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Cheap flights from Porto to Washington, D.C. from $421

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 Washington, D.C. departing on 6/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Porto to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 am - 12:38 am
OPO
-
BWI
23h 38m
2 stops
United Airlines Logo
6:17 am - 7:00 am
BWI
-
OPO
19h 43m
2 stops
$706United Airlines
Fri, Sep 25 - Wed, Sep 30
Delta Logo
11:45 am - 10:10 pm
OPO
-
BWI
15h 25m
2 stops
Delta Logo
12:15 pm - 10:30 am
BWI
-
OPO
17h 15m
2 stops
$719Delta
Wed, Oct 14 - Wed, Oct 21
United Airlines Logo
12:10 pm - 12:38 am
OPO
-
BWI
17h 28m
2 stops
United Airlines Logo
10:45 am - 9:30 am
BWI
-
OPO
17h 45m
2 stops
$736United Airlines
Thu, Oct 1 - Thu, Nov 5
United Airlines Logo
12:35 pm - 12:33 am
OPO
-
BWI
16h 58m
2 stops
United Airlines Logo
6:20 am - 6:15 am
BWI
-
OPO
18h 55m
2 stops
$766United Airlines
Tue, Jun 9 - Tue, Jun 16
British Airways Logo
8:55 pm - 7:40 pm
OPO
-
BWI
27h 45m
1 stop
British Airways Logo
9:35 pm - 8:35 pm
BWI
-
OPO
18h 00m
1 stop
$788British Airways
Tue, Jun 16 - Sun, Jun 21
Delta Logo
5:55 am - 5:42 pm
OPO
-
BWI
16h 47m
2 stops
Delta Logo
11:52 am - 10:30 am
BWI
-
OPO
17h 38m
2 stops
$827Delta
Thu, Jul 16 - Tue, Jul 28
United Airlines Logo
6:00 am - 5:33 pm
OPO
-
BWI
16h 33m
2 stops
United Airlines Logo
10:44 am - 6:55 am
BWI
-
OPO
15h 11m
2 stops
$830United Airlines
Wed, May 27 - Sat, May 30
British Airways Logo
9:55 am - 7:40 pm
OPO
-
BWI
14h 45m
1 stop
British Airways Logo
9:35 pm - 8:35 pm
BWI
-
OPO
18h 00m
1 stop
$841British Airways
Thu, Jul 9 - Sun, Jul 12
British Airways Logo
9:25 pm - 7:40 pm
OPO
-
BWI
27h 15m
1 stop
British Airways Logo
8:35 pm - 7:15 pm
BWI
-
OPO
17h 40m
1 stop
$850British Airways
Mon, May 25 - Sat, Jan 30
British Airways Logo
9:55 am - 7:40 pm
OPO
-
BWI
14h 45m
1 stop
British Airways Logo
9:30 pm - 7:30 pm
BWI
-
OPO
17h 00m
1 stop
$853British Airways
Thu, Jul 16 - Tue, Jul 28

British Airways flights from Porto to Baltimore

Our best British Airways deals on Porto to Baltimore flight tickets
British Airways
Jun 16
OPO8:55 pmPorto
27h 45m
1 stop
BWI7:40 pmBaltimore/Washington
Jun 21
BWI9:35 pmBaltimore/Washington
18h 00m
1 stop
OPO8:35 pmPorto
$788
British Airways
Jul 9
OPO9:55 amPorto
14h 45m
1 stop
BWI7:40 pmBaltimore/Washington
Jul 12
BWI9:35 pmBaltimore/Washington
18h 00m
1 stop
OPO8:35 pmPorto
$841
British Airways
May 25
OPO9:25 pmPorto
27h 15m
1 stop
BWI7:40 pmBaltimore/Washington
Jan 30
BWI8:35 pmBaltimore/Washington
17h 40m
1 stop
OPO7:15 pmPorto
$850

