HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$532+ 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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
Apr 28 — May 51
Tue 4/28
Tue 5/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Greenville to Porto with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 March 29, 2026.

This FlightHub deal was found by Cheapflights users on 3/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2112:34 pm
GSP
-
OPO
2 stops29h 16m
Lufthansa
Tue 4/286:00 am
OPO
-
GSP
2 stops21h 45m
Lufthansa
Deal found 3/24$762
This United Airlines deal was found by Cheapflights users on 3/26. 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.
Mon 12/75:41 pm
GSP
-
OPO
2 stops40h 34m
United Airlines
Thu 12/106:00 am
OPO
-
GSP
2 stops20h 11m
United Airlines
Deal found 3/26$876
This KAYAK deal was found by Cheapflights users on 3/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/142:53 pm
GSP
-
OPO
2 stops27h 32m
Lufthansa
Sun 4/196:00 am
OPO
-
GSP
2 stops43h 47m
Lufthansa
Deal found 3/25$911
This Air France deal was found by Cheapflights users on 3/29. 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 4/145:50 pm
GSP
-
OPO
2 stops16h 35m
Multiple Airlines
Sun 4/1911:45 am
OPO
-
GSP
2 stops17h 11m
Multiple Airlines
Deal found 3/29$953
This Delta deal was found by Cheapflights users on 3/27. 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 4/145:50 pm
GSP
-
OPO
2 stops16h 35m
Delta
Sun 4/195:55 am
OPO
-
GSP
2 stops21h 51m
Delta
Deal found 3/27$960
This Delta deal was found by Cheapflights users on 3/26. 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.
Sun 5/107:42 pm
GSP
-
OPO
2 stops17h 28m
Delta
Sun 5/175:00 am
OPO
-
GSP
2 stops21h 38m
Delta
Deal found 3/26$970
This Delta deal was found by Cheapflights users on 3/26. 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.
Tue 5/197:20 am
GSP
-
OPO
2 stops22h 35m
Delta
Wed 8/55:55 am
OPO
-
GSP
2 stops20h 52m
Delta
Deal found 3/26$1,108
This FlightHub deal was found by Cheapflights users on 3/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:33 am
GSP
-
OPO
2 stops41h 47m
Multiple Airlines
Wed 8/52:25 pm
OPO
-
GSP
2 stops35h 52m
Multiple Airlines
Deal found 3/28$1,129
This FlightHub deal was found by Cheapflights users on 3/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/66:30 am
GSP
-
OPO
2 stops19h 30m
Air Canada
Tue 7/2112:15 pm
OPO
-
GSP
2 stops33h 45m
Air Canada
Deal found 3/29$1,135

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 March 29, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$762
(FlightHub)

One-way from

$532
(KLM)
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
One-way flight 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 March 29, 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

Tue 4/14

5:50 pm-3:25 pm

2 stops16h 35m

Porto

Sun 4/19

5:55 am-10:46 pm

2 stops21h 51m

$960

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Mon 5/11

6:35 pm-3:30 pm

2 stops15h 55m

Porto

Mon 5/18

5:00 am-8:13 pm

2 stops20h 13m

$970

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 5/10

7:42 pm-6:10 pm

2 stops17h 28m

Porto

Sun 5/17

5:00 am-9:38 pm

2 stops21h 38m

$970

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 4/14

5:50 pm-3:25 pm

2 stops16h 35m

Porto

Sun 4/19

11:45 am-11:56 pm

2 stops17h 11m

$982

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 5/19

7:20 am-10:55 am

2 stops22h 35m

Porto

Wed 8/5

5:55 am-9:47 pm

2 stops20h 52m

$1,108

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 6/9

6:00 am-7:00 am

2 stops44h 00m

Porto

Tue 6/23

12:15 pm-5:00 pm

2 stops33h 45m

$1,166

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 6/9

5:41 pm-7:00 am

2 stops32h 19m

Porto

Tue 6/23

12:15 pm-9:17 pm

2 stops38h 02m

$1,172

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 5/19

10:33 am-3:45 pm

2 stops24h 12m

Porto

Wed 8/5

2:25 pm-11:13 pm

2 stops37h 48m

$1,200
Quickest round-trip

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 4/21

12:07 pm-9:45 am

1 stop16h 38m

Porto

Tue 4/28

12:35 pm-10:45 pm

1 stop15h 10m

$1,229

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 4/14

12:07 pm-9:45 am

1 stop16h 38m

Porto

Sun 4/19

6:00 am-6:59 pm

2 stops17h 59m

$1,303

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 13 resultsSorted by cheapest first
1
2
  • 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 15h 55m. Fly via Delta or KLM 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Greenville to Porto

See prices for flight routes from nearby airports that may be better suited for you.
Charlotte to Lisbon flights
Charlotte to Porto flights
Greenville to Lisbon flights
Savannah to Lisbon flights
Charlotte to Funchal flights
Columbia to Lisbon flights
Charlotte to Faro flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.