PHL - OPO

$317 Find Cheap Flights from Philadelphia to Porto - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Porto departing on 10/20. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Porto, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Porto, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$701
Typical prices: $653-$547
United Airlines
Tue 11/10Tue 11/17
PHL - OPO • 2 stops
Cheapest one-way
$317
Typical prices: $336-$422
Multiple Airlines
Tue 10/20
PHL - OPO • 3 stops
Top airlines
Cheapest • from $701 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Philadelphia and Porto. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $832 (round-trip)
Shortest trip • 10h 49m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 40% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Philadelphia to Porto (PHL-OPO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Porto

Tue, Nov 10 - Tue, Nov 17
United Airlines Logo
10:15 am - 9:30 am
PHL
-
OPO
18h 15m
2 stops
United Airlines Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$701United Airlines
Tue, Nov 10 - Tue, Nov 17
Lufthansa Logo
5:40 pm - 11:45 am
PHL
-
OPO
13h 05m
1 stop
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$706Lufthansa
Tue, Nov 10 - Tue, Nov 17
Delta Logo
12:09 pm - 10:30 am
PHL
-
OPO
17h 21m
2 stops
Delta Logo
5:00 am - 10:56 pm
OPO
-
PHL
22h 56m
2 stops
$711Delta
Mon, Nov 16 - Fri, Nov 20
Iberia Logo
7:50 pm - 8:00 pm
PHL
-
OPO
19h 10m
1 stop
Iberia Logo
8:20 am - 3:50 pm
OPO
-
PHL
12h 30m
1 stop
$743Iberia
Fri, Nov 13 - Tue, Nov 17
Multiple Airlines Logo
1:00 pm - 9:30 am
PHL
-
OPO
15h 30m
2 stops
Multiple Airlines Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$751Multiple Airlines
Sun, Nov 8 - Sat, Nov 14
Multiple Airlines Logo
3:20 pm - 12:50 pm
PHL
-
OPO
16h 30m
2 stops
Multiple Airlines Logo
12:05 pm - 2:44 pm
OPO
-
PHL
55h 39m
2 stops
$758Multiple Airlines
Mon, Nov 16 - Fri, Nov 20
Multiple Airlines Logo
7:50 pm - 8:00 pm
PHL
-
OPO
19h 10m
1 stop
Multiple Airlines Logo
8:20 am - 9:26 pm
OPO
-
PHL
18h 06m
2 stops
$759Multiple Airlines
Sun, Nov 8 - Sun, Dec 6
Multiple Airlines Logo
3:20 pm - 12:50 pm
PHL
-
OPO
16h 30m
2 stops
Multiple Airlines Logo
6:00 am - 3:51 pm
OPO
-
PHL
38h 51m
2 stops
$760Multiple Airlines
Fri, Nov 13 - Tue, Nov 17
United Airlines Logo
1:00 pm - 9:30 am
PHL
-
OPO
15h 30m
2 stops
United Airlines Logo
6:00 am - 12:25 pm
OPO
-
PHL
35h 25m
2 stops
$761United Airlines
Fri, Nov 13 - Tue, Nov 17
Multiple Airlines Logo
7:50 pm - 8:00 pm
PHL
-
OPO
19h 10m
1 stop
Multiple Airlines Logo
8:40 pm - 3:50 pm
OPO
-
PHL
24h 10m
1 stop
$765Multiple Airlines
Booking Insights

KAYAK's insights & trends for Philadelphia to Porto flights

Get data-powered insights and trends into flights from Philadelphia to Porto to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Philadelphia to Porto?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Philadelphia to Porto departing in November.

What is the cheapest month to fly from Philadelphia to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Porto, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to Porto is January, where tickets cost $496 (return) on average. On the other hand, the most expensive months are February and July, where the average cost of round-trip tickets is $1,224 and $1,142 respectively.

Good to know

Low seasonJanuary
Cheapest flight$317
Best time to beat the crowds with an average 41% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Philadelphia to Porto

When to book flights from Philadelphia to Porto

Are your dates flexible? Find out the best times to travel from Philadelphia to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Porto

  • What is the cheapest flight from Philadelphia to Porto?

    In the last 5 days, the lowest price for a flight from Philadelphia to Porto was $317 for a one-way ticket and $701 for a round-trip.

  • Do I need a passport to fly between Philadelphia and Porto?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Philadelphia and on arrival in Porto.

  • Which aircraft models fly most regularly from Philadelphia to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Philadelphia to Porto?

    Star Alliance, and oneworld are the airline alliances operating flights between Philadelphia and Porto, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Philadelphia to Porto, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Philadelphia to Porto are United Airlines and American Airlines. With an average price for the route of $840 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $1,161 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Philadelphia to Porto?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Porto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Porto?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and OPO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Porto?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Philadelphia to Porto

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Porto? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9834 reviews
7.7Boarding
7.1Entertainment
8.1Crew
6.6Food
7.3Comfort
Airline reviews

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

2.0 MediocreAnonymous, Jun 2026
ORD - BHM
Read more United Airlines reviews

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

The entertainment they offer could use some games, and maybe they could add some cookies to the snack menu. And the automated messages are a bit repetitive. But it was comfortable temperature wise and the seats were comfortable. The crew is very polite and helpful

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

This planes staff was top tier. Everything went great and had a great flight home.

