Cheap Flights from London (LOND) to Philadelphia Trenton-Mercer (TTN)

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Flight deals from London to Philadelphia Trenton-Mercer

Looking for a cheap last-minute deal or the best return flight from London to Philadelphia Trenton-Mercer Airport? If you want to travel next month, return fares start from £628. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from London to Philadelphia Trenton-Mercer

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London to Philadelphia Trenton-Mercer flights are currently cheapest in September.

London to Philadelphia: Flight information

The things to know before you go.
Cheapest flight found£279
Cheapest month to flySeptember

Finding cheap flights from London to Philadelphia Trenton-Mercer: Frequently asked questions

The best price we found for a return flight from London to Philadelphia Trenton-Mercer is £603. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from London to Philadelphia Trenton-Mercer. But we found flights with one stop from £603.
As of June 2026, there are no flights flying from London to Philadelphia Trenton-Mercer.
The cheapest month to fly from London to Philadelphia Trenton-Mercer is usually June.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from London to Philadelphia Trenton-Mercer Airport on Tuesday, 16 June 2026.
No airlines currently offer direct flights between London and Philadelphia Trenton-Mercer Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Philadelphia Trenton-Mercer but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Philadelphia is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Philadelphia Trenton-Mercer is Norse Atlantic Airways (UK) .

Travelling from London to Trenton-Mercer Airport (TTN): What you need to know

  • Take your pick of a range of airports when planning a flight from London to Trenton-Mercer Airport (TTN). Explore your options for leaving London Heathrow Airport (LHR), London Gatwick Airport (LGW) or Stansted Airport (STN). London Luton Airport (LTN) and London City Airport (LCY) also service London.

  • Trenton-Mercer Airport is located in Philadelphia. The city runs on the UTC-4 timezone and is four hours behind London.

  • Arrive at the airport on time so you don't miss your flight from London to TTN. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid the mad dash to your gate.

  • High season means busier airports, so be there even earlier. Give yourself at least two hours before a domestic flight and four hours for an international journey to keep to your schedule.

Airports in London

London Heathrow Airport (LHR)

  • We make it a breeze to book cheap flights from London to TTN that include a stopover. To explore the options leaving from London Heathrow Airport (LHR), uncheck 'Direct flights only.' Then, select a flight offering a stop long enough to tour your chosen city. Top stopovers between LHR and TTN include:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • Orlando International Airport (MCO)

    • Tampa International Airport (TPA)

  • LHR is about 31 kms (19 miles) from central London. If you're catching a cab, driving or ride-sharing from the centre, it'll take 55 minutes or so to get there, depending on the traffic. If you're planning to take public transport, expect the trip time to be around 1 hour.

  • Have an early flight from London to Trenton-Mercer Airport? Avoid the last-minute rush to the terminal (and sneak in some extra snooze time) by picking one of these stays close to London Heathrow Airport:

  • Of the flights that depart from London Heathrow Airport, 68.18% land on schedule at their destination.

London Gatwick Airport (LGW)

  • Squeeze in an extra adventure with a stopover on your flight from London to Trenton-Mercer Airport. Orlando International Airport (MCO) is one of the options between London Gatwick Airport and TTN.

  • LGW is about 80 kms (50 miles) from central London. It takes 1 hour 20 minutes or so to get to the airport driving from the city centre. Public transport takes approximately 30 minutes.

  • Get a head start on your holiday with an additional night away from home. Before catching your London to TTN flight, kick back in one of these hotels close to London Gatwick Airport:

  • When it comes to keeping flights on track, London Gatwick Airport has an on-time arrival rate of 69.26%.

Stansted Airport (STN)

  • STN is around 64 kms (40 miles) from central London. The drive from the city centre to the terminal takes about 1 hour. If you're thinking about using public transport, expect a journey time of around 1 hour 25 minutes.

  • Relax in bed for a little longer and still make your London to Trenton-Mercer Airport flight without having to rush. These accommodation options near Stansted Airport make departure day a breeze if you're setting off early:

  • The on-time performance record of STN is 64.73%. In other words, that's how frequently flights from this airport arrive within the expected time frame.

About Trenton-Mercer Airport (TTN)

Getting from Trenton-Mercer Airport (TTN) to central Philadelphia

  • Trenton-Mercer Airport is about 30 miles from central Philadelphia. How long it takes to get to the centre by cab or car hire depends on the time of day. Do a little research before your trip.

  • It takes roughly 1 hour 45 minutes if you're using public transport.

How to find the cheapest flights from London to Trenton-Mercer Airport (TTN)

  • At the moment, £279 is the best price we've found for a one-way ticket from London to Trenton-Mercer Airport. The cheapest price for a return flight is £603. Keep in mind fares may change due to availability at the time of booking.

  • To find cheap flights from London to TTN, book early. Airlines typically offer lower fares when flights first go on sale.

  • The 'Whole month' search tool shows you the cheapest London to Trenton-Mercer Airport tickets across each month. It's an easy way to find a bargain if your travel plans are flexible.

  • Stay on top of deals for plane tickets from London to TTN by setting up a Price Alert. We'll send you an email or notification on the app when a lower fare pops up.

  • Find an affordable flight from London to Trenton-Mercer Airport by using filters. Select your preferred duration, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

The best time to fly from London to Trenton-Mercer Airport (TTN)

  • Think about your travel style when deciding the best time to fly. April is the quietest month to go to Philadelphia. August is when most people book flights from London to Trenton-Mercer Airport (TTN), which may be perfect if you're chasing more excitement.

  • When booking your London to TTN plane ticket, consider the kind of weather you prefer. July is the warmest month in Philadelphia, with temperatures ranging from 18ºC (64ºF) to 32ºC (90ºF).

  • If you want to travel in cooler conditions, look for a cheap ticket from London to Trenton-Mercer Airport in January when temperatures are between -7ºC (19ºF) and 9ºC (48ºF).

More about Philadelphia

Explore more of the United States

  • Philadelphia has plenty to offer, but there are so many other corners of the United States just waiting to be explored. Around 80 kms (50 miles) north-east of Philadelphia, a visit to New York will keep you on the move. Start with leading attractions like Central Park, Manhattan Skyline and Statue of Liberty.

  • Baltimore is another must-experience destination in the United States and is around 193 kms (120 miles) south-west of Philadelphia. No journey is complete without experiencing Baltimore Aquarium, National Aquarium and Washington Monument and Mount Vernon Place.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.