$456+ 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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
GSP — OPO
Oct 1 — Oct 81
Round-trip
1 adult, Economy
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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
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Best
Last-minute
One-way
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 1, 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 1, 2026.
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/712:15 pm -
1 stop16h 15m
Fri 12/116:00 am -
3 stops46h 30m
Deal found 8/27![United Airlines logo]()
$744
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:53 pm -
1 stop9h 52m
Wed 10/286:00 am -
2 stops18h 58m
Deal found 8/27![United Airlines logo]()
$854
This Delta deal was found by Cheapflights users on 8/27. 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.
Mon 10/193:38 pm -
1 stop13h 52m
Fri 10/3011:15 am -
2 stops26h 46m
Deal found 8/27![Delta logo]()
$855
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:35 pm -
2 stops30h 25m
Wed 10/286:00 am -
2 stops31h 30m
Deal found 8/27![United Airlines logo]()
$857
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:35 pm -
2 stops33h 10m
Wed 10/286:00 am -
2 stops18h 58m
Deal found 8/27![United Airlines logo]()
$858
This Delta deal was found by Cheapflights users on 8/27. 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.
Sun 10/185:40 am -
2 stops23h 45m
Tue 10/275:00 am -
2 stops32h 23m
Deal found 8/27![Delta logo]()
$859
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:53 pm -
1 stop9h 52m
Tue 10/2712:35 pm -
1 stop14h 25m
Deal found 8/27![United Airlines logo]()
$862
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 1, 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 1, 2026.
This United Airlines deal was found by Cheapflights users on 8/31. 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 12/75:40 pm -
2 stops34h 50m
Fri 12/116:00 am -
2 stops22h 30m
Deal found 8/31![United Airlines logo]()
$750
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:53 pm -
2 stops31h 07m
Sun 11/16:00 am -
2 stops33h 02m
Deal found 8/27![United Airlines logo]()
$865
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:20 am -
2 stops22h 25m
Tue 10/2712:35 pm -
2 stops25h 16m
Deal found 8/27![United Airlines logo]()
$866
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/174:00 pm -
1 stop12h 45m
Tue 10/2712:35 pm -
1 stop14h 25m
Deal found 8/27![United Airlines logo]()
$912
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/174:00 pm -
1 stop12h 45m
Sun 11/16:00 am -
2 stops33h 02m
Deal found 8/27![United Airlines logo]()
$912
Last-minute flights from Greenville to PortoDiscover last-minute flight deals from Greenville to Porto. Data last updated September 1, 2026 and is based on user searches.
Discover last-minute flight deals from Greenville to Porto. Data last updated September 1, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:47 pm -
2 stops30h 08m
Wed 9/2311:20 am -
2 stops34h 45m
Deal found 8/30![United Airlines logo]()
$1,061
This United Airlines deal was found by Cheapflights users on 8/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:47 pm -
2 stops30h 08m
Tue 9/226:00 am -
2 stops32h 48m
Deal found 8/30![United Airlines logo]()
$1,079
This United Airlines deal was found by Cheapflights users on 8/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/168:29 pm -
1 stop32h 16m
Mon 9/216:00 am -
2 stops32h 35m
Deal found 8/30![United Airlines logo]()
$1,136
This United Airlines deal was found by Cheapflights users on 8/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:30 am -
1 stop14h 25m
Wed 9/2311:20 am -
2 stops34h 45m
Deal found 8/30![United Airlines logo]()
$1,057
This United Airlines deal was found by Cheapflights users on 8/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:30 am -
2 stops23h 15m
Tue 9/2212:15 pm -
2 stops16h 00m
Deal found 8/30![United Airlines logo]()
$1,101
This KAYAK deal was found by Cheapflights users on 8/31. 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.
Thu 9/1711:30 am -
1 stop14h 25m
Mon 9/287:20 pm -
2 stops43h 38m
Deal found 8/31![Multiple Airlines logo]()
$1,125
This KAYAK deal was found by Cheapflights users on 8/27. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:00 am -
1 stop21h 45m
Mon 9/287:20 pm -
2 stops43h 38m
Deal found 8/27![SWISS logo]()
$1,133
One-way flights from Greenville to PortoSearch for one-way flight options from Greenville to Porto. Find affordable one-way fares based on user searches. Data last updated September 1, 2026.
Search for one-way flight options from Greenville to Porto. Find affordable one-way fares based on user searches. Data last updated September 1, 2026.
This Travelocity deal was found by Cheapflights users on 8/27. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:30 am -
2 stops38h 30m
Deal found 8/27![Air Canada logo]()
$456
This Delta deal was found by Cheapflights users on 8/27. 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.
Sun 10/185:40 am -
2 stops23h 45m
Deal found 8/27![Delta logo]()
$463
This United Airlines deal was found by Cheapflights users on 8/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:35 pm -
2 stops33h 10m
Deal found 8/27![United Airlines logo]()
$469
This Delta deal was found by Cheapflights users on 8/27. 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.
Thu 10/225:40 am -
2 stops23h 50m
Deal found 8/27![Delta logo]()
$513
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 September 1, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $744 (United Airlines) |
One-way from | $370 (Kiwi.com) |
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 7,457,451 searches. Data last updated September 1, 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
Cheapest round-trip
GreenvillePorto
GSP Greenville - OPO Porto
GSPOPO
Greenville
Mon 12/7
5:40 pm-9:30 am
2 stops34h 50m
Porto
Fri 12/11
6:00 am-11:30 pm
2 stops22h 30m
$750
GreenvillePorto
GSP Greenville - OPO Porto
GSPOPO
Greenville
Mon 10/19
6:53 pm-7:00 am
2 stops31h 07m
Porto
Sun 11/1
6:00 am-10:02 am
2 stops33h 02m
$865
GreenvillePorto
GSP Greenville - OPO Porto
GSPOPO
Greenville
Sun 10/18
6:20 am-9:45 am
2 stops22h 25m
Porto
Tue 10/27
12:35 pm-9:51 am
2 stops25h 16m
$866
Quickest round-trip
GreenvillePorto
GSP Greenville - OPO Porto
GSPOPO
Greenville
Sat 10/17
4:00 pm-9:45 am
1 stop12h 45m
Porto
Tue 10/27
12:35 pm-11:00 pm
1 stop14h 25m
$912
GreenvillePorto
GSP Greenville - OPO Porto
GSPOPO
Greenville
Sat 10/17
4:00 pm-9:45 am
1 stop12h 45m
Porto
Sun 11/1
6:00 am-10:02 am
2 stops33h 02m
$912
Cheapest one-way
Quickest one-way
GreenvillePorto
GSP Greenville - OPO Porto
GSPOPO
Greenville
Sun 10/18
6:53 pm-9:45 am
1 stop9h 52m
$463
GreenvillePorto
GSP Greenville - OPO Porto
GSPOPO
Greenville
Tue 10/20
11:00 am-10:30 am
1 stop18h 30m
$463
GreenvillePorto
GSP Greenville - OPO Porto
GSPOPO
Greenville
Wed 10/21
4:00 pm-9:45 am
1 stop12h 45m
$463
GreenvillePorto
GSP Greenville - OPO Porto
GSPOPO
Greenville
Thu 10/22
11:00 am-10:30 am
1 stop18h 30m
$513
GreenvillePorto
GSP Greenville - OPO Porto
GSPOPO
Greenville
Fri 10/23
1:45 pm-10:30 am
2 stops15h 45m
$513
Sorted by cheapest first
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.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- 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
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.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Arcos de Valdevez
Coimbra
Aveiro
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