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$433+ 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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
Mar 28 — Apr 41
Sat 3/28
Sat 4/4
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 February 26, 2026.

This BusinessClass deal was found by Cheapflights users on 2/26. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:42 pm
GSP
-
OPO
2 stops16h 03m
Multiple Airlines
Mon 11/28:40 pm
OPO
-
GSP
2 stops19h 53m
Multiple Airlines
Deal found 2/26$584
This United Airlines deal was found by Cheapflights users on 2/26. 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 10/206:55 pm
GSP
-
OPO
1 stop9h 50m
United Airlines
Mon 11/212:30 pm
OPO
-
GSP
2 stops33h 30m
United Airlines
Deal found 2/26$597
This Delta deal was found by Cheapflights users on 2/26. 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 11/253:42 pm
GSP
-
OPO
2 stops13h 48m
Delta
Mon 12/75:00 am
OPO
-
GSP
2 stops21h 58m
Delta
Deal found 2/26$612
This Delta deal was found by Cheapflights users on 2/23. 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.
Thu 4/96:14 pm
GSP
-
OPO
2 stops20h 01m
Delta
Thu 4/165:00 am
OPO
-
GSP
2 stops22h 46m
Delta
Deal found 2/23$647
This American Airlines deal was found by Cheapflights users on 2/25. 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.
Tue 4/146:00 am
GSP
-
OPO
2 stops20h 40m
American Airlines
Sun 4/198:20 am
OPO
-
GSP
2 stops19h 43m
American Airlines
Deal found 2/25$649
This British Airways deal was found by Cheapflights users on 2/26. 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 4/127:52 am
GSP
-
OPO
2 stops22h 53m
Multiple Airlines
Sun 4/198:20 am
OPO
-
GSP
2 stops19h 43m
Multiple Airlines
Deal found 2/26$664
This United Airlines deal was found by Cheapflights users on 2/26. 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 11/255:15 pm
GSP
-
OPO
2 stops41h 00m
United Airlines
Mon 12/712:30 pm
OPO
-
GSP
3 stops55h 48m
United Airlines
Deal found 2/26$674
This KAYAK deal was found by Cheapflights users on 2/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:18 am
GSP
-
OPO
1 stop17h 27m
Lufthansa
Mon 11/212:35 pm
OPO
-
GSP
1 stop15h 44m
Lufthansa
Deal found 2/26$694
This KAYAK deal was found by Cheapflights users on 2/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/258:45 am
GSP
-
OPO
1 stop19h 45m
Lufthansa
Mon 12/712:30 pm
OPO
-
GSP
2 stops35h 20m
Lufthansa
Deal found 2/26$702
This United Airlines deal was found by Cheapflights users on 2/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:30 am
GSP
-
OPO
2 stops22h 00m
United Airlines
Tue 3/312:35 pm
OPO
-
GSP
2 stops26h 26m
United Airlines
Deal found 2/23$742
This United Airlines deal was found by Cheapflights users on 2/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/127:00 am
GSP
-
OPO
2 stops18h 55m
United Airlines
Mon 8/249:00 am
OPO
-
GSP
2 stops17h 11m
United Airlines
Deal found 2/24$754

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 February 26, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$647
(Delta)

One-way from

$433
(Kiwi.com)
Provider with most accurate pricing for Greenville-Porto flight deals.
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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 February 26, 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

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Thu 4/9

6:14 pm-7:15 pm

2 stops20h 01m

Porto

Thu 4/16

5:00 am-10:46 pm

2 stops22h 46m

$647

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 4/12

7:52 am-11:45 am

2 stops22h 53m

Porto

Sun 4/19

8:20 am-11:03 pm

2 stops19h 43m

$664

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Wed 8/12

7:00 am-6:55 am

2 stops18h 55m

Porto

Mon 8/24

9:00 am-9:11 pm

2 stops17h 11m

$754

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 4/12

5:20 am-7:40 am

2 stops21h 20m

Porto

Sun 4/19

8:20 am-11:03 pm

2 stops19h 43m

$820

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sat 4/11

2:50 pm-3:45 pm

2 stops19h 55m

Porto

Sat 4/18

6:00 am-6:59 pm

2 stops17h 59m

$910

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 6/9

5:41 pm-7:00 am

2 stops32h 19m

Porto

Tue 6/23

12:15 pm-5:00 pm

2 stops33h 45m

$953

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Wed 6/3

6:00 am-7:00 am

2 stops20h 00m

Porto

Tue 6/16

12:15 pm-10:37 am

2 stops27h 22m

$956

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 4/12

6:07 pm-11:50 pm

3 stops48h 43m

$433

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 4/12

6:14 pm-3:25 pm

2 stops16h 11m

$469

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 4/12

12:07 pm-9:45 am

1 stop16h 38m

$3,113

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/26

Sorted by cheapest first
  • 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, April is the cheapest month in which you can book a flight from Greenville to Porto (average of $566). 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 18h 55m. Fly via Delta or United Airlines 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, April is the cheapest month in which you can book a flight from Greenville to Porto (average of $566). 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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