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Cheap flights from the United States to Porto from $177

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 9/25. 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

SWISS Logo
9:55 pm - 11:15 amBOS-OPO
32h 20m1 stop
SWISS Logo
12:05 pm - 8:20 pmOPO-BOS
13h 15m1 stop
$351SWISS
Find Deal
mar., nov. 11 - mar., nov. 18
Lufthansa Logo
8:40 pm - 1:10 pmBOS-OPO
11h 30m1 stop
Lufthansa Logo
6:00 am - 1:25 pmOPO-BOS
12h 25m1 stop
$353Lufthansa
Find Deal
mié., nov. 19 - mié., nov. 26
Logo
8:40 pm - 12:50 pmBOS-OPO
11h 10m1 stop
Logo
12:05 pm - 8:20 pmOPO-BOS
13h 15m1 stop
$355
Find Deal
lun., dic. 29 - mar., ene. 13
United Airlines Logo
1:39 pm - 9:30 amBOS-OPO
14h 51m1 stop
United Airlines Logo
12:35 pm - 9:34 pmOPO-BOS
13h 59m1 stop
$388United Airlines
Find Deal
sáb., nov. 8 - mar., nov. 18
United Airlines Logo
10:20 am - 9:20 amBOS-OPO
18h 00m1 stop
United Airlines Logo
12:50 pm - 12:42 pmOPO-BOS
28h 52m2 stops
$396United Airlines
Find Deal
mié., ago. 13 - mar., sep. 9
TAP AIR PORTUGAL Logo
10:55 pm - 10:35 amBOS-OPO
6h 40mnonstop
TAP AIR PORTUGAL Logo
5:40 pm - 8:20 pmOPO-BOS
7h 40mnonstop
$414TAP AIR PORTUGAL
Find Deal
dom., ago. 31 - sáb., sep. 13
TAP AIR PORTUGAL Logo
12:15 am - 11:50 amEWR-OPO
6h 35mnonstop
TAP AIR PORTUGAL Logo
6:35 pm - 10:00 pmOPO-EWR
8h 25mnonstop
$432TAP AIR PORTUGAL
Find Deal
dom., ene. 25 - dom., feb. 8
KLM Logo
6:50 pm - 10:30 amIAD-OPO
10h 40m1 stop
KLM Logo
11:25 am - 11:00 pmOPO-IAD
16h 35m2 stops
$523KLM
Find Deal
dom., nov. 2 - mar., nov. 11
Delta Logo
12:15 pm - 10:30 amBWI-OPO
17h 15m2 stops
Delta Logo
11:25 am - 10:56 pmOPO-BWI
16h 31m2 stops
$528Delta
Find Deal
lun., nov. 17 - mar., nov. 25
Delta Logo
12:30 pm - 10:30 amIAD-OPO
17h 00m2 stops
Delta Logo
6:30 am - 7:11 pmOPO-IAD
17h 41m2 stops
$542Delta
Find Deal
mié., nov. 19 - vie., nov. 28

United Airlines flights from United States to Porto

Our best United Airlines deals on United States to Porto flight tickets
United Airlines
Nov 8
BOS1:39 pmBoston Logan Intl
14h 51m
1 stop
OPO9:30 amPorto
Nov 18
OPO12:35 pmPorto
13h 59m
1 stop
BOS9:34 pmBoston Logan Intl
$388
Find similar
United Airlines
Aug 13
BOS10:20 amBoston Logan Intl
18h 00m
1 stop
OPO9:20 amPorto
Sep 9
OPO12:50 pmPorto
28h 52m
2 stops
BOS12:42 pmBoston Logan Intl
$396
Find similar
United Airlines
Aug 13
BOS5:50 amBoston Logan Intl
22h 30m
1 stop
OPO9:20 amPorto
Sep 9
OPO12:50 pmPorto
28h 52m
2 stops
BOS12:42 pmBoston Logan Intl
$397
Find similar

