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Cheap flights from Maryland to Porto from $274

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 6/23. 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
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.
United Airlines Logo
1:00 pm - 9:30 am
PHL
-
OPO
15h 30m
2 stops
United Airlines Logo
6:00 am - 3:51 pm
OPO
-
PHL
38h 51m
2 stops
$709United Airlines
Mon, Nov 9 - Fri, Nov 20
Air Canada Logo
3:20 pm - 12:50 pm
PHL
-
OPO
16h 30m
2 stops
Air Canada Logo
6:00 am - 3:51 pm
OPO
-
PHL
38h 51m
2 stops
$711Air Canada
Mon, Nov 9 - Fri, Nov 20
Multiple Airlines Logo
7:50 pm - 8:00 pm
PHL
-
OPO
19h 10m
1 stop
Multiple Airlines Logo
8:20 am - 9:26 pm
OPO
-
PHL
18h 06m
2 stops
$715Multiple Airlines
Mon, Nov 9 - Fri, Nov 20
Multiple Airlines Logo
10:30 am - 7:00 am
PHL
-
OPO
15h 30m
2 stops
Multiple Airlines Logo
6:00 am - 9:32 pm
OPO
-
PHL
20h 32m
2 stops
$734Multiple Airlines
Tue, Oct 13 - Fri, Oct 23
Scandinavian Airlines Logo
9:00 am - 4:55 pm
BWI
-
OPO
26h 55m
2 stops
Scandinavian Airlines Logo
11:55 am - 10:15 pm
OPO
-
BWI
39h 20m
2 stops
$795Scandinavian Airlines
Thu, Nov 12 - Mon, Nov 30
Delta Logo
5:33 pm - 3:25 pm
BWI
-
OPO
16h 52m
2 stops
Delta Logo
5:00 am - 4:57 pm
OPO
-
BWI
16h 57m
2 stops
$807Delta
Mon, Sep 21 - Tue, Sep 29
Delta Logo
10:40 am - 8:30 am
BWI
-
OPO
16h 50m
2 stops
Delta Logo
5:00 am - 5:15 pm
OPO
-
BWI
17h 15m
2 stops
$808Delta
Sun, Aug 16 - Tue, Aug 25
TAP AIR PORTUGAL Logo
10:35 pm - 11:10 pm
IAD
-
OPO
19h 35m
1 stop
TAP AIR PORTUGAL Logo
10:00 am - 8:35 pm
OPO
-
IAD
15h 35m
1 stop
$836TAP AIR PORTUGAL
Wed, Sep 30 - Sun, Oct 4
Scandinavian Airlines Logo
8:30 pm - 11:05 am
IAD
-
OPO
33h 35m
1 stop
Scandinavian Airlines Logo
5:50 pm - 7:10 pm
OPO
-
IAD
30h 20m
2 stops
$841Scandinavian Airlines
Mon, Nov 16 - Thu, Nov 19
TAP AIR PORTUGAL Logo
10:35 pm - 8:25 pm
IAD
-
OPO
16h 50m
1 stop
TAP AIR PORTUGAL Logo
6:00 am - 3:10 pm
OPO
-
IAD
14h 10m
1 stop
$870TAP AIR PORTUGAL
Thu, Aug 27 - Sun, Sep 20

TAP AIR PORTUGAL flights from Maryland to Porto

Our best TAP AIR PORTUGAL deals on Maryland to Porto flight tickets
TAP AIR PORTUGAL
Sep 30
IAD10:35 pmWashington, D.C. Dulles Intl
19h 35m
1 stop
OPO11:10 pmPorto
Oct 4
OPO10:00 amPorto
15h 35m
1 stop
IAD8:35 pmWashington, D.C. Dulles Intl
$836
TAP AIR PORTUGAL
Aug 27
IAD10:35 pmWashington, D.C. Dulles Intl
16h 50m
1 stop
OPO8:25 pmPorto
Sep 20
OPO6:00 amPorto
14h 10m
1 stop
IAD3:10 pmWashington, D.C. Dulles Intl
$870
TAP AIR PORTUGAL
Aug 27
IAD10:35 pmWashington, D.C. Dulles Intl
16h 50m
1 stop
OPO8:25 pmPorto
Sep 20
OPO7:05 amPorto
18h 30m
1 stop
IAD8:35 pmWashington, D.C. Dulles Intl
$879

American Airlines flights from Maryland to Porto

Our best American Airlines deals on Maryland to Porto flight tickets
American Airlines
Oct 13
PHL5:50 pmPhiladelphia
17h 10m
2 stops
OPO4:00 pmPorto
Oct 31
OPO8:40 pmPorto
24h 10m
1 stop
PHL4:50 pmPhiladelphia
$770
American Airlines
Oct 20
PHL8:30 pmPhiladelphia
14h 30m
1 stop
OPO4:00 pmPorto
Oct 28
OPO8:40 pmPorto
24h 10m
1 stop
PHL4:50 pmPhiladelphia
$796
American Airlines
Nov 12
DCA4:50 pmWashington, D.C. Reagan-National
13h 55m
2 stops
OPO11:45 amPorto
Nov 30
OPO8:20 amPorto
15h 50m
2 stops
DCA7:10 pmWashington, D.C. Reagan-National
$885

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 May 22, 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

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 11/9

1:00 pm-9:30 am

2 stops15h 30m

Porto

Fri 11/20

6:00 am-3:51 pm

2 stops38h 51m

$709

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 11/9

3:20 pm-12:50 pm

2 stops16h 30m

Porto

Fri 11/20

6:00 am-3:51 pm

2 stops38h 51m

$711

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Mon 11/9

7:50 pm-8:00 pm

1 stop19h 10m

Porto

Fri 11/20

8:20 am-9:26 pm

2 stops18h 06m

$715

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

Tue 10/13

10:30 am-7:00 am

2 stops15h 30m

Porto

Fri 10/23

6:00 am-9:32 pm

2 stops20h 32m

$734

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Thu 11/12

9:00 am-4:55 pm

2 stops26h 55m

Porto

Mon 11/30

11:55 am-10:15 pm

2 stops39h 20m

$795

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Mon 9/21

5:33 pm-3:25 pm

2 stops16h 52m

Porto

Tue 9/29

5:00 am-4:57 pm

2 stops16h 57m

$807

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Sun 8/16

10:40 am-8:30 am

2 stops16h 50m

Porto

Tue 8/25

5:00 am-5:15 pm

2 stops17h 15m

$808

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 9/30

10:35 pm-11:10 pm

1 stop19h 35m

Porto

Sun 10/4

10:00 am-8:35 pm

1 stop15h 35m

$836

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 11/16

8:30 pm-11:05 am

1 stop33h 35m

Porto

Thu 11/19

5:50 pm-7:10 pm

2 stops30h 20m

$841
Quickest round-trip

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Thu 8/27

10:35 pm-8:25 pm

1 stop16h 50m

Porto

Sun 9/20

6:00 am-3:10 pm

1 stop14h 10m

$870

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 February is, on average, the cheapest month to fly to Porto from Maryland, with most prices found around $0. If you aren’t able to travel during the month of February, then book flights to Porto from Maryland during January instead. Flights to Porto in January, while not as cheap as those in February, still average around $0.

How far in advance should I book a flight from Maryland 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 $780 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 3% 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 55m

Direct flights

None
The fastest flight from Maryland to Porto takes 9h 55m
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
8,449 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
Lamego
Chaves
Esposende
Pinhao
Espinho
Guimarães
Arcos de Valdevez
Viseu
Ponte de Lima
Curia
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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