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

Iberia, Royal Air Maroc, and British Airways 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 March 2026.

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.

$378 Cheap Flights from Porto to Maryland in 2026

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Find the cheapest flights from Porto to Maryland

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:30 pm - 3:10 pm

OPO

IAD

21h 40m

1 stop

10:35 pm - 7:00 pm

IAD

OPO

15h 25m

1 stop

$566TAP AIR PORTUGAL

Mon, Apr 13 - Sun, Apr 26

10:30 pm - 3:10 pm

OPO

IAD

21h 40m

1 stop

10:35 pm - 7:00 pm

IAD

OPO

15h 25m

1 stop

$572TAP AIR PORTUGAL

Mon, Apr 13 - Sun, Apr 26

6:00 am - 4:05 pm

OPO

IAD

15h 05m

1 stop

8:20 pm - 6:30 pm

IAD

OPO

17h 10m

1 stop

$637Multiple Airlines

Wed, Apr 22 - Wed, Apr 29

6:20 am - 7:25 pm

OPO

IAD

18h 05m

1 stop

8:20 pm - 6:15 pm

IAD

OPO

16h 55m

1 stop

$661Multiple Airlines

Sun, May 10 - Sun, May 17

6:00 am - 7:55 pm

OPO

IAD

18h 55m

1 stop

9:45 am - 7:00 am

IAD

OPO

16h 15m

1 stop

$665United Airlines

Tue, May 19 - Mon, Jun 8

6:00 am - 4:05 pm

OPO

IAD

15h 05m

1 stop

5:20 pm - 9:45 am

IAD

OPO

11h 25m

1 stop

$666United Airlines

Wed, Sep 23 - Sun, Sep 27

6:00 am - 4:05 pm

OPO

IAD

15h 05m

1 stop

10:20 pm - 11:25 pm

IAD

OPO

20h 05m

1 stop

$667Lufthansa

Fri, Apr 10 - Mon, Apr 20

6:00 am - 4:05 pm

OPO

IAD

15h 05m

1 stop

10:20 pm - 11:25 pm

IAD

OPO

20h 05m

1 stop

$671Lufthansa

Fri, Apr 10 - Mon, Apr 20

11:25 am - 11:40 pm

OPO

DCA

17h 15m

2 stops

5:00 pm - 3:25 pm

DCA

OPO

17h 25m

2 stops

$682Delta

Mon, Apr 13 - Sun, Apr 26

5:55 am - 5:49 pm

OPO

DCA

16h 54m

2 stops

5:00 pm - 3:25 pm

DCA

OPO

17h 25m

2 stops

$683Delta

Fri, Apr 10 - Mon, Apr 20

Lufthansa flights from Porto to Maryland

Our best Lufthansa deals on Porto to Maryland flight tickets

Lufthansa

Apr 10

OPO6:00 amPorto

15h 05m

1 stop

IAD4:05 pmWashington, D.C. Dulles Intl

Apr 20

IAD10:20 pmWashington, D.C. Dulles Intl

20h 05m

1 stop

OPO11:25 pmPorto

$667

Lufthansa

Apr 10

OPO6:00 amPorto

15h 05m

1 stop

IAD4:05 pmWashington, D.C. Dulles Intl

Apr 20

IAD10:20 pmWashington, D.C. Dulles Intl

20h 05m

1 stop

OPO11:25 pmPorto

$671

Lufthansa

May 9

OPO6:00 amPorto

18h 55m

1 stop

IAD7:55 pmWashington, D.C. Dulles Intl

May 16

IAD10:20 pmWashington, D.C. Dulles Intl

19h 25m

2 stops

OPO10:45 pmPorto

$725

United Airlines flights from Porto to Maryland

Our best United Airlines deals on Porto to Maryland flight tickets

United Airlines

May 19

OPO6:00 amPorto

18h 55m

1 stop

IAD7:55 pmWashington, D.C. Dulles Intl

Jun 8

IAD9:45 amWashington, D.C. Dulles Intl

16h 15m

1 stop

OPO7:00 amPorto

$665

United Airlines

Sep 23

OPO6:00 amPorto

15h 05m

1 stop

IAD4:05 pmWashington, D.C. Dulles Intl

Sep 27

IAD5:20 pmWashington, D.C. Dulles Intl

11h 25m

1 stop

OPO9:45 amPorto

$666

United Airlines

May 20

OPO6:00 amPorto

14h 05m

1 stop

IAD3:05 pmWashington, D.C. Dulles Intl

Jun 8

IAD3:45 pmWashington, D.C. Dulles Intl

10h 15m

1 stop

OPO7:00 amPorto

$669

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 4/13

10:30 pm-3:10 pm

1 stop21h 40m

Washington, D.C. Dulles Intl

Sun 4/26

10:35 pm-7:00 pm

1 stop15h 25m

$566

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 4/13

10:30 pm-3:10 pm

1 stop21h 40m

Washington, D.C. Dulles Intl

Sun 4/26

10:35 pm-7:00 pm

1 stop15h 25m

$572

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 4/22

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Wed 4/29

8:20 pm-6:30 pm

1 stop17h 10m

$637

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sun 5/10

6:20 am-7:25 pm

1 stop18h 05m

Washington, D.C. Dulles Intl

Sun 5/17

8:20 pm-6:15 pm

1 stop16h 55m

$661

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 5/19

6:00 am-7:55 pm

1 stop18h 55m

Washington, D.C. Dulles Intl

Mon 6/8

9:45 am-7:00 am

1 stop16h 15m

$665

Quickest round-trip

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 9/23

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sun 9/27

5:20 pm-9:45 am

1 stop11h 25m

$666

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 4/10

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Mon 4/20

10:20 pm-11:25 pm

1 stop20h 05m

$667

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 4/10

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Mon 4/20

10:20 pm-11:25 pm

1 stop20h 05m

$671

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 4/13

11:25 am-11:40 pm

2 stops17h 15m

Washington, D.C. Reagan-National

Sun 4/26

5:00 pm-3:25 pm

2 stops17h 25m

$682

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Fri 4/10

5:55 am-5:49 pm

2 stops16h 54m

Washington, D.C. Reagan-National

Mon 4/20

5:00 pm-3:25 pm

2 stops17h 25m

$683

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

Can stopping save me money on Porto to Maryland flights?

You could potentially save up to 25% 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

Fastest flight time	12h 10m
Direct flights	None

The fastest flight from Porto to Maryland takes 12h 10m

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 March 2026.
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.