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$492+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
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 January 28, 2026.

This United Airlines deal was found by Cheapflights users on 1/27. 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 3/26:30 am
GSP
-
OPO
2 stops22h 00m
United Airlines
Fri 3/136:00 am
OPO
-
GSP
2 stops36h 17m
United Airlines
Deal found 1/27$492
This Delta deal was found by Cheapflights users on 1/27. 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 3/27:20 am
GSP
-
OPO
2 stops22h 10m
Delta
Mon 3/1611:15 am
OPO
-
GSP
2 stops36h 22m
Delta
Deal found 1/27$494
This Delta deal was found by Cheapflights users on 1/27. 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 3/17:40 pm
GSP
-
OPO
2 stops57h 50m
Delta
Mon 3/1611:15 am
OPO
-
GSP
2 stops27h 44m
Delta
Deal found 1/27$496
This KAYAK deal was found by Cheapflights users on 1/27. 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 3/412:05 pm
GSP
-
OPO
2 stops20h 10m
Lufthansa
Fri 3/136:30 am
OPO
-
GSP
2 stops42h 21m
Lufthansa
Deal found 1/27$497
This Delta deal was found by Cheapflights users on 1/27. 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 3/311:36 am
GSP
-
OPO
2 stops17h 54m
Delta
Mon 3/165:00 am
OPO
-
GSP
2 stops33h 59m
Delta
Deal found 1/27$500
This Delta deal was found by Cheapflights users on 1/27. 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 3/411:36 am
GSP
-
OPO
2 stops17h 54m
Delta
Tue 3/1711:25 am
OPO
-
GSP
2 stops27h 34m
Delta
Deal found 1/27$506
This KAYAK deal was found by Cheapflights users on 1/27. 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 3/312:05 pm
GSP
-
OPO
2 stops18h 35m
Lufthansa
Wed 3/186:00 am
OPO
-
GSP
2 stops21h 59m
Lufthansa
Deal found 1/27$508
This Delta deal was found by Cheapflights users on 1/27. 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 3/27:20 am
GSP
-
OPO
2 stops22h 10m
Delta
Wed 3/185:00 am
OPO
-
GSP
2 stops32h 26m
Delta
Deal found 1/27$550
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/286:30 am
GSP
-
OPO
2 stops24h 10m
United Airlines
Tue 3/176:00 am
OPO
-
GSP
2 stops36h 17m
United Airlines
Deal found 1/27$558
This American Airlines deal was found by Cheapflights users on 1/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/148:13 am
GSP
-
OPO
2 stops18h 27m
American Airlines
Sun 4/198:20 am
OPO
-
GSP
2 stops20h 38m
American Airlines
Deal found 1/26$561
This Mytrip deal was found by Cheapflights users on 1/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2810:55 am
GSP
-
OPO
2 stops27h 20m
British Airways
Sun 3/158:05 pm
OPO
-
GSP
2 stops42h 39m
British Airways
Deal found 1/27$562
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/286:30 am
GSP
-
OPO
2 stops24h 10m
United Airlines
Mon 3/1612:30 pm
OPO
-
GSP
2 stops32h 21m
United Airlines
Deal found 1/27$579

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 January 28, 2026.

Round-trip from

$492
(United Airlines)
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 January 28, 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

Mon 3/2

2:51 pm-9:30 am

2 stops13h 39m

Porto

Tue 3/17

6:00 am-10:01 am

2 stops32h 01m

$492

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 3/3

6:30 am-9:30 am

2 stops22h 00m

Porto

Fri 3/13

6:00 am-2:17 pm

2 stops36h 17m

$492

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 3/2

7:20 am-10:30 am

2 stops22h 10m

Porto

Mon 3/16

11:15 am-7:37 pm

2 stops36h 22m

$494

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 3/1

7:40 pm-10:30 am

2 stops57h 50m

Porto

Mon 3/16

11:15 am-10:59 am

2 stops27h 44m

$496

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Wed 3/4

11:36 am-10:30 am

2 stops17h 54m

Porto

Mon 3/16

11:15 am-7:37 pm

2 stops36h 22m

$500

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 3/3

12:05 pm-11:40 am

2 stops18h 35m

Porto

Wed 3/18

6:00 am-11:59 pm

2 stops21h 59m

$508

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Thu 3/5

10:40 am-11:40 am

2 stops20h 00m

Porto

Mon 3/16

12:30 pm-4:51 pm

2 stops32h 21m

$579

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 3/1

6:50 am-9:30 am

2 stops21h 40m

Porto

Tue 3/17

6:00 am-7:28 pm

2 stops17h 28m

$588

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 4/14

10:33 am-9:20 am

2 stops41h 47m

Porto

Tue 4/28

6:00 am-8:47 pm

2 stops19h 47m

$598

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Thu 2/26

12:10 pm-3:25 pm

2 stops22h 15m

Porto

Mon 3/16

5:00 am-9:26 pm

2 stops20h 26m

$600

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 12 results
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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 $555). Flying from Greenville to Porto in June is currently the most expensive (average of $1,082). 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 13h 39m. 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 $555). Flying from Greenville to Porto in June is currently the most expensive (average of $1,082). 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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