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$274+ Cheap flights from the United States to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — OPO
Apr 30 — May 71
Thu 4/30
Thu 5/7
1 adult, Economy
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Cheap flight deals from USA to Porto

Cheapest flights from USA to Porto
Explore the most affordable flight options available from USA to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2026.

This Super.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1010:45 pm
BOS
-
OPO
Nonstop6h 45m
TAP AIR PORTUGAL
Sun 11/156:00 pm
OPO
-
BOS
Nonstop7h 45m
TAP AIR PORTUGAL
Deal found 3/29$446
This Super.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2511:45 pm
BOS
-
OPO
Nonstop6h 45m
TAP AIR PORTUGAL
Tue 11/36:00 pm
OPO
-
BOS
Nonstop7h 45m
TAP AIR PORTUGAL
Deal found 3/27$456
This Iberia deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2811:00 pm
BOS
-
OPO
1 stop12h 10m
Iberia
Wed 10/72:05 pm
OPO
-
BOS
1 stop12h 10m
Iberia
Deal found 3/27$483
This FlightHub deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:00 pm
BOS
-
OPO
1 stop12h 05m
TAP AIR PORTUGAL
Tue 11/36:00 pm
OPO
-
BOS
Nonstop7h 45m
TAP AIR PORTUGAL
Deal found 3/28$489
This Iberia deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2711:50 pm
BOS
-
OPO
1 stop27h 10m
Iberia
Thu 10/81:45 pm
OPO
-
BOS
1 stop12h 30m
Iberia
Deal found 3/29$491
This Iberia deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:50 pm
BOS
-
OPO
1 stop12h 20m
Iberia
Wed 10/710:00 pm
OPO
-
BOS
1 stop28h 15m
Iberia
Deal found 3/29$492
This Iberia deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:50 pm
BOS
-
OPO
1 stop17h 30m
Iberia
Mon 9/2810:00 pm
OPO
-
BOS
1 stop28h 15m
Iberia
Deal found 3/27$493
This oojo deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1110:05 pm
JFK
-
OPO
1 stop12h 10m
Air Europa
Sun 9/208:10 pm
OPO
-
JFK
1 stop31h 45m
Air Europa
Deal found 3/29$545
This Gotogate deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2310:05 pm
JFK
-
OPO
1 stop31h 45m
Air Europa
Thu 4/3011:35 am
OPO
-
JFK
1 stop11h 10m
Air Europa
Deal found 3/26$547
This Expedia deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1810:05 pm
JFK
-
OPO
1 stop12h 10m
Air Europa
Mon 4/278:10 pm
OPO
-
JFK
1 stop26h 35m
Air Europa
Deal found 3/28$549
This Mytrip deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1310:05 pm
JFK
-
OPO
2 stops17h 55m
Multiple Airlines
Tue 4/219:30 pm
OPO
-
JFK
2 stops27h 35m
Multiple Airlines
Deal found 3/28$551
This Kiwi.com deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/310:05 pm
JFK
-
OPO
1 stop12h 10m
Air Europa
Thu 5/711:35 am
OPO
-
JFK
1 stop11h 10m
Air Europa
Deal found 3/28$553

Find flight deals from USA to Porto

Keep the following information in mind while searching for USA to Porto flight deals. Data was last updated March 31, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$491
(Iberia)

One-way from

$271
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$690

Good round-trip deal

$660 or less

Good one-way deal

$317 or less
Provider with most accurate pricing for New York (NYC)-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-Porto flights.
Search Deals
From USA to Porto
Search Deals
One-way flight from USA to Porto
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from USA to Porto.
Search Deals
Price to beat on a one-way flight from USA to Porto.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from USA 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, Cheapflights users made 2,558,603 searches. Data last updated March 31, 2026.
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

