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Cheap flights from Philadelphia to Porto from $363

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 5/6. 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 - 12:05 pm
PHL
-
OPO
15h 35m2 stops
Multiple Airlines Logo
6:00 am - 5:05 pm
OPO
-
PHL
15h 05m1 stop
$483Multiple Airlines
Mon, Jan 12 - Tue, Mar 17
United Airlines Logo
12:55 pm - 9:30 am
PHL
-
OPO
15h 35m2 stops
United Airlines Logo
6:00 am - 7:04 pm
OPO
-
PHL
18h 04m2 stops
$486United Airlines
Wed, Feb 25 - Wed, Mar 4
Air Canada Logo
3:30 pm - 1:15 pm
PHL
-
OPO
16h 45m2 stops
Air Canada Logo
6:00 am - 10:46 pm
OPO
-
PHL
21h 46m2 stops
$489Air Canada
Wed, Feb 18 - Wed, Feb 25
Multiple Airlines Logo
3:30 pm - 12:05 pm
PHL
-
OPO
15h 35m2 stops
Multiple Airlines Logo
7:20 pm - 9:28 pm
OPO
-
PHL
31h 08m2 stops
$491Multiple Airlines
Mon, Jan 12 - Wed, Feb 25
Delta Logo
11:16 am - 10:30 am
PHL
-
OPO
19h 14m2 stops
Delta Logo
5:00 am - 11:59 pm
OPO
-
PHL
23h 59m2 stops
$492Delta
Tue, Mar 24 - Wed, Apr 1
Multiple Airlines Logo
12:29 pm - 10:30 am
PHL
-
OPO
17h 01m2 stops
Multiple Airlines Logo
9:55 am - 11:13 pm
OPO
-
PHL
18h 18m2 stops
$493Multiple Airlines
Tue, Feb 10 - Tue, Feb 24
Multiple Airlines Logo
7:55 pm - 11:45 am
PHL
-
OPO
10h 50m1 stop
Multiple Airlines Logo
8:20 am - 4:35 pm
OPO
-
PHL
12h 15m1 stop
$495Multiple Airlines
Mon, Jan 12 - Tue, Mar 17
Multiple Airlines Logo
6:35 pm - 4:45 pm
PHL
-
OPO
17h 10m1 stop
Multiple Airlines Logo
8:40 pm - 3:35 pm
OPO
-
PHL
23h 55m1 stop
$498Multiple Airlines
Wed, Feb 25 - Wed, Mar 4
Delta Logo
4:59 pm - 3:25 pm
PHL
-
OPO
17h 26m2 stops
Delta Logo
5:00 am - 11:59 pm
OPO
-
PHL
22h 59m2 stops
$499Delta
Wed, Mar 4 - Wed, Mar 11
United Airlines Logo
12:15 pm - 9:30 am
PHL
-
OPO
17h 15m2 stops
United Airlines Logo
12:00 pm - 4:00 pm
OPO
-
PHL
33h 00m1 stop
$501United Airlines
Tue, Mar 24 - Wed, Apr 1

Air Canada flights from Philadelphia to Porto

Our best Air Canada deals on Philadelphia to Porto flight tickets
Air Canada
Feb 18
PHL3:30 pmPhiladelphia
16h 45m
2 stops
OPO1:15 pmPorto
Feb 25
OPO6:00 amPorto
21h 46m
2 stops
PHL10:46 pmPhiladelphia
$489
Find similar
Air Canada
Dec 21
PHL3:30 pmPhiladelphia
18h 45m
2 stops
OPO3:15 pmPorto
Dec 23
OPO9:00 amPorto
18h 46m
3 stops
PHL10:46 pmPhiladelphia
$3,481
Find similar

Delta flights from Philadelphia to Porto

Our best Delta deals on Philadelphia to Porto flight tickets
Delta
Mar 24
PHL11:16 amPhiladelphia
19h 14m
2 stops
OPO10:30 amPorto
Apr 1
OPO5:00 amPorto
23h 59m
2 stops
PHL11:59 pmPhiladelphia
$492
Find similar
Delta
Mar 4
PHL4:59 pmPhiladelphia
17h 26m
2 stops
OPO3:25 pmPorto
Mar 11
OPO5:00 amPorto
22h 59m
2 stops
PHL11:59 pmPhiladelphia
$499
Find similar
Delta
Jan 30
PHL11:22 amPhiladelphia
18h 08m
2 stops
OPO10:30 amPorto
Feb 6
OPO5:00 amPorto
22h 50m
2 stops
PHL10:50 pmPhiladelphia
$543
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 December 18, 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

Mon 1/12

3:30 pm-12:05 pm

2 stops15h 35m

Porto

Tue 3/17

6:00 am-5:05 pm

1 stop15h 05m

$483

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/25

12:55 pm-9:30 am

2 stops15h 35m

Porto

Wed 3/4

6:00 am-7:04 pm

2 stops18h 04m

$486

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/18

3:30 pm-1:15 pm

2 stops16h 45m

Porto

Wed 2/25

6:00 am-10:46 pm

2 stops21h 46m

$489

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 1/12

3:30 pm-12:05 pm

2 stops15h 35m

Porto

Wed 2/25

7:20 pm-9:28 pm

2 stops31h 08m

$491

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 3/24

11:16 am-10:30 am

2 stops19h 14m

Porto

Wed 4/1

5:00 am-11:59 pm

2 stops23h 59m

$492

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 2/10

12:29 pm-10:30 am

2 stops17h 01m

Porto

Tue 2/24

9:55 am-11:13 pm

2 stops18h 18m

$493

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 1/12

7:55 pm-11:45 am

1 stop10h 50m

Porto

Tue 3/17

8:20 am-4:35 pm

1 stop12h 15m

$495

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/25

6:35 pm-4:45 pm

1 stop17h 10m

Porto

Wed 3/4

8:40 pm-3:35 pm

1 stop23h 55m

$498

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 3/4

4:59 pm-3:25 pm

2 stops17h 26m

Porto

Wed 3/11

5:00 am-11:59 pm

2 stops22h 59m

$499

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 3/24

12:15 pm-9:30 am

2 stops17h 15m

Porto

Wed 4/1

12:00 pm-4:00 pm

1 stop33h 00m

$501

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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 $657.

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 $816 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 14% 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

16h 05m

Direct flights

None
The fastest flight from Philadelphia to Porto takes 16h 05m
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. 16h 05m 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
9,091 reviews
Search United Airlines flights
American AirlinesPriceFrom $567Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights
LufthansaPriceFrom $576Free CancellationRating
6.8
7,634 reviews
Search Lufthansa flights
IberiaPriceFrom $593Free CancellationRating
7.0
3,050 reviews
Search Iberia 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
Aveiro
Matosinhos
Guimarães
Esposende
Lamego
Chaves
Viseu
Espinho
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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