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Cheap flights from Philadelphia to Porto from $265

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 10/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Multiple Airlines Logo
3:30 pm - 1:15 pmPHL-OPO
16h 45m2 stops
Multiple Airlines Logo
12:10 pm - 2:47 pmOPO-PHL
55h 37m2 stops
$463Multiple Airlines
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Wed, Nov 26 - Wed, Dec 3
SWISS Logo
12:55 pm - 6:30 pmPHL-OPO
24h 35m2 stops
SWISS Logo
7:20 pm - 12:26 amOPO-PHL
33h 06m2 stops
$476SWISS
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Tue, Mar 3 - Mon, Mar 9
United Airlines Logo
10:05 am - 9:30 amPHL-OPO
18h 25m2 stops
United Airlines Logo
6:00 am - 4:05 pmOPO-PHL
15h 05m1 stop
$478United Airlines
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Wed, Nov 12 - Thu, Nov 20
United Airlines Logo
10:10 am - 9:30 amPHL-OPO
18h 20m2 stops
United Airlines Logo
6:00 am - 5:05 pmOPO-PHL
15h 05m1 stop
$479United Airlines
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Tue, Mar 3 - Thu, Mar 12
Air Canada Logo
3:30 pm - 1:15 pmPHL-OPO
16h 45m2 stops
Air Canada Logo
6:00 am - 10:46 pmOPO-PHL
21h 46m2 stops
$482Air Canada
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Wed, Nov 26 - Wed, Dec 3
Air Canada Logo
3:30 pm - 12:50 pmPHL-OPO
16h 20m2 stops
Air Canada Logo
6:00 am - 10:56 pmOPO-PHL
21h 56m2 stops
$483Air Canada
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Mon, Feb 16 - Wed, Feb 25
Lufthansa Logo
5:40 pm - 2:45 pmPHL-OPO
16h 05m1 stop
Lufthansa Logo
6:00 am - 4:05 pmOPO-PHL
15h 05m1 stop
$488Lufthansa
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Tue, Nov 25 - Tue, Dec 2
Lufthansa Logo
5:40 pm - 11:40 amPHL-OPO
13h 00m1 stop
Lufthansa Logo
6:00 am - 4:05 pmOPO-PHL
15h 05m1 stop
$492Lufthansa
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Thu, Nov 27 - Thu, Dec 4
Delta Logo
1:30 pm - 10:30 amPHL-OPO
16h 00m2 stops
Delta Logo
11:25 am - 5:11 pmOPO-PHL
34h 46m2 stops
$510Delta
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Tue, Feb 17 - Mon, Feb 23
Delta Logo
5:20 pm - 10:25 pmPHL-OPO
24h 05m2 stops
Delta Logo
11:25 am - 6:19 pmOPO-PHL
35h 54m2 stops
$516Delta
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Mon, Feb 16 - Mon, Feb 23

United Airlines flights from Philadelphia to Porto

Our best United Airlines deals on Philadelphia to Porto flight tickets
United Airlines
Nov 12
PHL10:05 amPhiladelphia
18h 25m
2 stops
OPO9:30 amPorto
Nov 20
OPO6:00 amPorto
15h 05m
1 stop
PHL4:05 pmPhiladelphia
$478
Find similar
United Airlines
Mar 3
PHL10:10 amPhiladelphia
18h 20m
2 stops
OPO9:30 amPorto
Mar 12
OPO6:00 amPorto
15h 05m
1 stop
PHL5:05 pmPhiladelphia
$479
Find similar
United Airlines
Feb 18
PHL10:10 amPhiladelphia
24h 15m
3 stops
OPO3:25 pmPorto
Feb 25
OPO6:00 amPorto
38h 49m
2 stops
PHL3:49 pmPhiladelphia
$500
Find similar

Air Canada flights from Philadelphia to Porto

Our best Air Canada deals on Philadelphia to Porto flight tickets
Air Canada
Nov 26
PHL3:30 pmPhiladelphia
16h 45m
2 stops
OPO1:15 pmPorto
Dec 3
OPO6:00 amPorto
21h 46m
2 stops
PHL10:46 pmPhiladelphia
$482
Find similar
Air Canada
Feb 16
PHL3:30 pmPhiladelphia
16h 20m
2 stops
OPO12:50 pmPorto
Feb 25
OPO6:00 amPorto
21h 56m
2 stops
PHL10:56 pmPhiladelphia
$483
Find similar
Air Canada
Nov 23
PHL3:30 pmPhiladelphia
15h 35m
2 stops
OPO12:05 pmPorto
Dec 5
OPO6:00 amPorto
38h 49m
2 stops
PHL3:49 pmPhiladelphia
$484
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 October 14, 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

Wed 11/26

3:30 pm-1:15 pm

2 stops16h 45m

Porto

Wed 12/3

12:10 pm-2:47 pm

2 stops55h 37m

$463

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 3/3

12:55 pm-6:30 pm

2 stops24h 35m

Porto

Mon 3/9

7:20 pm-12:26 am

2 stops33h 06m

$476

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 11/12

10:05 am-9:30 am

2 stops18h 25m

Porto

Thu 11/20

6:00 am-4:05 pm

1 stop15h 05m

$478

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 3/3

10:10 am-9:30 am

2 stops18h 20m

Porto

Thu 3/12

6:00 am-5:05 pm

1 stop15h 05m

$479

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 11/26

3:30 pm-1:15 pm

2 stops16h 45m

Porto

Wed 12/3

6:00 am-10:46 pm

2 stops21h 46m

$482

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 2/16

3:30 pm-12:50 pm

2 stops16h 20m

Porto

Wed 2/25

6:00 am-10:56 pm

2 stops21h 56m

$483

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 11/25

5:40 pm-2:45 pm

1 stop16h 05m

Porto

Tue 12/2

6:00 am-4:05 pm

1 stop15h 05m

$488

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 11/27

5:40 pm-11:40 am

1 stop13h 00m

Porto

Thu 12/4

6:00 am-4:05 pm

1 stop15h 05m

$492

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 2/17

1:30 pm-10:30 am

2 stops16h 00m

Porto

Mon 2/23

11:25 am-5:11 pm

2 stops34h 46m

$510

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 2/16

5:20 pm-10:25 pm

2 stops24h 05m

Porto

Mon 2/23

11:25 am-6:19 pm

2 stops35h 54m

$516

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 $667. 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.

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 $808 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 $653 on momondo.

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. 13h 00m 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
American AirlinesPriceFrom $567Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
IberiaPriceFrom $593Free CancellationRating
7.0
2,990 reviews
Search Iberia flights
United AirlinesPriceFrom $601Free CancellationRating
7.4
8,976 reviews
Search United Airlines flights
LufthansaPriceFrom $625Free CancellationRating
6.8
7,489 reviews
Search Lufthansa flights
Air CanadaPriceFrom $673Free CancellationRating
7.1
10,297 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
Braga
Matosinhos
Caminha
Esposende
Lamego
Guimarães
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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