BWI - OPO

$250 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 4/8. 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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Everything you should know

Cheapest round-trip
$557
Delta
Tue 4/7Wed 4/15
BWI - OPO • 2 stops
Cheapest one-way
$250
American Airlines
Wed 4/8
BWI - OPO • 2 stops
Top airlines
Delta
Cheapest • from $557 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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

Tue, Apr 7 - Wed, Apr 15
Delta Logo
3:35 pm - 3:25 pm
BWI
-
OPO
18h 50m2 stops
Delta Logo
5:00 am - 5:54 pm
OPO
-
BWI
17h 54m2 stops
$557Delta
Tue, Apr 21 - Wed, Apr 29
British Airways Logo
9:30 pm - 9:05 am
BWI
-
OPO
30h 35m1 stop
British Airways Logo
8:20 pm - 7:40 pm
OPO
-
BWI
28h 20m1 stop
$585British Airways
Wed, Feb 18 - Wed, Feb 25
Delta Logo
1:01 pm - 10:30 am
BWI
-
OPO
16h 29m2 stops
Delta Logo
5:00 am - 4:38 pm
OPO
-
BWI
16h 38m2 stops
$588Delta
Tue, Feb 10 - Wed, Feb 18
KLM Logo
6:59 pm - 3:25 pm
BWI
-
OPO
15h 26m2 stops
KLM Logo
5:00 am - 4:38 pm
OPO
-
BWI
16h 38m2 stops
$594KLM
Wed, Jan 28 - Wed, Feb 4
KLM Logo
6:59 pm - 3:25 pm
BWI
-
OPO
15h 26m2 stops
KLM Logo
5:00 am - 4:38 pm
OPO
-
BWI
16h 38m2 stops
$621KLM
Tue, Apr 21 - Wed, Apr 29
American Airlines Logo
10:55 am - 7:40 am
BWI
-
OPO
15h 45m2 stops
American Airlines Logo
8:20 am - 7:19 pm
OPO
-
BWI
15h 59m2 stops
$631American Airlines
Mon, Feb 16 - Mon, Feb 23
Delta Logo
11:45 am - 10:30 am
BWI
-
OPO
17h 45m2 stops
Delta Logo
11:15 am - 12:35 am
OPO
-
BWI
18h 20m2 stops
$638Delta
Wed, Mar 25 - Wed, Apr 8
Delta Logo
10:54 am - 10:30 am
BWI
-
OPO
19h 36m2 stops
Delta Logo
5:00 am - 8:27 pm
OPO
-
BWI
20h 27m2 stops
$647Delta
Sun, Jan 18 - Wed, Jan 28
Multiple Airlines Logo
7:40 pm - 10:55 pm
BWI
-
OPO
22h 15m2 stops
Multiple Airlines Logo
9:55 pm - 11:47 pm
OPO
-
BWI
30h 52m3 stops
$653Multiple Airlines
Sat, Apr 18 - Sat, May 9
British Airways Logo
9:30 pm - 8:35 pm
BWI
-
OPO
18h 05m1 stop
British Airways Logo
10:40 am - 7:40 pm
OPO
-
BWI
14h 00m1 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.

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 ($557) and Air France ($594).

Which airlines fly non-stop between Baltimore and Porto?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Baltimore to Porto.

There is just one airline that flies from Baltimore to Porto direct and that is Delta. The best round-trip deal found from Delta for the route is $529.

Find deals

Good to know

Low seasonNovember
Cheapest flight$250
Best time to beat the crowds with an average 37% drop in price.
Most popular time to fly and prices are also 12% 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 $250 for a one-way ticket and $557 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 8013 reviews
7.2Food
7.8Entertainment
8.1Boarding
7.9Comfort
8.5Crew
Airline reviews

A 12 hour flight during the day with one real meal service - are you kidding? Also the breakfast was one of the worst and not what was listed

4.0 OkayAvik, Dec 2025
SEA - ICN
Read more Delta reviews

A 12 hour flight during the day with one real meal service - are you kidding? Also the breakfast was one of the worst and not what was listed

Flight was delayed several times. At one point, they "pulled back" 15 minutes from the delayed boarding and sent a text saying we would board sooner than previously advised. The flight then was delayed again. And when we boarded, there was an unspecified technical issue which had us waiting in the plane for about an hour.

Delta is a good airline. I've never had an issue with Delta. I'll continue to fly with them until they show me that I shouldn't.

The only thing nice I can say is the flight crew was really nice and apologetic about the situation. They shared as much information as they had and advised us on what we could do about missing connecting flights. The boarding process was so slow. The gate agent was working by herself and should have had someone working with her. It took almost an hour to board because she was trying to board a full flight of people and provide customer service to everyone who was flying standby and/or had questions. It was really chaotic. This didn't help the fact that we were delayed and folks were missing connections the longer it took.

The gate attendants and the crew were terrible. Because of high winds, they needed to carry more fuel, so they had to get volunteers to take the next flight at 6 am the next day. They did a terrible job of it - our flight ended up taking off just under 3 hours of the scheduled time. I hope to never fly Delta again.

Did not realize internet screen was hidden between seats and no info printed!!!!

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Very good flight crew and very nice people staff were incredible especially the gate agent

Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.

The flight was delayed for about 2 hrs. Other than it, it was good.

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

Information on your arrival and departure airports

Baltimore (BWI)
Porto (OPO)