BWI - OPO

$321 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 5/16. 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

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$757
Multiple Airlines
Mon 4/13Tue 4/21
BWI - OPO • 2 stops
Cheapest one-way
$321
Multiple Airlines
Sat 5/16
BWI - OPO • 2 stops
Top airlines
Delta
Cheapest • from $807 (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.
Insights
Insights
Insights
Insights
Start a new search
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, Apr 13 - Tue, Apr 21
Multiple Airlines Logo
8:30 pm - 6:20 pm
BWI
-
OPO
16h 50m
2 stops
Multiple Airlines Logo
9:30 pm - 10:20 pm
OPO
-
BWI
29h 50m
3 stops
$757Multiple Airlines
Mon, Apr 13 - Tue, Apr 21
Multiple Airlines Logo
8:30 pm - 9:55 am
BWI
-
OPO
32h 25m
3 stops
Multiple Airlines Logo
6:15 am - 10:20 pm
OPO
-
BWI
45h 05m
3 stops
$768Multiple Airlines
Tue, Apr 21 - Tue, Apr 28
Delta Logo
5:37 pm - 3:25 pm
BWI
-
OPO
16h 48m
2 stops
Delta Logo
5:00 am - 4:49 pm
OPO
-
BWI
16h 49m
2 stops
$807Delta
Sat, Apr 25 - Thu, May 7
Delta Logo
5:36 pm - 3:30 pm
BWI
-
OPO
16h 54m
2 stops
Delta Logo
5:00 am - 4:38 pm
OPO
-
BWI
16h 38m
2 stops
$812Delta
Sat, Aug 15 - Tue, Sep 15
United Airlines Logo
12:30 pm - 6:55 am
BWI
-
OPO
13h 25m
2 stops
United Airlines Logo
12:35 pm - 12:43 am
OPO
-
BWI
17h 08m
2 stops
$825United Airlines
Mon, Apr 13 - Sun, Apr 19
Multiple Airlines Logo
8:30 pm - 6:20 pm
BWI
-
OPO
16h 50m
2 stops
Multiple Airlines Logo
10:05 am - 11:54 pm
OPO
-
BWI
18h 49m
3 stops
$835Multiple Airlines
Wed, Jul 22 - Thu, Aug 27
Delta Logo
5:00 pm - 3:25 pm
BWI
-
OPO
17h 25m
2 stops
Delta Logo
5:00 am - 10:13 pm
OPO
-
BWI
22h 13m
2 stops
$837Delta
Mon, May 11 - Thu, May 21
British Airways Logo
9:30 pm - 8:05 pm
BWI
-
OPO
17h 35m
1 stop
British Airways Logo
9:55 am - 7:40 pm
OPO
-
BWI
14h 45m
1 stop
$843British Airways
Mon, Apr 13 - Sun, Apr 19
Multiple Airlines Logo
8:30 pm - 9:55 am
BWI
-
OPO
32h 25m
3 stops
Multiple Airlines Logo
10:05 am - 11:54 pm
OPO
-
BWI
18h 49m
3 stops
$845Multiple Airlines
Sun, Jul 26 - Fri, Aug 21
Delta Logo
9:39 am - 10:25 am
BWI
-
OPO
19h 46m
2 stops
Delta Logo
12:45 pm - 12:16 am
OPO
-
BWI
16h 31m
2 stops
$851Delta
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 ($807) and United Airlines ($825).

Find deals

Good to know

Cheapest flight$321
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 $321 for a one-way ticket and $757 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 8340 reviews
7.9Comfort
7.8Entertainment
8.1Boarding
7.2Food
8.5Crew
Airline reviews

Delta is always a wonderful experience. A clean plane and the crew is really friendly.

10.0 ExcellentCharlean, Mar 2026
LAS - ATL
Read more Delta reviews

Delta is always a wonderful experience. A clean plane and the crew is really friendly.

Too many people are taking up space in the overhead bins with their extra piece of luggage. Since they cannot fit their backpacks or extra luggage piece under the seat in front of them, they store it in the overheads and thus taking up room for other passengers. It wasn’t only one or two persons; more like 12 or 13 passengers.

Excellent service, I love the soft blush pink mood lighting on the 767-400ER during meal service. The overhead gasper vents on the 767-400ER were also very strong with a lot of airflow to keep me comfortable on my flight.

This was the worse experience. They delayed our flight twice and we still had to find another flight to get home sooner which was alos delayed. Also, the flight attendant named Ginny on DL9890 leaving at 4:13pm on 3/23/26 was extremely rude.

I love Delta the flight attendants were personable and the flight arrived 1/2 earlier thanks expected. All a plus. The gate agent was a bit flustered but even with that I still had a good experience. Her supervisor assisted me.

Got to fly my favorite plane, the Boeing 767-400ER, to Milan. The soft blush pink mood lighting during meal service was very beautiful and gorgeous. The service was top-notch, and our flights were on time. I highly recommend Delta.

I am still at the Airport! Delayed Delayed and Delyaed

I took seat 15A in anticipation of window seat, there is no window.

The first class flight attendant was awful to everyone. Very rude; no customer service. She should not be working in first class.

Snacks and included beverages were appreciated. Boarding went smoothly. Plenty of overhead bin space. Seats get very uncomfortable after a couple of hours. After waiting 10 painful minutes for my walker, a very nice Delta guest agent pushed me in a wheelchair to the gate. It was finally delivered to me after another 15 minutes . Our checked bag was on the carousel long b4 I was able to retrieve it. Fortunately it was still there but somewhere along the way the straps we used to secure it were removed and and were not reattached. Wish I had made note of the agents name.

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

Information on your arrival and departure airports

Baltimore (BWI)
Porto (OPO)