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$379+ 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
Aug 20 — Aug 271
Thu 8/20
Thu 8/27
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 July 21, 2026.

This United Airlines deal was found by Cheapflights users on 7/16. 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 12/65:45 pm
GSP
-
OPO
1 stop10h 45m
United Airlines
Wed 12/96:00 am
OPO
-
GSP
2 stops17h 50m
United Airlines
Deal found 7/16$745
This Justfly.com 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:35 pm
GSP
-
OPO
2 stops36h 10m
Lufthansa
Tue 11/176:00 am
OPO
-
GSP
2 stops22h 37m
Lufthansa
Deal found 7/20$757
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/242:51 pm
GSP
-
OPO
2 stops16h 54m
United Airlines
Tue 11/1712:35 pm
OPO
-
GSP
1 stop16h 02m
United Airlines
Deal found 7/20$823
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1811:25 am
GSP
-
OPO
1 stop13h 50m
United Airlines
Mon 8/246:00 am
OPO
-
GSP
2 stops44h 07m
United Airlines
Deal found 7/20$920
This United Airlines deal was found by Cheapflights users on 7/18. 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.
Tue 9/111:25 am
GSP
-
OPO
1 stop13h 50m
United Airlines
Tue 9/812:15 pm
OPO
-
GSP
2 stops31h 05m
United Airlines
Deal found 7/18$926
This Booking.com deal was found by Cheapflights users on 7/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/12:18 pm
GSP
-
OPO
2 stops35h 42m
Air Canada
Tue 9/812:15 pm
OPO
-
GSP
2 stops36h 30m
Air Canada
Deal found 7/18$935
This United Airlines deal was found by Cheapflights users on 7/17. 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 8/3111:25 am
GSP
-
OPO
1 stop17h 20m
United Airlines
Wed 9/96:00 am
OPO
-
GSP
2 stops22h 15m
United Airlines
Deal found 7/17$938
This United Airlines deal was found by Cheapflights users on 7/17. 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 9/97:00 am
GSP
-
OPO
2 stops19h 00m
United Airlines
Thu 9/176:00 am
OPO
-
GSP
2 stops18h 45m
United Airlines
Deal found 7/17$941

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 July 21, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$745
(United Airlines)

One-way from

$379
(Expedia)
Provider with most accurate pricing for Greenville-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Greenville-Porto flights.
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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 July 21, 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
Quickest round-trip

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 12/6

5:45 pm-9:30 am

1 stop10h 45m

Porto

Wed 12/9

6:00 am-6:50 pm

2 stops17h 50m

$745

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sat 10/24

2:51 pm-12:45 pm

2 stops16h 54m

Porto

Tue 11/17

12:35 pm-11:37 pm

1 stop16h 02m

$823

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 8/18

11:25 am-6:15 am

1 stop13h 50m

Porto

Mon 8/24

6:00 am-9:07 pm

2 stops44h 07m

$920

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 8/31

11:25 am-9:45 am

1 stop17h 20m

Porto

Wed 9/9

6:00 am-11:15 pm

2 stops22h 15m

$938

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 9/1

11:25 am-9:45 am

1 stop17h 20m

Porto

Tue 9/8

9:00 am-7:45 pm

1 stop15h 45m

$946
Cheapest one-way

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sat 10/31

5:41 pm-3:20 pm

2 stops41h 39m

$379
Quickest one-way

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sat 10/31

11:53 am-9:30 am

1 stop17h 37m

$398

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sat 10/31

8:24 pm-7:35 pm

3 stops43h 11m

$470

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/18

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 July.
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 10h 45m. Fly via United Airlines to get the fastest option. The distance between Greenville and Porto is about 3901 mi.

  • 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
Arcos de Valdevez
Coimbra
Aveiro

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