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$578+ Cheap flights from Greenville (GSP) 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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
Apr 23 — Apr 301
Thu 4/23
Thu 4/30
1 adult, Economy
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Cheap flight deals from Greenville to Porto

Cheapest flights from Greenville to Porto
Explore the most affordable flight options available from Greenville to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 24, 2026.

This United Airlines deal was found by Cheapflights users on 3/18. 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.
Sat 12/55:41 pm
GSP
-
OPO
2 stops40h 34m
United Airlines
Wed 12/96:00 am
OPO
-
GSP
2 stops20h 11m
United Airlines
Deal found 3/18$719
This British Airways deal was found by Cheapflights users on 3/19. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/37:52 am
GSP
-
OPO
2 stops27h 08m
Multiple Airlines
Sun 5/108:20 am
OPO
-
GSP
2 stops19h 42m
Multiple Airlines
Deal found 3/19$825
This United Airlines deal was found by Cheapflights users on 3/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/75:15 pm
GSP
-
OPO
2 stops41h 00m
United Airlines
Thu 12/106:00 am
OPO
-
GSP
2 stops38h 18m
United Airlines
Deal found 3/20$831
This Expedia deal was found by Cheapflights users on 3/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:59 pm
GSP
-
OPO
2 stops17h 11m
KLM
Mon 5/117:00 pm
OPO
-
GSP
2 stops43h 04m
KLM
Deal found 3/20$853
This American Airlines deal was found by Cheapflights users on 3/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/310:51 am
GSP
-
OPO
2 stops15h 49m
American Airlines
Sun 5/108:20 am
OPO
-
GSP
2 stops19h 42m
American Airlines
Deal found 3/20$856
This KLM deal was found by Cheapflights users on 3/19. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:23 pm
GSP
-
OPO
2 stops17h 02m
Multiple Airlines
Sat 5/25:55 am
OPO
-
GSP
2 stops21h 18m
Multiple Airlines
Deal found 3/19$893
This United Airlines deal was found by Cheapflights users on 3/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:30 am
GSP
-
OPO
2 stops22h 15m
United Airlines
Sun 4/196:00 am
OPO
-
GSP
2 stops19h 47m
United Airlines
Deal found 3/20$902
This Delta deal was found by Cheapflights users on 3/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:26 pm
GSP
-
OPO
2 stops15h 59m
Delta
Sun 4/195:55 am
OPO
-
GSP
2 stops21h 51m
Delta
Deal found 3/23$910
This United Airlines deal was found by Cheapflights users on 3/19. 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 8/1210:46 am
GSP
-
OPO
2 stops15h 09m
United Airlines
Mon 8/249:00 am
OPO
-
GSP
2 stops14h 59m
United Airlines
Deal found 3/19$913

Find flight deals from Greenville to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Greenville (GSP) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 24, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$825
(British Airways)

One-way from

$578
(Air France)
Provider with most accurate pricing for Greenville-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Greenville-Porto flights.
Search Deals
From Greenville to Porto
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One-way flight from Greenville to Porto
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Greenville 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 24, 2026.
Use the filters below to find and compare flights from Greenville to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Fri 4/24

5:23 pm-3:25 pm

2 stops17h 02m

Porto

Sat 5/2

5:55 am-10:13 pm

2 stops21h 18m

$893

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 4/14

6:30 am-9:45 am

2 stops22h 15m

Porto

Sun 4/19

6:00 am-8:47 pm

2 stops19h 47m

$902

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 4/14

6:26 pm-10:05 pm

2 stops22h 39m

Porto

Sun 4/19

5:55 am-10:46 pm

2 stops21h 51m

$910

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 5/5

2:52 pm-11:10 am

2 stops15h 18m

Porto

Tue 5/12

12:35 pm-9:47 am

2 stops26h 12m

$981

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 6/28

8:52 am-10:40 am

2 stops20h 48m

Porto

Fri 7/10

5:55 am-9:47 pm

2 stops20h 52m

$1,080
Quickest round-trip

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 7/6

7:47 pm-3:25 pm

2 stops14h 38m

Porto

Mon 7/20

5:00 am-8:18 pm

2 stops20h 18m

$1,139

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 7/6

6:00 am-7:00 am

2 stops20h 00m

Porto

Tue 7/21

12:15 pm-9:55 am

2 stops50h 40m

$1,152

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 7/6

7:40 pm-9:45 am

2 stops33h 05m

Porto

Mon 7/20

12:35 pm-9:55 am

2 stops26h 20m

$1,159

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 6/28

5:41 pm-7:00 am

2 stops32h 19m

Porto

Sun 7/5

9:00 am-2:20 pm

2 stops34h 20m

$1,169
Cheapest one-way
Quickest one-way

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 5/3

5:23 pm-3:25 pm

2 stops17h 02m

$578

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/19

Showing 1-10 of 11 resultsSorted by cheapest first
1
2
  • Most accurate provider: When it comes to deals on Greenville-Porto flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Greenville-Porto flight deals on Cheapflights vs. Ovago 90-95% of the time. Price accuracy is based on data collected from Greenville-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Greenville-Porto flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Greenville-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Greenville to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Greenville 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 Greenville to Porto

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

Currently, November is the cheapest month in which you can book a flight from Greenville to Porto (average of $545). Flying from Greenville to Porto in June is currently the most expensive (average of $975). 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.

Related info for your journey

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

  • How long is the flight from Greenville to Porto?

    There are many flights that can get you from Greenville to Porto in 22h 15m. Fly via United Airlines or Delta to get the fastest option. The distance between Greenville and Porto is about 3901 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Greenville 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 Greenville to Porto?

    Currently, November is the cheapest month in which you can book a flight from Greenville to Porto (average of $545). Flying from Greenville to Porto in June is currently the most expensive (average of $975). 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

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