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$201+ 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — OPO
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
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 July 25, 2026.

This oojo deal was found by Cheapflights users on 7/20. 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.
Sat 10/34:55 pm
LAX
-
OPO
1 stop19h 30m
TAP AIR PORTUGAL
Sat 10/109:15 pm
OPO
-
LAX
1 stop24h 40m
TAP AIR PORTUGAL
Deal found 7/20$649
This Kiwi.com deal was found by Cheapflights users on 7/24. 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 10/1812:30 am
MIA
-
OPO
2 stops31h 00m
Multiple Airlines
Wed 10/2812:25 pm
OPO
-
MIA
1 stop13h 25m
Multiple Airlines
Deal found 7/24$654
This oojo deal was found by Cheapflights users on 7/22. 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 9/224:45 pm
LAX
-
OPO
1 stop16h 25m
TAP AIR PORTUGAL
Tue 9/295:05 am
OPO
-
LAX
1 stop17h 40m
TAP AIR PORTUGAL
Deal found 7/22$656
This oojo deal was found by Cheapflights users on 7/20. 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.
Sat 9/194:55 pm
LAX
-
OPO
1 stop19h 30m
TAP AIR PORTUGAL
Fri 9/257:00 am
OPO
-
LAX
1 stop15h 35m
TAP AIR PORTUGAL
Deal found 7/20$657
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Tue 9/229:35 pm
MIA
-
OPO
1 stop12h 30m
Multiple Airlines
Thu 10/110:30 pm
OPO
-
MIA
2 stops26h 35m
Multiple Airlines
Deal found 7/23$659
This Mytrip deal was found by Cheapflights users on 7/23. 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.
Tue 10/69:35 pm
MIA
-
OPO
1 stop14h 10m
Multiple Airlines
Tue 10/133:00 pm
OPO
-
MIA
2 stops33h 45m
Multiple Airlines
Deal found 7/23$660
This Trip.com deal was found by Cheapflights users on 7/24. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:30 pm
MIA
-
OPO
1 stop12h 45m
Air Europa
Sun 9/274:05 pm
OPO
-
MIA
1 stop31h 40m
Air Europa
Deal found 7/24$662
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Tue 9/229:35 pm
MIA
-
OPO
1 stop14h 10m
Multiple Airlines
Mon 9/2810:30 pm
OPO
-
MIA
2 stops21h 35m
Multiple Airlines
Deal found 7/23$663
This Connections by easyJet deal was found by Cheapflights users on 7/21. 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 Connections by easyJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/811:05 pm
MIA
-
OPO
1 stop27h 35m
Multiple Airlines
Tue 9/159:10 am
OPO
-
MIA
1 stop15h 10m
Multiple Airlines
Deal found 7/21$664
This Kiwi.com deal was found by Cheapflights users on 7/23. 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.
Tue 9/159:35 pm
MIA
-
OPO
1 stop12h 30m
Multiple Airlines
Sun 9/2010:30 pm
OPO
-
MIA
2 stops21h 35m
Multiple Airlines
Deal found 7/23$666
This FlightHub deal was found by Cheapflights users on 7/22. 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.
Tue 10/276:15 pm
LAX
-
OPO
1 stop13h 45m
TAP AIR PORTUGAL
Mon 11/24:00 pm
OPO
-
LAX
1 stop31h 15m
TAP AIR PORTUGAL
Deal found 7/22$668
This Mytrip deal was found by Cheapflights users on 7/21. 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.
Tue 9/811:05 pm
MIA
-
OPO
1 stop14h 50m
Multiple Airlines
Tue 9/2911:20 am
OPO
-
MIA
3 stops37h 25m
Multiple Airlines
Deal found 7/21$669

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 July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$649
(oojo)

One-way from

$201
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$952

Good round-trip deal

$736 or less

Good one-way deal

$404 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. 2% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 25, 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

