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

Iberia, American Airlines, and TAP AIR PORTUGAL are the most popular carriers operating from Porto to Maryland

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

Prices for flights from Porto Airport to Maryland are refreshed on a daily basis.

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

There is 1 operator available for flights from Porto Airport to Maryland as of October 2025.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Porto Airport to Maryland.

What documentation or ID do you need to fly to Maryland?

The travel and health documents you'll need for your trip to Maryland may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Maryland. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$338 Cheap Flights from Porto to Maryland in 2025/26

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Find the cheapest flights from Porto to Maryland

Round-trip

One-way

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Cheap round-trip flights

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4:10 pm - 2:35 pmOPO-IAD

27h 25m1 stop

10:30 pm - 3:20 pmIAD-OPO

11h 50m1 stop

$483TAP AIR PORTUGAL

Find Deal

Mon, Nov 24 - Sun, Dec 7

5:55 pm - 2:35 pmOPO-IAD

25h 40m1 stop

10:30 pm - 5:00 pmIAD-OPO

13h 30m1 stop

$485TAP AIR PORTUGAL

Find Deal

Mon, Nov 3 - Sun, Nov 16

11:20 am - 7:15 pmOPO-IAD

12h 55m1 stop

12:11 pm - 10:30 amIAD-OPO

17h 19m2 stops

$560Delta

Find Deal

Thu, Nov 6 - Wed, Nov 19

11:20 am - 8:15 pmOPO-IAD

12h 55m1 stop

9:25 pm - 10:30 amIAD-OPO

32h 05m1 stop

$562Air France

Find Deal

Thu, Oct 30 - Sun, Nov 2

5:00 am - 10:56 pmOPO-DCA

22h 56m2 stops

11:13 am - 10:30 amDCA-OPO

18h 17m2 stops

$566Delta

Find Deal

Sun, Nov 23 - Sat, Dec 6

11:25 am - 10:56 pmOPO-DCA

16h 31m2 stops

2:55 pm - 10:30 amDCA-OPO

14h 35m2 stops

$568Air France

Find Deal

Mon, Nov 24 - Sun, Dec 7

11:15 am - 4:05 pmOPO-IAD

33h 50m1 stop

6:05 pm - 3:25 pmIAD-OPO

16h 20m1 stop

$569KLM

Find Deal

Mon, Nov 24 - Sun, Dec 7

6:35 am - 4:05 pmOPO-IAD

14h 30m1 stop

6:50 pm - 10:30 amIAD-OPO

10h 40m1 stop

$571KLM

Find Deal

Thu, Feb 5 - Sun, Feb 8

11:20 am - 11:00 pmOPO-IAD

15h 40m2 stops

9:25 pm - 10:30 amIAD-OPO

32h 05m1 stop

$580Multiple Airlines

Find Deal

Thu, Oct 30 - Sun, Nov 2

6:00 am - 3:50 pmOPO-IAD

14h 50m1 stop

9:45 am - 11:15 amIAD-OPO

20h 30m2 stops

$594Multiple Airlines

Find Deal

Thu, Nov 6 - Wed, Nov 19

Iberia flights from Porto to Maryland

Our best Iberia deals on Porto to Maryland flight tickets

Iberia

Nov 11

OPO8:40 pmPorto

24h 00m

1 stop

PHL3:40 pmPhiladelphia

Nov 18

PHL7:55 pmPhiladelphia

19h 05m

1 stop

OPO8:00 pmPorto

$806

Find similar

Iberia

Dec 24

OPO4:40 pmPorto

32h 15m

2 stops

IAD7:55 pmWashington, D.C. Dulles Intl

Jan 3

IAD5:05 pmWashington, D.C. Dulles Intl

17h 55m

2 stops

OPO4:00 pmPorto

$867

Find similar

American Airlines flights from Porto to Maryland

Our best American Airlines deals on Porto to Maryland flight tickets

American Airlines

Nov 3

OPO8:20 amPorto

15h 36m

2 stops

DCA6:56 pmWashington, D.C. Reagan-National

Nov 18

DCA12:42 pmWashington, D.C. Reagan-National

13h 58m

2 stops

OPO7:40 amPorto

$604

Find similar

American Airlines

Feb 19

OPO12:25 pmPorto

32h 10m

1 stop

PHL3:35 pmPhiladelphia

Feb 23

PHL6:35 pmPhiladelphia

16h 25m

2 stops

OPO4:00 pmPorto

$950

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 11/24

4:10 pm-2:35 pm

1 stop27h 25m

Washington, D.C. Dulles Intl

Sun 12/7

10:30 pm-3:20 pm

1 stop11h 50m

$483

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 11/3

5:55 pm-2:35 pm

1 stop25h 40m

Washington, D.C. Dulles Intl

Sun 11/16

10:30 pm-5:00 pm

1 stop13h 30m

$485

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 11/6

11:20 am-7:15 pm

1 stop12h 55m

Washington, D.C. Dulles Intl

Wed 11/19

12:11 pm-10:30 am

2 stops17h 19m

$560

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 10/30

11:20 am-8:15 pm

1 stop12h 55m

Washington, D.C. Dulles Intl

Sun 11/2

9:25 pm-10:30 am

1 stop32h 05m

$562

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 11/23

5:00 am-10:56 pm

2 stops22h 56m

Washington, D.C. Reagan-National

Sat 12/6

11:13 am-10:30 am

2 stops18h 17m

$566

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 11/24

11:25 am-10:56 pm

2 stops16h 31m

Washington, D.C. Reagan-National

Sun 12/7

2:55 pm-10:30 am

2 stops14h 35m

$568

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 11/24

11:15 am-4:05 pm

1 stop33h 50m

Washington, D.C. Dulles Intl

Sun 12/7

6:05 pm-3:25 pm

1 stop16h 20m

$569

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 2/5

6:35 am-4:05 pm

1 stop14h 30m

Washington, D.C. Dulles Intl

Sun 2/8

6:50 pm-10:30 am

1 stop10h 40m

$571

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 10/30

11:20 am-11:00 pm

2 stops15h 40m

Washington, D.C. Dulles Intl

Sun 11/2

9:25 pm-10:30 am

1 stop32h 05m

$580

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 11/6

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Wed 11/19

9:45 am-11:15 am

2 stops20h 30m

$594

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 Porto to Maryland

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 day to depart on your flight to Maryland?

