SAT - OPO

Find cheap flights from San Antonio to Porto

1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Antonio to Porto, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Antonio to Porto, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
Multiple Airlines
Thu 10/16
SAT - OPO • multi-stop
Cheapest one-way
Multiple Airlines
Thu 10/16
SAT - OPO • multi-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Antonio to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Antonio to Porto

Multiple Airlines Logo
SAT-OPO
4895 mimulti-stop
Multiple Airlines Logo
OPO-SAT
4895 mimulti-stop
Multiple Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for San Antonio to Porto flights

Get data-powered insights and trends into flights from San Antonio to Porto to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly non-stop between San Antonio and Porto?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from San Antonio to Porto.

There are 2 airlines that fly nonstop from San Antonio to Porto. They are American Airlines and United Airlines. The cheapest airline for this route is American Airlines, with the best round-trip deal found costing $657. On average, the best prices for this route can be found at American Airlines.

Good to know

Low seasonMarch
Best time to beat the crowds with an average 54% drop in price.
Most popular time to fly and prices are also 6% lower on average.

When to book flights from San Antonio to Porto

Are your dates flexible? Find out the best times to travel from San Antonio to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Antonio to Porto

  • Do I need a passport to fly between San Antonio and Porto?

    Yes

  • Which aircraft models fly most regularly from San Antonio to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from San Antonio to Porto?

    oneworld, and Star Alliance are the airline alliances operating flights between San Antonio and Porto, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from San Antonio to Porto, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from San Antonio to Porto are United Airlines and American Airlines. With an average price for the route of $1,207 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $908 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from San Antonio to Porto?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Antonio to Porto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Antonio to Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from San Antonio is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Antonio to Porto?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to San Antonio with another airline. Booking your flights between San Antonio and OPO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Antonio to Porto?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from San Antonio up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from San Antonio to Porto

 
See real verified KAYAK customer reviews for airlines flying from San Antonio to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Antonio to Porto? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8978 reviews
7.7Boarding
7.3Comfort
6.6Food
8.1Crew
7.1Entertainment
Airline reviews

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

6.0 GoodJack, Oct 2025EWR - OPO
Read more United Airlines reviews

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

Crew was excellent. This was a relatively long flight though and had very little leg room, and no entertainment.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

Flight was delayed and missed my connection Lufthansa didn’t respond.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

A little bit more leg room in premium economy. I am 6’4”.

Overall it was good. I missed my connection but I was put on another flight.

Poor seat in rear of aircraft Food at Admiral’s Club Terminal D at DFW inedible

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

We were delayed for a “couple of maintenance issues.” They were resolved rather quickly but a computer glitch caused someone in the airport to have to bring a physical copy of the paperwork so we could leave. I don’t know where they had to drive from to get to our plane but it took forever & we were 1 1/2 hrs late in leaving. The flight itself was fine.

We didn't take off until an hour after we boarded.

The flight was fine. This survey is not. There is no option for N/A so items which don’t apply to my experience still must be rated. In those instances I give a “3” rating which ultimately skews the results.

The actual trip was fine, however, the changes made to our flights and the layovers were had to endure were awful.

Flight from Dallas to OKC was good, but my trip was interrupted due to a delayed flight from Austin to DFW, which happens all the time. I frequently miss my connection from DFW and American can never seem to make this work!

Because the plane was 90 degrees F, they would not let us board. I wish they had, because it meant we were delayed. It's Texas, of course it's hot. We would have survived.

Wish they had the seat-back video screens for watching movies or playing games.

Very good but wish they had the seat-back video screens for movies & games

Everything you need to know for your flight from San Antonio to Porto

Information on your arrival and departure airports

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