BWI - OPO

$320 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 3/17. 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
$590
Typical prices: $666-$695
Delta
Mon 3/23Tue 3/31
BWI - OPO • 2 stops
Cheapest one-way
$320
Multiple Airlines
Tue 3/17
BWI - OPO • 3 stops
Top airlines
Delta
Cheapest • from $590 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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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

Mon, Mar 23 - Tue, Mar 31
Delta Logo
3:35 pm - 10:30 am
BWI
-
OPO
14h 55m
2 stops
Delta Logo
5:00 am - 4:49 pm
OPO
-
BWI
16h 49m
2 stops
$590Delta
Tue, Apr 7 - Wed, Apr 15
Delta Logo
5:35 pm - 3:30 pm
BWI
-
OPO
16h 55m
2 stops
Delta Logo
5:00 am - 6:17 pm
OPO
-
BWI
18h 17m
2 stops
$621Delta
Mon, Mar 16 - Mon, Mar 23
United Airlines Logo
5:12 pm - 2:55 pm
BWI
-
OPO
17h 43m
2 stops
United Airlines Logo
12:30 pm - 9:42 pm
OPO
-
BWI
37h 12m
2 stops
$625United Airlines
Wed, Mar 18 - Mon, Mar 23
British Airways Logo
9:35 pm - 4:45 pm
BWI
-
OPO
15h 10m
1 stop
British Airways Logo
5:30 pm - 7:45 pm
OPO
-
BWI
30h 15m
1 stop
$628British Airways
Sun, Mar 22 - Wed, Apr 1
British Airways Logo
9:35 pm - 4:40 pm
BWI
-
OPO
15h 05m
1 stop
British Airways Logo
8:20 pm - 7:40 pm
OPO
-
BWI
28h 20m
1 stop
$631British Airways
Mon, Apr 20 - Mon, Apr 27
United Airlines Logo
6:00 am - 9:45 am
BWI
-
OPO
22h 45m
2 stops
United Airlines Logo
6:00 am - 9:23 pm
OPO
-
BWI
20h 23m
2 stops
$633United Airlines
Mon, Apr 20 - Mon, Apr 27
United Airlines Logo
6:00 am - 9:45 am
BWI
-
OPO
22h 45m
2 stops
United Airlines Logo
6:00 am - 9:23 pm
OPO
-
BWI
20h 23m
3 stops
$638United Airlines
Sun, Mar 1 - Sun, Mar 8
United Airlines Logo
6:30 am - 9:30 am
BWI
-
OPO
22h 00m
2 stops
United Airlines Logo
12:30 pm - 2:06 pm
OPO
-
BWI
29h 36m
2 stops
$639United Airlines
Mon, Mar 23 - Thu, Apr 2
Delta Logo
6:00 am - 10:30 am
BWI
-
OPO
24h 30m
2 stops
Delta Logo
4:20 pm - 11:42 am
OPO
-
BWI
48h 22m
2 stops
$645Delta
Wed, Mar 25 - Wed, Apr 8
Delta Logo
3:35 pm - 3:25 pm
BWI
-
OPO
19h 50m
2 stops
Delta Logo
5:00 am - 11:59 pm
OPO
-
BWI
23h 59m
2 stops
$655Delta
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 ($590) and United Airlines ($625).

Find deals

Good to know

Low seasonNovember
Cheapest flight$320
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 $320 for a one-way ticket and $590 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 8130 reviews
8.1Boarding
7.9Comfort
7.2Food
8.5Crew
7.8Entertainment
Airline reviews

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

2.0 MediocreTodd, Jan 2026
IAH - ATL
Read more Delta reviews

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Timing, quality of service, promptness and courtesy of the staff

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The flight was comfortable and uneventful, which is what I desire

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

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

Information on your arrival and departure airports

Baltimore (BWI)
Porto (OPO)