BWI - OPO

$221 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 4/26. 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
$492
United Airlines
Wed 2/25Wed 3/4
BWI - OPO • 2 stops
Cheapest one-way
$221
British Airways
Sun 4/26
BWI - OPO • 1 stop
Top airlines
Delta
Cheapest • from $497 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
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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

Wed, Feb 25 - Wed, Mar 4
United Airlines Logo
10:30 am - 9:30 am
BWI
-
OPO
18h 00m
2 stops
United Airlines Logo
6:00 am - 9:17 pm
OPO
-
BWI
20h 17m
2 stops
$492United Airlines
Wed, Apr 22 - Tue, Apr 28
United Airlines Logo
6:05 am - 9:45 am
BWI
-
OPO
22h 40m
2 stops
United Airlines Logo
6:00 am - 9:23 pm
OPO
-
BWI
20h 23m
3 stops
$496United Airlines
Wed, Jan 28 - Wed, May 6
Delta Logo
10:54 am - 10:30 am
BWI
-
OPO
18h 36m
2 stops
Delta Logo
5:00 am - 11:02 pm
OPO
-
BWI
23h 02m
2 stops
$497Delta
Tue, Mar 10 - Tue, Mar 17
Delta Logo
3:35 pm - 10:30 am
BWI
-
OPO
14h 55m
2 stops
Delta Logo
5:00 am - 11:01 pm
OPO
-
BWI
22h 01m
2 stops
$499Delta
Sun, Apr 12 - Wed, Apr 29
Delta Logo
6:59 pm - 6:10 pm
BWI
-
OPO
18h 11m
2 stops
Delta Logo
11:45 am - 12:38 am
OPO
-
BWI
17h 53m
2 stops
$503Delta
Tue, Mar 17 - Tue, Mar 24
Air France Logo
3:35 pm - 10:30 am
BWI
-
OPO
14h 55m
2 stops
Air France Logo
11:25 am - 11:01 pm
OPO
-
BWI
15h 36m
2 stops
$505Air France
Sun, Feb 22 - Tue, Mar 10
British Airways Logo
8:35 pm - 4:40 pm
BWI
-
OPO
15h 05m
1 stop
British Airways Logo
8:40 pm - 7:45 pm
OPO
-
BWI
27h 05m
2 stops
$507British Airways
Sun, Feb 22 - Tue, Mar 10
British Airways Logo
8:35 pm - 4:40 pm
BWI
-
OPO
15h 05m
1 stop
British Airways Logo
8:40 pm - 7:45 pm
OPO
-
BWI
27h 05m
2 stops
$508British Airways
Tue, Mar 10 - Tue, Mar 17
British Airways Logo
9:35 pm - 5:45 pm
BWI
-
OPO
16h 10m
1 stop
British Airways Logo
8:40 pm - 7:45 pm
OPO
-
BWI
27h 05m
2 stops
$509British Airways
Mon, Feb 16 - Wed, Feb 25
United Airlines Logo
6:30 am - 2:55 pm
BWI
-
OPO
27h 25m
2 stops
United Airlines Logo
6:00 am - 9:17 pm
OPO
-
BWI
20h 17m
2 stops
$512United 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 ($497) and KLM ($504).

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.

Good to know

Low seasonNovember
Cheapest flight$221
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 $221 for a one-way ticket and $492 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 8033 reviews
7.9Comfort
8.1Boarding
7.2Food
7.8Entertainment
8.5Crew
Airline reviews

Food is basically Sun Chips, cookies or Cheezits. I had an exit row seat so I had plenty of room. The crew was very nice and efficient. Pilot kept us informed. Pretty good flight.

8.0 ExcellentG, Jan 2026
FLL - ATL
Read more Delta reviews

Food is basically Sun Chips, cookies or Cheezits. I had an exit row seat so I had plenty of room. The crew was very nice and efficient. Pilot kept us informed. Pretty good flight.

Air travel sucks. It continues to be awful for all airlines. No shame on delta alone.

It was Delta, but the flight attendants were stressful and disrespectful. I am a diamond member a travel weekly. I have not had a negative thing to share in quite some time. But this was noticeable.

Comfort Plus seat 11E seemed smaller than prior flights. The movie selection is good. Watched most of the most recent Tron movie. I'll watch the remaining part later as my movie is saved in the Delta Seatback Experience.

Flight was late from Newark to Atlanta, I asked flight attendant to please let my family of 3 out first when we landed to Atlanta because we were late for our connecting flight to Quito. She didn't and we were late for 5 minutes we couldn't board the plane and spend hours trying to get another flight with customer service for the next day.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Late delayed flight delays boarding and delays leaving and delays on arrival too. Cramped plane no room no food.

DTW line is too long. The flights from DTW to BWI are always delayed for unknown reasons.

Delta canceled our flight and we had to scramble to find another airline to get home. Phoenix is not a delta hub so they didn’t have another plane. It would have been a red eye though Salt Lake City. Getting in at 5am. No bueno.

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

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

Information on your arrival and departure airports