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Cheap flights from Philadelphia to Porto from $348

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 4/22. 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.
Lufthansa Logo
5:40 pm - 11:40 amPHL-OPO
13h 00m1 stop
Lufthansa Logo
6:00 am - 4:05 pmOPO-PHL
15h 05m1 stop
$465Lufthansa
Find Deal
Tue, Dec 2 - Tue, Dec 9
Multiple Airlines Logo
6:00 am - 9:30 amPHL-OPO
22h 30m2 stops
Multiple Airlines Logo
6:00 am - 4:05 pmOPO-PHL
15h 05m1 stop
$469Multiple Airlines
Find Deal
Mon, Nov 24 - Tue, Dec 9
KLM Logo
5:33 pm - 3:25 pmPHL-OPO
16h 52m2 stops
KLM Logo
6:05 am - 4:56 pmOPO-PHL
15h 51m2 stops
$478KLM
Find Deal
Mon, Nov 24 - Tue, Dec 9
United Airlines Logo
3:30 pm - 11:40 amPHL-OPO
15h 10m2 stops
United Airlines Logo
6:00 am - 4:05 pmOPO-PHL
15h 05m1 stop
$488United Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
Delta Logo
10:32 am - 10:30 amPHL-OPO
18h 58m2 stops
Delta Logo
6:05 am - 11:10 pmOPO-PHL
22h 05m2 stops
$491Delta
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Tue, Dec 2 - Tue, Dec 9
SWISS Logo
4:56 pm - 6:35 pmPHL-OPO
21h 39m2 stops
SWISS Logo
7:20 pm - 9:23 pmOPO-PHL
31h 03m2 stops
$496SWISS
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Mon, Mar 9 - Mon, Mar 30
United Airlines Logo
12:40 pm - 9:30 amPHL-OPO
15h 50m2 stops
United Airlines Logo
12:30 pm - 4:05 pmOPO-PHL
32h 35m1 stop
$497United Airlines
Find Deal
Wed, Nov 26 - Mon, Dec 1
Multiple Airlines Logo
7:50 am - 12:50 pmPHL-OPO
24h 00m2 stops
Multiple Airlines Logo
4:15 pm - 2:50 pmOPO-PHL
27h 35m2 stops
$501Multiple Airlines
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Tue, Dec 2 - Mon, Dec 8
Multiple Airlines Logo
5:40 pm - 2:45 pmPHL-OPO
16h 05m1 stop
Multiple Airlines Logo
6:00 am - 2:50 pmOPO-PHL
37h 50m2 stops
$504Multiple Airlines
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Tue, Dec 2 - Mon, Dec 8
American Airlines Logo
7:55 pm - 11:45 amPHL-OPO
10h 50m1 stop
American Airlines Logo
12:25 pm - 3:30 pmOPO-PHL
32h 05m1 stop
$505American Airlines
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Mon, Nov 24 - Tue, Dec 9

Lufthansa flights from Philadelphia to Porto

Our best Lufthansa deals on Philadelphia to Porto flight tickets
Lufthansa
Dec 2
PHL5:40 pmPhiladelphia
13h 00m
1 stop
OPO11:40 amPorto
Dec 9
OPO6:00 amPorto
15h 05m
1 stop
PHL4:05 pmPhiladelphia
$465
Find similar
Lufthansa
Dec 2
PHL5:40 pmPhiladelphia
16h 05m
1 stop
OPO2:45 pmPorto
Dec 8
OPO4:15 pmPorto
28h 50m
1 stop
PHL4:05 pmPhiladelphia
$506
Find similar
Lufthansa
Mar 9
PHL4:35 pmPhiladelphia
16h 15m
2 stops
OPO12:50 pmPorto
Mar 30
OPO4:35 pmPorto
28h 25m
1 stop
PHL4:00 pmPhiladelphia
$523
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United Airlines flights from Philadelphia to Porto

