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Cheap flights from Philadelphia to Porto from $255

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Porto departing on 5/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Philadelphia to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
7:45 pm - 8:00 pm
PHL
-
OPO
19h 15m1 stop
Iberia Logo
9:55 pm - 3:05 pm
OPO
-
PHL
22h 10m1 stop
$444Iberia
Wed, Feb 18 - Wed, Feb 25
Iberia Logo
7:55 pm - 11:45 am
PHL
-
OPO
10h 50m1 stop
Iberia Logo
9:55 pm - 3:35 pm
OPO
-
PHL
22h 40m1 stop
$445Iberia
Sun, Jan 18 - Tue, Feb 3
Iberia Logo
7:45 pm - 8:00 pm
PHL
-
OPO
20h 15m1 stop
Iberia Logo
10:00 pm - 3:25 pm
OPO
-
PHL
22h 25m1 stop
$453Iberia
Mon, Mar 9 - Mon, Mar 30
Air Canada Logo
3:30 pm - 12:05 pm
PHL
-
OPO
15h 35m2 stops
Air Canada Logo
6:00 am - 10:46 pm
OPO
-
PHL
21h 46m2 stops
$456Air Canada
Sun, Jan 18 - Tue, Feb 3
Multiple Airlines Logo
7:55 pm - 8:00 pm
PHL
-
OPO
19h 05m1 stop
Multiple Airlines Logo
8:20 am - 8:25 pm
OPO
-
PHL
17h 05m2 stops
$457Multiple Airlines
Sun, Jan 18 - Tue, Feb 3
Iberia Logo
7:45 pm - 8:00 pm
PHL
-
OPO
20h 15m1 stop
Iberia Logo
8:40 pm - 3:25 pm
OPO
-
PHL
23h 45m2 stops
$459Iberia
Mon, Mar 9 - Mon, Mar 30
Multiple Airlines Logo
10:35 am - 7:40 am
PHL
-
OPO
16h 05m2 stops
Multiple Airlines Logo
8:20 am - 7:48 pm
OPO
-
PHL
16h 28m2 stops
$461Multiple Airlines
Wed, Feb 18 - Wed, Feb 25
Multiple Airlines Logo
10:25 am - 7:40 am
PHL
-
OPO
16h 15m2 stops
Multiple Airlines Logo
8:40 pm - 3:25 pm
OPO
-
PHL
23h 45m1 stop
$462Multiple Airlines
Wed, Feb 18 - Wed, Feb 25
United Airlines Logo
12:15 pm - 9:30 am
PHL
-
OPO
17h 15m2 stops
United Airlines Logo
6:00 am - 10:43 pm
OPO
-
PHL
21h 43m2 stops
$465United Airlines
Tue, Mar 24 - Tue, Mar 31
British Airways Logo
7:20 pm - 5:35 pm
PHL
-
OPO
18h 15m2 stops
British Airways Logo
9:10 pm - 3:25 pm
OPO
-
PHL
23h 15m2 stops
$475British Airways
Mon, Mar 9 - Mon, Mar 30

Delta flights from Philadelphia to Porto

Our best Delta deals on Philadelphia to Porto flight tickets
Delta
Mar 16
PHL11:16 amPhiladelphia
19h 14m
2 stops
OPO10:30 amPorto
Mar 24
OPO11:25 amPorto
33h 08m
2 stops
PHL4:33 pmPhiladelphia
$479
Delta
Mar 18
PHL6:05 amPhiladelphia
24h 25m
2 stops
OPO10:30 amPorto
Mar 24
OPO11:25 amPorto
33h 08m
2 stops
PHL4:33 pmPhiladelphia
$480
Delta
Mar 9
PHL9:41 amPhiladelphia
20h 49m
2 stops
OPO10:30 amPorto
Mar 30
OPO6:30 amPorto
19h 53m
2 stops
PHL9:23 pmPhiladelphia
$530

United Airlines flights from Philadelphia to Porto

Our best United Airlines deals on Philadelphia to Porto flight tickets
United Airlines
Mar 24
PHL12:15 pmPhiladelphia
17h 15m
2 stops
OPO9:30 amPorto
Mar 31
OPO6:00 amPorto
21h 43m
2 stops
PHL10:43 pmPhiladelphia
$465
United Airlines
Mar 24
PHL12:15 pmPhiladelphia
17h 15m
2 stops
OPO9:30 amPorto
Mar 31
OPO6:00 amPorto
15h 00m
1 stop
PHL4:00 pmPhiladelphia
$477
United Airlines
Mar 16
PHL9:55 amPhiladelphia
19h 35m
2 stops
OPO9:30 amPorto
Mar 26
OPO6:00 amPorto
15h 05m
1 stop
PHL5:05 pmPhiladelphia
$487

momondo Fare Finder

 
Customize your flight search to find flights from Philadelphia to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 8, 2026.
Use the filters below to find and compare flights from Philadelphia to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/18

