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

Iberia, British Airways, and Finnair 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 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.

$346 Cheap Flights from Porto to Maryland in 2026

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.

9:00 am - 3:10 pmOPO Porto-IAD Washington, D.C. Dulles Intl

11h 10m1 stop Lisbon Humberto Delgado

10:35 pm - 7:00 pmIAD Washington, D.C. Dulles Intl-OPO Porto

15h 25m1 stop Lisbon Humberto Delgado

$584TAP AIR PORTUGAL

Thu, Sep 17 - Wed, Sep 30

8:20 am - 6:55 pmOPO Porto-IAD Washington, D.C. Dulles Intl

15h 35m1 stop Madrid Barajas

5:00 pm - 11:45 amIAD Washington, D.C. Dulles Intl-OPO Porto

13h 45m1 stop Madrid Barajas

$591American Airlines

Thu, Sep 17 - Fri, Oct 2

7:00 am - 3:15 pmOPO Porto-IAD Washington, D.C. Dulles Intl

13h 15m1 stop Lisbon Humberto Delgado

10:30 pm - 6:00 pmIAD Washington, D.C. Dulles Intl-OPO Porto

14h 30m1 stop Lisbon Humberto Delgado

$593TAP AIR PORTUGAL

Thu, Nov 26 - Sun, Nov 29

10:30 pm - 3:10 pmOPO Porto-IAD Washington, D.C. Dulles Intl

21h 40m1 stop Lisbon Humberto Delgado

5:05 pm - 8:00 amIAD Washington, D.C. Dulles Intl-OPO Porto

9h 55m1 stop Lisbon Humberto Delgado

$596TAP AIR PORTUGAL

Tue, Sep 15 - Tue, Sep 22

8:30 am - 8:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl

17h 05m1 stop Lisbon Humberto Delgado

5:25 pm - 10:00 amIAD Washington, D.C. Dulles Intl-OPO Porto

11h 35m1 stop Lisbon Humberto Delgado

$602TAP AIR PORTUGAL

Wed, Nov 25 - Mon, Nov 30

5:00 am - 3:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl

15h 35m1 stop Amsterdam Schiphol

6:26 pm - 3:25 pmIAD Washington, D.C. Dulles Intl-OPO Porto

15h 59m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

$603Delta

Thu, Sep 17 - Wed, Sep 30

5:00 am - 3:35 pmOPO Porto-IAD Washington, D.C. Dulles Intl

15h 35m1 stop Amsterdam Schiphol

7:15 pm - 3:30 pmIAD Washington, D.C. Dulles Intl-OPO Porto

15h 15m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

$605Delta

Wed, Sep 2 - Sun, Sep 6

5:00 am - 5:46 pmOPO Porto-IAD Washington, D.C. Dulles Intl

17h 46m2 stops Amsterdam Schiphol New York John F Kennedy Intl

6:26 pm - 3:25 pmIAD Washington, D.C. Dulles Intl-OPO Porto

15h 59m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

$608Delta

Thu, Sep 17 - Wed, Sep 30

6:15 am - 4:05 pmOPO Porto-IAD Washington, D.C. Dulles Intl

14h 50m1 stop Paris Charles de Gaulle

6:26 pm - 3:25 pmIAD Washington, D.C. Dulles Intl-OPO Porto

15h 59m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

$609Delta

Tue, Sep 15 - Tue, Sep 22

5:00 am - 5:27 pmOPO Porto-BWI Baltimore/Washington

17h 27m2 stops Amsterdam Schiphol Boston Logan Intl

6:19 pm - 3:25 pmBWI Baltimore/Washington-OPO Porto

16h 06m2 stops Boston Logan Intl Paris Charles de Gaulle

$610Delta

Thu, Sep 17 - Fri, Oct 2

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SWISS flights from Porto to Maryland

