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

TAP AIR PORTUGAL, United Airlines, and Air Canada are the most popular carriers operating 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?

As of November 2025, there are 8 operators available to choose from 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.

$305 Cheap Flights from Maryland to Porto in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Maryland to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:40 pm - 9:15 pmBWI-OPO

20h 35m2 stops

9:55 pm - 6:40 pmOPO-BWI

25h 45m2 stops

$473Multiple Airlines

Find Deal

dom., feb. 22 - jue., feb. 26

3:30 pm - 12:05 pmPHL-OPO

16h 35m2 stops

6:00 am - 4:00 pmOPO-PHL

15h 00m1 stop

$478Multiple Airlines

Find Deal

mié., mar. 18 - mar., mar. 31

11:48 am - 9:30 amPHL-OPO

17h 42m2 stops

6:00 am - 4:00 pmOPO-PHL

15h 00m1 stop

$479United Airlines

Find Deal

lun., mar. 16 - mar., mar. 31

3:30 pm - 12:05 pmPHL-OPO

16h 35m2 stops

11:05 am - 2:46 pmOPO-PHL

32h 41m2 stops

$480Air Canada

Find Deal

lun., mar. 16 - mar., mar. 31

8:05 pm - 9:30 amPHL-OPO

33h 25m2 stops

6:00 am - 4:00 pmOPO-PHL

15h 00m1 stop

$484United Airlines

Find Deal

sáb., mar. 21 - jue., abr. 2

7:50 am - 12:50 pmPHL-OPO

25h 00m2 stops

11:05 am - 2:46 pmOPO-PHL

32h 41m2 stops

$486Air Canada

Find Deal

dom., mar. 15 - mar., mar. 31

6:40 pm - 3:15 pmPHL-OPO

16h 35m1 stop

6:00 am - 4:00 pmOPO-PHL

15h 00m1 stop

$489Lufthansa

Find Deal

dom., mar. 15 - jue., abr. 2

12:23 pm - 10:30 amIAD-OPO

17h 07m2 stops

6:30 am - 8:47 pmOPO-IAD

19h 17m2 stops

$491Delta

Find Deal

mié., ene. 14 - vie., ene. 23

6:59 pm - 10:30 amBWI-OPO

34h 31m2 stops

6:35 am - 7:12 pmOPO-BWI

17h 37m2 stops

$491Delta

Find Deal

dom., ene. 11 - jue., ene. 22

10:55 pm - 10:25 pmIAD-OPO

18h 30m2 stops

6:00 am - 3:50 pmOPO-IAD

14h 50m1 stop

$509Lufthansa

Find Deal

dom., ene. 11 - jue., ene. 22

Lufthansa flights from Maryland to Porto

Our best Lufthansa deals on Maryland to Porto flight tickets

Lufthansa

Mar 15

PHL6:40 pmPhiladelphia

16h 35m

1 stop

OPO3:15 pmPorto

Apr 2

OPO6:00 amPorto

15h 00m

1 stop

PHL4:00 pmPhiladelphia

$489

Find similar

Lufthansa

Jan 11

IAD10:55 pmWashington, D.C. Dulles Intl

18h 30m

2 stops

OPO10:25 pmPorto

Jan 22

OPO6:00 amPorto

14h 50m

1 stop

IAD3:50 pmWashington, D.C. Dulles Intl

$509

Find similar

Lufthansa

Jan 22

IAD5:20 pmWashington, D.C. Dulles Intl

14h 30m

2 stops

OPO12:50 pmPorto

Jan 29

OPO6:00 amPorto

14h 50m

1 stop

IAD3:50 pmWashington, D.C. Dulles Intl

$524

Find similar

United Airlines flights from Maryland to Porto

Our best United Airlines deals on Maryland to Porto flight tickets

United Airlines

Mar 16

PHL11:48 amPhiladelphia

17h 42m

2 stops

OPO9:30 amPorto

Mar 31

OPO6:00 amPorto

15h 00m

1 stop

PHL4:00 pmPhiladelphia

$479

Find similar

United Airlines

Mar 21

PHL8:05 pmPhiladelphia

33h 25m

2 stops

OPO9:30 amPorto

Apr 2

OPO6:00 amPorto

15h 00m

1 stop

PHL4:00 pmPhiladelphia

$484

Find similar

United Airlines

Nov 24

PHL10:05 amPhiladelphia

18h 25m

2 stops

OPO9:30 amPorto

Dec 10

OPO12:30 pmPorto

32h 35m

1 stop

PHL4:05 pmPhiladelphia

$487

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

dom. 2/22

7:40 pm-9:15 pm

2 stops20h 35m

Porto

jue. 2/26

9:55 pm-6:40 pm

2 stops25h 45m

$473

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

mié. 3/18

3:30 pm-12:05 pm

2 stops16h 35m

Porto

mar. 3/31

6:00 am-4:00 pm

1 stop15h 00m

$478

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

lun. 3/16

11:48 am-9:30 am

2 stops17h 42m

Porto

mar. 3/31

6:00 am-4:00 pm

1 stop15h 00m

$479

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

lun. 3/16

3:30 pm-12:05 pm

2 stops16h 35m

Porto

mar. 3/31

11:05 am-2:46 pm

2 stops32h 41m

$480

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

sáb. 3/21

8:05 pm-9:30 am

2 stops33h 25m

Porto

jue. 4/2

6:00 am-4:00 pm

1 stop15h 00m

$484

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

dom. 3/15

7:50 am-12:50 pm

2 stops25h 00m

Porto

mar. 3/31

11:05 am-2:46 pm

2 stops32h 41m

$486

PhiladelphiaPorto

PHL - OPO

PHLOPO

Philadelphia

dom. 3/15

6:40 pm-3:15 pm

1 stop16h 35m

Porto

jue. 4/2

6:00 am-4:00 pm

1 stop15h 00m

$489

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 1/14

12:23 pm-10:30 am

2 stops17h 07m

Porto

vie. 1/23

6:30 am-8:47 pm

2 stops19h 17m

$491

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

dom. 1/11

6:59 pm-10:30 am

2 stops34h 31m

Porto

jue. 1/22

6:35 am-7:12 pm

2 stops17h 37m

$491

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

dom. 1/11

10:55 pm-10:25 pm

2 stops18h 30m

Porto

jue. 1/22

6:00 am-3:50 pm

1 stop14h 50m

$509

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 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

Prices

Airlines

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 $585. 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 $598.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Sunday when prices can be found for as low as $613. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $779. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the afternoon is the cheapest time of day to fly from Maryland to Porto when you can find flight prices for as low as $698. Flying to Porto in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $836 on average. Flights to Porto from Maryland at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $739 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 $665 on momondo.

Can stopping save me money on Maryland to Porto flights?

You could potentially save up to 2% 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

Direct flights	None

There are no direct flights from Maryland to Porto. There are no popular flight routes from Maryland to Porto.

Search flight deals

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?
As of November 2025, there are 8 operators available to choose from 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
Delta	PriceFrom $529	Free Cancellation	Rating 7.9 8,004 reviews		Search Delta flights

Vila Nova de Gaia

Coimbra

Aveiro

Matosinhos

Braga

Lamego

Guimarães

Esposende

Chaves

Espinho

Viseu

Ponte de Lima

Arcos de Valdevez

Pinhao

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.