7:45 pm-8:00 pm

1 stop19h 15m

Porto

Wed 2/25

9:55 pm-3:05 pm

1 stop22h 10m

$444

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 1/18

7:55 pm-11:45 am

1 stop10h 50m

Porto

Tue 2/3

9:55 pm-3:35 pm

1 stop22h 40m

$445

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/9

7:45 pm-8:00 pm

1 stop20h 15m

Porto

Mon 3/30

10:00 pm-3:25 pm

1 stop22h 25m

$453

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 1/18

3:30 pm-12:05 pm

2 stops15h 35m

Porto

Tue 2/3

6:00 am-10:46 pm

2 stops21h 46m

$456

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 1/18

7:55 pm-8:00 pm

1 stop19h 05m

Porto

Tue 2/3

8:20 am-8:25 pm

2 stops17h 05m

$457

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/9

7:45 pm-8:00 pm

1 stop20h 15m

Porto

Mon 3/30

8:40 pm-3:25 pm

2 stops23h 45m

$459

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/18

10:35 am-7:40 am

2 stops16h 05m

Porto

Wed 2/25

8:20 am-7:48 pm

2 stops16h 28m

$461

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/18

10:25 am-7:40 am

2 stops16h 15m

Porto

Wed 2/25

8:40 pm-3:25 pm

1 stop23h 45m

$462

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 3/24

12:15 pm-9:30 am

2 stops17h 15m

Porto

Tue 3/31

6:00 am-10:43 pm

2 stops21h 43m

$465

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/9

7:20 pm-5:35 pm

2 stops18h 15m

Porto

Mon 3/30

9:10 pm-3:25 pm

2 stops23h 15m

$475

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Porto from

How to get the cheapest flight ticket from Philadelphia to Porto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Porto?

The month of November is, on average, the cheapest month to fly to Porto from Philadelphia, with most prices found around $616. If you aren’t able to travel during the month of November, then book flights to Porto from Philadelphia during March instead. Flights to Porto in March, while not as cheap as those in November, still average around $636.

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $784 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Philadelphia for as low as $640 on momondo.

Can stopping save me money on Philadelphia to Porto flights?

You could potentially save up to 35% on your flight if you consider stops on a Philadelphia to Porto flight.

When to book flights from Philadelphia to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Philadelphia to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Philadelphia to Porto (PHL to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Philadelphia to Porto

Fastest flight time

14h 36m

Direct flights

None
The fastest flight from Philadelphia to Porto takes 14h 36m
There are no direct flights from Philadelphia to Porto. There are no popular flight routes from Philadelphia to Porto.
Search flight deals

  • How far is Philadelphia to Porto by plane?

    A flight from Philadelphia to Porto will travel around 3401.6 mi. 14h 36m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Philadelphia Airport to Porto Airport?

    Prices for flights from Philadelphia Airport to Porto Airport refresh daily.

  • How many operators does momondo search for flights from Philadelphia Airport to Porto Airport?

  • How old do you have to be to fly from Philadelphia Airport to Porto Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Philadelphia Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The required travel and health documents for your Porto Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Porto Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Philadelphia to Porto?

Best airlines flying from Philadelphia to Porto

Compare and see reviews for airlines that fly from Philadelphia to Porto with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $489Free CancellationRating
7.4
9,141 reviews
Search United Airlines flights
American AirlinesPriceFrom $567Free CancellationRating
7.2
11,095 reviews
Search American Airlines flights
LufthansaPriceFrom $576Free CancellationRating
6.8
7,697 reviews
Search Lufthansa flights
IberiaPriceFrom $593Free CancellationRating
7.0
3,079 reviews
Search Iberia flights
British AirwaysPriceFrom $616Free CancellationRating
6.7
7,659 reviews
Search British Airways flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Braga
Matosinhos
Aveiro
Esposende
Lamego
Guimarães
Chaves
Espinho
Viseu
Pinhao
Arcos de Valdevez
Ponte de Lima
Curia
Penafiel
Mesao Frio
Mira
Baiao

Why use momondo?

Why should I use momondo to find a flight deal from Philadelphia to Porto?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Philadelphia to Porto. momondo saves you time and could save you money on your trip.

Can I find flights from Philadelphia to Porto with flexible booking policies on momondo?

All flight searches from Philadelphia to Porto on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Philadelphia to Porto?

Once you have performed a search for Philadelphia to Porto flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Philadelphia to Porto right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Philadelphia to Porto flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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