Our best SWISS deals on Porto to Maryland flight tickets

SWISS

Aug 27

OPO7:20 pmPorto

24h 00m

2 stops

IAD2:20 pmWashington, D.C. Dulles Intl

Sep 10

IAD8:20 pmWashington, D.C. Dulles Intl

17h 50m

2 stops

OPO7:10 pmPorto

$753

SWISS

Aug 27

OPO7:20 pmPorto

24h 00m

2 stops

IAD2:20 pmWashington, D.C. Dulles Intl

Sep 10

IAD8:20 pmWashington, D.C. Dulles Intl

17h 50m

2 stops

OPO7:10 pmPorto

$754

SWISS

Aug 27

OPO7:20 pmPorto

24h 00m

2 stops

IAD2:20 pmWashington, D.C. Dulles Intl

Sep 10

IAD8:20 pmWashington, D.C. Dulles Intl

17h 50m

2 stops

OPO7:10 pmPorto

$794

American Airlines flights from Porto to Maryland

Our best American Airlines deals on Porto to Maryland flight tickets

American Airlines

Sep 17

OPO8:20 amPorto

15h 35m

1 stop

IAD6:55 pmWashington, D.C. Dulles Intl

Oct 2

IAD5:00 pmWashington, D.C. Dulles Intl

13h 45m

1 stop

OPO11:45 amPorto

$591

American Airlines

Oct 15

OPO8:20 amPorto

15h 40m

1 stop

IAD7:00 pmWashington, D.C. Dulles Intl

Oct 18

IAD5:01 amWashington, D.C. Dulles Intl

21h 39m

2 stops

OPO7:40 amPorto

$614

American Airlines

Oct 15

OPO8:20 amPorto

15h 40m

1 stop

IAD7:00 pmWashington, D.C. Dulles Intl

Oct 18

IAD5:01 amWashington, D.C. Dulles Intl

21h 39m

2 stops

OPO7:40 amPorto

$615

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Thu 9/17

9:00 am-3:10 pm

1 stop11h 10m

Washington, D.C. Dulles Intl

Wed 9/30

10:35 pm-7:00 pm

1 stop15h 25m

$584

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Thu 9/17

8:20 am-6:55 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Fri 10/2

5:00 pm-11:45 am

1 stop13h 45m

$591

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Thu 11/26

7:00 am-3:15 pm

1 stop13h 15m

Washington, D.C. Dulles Intl

Sun 11/29

10:30 pm-6:00 pm

1 stop14h 30m

$593

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Tue 9/15

10:30 pm-3:10 pm

1 stop21h 40m

Washington, D.C. Dulles Intl

Tue 9/22

5:05 pm-8:00 am

1 stop9h 55m

$596

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Wed 11/25

8:30 am-8:35 pm

1 stop17h 05m

Washington, D.C. Dulles Intl

Mon 11/30

5:25 pm-10:00 am

1 stop11h 35m

$602

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Thu 9/17

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Wed 9/30

6:26 pm-3:25 pm

2 stops15h 59m

$603

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Wed 9/2

5:00 am-3:35 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

Sun 9/6

7:15 pm-3:30 pm

2 stops15h 15m

$605

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Thu 9/17

5:00 am-5:46 pm

2 stops17h 46m

Washington, D.C. Dulles Intl

Wed 9/30

6:26 pm-3:25 pm

2 stops15h 59m

$608

PortoWashington, D.C.

OPO Porto - IAD Washington, D.C. Dulles Intl

OPOIAD

Porto

Tue 9/15

6:15 am-4:05 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Tue 9/22

6:26 pm-3:25 pm

2 stops15h 59m

$609

PortoBaltimore

OPO Porto - BWI Baltimore/Washington

OPOBWI

Porto

Thu 9/17

5:00 am-5:27 pm

2 stops17h 27m

Baltimore/Washington

Fri 10/2

6:19 pm-3:25 pm

2 stops16h 06m

$610

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 9% 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

Best Price Found	$346
Fastest flight time	13h 15m
Direct flights	None

The best one-way flight to Maryland from Porto in the past 72 hours is $346. The best round-trip flight deal from Porto to Maryland found on momondo in the last 72 hours is $584.

The fastest flight from Porto to Maryland takes 13h 15m

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

Search flight deals

Frequently asked questions about flying 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 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.