Our best United Airlines deals on Philadelphia to Porto flight tickets
United Airlines
Dec 2
PHL3:30 pmPhiladelphia
15h 10m
2 stops
OPO11:40 amPorto
Dec 9
OPO6:00 amPorto
15h 05m
1 stop
PHL4:05 pmPhiladelphia
$488
Find similar
United Airlines
Nov 26
PHL12:40 pmPhiladelphia
15h 50m
2 stops
OPO9:30 amPorto
Dec 1
OPO12:30 pmPorto
32h 35m
1 stop
PHL4:05 pmPhiladelphia
$497
Find similar
United Airlines
Dec 2
PHL5:40 pmPhiladelphia
13h 00m
1 stop
OPO11:40 amPorto
Dec 8
OPO12:30 pmPorto
32h 35m
1 stop
PHL4:05 pmPhiladelphia
$507
Find similar

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 November 13, 2025.
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

Tue 12/2

5:40 pm-11:40 am

1 stop13h 00m

Porto

Tue 12/9

6:00 am-4:05 pm

1 stop15h 05m

$465

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 11/24

6:00 am-9:30 am

2 stops22h 30m

Porto

Tue 12/9

6:00 am-4:05 pm

1 stop15h 05m

$469

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 11/24

5:33 pm-3:25 pm

2 stops16h 52m

Porto

Tue 12/9

6:05 am-4:56 pm

2 stops15h 51m

$478

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 12/2

3:30 pm-11:40 am

2 stops15h 10m

Porto

Tue 12/9

6:00 am-4:05 pm

1 stop15h 05m

$488

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 12/2

10:32 am-10:30 am

2 stops18h 58m

Porto

Tue 12/9

6:05 am-11:10 pm

2 stops22h 05m

$491

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/9

4:56 pm-6:35 pm

2 stops21h 39m

Porto

Mon 3/30

7:20 pm-9:23 pm

2 stops31h 03m

$496

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 11/26

12:40 pm-9:30 am

2 stops15h 50m

Porto

Mon 12/1

12:30 pm-4:05 pm

1 stop32h 35m

$497

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 12/2

7:50 am-12:50 pm

2 stops24h 00m

Porto

Mon 12/8

4:15 pm-2:50 pm

2 stops27h 35m

$501

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 12/2

5:40 pm-2:45 pm

1 stop16h 05m

Porto

Mon 12/8

6:00 am-2:50 pm

2 stops37h 50m

$504

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 11/24

7:55 pm-11:45 am

1 stop10h 50m

Porto

Tue 12/9

12:25 pm-3:30 pm

1 stop32h 05m

$505

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 $666. If you aren’t able to travel during the month of November, then book flights to Porto from Philadelphia during January instead. Flights to Porto in January, while not as cheap as those in November, still average around $678.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Sunday when prices can be found for as low as $814. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $1,097. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the evening is the cheapest time of day to fly from Philadelphia to Porto when you can find flight prices for as low as $829. Flying to Porto in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $951 on average. Flights to Porto from Philadelphia in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Can stopping save me money on Philadelphia to Porto flights?

You could potentially save up to 44% 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

Direct flights

None
There are no direct flights from Philadelphia to Porto. There are no popular flight routes from Philadelphia to Porto.
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  • How far is Philadelphia to Porto by plane?

    A flight from Philadelphia to Porto will travel around 3401.6 mi. 10h 50m 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 $563Free CancellationRating
7.4
9,017 reviews
Search United Airlines flights
American AirlinesPriceFrom $567Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights
IberiaPriceFrom $593Free CancellationRating
7.0
3,012 reviews
Search Iberia flights
LufthansaPriceFrom $636Free CancellationRating
6.8
7,572 reviews
Search Lufthansa flights
Air CanadaPriceFrom $673Free CancellationRating
7.1
10,448 reviews
Search Air Canada 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
Aveiro
Matosinhos
Braga
Lamego
Guimarães
Esposende
Chaves
Espinho
Viseu
Ponte de Lima
Arcos de Valdevez
Pinhao
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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