Cheap Flights from Philadelphia Trenton-Mercer Airport to San Juan from $318 Return

Flight deals from Philadelphia Trenton-Mercer Airport to San Juan

Looking for cheap tickets from Philadelphia Trenton-Mercer Airport to San Juan, or a last-minute trip? Find the lowest prices on one-way and return tickets right here.

San Juan.$318 per passenger.Departing Fri, 10 Apr, returning Fri, 17 Apr.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Philadelphia Trenton-Mercer on Fri, 10 Apr, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Fri, 17 Apr, arriving in Philadelphia Trenton-Mercer.Price includes taxes and charges.From $318, select.

See more deals

Flying from Philadelphia Trenton-Mercer Airport to San Juan

Arm yourself with these facts on the fly.

Cheapest flight found	$318
Cheapest month to fly	April

How to find cheap flights from Philadelphia Trenton-Mercer Airport to San Juan

We've compared the best online travel agents and flight providers on the internet to find the cheapest plane tickets from Philadelphia Trenton-Mercer Airport to San Juan. Other savvy travellers recently found return flights from $318 and one-way tickets from $159. Ready to join them? Here are a few tips to help you do it the smart way.

Fly in April

The cheapest time to fly from Philadelphia Trenton-Mercer Airport to San Juan is currently April.

Flex your dates for the best rates

If you’re flexible on your departure dates, you can use Skyscanner's whole month tool to find the cheapest day of the year to fly from Philadelphia Trenton-Mercer Airport to anywhere you choose in San Juan.

Watch as fares rise and fall

With Price Alerts, we'll let you know when flight prices from Philadelphia Trenton-Mercer Airport to your chosen airport in San Juan go up or down so you can book when the time is just right.

Relax – these are fee-free flight tickets

With us, there are no added fees – the San Juan Airport to San Juan flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

Which other Philadelphia airports offer direct flights to San Juan?

Philadelphia International Airport offers direct flights to San Juan.

What is the average price of a flight from Philadelphia Trenton-Mercer Airport to San Juan?

We looked at all of the upcoming return flights from Philadelphia Trenton-Mercer Airport to San Juan we could find over the next 12 months. It looks like $318 is the best price. This is good, compared to the average San Juan ticket price of $318.

What is the cheapest month to fly from Philadelphia Trenton-Mercer Airport to San Juan?

The cheapest month to fly from Philadelphia Trenton-Mercer Airport to San Juan is currently April.

Which upcoming date is cheapest to fly from Philadelphia Trenton-Mercer Airport to San Juan on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Philadelphia Trenton-Mercer Airport to San Juan on Friday, 10 April 2026.

If I'm flying from Philadelphia Trenton-Mercer Airport, where in San Juan is cheapest to fly into?

If you're flying from Philadelphia Trenton-Mercer, the cheapest city in San Juan to fly into is San Juan. The cheapest airport serving San Juan at the moment is San Juan Luis Munoz Marin.