BWI - OPO

$317 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 3/20. 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
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41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$588
Delta
Mon 3/23Wed 4/1
BWI - OPO • 2 stops
Cheapest one-way
$317
Multiple Airlines
Fri 3/20
BWI - OPO • 3 stops
Top airlines
Delta
Cheapest • from $588 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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We hope you love your trip to Porto!
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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

Mon, Mar 23 - Wed, Apr 1
Delta Logo
11:45 am - 10:30 am
BWI
-
OPO
18h 45m
2 stops
Delta Logo
5:00 am - 7:19 pm
OPO
-
BWI
19h 19m
2 stops
$588Delta
Tue, Feb 24 - Tue, Mar 3
Delta Logo
11:45 am - 10:30 am
BWI
-
OPO
17h 45m
2 stops
Delta Logo
5:00 am - 4:38 pm
OPO
-
BWI
16h 38m
2 stops
$589Delta
Mon, Mar 23 - Mon, Mar 30
Delta Logo
5:40 am - 10:30 am
BWI
-
OPO
24h 50m
2 stops
Delta Logo
11:25 am - 10:13 am
OPO
-
BWI
51h 48m
2 stops
$595Delta
Tue, Apr 14 - Thu, Apr 30
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
$625British Airways
Tue, Mar 24 - Wed, Apr 1
Delta Logo
5:40 am - 10:30 am
BWI
-
OPO
24h 50m
2 stops
Delta Logo
5:00 am - 7:19 pm
OPO
-
BWI
19h 19m
2 stops
$626Delta
Wed, Mar 18 - Mon, Mar 23
British Airways Logo
9:35 pm - 4:45 pm
BWI
-
OPO
15h 10m
1 stop
British Airways Logo
5:30 pm - 7:45 pm
OPO
-
BWI
30h 15m
1 stop
$627British Airways
Sun, Mar 15 - Mon, Mar 23
British Airways Logo
9:35 pm - 4:40 pm
BWI
-
OPO
15h 05m
1 stop
British Airways Logo
5:30 pm - 7:45 pm
OPO
-
BWI
30h 15m
1 stop
$628British Airways
Tue, Mar 24 - Wed, Apr 1
British Airways Logo
9:35 pm - 5:45 pm
BWI
-
OPO
16h 10m
1 stop
British Airways Logo
8:20 pm - 7:40 pm
OPO
-
BWI
28h 20m
1 stop
$630British Airways
Tue, Mar 24 - Mon, Mar 30
Delta Logo
5:40 am - 10:30 am
BWI
-
OPO
24h 50m
2 stops
Delta Logo
11:25 am - 10:13 am
OPO
-
BWI
51h 48m
2 stops
$633Delta
Tue, Apr 14 - Thu, Apr 30
Multiple Airlines Logo
9:30 pm - 8:00 pm
BWI
-
OPO
17h 30m
2 stops
Multiple Airlines Logo
9:55 am - 7:40 pm
OPO
-
BWI
14h 45m
1 stop
$634Multiple Airlines
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.

Which airlines provide the cheapest flights from Baltimore to Porto?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Baltimore to Porto were found on Delta ($588) and British Airways ($625).

Find deals

Good to know

Low seasonNovember
Cheapest flight$317
Best time to beat the crowds with an average 37% drop in price.
Most popular time to fly and prices are also 13% 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 $317 for a one-way ticket and $588 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 8123 reviews
7.2Food
8.1Boarding
7.8Entertainment
8.5Crew
7.9Comfort
Airline reviews

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

10.0 ExcellentZebrina, Jan 2026
LGA - CAE
Read more Delta reviews

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The flight was comfortable and uneventful, which is what I desire

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

My flight out of Baton Rouge to Atlanta was delayed by a half hour. This got us into Atlanta airport 30 minutes late. I ran through the airport to get to my connecting flight. As I approached the boarding gate, I saw the boarding door was still open and a passenger was being checked in. But when I got to the gate, the boarding agent told me they had already given away my seat and there were no empty seats on that flight. So I had to take a later flight. That has never happened to me before. Very frustrating.

Connection through Atlanta was difficult. Mechanical issue on plane caused a two hour delay. New gate was a mile away.

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

Information on your arrival and departure airports

Baltimore (BWI)
Porto (OPO)