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Cheap flights from the United States to Porto from $233

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to Porto departing on 12/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from the United States to Porto

Recent round-trip flight deals from the United States to Porto

Enter your travel dates to find the best prices.
Air Canada Logo
5:30 am - 11:10 amBOS-OPO
24h 40m2 stops
Air Canada Logo
6:00 am - 9:57 amOPO-BOS
32h 57m2 stops
$402Air Canada
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Sun, Feb 8 - Thu, Feb 19
TAP AIR PORTUGAL Logo
10:25 pm - 10:00 pmBOS-OPO
18h 35m1 stop
TAP AIR PORTUGAL Logo
9:00 am - 8:10 pmOPO-BOS
16h 10m1 stop
$403TAP AIR PORTUGAL
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Sat, Nov 29 - Fri, Dec 5
Delta Logo
9:59 am - 10:30 amBOS-OPO
19h 31m2 stops
Delta Logo
11:25 am - 7:33 amOPO-BOS
25h 08m2 stops
$408Delta
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Wed, Dec 3 - Tue, Dec 9
Delta Logo
11:30 am - 10:30 amBOS-OPO
18h 00m2 stops
Delta Logo
6:00 am - 6:56 pmOPO-BOS
17h 56m2 stops
$409Delta
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Wed, Feb 11 - Wed, Feb 18
Iberia Logo
4:45 pm - 7:40 amBOS-OPO
9h 55m1 stop
Iberia Logo
8:20 am - 3:15 pmOPO-BOS
11h 55m1 stop
$420Iberia
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Thu, Feb 5 - Wed, Feb 11
United Airlines Logo
9:30 am - 9:30 amBOS-OPO
19h 00m2 stops
United Airlines Logo
12:35 pm - 11:48 pmOPO-BOS
15h 13m2 stops
$428United Airlines
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Thu, Mar 5 - Wed, Mar 18
United Airlines Logo
6:24 pm - 9:30 amBOS-OPO
10h 06m1 stop
United Airlines Logo
6:00 am - 1:25 pmOPO-BOS
12h 25m1 stop
$430United Airlines
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Fri, Nov 28 - Tue, Dec 9
Iberia Logo
5:20 pm - 7:40 amBOS-OPO
33h 20m2 stops
Iberia Logo
8:40 pm - 3:15 pmOPO-BOS
23h 35m1 stop
$451Iberia
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Sat, Jan 31 - Sat, Feb 7
KLM Logo
6:30 pm - 10:30 amBOS-OPO
11h 00m1 stop
KLM Logo
11:25 am - 10:24 pmOPO-BOS
15h 59m2 stops
$453KLM
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Fri, Nov 14 - Tue, Nov 18
KLM Logo
4:25 pm - 3:25 pmORD-OPO
17h 00m1 stop
KLM Logo
4:10 pm - 2:20 pmOPO-ORD
28h 10m1 stop
$483KLM
Find Deal
Wed, Nov 26 - Tue, Dec 2

Delta flights from United States to Porto

Our best Delta deals on United States to Porto flight tickets
Delta
Dec 3
BOS9:59 amBoston Logan Intl
19h 31m
2 stops
OPO10:30 amPorto
Dec 9
OPO11:25 amPorto
25h 08m
2 stops
BOS7:33 amBoston Logan Intl
$408
Find similar
Delta
Nov 10
BOS9:59 amBoston Logan Intl
19h 31m
2 stops
OPO10:30 amPorto
Nov 19
OPO6:00 amPorto
17h 55m
2 stops
BOS6:55 pmBoston Logan Intl
$409
Find similar
Delta
Nov 11
BWI2:35 pmBaltimore/Washington
14h 55m
2 stops
OPO10:30 amPorto
Nov 18
OPO6:05 amPorto
17h 58m
2 stops
BWI7:03 pmBaltimore/Washington
$492
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ITA Airways flights from United States to Porto

Our best ITA Airways deals on United States to Porto flight tickets
ITA Airways
Jan 25
JFK9:15 pmNew York John F Kennedy Intl
37h 00m
2 stops
OPO3:15 pmPorto
Feb 17
OPO7:35 amPorto
16h 20m
2 stops
JFK6:55 pmNew York John F Kennedy Intl
$409
Find similar
ITA Airways
Jan 24
JFK4:45 pmNew York John F Kennedy Intl
21h 35m
2 stops
OPO7:20 pmPorto
Feb 3
OPO11:35 amPorto
31h 40m
2 stops
JFK2:15 pmNew York John F Kennedy Intl
$411
Find similar
ITA Airways
Jan 15
JFK9:15 pmNew York John F Kennedy Intl
37h 00m
2 stops
OPO3:15 pmPorto
Jan 19
OPO7:35 amPorto
35h 40m
2 stops
JFK2:15 pmNew York John F Kennedy Intl
$416
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from United States to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from the United States to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 2/8

