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$488+ 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
Dec 21 — Dec 281
Sun 12/21
Sun 12/28
1 adult, Economy
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Find 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 November 21, 2025.

This Delta deal was found by Cheapflights users on 11/19. 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.
Fri 12/55:35 amGSP - OPO
2 stops23h 55mDelta
Tue 12/96:05 amOPO - GSP
2 stops20h 37mDelta
Deal found 11/19$691
This American Airlines deal was found by Cheapflights users on 11/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/51:50 pmGSP - OPO
2 stops12h 50mAmerican Airlines
Tue 12/98:20 amOPO - GSP
2 stops18h 25mAmerican Airlines
Deal found 11/18$909

Cheap 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 November 21, 2025.

Round-trip from

$488
(FlightHub)
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 November 21, 2025.
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 1/12

11:49 am-11:40 am

2 stops18h 51m

Porto

Thu 1/22

6:00 am-8:47 pm

2 stops19h 47m

$488

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Fri 2/6

2:55 pm-11:40 am

2 stops15h 45m

Porto

Tue 2/10

6:00 am-11:48 pm

2 stops22h 48m

$503

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 1/12

2:55 pm-11:40 am

2 stops15h 45m

Porto

Thu 1/22

6:00 am-11:48 pm

3 stops22h 48m

$507

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Fri 12/5

5:35 am-10:30 am

2 stops23h 55m

Porto

Tue 12/9

6:05 am-9:42 pm

2 stops20h 37m

$691

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Fri 12/5

1:50 pm-7:40 am

2 stops12h 50m

Porto

Tue 12/9

8:20 am-9:45 pm

2 stops18h 25m

$909

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 3/2

12:05 pm-9:30 am

1 stop16h 25m

Porto

Fri 3/6

6:00 am-9:06 pm

2 stops20h 06m

$1,109

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 1/4

11:55 am-11:40 am

2 stops18h 45m

Porto

Sun 1/11

1:45 pm-8:47 pm

2 stops60h 02m

$1,189

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 1/4

1:05 pm-1:00 pm

3 stops18h 55m

Porto

Sun 1/11

6:55 am-11:48 pm

3 stops21h 53m

$2,010

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Thu 5/14

9:33 am-7:25 am

3 stops40h 52m

$539

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Fri 5/15

7:59 am-8:00 pm

2 stops31h 01m

$706

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 11 results
1
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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 $1,081). 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.

What is the cheapest time of day to fly from GSP to OPO?

Find hourly flight availability from Greenville to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 21, 2025.

It’s optimal to fly from Greenville to Porto at noon. By choosing this option you can save up to 44% on the cost of your flight, compared to a flight in the afternoon.

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated November 21, 2025.
Read reviews from past customers who have flown United Airlines from Greenville to Porto. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,029 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,029 reviews
United Airlines
7.4
Good
9,029 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 15h 45m. Fly via Lufthansa 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.

  • What is the cheapest airline to fly from Greenville to Porto round-trip?

    Our cheapest airline available from Greenville to Porto is United Airlines. Our recent data shows that you can find tickets from as low as $619 on this airline.

  • 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 $1,081). 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
Aveiro
Arcos de Valdevez
Coimbra
Vila Nova de Gaia

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Top airline flying from Greenville to Porto

Discover the top airline that operate flights from Greenville to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$619Average$1,017FlexibilityNo cancel feeOn-time69%

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