$419 Cheap Flights from Greenville (GSP) to Porto (OPO)

View $419 flight on Thu, Jan 15, 2026Opens in a new window

Popular airlines from Greenville-Spartanburg Intl. Airport (GSP) to Porto Airport (OPO)

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Cheap Flights from Greenville to Porto (GSP-OPO)

Prices were available within the past 7 days and start at $419 for one-way flights and $488 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Nov 27 - Mon, Dec 8
GSP
Greenville
OPO
Porto
$488 Roundtrip, found 3 days ago
$488
Roundtrip
found 3 days ago
Select United flight, departing Thu, Nov 27 from Greenville to Porto, returning Mon, Dec 8, priced at $488 found 3 days ago
United
Sat, Nov 29 - Sun, Dec 14
GSP
Greenville
OPO
Porto
$489 Roundtrip, found 3 days ago
$489
Roundtrip
found 3 days ago
Select United flight, departing Sat, Nov 29 from Greenville to Porto, returning Sun, Dec 14, priced at $489 found 3 days ago
Delta
Fri, Nov 28 - Tue, Dec 9
GSP
Greenville
OPO
Porto
$491 Roundtrip, found 3 days ago
$491
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Nov 28 from Greenville to Porto, returning Tue, Dec 9, priced at $491 found 3 days ago
Delta
Wed, Dec 3 - Mon, Dec 15
GSP
Greenville
OPO
Porto
$498 Roundtrip, found 3 days ago
$498
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Dec 3 from Greenville to Porto, returning Mon, Dec 15, priced at $498 found 3 days ago
United
Tue, Dec 30 - Thu, Jan 15
GSP
Greenville
OPO
Porto
$503 Roundtrip, found 3 days ago
$503
Roundtrip
found 3 days ago
Select United flight, departing Tue, Dec 30 from Greenville to Porto, returning Thu, Jan 15, priced at $503 found 3 days ago
United
Thu, Jan 8 - Tue, Jan 20
GSP
Greenville
OPO
Porto
$504 Roundtrip, found 4 days ago
$504
Roundtrip
found 4 days ago
Select United flight, departing Thu, Jan 8 from Greenville to Porto, returning Tue, Jan 20, priced at $504 found 4 days ago
Lufthansa
Thu, Jan 15 - Mon, Jan 19
GSP
Greenville
OPO
Porto
$504 Roundtrip, found 17 hours ago
$504
Roundtrip
found 17 hours ago
Select Lufthansa flight, departing Thu, Jan 15 from Greenville to Porto, returning Mon, Jan 19, priced at $504 found 17 hours ago
Lufthansa
Thu, Jan 15 - Mon, Jan 19
GSP
Greenville
OPO
Porto
$507 Roundtrip, found 17 hours ago
$507
Roundtrip
found 17 hours ago
Select Lufthansa flight, departing Thu, Jan 15 from Greenville to Porto, returning Mon, Jan 19, priced at $507 found 17 hours ago
Virgin Atlantic
Fri, Dec 5 - Mon, Dec 15
GSP
Greenville
OPO
Porto
$517 Roundtrip, found 3 days ago
$517
Roundtrip
found 3 days ago
Select Virgin Atlantic flight, departing Fri, Dec 5 from Greenville to Porto, returning Mon, Dec 15, priced at $517 found 3 days ago
KLM
Sat, Dec 6 - Wed, Dec 24
GSP
Greenville
OPO
Porto
$536 Roundtrip, found 4 days ago
$536
Roundtrip
found 4 days ago
Select KLM flight, departing Sat, Dec 6 from Greenville to Porto, returning Wed, Dec 24, priced at $536 found 4 days ago

Alternative airports near Porto

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Dr. Francisco de Sa Carneiro OPO. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $1,172
OPO
Dr. Francisco de Sa Carneiro
CheapestClosest
Average driving time to city center14 min
Flights from $1,172

Frequently asked questions

How much does a flight from Greenville-Spartanburg Intl. Airport (GSP) to Dr. Francisco de Sa Carneiro Airport (OPO) cost?
Secure a cheap one-way flight from $419 or cheap return flight from $488 from Greenville-Spartanburg Intl. Airport (GSP) to Dr. Francisco de Sa Carneiro Airport (OPO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Greenville-Spartanburg Intl. Airport (GSP) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Flying in November is a great way to save, as it's the cheapest month for flights between GSP and OPO. You'll often find the lowest fares during off-peak months.
What is the cheapest airline that flies from Greenville-Spartanburg Intl. Airport (GSP) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from GSP to OPO. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from Greenville-Spartanburg Intl. Airport (GSP) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Direct flights from Greenville-Spartanburg Intl. Airport (GSP) to Dr. Francisco de Sa Carneiro Airport (OPO) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from GSP to OPO?
Generally you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* But this can vary based on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Greenville-Spartanburg Intl. Airport (GSP) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Choose a flight from Greenville-Spartanburg Intl. Airport (GSP) to Dr. Francisco de Sa Carneiro Airport (OPO) that takes off before 3 PM to reduce the risk of delays and cancellations. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Greenville-Spartanburg Intl. Airport (GSP) to Dr. Francisco de Sa Carneiro Airport (OPO) last-minute?
Waiting until just before your departure to book a flight from GSP to OPO generally means paying more. While you may come across some last-minute discounts, they aren't always guaranteed. Keep your travel schedule open to boost your chances of snagging a bargain.
Is it cheaper to book a GSP to OPO flight and hotel package?
Compared with arranging hotels and flights separately, booking a GSP to OPO flight and hotel package with Expedia could lead to significant savings. What's more, having it all in one place will take the hassle out of planning your trip. Just secure your flights and select from our wide range of hotels, then tailor your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Greenville-Spartanburg Intl. Airport (GSP) to Dr. Francisco de Sa Carneiro Airport (OPO)?
In most instances, you can cancel or reschedule your GSP to OPO flight. However, additional fees may apply, especially if you booked over 24 hours ago. Double-check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like more information, visit our Customer Service portal.

Travel information

Origin airport
Greenville-Spartanburg Intl.
Destination airport
Dr. Francisco de Sa Carneiro
Airlines serving
American Airlines, British Airways, Brussels Airlines, Delta, KLM, Lufthansa, United
Roundtrip price
$488
Distance
3904 mi

Book with confidence

Greenville to Porto Flights

The cheapest times to fly from Greenville to Porto

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Greenville to Porto are during the month of November. You can find some of the cheapest flights from Greenville to Porto with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Greenville to Porto

Sunday is one of the best days to book for cheap flights from Greenville to Porto: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Greenville to Porto

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Greenville to Porto in 2025. You can also book with separate airlines for your outbound and return journeys, from $419 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Greenville to Porto flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Greenville to Porto airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Greenville to Porto Flights

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*Available to One Key members.