United Airlines flights from Porto to Baltimore

Our best United Airlines deals on Porto to Baltimore flight tickets
United Airlines
Sep 25
OPO6:00 amPorto
23h 38m
2 stops
BWI12:38 amBaltimore/Washington
Sep 30
BWI6:17 amBaltimore/Washington
19h 43m
2 stops
OPO7:00 amPorto
$706
United Airlines
Oct 1
OPO12:10 pmPorto
17h 28m
2 stops
BWI12:38 amBaltimore/Washington
Nov 5
BWI10:45 amBaltimore/Washington
17h 45m
2 stops
OPO9:30 amPorto
$736
United Airlines
Jun 9
OPO12:35 pmPorto
16h 58m
2 stops
BWI12:33 amBaltimore/Washington
Jun 16
BWI6:20 amBaltimore/Washington
18h 55m
2 stops
OPO6:15 amPorto
$766

momondo Fare Finder

 
Customize your flight search to find flights from Porto to Baltimore 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 15, 2026.
Use the filters below to find and compare flights from Porto to Baltimore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Fri 9/25

6:00 am-12:38 am

2 stops23h 38m

Baltimore/Washington

Wed 9/30

6:17 am-7:00 am

2 stops19h 43m

$706

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Wed 10/14

11:45 am-10:10 pm

2 stops15h 25m

Baltimore/Washington

Wed 10/21

12:15 pm-10:30 am

2 stops17h 15m

$719

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 10/1

12:10 pm-12:38 am

2 stops17h 28m

Baltimore/Washington

Thu 11/5

10:45 am-9:30 am

2 stops17h 45m

$736

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Tue 6/9

12:35 pm-12:33 am

2 stops16h 58m

Baltimore/Washington

Tue 6/16

6:20 am-6:15 am

2 stops18h 55m

$766

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Tue 6/16

8:55 pm-7:40 pm

1 stop27h 45m

Baltimore/Washington

Sun 6/21

9:35 pm-8:35 pm

1 stop18h 00m

$788

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 7/16

5:55 am-5:42 pm

2 stops16h 47m

Baltimore/Washington

Tue 7/28

11:52 am-10:30 am

2 stops17h 38m

$827
Quickest round-trip

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Wed 5/27

6:00 am-5:33 pm

2 stops16h 33m

Baltimore/Washington

Sat 5/30

10:44 am-6:55 am

2 stops15h 11m

$830

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 7/9

9:55 am-7:40 pm

1 stop14h 45m

Baltimore/Washington

Sun 7/12

9:35 pm-8:35 pm

1 stop18h 00m

$841

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Mon 5/25

9:25 pm-7:40 pm

1 stop27h 15m

Baltimore/Washington

Sat 1/30

8:35 pm-7:15 pm

1 stop17h 40m

$850

PortoBaltimore

OPO - BWI

OPOBWI

Porto

Thu 7/16

9:55 am-7:40 pm

1 stop14h 45m

Baltimore/Washington

Tue 7/28

9:30 pm-7:30 pm

1 stop17h 00m

$853

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 Washington, D.C. from

How to get the cheapest flight ticket from Porto to Baltimore

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

Can stopping save me money on Porto to Baltimore flights?

You could potentially save up to 9% on your flight if you consider stops on a Porto to Baltimore flight.

When to book flights from Porto to Baltimore

Are you open to changing your travel dates? Check out the ideal times to fly from Porto to Baltimore according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Porto to Baltimore (OPO to BWI) flight deals and tips

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

Fastest flight time

16h 45m

Direct flights

None
The fastest flight from Porto to Baltimore takes 16h 45m
There are no direct flights from Porto to Baltimore. There are no popular flight routes from Porto to Baltimore.
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Frequently asked questions about flying from Porto to Baltimore

  • How far is Porto to Baltimore/Washington by plane?

    The straight-line distance from Porto to Baltimore/Washington is 3491.2 mi. By plane, this route typically takes 16h 45m.

  • When did momondo last update prices for flights from Porto Airport to Baltimore/Washington Airport?

    Prices for flights from Porto Airport to Baltimore/Washington Airport are updated daily.

  • How old do you have to be to fly from Porto Airport to Baltimore/Washington Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Porto Airport to Baltimore/Washington Airport.

  • What documentation or ID do you need to fly to Baltimore/Washington Airport?

    The required travel and health documents for your Baltimore/Washington Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Baltimore/Washington Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Baltimore from Porto.

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

momondo does allow users to show only those flights to Baltimore from Porto which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to Baltimore from Porto. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to Baltimore, momondo offers a useful price alert feature which will track prices for flights to Baltimore from Porto and alert you when they change.

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