Cheap flights from Philadelphia to Porto

Compare Philadelphia 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 to Porto

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

Find the cheapest month to fly from Philadelphia to Porto

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

Philadelphia to Porto: Alternative routes

Compare routes from Philadelphia 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 found$442
Cheapest month to flyAugust

Finding cheap flights from Philadelphia to Porto: Frequently asked questions

The best price we found for a return flight from Philadelphia to Porto is $609. 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 to Porto. But we found flights with one stop from $609.
As of February 2026, there are no flights flying from Philadelphia to Porto.
The cheapest month to fly from Philadelphia to Porto is usually February.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Philadelphia to Porto Airport on Monday, 23 February 2026.
No airlines currently offer direct flights between Philadelphia 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.
The cheapest airline that flies to Porto is Finnair .

Flying from Philadelphia to Porto Airport (OPO): What you need to know

  • Planning your trip begins with figuring out where you'll fly out of in Philadelphia. Philadelphia International Airport (PHL) is the city's main airport, so check out your options for booking a flight from Philadelphia to Porto Airport (OPO) taking off from here.

  • Porto Airport is located in Porto. The city runs on the UTC+0 timezone and is four hours ahead of Philadelphia.

  • For a smooth journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This will give you enough time to catch your flight from Philadelphia to OPO.

  • With more people on the move during peak seasons, aim to get to your terminal earlier than usual. Two hours for domestic flights and up to four for international journeys will allow for additional wait times.

Airports in Philadelphia

Philadelphia International Airport (PHL)

  • Think about adding a stopover to find cheap flights from Philadelphia to OPO. Just uncheck 'Direct flights only' when browsing departures from Philadelphia International Airport (PHL). Pause your trip (and maybe pocket some savings) with a stop at one of these popular airports:

    • Logan International Airport (BOS)

    • Pearson International Airport (YYZ)

    • Montreal-Pierre Elliott Trudeau International Airport (YUL)

  • Travelling from central Philadelphia to PHL takes around 45 minutes by public transport. If you drive, ride-share or take a cab, you'll cover the 19 kilometres in 15 minutes or so, depending on traffic.

  • Want a hassle-free start to your travels? Stay near Philadelphia International Airport. Whether you've booked an early flight from Philadelphia to Porto Airport or prefer not to feel hurried, these hotels are just what you're after:

  • When it comes to Philadelphia International Airport's on-time performance, data shows 78.93% of flights arrive within the scheduled time frame.

  • You'll find PHL at 8500 Essington Ave.

Trenton-Mercer Airport (TTN)

  • You can reach TTN from the centre of Philadelphia in about 40 minutes by car (depending on traffic conditions). The journey by public transport will take roughly 1 hour 45 minutes to travel the 56 kilometres or so.

  • Want to enjoy an extra night away before boarding your Philadelphia to OPO flight? Unwind in a hotel near Trenton-Mercer Airport before your holiday officially begins. These stays have your key waiting:

  • Flights from Trenton-Mercer Airport have a track record for punctuality, with 82.45% of them touching down within the expected time frame.

  • TTN is located at Scotch Road, Terminal Building.

About Porto Airport (OPO)

  • Consider staying in a hotel near OPO if you're catching a late flight from Philadelphia to Porto Airport. Choose one of these accommodation options and end the night sooner:

  • Pick up a Porto Airport rental car and discover Porto and beyond with your own set of wheels. Klass Wagen, Goldcar and Drive & Go are popular providers to choose from here.

  • Booking your vehicle around three weeks in advance of your Philadelphia to Porto Airport flight can help you get a cheaper deal.

Getting from Porto Airport (OPO) to central Porto

  • Central Porto is roughly 11 kilometres from Porto Airport. Travel times by car hire or cab will vary based on time of day and traffic conditions, so do some research before your trip.

  • If you're using public transport, expect a journey of roughly 50 minutes.

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

  • $442 is currently the best price for a one-way ticket from Philadelphia to Porto Airport. A return flight starts at $609. These prices can change depending on demand and availability.

  • Don't leave everything to the last moment. You're more likely to walk away with cheap flights from Philadelphia to OPO if you book ahead. Airlines often offer some fantastic early bird rates.

  • If you have some flexibility with your travel plans, try using the 'Whole month' tool. It'll give you the lowest price in every month when searching for your Philadelphia to Porto Airport ticket.

  • Save time looking for cheap plane tickets from Philadelphia to OPO by setting up a Price Alert. We'll send you an email or notification on the app when a lower fare becomes available.

  • Filters make it easier to land a deal on your flight from Philadelphia to Porto Airport. Pick the departure times, airlines and number of stops that check all your boxes. Then sort the results by 'Cheapest' to bring up the lowest fares right away.

The best time to fly from Philadelphia to Porto Airport (OPO)

  • It's time to figure out when to book your flight from Philadelphia to Porto Airport (OPO). August is the busiest month to visit Porto. If you like things a bit more low-key, go in February.

  • Before locking in your Philadelphia to OPO plane ticket, consider the kind of weather forecast you're hoping for. August is the warmest month in Porto, with temperatures ranging from 14ºC (57ºF) to 32ºC (90ºF).

  • January has temperatures of between 3ºC (37ºF) and 14ºC (57ºF). Look for cheap tickets from Philadelphia to Porto Airport around that time if you want to travel when it's cooler.

More about Porto

  • Once you've booked your flight from Philadelphia to Porto Airport, find a hotel that offers the right mix of comfort and location. Make one of these options your base for exploring Porto:

  • Ribeira District and Rio Douro are just a couple of the popular attractions to put on your Porto to-do list. Continue your sightseeing adventures at Livraria Lello.

Explore more of Portugal

  • Porto is always a good idea, but there are so many other corners of Portugal just waiting to be explored. Around 290 kilometres south of Porto, a trip to Lisbon will fill your itinerary to the brim. Start with attractions like belém, Pasteis de Belém and Real Mosteiro de Santa Maria de Belém.

  • Amadora is another sought-after destination in Portugal and is around 274 kilometres south of Porto. No journey is complete without seeing Roman Villa, Park Fonte das Avencas and Park Fantasia.

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