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

American Airlines, Royal Air Maroc, and Iberia 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.

$402 Cheap Flights from Porto to Maryland in 2026

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0 bags

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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.

12:15 pm - 3:30 pm

OPO

IAD

32h 15m

1 stop

8:20 pm - 6:30 pm

IAD

OPO

17h 10m

1 stop

$665SWISS

Fri, May 22 - Thu, Jun 4

7:20 pm - 4:45 pm

OPO

IAD

26h 25m

1 stop

8:30 pm - 7:50 am

IAD

OPO

30h 20m

1 stop

$671SWISS

Thu, Oct 1 - Thu, Nov 5

6:00 am - 3:50 pm

OPO

IAD

14h 50m

1 stop

5:20 pm - 9:30 am

IAD

OPO

11h 10m

1 stop

$694United Airlines

Fri, Nov 6 - Mon, Nov 9

6:00 am - 4:05 pm

OPO

IAD

15h 05m

1 stop

6:33 am - 6:55 am

IAD

OPO

19h 22m

1 stop

$695United Airlines

Fri, Jun 5 - Fri, Jun 12

5:00 am - 5:07 pm

OPO

DCA

17h 07m

2 stops

11:00 am - 8:30 am

DCA

OPO

16h 30m

2 stops

$710Delta

Fri, May 22 - Thu, Jun 4

5:00 am - 7:16 pm

OPO

BWI

19h 16m

2 stops

1:59 pm - 10:30 am

BWI

OPO

15h 31m

2 stops

$714Delta

Thu, May 21 - Wed, Jun 3

11:05 am - 9:55 pm

OPO

DCA

15h 50m

2 stops

12:45 pm - 7:00 am

DCA

OPO

13h 15m

2 stops

$719Air Canada

Thu, May 28 - Wed, Jun 10

8:35 am - 10:15 pm

OPO

BWI

18h 40m

2 stops

8:30 pm - 7:50 am

BWI

OPO

30h 20m

3 stops

$737Multiple Airlines

Thu, May 21 - Wed, Jun 3

12:05 pm - 10:28 pm

OPO

DCA

15h 23m

2 stops

8:40 pm - 7:00 am

DCA

OPO

29h 20m

2 stops

$739Air Canada

Fri, Jun 12 - Tue, Jun 16

8:20 am - 7:29 pm

OPO

BWI

16h 09m

2 stops

9:30 pm - 10:25 am

BWI

OPO

31h 55m

1 stop

$746Multiple Airlines

Thu, May 21 - Wed, Jun 3

American Airlines flights from Porto to Maryland

Our best American Airlines deals on Porto to Maryland flight tickets

American Airlines

Nov 6

OPO8:20 amPorto

13h 00m

1 stop

IAD4:20 pmWashington, D.C. Dulles Intl

Nov 9

IAD9:12 amWashington, D.C. Dulles Intl

21h 33m

2 stops

OPO11:45 amPorto

$739

American Airlines

Nov 6

OPO8:20 amPorto

13h 00m

1 stop

IAD4:20 pmWashington, D.C. Dulles Intl

Nov 9

IAD9:12 amWashington, D.C. Dulles Intl

21h 33m

2 stops

OPO11:45 amPorto

$741

American Airlines

Nov 6

OPO8:20 amPorto

33h 52m

2 stops

IAD1:12 pmWashington, D.C. Dulles Intl

Nov 9

IAD4:34 pmWashington, D.C. Dulles Intl

34h 06m

2 stops

OPO7:40 amPorto

$744

United Airlines flights from Porto to Maryland

Our best United Airlines deals on Porto to Maryland flight tickets

United Airlines

Nov 6

OPO6:00 amPorto

14h 50m

1 stop

IAD3:50 pmWashington, D.C. Dulles Intl

Nov 9

IAD5:20 pmWashington, D.C. Dulles Intl

11h 10m

1 stop

OPO9:30 amPorto

$694

United Airlines

Jun 5

OPO6:00 amPorto

15h 05m

1 stop

IAD4:05 pmWashington, D.C. Dulles Intl

Jun 12

IAD6:33 amWashington, D.C. Dulles Intl

19h 22m

1 stop

OPO6:55 amPorto

$695

United Airlines

May 24

OPO6:00 amPorto

14h 15m

1 stop

IAD3:15 pmWashington, D.C. Dulles Intl

Jun 6

IAD8:15 amWashington, D.C. Dulles Intl

17h 40m

1 stop

OPO6:55 amPorto

$697

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 5/22

12:15 pm-3:30 pm

1 stop32h 15m

Washington, D.C. Dulles Intl

Thu 6/4

8:20 pm-6:30 pm

1 stop17h 10m

$665

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 10/1

7:20 pm-4:45 pm

1 stop26h 25m

Washington, D.C. Dulles Intl

Thu 11/5

8:30 pm-7:50 am

1 stop30h 20m

$671

Quickest round-trip

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 11/6

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Mon 11/9

5:20 pm-9:30 am

1 stop11h 10m

$694

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 6/5

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Fri 6/12

6:33 am-6:55 am

1 stop19h 22m

$695

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Fri 5/22

5:00 am-5:07 pm

2 stops17h 07m

Washington, D.C. Reagan-National

Thu 6/4

11:00 am-8:30 am

2 stops16h 30m

$710

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 5/21

5:00 am-7:16 pm

2 stops19h 16m

Baltimore/Washington

Wed 6/3

1:59 pm-10:30 am

2 stops15h 31m

$714

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 5/28

11:05 am-9:55 pm

2 stops15h 50m

Washington, D.C. Reagan-National

Wed 6/10

12:45 pm-7:00 am

2 stops13h 15m

$719

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 5/21

8:35 am-10:15 pm

2 stops18h 40m

Baltimore/Washington

Wed 6/3

8:30 pm-7:50 am

3 stops30h 20m

$737

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Fri 6/12

12:05 pm-10:28 pm

2 stops15h 23m

Washington, D.C. Reagan-National

Tue 6/16

8:40 pm-7:00 am

2 stops29h 20m

$739

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 5/21

8:20 am-7:29 pm

2 stops16h 09m

Baltimore/Washington

Wed 6/3

9:30 pm-10:25 am

1 stop31h 55m

$746

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

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.

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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.