BWI - OPO

$363 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 6/5. 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
$363
Multiple Airlines
Fri 6/5
BWI - OPO • 3 stops
Top airlines
United Airlines
Cheapest • from $794 (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
Top layover airports
Newark (EWR)
Cheapest • Avg $992 (round-trip)
Newark (EWR)
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
Wed, Aug 19 - Wed, Sep 9
United Airlines Logo
12:30 pm - 9:45 am
BWI
-
OPO
16h 15m
2 stops
United Airlines Logo
9:00 am - 9:28 pm
OPO
-
BWI
17h 28m
2 stops
$815United Airlines
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
Mon, Sep 21 - Mon, Sep 28
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
$835British Airways
Sun, Sep 20 - Wed, Oct 14
British Airways Logo
9:35 pm - 8:35 pm
BWI
-
OPO
18h 00m
1 stop
British Airways Logo
8:20 pm - 7:40 pm
OPO
-
BWI
28h 20m
1 stop
$849British Airways
Sun, Sep 20 - Wed, Oct 14
British Airways Logo
9:35 pm - 8:35 pm
BWI
-
OPO
18h 00m
1 stop
British Airways Logo
8:20 pm - 7:40 pm
OPO
-
BWI
28h 20m
1 stop
$850British Airways
Mon, Sep 21 - Mon, Oct 12
Multiple Airlines Logo
9:30 pm - 8:00 pm
BWI
-
OPO
17h 30m
2 stops
Multiple Airlines Logo
9:25 pm - 5:41 pm
OPO
-
BWI
25h 16m
2 stops
$862Multiple 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 United Airlines ($794) and Delta ($808).

Find deals

Good to know

Cheapest flight$363
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 $363 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 8406 reviews
7.2Food
7.9Comfort
8.5Crew
7.8Entertainment
8.1Boarding
Airline reviews

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

8.0 ExcellentBarbie, Apr 2026
BOS - SFO
Read more Delta reviews

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

No entertainment. Plane was so small had to pink tag a carry on ive used for 20 years easily on board. The fact the flight got in at midnight, had to wait for crew in fort wayne to allow the plane to approach the gate, THEN had to wait for bag on jet bridge made experience irritating at best.

Crew was great. Near on time departure and early arrival. Snacks are always meh. Not a fan of the "pay for everything including miles " proposal unless base flight rate going to be 100 bucks.

Would have been better if there was a nonstop flight from Tampa to Norfolk or Tampa to New Port News.

Overall Good! The weather delayed our takeoff from Atlanta and our arrival in Miami! If Mother Nature can mess up a flight she will do it every time!

The flight was smooth, the crew was great but the plane was quite old

Everything was great until I lost my water bottle and they can’t seem to locate it. I know I left it on the plane though.

WiFi didn’t work most of the time. The usb chargers would work only occasionally for 5 mins and wouldn’t charge after that. Had to keep trying repeatedly at each of the seats in the row.

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

Okay considering we had weather delays which the Pilot notified us of immediately!

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

Information on your arrival and departure airports

Baltimore (BWI)
Porto (OPO)