The cheapest day to depart from Porto to Maryland is on a Thursday. Travelers who choose to depart for Maryland on a Thursday will often find tickets for as low as $616. The most expensive day to fly to Maryland is Saturday, with ticket prices averaging around $1,018.

What is the cheapest time of day to depart on your flight to Maryland?

Our most recent data shows that the best time of day to fly to Maryland is in the morning. Flights from Porto to Maryland during this time can be as low as $735. In contrast, the most expensive time of day to depart to Maryland is in the afternoon when prices are around $1,068.

Can stopping save me money on Porto to Maryland flights?

You could potentially save up to 19% on your flight if you consider stops on a Porto to Maryland flight.

Cheap Porto to Maryland flight deals and tips

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

Direct flights	None

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

Search flight deals

When did momondo last update prices for flights from Porto Airport to Maryland?
Prices for flights from Porto Airport to Maryland are refreshed on a daily basis.
How many operators does momondo search for flights from Porto Airport to Maryland?
There is 1 operator available for flights from Porto Airport to Maryland as of October 2025.
How old do you have to be to fly from Porto Airport to Maryland?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Porto Airport to Maryland.
What documentation or ID do you need to fly to Maryland?
The travel and health documents you'll need for your trip to Maryland may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Maryland. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

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 Porto to Maryland for you.

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

Yes. momondo allows you to filter the results for Porto to Maryland flights to just show those with flexible booking policies.

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

Once all potential Porto to Maryland flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Maryland from Porto 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.

An easier way to manage your Maryland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Sat 11/15

Sat 11/22

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Find better results for your trip to Maryland

Popular cities in Maryland

Flights to New Yorkfrom $48

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Flights to Orlandofrom $54

Flights to Las Vegasfrom $38

Flights to San Franciscofrom $48

Flights to Washington, D.C.from $50

Flights to Bostonfrom $55

Flights to Atlantafrom $45

Flights to Dallasfrom $63

Flights to Seattlefrom $71

Cheap flights from Porto to Maryland from $338

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Porto to Maryland departing on 12/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Porto to Maryland

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Iberia flights from Porto to Maryland

Our best Iberia deals on Porto to Maryland flight tickets

American Airlines flights from Porto to Maryland

Our best American Airlines deals on Porto to Maryland flight tickets

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Use the filters below to find and compare flights from Porto to Maryland that are best for you.

See travel insights to Maryland from

How to get the cheapest flight ticket from Porto to Maryland

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 day to depart on your flight to Maryland?

The cheapest day to depart from Porto to Maryland is on a Thursday. Travelers who choose to depart for Maryland on a Thursday will often find tickets for as low as $616. The most expensive day to fly to Maryland is Saturday, with ticket prices averaging around $1,018.

What is the cheapest time of day to depart on your flight to Maryland?

Our most recent data shows that the best time of day to fly to Maryland is in the morning. Flights from Porto to Maryland during this time can be as low as $735. In contrast, the most expensive time of day to depart to Maryland is in the afternoon when prices are around $1,068.

Can stopping save me money on Porto to Maryland flights?

You could potentially save up to 19% on your flight if you consider stops on a Porto to Maryland flight.

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

Iberia, American Airlines, and TAP AIR PORTUGAL are the most popular carriers operating from Porto to Maryland

Cheap Porto to Maryland flight deals and tips

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

Direct flights

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

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

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

What documentation or ID do you need to fly to Maryland?

Why use momondo?

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

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

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

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

An easier way to manage your Maryland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Maryland

Popular cities in Maryland

Popular flights according to clicks in the last 7 days on momondo