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 10/28

9:30 am-9:30 am

2 stops20h 00m

Porto

Fri 11/6

6:00 am-9:43 pm

2 stops20h 43m

$681

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 12/2

1:31 pm-9:30 am

2 stops14h 59m

Porto

Sun 12/6

12:35 pm-10:23 am

2 stops26h 48m

$690

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Tue 10/13

6:00 am-7:00 am

2 stops20h 00m

Porto

Sat 11/14

8:40 am-8:20 pm

1 stop16h 40m

$707

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Sun 11/1

7:00 am-9:05 am

1 stop18h 05m

Porto

Tue 11/10

11:15 am-11:45 am

1 stop32h 30m

$733

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 10/28

7:55 pm-10:00 pm

1 stop19h 05m

Porto

Wed 11/4

5:55 am-4:35 pm

1 stop18h 40m

$739

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Wed 8/19

5:40 pm-10:25 am

1 stop11h 45m

Porto

Fri 9/4

5:55 pm-3:35 pm

1 stop26h 40m

$749

Los AngelesPorto

LAX - OPO

LAXOPO

Los Angeles

Wed 10/28

6:40 am-10:35 am

2 stops20h 55m

Porto

Wed 11/4

5:00 am-5:10 pm

2 stops20h 10m

$751

BostonPorto

BOS - OPO

BOSOPO

Boston Logan Intl

Fri 10/16

9:45 pm-3:25 pm

1 stop12h 40m

Porto

Sun 11/15

5:55 am-2:29 pm

1 stop13h 34m

$759

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 12/30

5:20 pm-9:30 am

1 stop11h 10m

Porto

Fri 1/8

6:00 am-2:35 pm

1 stop13h 35m

$767

MiamiPorto

MIA - OPO

MIAOPO

Miami

Fri 9/25

9:30 pm-7:20 pm

1 stop16h 50m

Porto

Tue 9/29

7:35 am-6:45 pm

1 stop16h 10m

$775

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/21

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 $633). Flying from USA to Porto in June is currently the most expensive (average of $1,040). 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 July 25, 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 21% of weekly flights between United States and Porto have experienced delays in the past year, with the average delay time being 173 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?

Monday 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 16% of flights being delayed.

How far ahead should I book a flight from USA to Porto?

The best time to book flights from USA to Porto is 82 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 July 25, 2026.
Read through reviews of airlines operating flights from the United States to Porto, such as KLM,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,545 reviews

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,545 reviews
KLM
7.8
Good
1,545 reviews

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Delta
7.8
Good
8,488 reviews
KLM
7.8
Good
1,545 reviews

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
10,034 reviews
KLM
7.8
Good
1,545 reviews

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
TAP AIR PORTUGAL
7.2
Good
2,345 reviews
KLM
7.8
Good
1,545 reviews

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Lufthansa
6.8
Okay
8,157 reviews
KLM
7.8
Good
1,545 reviews

Food

7.3

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 $733, United Airlines can have you in Porto from USA in 18h 05m. Airlines will cover a distance of 5588 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 Air Canada ($179), United Airlines ($208), and TAP AIR PORTUGAL ($222).

  • 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 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, February is the cheapest month in which you can book a flight from USA to Porto (average of $633). Flying from USA to Porto in June is currently the most expensive (average of $1,040). 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
Arcos de Valdevez
Coimbra
Aveiro

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 July 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
Azores AirlinesCheapest$344Average$827FlexibilityNo cancel feeOn-time74%
LufthansaCheapest$362Average$904FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$363Average$752FlexibilityNo cancel feeOn-time70%
KLMCheapest$366Average$924FlexibilityNo cancel feeOn-time75%
IberiaCheapest$369Average$741FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$375Average$834FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$376Average$895FlexibilityNo cancel feeOn-time69%
SWISSCheapest$383Average$796FlexibilityNo cancel feeOn-time79%
Air EuropaCheapest$392Average$700FlexibilityNo cancel feeOn-time83%
DeltaCheapest$394Average$1,003FlexibilityNo cancel feeOn-timeN/A

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