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

Iberia, American Airlines, and Delta 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 December 2025, there are 8 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.

$267 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

Enter your travel dates to find the best prices.

10:30 pm - 7:00 pm

IAD

OPO

15h 30m1 stop

4:10 pm - 2:35 pm

OPO

IAD

27h 25m1 stop

$469TAP AIR PORTUGAL

อา., ม.ค. 18 - จ., ก.พ. 2

10:30 pm - 9:55 am

IAD

OPO

30h 25m1 stop

8:00 pm - 10:00 pm

OPO

IAD

30h 00m1 stop

$471TAP AIR PORTUGAL

พ., ก.พ. 25 - อ., มี.ค. 10

10:30 pm - 10:00 pm

IAD

OPO

18h 30m1 stop

7:00 am - 4:15 pm

OPO

IAD

13h 15m1 stop

$472TAP AIR PORTUGAL

พ., ก.พ. 25 - พฤ., มี.ค. 12

10:33 am - 9:45 am

PHL

OPO

18h 12m2 stops

6:00 am - 4:00 pm

OPO

PHL

15h 00m1 stop

$486United Airlines

พ., เม.ย. 22 - ศ., พ.ค. 8

3:30 pm - 1:15 pm

PHL

OPO

16h 45m2 stops

6:00 am - 10:46 pm

OPO

PHL

21h 46m2 stops

$489Air Canada

พ., ก.พ. 18 - พ., ก.พ. 25

3:30 pm - 1:15 pm

PHL

OPO

16h 45m2 stops

6:00 am - 10:46 pm

OPO

PHL

21h 46m2 stops

$490Air Canada

พ., ก.พ. 18 - พ., ก.พ. 25

10:33 am - 9:45 am

PHL

OPO

18h 12m2 stops

6:00 am - 12:45 am

OPO

PHL

23h 45m2 stops

$491United Airlines

พ., เม.ย. 22 - ศ., พ.ค. 8

5:35 pm - 6:30 pm

PHL

OPO

19h 55m2 stops

7:20 pm - 5:32 pm

OPO

PHL

27h 12m2 stops

$524SWISS

อา., เม.ย. 19 - พฤ., เม.ย. 30

5:00 pm - 3:25 pm

DCA

OPO

17h 25m2 stops

11:45 am - 11:40 pm

OPO

DCA

16h 55m2 stops

$527Delta

พ., เม.ย. 22 - พ., พ.ค. 6

5:00 pm - 3:30 pm

DCA

OPO

17h 30m2 stops

5:00 am - 4:35 pm

OPO

DCA

16h 35m2 stops

$532Delta

จ., เม.ย. 20 - อ., พ.ค. 5

United Airlines flights from Maryland to Porto

Our best United Airlines deals on Maryland to Porto flight tickets

United Airlines

Apr 22

PHL10:33 amPhiladelphia

18h 12m

2 stops

OPO9:45 amPorto

May 8

OPO6:00 amPorto

15h 00m

1 stop

PHL4:00 pmPhiladelphia

$486

Find similar

United Airlines

Apr 22

PHL10:33 amPhiladelphia

18h 12m

2 stops

OPO9:45 amPorto

May 8

OPO6:00 amPorto

23h 45m

2 stops

PHL12:45 amPhiladelphia

$491

Find similar

United Airlines

Apr 14

PHL1:27 pmPhiladelphia

16h 43m

2 stops

OPO11:10 amPorto

Apr 24

OPO6:00 amPorto

15h 00m

1 stop

PHL4:00 pmPhiladelphia

$496

Find similar

TAP AIR PORTUGAL flights from Maryland to Porto

Our best TAP AIR PORTUGAL deals on Maryland to Porto flight tickets

TAP AIR PORTUGAL

Jan 18

IAD10:30 pmWashington, D.C. Dulles Intl

15h 30m

1 stop

OPO7:00 pmPorto

Feb 2

OPO4:10 pmPorto

27h 25m

1 stop

IAD2:35 pmWashington, D.C. Dulles Intl

$469

Find similar

TAP AIR PORTUGAL

Feb 25

IAD10:30 pmWashington, D.C. Dulles Intl

30h 25m

1 stop

OPO9:55 amPorto

Mar 10

OPO8:00 pmPorto

30h 00m

1 stop

IAD10:00 pmWashington, D.C. Dulles Intl

$471

Find similar

TAP AIR PORTUGAL

Feb 25

IAD10:30 pmWashington, D.C. Dulles Intl

18h 30m

1 stop

OPO10:00 pmPorto

Mar 12

OPO7:00 amPorto

13h 15m

1 stop

IAD4:15 pmWashington, D.C. Dulles Intl

$472

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

อา. 1/18

10:30 pm-7:00 pm

1 stop15h 30m

Porto

จ. 2/2

4:10 pm-2:35 pm

1 stop27h 25m

$469

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

พ. 2/25

10:30 pm-9:55 am

1 stop30h 25m

Porto

อ. 3/10

8:00 pm-10:00 pm

1 stop30h 00m

$471

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

พ. 2/25

10:30 pm-10:00 pm

1 stop18h 30m

Porto

พฤ. 3/12

7:00 am-4:15 pm

1 stop13h 15m

$472

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

พ. 4/22

10:33 am-9:45 am

2 stops18h 12m

Porto

ศ. 5/8

6:00 am-4:00 pm

1 stop15h 00m

$486

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

พ. 2/18

3:30 pm-1:15 pm

2 stops16h 45m

Porto

พ. 2/25

6:00 am-10:46 pm

2 stops21h 46m

$489

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

พ. 2/18

3:30 pm-1:15 pm

2 stops16h 45m

Porto

พ. 2/25

6:00 am-10:46 pm

2 stops21h 46m

$490

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

พ. 4/22

10:33 am-9:45 am

2 stops18h 12m

Porto

ศ. 5/8

6:00 am-12:45 am

2 stops23h 45m

$491

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

อา. 4/19

5:35 pm-6:30 pm

2 stops19h 55m

Porto

พฤ. 4/30

7:20 pm-5:32 pm

2 stops27h 12m

$524

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

พ. 4/22

5:00 pm-3:25 pm

2 stops17h 25m

Porto

พ. 5/6

11:45 am-11:40 pm

2 stops16h 55m

$527

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

จ. 4/20

5:00 pm-3:30 pm

2 stops17h 30m

Porto

อ. 5/5

5:00 am-4:35 pm

2 stops16h 35m

$532

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 October is, on average, the cheapest month to fly to Porto from Maryland, with most prices found around $594. If you aren’t able to travel during the month of October, then book flights to Porto from Maryland during January instead. Flights to Porto in January, while not as cheap as those in October, still average around $613.

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 $723 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 $663 on momondo.

Can stopping save me money on Maryland to Porto flights?

You could potentially save up to 17% 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

Fastest flight time	9h 35m
Direct flights	None

The fastest flight from Maryland to Porto takes 9h 35m

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 December 2025, there are 8 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 8,013 reviews		Search Delta flights

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Matosinhos

Guimarães

Esposende

Lamego

Chaves

Viseu

Espinho

Arcos de Valdevez

Pinhao

Ponte de Lima

Curia

Penafiel

Mesao Frio

Mira

Baiao

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.