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Cheap flights from Baltimore to Porto from $306

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Baltimore to Porto departing on 10/11. 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

Find the cheapest flights from Baltimore to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:30 pm - 8:00 amBWI  Baltimore/Washington-OPO Porto
30h 30m3 stops Reykjavik Keflavik Intl Milan Malpensa Lisbon Humberto Delgado
Multiple Airlines Logo
6:30 am - 10:15 pmOPO  Porto-BWI Baltimore/Washington
20h 45m2 stops Milan Malpensa Reykjavik Keflavik Intl
$672Multiple Airlines
Mon, Oct 5 - Tue, Oct 13
Multiple Airlines Logo
8:30 pm - 11:55 pmBWI  Baltimore/Washington-OPO Porto
22h 25m2 stops Reykjavik Keflavik Intl Milan Malpensa
Multiple Airlines Logo
6:30 am - 10:15 pmOPO  Porto-BWI Baltimore/Washington
20h 45m2 stops Milan Malpensa Reykjavik Keflavik Intl
$681Multiple Airlines
Mon, Oct 5 - Tue, Oct 13
Multiple Airlines Logo
8:30 pm - 12:40 amBWI  Baltimore/Washington-OPO Porto
23h 10m3 stops Reykjavik Keflavik Intl Milan Malpensa Lisbon Humberto Delgado
Multiple Airlines Logo
5:05 am - 10:15 pmOPO  Porto-BWI Baltimore/Washington
22h 10m3 stops Lisbon Humberto Delgado Milan Malpensa Reykjavik Keflavik Intl
$733Multiple Airlines
Mon, Oct 5 - Tue, Oct 13
United Airlines Logo
6:10 am - 9:30 amBWI  Baltimore/Washington-OPO Porto
22h 20m2 stops Chicago O'Hare Intl Newark
United Airlines Logo
12:35 pm - 10:29 amOPO  Porto-BWI Baltimore/Washington
26h 54m2 stops Frankfurt am Main Chicago O'Hare Intl
$746United Airlines
Tue, Nov 10 - Wed, Nov 18
Delta Logo
12:00 pm - 10:35 amBWI  Baltimore/Washington-OPO Porto
17h 35m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle
Delta Logo
5:00 am - 7:17 pmOPO  Porto-BWI Baltimore/Washington
19h 17m2 stops Amsterdam Schiphol Boston Logan Intl
$747Delta
Tue, Dec 8 - Wed, Dec 16
Multiple Airlines Logo
8:30 pm - 8:00 amBWI  Baltimore/Washington-OPO Porto
30h 30m3 stops Reykjavik Keflavik Intl Brussels Bruxelles-National Barcelona-El Prat
Multiple Airlines Logo
10:00 pm - 7:25 pmOPO  Porto-BWI Baltimore/Washington
26h 25m3 stops Barcelona-El Prat Brussels Bruxelles-National Reykjavik Keflavik Intl
$748Multiple Airlines
Wed, Sep 23 - Tue, Sep 29
Multiple Airlines Logo
7:40 pm - 3:25 pmBWI  Baltimore/Washington-OPO Porto
14h 45m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol
Multiple Airlines Logo
5:55 am - 4:49 pmOPO  Porto-BWI Baltimore/Washington
15h 54m2 stops Paris Charles de Gaulle Detroit Metropolitan Wayne County
$759Multiple Airlines
Tue, Nov 10 - Tue, Nov 17
United Airlines Logo
5:31 pm - 9:30 amBWI  Baltimore/Washington-OPO Porto
34h 59m2 stops Chicago O'Hare Intl Newark
United Airlines Logo
6:00 am - 10:29 amOPO  Porto-BWI Baltimore/Washington
33h 29m2 stops Frankfurt am Main Chicago O'Hare Intl
$762United Airlines
Sat, Nov 14 - Tue, Nov 24
Multiple Airlines Logo
11:20 pm - 10:55 pmBWI  Baltimore/Washington-OPO Porto
18h 35m2 stops Reykjavik Keflavik Intl London Gatwick
Multiple Airlines Logo
9:45 pm - 6:40 pmOPO  Porto-BWI Baltimore/Washington
25h 55m2 stops Dublin Reykjavik Keflavik Intl
$775Multiple Airlines
Tue, Oct 13 - Fri, Nov 6
United Airlines Logo
10:10 am - 9:30 amBWI  Baltimore/Washington-OPO Porto
18h 20m2 stops Chicago O'Hare Intl Newark
United Airlines Logo
6:00 am - 6:54 pmOPO  Porto-BWI Baltimore/Washington
17h 54m2 stops Frankfurt am Main Chicago O'Hare Intl
$776United Airlines
Sun, Nov 22 - Fri, Nov 27

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United Airlines flights from Baltimore to Porto

Our best United Airlines deals on Baltimore to Porto flight tickets
United Airlines
Nov 10
BWI6:10 amBaltimore/Washington
22h 20m
2 stops
OPO9:30 amPorto
Nov 18
OPO12:35 pmPorto
26h 54m
2 stops
BWI10:29 amBaltimore/Washington
$746
United Airlines
Nov 14
BWI5:31 pmBaltimore/Washington
34h 59m
2 stops
OPO9:30 amPorto
Nov 24
OPO6:00 amPorto
33h 29m
2 stops
BWI10:29 amBaltimore/Washington
$762
United Airlines
Nov 22
BWI10:10 amBaltimore/Washington
18h 20m
2 stops
OPO9:30 amPorto
Nov 27
OPO6:00 amPorto
17h 54m
2 stops
BWI6:54 pmBaltimore/Washington
$776

