Cheap flights from Philadelphia to London from $199
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to London departing on 7/14. 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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How to get the cheapest flight ticket from Philadelphia to London
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between Philadelphia and London?
What is the cheapest month to fly to London?
The cheapest month to fly to London from Philadelphia is in February. Flight prices, which tend to average around $664, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Philadelphia averaging around $683.
What is the cheapest day to depart on your flight to London?
The cheapest day to depart from Philadelphia to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $798. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $986. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.
What is the cheapest time of day to depart on your flight to London?
Flying to London from Philadelphia at noon is the least expensive time of day to depart. momondo users have found prices as low as $764 when looking at flights departing at noon. Flights to London are more costly in the afternoon, with an average ticket price of $886. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Philadelphia to London flight route?
Fly from Philadelphia to London Heathrow for the best Philadelphia - London flight prices
How far in advance should I book a flight to London?
You are more likely to see cheaper flights to London from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $841 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Philadelphia for as low as $714 on momondo.
What cabin class options are available on Philadelphia to London flights?
There are 3 cabin classes available to choose from on Philadelphia to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on Philadelphia to London flights?
You could potentially save up to 4% on your flight if you consider stops on a Philadelphia to London flight.
How have Philadelphia to London flight prices changed over time?
As of July 2025, prices for Philadelphia to London flights are approximately 2% more expensive when compared to flights at the same time last year.
How many flights depart from Philadelphia to London on average per day?
As of July 2025, 14 flights take off from Philadelphia and land in London each day. The most common flight departure time for this route is 6:00PM, with 100% of daily flights taking off in the evening.
How many flights depart from Philadelphia to London on average per week?
As of July 2025, 100 flights take off from Philadelphia and land in London each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.
When to book flights from Philadelphia to London
Cheap Philadelphia to London (PHL to LON) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Philadelphia to London
How far is Philadelphia to London by plane?
A flight from Philadelphia to London will travel around 3538.9 mi. Typically, this will take 7h 05m by plane in normal conditions.
When did momondo last update prices for flights from Philadelphia Airport to London?
Prices for flights from Philadelphia Airport to London refresh daily.
How many operators does momondo search for flights from Philadelphia Airport to London?
The number of operators available for flights from Philadelphia Airport to London is 7 as of July 2025.
How old do you have to be to fly from Philadelphia Airport to London?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to London.
What documentation or ID do you need to fly to London?
The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Philadelphia to London?
Based on momondo bookings for flights between Philadelphia and London, the leading plane model is Boeing 787-9 Dreamliner, making up 47.36% of the total bookings. Other popular models include Airbus A350-1000 with 43.13%, Boeing 787-8 Dreamliner with 3.70%, and Boeing 787 Dreamliner with 3.08%.
What is the most popular airline from Philadelphia to London?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Philadelphia to London is British Airways (37% of total bookings). The next most popular airlines are Iberia (24%), American Airlines (18%), and Aer Lingus (7%).
Best airlines flying from Philadelphia to London
Compare and see reviews for airlines that fly from Philadelphia to London with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $547 | Free Cancellation | Rating 7.3 2,910 reviews | |||
| PriceFrom $560 | Free Cancellation | Rating 6.6 7,096 reviews | |||
| PriceFrom $580 | Free Cancellation | Rating 7.1 1,151 reviews | |||
| PriceFrom $610 | Free Cancellation | Rating 7.0 2,820 reviews | |||
| PriceFrom $630 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $635 | Free Cancellation | Rating 7.6 1,312 reviews | |||
| PriceFrom $673 | Free Cancellation | Rating 7.4 8,844 reviews |
Finnair Flights From Philadelphia to London
Finnair operates around 20 flights from Philadelphia to London every week. The average price of these flights found in the last 72 hours has been $791, but momondo users have found Finnair deals from Philadelphia to London from as low as $635 round-trip. Finnair has been scored 7.6/10 in 1,311 reviews.
American Airlines Flights From Philadelphia to London
$630 is the best American Airlines flight deal from Philadelphia to London found on momondo over the last 72 hours. The average American Airlines ticket price found was closer to $872, however, with flight time and availability significantly affecting the price. American Airlines (7.2/10 from 10,000 user reviews) flies into London from Philadelphia 20 times in an average week so prices can vary.
Traveling to a place near London?
Book flights to London if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Philadelphia to London?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Philadelphia.
Can I find flights from Philadelphia to London with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Philadelphia to London flights to just show those with flexible booking policies.
How can momondo help me find flights from Philadelphia to London?
Once you have performed a search for Philadelphia to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Philadelphia to London right now. Can momondo alert me if prices change?
Price alerts on flights to London from Philadelphia are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.