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$777+ 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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
May 10 — May 171
Sun 5/10
Sun 5/17
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 April 10, 2026.

This United Airlines deal was found by Cheapflights users on 4/9. 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 12/75:15 pm
GSP
-
OPO
2 stops41h 00m
United Airlines
Thu 12/106:00 am
OPO
-
GSP
2 stops20h 11m
United Airlines
Deal found 4/9$777
This Air France deal was found by Cheapflights users on 4/6. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/146:26 pm
GSP
-
OPO
2 stops15h 59m
Multiple Airlines
Sun 4/195:00 am
OPO
-
GSP
2 stops17h 40m
Multiple Airlines
Deal found 4/6$953
This Delta deal was found by Cheapflights users on 4/10. 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 4/141:08 pm
GSP
-
OPO
2 stops21h 17m
Delta
Sun 4/195:00 am
OPO
-
GSP
2 stops22h 46m
Delta
Deal found 4/10$954
This British Airways deal was found by Cheapflights users on 4/8. 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.
Thu 4/911:01 am
GSP
-
OPO
2 stops28h 29m
Multiple Airlines
Wed 4/158:20 am
OPO
-
GSP
2 stops19h 43m
Multiple Airlines
Deal found 4/8$963
This United Airlines deal was found by Cheapflights users on 4/8. 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.
Thu 4/912:07 pm
GSP
-
OPO
1 stop16h 38m
United Airlines
Wed 4/156:00 am
OPO
-
GSP
2 stops17h 59m
United Airlines
Deal found 4/8$991
This United Airlines deal was found by Cheapflights users on 4/10. 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.
Thu 7/166:00 am
GSP
-
OPO
2 stops19h 55m
United Airlines
Wed 7/2211:20 am
OPO
-
GSP
2 stops34h 40m
United Airlines
Deal found 4/10$1,030
This United Airlines deal was found by Cheapflights users on 4/10. 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 7/187:40 pm
GSP
-
OPO
2 stops33h 05m
United Airlines
Fri 7/2412:35 pm
OPO
-
GSP
2 stops26h 20m
United Airlines
Deal found 4/10$1,087

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 April 10, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$1,030
(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 April 10, 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

Thu 7/16

6:00 am-6:55 am

2 stops19h 55m

Porto

Wed 7/22

11:20 am-5:00 pm

2 stops34h 40m

$1,030

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Thu 7/16

6:00 am-6:55 am

2 stops19h 55m

Porto

Fri 7/24

12:35 pm-9:55 am

2 stops26h 20m

$1,136

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Fri 7/17

6:00 am-6:55 am

2 stops19h 55m

Porto

Fri 7/24

12:35 pm-9:55 am

2 stops26h 20m

$1,136

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 7/6

5:41 pm-7:00 am

2 stops56h 19m

Porto

Tue 7/21

12:15 pm-11:34 pm

2 stops40h 19m

$1,205
Quickest round-trip

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 7/6

6:30 am-7:00 am

2 stops19h 30m

Porto

Tue 7/21

12:35 pm-7:08 pm

1 stop11h 33m

$1,242

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Fri 7/17

7:40 pm-11:25 pm

2 stops22h 45m

Porto

Sat 7/25

12:35 pm-11:34 pm

1 stop15h 59m

$1,267

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Thu 5/21

6:35 pm-6:15 pm

2 stops18h 40m

Porto

Thu 5/28

5:00 am-5:53 pm

2 stops17h 53m

$1,284

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 6/28

6:52 pm-10:15 pm

2 stops22h 23m

Porto

Fri 7/10

5:00 am-9:47 pm

2 stops21h 47m

$1,296

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

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, November is the cheapest month in which you can book a flight from Greenville to Porto (average of $545). 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 19h 55m. Fly via United Airlines or Air Canada 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 $545). 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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