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

This was an overnight flight, and in the morning they did know coffee service. How you can throw passengers in a San Francisco airport at 5:40 a.m. in the morning and not giving them Coffee is a crime.

I was promised by United Airline (operated by ANA) that I will be seated together with my kids as I am the only adult flying with two minors. We did not get seats together in our 11 hours flight from LA to Tokyo. When asked at the gate, ANA representative said United Airline should have informed them that there is a parent flying with two minors. He said they can’t do anything in the system as the flight is full. He ask me to ask passengers next to me and the kids if they are willing to change seats. This is ridiculous! However, I went in the flight and asked other passages but no one willing to change seats. 11 hours and we were seating separately. I was very disappointed with this. It made things super inconvenient for me.

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

Flight cancelled instead of leaving Friday am now, maybe, leaving Sunday

The pilot had to extend the flight time from san antonio to Houston to burn off fuel. This caused a lot of unnecessary stress since we had a tight connection to Aruba. And with no other flights going to Aruba we were worried about spending a night in Houston. We had to to run to our connection because of the flight crews mistake. Not happy.

The check in agents in PHL and gate agents had to have been the rudest women that I have ever encountered; the agent weighing the bags at check in screamed continuously at all of the guests as did the woman at the gate.I have Executive Platinum status with AA and fly a lot with AA but these ladies were the absolute worst I had the displeasure to encounter!

Delayed delayed. Poor professionalism. Our seats changed and we pay for them

Fine. Nothing to write home about. The plane left on time, and arrived on time.

Flight left early and arrived 30 MINUTES early at the destination. Smooth trip.

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

I appreciate that I finally got the seat I paid extra for this time. Thank you

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

It would have been nice if American tried to care.

Not bad but they lost 2 of my bags when I got to Florence

Puddle-hopper. Quick-ish flight. Don’t expect to have much/any in-flight entertainment (movies/TV, etc).

Couldn’t get boarding passes online, delayed an hour, and smallest amount of space on board I’ve ever encountered for such a long flight.

In general, I've had excellent experiences with Iberia flights and will continue to use them. In this last flight there were two things that didn't go right. I didn't get the kosher meal I had pre-requested when I had checked in on-line. Things worked out OK as we ended up eating the fish and vegetarian choices, which were really good. The other issue was that some movies for me and my wife started fine but after 8-12 minutes the content just switched to something else. The flight attendant reset our entertainment systems, but the problem persisted. We ended up choosing other movies/TV shows that did work fine.

Awful. They didn't even show concern that her connecting flight( Dallas to Mardrid) was gone/missing. I don't understand how that is even possible. Rudest answer from one of the crew was that American Airlines sold the tickets to somebody else. My daughter was not in the list.

The flight was canceled on a Thursday last minute. I lost thousands of dollars in hotels and car rental

Excellent lie flat seat for premium economy! Great staff. Bad food . Not so great entertainment. My bag didn’t make it either.

Really like the idea experience on this airline I will use again

Plane delayed due to weather. Plane boarded, then told to unboard due to a maintenance issue.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

We sat in our seats on the tarmac for almost 3 hours due to storms. They would not give us water or a snack. We were to depart at 7.30 pm and it was about 10.30 when we took off. No dinner until much after that. Beef type noodle dish was terrible with about a teaspoon of beef in it. The breakfast sweet waffle with egg and sausage inside was horrible. An English muffin sandwich would have been much better. Food was the worst in all of our years of traveling the world.

Our screen kept turning off ...3 times...had to get crew attention to turn it on again

They messed up my seat so I didn’t get the one I paid for

Put me on standby; flight was late; missed my connecting flight; disaster

Flight attendants were fine, seats a bit hard but I use a cushion for extra support. The only issue was it was a bit too cool and I needed to ask for and received and extra blanket. I survived!!!

Very few things and/or people are excellent. It was very good.

Extremely uncomfortable seats. Experience was like a Frontier Airlines flight. Would not fly it again.

Very, very tight legroom. They must’ve jammed in an additional few rows of seat seating. Denver to Munich was the least legroom I’ve ever had on any flight, let alone a multi hour international journey. I will not take that flight again.

In my first flight with Air Canada we sat in the plane for 4:00pm to 6:30pm. Finally we were asked to get off the plane and we were told the flight was cancelled after 7:00pm There was o clear explanation of what was the problem. I was booked without my permission on a Delta Flight at 7:30pm that was leaving at 8:00pm and I still had to go get my luggage(my final destination was Rome with one stop in Toronto. The luggage claim for Canada was closed so had to return to finally get it on the luggage belt.. Of course I missed the Delta flight and all the next day flights were booked. I also lost what I paid for my stay in Rome because I did nt cancel in time. A complete nightmare.

Good food, overall very comfy. The flight was full so obviously not optimal, but it is what it is.

Everything you need to know for your flight from Philadelphia to Porto

Information on your arrival and departure airports