BWI - OPO

$254 Find Cheap Flights from Baltimore to Porto

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Baltimore to Porto departing on 4/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Baltimore to Porto, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Baltimore to Porto, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$577
Typical prices: $780-$1,778
Multiple Airlines
Tue 4/14Tue 4/21
BWI - OPO • 3 stops
Cheapest one-way
$254
Multiple Airlines
Fri 4/17
BWI - OPO • 3 stops
Top airlines
Delta
Cheapest • from $608 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Baltimore and Porto. You'll need at least 1 connection.
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Baltimore to Porto (BWI-OPO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Baltimore to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Baltimore to Porto

Tue, Apr 14 - Tue, Apr 21
Multiple Airlines Logo
8:30 pm - 11:00 am
BWI
-
OPO
33h 30m
3 stops
Multiple Airlines Logo
7:10 am - 7:25 pm
OPO
-
BWI
17h 15m
2 stops
$577Multiple Airlines
Tue, Apr 7 - Wed, Apr 15
Delta Logo
3:35 pm - 3:25 pm
BWI
-
OPO
18h 50m
2 stops
Delta Logo
5:00 am - 6:17 pm
OPO
-
BWI
18h 17m
2 stops
$608Delta
Wed, Aug 19 - Thu, Aug 27
United Airlines Logo
12:30 pm - 6:55 am
BWI
-
OPO
13h 25m
2 stops
United Airlines Logo
12:35 pm - 9:34 am
OPO
-
BWI
25h 59m
2 stops
$616United Airlines
Tue, Apr 14 - Tue, Apr 21
American Airlines Logo
10:55 am - 7:40 am
BWI
-
OPO
15h 45m
2 stops
American Airlines Logo
8:20 am - 7:22 pm
OPO
-
BWI
16h 02m
2 stops
$617American Airlines
Mon, Aug 17 - Wed, Aug 26
United Airlines Logo
6:15 am - 7:00 am
BWI
-
OPO
19h 45m
2 stops
United Airlines Logo
2:25 pm - 5:29 pm
OPO
-
BWI
32h 04m
2 stops
$623United Airlines
Mon, Aug 10 - Thu, Aug 20
British Airways Logo
9:30 pm - 7:50 pm
BWI
-
OPO
17h 20m
1 stop
British Airways Logo
9:55 am - 7:40 pm
OPO
-
BWI
14h 45m
1 stop
$631British Airways
Tue, Mar 31 - Wed, Apr 15
Delta Logo
3:35 pm - 10:55 am
BWI
-
OPO
14h 20m
2 stops
Delta Logo
5:00 am - 7:16 pm
OPO
-
BWI
19h 16m
2 stops
$643Delta
Tue, Apr 7 - Thu, Apr 23
British Airways Logo
9:30 pm - 7:30 pm
BWI
-
OPO
17h 00m
1 stop
British Airways Logo
9:55 am - 7:40 pm
OPO
-
BWI
14h 45m
1 stop
$651British Airways
Tue, Apr 7 - Tue, Apr 21
Delta Logo
3:35 pm - 3:25 pm
BWI
-
OPO
18h 50m
2 stops
Delta Logo
5:00 am - 6:17 pm
OPO
-
BWI
18h 17m
2 stops
$660Delta
Tue, Aug 11 - Thu, Aug 20
British Airways Logo
7:25 pm - 7:30 pm
BWI
-
OPO
19h 05m
1 stop
British Airways Logo
9:55 am - 7:40 pm
OPO
-
BWI
14h 45m
1 stop
$661British Airways
Booking Insights

KAYAK's insights & trends for Baltimore to Porto flights

Get data-powered insights and trends into flights from Baltimore to Porto to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Baltimore to Porto?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Baltimore to Porto departing in April.

Good to know

Low seasonNovember
Cheapest flight$254
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Baltimore to Porto

When to book flights from Baltimore to Porto

Are your dates flexible? Find out the best times to travel from Baltimore to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Baltimore to Porto

  • What is the cheapest flight from Baltimore to Porto?

    In the last 3 days, the lowest price for a flight from Baltimore to Porto was $254 for a one-way ticket and $577 for a round-trip.

  • Do I need a passport to fly between Baltimore and Porto?

    A passport is required to fly from Baltimore to Porto.

  • Which airports will I be using when flying from Baltimore to Porto?

    When flying out of Baltimore you will be using Baltimore/Washington. You will be landing at Porto, also known as Porto.

  • Which aircraft models fly most regularly from Baltimore to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Baltimore to Porto?

    SkyTeam is the only airline alliance operating flights between Baltimore and Porto.

  • How does KAYAK find such low prices on flights from Baltimore to Porto?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Baltimore to Porto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Baltimore to Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Baltimore is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Baltimore to Porto?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to Baltimore with another airline. Booking your flights between Baltimore and OPO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Baltimore to Porto?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from Baltimore up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Baltimore to Porto

 
See real verified KAYAK customer reviews for airlines flying from Baltimore to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Baltimore to Porto? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8237 reviews
7.2Food
7.9Comfort
7.8Entertainment
8.5Crew
8.1Boarding
Airline reviews

I was happy that I was able to get a last minute flight but unfortunately my seat was a middle seat. Even with Delta Comfort I wasn't comfortable

8.0 ExcellentSheila, Mar 2026
ATL - EWR
Read more Delta reviews

I was happy that I was able to get a last minute flight but unfortunately my seat was a middle seat. Even with Delta Comfort I wasn't comfortable

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

Flight was warm for first few hours and quite rough

Seat was extremely hard which made even a short 1 hour 20 minute flight fairly uncomfortable.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The staff was fine. The plane was extremely tight, and I paid for the wifi and it did not work at all. I was actually going to ask for a refund.

two hour delay and the Delta representative on the PA system was unable to understand

An awesome flight crew. FC seat cushion just doesn’t cut it for a 3+ hour flight.

2+hrs delay without any reason provided and a cramped flight

We waited an hour on the runway to get a gate in Orlando

Everything you need to know for your flight from Baltimore to Porto

Information on your arrival and departure airports