

ORY
KEF
Okay 4.0

They were helpful and let me check my boulder pad as sports equipment for free on the flight to paris.

DEN
KEF
Excellent 8.0

Surprised by very large bag fees, reservation was unclear about baggage allowance and charges.

DEN
KEF
Okay 5.6

Entertainment...

Had a tray full of trash most of the way.. don’t they sell trash bags in Iceland?

BOS
KEF
Good 7.6

They provided a pillow and blanket which was very nice, and the crew were helpful in finding space for items during take-off and landing. The boarding and exiting were fairly quick.

Everything on board costs extra, including basic drinks and snacks, but that's to be expected on cheaper flights. I assumed that the inflight movies cost money as well, although I didn't watch any because I didn't have headphones.

Wed, Mar 28
PHL
LHR
22h 49m
Wed, Apr 11
LHR
PHL
12h 40m
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Feb 27
PHL
LHR
7h 05m
Fri, Mar 2
LHR
PHL
8h 35m
$1560
Trip: 4 days
7.1GoodShow reviews
Overall 7.1 Good
Based on 27 reviews
Overall
7.9
Boarding
8.0
Comfort
7.5
Crew
8.3
Entertainment
7.3
Food
7.2
PHL
LHR
Excellent 8.0

Flight attendant , i dont her but she was sweet and attentive.

The leg room was really tight even for short person

PHL
LHR
Okay 5.3

The entertainment and service was the only plus on this flight.

When I booked my ticket a month in advance, British Airways was going to charge me extra for trying to book my seating in advance. They told me it would be free if I called 24hrs before the flight. I called 24hrs before and they told me they could not book my seats because the airport owned the seating. My first flight was with American Airlines, they gave me a boarding pass, however for my leg with British Airways, I had to go get ANOTHER boarding pass to board the flight. This airline was very inconvenient and I felt scammed booking with them. I would not recommend this airline to anyone!

PHL
LHR
Okay 4.6

I got me where i needed to go. The food was okay.

Lost luggage, poor seats, poor entertainment.

PHL
LHR
Good 7.6

B.787 flight operated by BA; free wine, great food and IFE.

Seating now so cramped it's becoming dangerous.

PHL
LHR
Good 6.0

It was a quick, smooth flight.

The chicken for dinner was horrible. The call buttons for assistance sounded constantly the entire flight.. Not sure if it was a malfunction.

Sat, Jun 30
PHL
LHR
11h 25m
Mon, Jul 9
LHR
PHL
12h 15m
Trip: 10 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 4251 reviews
Overall
7.6
Boarding
7.7
Comfort
7.3
Crew
8.0
Entertainment
7.0
Food
6.9
DUB
BOS
Good 7.0

Pleasant crew and good food/snack service almost forgotten as I stood at the baggage carousel for 40 minutes.

Baggage claim very frustrating (40 minutes) particularly after 12 hours of airports and airplanes. Messed up our ground transportation plans for no apparent reason. Totally unexplained!

LHR
DUB
Excellent 8.0

Staff and service

BOS
DUB
Okay 5.3

AER LINGUS complimentary water not offered . seats small padding marginal.food offerings compared to other air lines LOW QUALITY

DUB
GVA
Good 6.0

NO COMPLIMENTARY WATER OR COFFEE. SEATS larger and MORE COMFORTABLE

DUB
YYZ
Okay 4.0

Having had bad experiences with Aer Lingus before, I was hesitant to book with Aer Lingus again. But sadly, I was booking this flight last minute and had no other option. The route was Dublin to Calgary, via Toronto. I left myself plenty of time im Toronto to clear customs as I know it can take a while. The day of, the flight ended up being 1.5 hours longer than usual due to headwinds, leaving me with only 2.5 hours in Toronto. I ended up waiting 2 hours and 15 minutes for my bag and missing my connecting flight (my sister who was also on the same flight received hers in 30 mins and made the flight). Westjet was wonderful and put me on a later flight but Aer Lingus didn't have any assistance for me.

Aer Lingus lost my sister's luggage going to Ireland and never contacted my sister once the luggage was found. She only received it the day we flew back to Calgary. Poor customer service when inquiring about the bag, no compensation for necessities purchased.

