Cheap Flights from Philadelphia International to Porto

Compare Philadelphia International to Porto flight deals

Find the cheapest month or even day of the year to fly to Porto

Book the best Porto fare with no extra fees

Flight deals from Philadelphia International to Porto

Looking for a cheap last-minute deal or the best return flight from Philadelphia International to Porto? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Philadelphia International to Porto

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia International to Porto flights are currently cheapest in February.

Philadelphia International to Porto: Alternative routes

Compare routes from Philadelphia International to Porto below. You may find an airport to fly into that's cheaper, faster, or easier than Porto.

Philadelphia to Porto: Flight information

The things to know before you go.
Cheapest flight foundR 5,307
Cheapest month to flyFebruary

Finding cheap flights from Philadelphia International to Porto: Frequently asked questions

The best price we found for a return flight from Philadelphia International to Porto is R 7,761. 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 Philadelphia International to Porto. But we found flights with one or more stops from R 7,761.
As of February 2026, there are no flights flying from Philadelphia International to Porto.
The cheapest month to fly from Philadelphia International to Porto is usually February.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to Porto Airport on Monday, 23 February 2026.
No airlines currently offer direct flights between Philadelphia International Airport and Porto 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 Porto 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 Porto is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Finnair offers the cheapest flight tickets to Porto.

Flying from Philadelphia International Airport (PHL) to Porto Airport (OPO): what you need to know

  • Porto is four hours ahead of Philadelphia and is in the UTC+0 timezone.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This way, you can comfortably catch your PHL to OPO flight.

  • You'll likely experience longer lines in popular months such as August. Arriving up to four hours ahead of an international flight and two hours for domestic departures will help ensure a smooth travel experience.

  • If you want to break up your flight, just uncheck 'Direct flights only' when searching for your ticket from Philadelphia International Airport to Porto Airport. Here are the most popular stopovers between PHL and OPO:

    • Logan International Airport

    • Pearson International Airport

    • Montreal-Pierre Elliott Trudeau International Airport

How to find the cheapest flights from Philadelphia International Airport (PHL) to Porto Airport (OPO)

  • R 5,307 is the best price for a one-way Philadelphia International Airport to Porto Airport flight. A return flight starts from R 7,761. These fares may change based on availability and demand.

  • It's a good idea to book ahead of time if you want to get cheap tickets from PHL to OPO. That's because flight prices are based on demand, which tends to rise closer to the date of departure.

  • If you're willing to be flexible with your travel dates, try using the 'Whole month' search function. It'll show you the cheapest price in each month when looking for your flight from Philadelphia International Airport to Porto Airport.

  • Save time searching for cheap flights from PHL to OPO by setting up a Price Alert. You'll receive an email or push notification on the app when a new discounted fare appears.

  • Tailor your trip using filters. Choose your preferred departure and arrival times, airlines and total journey duration. You can also sort your results by 'Fastest,' 'Cheapest' or 'Best' flights from Philadelphia International Airport to Porto Airport.

Handy information about Philadelphia International Airport (PHL)

  • The address for PHL is Industrial Highway and Island Road.

  • Of the flights that depart from Philadelphia International Airport, 78.93% touch down on time at their destination.

  • Philadelphia International Airport is around 19 kilometres from central Philadelphia. If you're ride-sharing, catching a cab or driving from the centre, it'll take 15 minutes or so to get there, depending on the traffic.

  • The journey when using public transport usually takes 45 minutes.

  • Catching an early flight from Philadelphia International Airport to Porto Airport? Avoid rushing to the airport (and catch some extra z's) by picking one of these hotels near PHL:

Arriving at Porto Airport (OPO)

  • Book a hotel close to OPO if you're catching a late Philadelphia International Airport to Porto Airport flight. Pick one of these accommodation options and avoid the hassle of a long transfer:

  • Get your adventure underway by picking up a Porto Airport rental car. Grab a set of wheels from Klass Wagen, Goldcar or Drive & Go and explore beyond Porto's main sights.

  • Reserving your vehicle from Porto Airport about three weeks in advance can help you secure the lowest rate.

Getting from Porto Airport (OPO) to central Porto

  • From Porto Airport, Porto is approximately 16 kilometres away. It takes around 20 minutes to get to the centre driving.

  • Travelling on public transport takes around 50 minutes.

When to fly to Porto Airport (OPO)

  • The quietest month for a flight from Philadelphia International Airport to Porto Airport is January, while August is the busiest. Pick the best time to go to Porto based on whether you prefer a faster pace or a more relaxed vibe.

  • Lock in your flight from Philadelphia International Airport to Porto Airport for August if you'd like to explore Porto during its warmest month. You can expect temperatures of between 14ºC (57ºF) and 32ºC (90ºF).

  • If you want cooler conditions, look for a cheap ticket from PHL to OPO in January. Average temperatures are between 3ºC (37ºF) and 14ºC (57ºF) then.

Explore more of Portugal

  • Lisbon is just one of the many places in Portugal waiting to be discovered once you've taken in the sights of Porto. Around 274 kilometres away to the south, its best attractions include Torre de Belem Garden, Estrela At Lisbon - Tram 28 and Archaeological museum of Sao Jorge Castle.

  • Around 274 kilometres south of Porto, Amadora is another essential stop in Portugal. Start your sightseeing at Jardim Porta do Viveiro Alfragide, Jardim Caracol do Victor Alfragide and Jardim e estatua Eduardo Jorge.

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