TAP AIR PORTUGAL flights from United States to Porto

Our best TAP AIR PORTUGAL deals on United States to Porto flight tickets
TAP AIR PORTUGAL
Aug 31
BOS10:55 pmBoston Logan Intl
6h 40m
OPO10:35 amPorto
Sep 13
OPO5:40 pmPorto
7h 40m
BOS8:20 pmBoston Logan Intl
$414
Find similar
TAP AIR PORTUGAL
Jan 25
EWR12:15 amNewark
6h 35m
OPO11:50 amPorto
Feb 8
OPO6:35 pmPorto
8h 25m
EWR10:00 pmNewark
$432
Find similar
TAP AIR PORTUGAL
Nov 26
EWR12:15 amNewark
6h 35m
OPO11:50 amPorto
Nov 30
OPO6:35 pmPorto
8h 25m
EWR10:00 pmNewark
$433
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 julio 31, 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

mar. 11/11

9:55 pm-11:15 am

1 stop32h 20m

Porto

mar. 11/18

12:05 pm-8:20 pm

1 stop13h 15m

$351

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

mié. 11/19

8:40 pm-1:10 pm

1 stop11h 30m

Porto

mié. 11/26

6:00 am-1:25 pm

1 stop12h 25m

$353

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

lun. 12/29

8:40 pm-12:50 pm

1 stop11h 10m

Porto

mar. 1/13

12:05 pm-8:20 pm

1 stop13h 15m

$355

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

sáb. 11/8

1:39 pm-9:30 am

1 stop14h 51m

Porto

mar. 11/18

12:35 pm-9:34 pm

1 stop13h 59m

$388

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

mié. 8/13

10:20 am-9:20 am

1 stop18h 00m

Porto

mar. 9/9

12:50 pm-12:42 pm

2 stops28h 52m

$396

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

dom. 8/31

10:55 pm-10:35 am

Nonstop6h 40m

Porto

sáb. 9/13

5:40 pm-8:20 pm

Nonstop7h 40m

$414

NewarkPorto

EWR - OPO

EWROPO

Newark

dom. 1/25

12:15 am-11:50 am

Nonstop6h 35m

Porto

dom. 2/8

6:35 pm-10:00 pm

Nonstop8h 25m

$432

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

dom. 11/2

6:50 pm-10:30 am

1 stop10h 40m

Porto

mar. 11/11

11:25 am-11:00 pm

2 stops16h 35m

$523

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

lun. 11/17

12:15 pm-10:30 am

2 stops17h 15m

Porto

mar. 11/25

11:25 am-10:56 pm

2 stops16h 31m

$528

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 11/19

12:30 pm-10:30 am

2 stops17h 00m

Porto

vie. 11/28

6:30 am-7:11 pm

2 stops17h 41m

$542

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 November is, on average, the cheapest month to fly to Porto from United States, with most prices found around $570. If you aren’t able to travel during the month of November, then book flights to Porto from United States during February instead. Flights to Porto in February, while not as cheap as those in November, still average around $572.

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 $805. 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 $1,003. 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 $1,142 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 $688 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 $572 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?

You could potentially save up to 11% on your flight if you consider stops on a United States to Porto flight.

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

$177

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 $177. The best round-trip flight deal from United States to Porto found on momondo in the last 72 hours is $351.
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
7.3
1,457 reviews
Search Scandinavian Airlines flights
Azores AirlinesPriceFrom $293Free CancellationRating
7.5
67 reviews
Search Azores Airlines flights
SWISSPriceFrom $338Free CancellationRating
7.5
1,686 reviews
Search SWISS flights
IberiaPriceFrom $389Free CancellationRating
7.0
2,859 reviews
Search Iberia flights
LEVELPriceFrom $402Free CancellationRating
4.0
4 reviews
Search LEVEL flights
British AirwaysPriceFrom $425Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
KLMPriceFrom $425Free CancellationRating
7.8
1,383 reviews
Search KLM flights
DeltaPriceFrom $435Free CancellationRating
8.0
7,981 reviews
Search Delta flights
TAP AIR PORTUGALPriceFrom $456Free CancellationRating
7.1
1,933 reviews
Search TAP AIR PORTUGAL flights
Air EuropaPriceFrom $464Free CancellationRating
7.0
543 reviews
Search Air Europa flights

Traveling to a place near Porto?

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

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