BWI - OPO

$364 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 5/10. 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
$794
United Airlines
Mon 8/10Wed 8/26
BWI - OPO • 2 stops
Cheapest one-way
$364
Multiple Airlines
Sun 5/10
BWI - OPO • 3 stops
Top airlines
Cheapest • from $794 (round-trip)
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.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $992 (round-trip)
Shortest trip • 10h 45m (one-way)
Insights
Insights
Insights
Insights
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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

Mon, Aug 10 - Wed, Aug 26
United Airlines Logo
6:15 am - 7:00 am
BWI
-
OPO
19h 45m
2 stops
United Airlines Logo
2:25 pm - 5:29 pm
OPO
-
BWI
32h 04m
2 stops
$794United Airlines
Wed, Oct 7 - Tue, Oct 20
Delta Logo
1:00 pm - 3:25 pm
BWI
-
OPO
21h 25m
2 stops
Delta Logo
5:00 am - 10:10 pm
OPO
-
BWI
22h 10m
2 stops
$808Delta
Mon, Aug 10 - Wed, Aug 26
United Airlines Logo
8:25 am - 7:00 am
BWI
-
OPO
17h 35m
2 stops
United Airlines Logo
2:25 pm - 9:34 am
OPO
-
BWI
24h 09m
2 stops
$817United Airlines
Sun, Aug 9 - Wed, Aug 26
United Airlines Logo
8:25 am - 6:55 am
BWI
-
OPO
17h 30m
2 stops
United Airlines Logo
2:25 pm - 9:34 am
OPO
-
BWI
24h 09m
2 stops
$818United Airlines
Wed, Oct 7 - Tue, Oct 20
Multiple Airlines Logo
9:30 pm - 7:05 pm
BWI
-
OPO
16h 35m
1 stop
Multiple Airlines Logo
4:40 pm - 7:40 pm
OPO
-
BWI
32h 00m
2 stops
$830Multiple Airlines
Sun, Jul 26 - Fri, Aug 21
Delta Logo
10:33 am - 10:25 am
BWI
-
OPO
18h 52m
2 stops
Delta Logo
5:00 am - 3:51 pm
OPO
-
BWI
15h 51m
2 stops
$838Delta
Sun, Aug 16 - Tue, Aug 25
Delta Logo
10:00 am - 10:25 am
BWI
-
OPO
19h 25m
2 stops
Delta Logo
6:15 am - 6:09 pm
OPO
-
BWI
16h 54m
2 stops
$875Delta
Thu, Aug 13 - Wed, Aug 26
United Airlines Logo
12:30 pm - 6:55 am
BWI
-
OPO
13h 25m
2 stops
United Airlines Logo
2:25 pm - 9:34 am
OPO
-
BWI
24h 09m
2 stops
$878United Airlines
Wed, Aug 5 - Tue, Aug 11
United Airlines Logo
8:25 am - 7:00 am
BWI
-
OPO
17h 35m
2 stops
United Airlines Logo
12:15 pm - 12:43 am
OPO
-
BWI
41h 28m
2 stops
$885United Airlines
Wed, Oct 7 - Tue, Oct 20
British Airways Logo
9:30 pm - 10:25 am
BWI
-
OPO
31h 55m
1 stop
British Airways Logo
8:55 pm - 7:40 pm
OPO
-
BWI
27h 45m
1 stop
$888British 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 United Airlines ($794) and Delta ($808).

Good to know

Cheapest flight$364
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 $364 for a one-way ticket and $794 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 8408 reviews
8.1Boarding
8.5Crew
7.9Comfort
7.2Food
7.8Entertainment
Airline reviews

Short trip, no food and therefore no expectation for much interaction with staff who were pleasant and professional. My critique is on comfort of the seats. Exit rows and comfort seats do not provide enough personal space for 3 side-by-side seats, especially when in the middle row. Some passengers are not considerate of the middle seat and there should be signs that state something to the effect of: "please consider giving middle seats use of the armrests."

8.0 ExcellentMary, Apr 2026
BNA - ATL
Read more Delta reviews

Short trip, no food and therefore no expectation for much interaction with staff who were pleasant and professional. My critique is on comfort of the seats. Exit rows and comfort seats do not provide enough personal space for 3 side-by-side seats, especially when in the middle row. Some passengers are not considerate of the middle seat and there should be signs that state something to the effect of: "please consider giving middle seats use of the armrests."

My flight yesterday evening was delayed 3.5 hours with no water or food service. Poor experience

Transparency from pilots, quick boarding and exiting the plane, staff greeted to each and everyone,

Didn't like sitting on the waiting pad for 30 minutes right after departing the gate. If you're going to do that, just don't board so people can still get up and walk around in the terminal. My luggage was damaged by the baggage handlers.

Pilots lied about waiting on “paperwork”. Sat in the plane for over an hour, waiting on some papers to be printed according to the pilot and then all of a sudden he says good news maintenance is finally on their way. Maybe they can fix it before we get our paperwork. Ended up missing my connection in LaGuardia and as a result, had a fly home to Lexington instead of the Louisville airport. Then paid $100 to uber to Louisville since it was midnight by the time I got in. I wish they would just be transparent with passengers sometimes and not try to beat around the bush on why things are delayed.

The WiFi was horrific. I fly delta often and love their (usually reliable and free) WiFi. On this flight it was intermittent and when it did connect was extremely slow. I couldn’t get any work done while I was on the flight which was extremely frustrating. I was also in the exit row seat where there is now immediate seat in front of you, so while the leg room was nice, I couldn’t even watch the TV when the internet wasn’t working. Finally, for the last 20 mins of the flight, the announcement indicator came on the TV screens and took them over, even though no announcement was being made. Really disappointed.

The flight was way too HOT! And the plane did not have any in-flight TV entertainment.

Boarding was good. The flight was on time ( arrival was 20 minutes early). Inflight service was average ( US airlines have not mastered the skills of customer service yet). The food was mediocre. “ breakfast “ was downright awful and insulting. It was a piece of dough with mon descript filling that was supposed to be cheese omelette).

The tray table was broken and the food was terrible.

The gentleman at the gate I think his name is RIE was exceptional

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

Information on your arrival and departure airports