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Cheap Flights from San Antonio (SAT) to Porto (OPO)

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      Travellers and cabin class, 1 Adult, Economy

      Compare San Antonio International to Porto flight deals

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

      Book the best Porto fare with no extra fees

      Flight deals from San Antonio International to Porto

      Looking for a cheap last-minute deal or the best return flight from San Antonio International Airport to Porto Airport? If you want to travel next month, return fares start from $1,240. Find the lowest prices on one-way and return tickets right here.
      Porto.$1,090 per passenger.Departing Mon, 30 Nov, returning Mon, 14 Dec.Return flight with Delta.Outbound indirect flight with Delta, departs from San Antonio International on Mon, 30 Nov, arriving in Porto.Inbound indirect flight with Delta, departs from Porto on Mon, 14 Dec, arriving in San Antonio International.Price includes taxes and charges.From $1,090, select.
      Porto.$1,104 per passenger.Departing Sun, 1 Nov, returning Wed, 18 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from San Antonio International on Sun, 1 Nov, arriving in Porto.Inbound indirect flight with Delta, departs from Porto on Wed, 18 Nov, arriving in San Antonio International.Price includes taxes and charges.From $1,104, select.
      Porto.$1,105 per passenger.Departing Sun, 25 Oct, returning Wed, 18 Nov.Return flight with Delta.Outbound indirect flight with Delta, departs from San Antonio International on Sun, 25 Oct, arriving in Porto.Inbound indirect flight with Delta, departs from Porto on Wed, 18 Nov, arriving in San Antonio International.Price includes taxes and charges.From $1,105, select.
      Porto.$1,240 per passenger.Departing Tue, 22 Sep, returning Tue, 29 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from San Antonio International on Tue, 22 Sep, arriving in Porto.Inbound indirect flight with Delta, departs from Porto on Tue, 29 Sep, arriving in San Antonio International.Price includes taxes and charges.From $1,240, select.
      Porto.$1,246 per passenger.Departing Wed, 30 Sep, returning Wed, 7 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from San Antonio International on Wed, 30 Sep, arriving in Porto.Inbound indirect flight with Delta, departs from Porto on Wed, 7 Oct, arriving in San Antonio International.Price includes taxes and charges.From $1,246, select.
      Porto.$1,313 per passenger.Departing Sun, 4 Oct, returning Sun, 11 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from San Antonio International on Sun, 4 Oct, arriving in Porto.Inbound indirect flight with Delta, departs from Porto on Sun, 11 Oct, arriving in San Antonio International.Price includes taxes and charges.From $1,313, select.
      Porto.$1,577 per passenger.Departing Wed, 26 Aug, returning Wed, 2 Sep.Return flight with United.Outbound indirect flight with United, departs from San Antonio International on Wed, 26 Aug, arriving in Porto.Inbound indirect flight with United, departs from Porto on Wed, 2 Sep, arriving in San Antonio International.Price includes taxes and charges.From $1,577, select.
      Porto.$1,759 per passenger.Departing Thu, 27 Aug, returning Mon, 31 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from San Antonio International on Thu, 27 Aug, arriving in Porto.Inbound indirect flight with Delta, departs from Porto on Mon, 31 Aug, arriving in San Antonio International.Price includes taxes and charges.From $1,759, select.

      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 November.
      Aug
      from $1,759
      Sep
      from $1,240
      Oct
      from $1,313
      Nov
      from $1,104
      Dec
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      Jan
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      Feb
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      Mar
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      Apr
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      Jun
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      Jul
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      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.

      Porto

      12km from central Porto
      ClosestCheapest
      from $1,090
      Search flights

      Vila Real

      76km from central Porto
      Search flights

      Viseu G. Lobato

      81km from central Porto
      Search flights

      San Antonio to Porto: Flight information

      The things to know before you go.
      Cheapest flight found$1,090
      Cheapest month to flyNovember

      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 $1,090. 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 $1,090.
      As of August 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 November.
      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 Monday, 30 November 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, Delta offers the cheapest flight tickets to Porto.

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

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

      • Get to the airport on time so you don't miss your SAT to OPO flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid the stress of rushing.

      • During popular months like July, it's a good idea to get to the airport earlier than normal. Arrive two hours before a domestic departure and four hours ahead of an international flight when you fly during a high season in general.

      • Opt for a stopover if you prefer to break up your flight. Simply deselect 'Direct flights only' to see all your options for tickets from San Antonio International Airport to Porto Airport. Frankfurt am Main Airport is a popular stopover on the SAT to OPO route.

      Handy information about San Antonio International Airport (SAT)

      • The address for SAT is 9800 Airport Boulevard.

      • San Antonio International Airport maintains a solid on-time performance, reducing the likelihood of delays. Departures from SAT arrive on schedule 82% of the time.

      • San Antonio International Airport is around 14 kilometres from central San Antonio. If you're driving, ride-sharing or catching a taxi from the centre, it'll take 20 minutes or so to arrive, depending on the traffic.

      • Catching public transport? Expect a journey time of around 50 minutes.

      • Get your travels off to a stress-free start by staying near SAT. Whether you've booked an early flight from San Antonio International Airport to Porto Airport or just don't like being rushed, these stays have you covered:

      Arriving at Porto Airport (OPO)

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

      • Begin your adventure by picking up a Porto Airport rental car. Grab a set of wheels from Klass Wagen, Goldcar or Drive & Go and explore beyond Porto's main sights.

      • To lock in the lowest price, reserve your vehicle from Porto Airport around three weeks ahead.

      Getting from Porto Airport (OPO) to central Porto

      • From Porto Airport, Porto is approximately 11 kilometres away. It takes around 20 minutes to get to the centre driving.

      • It'll take around 30 minutes to get there by public transport.

      When to fly to Porto Airport (OPO)

      • It's time to work out your travel dates for your flight from San Antonio International Airport to Porto Airport. August is the most popular month to visit Porto. If you prefer a quieter vibe, go in March.

      • When reserving your flight from San Antonio International Airport to Porto Airport, consider the kind of weather you like. August is the warmest month in Porto, with the temperature ranging from 14ºC (57ºF) to 32ºC (90ºF).

      • If you want cooler conditions, look for a cheap ticket from SAT to OPO in January. Average temperatures are between 3ºC (37ºF) and 14ºC (57ºF) then.

      Explore more of Portugal

      • You've seen Porto, now it's time to discover other parts of Portugal. Journey about 274 kilometres south to Lisbon to check off its popular sights. From Pasteis de Belém to belém and Real Mosteiro de Santa Maria de Belém, you've got a jam-packed schedule ahead.

      • Around 274 kilometres south of Porto, Amadora is another essential stop in Portugal. Experience this destination's highlights firsthand at Roman Villa, Park Fantasia and Palácio dos Condes da Lousã.

      Plan smart, explore more

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      Plan the rest of your trip from San Antonio to Porto

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.