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$247+ 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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — OPO
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$560
(United Airlines)

One-way from

$247
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,177
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. 18% potential increase in price ($238 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($53 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/193:00 pmAUS - OPO
1 stop12h 30mUnited Airlines
Wed 11/266:00 amOPO - AUS
2 stops20h 45mUnited Airlines
Deal found 9/10$560
This United Airlines deal was found by Cheapflights users on 9/9. 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 11/237:00 amAUS - OPO
2 stops20h 30mUnited Airlines
Thu 12/116:00 amOPO - AUS
2 stops20h 41mUnited Airlines
Deal found 9/9$564
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1911:40 amAUS - OPO
2 stops19h 35mLufthansa
Wed 11/266:00 amOPO - AUS
2 stops21h 56mLufthansa
Deal found 9/10$576
This United deal was found by Cheapflights users on 9/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/237:00 amAUS - OPO
2 stops20h 30mMultiple Airlines
Wed 12/104:15 pmOPO - AUS
1 stop28h 00mMultiple Airlines
Deal found 9/9$579
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Sun 10/195:42 pmAUS - OPO
2 stops16h 13mAmerican Airlines
Tue 11/48:20 amOPO - AUS
2 stops19h 25mAmerican Airlines
Deal found 9/9$580
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/191:05 pmAUS - OPO
2 stops18h 10mMultiple Airlines
Wed 11/266:00 amOPO - AUS
2 stops36h 19mMultiple Airlines
Deal found 9/10$581
This United deal was found by Cheapflights users on 9/9. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/237:15 amAUS - OPO
2 stops20h 15mMultiple Airlines
Thu 12/1112:05 pmOPO - AUS
3 stops57h 17mMultiple Airlines
Deal found 9/9$583
This United Airlines deal was found by Cheapflights users on 9/9. 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 11/237:00 amAUS - OPO
2 stops20h 30mUnited Airlines
Mon 12/812:30 pmOPO - AUS
2 stops38h 13mUnited Airlines
Deal found 9/9$584

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 September 11, 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

Wed 11/19

3:00 pm-9:30 am

1 stop12h 30m

Porto

Wed 11/26

6:00 am-8:45 pm

2 stops20h 45m

$560

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 11/23

7:00 am-9:30 am

2 stops20h 30m

Porto

Fri 12/12

6:00 am-10:44 pm

2 stops22h 44m

$564

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 11/23

7:00 am-9:30 am

2 stops20h 30m

Porto

Mon 12/8

12:30 pm-2:15 pm

1 stop31h 45m

$579

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Wed 11/19

1:05 pm-1:15 pm

2 stops18h 10m

Porto

Wed 11/26

6:00 am-12:19 pm

2 stops36h 19m

$581

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 11/23

7:15 am-9:30 am

2 stops20h 15m

Porto

Thu 12/11

12:05 pm-3:22 pm

3 stops57h 17m

$583

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 11/23

7:00 am-9:30 am

2 stops20h 30m

Porto

Sat 12/13

6:00 am-8:41 pm

2 stops20h 41m

$614

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 10/19

12:27 pm-9:15 am

2 stops38h 48m

$247

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Fri 10/17

6:02 pm-8:50 am

3 stops56h 48m

$267

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Wed 10/15

1:09 pm-6:45 am

3 stops35h 36m

$293

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sat 10/18

2:14 pm-8:50 am

2 stops36h 36m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 15 results
1
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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, January is the cheapest month in which you can book a flight from Austin to Porto (average of $523). Flying from Austin to Porto in June is currently the most expensive (average of $1,027). 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 September 11, 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 27% on airfare.

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 September 11, 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
8.0
Very good
7,960 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,385 reviews
Delta
8.0
Very good
7,960 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 12h 30m. 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 $597, 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 42% 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, January is the cheapest month in which you can book a flight from Austin to Porto (average of $523). Flying from Austin to Porto in June is currently the most expensive (average of $1,027). 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$597Average$1,073FlexibilityNo cancel feeOn-time75%
DeltaCheapest$662Average$939FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$673Average$1,197FlexibilityNo cancel feeOn-time69%

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