Thu, Apr 5
PHL
LHR
16h 54m
Thu, Apr 12
LHR
PHL
23h 55m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Mar 23
PHL
LHR
29h 59m
Sat, Mar 31
LHR
PHL
28h 15m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Aug 21
PHL
LHR
18h 35m
Wed, Sep 12
LHR
PHL
27h 05m
Trip: 23 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6711 reviews
Overall
7.6
Boarding
7.3
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.3
DEN
KEF
Okay 5.6

Entertainment...

Had a tray full of trash most of the way.. don’t they sell trash bags in Iceland?

SEA
KEF
Excellent 8.0

Blankets and pillows at each seat

Only one drink service on a very long flight. very expensive food choices.

ORD
KEF
Good 7.3

Friendly staff Good entertainment options USB at every seat

Food options very expensive

ORY
KEF
Okay 4.0

They were helpful and let me check my boulder pad as sports equipment for free on the flight to paris.

CDG
KEF
Excellent 9.3

Food options

Wed, Jun 13
PHL
LHR
13h 23m
Tue, Jun 19
LHR
PHL
12h 35m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Fri, May 25
PHL
LHR
11h 25m
Fri, Jun 1
LHR
PHL
10h 00m
Trip: 8 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 53 reviews
Overall
7.5
Boarding
7.6
Comfort
7.2
Crew
8.0
Entertainment
7.0
Food
6.9
PHL
LHR
Mediocre 2.6

There is more room in an economy seat on a commuter flight than there is on a 747. After this itinerary is complete I have no intention to ever fly with British Airways again.

PHL
LHR
Excellent 8.6

Crew was good, attentive, helpful, eager to accommodate. The tea cart sped past without alerting anybody as to what it was or that it wasn't going to come back but moments later another crew member came by and was very quick to return with a tea for me, which was nice of them. Other flight operators have had somewhat limited entertainment options, I was amazed by the range available.

I was a little disappointed that in the video options, while it had he show Legion (something I'd been recommended by a friend recently), it was only the first 4 episodes instead of the complete 8, leaving a cliffhanger point in the story. Which was a bit of a shame.

PHL
LHR
Mediocre 2.0

I was not given a chance to like anything as the flight was cancelled.

That when I called to rebook another flight, I was on hold for 75 minutes. Yes, that was 75 minutes. I was switched from British Air to Finn Air and then back to British Air. It was a mess.

PHL
LHR
Okay 4.3

I thought I was supposed to get a free meal and was never offered that or even a complimentary beverage. The flight attendants allowed a group of four passenger to stand during almost the entire flight in the aisles and in my row, making it difficult for people to get around them and didn't allow for an enjoyable flying experience.

PHL
LHR
Excellent 10.0

The personnel were most helpful, pleasant, and reassuring when I discovered I had left something on the plane. It was found and returned to me quite promptly and my continued flight was rebooked with the minimum of fuss (and embarrassment). Everyone was wonderful.

I am not a seasoned traveller. Checking for a small item (such as a passport) in the overhead compartment was not possible.

Tue, Jul 31
PHL
LHR
11h 40m
Sun, Aug 12
LHR
PHL
21h 20m
Trip: 13 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Jun 28
PHL
LHR
18h 35m
Sat, Jul 7
LHR
PHL
27h 05m
Trip: 10 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6711 reviews
Overall
7.6
Boarding
7.3
Comfort
7.4
Crew
8.1
Entertainment
7.7
Food
6.3
SEA
KEF
Excellent 8.0

Blankets and pillows at each seat

Only one drink service on a very long flight. very expensive food choices.

KEF
EWR
Mediocre 2.8

My entertainment system stopped working 1/2 way through the flight and there was very little leg room that caused back pain

DEN
KEF
Okay 5.6

Entertainment...

Had a tray full of trash most of the way.. don’t they sell trash bags in Iceland?

KEF
SEA
Okay 4.0

Flight attendants were attractive

On the way back sat on plane waiting for 2 hours due to mechanical issues, then 30-94th more hours eating as flight got cancelled. They charged me for bring my boulder pad back.

DEN
KEF
Excellent 8.0

Surprised by very large bag fees, reservation was unclear about baggage allowance and charges.

Show more results

Philadelphia to London Heathrow Flight Information

Avg. Flight Duration 7h 50m
Flights Arrive in London Heathrow
Flights Depart from Philadelphia
Flight Price $562
Distance 3535 miles
Airlines British Airways, Icelandair, Aer Lingus, Turkish Airlines, Finnair
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.