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$286+ Cheap flights from Austin (AUS) 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — OPO
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheap flight deals from Austin to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Austin (AUS) 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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$634
(Cheapflightsfares)

One-way from

$286
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$806
Provider with most accurate pricing for Austin Bergstrom-Porto flight deals.
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Provider most trusted by Cheapflights users for Austin Bergstrom-Porto flights.
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From Austin Bergstrom to Porto
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One-way flight from Austin Bergstrom to Porto
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Highest demand for flights based on searches. 19% potential increase in price ($240 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($49 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Austin to Porto

Cheapest flights from Austin to Porto
Explore the most affordable flight options available from Austin to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 28, 2025.

This United Airlines deal was found by Cheapflights users on 10/25. 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 12/101:10 pmAUS - OPO
2 stops20h 15mUnited Airlines
Wed 12/176:00 amOPO - AUS
2 stops36h 03mUnited Airlines
Deal found 10/25$658
This Priceline deal was found by Cheapflights users on 10/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2411:30 amAUS - OPO
2 stops18h 35mMultiple Airlines
Mon 12/14:15 pmOPO - AUS
1 stop28h 00mMultiple Airlines
Deal found 10/27$706
This Cheapflightsfares deal was found by Cheapflights users on 10/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/304:10 pmAUS - OPO
1 stop13h 30mLufthansa
Sat 1/106:00 amOPO - AUS
2 stops20h 56mLufthansa
Deal found 10/26$710
This United Airlines deal was found by Cheapflights users on 10/27. 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 11/245:30 amAUS - OPO
2 stops22h 00mUnited Airlines
Mon 12/112:30 pmOPO - AUS
2 stops55h 41mUnited Airlines
Deal found 10/27$724
This United Airlines deal was found by Cheapflights users on 10/27. 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.
Wed 11/192:58 pmAUS - OPO
1 stop12h 32mUnited Airlines
Wed 11/266:00 amOPO - AUS
2 stops23h 59mUnited Airlines
Deal found 10/27$733
This United Airlines deal was found by Cheapflights users on 10/26. 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 11/1212:15 pmAUS - OPO
2 stops15h 15mUnited Airlines
Wed 11/1912:30 pmOPO - AUS
2 stops28h 00mUnited Airlines
Deal found 10/26$737
This Air France deal was found by Cheapflights users on 10/27. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/121:41 pmAUS - OPO
2 stops14h 49mMultiple Airlines
Wed 11/1911:15 amOPO - AUS
2 stops19h 13mMultiple Airlines
Deal found 10/27$741
This Cheapflightsfares deal was found by Cheapflights users on 10/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/61:00 pmAUS - OPO
2 stops17h 50mLufthansa
Tue 11/116:00 amOPO - AUS
2 stops20h 45mLufthansa
Deal found 10/27$772

Cheapflights Fare Finder

 
Customize your flight search to find flights from Austin 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 2,558,603 searches. Data last updated October 28, 2025.
Use the filters below to find and compare flights from Austin to Porto that are best for you.

Fly from

Austin

Fly to

Porto

Route

Depart

Return

Price

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Thu 3/12

1:00 pm-11:40 pm

2 stops29h 40m

Porto

Thu 4/2

6:15 am-6:44 pm

2 stops18h 29m

$634

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Wed 12/10

1:10 pm-3:25 pm

2 stops20h 15m

Porto

Wed 12/17

6:00 am-12:03 pm

2 stops36h 03m

$658

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Tue 12/30

4:10 pm-11:40 am

1 stop13h 30m

Porto

Sat 1/10

6:00 am-8:56 pm

2 stops20h 56m

$710

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Fri 3/27

4:10 pm-9:30 am

1 stop12h 20m

Porto

Tue 3/31

6:00 am-8:56 pm

2 stops20h 56m

$724

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Wed 11/19

4:15 pm-9:30 am

1 stop11h 15m

Porto

Wed 11/26

6:00 am-11:59 pm

2 stops23h 59m

$733

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Wed 11/12

2:59 pm-9:30 am

1 stop12h 31m

Porto

Wed 11/19

12:30 pm-10:30 am

2 stops28h 00m

$733

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Mon 12/8

6:00 am-10:40 am

2 stops46h 40m

$286

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Mon 11/3

6:00 am-5:45 pm

3 stops29h 45m

$432

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 3/15

9:43 am-9:30 am

2 stops18h 47m

$468

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Mon 12/8

6:05 pm-3:25 pm

1 stop15h 20m

$473

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 11 results
1
2

Compare providers for flights from Austin 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 Austin to Porto in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Austin-Porto flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Austin-Porto flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Austin-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Austin-Porto flights, Cheapflights users trust eDreams the most. eDreams 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 Austin-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 Austin to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Austin with our price prediction graph.
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.

Cheapflights Insights

Everything you need to know about your flight from Austin to Porto

What is the cheapest month to book a flight from Austin to Porto?

Currently, March is the cheapest month in which you can book a flight from Austin to Porto (average of $492). Flying from Austin to Porto in July is currently the most expensive (average of $809). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from AUS to OPO?

Find hourly flight availability from Austin to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 28, 2025.

One of the essential ways to save on airfare from Austin to Porto is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 26% on airfare.

How much does it cost to fly round-trip from Austin to Porto?

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated October 28, 2025.
Read through reviews of airlines operating flights from Austin to Porto, such as Delta, KLM, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,995 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,995 reviews
Delta
7.9
Good
7,995 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
KLM
7.7
Good
1,406 reviews
Delta
7.9
Good
7,995 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,996 reviews
Delta
7.9
Good
7,995 reviews

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Austin to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Austin to Porto?

    Airlines like Lufthansa and United Airlines fly from Austin to Porto in about 20h 15m. The time it takes to get you to your destination can typically vary by up to 9h 25m. The distance from Austin to Porto is about 4829 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Austin to Porto round-trip?

    KLM, at $531, was found to be the cheapest airline from Austin to Porto.Alternate airlines to your destination round-trip include Delta and United Airlines. You may be able to fly from Austin to Porto for 47% less than the average price by searching for these airlines.

  • Can I find deals for flights from Austin to Porto that include hotel bookings?

    Yes. In addition to deals on Austin to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Austin to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Austin to Porto.

  • Can I find deals for business class flights from Austin to Porto?

    Yes. Cheapflights offers flight deals from Austin to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Austin to Porto?

    Currently, March is the cheapest month in which you can book a flight from Austin to Porto (average of $492). Flying from Austin to Porto in July is currently the most expensive (average of $809). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Arcos de Valdevez
Coimbra

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Austin to Porto

Discover the top 3 airlines that operate flights from Austin to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$531Average$882FlexibilityNo cancel feeOn-time75%
DeltaCheapest$565Average$939FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$623Average$1,166FlexibilityNo cancel feeOn-time69%

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