Delta flights from Baltimore to Porto

Our best Delta deals on Baltimore to Porto flight tickets
Delta
Dec 8
BWI12:00 pmBaltimore/Washington
17h 35m
2 stops
OPO10:35 amPorto
Dec 16
OPO5:00 amPorto
19h 17m
2 stops
BWI7:17 pmBaltimore/Washington
$747
Delta
Nov 9
BWI1:50 pmBaltimore/Washington
15h 45m
2 stops
OPO10:35 amPorto
Nov 17
OPO5:00 amPorto
17h 56m
2 stops
BWI5:56 pmBaltimore/Washington
$807
Delta
Oct 14
BWI2:11 pmBaltimore/Washington
20h 14m
2 stops
OPO3:25 pmPorto
Oct 21
OPO5:00 amPorto
16h 51m
2 stops
BWI4:51 pmBaltimore/Washington
$837

momondo Fare Finder

 
Customize your flight search to find flights from Baltimore 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 August 14, 2026.
Use the filters below to find and compare flights from Baltimore to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimorePorto

BWI Baltimore/Washington - OPO Porto

BWIOPO

Baltimore/Washington

Mon 10/5

8:30 pm-8:00 am

3 stops30h 30m

Porto

Tue 10/13

6:30 am-10:15 pm

2 stops20h 45m

$672

BaltimorePorto

BWI Baltimore/Washington - OPO Porto

BWIOPO

Baltimore/Washington

Mon 10/5

8:30 pm-11:55 pm

2 stops22h 25m

Porto

Tue 10/13

6:30 am-10:15 pm

2 stops20h 45m

$681

BaltimorePorto

BWI Baltimore/Washington - OPO Porto

BWIOPO

Baltimore/Washington

Mon 10/5

8:30 pm-12:40 am

3 stops23h 10m

Porto

Tue 10/13

5:05 am-10:15 pm

3 stops22h 10m

$733

BaltimorePorto

BWI Baltimore/Washington - OPO Porto

BWIOPO

Baltimore/Washington

Tue 11/10

6:10 am-9:30 am

2 stops22h 20m

Porto

Wed 11/18

12:35 pm-10:29 am

2 stops26h 54m

$746

BaltimorePorto

BWI Baltimore/Washington - OPO Porto

BWIOPO

Baltimore/Washington

Tue 12/8

12:00 pm-10:35 am

2 stops17h 35m

Porto

Wed 12/16

5:00 am-7:17 pm

2 stops19h 17m

$747

BaltimorePorto

BWI Baltimore/Washington - OPO Porto

BWIOPO

Baltimore/Washington

Wed 9/23

8:30 pm-8:00 am

3 stops30h 30m

Porto

Tue 9/29

10:00 pm-7:25 pm

3 stops26h 25m

$748
Quickest round-trip

BaltimorePorto

BWI Baltimore/Washington - OPO Porto

BWIOPO

Baltimore/Washington

Tue 11/10

7:40 pm-3:25 pm

2 stops14h 45m

Porto

Tue 11/17

5:55 am-4:49 pm

2 stops15h 54m

$759

BaltimorePorto

BWI Baltimore/Washington - OPO Porto

BWIOPO

Baltimore/Washington

Sat 11/14

5:31 pm-9:30 am

2 stops34h 59m

Porto

Tue 11/24

6:00 am-10:29 am

2 stops33h 29m

$762

BaltimorePorto

BWI Baltimore/Washington - OPO Porto

BWIOPO

Baltimore/Washington

Tue 10/13

11:20 pm-10:55 pm

2 stops18h 35m

Porto

Fri 11/6

9:45 pm-6:40 pm

2 stops25h 55m

$775

BaltimorePorto

BWI Baltimore/Washington - OPO Porto

BWIOPO

Baltimore/Washington

Sun 11/22

10:10 am-9:30 am

2 stops18h 20m

Porto

Fri 11/27

6:00 am-6:54 pm

2 stops17h 54m

$776

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Baltimore to Porto

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Can stopping save me money on Baltimore to Porto flights?

You could potentially save up to 11% on your flight if you consider stops on a Baltimore to Porto flight.

When to book flights from Baltimore to Porto

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

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

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

Fastest flight time

15h 58m

Direct flights

None
The fastest flight from Baltimore to Porto takes 15h 58m
There are no direct flights from Baltimore to Porto. There are no popular flight routes from Baltimore to Porto.
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Frequently asked questions about flying from Baltimore to Porto

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

    The distance between Baltimore/Washington and Porto is about 3491.2 mi. Flights usually cover this in 15h 58m, depending on flying conditions and air traffic around both airports.

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

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

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

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

    The required travel and health documents for your Porto 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 Porto Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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
Pinhao
Esposende
Chaves
Arcos de Valdevez
Viseu
Guimarães
Espinho
Lamego
Ponte de Lima
Mesao Frio
Penafiel
Caminha
Baiao

Why use momondo?

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

It is quick and easy to find Baltimore to Porto flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Porto that suits you.

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

All flight searches from Baltimore to Porto on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Baltimore to Porto flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

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

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