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$795+ Cheap flights from Greenville (GSP) to Porto (OPO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
Jul 23 — Jul 301
Thu 7/23
Thu 7/30
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 June 23, 2026.

This United Airlines deal was found by Cheapflights users on 6/19. 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.
Sun 10/255:45 pm
GSP
-
OPO
1 stop11h 45m
United Airlines
Sat 11/76:00 am
OPO
-
GSP
2 stops22h 37m
United Airlines
Deal found 6/19$795
This British Airways deal was found by Cheapflights users on 6/19. 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.
Wed 10/1410:21 am
GSP
-
OPO
2 stops24h 39m
Multiple Airlines
Mon 10/198:40 pm
OPO
-
GSP
2 stops42h 43m
Multiple Airlines
Deal found 6/19$835
This American Airlines deal was found by Cheapflights users on 6/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/252:35 pm
GSP
-
OPO
2 stops13h 05m
American Airlines
Sat 11/78:40 pm
OPO
-
GSP
2 stops19h 53m
American Airlines
Deal found 6/19$845
This KLM deal was found by Cheapflights users on 6/22. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/171:28 pm
GSP
-
OPO
2 stops16h 02m
KLM
Wed 8/265:00 am
OPO
-
GSP
2 stops18h 15m
KLM
Deal found 6/22$881
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:30 am
GSP
-
OPO
1 stop19h 25m
United Airlines
Wed 9/211:20 am
OPO
-
GSP
2 stops28h 17m
United Airlines
Deal found 6/22$888
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:30 am
GSP
-
OPO
2 stops19h 30m
United Airlines
Wed 9/211:20 am
OPO
-
GSP
2 stops28h 17m
United Airlines
Deal found 6/22$891
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:10 am
GSP
-
OPO
2 stops19h 45m
United Airlines
Wed 9/211:20 am
OPO
-
GSP
2 stops28h 17m
United Airlines
Deal found 6/22$893
This Expedia deal was found by Cheapflights users on 6/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/37:49 pm
GSP
-
OPO
2 stops30h 11m
Multiple Airlines
Fri 9/46:00 am
OPO
-
GSP
2 stops40h 02m
Multiple Airlines
Deal found 6/22$898
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:00 am
GSP
-
OPO
1 stop18h 55m
United Airlines
Wed 8/268:55 am
OPO
-
GSP
1 stop15h 50m
United Airlines
Deal found 6/22$899
This United Airlines deal was found by Cheapflights users on 6/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/311:18 am
GSP
-
OPO
1 stop14h 37m
United Airlines
Thu 9/36:00 am
OPO
-
GSP
2 stops22h 11m
United Airlines
Deal found 6/22$900
This FlightHub deal was found by Cheapflights users on 6/22. 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 8/46:10 am
GSP
-
OPO
2 stops19h 50m
Multiple Airlines
Thu 9/36:00 am
OPO
-
GSP
2 stops22h 11m
Multiple Airlines
Deal found 6/22$903
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:59 pm
GSP
-
OPO
2 stops14h 31m
Delta
Fri 9/45:00 am
OPO
-
GSP
2 stops21h 26m
Delta
Deal found 6/22$905

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 June 23, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$795
(United Airlines)
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
Search Deals

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 June 23, 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

Sun 10/25

5:45 pm-9:30 am

1 stop11h 45m

Porto

Sat 11/7

6:00 am-11:37 pm

2 stops22h 37m

$795
Quickest round-trip

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 8/17

1:28 pm-10:30 am

2 stops16h 02m

Porto

Wed 8/26

5:00 am-6:15 pm

2 stops18h 15m

$881

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 8/17

11:25 am-9:45 am

1 stop17h 20m

Porto

Wed 8/26

6:00 am-7:05 pm

2 stops18h 05m

$891

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 8/4

10:59 am-8:30 am

2 stops16h 31m

Porto

Fri 9/4

5:00 am-6:45 pm

2 stops18h 45m

$905

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 7/20

11:42 am-10:30 am

2 stops17h 48m

Porto

Tue 7/28

9:25 am-10:35 pm

2 stops18h 10m

$930

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 8/25

11:25 am-9:45 am

1 stop17h 20m

Porto

Mon 8/31

12:10 pm-9:48 am

2 stops50h 38m

$964

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Thu 9/17

8:29 pm-7:10 am

2 stops29h 41m

Porto

Mon 9/28

6:00 am-9:58 am

2 stops32h 58m

$1,023

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 7/6

11:18 am-9:45 am

1 stop17h 27m

Porto

Tue 7/21

12:15 pm-5:00 pm

2 stops33h 45m

$1,143
Cheapest one-way
Quickest one-way

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Wed 7/22

11:18 am-6:55 am

1 stop14h 37m

$2,600

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

Sorted by cheapest first

Compare providers for flights from Greenville to Porto

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Greenville to Porto in June.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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 >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.

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 11h 45m. Fly via United Airlines or KLM 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.

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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