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Cheap flights from Maryland to Porto from $352

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Maryland to Porto departing on 5/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Maryland to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Turkish Airlines Logo
1:20 pm - 3:40 pm
IAD
-
OPO
21h 20m
1 stop
Turkish Airlines Logo
10:40 am - 11:35 am
OPO
-
IAD
29h 55m
1 stop
$623Turkish Airlines
Fri, Sep 18 - Fri, Oct 9
Turkish Airlines Logo
9:45 pm - 3:40 pm
IAD
-
OPO
36h 55m
1 stop
Turkish Airlines Logo
4:40 pm - 7:50 pm
OPO
-
IAD
32h 10m
1 stop
$625Turkish Airlines
Fri, Sep 11 - Thu, Sep 24
TAP AIR PORTUGAL Logo
5:45 pm - 3:00 pm
IAD
-
OPO
16h 15m
1 stop
TAP AIR PORTUGAL Logo
10:00 am - 8:35 pm
OPO
-
IAD
15h 35m
1 stop
$628TAP AIR PORTUGAL
Thu, Apr 30 - Thu, May 7
Turkish Airlines Logo
1:20 pm - 3:40 pm
IAD
-
OPO
21h 20m
1 stop
Turkish Airlines Logo
6:10 am - 11:35 am
OPO
-
IAD
34h 25m
1 stop
$632Turkish Airlines
Wed, Sep 23 - Thu, Oct 1
TAP AIR PORTUGAL Logo
10:35 pm - 5:00 pm
IAD
-
OPO
13h 25m
1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 3:10 pm
OPO
-
IAD
21h 40m
1 stop
$635TAP AIR PORTUGAL
Mon, Apr 20 - Thu, Jun 18
Lufthansa Logo
5:40 pm - 11:15 am
PHL
-
OPO
12h 35m
1 stop
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$759Lufthansa
Sun, Apr 19 - Sun, Apr 26
United Airlines Logo
10:00 am - 11:15 am
PHL
-
OPO
20h 15m
2 stops
United Airlines Logo
6:00 am - 4:05 pm
OPO
-
PHL
15h 05m
1 stop
$765United Airlines
Sun, Apr 19 - Sun, Apr 26
United Airlines Logo
10:05 am - 7:00 am
PHL
-
OPO
15h 55m
1 stop
United Airlines Logo
2:25 pm - 2:49 pm
OPO
-
PHL
29h 24m
1 stop
$767United Airlines
Mon, Aug 3 - Wed, Aug 19
Air Canada Logo
10:05 am - 7:00 am
PHL
-
OPO
15h 55m
1 stop
Air Canada Logo
11:50 am - 10:09 am
OPO
-
PHL
27h 19m
2 stops
$775Air Canada
Mon, Aug 3 - Thu, Aug 20
Air Canada Logo
4:20 pm - 7:00 am
DCA
-
OPO
9h 40m
1 stop
Air Canada Logo
12:15 pm - 12:00 pm
OPO
-
DCA
28h 45m
2 stops
$802Air Canada
Tue, Sep 22 - Tue, Oct 13

United Airlines flights from Maryland to Porto

Our best United Airlines deals on Maryland to Porto flight tickets
United Airlines
Apr 14
PHL10:00 amPhiladelphia
20h 10m
2 stops
OPO11:10 amPorto
Apr 24
OPO6:00 amPorto
15h 05m
1 stop
PHL4:05 pmPhiladelphia
$715
United Airlines
Apr 14
PHL1:27 pmPhiladelphia
16h 43m
2 stops
OPO11:10 amPorto
Apr 24
OPO12:35 pmPorto
17h 24m
2 stops
PHL12:59 amPhiladelphia
$739
United Airlines
Aug 3
PHL10:05 amPhiladelphia
15h 55m
1 stop
OPO7:00 amPorto
Aug 19
OPO2:25 pmPorto
29h 24m
1 stop
PHL2:49 pmPhiladelphia
$767

