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$443+ Cheap flights from Porto (OPO) to Austin (AUS)

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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — AUS
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
1 adult, Economy
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Cheap flight deals from Porto to Austin

Cheapest flights from Porto to Austin
Explore the most affordable flight options available from Porto to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 21, 2026.

This Delta deal was found by Cheapflights users on 2/20. 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 4/65:00 am
OPO
-
AUS
1 stop17h 10m
Delta
Mon 4/133:34 pm
AUS
-
OPO
2 stops20h 21m
Delta
Deal found 2/20$827
This United Airlines deal was found by Cheapflights users on 2/19. 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 6/16:00 am
OPO
-
AUS
2 stops34h 56m
United Airlines
Thu 6/186:04 pm
AUS
-
OPO
2 stops31h 06m
United Airlines
Deal found 2/19$864
This United Airlines deal was found by Cheapflights users on 2/20. 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 5/116:00 am
OPO
-
AUS
2 stops22h 25m
United Airlines
Mon 5/188:29 pm
AUS
-
OPO
2 stops37h 16m
United Airlines
Deal found 2/20$880
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Fri 2/2712:45 pm
OPO
-
AUS
2 stops28h 24m
United Airlines
Tue 3/310:55 am
AUS
-
OPO
2 stops16h 35m
United Airlines
Deal found 2/19$882
This United Airlines deal was found by Cheapflights users on 2/19. 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 6/39:00 am
OPO
-
AUS
1 stop15h 11m
United Airlines
Wed 6/1710:25 am
AUS
-
OPO
1 stop14h 35m
United Airlines
Deal found 2/19$888
This Iberia deal was found by Cheapflights users on 2/18. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/612:25 pm
OPO
-
AUS
2 stops16h 38m
Iberia
Mon 4/1312:16 pm
AUS
-
OPO
2 stops17h 29m
Iberia
Deal found 2/18$921

Find flight deals from Porto to Austin

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) to Austin (AUS). 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 21, 2026.

Round-trip from

$827
(Delta)

One-way from

$443
(Kiwi.com)
From Porto to Austin Bergstrom
Search Deals
One-way flight from Porto to Austin Bergstrom
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Porto to Austin 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 21, 2026.
Use the filters below to find and compare flights from Porto to Austin that are best for you.

Fly from

Porto

Fly to

Austin

Route

Depart

Return

Price

PortoAustin

OPO - AUS

OPOAUS

Porto

Mon 4/6

5:00 am-4:10 pm

1 stop17h 10m

Austin Bergstrom

Mon 4/13

3:34 pm-5:55 pm

2 stops20h 21m

$827

PortoAustin

OPO - AUS

OPOAUS

Porto

Mon 5/11

11:25 am-12:30 am

2 stops19h 05m

Austin Bergstrom

Mon 5/18

6:05 pm-6:10 pm

1 stop18h 05m

$832

PortoAustin

OPO - AUS

OPOAUS

Porto

Mon 5/11

6:00 am-10:25 pm

2 stops22h 25m

Austin Bergstrom

Mon 5/18

8:29 pm-3:45 pm

2 stops37h 16m

$880

PortoAustin

OPO - AUS

OPOAUS

Porto

Wed 6/3

6:20 am-10:53 am

2 stops34h 33m

Austin Bergstrom

Wed 6/17

10:25 am-7:00 am

1 stop14h 35m

$880

PortoAustin

OPO - AUS

OPOAUS

Porto

Wed 6/3

12:35 pm-10:24 pm

1 stop15h 49m

Austin Bergstrom

Wed 6/17

6:40 am-9:45 am

3 stops21h 05m

$885

PortoAustin

OPO - AUS

OPOAUS

Porto

Mon 4/6

12:35 pm-9:34 am

1 stop26h 59m

Austin Bergstrom

Mon 4/13

7:00 am-9:45 am

2 stops20h 45m

$886

PortoAustin

OPO - AUS

OPOAUS

Porto

Mon 6/1

12:35 pm-11:20 pm

1 stop16h 45m

Austin Bergstrom

Thu 6/18

11:35 am-7:10 am

2 stops37h 35m

$961

PortoAustin

OPO - AUS

OPOAUS

Porto

Tue 3/24

11:35 am-12:21 pm

2 stops29h 46m

$498

PortoAustin

OPO - AUS

OPOAUS

Porto

Tue 6/16

8:20 am-11:59 pm

2 stops21h 39m

$550

PortoAustin

OPO - AUS

OPOAUS

Porto

Fri 3/20

10:20 am-3:32 pm

3 stops34h 12m

$657

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 14 results
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Best time to book a flight from Porto to Austin

Have a flexible travel schedule? Discover the best time to fly to Austin from Porto 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.

Related info for your journey

Find useful and relevant information for your journey from Porto to Austin. 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 Porto to Austin?

    Departing from Porto to Austin will take you 17h 10m. The distance from Porto to Austin is about 4829 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

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

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

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

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

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

See more FAQs

Traveling to a place near Austin?

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