5:30 am-11:10 am

2 stops24h 40m

Porto

Thu 2/19

6:00 am-9:57 am

2 stops32h 57m

$402

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 11/29

10:25 pm-10:00 pm

1 stop18h 35m

Porto

Fri 12/5

9:00 am-8:10 pm

1 stop16h 10m

$403

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 12/3

9:59 am-10:30 am

2 stops19h 31m

Porto

Tue 12/9

11:25 am-7:33 am

2 stops25h 08m

$408

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 2/11

11:30 am-10:30 am

2 stops18h 00m

Porto

Wed 2/18

6:00 am-6:56 pm

2 stops17h 56m

$409

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 2/5

4:45 pm-7:40 am

1 stop9h 55m

Porto

Wed 2/11

8:20 am-3:15 pm

1 stop11h 55m

$420

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 3/5

9:30 am-9:30 am

2 stops19h 00m

Porto

Wed 3/18

12:35 pm-11:48 pm

2 stops15h 13m

$428

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 11/28

6:24 pm-9:30 am

1 stop10h 06m

Porto

Tue 12/9

6:00 am-1:25 pm

1 stop12h 25m

$430

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sat 1/31

5:20 pm-7:40 am

2 stops33h 20m

Porto

Sat 2/7

8:40 pm-3:15 pm

1 stop23h 35m

$451

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 11/14

6:30 pm-10:30 am

1 stop11h 00m

Porto

Tue 11/18

11:25 am-10:24 pm

2 stops15h 59m

$453

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/26

4:25 pm-3:25 pm

1 stop17h 00m

Porto

Tue 12/2

4:10 pm-2:20 pm

1 stop28h 10m

$483

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Porto from

How to get the cheapest flight ticket from United States to Porto

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Porto?

The month of March is, on average, the cheapest month to fly to Porto from United States, with most prices found around $589. If you aren’t able to travel during the month of March, then book flights to Porto from United States during February instead. Flights to Porto in February, while not as cheap as those in March, still average around $599.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Wednesday when prices can be found for as low as $804. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,020. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

At noon is the cheapest time of day to fly from United States to Porto when you can find flight prices for as low as $435. Flying to Porto at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,129 on average. Flights to Porto from United States in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest United States to Porto flight route?

Fly from Boston Logan Intl to Porto for the best United States - Porto flight prices

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $674 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from United States for as low as $580 on momondo.

What cabin class options are available on United States to Porto flights?

There are 3 cabin classes available to choose from on United States to Porto flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on United States to Porto flights?

No. A direct flight is the cheapest option for a flight between United States to Porto.

Cheap United States to Porto flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to Porto

Best Price Found

$180

Fastest flight time

6h 35m

Direct flights

Every day

Airports in Porto

1 airport
The best one-way flight to Porto from United States in the past 72 hours is $180. The best round-trip flight deal from United States to Porto found on momondo in the last 72 hours is $573.
The fastest flight from United States to Porto takes 6h 35m
Direct flights go from United States to Porto every day.
There is 1 airport near Porto: Porto (OPO)
Search flight deals

  • When did momondo last update prices for flights from United States to Porto Airport?

    Prices for flights from United States to Porto Airport refresh daily.

  • How many operators does momondo search for flights from United States to Porto Airport?

  • How old do you have to be to fly from United States to Porto Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United States to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from United States to Porto?

Best airlines flying from United States to Porto

Compare and see reviews for airlines that fly from United States to Porto with momondo
Airline
Rating
Free Cancellation
Price
Scandinavian AirlinesPriceFrom $269Free CancellationRating
7.4
1,548 reviews
Search Scandinavian Airlines flights
SWISSPriceFrom $338Free CancellationRating
7.5
1,775 reviews
Search SWISS flights
IberiaPriceFrom $374Free CancellationRating
7.0
3,004 reviews
Search Iberia flights
British AirwaysPriceFrom $374Free CancellationRating
6.7
7,488 reviews
Search British Airways flights
KLMPriceFrom $394Free CancellationRating
7.7
1,406 reviews
Search KLM flights
Air EuropaPriceFrom $395Free CancellationRating
7.0
568 reviews
Search Air Europa flights
LEVELPriceFrom $402Free CancellationRating
0.0
Search LEVEL flights
Air CanadaPriceFrom $434Free CancellationRating
7.1
10,383 reviews
Search Air Canada flights
United AirlinesPriceFrom $450Free CancellationRating
7.4
8,996 reviews
Search United Airlines flights
TAP AIR PORTUGALPriceFrom $457Free CancellationRating
7.1
2,040 reviews
Search TAP AIR PORTUGAL flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Aveiro
Braga
Matosinhos
Lamego
Esposende
Guimarães
Chaves
Espinho
Viseu
Ponte de Lima
Arcos de Valdevez
Pinhao
Curia
Penafiel
Mesao Frio
Mira
Baiao

Why use momondo?

Why should I use momondo to find a flight deal from United States to Porto?

It is quick and easy to find United States to Porto flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Porto that suits you.

Can I find flights from United States to Porto with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for United States to Porto flights to just show those with flexible booking policies.

How can momondo help me find flights from United States to Porto?

Once you have performed a search for United States to Porto flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from United States to Porto right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of United States to Porto flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Porto trip

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