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$229+ 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — OPO
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
1 adult, Economy
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Find 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 November 3, 2025.

This SmartFares deal was found by Cheapflights users on 11/2. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/210:05 pmJFK - OPO
1 stop16h 15mAir Europa
Tue 12/98:10 pmOPO - JFK
1 stop26h 40mAir Europa
Deal found 11/2$399
This United Airlines deal was found by Cheapflights users on 11/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/266:25 pmBOS - OPO
1 stop10h 05mUnited Airlines
Mon 12/112:30 pmOPO - BOS
2 stops30h 35mUnited Airlines
Deal found 11/2$402
This United Airlines deal was found by Cheapflights users on 11/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:21 pmBOS - OPO
2 stops14h 09mUnited Airlines
Tue 12/212:30 pmOPO - BOS
2 stops35h 42mUnited Airlines
Deal found 11/2$403
This United deal was found by Cheapflights users on 11/1. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/98:55 pmBOS - OPO
1 stop31h 35mMultiple Airlines
Tue 11/184:15 pmOPO - BOS
1 stop26h 10mMultiple Airlines
Deal found 11/1$404
This FlightHub deal was found by Cheapflights users on 11/2. 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.
Thu 11/2710:45 pmBOS - OPO
1 stop11h 15mTAP AIR PORTUGAL
Wed 12/38:00 pmOPO - BOS
1 stop29h 10mTAP AIR PORTUGAL
Deal found 11/2$405
This oojo deal was found by Cheapflights users on 11/2. 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.
Tue 11/256:05 pmBOS - OPO
1 stop11h 55mTAP AIR PORTUGAL
Wed 12/36:00 pmOPO - BOS
1 stop31h 10mTAP AIR PORTUGAL
Deal found 11/2$406
This FlightHub deal was found by Cheapflights users on 11/2. 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.
Wed 11/1910:05 pmJFK - OPO
1 stop27h 45mAir Europa
Thu 12/118:10 pmOPO - JFK
1 stop26h 40mAir Europa
Deal found 11/2$409
This United Airlines deal was found by Cheapflights users on 11/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/235:30 amBOS - OPO
2 stops23h 00mUnited Airlines
Wed 12/312:30 pmOPO - BOS
2 stops31h 22mUnited Airlines
Deal found 11/2$409
This United deal was found by Cheapflights users on 11/2. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/259:00 amBOS - OPO
2 stops21h 40mMultiple Airlines
Wed 12/312:10 pmOPO - BOS
1 stop13h 10mMultiple Airlines
Deal found 11/2$413
This Kiwi.com deal was found by Cheapflights users on 11/2. 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.
Thu 11/2710:10 pmBOS - OPO
1 stop32h 00mSWISS
Wed 12/312:10 pmOPO - BOS
1 stop13h 10mSWISS
Deal found 11/2$415
This oojo deal was found by Cheapflights users on 11/2. 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.
Thu 11/1310:45 pmBOS - OPO
1 stop14h 15mTAP AIR PORTUGAL
Thu 11/202:00 pmOPO - BOS
1 stop11h 10mTAP AIR PORTUGAL
Deal found 11/2$418
This Delta deal was found by Cheapflights users on 11/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/268:00 amBOS - OPO
2 stops21h 30mDelta
Wed 12/311:25 amOPO - BOS
2 stops29h 01mDelta
Deal found 11/2$420

Cheap flight deals from USA to Porto

Keep the following information in mind while searching for USA to Porto flight deals. Data was last updated November 3, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$395
(Kiwi.com)

One-way from

$229
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$657

Good round-trip deal

$586 or less

Good one-way deal

$181 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 ($9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 3, 2025.
Use the filters below to find and compare flights from the United States to Porto that are best for you.

