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$250+ 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — OPO
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap 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 January 27, 2026.

This United Airlines deal was found by Cheapflights users on 1/24. 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 3/24:10 pm
AUS
-
OPO
1 stop11h 20m
United Airlines
Wed 3/186:00 am
OPO
-
AUS
2 stops21h 50m
United Airlines
Deal found 1/24$487
This Air France deal was found by Cheapflights users on 1/25. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/2411:45 am
AUS
-
OPO
2 stops16h 45m
Multiple Airlines
Tue 3/35:00 am
OPO
-
AUS
2 stops22h 24m
Multiple Airlines
Deal found 1/25$494
This United Airlines deal was found by Cheapflights users on 1/25. 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.
Tue 2/244:10 pm
AUS
-
OPO
1 stop11h 20m
United Airlines
Tue 3/312:35 pm
OPO
-
AUS
1 stop14h 21m
United Airlines
Deal found 1/25$496
This United Airlines deal was found by Cheapflights users on 1/26. 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.
Tue 4/2112:15 pm
AUS
-
OPO
2 stops15h 30m
United Airlines
Thu 5/76:00 am
OPO
-
AUS
2 stops39h 41m
United Airlines
Deal found 1/26$497
This United Airlines deal was found by Cheapflights users on 1/25. 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 3/115:30 am
AUS
-
OPO
2 stops28h 55m
United Airlines
Wed 3/1812:35 pm
OPO
-
AUS
1 stop16h 19m
United Airlines
Deal found 1/25$516
This American Airlines deal was found by Cheapflights users on 1/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:44 pm
AUS
-
OPO
2 stops17h 16m
American Airlines
Tue 5/198:20 am
OPO
-
AUS
2 stops20h 30m
American Airlines
Deal found 1/27$609
This United Airlines deal was found by Cheapflights users on 1/25. 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.
Thu 11/128:53 am
AUS
-
OPO
2 stops18h 37m
United Airlines
Sat 11/216:00 am
OPO
-
AUS
2 stops35h 07m
United Airlines
Deal found 1/25$632

Find 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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$487
(United Airlines)

One-way from

$250
(American Airlines)

Popular in

May

Cheapest in

February

Average price

$1,024
Provider with most accurate pricing for Austin Bergstrom-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Austin Bergstrom-Porto flights.
Search Deals
From Austin Bergstrom to Porto
Search Deals
One-way flight from Austin Bergstrom to Porto
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($137 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 27, 2026.
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

Mon 3/2

4:10 pm-9:30 am

1 stop11h 20m

Porto

Wed 3/18

6:00 am-10:50 pm

2 stops21h 50m

$487

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Tue 2/24

11:45 am-10:30 am

2 stops16h 45m

Porto

Tue 3/3

5:00 am-9:24 pm

2 stops22h 24m

$494

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Tue 2/24

4:10 pm-9:30 am

1 stop11h 20m

Porto

Tue 3/3

12:35 pm-8:56 pm

1 stop14h 21m

$496

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Tue 4/21

9:50 am-9:45 am

2 stops17h 55m

Porto

Thu 5/7

6:00 am-11:09 am

2 stops35h 09m

$497

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Wed 3/11

5:30 am-3:25 pm

2 stops28h 55m

Porto

Wed 3/18

12:35 pm-11:54 pm

1 stop16h 19m

$516

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Tue 4/21

10:50 am-9:45 am

1 stop16h 55m

Porto

Thu 5/7

6:00 am-9:24 pm

2 stops21h 24m

$654

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 4/26

4:44 pm-4:00 pm

2 stops17h 16m

$250

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 4/26

4:44 pm-8:00 pm

2 stops21h 16m

$250

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 4/26

12:55 pm-5:20 pm

2 stops22h 25m

$349

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Mon 3/16

4:14 pm-8:10 am

3 stops58h 56m

$351

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 14 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 January.
ProviderPrice AccuracyTrust Score*
AranGrantPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Austin-Porto flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

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 January 27, 2026.
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
8,119 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.8

Overall

7.9

Boarding

8.1

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,119 reviews
Delta
7.9
Good
8,119 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.8

Overall

7.9

Boarding

8.1

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
KLM
7.7
Good
1,443 reviews
Delta
7.9
Good
8,119 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.8

Overall

7.9

Boarding

8.1

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,205 reviews
Delta
7.9
Good
8,119 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.8

Overall

7.9

Boarding

8.1

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 United Airlines fly from Austin to Porto in about 11h 20m. The time it takes to get you to your destination can typically vary by up to . The distance from Austin to Porto is about 4829 mi.

  • 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 43% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Austin to Porto one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $411. Users have also found prices from $554 and $594 on United Airlines and Lufthansa, respectively.

  • 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
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

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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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$531Average$881FlexibilityNo cancel feeOn-time75%
DeltaCheapest$541Average$840FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$623Average$936FlexibilityNo cancel feeOn-time69%

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