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Cheap flights from Philadelphia to Porto from $292

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 3/17. 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.
United Airlines Logo
12:15 pm - 9:30 am
PHL
-
OPO
17h 15m
2 stops
United Airlines Logo
6:00 am - 2:17 pm
OPO
-
PHL
36h 17m
2 stops
$492United Airlines
Mon, Mar 9 - Tue, Mar 24
Air Canada Logo
3:30 pm - 12:05 pm
PHL
-
OPO
15h 35m
2 stops
Air Canada Logo
6:00 am - 3:26 pm
OPO
-
PHL
38h 26m
2 stops
$493Air Canada
Wed, Feb 18 - Wed, Feb 25
Multiple Airlines Logo
12:16 pm - 10:30 am
PHL
-
OPO
17h 14m
2 stops
Multiple Airlines Logo
11:15 am - 12:24 am
OPO
-
PHL
18h 09m
2 stops
$494Multiple Airlines
Tue, Feb 24 - Tue, Mar 3
SWISS Logo
11:36 am - 7:55 am
PHL
-
OPO
39h 19m
2 stops
SWISS Logo
8:40 am - 5:32 pm
OPO
-
PHL
37h 52m
2 stops
$498SWISS
Wed, Apr 22 - Fri, May 8
KLM Logo
6:25 pm - 3:25 pm
PHL
-
OPO
17h 00m
2 stops
KLM Logo
9:55 am - 11:00 pm
OPO
-
PHL
17h 05m
2 stops
$500KLM
Mon, Mar 9 - Tue, Mar 24
Multiple Airlines Logo
3:30 pm - 12:50 pm
PHL
-
OPO
17h 20m
2 stops
Multiple Airlines Logo
4:35 pm - 4:05 pm
OPO
-
PHL
28h 30m
1 stop
$504Multiple Airlines
Mon, Mar 9 - Mon, Mar 30
American Airlines Logo
7:45 pm - 11:45 am
PHL
-
OPO
11h 00m
1 stop
American Airlines Logo
8:20 am - 8:35 pm
OPO
-
PHL
17h 15m
2 stops
$506American Airlines
Wed, Feb 18 - Wed, Feb 25
Multiple Airlines Logo
7:45 pm - 11:45 am
PHL
-
OPO
11h 00m
1 stop
Multiple Airlines Logo
8:40 pm - 3:25 pm
OPO
-
PHL
23h 45m
1 stop
$507Multiple Airlines
Wed, Feb 18 - Wed, Feb 25
American Airlines Logo
3:57 pm - 11:45 am
PHL
-
OPO
14h 48m
2 stops
American Airlines Logo
8:40 pm - 3:25 pm
OPO
-
PHL
23h 45m
1 stop
$512American Airlines
Wed, Feb 18 - Wed, Feb 25
SWISS Logo
11:36 am - 7:55 am
PHL
-
OPO
39h 19m
2 stops
SWISS Logo
8:40 am - 5:32 pm
OPO
-
PHL
37h 52m
2 stops
$519SWISS
Tue, Apr 14 - Fri, Apr 24

United Airlines flights from Philadelphia to Porto

Our best United Airlines deals on Philadelphia to Porto flight tickets
United Airlines
Mar 9
PHL12:15 pmPhiladelphia
17h 15m
2 stops
OPO9:30 amPorto
Mar 24
OPO6:00 amPorto
36h 17m
2 stops
PHL2:17 pmPhiladelphia
$492
United Airlines
Mar 20
PHL7:45 pmPhiladelphia
15h 00m
2 stops
OPO2:45 pmPorto
Mar 26
OPO6:00 amPorto
15h 05m
1 stop
PHL5:05 pmPhiladelphia
$547
United Airlines
Feb 28
PHL8:02 pmPhiladelphia
32h 28m
2 stops
OPO9:30 amPorto
Mar 7
OPO12:30 pmPorto
32h 35m
1 stop
PHL4:05 pmPhiladelphia
$558

SWISS flights from Philadelphia to Porto

Our best SWISS deals on Philadelphia to Porto flight tickets
SWISS
Apr 22
PHL11:36 amPhiladelphia
39h 19m
2 stops
OPO7:55 amPorto
May 8
OPO8:40 amPorto
37h 52m
2 stops
PHL5:32 pmPhiladelphia
$498
SWISS
Apr 14
PHL11:36 amPhiladelphia
39h 19m
2 stops
OPO7:55 amPorto
Apr 24
OPO8:40 amPorto
37h 52m
2 stops
PHL5:32 pmPhiladelphia
$519
SWISS
Feb 24
PHL12:55 pmPhiladelphia
41h 20m
3 stops
OPO11:15 amPorto
Mar 3
OPO12:05 pmPorto
38h 04m
2 stops
PHL9:09 pmPhiladelphia
$706

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 26, 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

Mon 3/9

12:15 pm-9:30 am

2 stops17h 15m

Porto

Tue 3/24

6:00 am-2:17 pm

2 stops36h 17m

$492

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/18

3:30 pm-12:05 pm

2 stops15h 35m

Porto

Wed 2/25

6:00 am-3:26 pm

2 stops38h 26m

$493

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 2/24

12:16 pm-10:30 am

2 stops17h 14m

Porto

Tue 3/3

11:15 am-12:24 am

2 stops18h 09m

$494

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 4/22

11:36 am-7:55 am

2 stops39h 19m

Porto

Fri 5/8

8:40 am-5:32 pm

2 stops37h 52m

$498

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/9

6:25 pm-3:25 pm

2 stops17h 00m

Porto

Tue 3/24

9:55 am-11:00 pm

2 stops17h 05m

$500

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/9

3:30 pm-12:50 pm

2 stops17h 20m

Porto

Mon 3/30

4:35 pm-4:05 pm

1 stop28h 30m

$504

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/18

7:45 pm-11:45 am

1 stop11h 00m

Porto

Wed 2/25

8:20 am-8:35 pm

2 stops17h 15m

$506

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/18

7:45 pm-11:45 am

1 stop11h 00m

Porto

Wed 2/25

8:40 pm-3:25 pm

1 stop23h 45m

$507

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/18

3:57 pm-11:45 am

2 stops14h 48m

Porto

Wed 2/25

8:40 pm-3:25 pm

1 stop23h 45m

$512

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 4/14

11:36 am-7:55 am

2 stops39h 19m

Porto

Fri 4/24

8:40 am-5:32 pm

2 stops37h 52m

$519

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 17% 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

12h 35m

Direct flights

None
The fastest flight from Philadelphia to Porto takes 12h 35m
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. 12h 35m 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
9,199 reviews
Search United Airlines flights
IberiaPriceFrom $546Free CancellationRating
7.0
3,098 reviews
Search Iberia flights
American AirlinesPriceFrom $567Free CancellationRating
7.2
11,189 reviews
Search American Airlines flights
LufthansaPriceFrom $576Free CancellationRating
6.8
7,747 reviews
Search Lufthansa flights
British AirwaysPriceFrom $616Free CancellationRating
6.7
7,700 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
Aveiro
Matosinhos
Esposende
Lamego
Guimarães
Espinho
Chaves
Pinhao
Arcos de Valdevez
Ponte de Lima
Viseu
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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