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

Iberia, British Airways, and American Airlines 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.

$341 Cheap Flights from Porto to Maryland in 2026

Find the cheapest flights from Porto to Maryland

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:00 am - 8:35 pm

OPO

IAD

14h 35m

1 stop

5:40 pm - 9:00 am

IAD

OPO

10h 20m

1 stop

$573TAP AIR PORTUGAL

Mon, Oct 12 - Sun, Oct 18

8:20 am - 3:30 pm

OPO

IAD

12h 10m

1 stop

8:00 pm - 8:25 pm

IAD

OPO

43h 25m

2 stops

$607Multiple Airlines

Mon, Oct 12 - Sat, Oct 17

6:00 am - 4:05 pm

OPO

IAD

15h 05m

1 stop

10:41 pm - 6:55 am

IAD

OPO

27h 14m

1 stop

$642United Airlines

Sat, Sep 5 - Sat, Sep 5

12:25 pm - 10:57 pm

OPO

DCA

15h 32m

2 stops

5:45 pm - 11:45 am

DCA

OPO

13h 00m

2 stops

$643Iberia

Mon, Oct 5 - Tue, Dec 1

8:00 pm - 3:35 pm

OPO

IAD

24h 35m

1 stop

9:45 pm - 3:30 pm

IAD

OPO

12h 45m

1 stop

$650Multiple Airlines

Mon, Aug 24 - Sun, Sep 6

6:00 am - 4:05 pm

OPO

IAD

15h 05m

1 stop

6:00 pm - 11:45 am

IAD

OPO

12h 45m

1 stop

$652Lufthansa

Mon, Oct 5 - Tue, Dec 1

6:30 am - 7:45 pm

OPO

BWI

18h 15m

2 stops

1:00 pm - 10:35 am

BWI

OPO

16h 35m

2 stops

$673Delta

Mon, Oct 5 - Tue, Dec 1

11:25 am - 10:55 pm

OPO

DCA

16h 30m

2 stops

5:05 pm - 3:25 pm

DCA

OPO

17h 20m

2 stops

$679Delta

Mon, Oct 12 - Mon, Oct 19

6:00 am - 4:05 pm

OPO

IAD

15h 05m

1 stop

5:30 pm - 9:45 am

IAD

OPO

11h 15m

1 stop

$680United Airlines

Fri, Oct 9 - Sat, Oct 17

8:20 am - 5:50 pm

OPO

PHL

14h 30m

1 stop

8:30 pm - 4:00 pm

PHL

OPO

14h 30m

1 stop

$811Iberia

Mon, Oct 12 - Sun, Oct 18

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Air Canada flights from Porto to Maryland

Our best Air Canada deals on Porto to Maryland flight tickets

Air Canada

Nov 13

OPO6:00 amPorto

18h 58m

2 stops

DCA7:58 pmWashington, D.C. Reagan-National

Nov 17

DCA11:05 amWashington, D.C. Reagan-National

19h 10m

2 stops

OPO11:15 amPorto

$713

Air Canada

Nov 13

OPO6:00 amPorto

18h 58m

2 stops

DCA7:58 pmWashington, D.C. Reagan-National

Nov 17

DCA11:05 amWashington, D.C. Reagan-National

19h 10m

2 stops

OPO11:15 amPorto

$714

Air Canada

Jul 9

OPO11:50 amPorto

33h 45m

2 stops

IAD4:35 pmWashington, D.C. Dulles Intl

Jul 23

IAD10:10 pmWashington, D.C. Dulles Intl

27h 50m

2 stops

OPO7:00 amPorto

$795

United Airlines flights from Porto to Maryland

Our best United Airlines deals on Porto to Maryland flight tickets

United Airlines

Sep 5

OPO6:00 amPorto

15h 05m

1 stop

IAD4:05 pmWashington, D.C. Dulles Intl

Sep 5

IAD10:41 pmWashington, D.C. Dulles Intl

27h 14m

1 stop

OPO6:55 amPorto

$642

United Airlines

Oct 9

OPO6:00 amPorto

15h 05m

1 stop

IAD4:05 pmWashington, D.C. Dulles Intl

Oct 17

IAD5:30 pmWashington, D.C. Dulles Intl

11h 15m

1 stop

OPO9:45 amPorto

$680

United Airlines

Oct 12

OPO6:00 amPorto

15h 05m

1 stop

IAD4:05 pmWashington, D.C. Dulles Intl

Oct 21

IAD5:50 pmWashington, D.C. Dulles Intl

10h 55m

1 stop

OPO9:45 amPorto

$702

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 10/12

11:00 am-8:35 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Sun 10/18

5:40 pm-9:00 am

1 stop10h 20m

$573

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 10/12

8:20 am-3:30 pm

1 stop12h 10m

Washington, D.C. Dulles Intl

Sat 10/17

8:00 pm-8:25 pm

2 stops43h 25m

$607

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 9/5

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sat 9/5

10:41 pm-6:55 am

1 stop27h 14m

$642

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 10/5

12:25 pm-10:57 pm

2 stops15h 32m

Washington, D.C. Reagan-National

Tue 12/1

5:45 pm-11:45 am

2 stops13h 00m

$643

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 8/24

8:00 pm-3:35 pm

1 stop24h 35m

Washington, D.C. Dulles Intl

Sun 9/6

9:45 pm-3:30 pm

1 stop12h 45m

$650

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 10/5

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Tue 12/1

6:00 pm-11:45 am

1 stop12h 45m

$652

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Mon 10/5

6:30 am-7:45 pm

2 stops18h 15m

Baltimore/Washington

Tue 12/1

1:00 pm-10:35 am

2 stops16h 35m

$673

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 10/12

11:25 am-10:55 pm

2 stops16h 30m

Washington, D.C. Reagan-National

Mon 10/19

5:05 pm-3:25 pm

2 stops17h 20m

$679

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 10/9

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sat 10/17

5:30 pm-9:45 am

1 stop11h 15m

$680

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Mon 10/12

8:20 am-5:50 pm

1 stop14h 30m

Philadelphia

Sun 10/18

8:30 pm-4:00 pm

1 stop14h 30m

$811

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 46m
Direct flights	None

The fastest flight from Porto to Maryland takes 12h 46m

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.