BWI - OPO

$352 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 11/1. 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
$742
Typical prices: $652-$630
United Airlines
Wed 10/28Tue 11/3
BWI - OPO • 2 stops
Cheapest one-way
$352
Delta
Sun 11/1
BWI - OPO • 2 stops
Top airlines
United Airlines
Cheapest • from $742 (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
When to travel
January
Cheapest • 100% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Wed, Oct 28 - Tue, Nov 3
United Airlines Logo
8:15 am - 9:30 am
BWI
-
OPO
21h 15m
2 stops
United Airlines Logo
12:30 pm - 12:38 am
OPO
-
BWI
17h 08m
2 stops
$742United Airlines
Sun, Oct 25 - Wed, Nov 4
United Airlines Logo
6:17 am - 9:30 am
BWI
-
OPO
23h 13m
2 stops
United Airlines Logo
12:30 pm - 12:38 am
OPO
-
BWI
17h 08m
2 stops
$747United Airlines
Sun, Aug 16 - Tue, Aug 25
Delta Logo
6:32 pm - 3:30 pm
BWI
-
OPO
15h 58m
2 stops
Delta Logo
5:00 am - 4:49 pm
OPO
-
BWI
16h 49m
2 stops
$808Delta
Sat, Aug 8 - Wed, Aug 19
United Airlines Logo
6:15 am - 6:55 am
BWI
-
OPO
43h 40m
2 stops
United Airlines Logo
2:25 pm - 9:49 am
OPO
-
BWI
48h 24m
2 stops
$812United Airlines
Thu, Oct 8 - Tue, Oct 13
Delta Logo
8:10 am - 10:30 am
BWI
-
OPO
21h 20m
2 stops
Delta Logo
5:00 am - 10:10 pm
OPO
-
BWI
22h 10m
2 stops
$868Delta
Mon, Oct 19 - Tue, Oct 27
American Airlines Logo
10:50 am - 7:40 am
BWI
-
OPO
15h 50m
2 stops
American Airlines Logo
8:20 am - 9:40 pm
OPO
-
BWI
17h 20m
2 stops
$871American Airlines
Thu, Oct 1 - Thu, Oct 29
Delta Logo
12:15 pm - 10:30 am
BWI
-
OPO
17h 15m
2 stops
Delta Logo
10:00 am - 10:37 pm
OPO
-
BWI
16h 37m
2 stops
$876Delta
Sun, Aug 9 - Wed, Aug 19
Delta Logo
12:30 pm - 10:25 am
BWI
-
OPO
16h 55m
2 stops
Delta Logo
5:00 am - 4:49 pm
OPO
-
BWI
16h 49m
2 stops
$891Delta
Tue, Sep 1 - Tue, Sep 8
Delta Logo
2:10 pm - 10:30 am
BWI
-
OPO
15h 20m
2 stops
Delta Logo
11:35 am - 12:16 am
OPO
-
BWI
17h 41m
2 stops
$895Delta
Thu, Oct 22 - Mon, Oct 26
Delta Logo
1:00 pm - 10:30 am
BWI
-
OPO
16h 30m
2 stops
Delta Logo
10:00 am - 10:55 pm
OPO
-
BWI
16h 55m
2 stops
$896Delta
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.

What is the cheapest month to fly from Baltimore to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Baltimore to Porto, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Baltimore to Porto is January, where tickets cost $0 (return) on average. On the other hand, the most expensive months are April and July, where the average cost of round-trip tickets is $4,242 and $969 respectively.

Find deals

Good to know

Low seasonAugust
Cheapest flight$352
Best time to beat the crowds with an average 52% drop in price.
Most popular time to fly and prices are also 37% 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 $352 for a one-way ticket and $742 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 8451 reviews
7.2Food
8.1Boarding
7.8Entertainment
7.8Comfort
8.5Crew
Airline reviews

Bus to plane was delayed for no apparent reason and our luggage was still on the belt when they shut it off. Took about 20 minutes to turn it back on to get our luggage.

6.0 GoodAnonymous, May 2026
PDX - MSP
Read more Delta reviews

Bus to plane was delayed for no apparent reason and our luggage was still on the belt when they shut it off. Took about 20 minutes to turn it back on to get our luggage.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The flight was operated by Latam. The aircraft had a technical issue and the flight was delayed for the next day. They grounded other passengers to get their airplane assigned to my flight. Most of he ground staff don't speak English (Orlando Airport), but were very polite.The crew on the other hand could speak English and Portuguese. On board service was good.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

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

Information on your arrival and departure airports

Baltimore (BWI)
Porto (OPO)