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Cheap flights from London Luton Airport to Philadelphia from £344

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 Luton Airport to Philadelphia departing on 21/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags
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Find the cheapest flights from London Luton Airport to Philadelphia

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
08:15 - 18:55
LTN
-
PHL
15h 40m
1 stop
Multiple Airlines Logo
20:25 - 17:25
PHL
-
LTN
16h 00m
1 stop
£658Multiple Airlines
Mon, 13 Jul - Fri, 17 Jul
Multiple Airlines Logo
09:25 - 18:55
LTN
-
PHL
14h 30m
1 stop
Multiple Airlines Logo
08:50 - 09:30
PHL
-
LTN
19h 40m
2 stops
£666Multiple Airlines
Thu, 2 Jul - Thu, 9 Jul
Multiple Airlines Logo
09:40 - 18:55
LTN
-
PHL
14h 15m
1 stop
Multiple Airlines Logo
09:26 - 09:15
PHL
-
LTN
18h 49m
2 stops
£667Multiple Airlines
Tue, 21 Jul - Tue, 28 Jul
Multiple Airlines Logo
09:25 - 18:55
LTN
-
PHL
14h 30m
1 stop
Multiple Airlines Logo
20:25 - 13:25
PHL
-
LTN
12h 00m
1 stop
£684Multiple Airlines
Thu, 18 Jun - Sun, 21 Jun
Multiple Airlines Logo
19:55 - 14:49
LTN
-
PHL
23h 54m
3 stops
Multiple Airlines Logo
10:05 - 14:35
PHL
-
LTN
23h 30m
3 stops
£687Multiple Airlines
Thu, 2 Jul - Thu, 9 Jul
Multiple Airlines Logo
08:30 - 14:49
LTN
-
PHL
35h 19m
3 stops
Multiple Airlines Logo
16:20 - 19:15
PHL
-
LTN
21h 55m
2 stops
£696Multiple Airlines
Thu, 16 Jul - Thu, 30 Jul
Multiple Airlines Logo
08:15 - 18:55
LTN
-
PHL
15h 40m
1 stop
Multiple Airlines Logo
20:25 - 15:45
PHL
-
LTN
14h 20m
1 stop
£697Multiple Airlines
Mon, 20 Jul - Mon, 27 Jul
Multiple Airlines Logo
09:25 - 18:55
LTN
-
PHL
14h 30m
1 stop
Multiple Airlines Logo
08:28 - 08:20
PHL
-
LTN
18h 52m
2 stops
£699Multiple Airlines
Thu, 6 Aug - Sat, 15 Aug
Multiple Airlines Logo
08:15 - 18:55
LTN
-
PHL
15h 40m
1 stop
Multiple Airlines Logo
20:25 - 15:45
PHL
-
LTN
14h 20m
1 stop
£705Multiple Airlines
Mon, 20 Jul - Mon, 27 Jul
Multiple Airlines Logo
19:55 - 14:49
LTN
-
PHL
23h 54m
3 stops
Multiple Airlines Logo
17:40 - 14:35
PHL
-
LTN
15h 55m
2 stops
£726Multiple Airlines
Thu, 2 Jul - Thu, 9 Jul

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Customise your flight search to find flights from London Luton Airport to Philadelphia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 8 June 2026.
Use the filters below to find and compare flights from London Luton Airport to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Mon 13/7

08:15-18:55

1 stop15h 40m

Philadelphia

Fri 17/7

20:25-17:25

1 stop16h 00m

£658

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Thu 2/7

09:25-18:55

1 stop14h 30m

Philadelphia

Thu 9/7

08:50-09:30

2 stops19h 40m

£666

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Tue 21/7

09:40-18:55

1 stop14h 15m

Philadelphia

Tue 28/7

09:26-09:15

2 stops18h 49m

£667
Fastest return journey

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Thu 18/6

09:25-18:55

1 stop14h 30m

Philadelphia

Sun 21/6

20:25-13:25

1 stop12h 00m

£684

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Thu 2/7

19:55-14:49

3 stops23h 54m

Philadelphia

Thu 9/7

10:05-14:35

3 stops23h 30m

£687

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Thu 16/7

08:30-14:49

3 stops35h 19m

Philadelphia

Thu 30/7

16:20-19:15

2 stops21h 55m

£696

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Mon 20/7

08:15-18:55

1 stop15h 40m

Philadelphia

Mon 27/7

20:25-15:45

1 stop14h 20m

£697

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Thu 6/8

09:25-18:55

1 stop14h 30m

Philadelphia

Sat 15/8

08:28-08:20

2 stops18h 52m

£699

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Mon 20/7

08:15-18:55

1 stop15h 40m

Philadelphia

Mon 27/7

20:25-15:45

1 stop14h 20m

£705

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Thu 2/7

19:55-14:49

3 stops23h 54m

Philadelphia

Thu 9/7

17:40-14:35

2 stops15h 55m

£726

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from London Luton Airport to Philadelphia

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 cheapest day to depart on your flight to Philadelphia?

Our data shows that Tuesday is the least expensive day to fly to Philadelphia. Tickets to fly out on this day can be as low as £608. On the other hand, Sunday is the most expensive day to depart from London Luton Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £681.

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

The cheapest time of day to fly to Philadelphia is in the morning when flights can be purchased for as low as £637. At midday is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £646 per ticket.

When to book flights from London Luton Airport to Philadelphia

Are you open to changing your travel dates? Check out the ideal times to fly from London Luton Airport to Philadelphia according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Luton Airport to Philadelphia (LTN to PHL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Luton Airport to Philadelphia

Fastest flight time

12h 55m

Direct flights

None
The fastest flight from London Luton Airport to Philadelphia takes 12h 55m
There are no direct flights from London Luton Airport to Philadelphia. There are no popular flight routes from London Luton Airport to Philadelphia.
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Frequently asked questions about flying from London Luton Airport to Philadelphia

  • How far is London Luton to Philadelphia by plane?

    London Luton and Philadelphia are 3521.0 mi apart from one another. 12h 55m is a normal flight duration for this route.

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

    Prices for flights from London Luton Airport to Philadelphia Airport are updated daily.

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

    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 London Luton Airport to Philadelphia Airport.

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

    The required travel and health documents for your Philadelphia Airport 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 Philadelphia Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Travelling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Newark
Vineland
King of Prussia
Dover
Reading
Rehoboth Beach
Essington
Ephrata
West Chester
Cherry Hill
Dewey Beach

Why use momondo?

Why should I use momondo to find a flight deal from London to Philadelphia?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Philadelphia for you.

Can I find flights from London to Philadelphia with flexible booking policies on momondo?

momondo does allow users to show only those flights to Philadelphia from London which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from London to Philadelphia?

Once you have performed a search for London to Philadelphia 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 London to Philadelphia right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of London to Philadelphia flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Philadelphia trip

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