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$839+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
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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 July 1, 2025.

Round-trip from

$839
(United Airlines)

Popular in

July

Cheapest in

March

Average price

$1,457
From Greenville to Porto
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($231 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($52 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
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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 July 1, 2025.

This United Airlines deal was found by Cheapflights users on 6/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/152:52 pmGSP - OPO
2 stops19h 53mUnited Airlines
Thu 8/219:50 amOPO - GSP
1 stop12h 15mUnited Airlines
Deal found 6/29$839
This Delta deal was found by Cheapflights users on 6/30. 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 8/154:00 pmGSP - OPO
2 stops21h 10mDelta
Wed 8/209:20 amOPO - GSP
2 stops18h 04mDelta
Deal found 6/30$847
This Air France deal was found by Cheapflights users on 6/29. 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.
Fri 8/155:59 pmGSP - OPO
2 stops16h 31mMultiple Airlines
Wed 8/206:15 amOPO - GSP
2 stops20h 21mMultiple Airlines
Deal found 6/29$866
This Air Canada deal was found by Cheapflights users on 6/30. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/166:00 amGSP - OPO
2 stops22h 35mAir Canada
Thu 8/2112:10 pmOPO - GSP
2 stops28h 46mAir Canada
Deal found 6/30$1,149
This Lufthansa deal was found by Cheapflights users on 6/30. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/162:52 pmGSP - OPO
2 stops19h 53mLufthansa
Wed 8/206:00 amOPO - GSP
2 stops17h 52mLufthansa
Deal found 6/30$1,164

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 July 1, 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

Fri 8/15

2:52 pm-3:45 pm

2 stops19h 53m

Porto

Thu 8/21

9:50 am-5:05 pm

1 stop12h 15m

$839

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Fri 8/15

4:00 pm-6:10 pm

2 stops21h 10m

Porto

Wed 8/20

9:20 am-10:24 pm

2 stops18h 04m

$847

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Fri 8/15

5:59 pm-3:30 pm

2 stops16h 31m

Porto

Wed 8/20

6:15 am-9:36 pm

2 stops20h 21m

$866

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sat 8/16

6:00 am-9:35 am

2 stops22h 35m

Porto

Thu 8/21

12:10 pm-11:56 am

2 stops28h 46m

$1,149

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sat 8/16

2:52 pm-3:45 pm

2 stops19h 53m

Porto

Wed 8/20

6:00 am-6:52 pm

2 stops17h 52m

$1,164

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

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, January is the cheapest month in which you can book a flight from Greenville to Porto (average of $523). Flying from Greenville to Porto in June is currently the most expensive (average of $1,033). 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 July 1, 2025.

It’s optimal to fly from Greenville to Porto in the morning. By choosing this option you can save up to 45% on the cost of your flight, compared to a flight at noon.

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 July 1, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and Air Canada 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.
Delta
8.0
Very good
7,973 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,858 reviews
Delta
8.0
Very good
7,973 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,665 reviews
Delta
8.0
Very good
7,973 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Lufthansa
6.8
Okay
7,204 reviews
Delta
8.0
Very good
7,973 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines flying 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 $839 on this airline. Additional options worth looking into are Delta and Air Canada, starting at $847 and $1,149 round-trip. United Airlines is priced at 11% lower than the current average price of a flight leaving 3 months from now.

  • 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, January is the cheapest month in which you can book a flight from Greenville to Porto (average of $523). Flying from Greenville to Porto in June is currently the most expensive (average of $1,033). 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 Greenville?

Book flights to Greenville if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos

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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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$577Average$994FlexibilityNo cancel feeOn-timeN/A

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