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Cheap flights from Philadelphia to Porto from $331

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 3/10. 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.
Multiple Airlines Logo
3:30 pm - 1:15 pm
PHL
-
OPO
17h 45m
2 stops
Multiple Airlines Logo
12:30 pm - 5:05 pm
OPO
-
PHL
32h 35m
1 stop
$486Multiple Airlines
Wed, Mar 11 - Mon, Mar 16
Multiple Airlines Logo
3:30 pm - 1:15 pm
PHL
-
OPO
17h 45m
2 stops
Multiple Airlines Logo
4:15 pm - 3:49 pm
OPO
-
PHL
51h 34m
2 stops
$491Multiple Airlines
Wed, Mar 11 - Mon, Mar 16
Multiple Airlines Logo
12:16 pm - 10:30 am
PHL
-
OPO
17h 14m
2 stops
Multiple Airlines Logo
5:00 am - 7:25 pm
OPO
-
PHL
19h 25m
2 stops
$495Multiple Airlines
Wed, Feb 18 - Wed, Feb 25
United Airlines Logo
1:27 pm - 3:40 pm
PHL
-
OPO
21h 13m
2 stops
United Airlines Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$499United Airlines
Wed, Apr 22 - Fri, May 8
Iberia Logo
8:15 pm - 8:00 pm
PHL
-
OPO
18h 45m
1 stop
Iberia Logo
8:20 am - 5:35 pm
OPO
-
PHL
14h 15m
1 stop
$500Iberia
Tue, Apr 14 - Fri, Apr 24
United Airlines Logo
7:45 pm - 3:40 pm
PHL
-
OPO
38h 55m
2 stops
United Airlines Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$505United Airlines
Tue, Apr 14 - Fri, Apr 24
Multiple Airlines Logo
3:30 pm - 12:05 pm
PHL
-
OPO
16h 35m
2 stops
Multiple Airlines Logo
4:35 pm - 4:05 pm
OPO
-
PHL
28h 30m
1 stop
$507Multiple Airlines
Mon, Mar 9 - Mon, Mar 30
Iberia Logo
7:45 pm - 8:00 pm
PHL
-
OPO
19h 15m
1 stop
Iberia Logo
8:40 pm - 3:25 pm
OPO
-
PHL
23h 45m
1 stop
$508Iberia
Wed, Feb 18 - Wed, Feb 25
Iberia Logo
7:45 pm - 11:45 am
PHL
-
OPO
11h 00m
1 stop
Iberia Logo
8:40 pm - 3:25 pm
OPO
-
PHL
23h 45m
1 stop
$509Iberia
Wed, Feb 18 - Wed, Feb 25
American Airlines Logo
1:46 pm - 11:45 am
PHL
-
OPO
16h 59m
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

United Airlines flights from Philadelphia to Porto

Our best United Airlines deals on Philadelphia to Porto flight tickets
United Airlines
Apr 22
PHL1:27 pmPhiladelphia
21h 13m
2 stops
OPO3:40 pmPorto
May 8
OPO6:00 amPorto
15h 05m
1 stop
PHL4:05 pmPhiladelphia
$499
United Airlines
Apr 14
PHL7:45 pmPhiladelphia
38h 55m
2 stops
OPO3:40 pmPorto
Apr 24
OPO6:00 amPorto
15h 05m
1 stop
PHL4:05 pmPhiladelphia
$505
United Airlines
Mar 1
PHL6:27 amPhiladelphia
22h 03m
2 stops
OPO9:30 amPorto
Mar 8
OPO6:00 amPorto
15h 05m
1 stop
PHL4:05 pmPhiladelphia
$538

Delta flights from Philadelphia to Porto

Our best Delta deals on Philadelphia to Porto flight tickets
Delta
May 4
PHL9:25 amPhiladelphia
25h 00m
2 stops
OPO3:25 pmPorto
May 8
OPO5:00 amPorto
23h 07m
2 stops
PHL11:07 pmPhiladelphia
$533
Delta
May 4
PHL9:25 amPhiladelphia
25h 00m
2 stops
OPO3:25 pmPorto
May 11
OPO4:20 pmPorto
32h 05m
2 stops
PHL7:25 pmPhiladelphia
$544
Delta
May 3
PHL6:00 amPhiladelphia
28h 25m
2 stops
OPO3:25 pmPorto
May 12
OPO5:00 amPorto
22h 14m
2 stops
PHL10:14 pmPhiladelphia
$574

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 February 3, 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 3/11

3:30 pm-1:15 pm

2 stops17h 45m

Porto

Mon 3/16

12:30 pm-5:05 pm

1 stop32h 35m

$486

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 3/11

3:30 pm-1:15 pm

2 stops17h 45m

Porto

Mon 3/16

4:15 pm-3:49 pm

2 stops51h 34m

$491

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/18

12:16 pm-10:30 am

2 stops17h 14m

Porto

Wed 2/25

5:00 am-7:25 pm

2 stops19h 25m

$495

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 4/22

1:27 pm-3:40 pm

2 stops21h 13m

Porto

Fri 5/8

6:00 am-4:05 pm

1 stop15h 05m

$499

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 4/14

8:15 pm-8:00 pm

1 stop18h 45m

Porto

Fri 4/24

8:20 am-5:35 pm

1 stop14h 15m

$500

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 4/14

7:45 pm-3:40 pm

2 stops38h 55m

Porto

Fri 4/24

6:00 am-4:05 pm

1 stop15h 05m

$505

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 3/9

3:30 pm-12:05 pm

2 stops16h 35m

Porto

Mon 3/30

4:35 pm-4:05 pm

1 stop28h 30m

$507

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/18

7:45 pm-8:00 pm

1 stop19h 15m

Porto

Wed 2/25

8:40 pm-3:25 pm

1 stop23h 45m

$508

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

$509

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Wed 2/18

1:46 pm-11:45 am

2 stops16h 59m

Porto

Wed 2/25

8:40 pm-3:25 pm

1 stop23h 45m

$512

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 $783 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

10h 25m

Direct flights

None
The fastest flight from Philadelphia to Porto takes 10h 25m
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. 10h 25m 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
9,236 reviews
Search United Airlines flights
IberiaPriceFrom $546Free CancellationRating
7.0
3,103 reviews
Search Iberia flights
American AirlinesPriceFrom $567Free CancellationRating
7.2
11,218 reviews
Search American Airlines flights
LufthansaPriceFrom $576Free CancellationRating
6.8
7,759 reviews
Search Lufthansa flights
British AirwaysPriceFrom $616Free CancellationRating
6.7
7,712 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
Viseu
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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