Question 1

Which airline has the best punctuality record on London to Philadelphia flights?

Accepted Answer

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 16% of their flights experiencing any sort of delay.

Question 2

Which stopover airport offers the lowest fares from London to Philadelphia?

Accepted Answer

Flights via Boston (BOS) offer the lowest average return price of £486.

Question 3

Can stopping save me money on London to Philadelphia flights?

Accepted Answer

No. A direct flight is the cheapest option for a flight between London to Philadelphia.

Question 4

Which stopover airport has the shortest travel time from London to Philadelphia?

Accepted Answer

Flights connecting via Montreal (YUL) have the shortest average one-way travel time: 10h 06m.

Question 5

How many flights depart from London to Philadelphia on average per week?

Accepted Answer

70 flights are operational weekly from London to Philadelphia as of December 2025. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.

Question 6

What is the cheapest London to Philadelphia flight route?

Accepted Answer

Fly from London Heathrow to Philadelphia for the best London - Philadelphia flight prices

Question 7

How often are flights from London to Philadelphia delayed?

Accepted Answer

Historically, on average around 18% of flights between London and Philadelphia have experienced a delay on any given week. The average delay length over the past 12 months has been 171 minutes.

Question 8

What is the cheapest month to fly to Philadelphia?

Accepted Answer

If you aren’t able to travel during the month of February, then book flights to Philadelphia from London during September instead. Flights to Philadelphia in September, while not as cheap as those in February, still average around £500.

Question 9

What is the most punctual flight time for London to Philadelphia flights?

Accepted Answer

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Question 10

Which stopover airport has the shortest connection time from London to Philadelphia?

Accepted Answer

Boston (BOS) has the shortest average stopover time for this route: 1h 30m.

Question 11

What is the typical price of a round-trip flight between London and Philadelphia?

Accepted Answer

Prices are currently low for flights on this route.Typical prices usually range from £570 to £825.
The lowest price recently found on this route was £538.

Question 12

What cabin class options are available on London to Philadelphia flights?

Accepted Answer

There are 3 cabin classes available to choose from on London to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Question 13

How far in advance should I book a flight to Philadelphia?

Accepted Answer

You are more likely to see cheaper flights to Philadelphia from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around £569 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from London for as low as £504 on momondo.

Question 14

How many flights depart from London to Philadelphia on average per day?

Accepted Answer

10 flights are operational daily from London to Philadelphia as of December 2025. The most popular departure time for this route is 13:00, with 58% of flights per day taking off in the afternoon.

Question 15

What is the cheapest day to depart on your flight to Philadelphia?

Accepted Answer

Our data shows that Wednesday is the least expensive day to fly to Philadelphia. Tickets to fly out on this day can be as low as £604. On the other hand, Sunday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £653.

Question 16

How have London to Philadelphia flight prices changed over time?

Accepted Answer

As of December 2025, prices for London to Philadelphia flights are approximately 4% cheaper when compared to flights at the same time last year.

Question 17

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Wednesday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Question 18

Which airlines fly to Philadelphia?

Accepted Answer

British Airways, Virgin Atlantic and Lufthansa are the top three most popular airlines that fly to Philadelphia from London according to our data. British Airways is the first choice among our users, with 41% of people opting to fly with this airline when travelling to Philadelphia. Keep in mind that there are 22 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

Question 19

Which airport is the most popular for stopovers for flights between London and Philadelphia?

Accepted Answer

Dublin (DUB) was the most common stop: 86% of momondo users choosing one-stop flights on this route connected there.

Question 20

What is the cheapest time of day to depart on your flight to Philadelphia?

Accepted Answer

The cheapest time of day to fly to Philadelphia is in the afternoon when flights can be purchased for as low as £504. In the morning is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £631 per ticket.

Question 21

What is the cheapest airline that flies from London to Philadelphia?

Accepted Answer

JetBlue and British Airways are the most popular carriers operating from London to Philadelphia

Question 22

When did momondo last update prices for flights from London to Philadelphia Airport?

Accepted Answer

Prices for flights from London to Philadelphia Airport are refreshed on a daily basis.

Question 23

How many operators does momondo search for flights from London to Philadelphia Airport?

Accepted Answer

As of December 2025, there are 10 operators available to choose from for flights from London to Philadelphia Airport.

Question 24

How old do you have to be to fly from London to Philadelphia Airport?

Accepted Answer

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Philadelphia Airport.

Question 25

What documentation or ID do you need to fly to Philadelphia Airport?

Accepted Answer

The travel and health documents you'll need for your trip to Philadelphia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Philadelphia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best price found	£503
Fastest flight time	7h 55m
Direct flights	Every day
Airports in Philadelphia	1 airport

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom £304	Free Cancellation	Rating 7.4 9,065 reviews	Search United Airlines flights
Air Canada	PriceFrom £340	Free Cancellation	Rating 7.1 10,502 reviews	Search Air Canada flights
JetBlue	PriceFrom £393	Free Cancellation	Rating 7.2 2,898 reviews	Search JetBlue flights
Lufthansa	PriceFrom £404	Free Cancellation	Rating 6.8 7,613 reviews	Search Lufthansa flights
British Airways	PriceFrom £440	Free Cancellation	Rating 6.7 7,562 reviews	Search British Airways flights
Finnair	PriceFrom £449	Free Cancellation	Rating 7.6 1,334 reviews	Search Finnair flights
American Airlines	PriceFrom £455	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights
Aer Lingus	PriceFrom £466	Free Cancellation	Rating 7.2 1,385 reviews	Search Aer Lingus flights
Iberia	PriceFrom £471	Free Cancellation	Rating 7.0 3,040 reviews	Search Iberia flights
Virgin Atlantic	PriceFrom £480	Free Cancellation	Rating 7.5 675 reviews	Search Virgin Atlantic flights

Cheap flights from London to Philadelphia from £175

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Philadelphia departing on 15/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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