Cheapest round-trip

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 4/21

1:20 pm-3:40 pm

1 stop21h 20m

Porto

Tue 4/28

4:50 pm-11:35 am

1 stop23h 45m

$617

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 9/7

11:25 am-9:40 am

1 stop16h 15m

Porto

Mon 9/14

4:50 pm-9:40 am

1 stop22h 50m

$637

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 4/28

7:05 pm-10:05 pm

1 stop22h 00m

Porto

Wed 9/30

5:55 am-1:39 pm

1 stop12h 44m

$646

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 4/26

8:59 pm-10:00 pm

2 stops20h 01m

Porto

Tue 9/29

5:00 am-6:29 pm

2 stops18h 29m

$659

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 4/26

8:59 pm-10:00 pm

2 stops20h 01m

Porto

Thu 10/1

4:25 pm-7:35 pm

1 stop32h 10m

$662

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 5/4

7:00 pm-3:25 pm

1 stop15h 25m

Porto

Sun 5/10

5:55 am-1:25 pm

1 stop12h 30m

$664

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 4/29

9:05 am-10:40 am

2 stops20h 35m

Porto

Thu 10/1

4:25 pm-7:35 pm

1 stop32h 10m

$673

MiamiPorto

MIA - OPO

MIAOPO

Miami

Thu 9/24

10:35 pm-9:45 am

1 stop30h 10m

Porto

Thu 10/1

11:00 am-8:40 pm

1 stop38h 40m

$677

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 4/24

7:05 pm-10:00 pm

1 stop21h 55m

Porto

Wed 9/30

11:45 am-10:36 pm

2 stops15h 51m

$706

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 4/24

7:05 pm-10:00 pm

1 stop21h 55m

Porto

Tue 9/29

11:35 am-10:36 pm

2 stops16h 01m

$706

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/28

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from USA to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from USA with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from the United States to Porto

What is the cheapest month to book a flight from USA to Porto?

Currently, February is the cheapest month in which you can book a flight from USA to Porto (average of $354). Flying from USA to Porto in June is currently the most expensive (average of $554). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from US to OPO?

Find hourly flight availability from USA to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 31, 2026.

When flying from USA to Porto, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How often are flights from the United States to Porto delayed?

About 26% of weekly flights between United States and Porto have experienced delays in the past year, with the average delay time being 164 minutes.

What is the most punctual flight time for the United States to Porto flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on the United States to Porto flights?

Over the last year, TAP AIR PORTUGAL have had the lowest number of delays on this route, with just 22% of flights being delayed.

The best insider tips for theUnited States to Porto flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your theUnited States to Porto trip
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on TAP AIR PORTUGAL and KLM

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines and Delta

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Emily Zemler

Emily Zemler

Expert on Iberia

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more
Evie Carrick

Evie Carrick

Expert on Azores Airlines

Evie Carrick is a writer and editor who has lived in five countries and traveled to over 50, with extensive experience flying around the world. She was born in Colorado, but has spent time flying to both coasts to visit family. She writes regularly for Travel + Leisure, BuzzFeed, and SKI and recently published seven travel journals with Simon & Schuster.

Read more

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated March 31, 2026.
Read through reviews of airlines operating flights from the United States to Porto, such as Delta,United Airlines, andTAP AIR PORTUGAL. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,364 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,364 reviews
Delta
7.9
Good
8,364 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,530 reviews
Delta
7.9
Good
8,364 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
TAP AIR PORTUGAL
7.1
Good
2,185 reviews
Delta
7.9
Good
8,364 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Iberia
7.0
Good
3,164 reviews
Delta
7.9
Good
8,364 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Lufthansa
6.8
Okay
7,880 reviews
Delta
7.9
Good
8,364 reviews

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from USA to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from United States?

    Porto (OPO) is the airport you will fly into if you book a flight from United States to Porto. It is only a 6.8 mi journey from Porto (OPO) to Porto’s city center.

  • How long is the flight from USA to Porto?

    For as low as $646, Turkish Airlines can have you in Porto from USA in 22h. Airlines will cover a distance of 3134 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from USA to Porto one-way?

    The cheapest airlines for a one-way flight from USA to Porto are Iberia ($130), United Airlines ($158), and SWISS ($160).

  • What are the most popular routes from USA to Porto?

    When deciding which route to take from USA to Porto consider Newark - Porto, New York John F Kennedy Intl - Porto or Boston Logan Intl - Porto as they are the most popular.

  • Can I find deals for flights from USA to Porto that include hotel bookings?

    Yes. In addition to deals on USA to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from USA to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from USA to Porto.

  • Can I find deals for business class flights from USA to Porto?

    Yes. Cheapflights offers flight deals from USA to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from USA to Porto?

    Currently, February is the cheapest month in which you can book a flight from USA to Porto (average of $354). Flying from USA to Porto in June is currently the most expensive (average of $554). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from USA to Porto

Discover the top 10 airlines that operate flights from USA to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 31, 2026.
AirlineCheapestAverageFlexibilityOn-time
LEVELCheapest$263Average$673FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$269Average$573FlexibilityNo cancel feeOn-time77%
SWISSCheapest$338Average$861FlexibilityNo cancel feeOn-time79%
KLMCheapest$366Average$839FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$369Average$733FlexibilityNo cancel feeOn-time70%
IberiaCheapest$370Average$810FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$380Average$895FlexibilityNo cancel feeOn-time69%
DeltaCheapest$394Average$949FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$395Average$871FlexibilityNo cancel feeOn-time71%
Air EuropaCheapest$400Average$696FlexibilityNo cancel feeOn-time83%

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