BWI - OPO

$369 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 10/14. 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
$816
United Airlines
Mon 8/3Thu 9/3
BWI - OPO • 2 stops
Cheapest one-way
$346
Delta
Wed 10/14
BWI - OPO • 2 stops
Top airlines
Cheapest • from $816 (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
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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 3 - Thu, Sep 3
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
$816United 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
9:35 am - 10:25 am
BWI
-
OPO
19h 50m
2 stops
Delta Logo
5:00 am - 3:51 pm
OPO
-
BWI
15h 51m
2 stops
$868Delta
Mon, Aug 10 - Mon, Aug 24
British Airways Logo
9:30 pm - 8:05 pm
BWI
-
OPO
17h 35m
1 stop
British Airways Logo
9:25 pm - 5:15 pm
OPO
-
BWI
24h 50m
1 stop
$870British Airways
Wed, Aug 12 - Wed, Aug 19
Delta Logo
1:00 pm - 10:40 am
BWI
-
OPO
16h 40m
2 stops
Delta Logo
11:45 am - 10:13 pm
OPO
-
BWI
15h 28m
2 stops
$874Delta
Wed, Jul 15 - Thu, Oct 15
American Airlines Logo
10:28 am - 11:45 am
BWI
-
OPO
20h 17m
2 stops
American Airlines Logo
8:20 am - 7:26 pm
OPO
-
BWI
16h 06m
2 stops
$877American Airlines
Sat, Aug 8 - Wed, Aug 19
United Airlines Logo
6:45 am - 9:45 am
BWI
-
OPO
22h 00m
2 stops
United Airlines Logo
2:25 pm - 12:43 am
OPO
-
BWI
39h 18m
2 stops
$885United Airlines
Mon, Sep 21 - Tue, Sep 29
Delta Logo
5:33 pm - 3:25 pm
BWI
-
OPO
16h 52m
2 stops
Delta Logo
5:00 am - 4:57 pm
OPO
-
BWI
16h 57m
2 stops
$891Delta
Wed, Sep 9 - Wed, Sep 23
United Airlines Logo
12:30 pm - 6:55 am
BWI
-
OPO
13h 25m
2 stops
United Airlines Logo
12:00 pm - 12:43 am
OPO
-
BWI
17h 43m
2 stops
$894United Airlines
Wed, Sep 9 - Fri, Sep 18
Delta Logo
10:00 am - 10:30 am
BWI
-
OPO
19h 30m
2 stops
Delta Logo
5:00 am - 6:09 pm
OPO
-
BWI
18h 09m
2 stops
$899Delta
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 ($816) and Delta ($838).

Good to know

Cheapest flight$346
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 $346 for a one-way ticket and $809 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 8430 reviews
8.1Boarding
7.2Food
7.8Entertainment
8.5Crew
7.9Comfort
Airline reviews

Crew was nice, meal was good. Entertainment had to be rebooted 3 times and still did not work. Turns out there was residue on screen, it needed to be cleaned to prevent the touchscreen buttons from continuously activating. I had entertainment for the last 45 minutes of a 5 hour 45 minute flight. Really unacceptable for first class. Flight attendent indicated your cleaning solution creates this problem. Seems as if this is widely known, you should be using a different product or cleaning better. Really really disappointing which simply added to the wi fi on your planes with reliably never ever works.

4.0 OkayDerek, Apr 2026
SEA - HNL
Read more Delta reviews

Crew was nice, meal was good. Entertainment had to be rebooted 3 times and still did not work. Turns out there was residue on screen, it needed to be cleaned to prevent the touchscreen buttons from continuously activating. I had entertainment for the last 45 minutes of a 5 hour 45 minute flight. Really unacceptable for first class. Flight attendent indicated your cleaning solution creates this problem. Seems as if this is widely known, you should be using a different product or cleaning better. Really really disappointing which simply added to the wi fi on your planes with reliably never ever works.

The baggage belt was not updated on the Delta App and was displayed on the wrong belt board. Was not expecting this to happen.

The plan was delayed and left DC 90 minutes late. However, it showed a 20 minute delay on the delta app, then a 12 min delay. It turned out to be an hour delay. I found out where the plane was with flightaware. Stop keeping customers in the dark about what is going on.

Everything went smoothly, although the usual gripes about airline travel were still present: the boarding process is inefficient, the snack selection is limited, and so on. Since there was extra space on the flight, the gate agent rearranged many people's seats to put people on the aisles and windows, leaving the middle seats empty, as much as possible, which was pretty great.

Landed without a gate ready. Plane is extremely old and dirty.

All the amenities was wonderful, if they could keep their prices that low. I'd fly with them all the time.

Very old plane with no inflight entertainment. I purchased the internet pass and it was nearly unusable.

My tray was broken so i had no place to work or eat except my lap. Flight attendant said I would get an email with some credit or miles, it was a complete waste of time as I could only function at about 20% of normal. I have not received anything yet.

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

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

Information on your arrival and departure airports