Fly from

USA

Fly to

Porto

Route

Depart

Return

Price

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 11/26

6:25 pm-9:30 am

1 stop10h 05m

Porto

Mon 12/1

12:30 pm-2:05 pm

2 stops30h 35m

$402

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Thu 12/4

10:45 pm-10:05 pm

1 stop18h 20m

Porto

Sun 12/7

11:00 am-8:10 pm

1 stop14h 10m

$403

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 11/24

2:21 pm-9:30 am

2 stops14h 09m

Porto

Wed 12/3

12:30 pm-9:27 pm

2 stops37h 57m

$403

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 11/24

2:21 pm-9:30 am

2 stops14h 09m

Porto

Tue 12/2

12:30 pm-7:12 pm

2 stops35h 42m

$403

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 11/9

8:55 pm-9:30 am

1 stop31h 35m

Porto

Tue 11/18

4:15 pm-1:25 pm

1 stop26h 10m

$404

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 11/23

5:30 am-9:30 am

2 stops23h 00m

Porto

Tue 12/2

12:30 pm-7:12 pm

2 stops35h 42m

$409

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Sun 11/23

5:30 am-9:30 am

2 stops23h 00m

Porto

Wed 12/3

12:30 pm-2:52 pm

2 stops31h 22m

$409

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 1/30

6:05 pm-9:50 am

1 stop10h 45m

Porto

Fri 2/6

9:00 am-2:35 pm

1 stop10h 35m

$417

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 11/26

8:00 am-10:30 am

2 stops21h 30m

Porto

Wed 12/3

11:25 am-11:26 am

2 stops29h 01m

$420

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Mon 12/8

10:10 pm-11:15 am

1 stop32h 05m

Porto

Sun 12/14

6:35 pm-8:20 pm

2 stops54h 45m

$425

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 60 results
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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, November is the cheapest month in which you can book a flight from USA to Porto (average of $323). Flying from USA to Porto in June is currently the most expensive (average of $566). 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 November 3, 2025.

It’s optimal to fly from USA to Porto in the evening. By choosing this option you can save up to 7% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from USA to Porto?

Use this chart to determine the cheapest time to fly round-trip from USA to Porto. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their USA to Porto flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

The best insider tips for theUnited States to Porto flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your theUnited States to Porto trip
Airlines
TAP AIR PORTUGAL

TAP's A330NEO offers 2-4-2 seating for more space and comfort on long-haul flights.


TAP's business class provides lie-flat seats and a nice wine list on long-haul flights.

Read more about TAP AIR PORTUGALby Gabriel Leigh
United Airlines

United Polaris offers lie-flat seats and Saks Fifth Avenue bedding on long-haul routes.


United Premium Plus includes extra legroom and upgraded meals on international flights.

Read more about United Airlinesby Harriet Baskas
Delta

Delta One offers 180-degree flat-bed seats with duvets and lumbar pillows on long-haul routes.


Delta Comfort Plus provides extra legroom and upgraded snacks, ideal for international flights.

Read more about Deltaby Harriet Baskas
Iberia

Iberia's Premium Economy offers 37 inches of legroom and noise-canceling headphones on long-haul flights.


Iberia Business Class features lay-flat beds and adjustable pillows for comfort on long-haul flights.

Read more about Iberiaby Emily Zemler
KLM

KLM's Economy Comfort offers 4 extra inches of legroom, enhancing comfort on long-haul flights.


KLM's Premium Economy provides extra width and legroom in a mini-cabin for added comfort.

Read more about KLMby Gabriel Leigh
Azores Airlines

Azores Airlines' Comfort Plus includes 2 oversize checked bags and lounge access.


Azores Airlines offers a stopover option in the Azores for up to 7 days.

Read more about Azores Airlinesby Evie Carrick
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on TAP AIR PORTUGAL and KLM

Gabriel Leigh

Gabriel Leigh

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 Baskas

Harriet Baskas

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 Zemler

Emily Zemler

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

Evie Carrick

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 November 3, 2025.
Read through reviews of airlines operating flights from the United States to Porto, such as Delta, KLM, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

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
8,002 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

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.
KLM
7.7
Good
1,405 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

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
8,998 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

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
2,046 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

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
3,006 reviews
Delta
7.9
Good
8,002 reviews

Boarding

8.2

Overall

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

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 $402, United Airlines can have you in Porto from USA in 10h 05m. 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 Azores Airlines ($274), Iberia ($277), and Lufthansa ($400).

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

    When deciding which route to take from USA to Porto consider New York John F Kennedy Intl - Porto, Newark - Porto or New York LaGuardia - 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, November is the cheapest month in which you can book a flight from USA to Porto (average of $323). Flying from USA to Porto in June is currently the most expensive (average of $566). 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
Aveiro
Arcos de Valdevez
Coimbra
Vila Nova de Gaia

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for USA to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$269Average$624FlexibilityNo cancel feeOn-time77%
SWISSCheapest$338Average$787FlexibilityNo cancel feeOn-time79%
IberiaCheapest$374Average$837FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$374Average$801FlexibilityNo cancel feeOn-time70%
KLMCheapest$394Average$809FlexibilityNo cancel feeOn-time75%
Air EuropaCheapest$395Average$704FlexibilityNo cancel feeOn-time83%
LEVELCheapest$402Average$609FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$434Average$895FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$450Average$979FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$457Average$820FlexibilityNo cancel feeOn-timeN/A

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