How long is the flight from Greenville to Porto?

There are many flights that can get you from Greenville to Porto in 16h 32m. Fly via United Airlines to get the fastest option. The distance between Greenville and Porto is about 3901 mi.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Greenville to Porto as you normally would.

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 >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.

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.

$706+ Cheap Flights from Greenville to Porto

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1. Tell us where you want to go

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Cheap flight deals from Greenville to Porto

Cheapest

Best

Last-minute

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 September 29, 2026.

Tue 11/1011:58 am -

1 stop16h 32m

Tue 11/176:00 am -

2 stops32h 30m

Deal found 9/27

$706

Wed 11/46:20 am -

2 stops22h 10m

Wed 11/1112:35 pm -

2 stops25h 55m

Deal found 9/27

$710

Wed 11/45:00 pm -

2 stops17h 25m

Wed 11/115:00 am -

2 stops21h 33m

Deal found 9/29

$715

Tue 10/2011:30 am -

1 stop17h 15m

Tue 10/276:00 am -

2 stops31h 51m

Deal found 9/29

$990

Wed 11/45:40 am -

1 stop22h 50m

Wed 11/1112:35 pm -

1 stop15h 25m

Deal found 9/26

$1,015

Mon 12/712:15 pm -

1 stop16h 15m

Fri 12/116:00 am -

3 stops46h 40m

Deal found 9/24

$1,078

Best flights from Greenville to Porto
Discover carefully curated flight deals from Greenville to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 29, 2026.

Tue 11/1011:58 am -

1 stop16h 32m

Tue 11/176:00 am -

2 stops32h 30m

Deal found 9/27

$706

Wed 11/45:40 am -

1 stop22h 50m

Wed 11/1112:35 pm -

2 stops25h 55m

Deal found 9/27

$711

Wed 11/46:20 am -

2 stops22h 10m

Wed 11/1112:35 pm -

2 stops25h 55m

Deal found 9/27

$710

Tue 10/2011:30 am -

1 stop17h 15m

Tue 10/276:00 am -

2 stops31h 51m

Deal found 9/29

$990

Mon 12/712:15 pm -

1 stop16h 15m

Fri 12/116:00 am -

3 stops46h 40m

Deal found 9/24

$1,078

Find flight deals from Greenville to Porto

Most accurate provider	Ovago 3 stars
Most trusted provider	Ovago 3 stars
Round-trip from	$706 (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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

GreenvillePorto

GSP Greenville - OPO Porto

GSPOPO

Greenville

Tue 11/10

11:58 am-9:30 am

1 stop16h 32m

Porto

Tue 11/17

6:00 am-9:30 am

2 stops32h 30m

$706

Quickest round-trip

GreenvillePorto

GSP Greenville - OPO Porto

GSPOPO

Greenville

Wed 11/4

6:20 am-9:30 am

2 stops22h 10m

Porto

Wed 11/11

12:35 pm-9:30 am

2 stops25h 55m

$710

GreenvillePorto

GSP Greenville - OPO Porto

GSPOPO

Greenville

Wed 11/4

5:40 am-9:30 am

1 stop22h 50m

Porto

Wed 11/11

12:35 pm-9:30 am

2 stops25h 55m

$711

GreenvillePorto

GSP Greenville - OPO Porto

GSPOPO

Greenville

Tue 10/20

11:30 am-9:45 am

1 stop17h 15m

Porto

Tue 10/27

6:00 am-9:51 am

2 stops31h 51m

$990

GreenvillePorto

GSP Greenville - OPO Porto

GSPOPO

Greenville

Mon 12/7

12:15 pm-9:30 am

1 stop16h 15m

Porto

Fri 12/11

6:00 am-11:40 pm

3 stops46h 40m

$1,078

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/27

Sorted by cheapest first

Compare providers for flights from Greenville to Porto

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Greenville to Porto in September.

Provider	Price Accuracy	Trust Score*
Ovago	Price Accuracy3 stars	Trust Score*3 stars
Expedia	Price Accuracy1 star	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

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 >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.

GSP-OPO

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.

Related info for your journey

How long is the flight from Greenville to Porto?
There are many flights that can get you from Greenville to Porto in 16h 32m. Fly via United Airlines to get the fastest option. The distance between Greenville and Porto is about 3901 mi.
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.

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$706+ 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Greenville to Porto with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Greenville to Porto

Cheapest flights from Greenville to PortoExplore 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 September 29, 2026.

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 September 29, 2026.

Best flights from Greenville to PortoDiscover carefully curated flight deals from Greenville to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 29, 2026.

Discover carefully curated flight deals from Greenville to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 29, 2026.

Last-minute flights from Greenville to PortoDiscover last-minute flight deals from Greenville to Porto. Data last updated September 29, 2026 and is based on user searches.

Discover last-minute flight deals from Greenville to Porto. Data last updated September 29, 2026 and is based on user searches.

Find flight deals from Greenville to Porto

Most accurate provider

Most trusted provider

Round-trip from

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Use the filters below to find and compare flights from Greenville to Porto that are best for you.

Compare providers for flights from Greenville to Porto

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Greenville to Porto in September.

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.

Related info for your journey

How long is the flight from Greenville to Porto?

Can I find deals for flights from Greenville to Porto that include hotel bookings?

How can I find direct flights from Greenville to Porto?

Can I find deals for business class flights from Greenville to Porto?

Traveling to a place near Porto?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Greenville to Porto

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Porto by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Greenville to Porto by cabin class

Find flights from Greenville to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Greenville and Porto flights

Browse other Greenville and Porto flight options. Last updated on September 29, 2026.

Other flights from Greenville

Browse through other flights departing from Greenville. Flights are based on user searches made on Cheapflights and were last updated on September 29, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

Other flights to Porto

Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 29, 2026.

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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 September 29, 2026.

Best flights from Greenville to Porto
Discover carefully curated flight deals from Greenville to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 29, 2026.

Last-minute flights from Greenville to Porto
Discover last-minute flight deals from Greenville to Porto. Data last updated September 29, 2026 and is based on user searches.