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$322+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — OPO
Aug 27 — Sep 31
Thu 8/27
Thu 9/3
1 adult, Economy
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Find cheap flights from Austin to Porto with Cheapflights

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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 July 28, 2026.

This Delta deal was found by Cheapflights users on 7/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:30 am
AUS
-
OPO
1 stop19h 35m
Delta
Wed 12/211:15 am
OPO
-
AUS
1 stop34h 50m
Delta
Deal found 7/24$738
This KLM deal was found by Cheapflights users on 7/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:01 pm
AUS
-
OPO
1 stop15h 24m
KLM
Thu 12/35:00 am
OPO
-
AUS
1 stop17h 05m
KLM
Deal found 7/28$741
This Delta deal was found by Cheapflights users on 7/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2512:20 pm
AUS
-
OPO
2 stops14h 45m
Delta
Thu 12/35:00 am
OPO
-
AUS
1 stop17h 05m
Delta
Deal found 7/24$742
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Sun 12/66:30 am
AUS
-
OPO
1 stop21h 00m
United Airlines
Thu 12/106:00 am
OPO
-
AUS
2 stops18h 44m
United Airlines
Deal found 7/27$746
This Delta deal was found by Cheapflights users on 7/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:30 am
AUS
-
OPO
1 stop19h 35m
Delta
Fri 12/45:00 am
OPO
-
AUS
2 stops18h 39m
Delta
Deal found 7/24$747
This Delta deal was found by Cheapflights users on 7/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:45 pm
AUS
-
OPO
1 stop32h 20m
Delta
Thu 12/35:00 am
OPO
-
AUS
1 stop17h 05m
Delta
Deal found 7/24$749
This United Airlines deal was found by Cheapflights users on 7/28. 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 11/237:00 am
AUS
-
OPO
2 stops20h 30m
United Airlines
Thu 12/36:00 am
OPO
-
AUS
2 stops18h 44m
United Airlines
Deal found 7/28$750
This Delta deal was found by Cheapflights users on 7/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/237:30 am
AUS
-
OPO
2 stops21h 05m
Delta
Fri 12/45:00 am
OPO
-
AUS
2 stops19h 47m
Delta
Deal found 7/24$751
This Delta deal was found by Cheapflights users on 7/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/286:45 pm
AUS
-
OPO
1 stop32h 20m
Delta
Thu 12/35:00 am
OPO
-
AUS
2 stops23h 05m
Delta
Deal found 7/24$753
This United Airlines deal was found by Cheapflights users on 7/24. 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.
Sun 11/227:15 pm
AUS
-
OPO
1 stop32h 15m
United Airlines
Thu 12/312:35 pm
OPO
-
AUS
1 stop15h 10m
United Airlines
Deal found 7/24$761

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 July 28, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$738
(Delta)

One-way from

$322
(Kiwi.com)

Popular in

April

Cheapest in

March

Average price

$1,047
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. 52% potential increase in price ($1,606 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 59% potential price decrease ($540 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 28, 2026.
Use the filters below to find and compare flights from Austin to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Mon 11/23

6:01 pm-3:25 pm

1 stop15h 24m

Porto

Thu 12/3

5:00 am-4:05 pm

1 stop17h 05m

$741

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 12/6

7:00 am-9:30 am

2 stops20h 30m

Porto

Thu 12/10

6:00 am-6:44 pm

2 stops18h 44m

$750
Quickest round-trip

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Tue 10/13

3:59 pm-10:30 am

1 stop12h 31m

Porto

Thu 10/22

5:00 am-4:10 pm

1 stop17h 10m

$828

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Fri 12/25

2:45 pm-10:00 pm

2 stops25h 15m

Porto

Wed 12/30

11:15 am-10:05 pm

2 stops40h 50m

$831

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Mon 9/21

4:05 pm-3:40 pm

1 stop17h 35m

Porto

Mon 9/28

4:35 pm-2:00 pm

1 stop27h 25m

$906

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Fri 12/25

2:47 pm-9:30 am

1 stop12h 43m

Porto

Wed 12/30

6:00 am-12:09 am

2 stops24h 09m

$909

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Wed 9/9

10:40 am-6:55 am

1 stop14h 15m

Porto

Tue 9/15

12:15 pm-4:25 pm

2 stops34h 10m

$912

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Thu 9/17

2:24 pm-7:10 am

3 stops34h 46m

Porto

Thu 9/24

11:50 am-9:58 pm

2 stops40h 08m

$918

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Wed 10/7

2:30 pm-3:25 pm

2 stops18h 55m

Porto

Sat 10/17

5:00 am-4:10 pm

1 stop17h 10m

$922

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Mon 9/14

7:00 am-7:00 am

3 stops18h 00m

Porto

Thu 9/24

6:00 am-6:49 pm

2 stops18h 49m

$927

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 17 resultsSorted by cheapest first
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 July.
ProviderPrice AccuracyTrust Score*
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice 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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Austin-Porto flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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 $562). Flying from Austin to Porto in April is currently the most expensive (average of $7,382). 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.

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

Airfare is below average for this route at the moment.

Austin to Porto flights typically cost between $989 and $1,104 in November.
The cheapest round-trip price found within the last 5 days was $738 on Delta (Nov 25-Dec 2).

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 July 28, 2026.
Read through reviews of airlines operating flights from Austin to Porto, such as KLM,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,550 reviews

Overall

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
KLM
7.8
Good
1,550 reviews
KLM
7.8
Good
1,550 reviews

Overall

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
Delta
7.8
Good
8,483 reviews
KLM
7.8
Good
1,550 reviews

Overall

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
United Airlines
7.4
Good
10,048 reviews
KLM
7.8
Good
1,550 reviews

Overall

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
Lufthansa
6.8
Okay
8,164 reviews
KLM
7.8
Good
1,550 reviews

Overall

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.

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 KLM, United Airlines, and Delta fly from Austin to Porto in about 12h 31m. The time it takes to get you to your destination can typically vary by up to 7h 59m. 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?

    Delta, at $478, was found to be the cheapest airline from Austin to Porto.Alternate airlines to your destination round-trip include KLM and United Airlines. You may be able to fly from Austin to Porto for 67% 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 $562). Flying from Austin to Porto in April is currently the most expensive (average of $7,382). 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
Arcos de Valdevez
Coimbra
Aveiro

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 July 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$478Average$1,072FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$532Average$960FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$581Average$794FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$672Average$1,046FlexibilityNo cancel feeOn-time76%

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