PHL - OPO

$341 Find Cheap Flights from Philadelphia to Porto

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 5/3. 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

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Everything you should know

Cheapest round-trip
$624
Overall average: $768
Delta
Tue 4/14Fri 4/24
PHL - OPO • 2 stops
Cheapest one-way
$341
Typical prices: $331-$849
Multiple Airlines
Sun 5/3
PHL - OPO • 3 stops
Top airlines
Cheapest • from $624 (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 $808 (round-trip)
Shortest trip • 10h 57m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 38% 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, Apr 14 - Fri, Apr 24
Delta Logo
6:58 pm - 6:20 pm
PHL
-
OPO
18h 22m
2 stops
Delta Logo
5:55 am - 10:50 pm
OPO
-
PHL
21h 55m
2 stops
$624Delta
Tue, Apr 14 - Fri, Apr 24
Lufthansa Logo
5:40 pm - 11:25 pm
PHL
-
OPO
24h 45m
2 stops
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$634Lufthansa
Thu, Apr 9 - Wed, Apr 22
Lufthansa Logo
5:40 pm - 11:15 am
PHL
-
OPO
12h 35m
1 stop
Lufthansa Logo
4:35 pm - 4:05 pm
OPO
-
PHL
28h 30m
1 stop
$637Lufthansa
Thu, Apr 9 - Wed, Apr 22
Delta Logo
12:26 pm - 10:00 pm
PHL
-
OPO
28h 34m
2 stops
Delta Logo
5:00 am - 7:18 pm
OPO
-
PHL
19h 18m
2 stops
$650Delta
Tue, Aug 4 - Tue, Aug 25
United Airlines Logo
10:05 am - 7:00 am
PHL
-
OPO
15h 55m
1 stop
United Airlines Logo
12:15 pm - 2:08 pm
OPO
-
PHL
30h 53m
2 stops
$654United Airlines
Tue, Apr 14 - Fri, Apr 24
Lufthansa Logo
5:40 pm - 11:25 pm
PHL
-
OPO
24h 45m
2 stops
Lufthansa Logo
6:20 am - 4:05 pm
OPO
-
PHL
14h 45m
2 stops
$658Lufthansa
Tue, Aug 4 - Tue, Aug 25
United Airlines Logo
3:10 pm - 7:00 am
PHL
-
OPO
34h 50m
2 stops
United Airlines Logo
12:15 pm - 2:08 pm
OPO
-
PHL
30h 53m
2 stops
$659United Airlines
Tue, Apr 14 - Fri, Apr 24
Lufthansa Logo
5:40 pm - 11:25 pm
PHL
-
OPO
24h 45m
2 stops
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$660Lufthansa
Sun, Apr 19 - Thu, Apr 30
Lufthansa Logo
5:40 pm - 11:25 pm
PHL
-
OPO
24h 45m
2 stops
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$661Lufthansa
Thu, Apr 9 - Thu, Apr 16
Lufthansa Logo
5:40 pm - 11:15 am
PHL
-
OPO
12h 35m
1 stop
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$662Lufthansa
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.

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 June, where the average cost of round-trip tickets is $978 and $977 respectively.

Good to know

Low seasonJanuary
Cheapest flight$341
Best time to beat the crowds with an average 38% drop 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 3 days, the lowest price for a flight from Philadelphia to Porto was $341 for a one-way ticket and $624 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 $795 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 $868 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 9431 reviews
6.6Food
7.1Entertainment
7.3Comfort
8.1Crew
7.7Boarding
Airline reviews

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

2.0 MediocreMary Ann, Mar 2026
EWR - MCO
Read more United Airlines reviews

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Both my flight where delayed Had 25min to make it to my transfer flight

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It’s always a great time flying with united airlines.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

It would have been nice if American tried to care.

Delayed initially because they couldn’t print the flight details. Poor instruction on delay. When I got on the plane the flight attendant argued with me about whether my carry on would fit (it did, although she didn’t acknowledge that). No greeting (other than arguing with me) getting on or off the plane.

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

They are always late and seats was also not having working charger

Broke my luggage and I can't get a resolution yet.

My flight to London from Philadelphia was cancelled due to weather.

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

Flight was late and boarding was confusing because gate changed and I didn’t get a notification

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.

Everything went smoothly, and we even arrived 40min earlier than scheduled, on an Orland-Madrid route.

The staff was very nice and helpful. Some of the best crew I have met.

Suddenly, I don't find my flight back on the app Help Ticket 0757345716866 Hoeflich Flight back Sunday ib5333 Ib2629 Ib4268

Was all good.l including a sofdrink. AA improved significantly. There was no entertainment.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Everything could have been better. What needed to be wrong with United went wrong

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

Very good, i got two seats for myself, and was comfortable with the blanket i got

I hated the FRA Airport. Confusing signage, including the path to Immigration and Security It seems that the airport grew haphazardly over the years. I have been through multiple WW Hubs with much better experiences.

Economy Priority seats are extremely uncomfortable. There is no way to escape the boxed in feeling, particularely because the distance between to rows are too short, the hard edge of the front row is keeping legs confined. There is no elevated place to put your feet. I am of average, European size.

Terrible. Both flights were significantly delayed, no luggage, made me check my small bag when many, many others had much larger carry-ons, not even a bottle of water . . . I will not fly Discover Airlines again.

I was deceived on the Kayak site expecting a ticket, but instead finding a "standby" reservation. When I tried to change the ticket, I paid almost twice the price of the original ticket. Then, the airline refused to give me the reserved seat I had chosen and paid for. I think I deserve a refund for this leg of my trip because I was doubly charged and did not receive what I had paid for. I put in a complaint with Lufthansa because the ticket was sold originally sold as a flight they listed. Someone here needs to take responsibility.

Excellent service; they helped me reschedule so I can fly in an earlier flight

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

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

Information on your arrival and departure airports