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$420+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — AUS
Dec 21 — Dec 281
Sun 12/21
Sun 12/28
1 adult, Economy
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Cheap 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 November 21, 2025.

Round-trip from

$820
(United Airlines)

One-way from

$420
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$1,017
From Porto to Austin Bergstrom
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One-way flight from Porto to Austin Bergstrom
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Highest demand for flights based on searches. 7% potential increase in price ($68 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 21, 2025.

This KLM deal was found by Cheapflights users on 11/19. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:35 amOPO - AUS
1 stop15h 35mMultiple Airlines
Mon 12/81:42 pmAUS - OPO
2 stops14h 48mMultiple Airlines
Deal found 11/19$844
This KLM deal was found by Cheapflights users on 11/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:35 amOPO - AUS
1 stop15h 35mKLM
Thu 12/116:05 pmAUS - OPO
1 stop13h 15mKLM
Deal found 11/20$848
This United Airlines deal was found by Cheapflights users on 11/19. 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 12/246:00 amOPO - AUS
2 stops35h 03mUnited Airlines
Sun 12/286:45 amAUS - OPO
2 stops22h 55mUnited Airlines
Deal found 11/19$870
This Mytrip deal was found by Cheapflights users on 11/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:05 pmOPO - AUS
2 stops30h 03mMultiple Airlines
Thu 12/115:30 amAUS - OPO
3 stops30h 30mMultiple Airlines
Deal found 11/20$877
This United Airlines deal was found by Cheapflights users on 11/20. 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 12/112:35 pmOPO - AUS
2 stops25h 56mUnited Airlines
Wed 12/101:10 pmAUS - OPO
2 stops20h 15mUnited Airlines
Deal found 11/20$910
This Booking.com deal was found by Cheapflights users on 11/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/112:35 pmOPO - AUS
1 stop17h 24mLufthansa
Wed 12/1012:14 pmAUS - OPO
2 stops19h 01mLufthansa
Deal found 11/20$935
This American Airlines deal was found by Cheapflights users on 11/21. 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 12/712:25 pmOPO - AUS
2 stops28h 16mAmerican Airlines
Thu 12/119:59 amAUS - OPO
2 stops15h 41mAmerican Airlines
Deal found 11/21$947
This Delta deal was found by Cheapflights users on 11/21. 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.
Sun 12/711:15 amOPO - AUS
1 stop34h 55mDelta
Thu 12/116:05 pmAUS - OPO
1 stop15h 20mDelta
Deal found 11/21$1,013

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 November 21, 2025.
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

Fri 2/13

6:00 am-8:44 pm

2 stops20h 44m

Austin Bergstrom

Tue 2/17

4:10 pm-2:45 pm

1 stop16h 35m

$820

PortoAustin

OPO - AUS

OPOAUS

Porto

Thu 12/4

6:35 am-4:10 pm

1 stop15h 35m

Austin Bergstrom

Mon 12/8

1:42 pm-10:30 am

2 stops14h 48m

$844

PortoAustin

OPO - AUS

OPOAUS

Porto

Fri 2/13

6:30 am-9:37 pm

2 stops21h 07m

Austin Bergstrom

Tue 2/17

8:10 am-10:30 am

2 stops20h 20m

$846

PortoAustin

OPO - AUS

OPOAUS

Porto

Thu 12/4

6:35 am-4:10 pm

1 stop15h 35m

Austin Bergstrom

Thu 12/11

6:05 pm-1:20 pm

1 stop13h 15m

$848

PortoAustin

OPO - AUS

OPOAUS

Porto

Thu 12/4

6:35 am-4:10 pm

1 stop15h 35m

Austin Bergstrom

Mon 12/8

6:05 pm-3:25 pm

1 stop15h 20m

$850

PortoAustin

OPO - AUS

OPOAUS

Porto

Fri 2/13

4:40 pm-12:55 pm

2 stops26h 15m

Austin Bergstrom

Tue 2/17

6:02 am-7:40 am

2 stops19h 38m

$858

PortoAustin

OPO - AUS

OPOAUS

Porto

Wed 12/24

6:00 am-11:03 am

2 stops35h 03m

Austin Bergstrom

Sun 12/28

6:45 am-11:40 am

2 stops22h 55m

$870

PortoAustin

OPO - AUS

OPOAUS

Porto

Thu 12/4

12:05 pm-12:08 pm

2 stops30h 03m

Austin Bergstrom

Thu 12/11

5:30 am-6:00 pm

3 stops30h 30m

$877

PortoAustin

OPO - AUS

OPOAUS

Porto

Sat 12/6

1:00 pm-9:23 am

3 stops50h 23m

$420

PortoAustin

OPO - AUS

OPOAUS

Porto

Sun 12/7

6:00 am-9:23 am

3 stops33h 23m

$432

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/19

Showing 1-10 of 13 results
1
2

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.

Reviews of airlines servicing Austin

Get insights into the airlines that provide service to Austin. 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 Austin. Reviews last updated November 21, 2025.
Read through reviews of airlines operating flights from Porto to Austin, such as KLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,414 reviews

Entertainment

7.1

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.7

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,414 reviews
KLM
7.7
Good
1,414 reviews

Entertainment

7.1

Food

7.3

Boarding

7.8

Comfort

7.7

Overall

7.7

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

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 20h 44m. The distance from Porto to Austin is about 4829 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Porto to Austin round-trip?

    Currently priced at $809, KLM will fly you from Porto to Austin and back. In addition to KLM, many other airlines offer competitively priced options for your trip. KLM is currently priced 9% below the average price you’ll pay for this route.

  • 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?

Book flights to Austin if you plan to visit one of these locations
Cedar Park
Round Rock
San Marcos
Fredericksburg
Pflugerville
Dripping Springs
Georgetown
Canyon Lake
Seguin
Horseshoe Bay

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Porto to Austin

Discover the top airline that operate flights from Porto to Austin. 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 November 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$809Average$1,055FlexibilityNo cancel feeOn-time75%

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