What is the cheapest airline that flies from Maryland to Porto?

TAP AIR PORTUGAL, Scandinavian Airlines, and British Airways are the most popular carriers operating from Maryland to Porto

When did momondo last update prices for flights from Maryland to Porto Airport?

Prices for flights from Maryland to Porto Airport were last updated today.

How many operators does momondo search for flights from Maryland to Porto Airport?

As of September 2025, there are 9 operators available to choose from for flights from Maryland to Porto Airport.

How old do you have to be to fly from Maryland to Porto Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Maryland to Porto Airport.

What documentation or ID do you need to fly to Porto Airport?

The necessary travel and health documents for your Porto Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$238 Cheap Flights from Maryland to Porto in 2025/26

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Find the cheapest flights from Maryland to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

5:35 pm - 3:40 pmPHL-OPO

17h 05m1 stop

6:00 am - 4:05 pmOPO-PHL

15h 05m1 stop

$473United Airlines

Find Deal

Sun, Oct 19 - Tue, Nov 4

1:41 pm - 10:30 amBWI-OPO

15h 49m2 stops

11:10 am - 12:28 amOPO-BWI

18h 18m2 stops

$478Delta

Find Deal

Tue, Nov 4 - Tue, Nov 18

4:50 pm - 6:15 pmPHL-OPO

20h 25m2 stops

6:00 am - 10:56 pmOPO-PHL

21h 56m2 stops

$481Air Canada

Find Deal

Sun, Oct 19 - Tue, Nov 4

5:35 pm - 3:40 pmPHL-OPO

17h 05m1 stop

6:00 am - 4:05 pmOPO-PHL

15h 05m1 stop

$486Lufthansa

Find Deal

Sun, Oct 19 - Tue, Nov 4

7:30 am - 12:00 pmPHL-OPO

23h 30m2 stops

6:00 am - 10:56 pmOPO-PHL

21h 56m2 stops

$493Air Canada

Find Deal

Sun, Oct 19 - Tue, Nov 4

4:50 pm - 6:15 pmPHL-OPO

20h 25m2 stops

6:00 am - 4:05 pmOPO-PHL

15h 05m1 stop

$504Multiple Airlines

Find Deal

Sun, Oct 19 - Tue, Nov 4

6:40 pm - 11:40 amPHL-OPO

13h 00m1 stop

12:30 pm - 4:05 pmOPO-PHL

32h 35m1 stop

$522Lufthansa

Find Deal

Tue, Oct 28 - Wed, Nov 5

6:00 am - 11:45 amBWI-OPO

24h 45m2 stops

8:20 am - 11:52 pmOPO-BWI

20h 32m2 stops

$522American Airlines

Find Deal

Thu, Nov 27 - Fri, Dec 5

3:30 pm - 11:10 amPHL-OPO

38h 40m2 stops

6:00 am - 4:35 pmOPO-PHL

15h 35m1 stop

$534Multiple Airlines

Find Deal

Sat, Nov 22 - Sat, Dec 6

8:45 am - 7:35 amPHL-OPO

17h 50m2 stops

8:15 am - 10:25 pmOPO-PHL

19h 10m2 stops

$569American Airlines

Find Deal

Tue, Sep 30 - Tue, Oct 7

United Airlines flights from Maryland to Porto

Our best United Airlines deals on Maryland to Porto flight tickets

United Airlines

Oct 19

PHL5:35 pmPhiladelphia

17h 05m

1 stop

OPO3:40 pmPorto

Nov 4

OPO6:00 amPorto

15h 05m

1 stop

PHL4:05 pmPhiladelphia

$473

Find similar

United Airlines

Oct 27

PHL3:00 pmPhiladelphia

14h 30m

2 stops

OPO9:30 amPorto

Nov 4

OPO6:00 amPorto

15h 05m

1 stop

PHL4:05 pmPhiladelphia

$478

Find similar

United Airlines

Oct 26

PHL10:34 amPhiladelphia

18h 56m

2 stops

OPO9:30 amPorto

Nov 4

OPO6:00 amPorto

15h 05m

1 stop

PHL4:05 pmPhiladelphia

$484

Find similar

Air Canada flights from Maryland to Porto

Our best Air Canada deals on Maryland to Porto flight tickets

Air Canada

Oct 19

PHL4:50 pmPhiladelphia

20h 25m

2 stops

OPO6:15 pmPorto

Nov 4

OPO6:00 amPorto

21h 56m

2 stops

PHL10:56 pmPhiladelphia

$481

Find similar

Air Canada

Oct 19

PHL7:30 amPhiladelphia

23h 30m

2 stops

OPO12:00 pmPorto

Nov 4

OPO6:00 amPorto

21h 56m

2 stops

PHL10:56 pmPhiladelphia

$493

Find similar

Air Canada

Oct 15

IAD3:36 pmWashington, D.C. Dulles Intl

21h 54m

2 stops

OPO6:30 pmPorto

Oct 22

OPO6:00 amPorto

20h 05m

2 stops

IAD9:05 pmWashington, D.C. Dulles Intl

$584

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 10/19

5:35 pm-3:40 pm

1 stop17h 05m

Porto

Tue 11/4

6:00 am-4:05 pm

1 stop15h 05m

$473

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 11/4

1:41 pm-10:30 am

2 stops15h 49m

Porto

Tue 11/18

11:10 am-12:28 am

2 stops18h 18m

$478

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 10/19

4:50 pm-6:15 pm

2 stops20h 25m

Porto

Tue 11/4

6:00 am-10:56 pm

2 stops21h 56m

$481

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 10/19

5:35 pm-3:40 pm

1 stop17h 05m

Porto

Tue 11/4