Air Canada flights from Maryland to Porto

Our best Air Canada deals on Maryland to Porto flight tickets
Air Canada
Aug 3
PHL10:05 amPhiladelphia
15h 55m
1 stop
OPO7:00 amPorto
Aug 20
OPO11:50 amPorto
27h 19m
2 stops
PHL10:09 amPhiladelphia
$775
Air Canada
Sep 22
DCA4:20 pmWashington, D.C. Reagan-National
9h 40m
1 stop
OPO7:00 amPorto
Oct 13
OPO12:15 pmPorto
28h 45m
2 stops
DCA12:00 pmWashington, D.C. Reagan-National
$802
Air Canada
Sep 28
DCA6:55 pmWashington, D.C. Reagan-National
31h 05m
2 stops
OPO7:00 amPorto
Oct 15
OPO11:40 amPorto
29h 20m
2 stops
DCA12:00 pmWashington, D.C. Reagan-National
$811

momondo Fare Finder

 
Customize your flight search to find flights from Maryland to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated April 6, 2026.
Use the filters below to find and compare flights from Maryland to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Fri 9/18

1:20 pm-3:40 pm

1 stop21h 20m

Porto

Fri 10/9

10:40 am-11:35 am

1 stop29h 55m

$623

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Fri 9/11

9:45 pm-3:40 pm

1 stop36h 55m

Porto

Thu 9/24

4:40 pm-7:50 pm

1 stop32h 10m

$625

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Thu 4/30

5:45 pm-3:00 pm

1 stop16h 15m

Porto

Thu 5/7

10:00 am-8:35 pm

1 stop15h 35m

$628

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 9/23

1:20 pm-3:40 pm

1 stop21h 20m

Porto

Thu 10/1

6:10 am-11:35 am

1 stop34h 25m

$632

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 4/20

10:35 pm-5:00 pm

1 stop13h 25m

Porto

Thu 6/18

10:30 pm-3:10 pm

1 stop21h 40m

$635
Quickest round-trip

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 4/19

5:40 pm-11:15 am

1 stop12h 35m

Porto

Sun 4/26

6:00 am-4:05 pm

1 stop15h 05m

$759

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Sun 4/19

10:00 am-11:15 am

2 stops20h 15m

Porto

Sun 4/26

6:00 am-4:05 pm

1 stop15h 05m

$765

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 8/3

10:05 am-7:00 am

1 stop15h 55m

Porto

Wed 8/19

2:25 pm-2:49 pm

1 stop29h 24m

$767

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 8/3

10:05 am-7:00 am

1 stop15h 55m

Porto

Thu 8/20

11:50 am-10:09 am

2 stops27h 19m

$775

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 9/22

4:20 pm-7:00 am

1 stop9h 40m

Porto

Tue 10/13

12:15 pm-12:00 pm

2 stops28h 45m

$802

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Porto from

How to get the cheapest flight ticket from Maryland to Porto

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 month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from Maryland, with most prices found around $552. If you aren’t able to travel during the month of January, then book flights to Porto from Maryland during October instead. Flights to Porto in October, while not as cheap as those in January, still average around $592.

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from Maryland when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $742 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Maryland for as low as $629 on momondo.

Can stopping save me money on Maryland to Porto flights?

You could potentially save up to 16% on your flight if you consider stops on a Maryland to Porto flight.

Cheap Maryland to Porto flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Maryland to Porto

Fastest flight time

9h 30m

Direct flights

None
The fastest flight from Maryland to Porto takes 9h 30m
There are no direct flights from Maryland to Porto. There are no popular flight routes from Maryland to Porto.
Search flight deals

Frequently asked questions about flying from Maryland to Porto

  • When did momondo last update prices for flights from Maryland to Porto Airport?

    Prices for flights from Maryland to Porto Airport were last updated today.

  • How many operators does momondo search for flights from Maryland to Porto Airport?

  • How old do you have to be to fly from Maryland to Porto Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Maryland to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The necessary travel and health documents for your Porto Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Maryland to Porto

Compare and see reviews for airlines that fly from Maryland to Porto with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $529Free CancellationRating
7.9
8,382 reviews
Search Delta flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Braga
Aveiro
Matosinhos
Esposende
Lamego
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Ponte de Lima
Viseu
Curia
Penafiel
Mesao Frio
Mira
Baiao

Why use momondo?

Why should I use momondo to find a flight deal from Maryland to Porto?

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 Maryland to Porto for you.

Can I find flights from Maryland to Porto with flexible booking policies on momondo?

Flights from Maryland to Porto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Maryland to Porto?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Porto from Maryland.

I’m not ready to book a flight from Maryland to Porto right now. Can momondo alert me if prices change?

Price alerts on flights to Porto from Maryland 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.

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