Question 1

What are the cheapest airlines flying from Philadelphia to London Heathrow Airport round-trip?

Accepted Answer

Our cheapest airline available from Philadelphia to London Heathrow Airport is Iberia. Our recent data shows that you can find tickets from as low as £451 on this airline. Additional options worth looking into are Air Canada and American Airlines, starting at £451 and £452 round-trip. Users have found that Iberia is 26% cheaper than the other options available to this destination.

Question 2

What are the cheapest airlines to fly from Philadelphia to London Heathrow Airport one-way?

Accepted Answer

The cheapet airlines for a one-way flight from Philadelphia to London Heathrow Airport are Air Canada (£294), JetBlue (£299), and British Airways (£300).

Question 3

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

Accepted Answer

The best time to book flights from Philadelphia to London Heathrow Airport is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Question 4

What is the cheapest month to book a flight from Philadelphia to London Heathrow Airport?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £112). Flying from Philadelphia to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 5

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

Accepted Answer

Travellers seeking maximum savings on their Philadelphia to London Heathrow Airport flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

Weekly flight availability from Philadelphia to London Heathrow Airport

Accepted Answer

The most flights from PHL to LHR are scheduled on a Wednesday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Question 8

E

Accepted Answer

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Question 9

What are the cheapest flights from Philadelphia to London Heathrow Airport?

Accepted Answer

The cheapest flight price from Philadelphia to London Heathrow Airport is £263. On average you can expect to pay £579. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £349.

Question 10

What are the most reliable airlines from Philadelphia to London Heathrow Airport?

Accepted Answer

Consider Aer Lingus (85%), American Airlines (83%) or Finnair (83%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to London Heathrow Airport.

Question 11

What are the most popular airlines that fly from Philadelphia to London Heathrow Airport?

Accepted Answer

When booking a flight from Philadelphia to London Heathrow Airport, you may want to consider flying on JetBlue, British Airways or Aer Lingus as they are the most popular for this route.

Question 12

What is the cheapest day to fly round-trip from Philadelphia to London Heathrow Airport?

Accepted Answer

Wednesday flights are generally found to be more expensive for flights from Philadelphia to London Heathrow Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London Heathrow Airport.

Question 13

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

Accepted Answer

To save on the cost of your flight from Philadelphia to London Heathrow Airport, book at least 34 days before your planned departure. Booking around this time can save you about 35% on the cost of this flight compared to booking a flight leaving this week. We have found prices from £508 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £675.

Question 14

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

Accepted Answer

February is one of the best times of the year to fly to London Heathrow Airport from Philadelphia. Prices for February average £596 per person but you can even find prices for as low as £407. The most expensive prices can be found in the month of June. Opting for a February flight can save you 41% on your journey compared to booking in June

Question 15

What is the cheapest time of day to fly from PHL to LHR?

Accepted Answer

Unlike in the afternoon, when flights are generally more expensive, you can save up to 16% on flights from Philadelphia to London Heathrow Airport by exploring options for tickets at midday.

Question 16

What airport do you fly from for flights from Philadelphia to London Heathrow?

Accepted Answer

Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to London Heathrow. You should not have trouble finding flights to London Heathrow from Philadelphia; the airport handles an average of 9 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 4 airlines have flights from the Philadelphia airport to London Heathrow. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.

Question 17

Can I find deals for flights from Philadelphia to Heathrow that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Philadelphia to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 18

How can I find direct flights from Philadelphia to Heathrow?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Heathrow.

Question 19

Can I find deals for business class flights from Philadelphia to Heathrow?

Accepted Answer

Yes. Cheapflights offers flight deals from Philadelphia to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 20

How does Cheapflights help users find flights from Philadelphia to Heathrow?

Accepted Answer

Cheapflights makes it easy to find Philadelphia to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Question 21

Why should you use Cheapflights to find cheap flight tickets from Philadelphia to Heathrow?

Accepted Answer

Millions of users choose and trust Cheapflights to book the best flight deals from Philadelphia to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Question 22

Can Cheapflights find flights from Philadelphia to Heathrow with no change fees?

Accepted Answer

Need flexible booking options for your flight to Heathrow from Philadelphia? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Question 23

Can Cheapflights notify me if prices for flights from Philadelphia to Heathrow become cheaper?

Accepted Answer

Yes! Start tracking prices for Philadelphia to Heathrow flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

Round-trip from	£451
One-way from	£294
Popular in	June
Cheapest in	October
Average price	£731
Good round-trip deal	£488 or less
Good one-way deal	£328 or less

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest£420	Average£531	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Iberia	Cheapest£427	Average£528	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£461	Average£560	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£485	Average£763	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Cheap flights from Philadelphia to London Heathrow Airport from £286

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 25/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in October or January, booked 56 days in advance, depart on a Tuesday or Friday and return on a Tuesday

Cheap flight deals from Philadelphia to Heathrow

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Find flight deals from Philadelphia to Heathrow

Cheapest flights from Philadelphia to HeathrowExplore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.

Explore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Philadelphia to London Heathrow Airport that are best for you.

Best time to book a flight from Philadelphia to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Philadelphia with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to London Heathrow Airport

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

Use this chart to determine the optimal time to book a return flight from Philadelphia to Heathrow. Price data was last updated on 27 June 2025.

What is the cheapest month to book a flight from Philadelphia to London Heathrow Airport?

What is the cheapest time of day to fly from PHL to LHR?

Find hourly flight availability from Philadelphia to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 July 2025.

Weekly flight availability from Philadelphia to London Heathrow Airport

Explore weekly flight availability from Philadelphia to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 4 July 2025.

How much does it cost for a return flight from Philadelphia to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Delta, KLM, andFinnair from Philadelphia to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Philadelphia to London Heathrow?

What are the cheapest airlines flying from Philadelphia to London Heathrow Airport round-trip?

What are the cheapest airlines to fly from Philadelphia to London Heathrow Airport one-way?

What are the most reliable airlines from Philadelphia to London Heathrow Airport?

What are the cheapest flights from Philadelphia to London Heathrow Airport?

Can I find deals for flights from Philadelphia to Heathrow that include hotel bookings?

How can I find direct flights from Philadelphia to Heathrow?

Can I find deals for business class flights from Philadelphia to Heathrow?

What is the cheapest month to book a flight from Philadelphia to London Heathrow Airport?

Travelling to a place near Philadelphia?

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Alternative routes for Philadelphia to Heathrow

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Top 4 airlines flying from Philadelphia to Heathrow

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How does Cheapflights help users find flights from Philadelphia to Heathrow?

Why should you use Cheapflights to find cheap flight tickets from Philadelphia to Heathrow?

Can Cheapflights find flights from Philadelphia to Heathrow with no change fees?

Can Cheapflights notify me if prices for flights from Philadelphia to Heathrow become cheaper?

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Cheapest flights from Philadelphia to Heathrow
Explore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.