BWI - OPO

$270 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 8/5. 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
$587
Multiple Airlines
Tue 4/14Tue 4/21
BWI - OPO • 3 stops
Cheapest one-way
$270
United Airlines
Wed 8/5
BWI - OPO • 2 stops
Top airlines
American Airlines
Cheapest • from $597 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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 - 12:40 am
BWI
-
OPO
23h 10m
3 stops
Multiple Airlines Logo
7:10 am - 7:25 pm
OPO
-
BWI
17h 15m
2 stops
$587Multiple 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
$597American Airlines
Tue, Mar 24 - Wed, Apr 1
Delta Logo
10:54 am - 10:30 am
BWI
-
OPO
19h 36m
2 stops
Delta Logo
5:00 am - 11:59 pm
OPO
-
BWI
23h 59m
2 stops
$616Delta
Mon, Mar 16 - Fri, Apr 10
Delta Logo
3:35 pm - 3:25 pm
BWI
-
OPO
19h 50m
2 stops
Delta Logo
5:00 am - 11:59 pm
OPO
-
BWI
23h 59m
2 stops
$625Delta
Tue, Apr 14 - Tue, Apr 21
British Airways Logo
9:30 pm - 7:30 pm
BWI
-
OPO
17h 00m
1 stop
British Airways Logo
8:40 pm - 7:40 pm
OPO
-
BWI
28h 00m
1 stop
$630British Airways
Tue, Apr 14 - Tue, Apr 21
British Airways Logo
10:55 am - 7:30 pm
BWI
-
OPO
27h 35m
2 stops
British Airways Logo
8:40 pm - 7:40 pm
OPO
-
BWI
28h 00m
1 stop
$632British Airways
Tue, Apr 7 - Wed, Apr 15
American Airlines Logo
10:55 am - 7:40 am
BWI
-
OPO
15h 45m
2 stops
American Airlines Logo
8:20 am - 7:39 pm
OPO
-
BWI
16h 19m
2 stops
$648American Airlines
Tue, Apr 7 - Wed, Apr 15
American Airlines Logo
10:55 am - 7:40 am
BWI
-
OPO
15h 45m
2 stops
American Airlines Logo
8:20 am - 7:39 pm
OPO
-
BWI
16h 19m
2 stops
$649American Airlines
Wed, Apr 22 - Tue, Apr 28
Multiple Airlines Logo
8:30 pm - 9:10 am
BWI
-
OPO
31h 40m
3 stops
Multiple Airlines Logo
7:10 am - 7:25 pm
OPO
-
BWI
17h 15m
2 stops
$650Multiple Airlines
Tue, Mar 24 - Tue, Apr 7
Delta Logo
10:54 am - 10:30 am
BWI
-
OPO
19h 36m
2 stops
Delta Logo
6:15 am - 11:01 pm
OPO
-
BWI
21h 46m
2 stops
$653Delta
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 American Airlines ($597) and Delta ($616).

Find deals

Good to know

Low seasonNovember
Cheapest flight$270
Best time to beat the crowds with an average 32% 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 $270 for a one-way ticket and $587 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 8203 reviews
8.5Crew
7.8Entertainment
8.1Boarding
7.9Comfort
7.2Food
Airline reviews

Flight was delayed and no reasons provided. After the passengers were boarded, the crew made announcement that the captain has jot arrived and he would take another 15 mins. All passengers patiently sat until the captain came and started. Terrible experience!

2.0 MediocreMansoor, Feb 2026
DTW - RIC
Read more Delta reviews

Flight was delayed and no reasons provided. After the passengers were boarded, the crew made announcement that the captain has jot arrived and he would take another 15 mins. All passengers patiently sat until the captain came and started. Terrible experience!

Flight was delayed. No information on why it was delayed. After we boarded the flight, , the crew made announcement that the captain hs not arrived and he will take 15 mins more to arrive. Passengers were just sitting patiently for the captain to arrive and start, Terrible experience.

Totally worth the miles to upgrade to Delta Comfort. Plenty of legroom.

This was my first time flying Delta ever and I had a great experience!

Smallest leg room I've ever had on a plane.

They took all carry-on luggage from Groups 6 -9 - I was group 5 and waiting in line to board - they made me check my luggage too. That then went to baggage claim and delayed departure from the airport. There was overhead room in my seating area - Delta over reacted. Also, had a gentleman next to me that took up 1/2 my seat.

Excellent!!! Aeromexico is a great airline. What was not that good is the service provided by Kayak. It is never clear and not easy to manage.

Flight delay was frustrating, also you cannot checkin online without delta app, web browser check-in throw errors

The gate agent was most helpful in getting me on to fly standby. I greatly appreciate it.

bulkhead seat had very little legroom - even in bsiness class.

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

Information on your arrival and departure airports

Baltimore (BWI)
Porto (OPO)