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$670+ 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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$670
(United Airlines)

Popular in

July

Cheapest in

March

Average price

$1,092
From Greenville to Porto
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($213 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/11. 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.
Thu 11/139:10 amGSP - OPO
2 stops24h 35mUnited Airlines
Thu 11/2012:30 pmOPO - GSP
2 stops28h 26mUnited Airlines
Deal found 6/11$670
This Delta deal was found by Cheapflights users on 6/11. 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
Thu 8/219:20 amOPO - GSP
2 stops19h 39mDelta
Deal found 6/11$845
This Air France deal was found by Cheapflights users on 6/12. 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.
Sat 8/165:20 pmGSP - OPO
2 stops17h 10mMultiple Airlines
Thu 8/219:20 amOPO - GSP
2 stops16h 09mMultiple Airlines
Deal found 6/12$1,173
This Air Canada deal was found by Cheapflights users on 6/11. 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 8/162:52 pmGSP - OPO
2 stops13h 43mAir Canada
Thu 8/2112:10 pmOPO - GSP
2 stops33h 55mAir Canada
Deal found 6/11$1,539
This KLM deal was found by Cheapflights users on 6/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/165:15 pmGSP - OPO
2 stops17h 15mKLM
Wed 8/209:20 amOPO - GSP
2 stops16h 51mKLM
Deal found 6/10$1,595

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 June 12, 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

Thu 11/13

9:10 am-2:45 pm

2 stops24h 35m

Porto

Thu 11/20

12:30 pm-11:56 am

2 stops28h 26m

$670

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Fri 8/15

4:00 pm-6:10 pm

2 stops21h 10m

Porto

Thu 8/21

9:20 am-11:59 pm

2 stops19h 39m

$845

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sat 8/16

5:20 pm-3:30 pm

2 stops17h 10m

Porto

Thu 8/21

9:20 am-8:29 pm

2 stops16h 09m

$1,173

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sat 8/16

2:52 pm-9:35 am

2 stops13h 43m

Porto

Thu 8/21

12:10 pm-5:05 pm

2 stops33h 55m

$1,539

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sat 8/16

5:15 pm-3:30 pm

2 stops17h 15m

Porto

Wed 8/20

9:20 am-9:11 pm

2 stops16h 51m

$1,595

GreenvillePorto

GSP - OPO

GSPOPO

Greenville

Sat 11/8

5:28 pm-11:45 pm

2 stops25h 17m

$16,965

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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 $1,047). 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 June 12, 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.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

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.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

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).

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 June 12, 2025.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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
9,531 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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
7,136 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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 $670 on this airline. Additional options worth looking into are Delta and Air Canada, starting at $845 and $1,539 round-trip. United Airlines is priced at 30% 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 $1,047). 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
Arcos de Valdevez

Browse thousands of different options on Cheapflights for your next trip

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$577Average$994FlexibilityNo cancel feeOn-timeN/A

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