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$490+ 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
Jan 6 — Jan 131
Tue 1/6
Tue 1/13
1 adult, Economy
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Cheap flight deals from Greenville to Porto

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 December 7, 2025.

This FlightHub deal was found by Cheapflights users on 12/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/122:55 pmGSP - OPO
2 stops15h 45mLufthansa
Thu 1/226:00 amOPO - GSP
2 stops22h 48mLufthansa
Deal found 12/6$491
This United Airlines deal was found by Cheapflights users on 12/4. 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.
Fri 2/66:35 amGSP - OPO
2 stops24h 05mUnited Airlines
Tue 2/106:00 amOPO - GSP
2 stops37h 19mUnited Airlines
Deal found 12/4$503
This Delta deal was found by Cheapflights users on 12/5. 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 1/285:40 amGSP - OPO
2 stops23h 50mDelta
Tue 2/311:15 amOPO - GSP
2 stops34h 02mDelta
Deal found 12/5$591
This Delta deal was found by Cheapflights users on 12/5. 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 1/285:40 amGSP - OPO
2 stops23h 50mDelta
Thu 2/55:00 amOPO - GSP
2 stops23h 50mDelta
Deal found 12/5$591
This Delta deal was found by Cheapflights users on 12/5. 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 1/278:22 amGSP - OPO
2 stops21h 08mDelta
Fri 2/65:00 amOPO - GSP
2 stops18h 39mDelta
Deal found 12/5$591
This Delta deal was found by Cheapflights users on 12/5. 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 1/2710:06 amGSP - OPO
2 stops19h 24mDelta
Thu 2/55:00 amOPO - GSP
2 stops23h 50mDelta
Deal found 12/5$591
This Delta deal was found by Cheapflights users on 12/5. 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 1/278:22 amGSP - OPO
2 stops21h 08mDelta
Wed 2/411:15 amOPO - GSP
2 stops17h 35mDelta
Deal found 12/5$591
This Delta deal was found by Cheapflights users on 12/5. 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 1/285:40 amGSP - OPO
2 stops23h 50mDelta
Fri 2/65:00 amOPO - GSP
2 stops18h 39mDelta
Deal found 12/5$591
This Delta deal was found by Cheapflights users on 12/5. 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 1/257:46 pmGSP - OPO
2 stops33h 44mDelta
Thu 2/511:15 amOPO - GSP
2 stops17h 35mDelta
Deal found 12/5$593
This Delta deal was found by Cheapflights users on 12/5. 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 1/257:46 pmGSP - OPO
2 stops33h 44mDelta
Fri 2/65:00 amOPO - GSP
2 stops18h 39mDelta
Deal found 12/5$593

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 December 7, 2025.

Round-trip from

$490
(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 December 7, 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

2:55 pm-11:40 am

2 stops15h 45m

Porto

Thu 1/22

6:00 am-11:48 pm

2 stops22h 48m

$491

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Fri 2/6

6:35 am-11:40 am

2 stops24h 05m

Porto

Tue 2/10

6:00 am-2:19 pm

2 stops37h 19m

$503

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Wed 1/28

5:40 am-10:30 am

2 stops23h 50m

Porto

Tue 2/3

11:15 am-4:17 pm

2 stops34h 02m

$591

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Wed 1/28

5:40 am-10:30 am

2 stops23h 50m

Porto

Thu 2/5

5:00 am-11:50 pm

2 stops23h 50m

$591

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 1/27

8:22 am-10:30 am

2 stops21h 08m

Porto

Fri 2/6

5:00 am-6:39 pm

2 stops18h 39m

$591

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 1/27

10:06 am-10:30 am

2 stops19h 24m

Porto

Thu 2/5

5:00 am-11:50 pm

2 stops23h 50m

$591

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Tue 1/27

8:22 am-10:30 am

2 stops21h 08m

Porto

Wed 2/4

11:15 am-11:50 pm

2 stops17h 35m

$591

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Wed 1/28

5:40 am-10:30 am

2 stops23h 50m

Porto

Fri 2/6

5:00 am-6:39 pm

2 stops18h 39m

$591

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 1/25

7:46 pm-10:30 am

2 stops33h 44m

Porto

Thu 2/5

11:15 am-11:50 pm

2 stops17h 35m

$593

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sun 1/25

7:46 pm-10:30 am

2 stops33h 44m

Porto

Fri 2/6

5:00 am-6:39 pm

2 stops18h 39m

$593

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

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 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 December 7, 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 December 7, 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
9,072 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,072 reviews
United Airlines
7.4
Good
9,072 reviews

Food

6.6

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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, 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.

  • 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.

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

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.

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 December 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$619Average$1,017FlexibilityNo cancel feeOn-time69%

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