BWI - OPO

$289 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 4/13. 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
$637
Multiple Airlines
Mon 5/4Thu 5/14
BWI - OPO • 2 stops
Cheapest one-way
$289
Multiple Airlines
Mon 4/13
BWI - OPO • 3 stops
Top airlines
Delta
Cheapest • from $707 (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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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

Mon, May 4 - Thu, May 14
Multiple Airlines Logo
7:30 am - 8:25 pm
BWI
-
OPO
31h 55m
2 stops
Multiple Airlines Logo
5:05 am - 7:11 am
OPO
-
BWI
31h 06m
2 stops
$637Multiple Airlines
Sat, Aug 8 - Wed, Aug 19
United Airlines Logo
6:20 pm - 6:55 am
BWI
-
OPO
31h 35m
2 stops
United Airlines Logo
2:25 pm - 9:28 pm
OPO
-
BWI
36h 03m
2 stops
$706United 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 - 4:49 pm
OPO
-
BWI
16h 49m
2 stops
$707Delta
Tue, Apr 21 - Tue, Apr 28
Delta Logo
7:22 pm - 3:30 pm
BWI
-
OPO
15h 08m
2 stops
Delta Logo
5:00 am - 4:49 pm
OPO
-
BWI
16h 49m
2 stops
$712Delta
Mon, Aug 10 - Thu, Aug 20
United Airlines Logo
8:25 am - 6:55 am
BWI
-
OPO
17h 30m
2 stops
United Airlines Logo
9:00 am - 9:28 pm
OPO
-
BWI
17h 28m
2 stops
$715United Airlines
Thu, Apr 30 - Sun, May 3
Multiple Airlines Logo
8:30 pm - 8:25 pm
BWI
-
OPO
18h 55m
2 stops
Multiple Airlines Logo
9:15 pm - 7:25 pm
OPO
-
BWI
27h 10m
3 stops
$728Multiple Airlines
Sat, Aug 8 - Wed, Aug 19
United Airlines Logo
6:20 pm - 6:55 am
BWI
-
OPO
31h 35m
2 stops
United Airlines Logo
2:25 pm - 9:34 am
OPO
-
BWI
48h 09m
2 stops
$735United Airlines
Tue, May 5 - Fri, May 15
Delta Logo
3:33 pm - 3:25 pm
BWI
-
OPO
18h 52m
2 stops
Delta Logo
5:00 am - 11:17 pm
OPO
-
BWI
23h 17m
2 stops
$737Delta
Thu, Apr 9 - Thu, Apr 16
Multiple Airlines Logo
11:20 pm - 8:25 pm
BWI
-
OPO
16h 05m
2 stops
Multiple Airlines Logo
10:00 pm - 7:25 pm
OPO
-
BWI
26h 25m
3 stops
$741Multiple Airlines
Tue, Apr 14 - Tue, Apr 28
British Airways Logo
9:30 pm - 7:30 pm
BWI
-
OPO
17h 00m
1 stop
British Airways Logo
8:55 pm - 7:40 pm
OPO
-
BWI
27h 45m
1 stop
$745British 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.

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 ($707) and British Airways ($745).

Find deals

Good to know

Cheapest flight$289
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 $289 for a one-way ticket and $637 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 8293 reviews
7.2Food
8.5Crew
8.1Boarding
7.9Comfort
7.8Entertainment
Airline reviews

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

2.0 MediocreSusan, Mar 2026
JAX - ATL
Read more Delta reviews

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

With Aeromexico it ended up good but with Delta it was bad because we did everything through Delta... Showed up at the Delta terminal... It was the wrong place! Nothing ever told us to go to the Aeromexico terminal. It said "in partnership with Aeromexico" but I was never instructed to check in with them or go to their terminal. We had to haul @$$ running through the airport and almost didn't make it thanks to this poor communication. 👎🏽

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Extremely disappointed with Delta. They canceled flight last minute and then I rebooked the other flights and with which were delayed as well

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

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

Information on your arrival and departure airports

Baltimore (BWI)
Porto (OPO)