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$425+ 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
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
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 February 11, 2026.

This United Airlines deal was found by Cheapflights users on 2/9. 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 4/219:35 am
AUS
-
OPO
2 stops18h 10m
United Airlines
Thu 5/76:00 am
OPO
-
AUS
2 stops39h 41m
United Airlines
Deal found 2/9$497
This American Airlines deal was found by Cheapflights users on 2/10. 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.
Tue 4/213:44 pm
AUS
-
OPO
2 stops18h 16m
American Airlines
Thu 5/78:20 am
OPO
-
AUS
2 stops20h 30m
American Airlines
Deal found 2/10$500
This Delta deal was found by Cheapflights users on 2/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/108:51 am
AUS
-
OPO
2 stops20h 39m
Delta
Tue 3/315:00 am
OPO
-
AUS
2 stops24h 35m
Delta
Deal found 2/8$548
This Expedia deal was found by Cheapflights users on 2/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/105:10 pm
AUS
-
OPO
1 stop16h 35m
Lufthansa
Tue 3/316:00 am
OPO
-
AUS
2 stops20h 43m
Lufthansa
Deal found 2/8$551
This United Airlines deal was found by Cheapflights users on 2/7. 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 3/239:45 am
AUS
-
OPO
2 stops18h 45m
United Airlines
Mon 3/3012:10 pm
OPO
-
AUS
2 stops38h 33m
United Airlines
Deal found 2/7$561
This American Airlines deal was found by Cheapflights users on 2/9. 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.
Mon 4/66:13 am
AUS
-
OPO
2 stops19h 27m
American Airlines
Tue 4/218:20 am
OPO
-
AUS
2 stops20h 30m
American Airlines
Deal found 2/9$578
This United Airlines deal was found by Cheapflights users on 2/9. 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 8/187:15 am
AUS
-
OPO
2 stops17h 35m
United Airlines
Fri 9/256:00 am
OPO
-
AUS
2 stops43h 55m
United Airlines
Deal found 2/9$580
This United Airlines deal was found by Cheapflights users on 2/9. 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 8/1710:11 am
AUS
-
OPO
1 stop14h 44m
United Airlines
Fri 9/256:00 am
OPO
-
AUS
2 stops34h 22m
United Airlines
Deal found 2/9$583
This Lufthansa deal was found by Cheapflights users on 2/9. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/64:05 pm
AUS
-
OPO
1 stop17h 35m
Lufthansa
Tue 4/216:20 am
OPO
-
AUS
2 stops20h 55m
Lufthansa
Deal found 2/9$584
This Air Canada deal was found by Cheapflights users on 2/9. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:46 am
AUS
-
OPO
2 stops19h 14m
Air Canada
Thu 9/2411:50 am
OPO
-
AUS
1 stop14h 05m
Air Canada
Deal found 2/9$588
This United Airlines deal was found by Cheapflights users on 2/9. 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.
Sun 8/169:35 am
AUS
-
OPO
2 stops18h 10m
United Airlines
Thu 9/2411:50 am
OPO
-
AUS
1 stop14h 05m
United Airlines
Deal found 2/9$589

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 February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$497
(United Airlines)

One-way from

$425
(United Airlines)

Popular in

May

Cheapest in

March

Average price

$672
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. 10% potential increase in price ($102 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 11, 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

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

Tue 3/10

8:51 am-10:30 am

2 stops20h 39m

Porto

Tue 3/31

5:00 am-11:35 pm

2 stops24h 35m

$548

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Tue 3/10

5:10 pm-2:45 pm

1 stop16h 35m

Porto

Tue 3/31

4:35 pm-2:00 pm

1 stop27h 25m

$560

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Mon 3/23

9:45 am-9:30 am

2 stops18h 45m

Porto

Mon 3/30

12:10 pm-8:43 pm

2 stops38h 33m

$561

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Mon 4/6

4:05 pm-3:40 pm

1 stop17h 35m

Porto

Tue 4/21

6:20 am-9:15 pm

2 stops20h 55m

$584

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Mon 4/6

4:05 pm-3:40 pm

1 stop17h 35m

Porto

Tue 4/21

12:35 pm-9:07 pm

1 stop14h 32m

$640

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 8/9

12:15 pm-9:45 am

2 stops15h 30m

Porto

Sat 8/22

9:00 am-6:11 pm

1 stop15h 11m

$656

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Mon 3/23

6:00 am-9:30 am

1 stop22h 30m

Porto

Mon 3/30

4:35 pm-8:43 pm

2 stops34h 08m

$662

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sat 6/6

4:57 pm-6:50 am

2 stops31h 53m

Porto

Tue 9/1

12:15 pm-12:00 pm

2 stops29h 45m

$666

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Wed 6/3

6:45 am-7:00 am

2 stops18h 15m

Porto

Tue 9/1

12:15 pm-12:00 pm

2 stops29h 45m

$666

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/8

Showing 1-10 of 18 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 February.
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 $471). 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 February 11, 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
8,180 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

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
8,180 reviews
Delta
7.9
Good
8,180 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

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
1,451 reviews
Delta
7.9
Good
8,180 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

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
9,273 reviews
Delta
7.9
Good
8,180 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

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.
Lufthansa
6.8
Okay
7,777 reviews
Delta
7.9
Good
8,180 reviews

Comfort

7.9

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Crew

8.5

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, Delta, and Lufthansa fly from Austin to Porto in about 16h 35m. The time it takes to get you to your destination can typically vary by up to 4h 04m. 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 41% 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 $471). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Austin to Porto

Discover the top 4 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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$531Average$865FlexibilityNo cancel feeOn-time75%
DeltaCheapest$541Average$840FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$589Average$880FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$668Average$961FlexibilityNo cancel feeOn-time76%

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