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Cheap flights from Philadelphia to Porto from $357

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 4/26. 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
1 adult, Economy, 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
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
$671United Airlines
Tue, Apr 14 - Fri, Apr 24
Lufthansa Logo
5:40 pm - 11:25 pm
PHL
-
OPO
24h 45m
2 stops
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$684Lufthansa
Tue, Apr 14 - Fri, Apr 24
Lufthansa Logo
5:40 pm - 3:45 pm
PHL
-
OPO
17h 05m
1 stop
Lufthansa Logo
4:35 pm - 4:05 pm
OPO
-
PHL
28h 30m
1 stop
$687Lufthansa
Thu, Apr 9 - Wed, Apr 22
Lufthansa Logo
5:40 pm - 11:25 pm
PHL
-
OPO
24h 45m
2 stops
Lufthansa Logo
6:20 am - 4:05 pm
OPO
-
PHL
14h 45m
2 stops
$708Lufthansa
Tue, Apr 14 - Fri, Apr 24
Lufthansa Logo
5:40 pm - 11:25 pm
PHL
-
OPO
24h 45m
2 stops
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$709Lufthansa
Tue, Apr 14 - Fri, Apr 24
Lufthansa Logo
5:40 pm - 11:25 pm
PHL
-
OPO
24h 45m
2 stops
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$710Lufthansa
Tue, Apr 14 - Fri, Apr 24
United Airlines Logo
7:45 pm - 9:45 am
PHL
-
OPO
33h 00m
2 stops
United Airlines Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$717United Airlines
Mon, Apr 6 - Thu, Apr 16
United Airlines Logo
6:54 pm - 3:40 pm
PHL
-
OPO
39h 46m
2 stops
United Airlines Logo
12:35 pm - 12:59 am
OPO
-
PHL
17h 24m
2 stops
$719United Airlines
Sat, May 2 - Tue, May 12
United Airlines Logo
7:45 pm - 9:45 am
PHL
-
OPO
33h 00m
2 stops
United Airlines Logo
6:00 am - 9:32 pm
OPO
-
PHL
20h 32m
2 stops
$721United Airlines
Mon, Apr 6 - Thu, Apr 16
Lufthansa Logo
5:40 pm - 11:25 pm
PHL
-
OPO
24h 45m
2 stops
Lufthansa Logo
6:20 am - 4:05 pm
OPO
-
PHL
14h 45m
2 stops
$732Lufthansa
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
Apr 14
PHL7:45 pmPhiladelphia
38h 55m
2 stops
OPO3:40 pmPorto
Apr 24
OPO6:00 amPorto
15h 05m
1 stop
PHL4:05 pmPhiladelphia
$671
United Airlines
Apr 6
PHL7:45 pmPhiladelphia
33h 00m
2 stops
OPO9:45 amPorto
Apr 16
OPO6:00 amPorto
15h 05m
1 stop
PHL4:05 pmPhiladelphia
$717
United Airlines
May 2
PHL6:54 pmPhiladelphia
39h 46m
2 stops
OPO3:40 pmPorto
May 12
OPO12:35 pmPorto
17h 24m
2 stops
PHL12:59 amPhiladelphia
$719

Iberia flights from Philadelphia to Porto

Our best Iberia deals on Philadelphia to Porto flight tickets
Iberia
Apr 15
PHL8:15 pmPhiladelphia
30h 25m
1 stop
OPO7:40 amPorto
Apr 22
OPO8:40 pmPorto
26h 00m
1 stop
PHL5:40 pmPhiladelphia
$757
Iberia
May 4
PHL2:45 pmPhiladelphia
16h 00m
2 stops
OPO11:45 amPorto
May 14
OPO8:40 pmPorto
26h 00m
1 stop
PHL5:40 pmPhiladelphia
$816
Iberia
May 4
PHL2:45 pmPhiladelphia
16h 00m
2 stops
OPO11:45 amPorto
May 11
OPO4:40 pmPorto
24h 30m
2 stops
PHL12:10 pmPhiladelphia
$826

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 March 21, 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

Cheapest round-trip

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

$671

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 4/14

5:40 pm-11:25 pm

2 stops24h 45m

Porto

Fri 4/24

6:00 am-4:05 pm

1 stop15h 05m

$684

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Thu 4/9

5:40 pm-3:45 pm

1 stop17h 05m

Porto

Wed 4/22

4:35 pm-4:05 pm

1 stop28h 30m

$687
Quickest round-trip

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 4/14

5:40 pm-11:25 pm

2 stops24h 45m

Porto

Fri 4/24

6:20 am-4:05 pm

2 stops14h 45m

$708

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 4/14

5:40 pm-11:25 pm

2 stops24h 45m

Porto

Fri 4/24

6:00 am-4:05 pm

1 stop15h 05m

$709

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 4/14

5:40 pm-11:25 pm

2 stops24h 45m

Porto

Fri 4/24

6:00 am-4:05 pm

1 stop15h 05m

$710

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 4/6

7:45 pm-9:45 am

2 stops33h 00m

Porto

Thu 4/16

6:00 am-4:05 pm

1 stop15h 05m

$717

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 5/2

6:54 pm-3:40 pm

2 stops39h 46m

Porto

Tue 5/12

12:35 pm-12:59 am

2 stops17h 24m

$719

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 4/6

7:45 pm-9:45 am

2 stops33h 00m

Porto

Thu 4/16

6:00 am-9:32 pm

2 stops20h 32m

$721

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 4/14

5:40 pm-11:25 pm

2 stops24h 45m

Porto

Fri 4/24

6:20 am-4:05 pm

2 stops14h 45m

$732

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 typical price of a round-trip flight between Philadelphia and Porto?

What is the cheapest month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from Philadelphia, with most prices found around $496. If you aren’t able to travel during the month of January, then book flights to Porto from Philadelphia during November instead. Flights to Porto in November, while not as cheap as those in January, still average around $612.

Can stopping save me money on Philadelphia to Porto flights?

You could potentially save up to 4% 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

14h 33m

Direct flights

None
The fastest flight from Philadelphia to Porto takes 14h 33m
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. 14h 33m 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
9,454 reviews
Search United Airlines flights
IberiaPriceFrom $546Free CancellationRating
7.0
3,146 reviews
Search Iberia flights
American AirlinesPriceFrom $567Free CancellationRating
7.1
11,484 reviews
Search American Airlines flights
LufthansaPriceFrom $568Free CancellationRating
6.8
7,858 reviews
Search Lufthansa 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
Esposende
Lamego
Chaves
Pinhao
Guimarães
Espinho
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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