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$597+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
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 February 21, 2026.

This KLM deal was found by Cheapflights users on 2/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:14 pm
GSP
-
OPO
2 stops19h 06m
KLM
Tue 4/145:00 am
OPO
-
GSP
2 stops19h 25m
KLM
Deal found 2/21$597
This American Airlines deal was found by Cheapflights users on 2/19. 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.
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 2/19$646
This United Airlines deal was found by Cheapflights users on 2/19. 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 2/256:30 am
GSP
-
OPO
2 stops22h 00m
United Airlines
Sun 3/112:35 pm
OPO
-
GSP
2 stops35h 49m
United Airlines
Deal found 2/19$754
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/303:00 pm
GSP
-
OPO
1 stop14h 25m
Delta
Fri 10/24:20 pm
OPO
-
GSP
2 stops23h 06m
Delta
Deal found 2/19$766
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:55 pm
GSP
-
OPO
2 stops17h 00m
Delta
Fri 10/24:20 pm
OPO
-
GSP
2 stops23h 06m
Delta
Deal found 2/19$776
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Mon 8/316:46 am
GSP
-
OPO
2 stops19h 14m
United Airlines
Tue 9/2912:15 pm
OPO
-
GSP
2 stops27h 22m
United Airlines
Deal found 2/19$781
This United Airlines deal was found by Cheapflights users on 2/19. 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 8/307:00 am
GSP
-
OPO
2 stops18h 55m
United Airlines
Tue 9/2912:15 pm
OPO
-
GSP
2 stops27h 22m
United Airlines
Deal found 2/19$782
This Delta deal was found by Cheapflights users on 2/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/23:00 pm
GSP
-
OPO
1 stop14h 30m
Delta
Fri 10/24:20 pm
OPO
-
GSP
2 stops23h 06m
Delta
Deal found 2/19$796
This KAYAK deal was found by Cheapflights users on 2/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1211:18 am
GSP
-
OPO
1 stop14h 37m
Lufthansa
Mon 8/249:00 am
OPO
-
GSP
1 stop19h 29m
Lufthansa
Deal found 2/20$798

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 21, 2026.

Round-trip from

$597
(KLM)
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 February 21, 2026.
Use the filters below to find and compare flights from Greenville to Porto that are best for you.

Fly from

Greenville

Fly to

Porto

Route

Depart

Return

Price

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 4/7

6:14 pm-6:20 pm

2 stops19h 06m

Porto

Tue 4/14

5:00 am-7:25 pm

2 stops19h 25m

$597

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 4/14

6:00 am-7:40 am

2 stops20h 40m

Porto

Sun 4/19

8:20 am-11:03 pm

2 stops19h 43m

$646

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Wed 8/12

6:46 am-6:55 am

2 stops19h 09m

Porto

Mon 8/24

9:00 am-9:11 pm

2 stops17h 11m

$754

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Wed 8/12

1:10 pm-3:40 pm

2 stops21h 30m

Porto

Mon 8/24

9:00 am-11:29 pm

1 stop19h 29m

$851

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Wed 8/12

7:45 am-10:30 am

2 stops21h 45m

Porto

Mon 8/24

5:00 am-10:00 pm

2 stops22h 00m

$854

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Thu 3/5

6:30 am-9:30 am

2 stops22h 00m

Porto

Sun 3/8

12:35 pm-9:58 pm

2 stops37h 23m

$917

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Wed 6/3

11:18 am-7:00 am

2 stops14h 42m

Porto

Tue 6/16

12:15 pm-9:17 pm

2 stops38h 02m

$947

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Thu 3/5

12:07 pm-9:30 am

1 stop16h 23m

Porto

Sun 3/8

12:35 pm-11:59 pm

1 stop15h 24m

$951

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 7/6

11:18 am-6:55 am

1 stop14h 37m

Porto

Tue 7/21

9:00 am-11:44 pm

1 stop19h 44m

$955

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

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 $1,081). 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 19h 06m. Fly via KLM, American Airlines, 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 $1,081). 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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