Flight tickets from San Antonio International (SAT) to Porto (OPO)

Compare San Antonio International to Porto flight deals

Find the cheapest month or even day of the year to fly to Porto

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Find the cheapest month to fly from San Antonio International to Porto

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Antonio International to Porto flights are currently cheapest in June.

San Antonio International to Porto: Alternative routes

Compare routes from San Antonio International to Porto below. You may find an airport to fly into that's cheaper, faster, or easier than Porto.

San Antonio to Porto: Flight information

The things to know before you go.
Cheapest flight found₹ 38,024
Cheapest month to flyJune

Finding cheap flights from San Antonio International to Porto: Frequently asked questions

The best price we found for a return flight from San Antonio International to Porto is ₹ 58,763. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from San Antonio International to Porto. But we found flights with one or more stops from ₹ 58,763.
As of February 2026, there are no flights flying from San Antonio International to Porto.
The cheapest month to fly from San Antonio International to Porto is usually February.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Antonio International Airport to Porto Airport on Wednesday, 25 February 2026.
No airlines currently offer direct flights between San Antonio International Airport and Porto Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Porto but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Porto is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, United offers the cheapest flight tickets to Porto.

Flying from San Antonio International Airport (SAT) to Porto Airport (OPO): what you need to know

  • The timezone in Porto is UTC+0, which is five hours ahead of San Antonio.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are tried-and-true travel tips. Be at the airport with enough time to catch your SAT to OPO flight.

  • During popular months such as July, it's best to get to the airport earlier. Plan to arrive two hours before domestic departures and four hours ahead of international flights when you travel during a high season in general.

  • Explore another city along the way or simply break up your flight with a stopover. Just deselect 'Direct flights only' to see your options when searching for tickets from San Antonio International Airport to Porto Airport. Many passengers pass through Newark Liberty International Airport on this route.

How to find the cheapest flights from San Antonio International Airport (SAT) to Porto Airport (OPO)

  • Currently, ₹ 38,024 is the cheapest price we've seen for a one-way San Antonio International Airport to Porto Airport flight. The best price for a return plane ticket is ₹ 58,763. Keep in mind that fares can change due to demand at the time of booking.

  • It's a good idea to book early if you're looking for cheap tickets from SAT to OPO. That's because flight prices are based on demand, which tends to rise closer to departure.

  • If you're willing to be flexible with your trip dates, try using the 'Whole month' tool. It'll find the lowest price across each month when searching for a flight from San Antonio International Airport to Porto Airport.

  • Getting your hands on cheap flights from SAT to OPO is a piece of cake with Price Alerts. All you need to do is create one of these automatic alerts and we'll let you know as soon as fares go down.

  • Tailor your flights using filters. Choose your ideal arrival and departure times, total journey duration and airlines. You can also sort the results by 'Best,' 'Cheapest' or 'Fastest' flights from San Antonio International Airport to Porto Airport.

Handy information about San Antonio International Airport (SAT)

  • The address for SAT is 9800 Airport Boulevard.

  • San Antonio International Airport earns top marks for on-time performance. 83.17% of flights that depart SAT arrive at their destination on time.

  • San Antonio International Airport is about 19 kilometres from central San Antonio. If you're ride-sharing, catching a cab or driving from the centre, it'll take you 20 minutes or so to arrive, depending on the traffic.

  • Expect a trip time of around 1 hour 30 minutes on public transport.

  • Searching for a handy hotel close to SAT? If you're catching an early flight from San Antonio International Airport to Porto Airport, these stays will have you moments from check-in:

Arriving at Porto Airport (OPO)

  • The last thing you need is a lengthy trip to your hotel if you're landing late on a San Antonio International Airport to Porto Airport flight. Reserve one of these accommodation options near OPO instead:

  • Grab a Porto Airport rental car and discover Porto and beyond with your own set of wheels. Klass Wagen, Goldcar and Drive & Go are popular providers you can book with here.

  • Booking your vehicle from Porto Airport around three weeks ahead can help you secure the lowest rate.

Getting from Porto Airport (OPO) to central Porto

  • Porto Airport is roughly 16 kilometres from central Porto. The drive time takes around 20 minutes.

  • When travelling by public transport, expect a journey time of around 50 minutes.

When to fly to Porto Airport (OPO)

  • August is the busiest month for flights from San Antonio International Airport to Porto Airport. To avoid the crowds, visit Porto in January.

  • Before locking in your flight from San Antonio International Airport to Porto Airport, consider the type of weather you like. August is the warmest month in Porto, with the temperature ranging from 14ºC to 32ºC.

  • If you'd rather travel in cooler conditions, search for a cheap ticket from SAT to OPO in January. Temperatures average between 3ºC and 14ºC then.

Explore more of Portugal

  • Porto has plenty going for it, but there are so many other parts of Portugal you should also see. About 274 kilometres south of Porto, a trip to Lisbon will keep your itinerary packed. Start with leading attractions like Torre de Belem Garden, Estrela At Lisbon - Tram 28 and Archaeological museum of Sao Jorge Castle.

  • Amadora is another well-known destination in Portugal and is around 274 kilometres south of Porto. No trip is complete without dropping by Jardim Porta do Viveiro Alfragide, Jardim Caracol do Victor Alfragide and Jardim e estatua Eduardo Jorge.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.