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

Iberia 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 December 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.

$355 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

Cheap round-trip flights

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10:00 am - 9:00 pm

OPO

IAD

16h 00m1 stop

5:30 pm - 9:55 am

IAD

OPO

11h 25m1 stop

$459TAP AIR PORTUGAL

Fri, Jan 16 - Thu, Jan 29

11:00 am - 9:00 pm

OPO

IAD

15h 00m1 stop

10:35 pm - 3:00 pm

IAD

OPO

11h 25m1 stop

$505TAP AIR PORTUGAL

Fri, Jan 23 - Wed, Apr 8

6:00 am - 3:50 pm

OPO

IAD

14h 50m1 stop

8:45 pm - 6:30 pm

IAD

OPO

16h 45m1 stop

$586Multiple Airlines

Sat, Jan 24 - Wed, Apr 8

6:00 am - 8:55 am

OPO

DCA

31h 55m2 stops

6:00 am - 11:15 am

DCA

OPO

24h 15m2 stops

$588Air Canada

Thu, Jan 15 - Wed, Jan 28

6:00 am - 3:46 pm

OPO

IAD

38h 46m2 stops

9:45 am - 11:15 am

IAD

OPO

20h 30m2 stops

$588Air Canada

Thu, Jan 15 - Wed, Jan 28

8:40 pm - 3:35 pm

OPO

IAD

23h 55m2 stops

6:20 pm - 4:00 pm

IAD

OPO

16h 40m2 stops

$590Iberia

Fri, Jan 16 - Thu, Jan 29

6:00 am - 8:15 pm

OPO

IAD

19h 15m1 stop

1:05 pm - 3:25 pm

IAD

OPO

21h 20m2 stops

$591United Airlines

Thu, Jan 15 - Wed, Jan 28

6:00 am - 8:55 am

OPO

DCA

31h 55m2 stops

8:10 pm - 9:30 am

DCA

OPO

9h 20m1 stop

$593United Airlines

Thu, Mar 5 - Mon, Mar 9

11:45 am - 10:08 pm

OPO

DCA

15h 23m2 stops

6:30 pm - 3:30 pm

DCA

OPO

16h 00m2 stops

$606Multiple Airlines

Fri, Apr 3 - Tue, Apr 7

9:55 pm - 3:35 pm

OPO

PHL

22h 40m1 stop

7:55 pm - 4:00 pm

PHL

OPO

15h 05m1 stop

$786Iberia

Wed, Jan 21 - Wed, Jan 28

SWISS flights from Porto to Maryland

Our best SWISS deals on Porto to Maryland flight tickets

SWISS

Jan 21

OPO12:10 pmPorto

38h 26m

2 stops

PHL9:36 pmPhiladelphia

Jan 28

PHL1:10 pmPhiladelphia

17h 05m

2 stops

OPO11:15 amPorto

$798

Find similar

SWISS

Feb 26

OPO11:25 amPorto

39h 13m

2 stops

PHL9:38 pmPhiladelphia

Mar 3

PHL12:55 pmPhiladelphia

41h 20m

3 stops

OPO11:15 amPorto

$817

Find similar

Iberia flights from Porto to Maryland

Our best Iberia deals on Porto to Maryland flight tickets

Iberia

Jan 16

OPO8:40 pmPorto

23h 55m

2 stops

IAD3:35 pmWashington, D.C. Dulles Intl

Jan 29

IAD6:20 pmWashington, D.C. Dulles Intl

16h 40m

2 stops

OPO4:00 pmPorto

$590

Find similar

Iberia

Jan 21

OPO9:55 pmPorto

22h 40m

1 stop

PHL3:35 pmPhiladelphia

Jan 28

PHL7:55 pmPhiladelphia

15h 05m

1 stop

OPO4:00 pmPorto

$786

Find similar

Iberia

Feb 26

OPO9:55 pmPorto

22h 35m

1 stop

PHL3:30 pmPhiladelphia

Mar 3

PHL8:00 pmPhiladelphia

19h 00m

1 stop

OPO8:00 pmPorto

$795

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 1/16

10:00 am-9:00 pm

1 stop16h 00m

Washington, D.C. Dulles Intl

Thu 1/29

5:30 pm-9:55 am

1 stop11h 25m

$459

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 1/23

11:00 am-9:00 pm

1 stop15h 00m

Washington, D.C. Dulles Intl

Wed 4/8

10:35 pm-3:00 pm

1 stop11h 25m

$505

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 1/24

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Wed 4/8

8:45 pm-6:30 pm

1 stop16h 45m

$586

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 1/15

6:00 am-8:55 am

2 stops31h 55m

Washington, D.C. Reagan-National

Wed 1/28

6:00 am-11:15 am

2 stops24h 15m

$588

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/15

6:00 am-3:46 pm

2 stops38h 46m

Washington, D.C. Dulles Intl

Wed 1/28

9:45 am-11:15 am

2 stops20h 30m

$588

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 1/16

8:40 pm-3:35 pm

2 stops23h 55m

Washington, D.C. Dulles Intl

Thu 1/29

6:20 pm-4:00 pm

2 stops16h 40m

$590

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/15

6:00 am-8:15 pm

1 stop19h 15m

Washington, D.C. Dulles Intl

Wed 1/28

1:05 pm-3:25 pm

2 stops21h 20m

$591

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 3/5

6:00 am-8:55 am

2 stops31h 55m

Washington, D.C. Reagan-National

Mon 3/9

8:10 pm-9:30 am

1 stop9h 20m

$593

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Fri 4/3

11:45 am-10:08 pm

2 stops15h 23m

Washington, D.C. Reagan-National

Tue 4/7

6:30 pm-3:30 pm

2 stops16h 00m

$606

PortoPhiladelphia

OPO - PHL

OPOPHL

Porto

Wed 1/21

9:55 pm-3:35 pm

1 stop22h 40m

Philadelphia

Wed 1/28

7:55 pm-4:00 pm

1 stop15h 05m

$786

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 36% 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 40m
Direct flights	None

The fastest flight from Porto to Maryland takes 12h 40m

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 December 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.

Start using Trips

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Thu 1/8

Thu 1/15

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Find better results for your trip to Maryland

Popular cities in Maryland

Flights to New Yorkfrom $49

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Flights to Orlandofrom $47

Flights to San Franciscofrom $49

Flights to Las Vegasfrom $40

Flights to Washington, D.C.from $47

Flights to Bostonfrom $64

Flights to Atlantafrom $45

Flights to Dallasfrom $53

Flights to Seattlefrom $53

Cheap flights from Porto to Maryland from $355

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 4/13. 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

SWISS flights from Porto to Maryland

Our best SWISS deals on Porto to Maryland flight tickets

Iberia flights from Porto to Maryland

Our best Iberia deals on Porto to Maryland flight tickets

momondo Fare Finder

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 36% 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 and British Airways 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

Fastest flight time

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