6:00 am-4:05 pm

1 stop15h 05m

$486

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 10/19

7:30 am-12:00 pm

2 stops23h 30m

Porto

Tue 11/4

6:00 am-10:56 pm

2 stops21h 56m

$493

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 10/19

4:50 pm-6:15 pm

2 stops20h 25m

Porto

Tue 11/4

6:00 am-4:05 pm

1 stop15h 05m

$504

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 10/28

6:40 pm-11:40 am

1 stop13h 00m

Porto

Wed 11/5

12:30 pm-4:05 pm

1 stop32h 35m

$522

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Thu 11/27

6:00 am-11:45 am

2 stops24h 45m

Porto

Fri 12/5

8:20 am-11:52 pm

2 stops20h 32m

$522

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sat 11/22

3:30 pm-11:10 am

2 stops38h 40m

Porto

Sat 12/6

6:00 am-4:35 pm

1 stop15h 35m

$534

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 9/30

8:45 am-7:35 am

2 stops17h 50m

Porto

Tue 10/7

8:15 am-10:25 pm

2 stops19h 10m

$569

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Maryland 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

Prices

Airlines

What is the cheapest month to fly to Porto?

The month of November is, on average, the cheapest month to fly to Porto from Maryland, with most prices found around $529. If you aren’t able to travel during the month of November, then book flights to Porto from Maryland during January instead. Flights to Porto in January, while not as cheap as those in November, still average around $585.

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 $613. 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 Friday because tickets tend to average around $779. 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 afternoon is the cheapest time of day to fly from Maryland to Porto when you can find flight prices for as low as $698. Flying to Porto in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $836 on average. Flights to Porto from Maryland at noon 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 Maryland when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $735 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Maryland for as low as $672 on momondo.

Can stopping save me money on Maryland to Porto flights?

You could potentially save up to 2% on your flight if you consider stops on a Maryland to Porto flight.

Cheap Maryland to Porto flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Maryland to Porto

Direct flights	None

There are no direct flights from Maryland to Porto. There are no popular flight routes from Maryland to Porto.

Search flight deals

When did momondo last update prices for flights from Maryland to Porto Airport?
Prices for flights from Maryland to Porto Airport were last updated today.
How many operators does momondo search for flights from Maryland to Porto Airport?
As of September 2025, there are 9 operators available to choose from for flights from Maryland to Porto Airport.
How old do you have to be to fly from Maryland to Porto Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Maryland to Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The necessary travel and health documents for your Porto Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Maryland to Porto

Compare and see reviews for airlines that fly from Maryland to Porto with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $529	Free Cancellation	Rating 7.9 7,964 reviews		Search Delta flights

Vila Nova de Gaia

Aveiro

Coimbra

Braga

Matosinhos

Caminha

Guimarães

Esposende

Lamego

Chaves

Espinho

Arcos de Valdevez

Viseu

Ponte de Lima

Pinhao

Santa Maria da Feira

Curia

Penafiel

Mesao Frio

Mira

Why use momondo?

Why should I use momondo to find a flight deal from Maryland to Porto?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Maryland to Porto for you.

Can I find flights from Maryland to Porto with flexible booking policies on momondo?

Flights from Maryland to Porto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Maryland to Porto?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Porto from Maryland.

I’m not ready to book a flight from Maryland to Porto right now. Can momondo alert me if prices change?

Price alerts on flights to Porto from Maryland are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.