HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Austin

$580+ 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 6/16. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — AUS
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Porto to Austin with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 4, 2026.

This United Airlines deal was found by Cheapflights users on 2/3. 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 2/256:00 am
OPO
-
AUS
2 stops22h 45m
United Airlines
Sun 3/14:10 pm
AUS
-
OPO
1 stop11h 20m
United Airlines
Deal found 2/3$860
This KLM deal was found by Cheapflights users on 2/4. 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.
Sat 2/145:00 am
OPO
-
AUS
1 stop17h 10m
KLM
Mon 3/97:05 pm
AUS
-
OPO
1 stop22h 20m
KLM
Deal found 2/4$866
This American Airlines deal was found by Cheapflights users on 2/2. 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.
Fri 2/68:40 pm
OPO
-
AUS
2 stops18h 56m
American Airlines
Mon 2/97:00 am
AUS
-
OPO
2 stops22h 45m
American Airlines
Deal found 2/2$936
This Mytrip deal was found by Cheapflights users on 2/4. 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.
Sat 2/141:55 pm
OPO
-
AUS
3 stops32h 09m
Multiple Airlines
Mon 3/96:10 am
AUS
-
OPO
3 stops33h 20m
Multiple Airlines
Deal found 2/4$1,186

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 4, 2026.

Round-trip from

$862
(United Airlines)

One-way from

$580
(American Airlines)

Popular in

August

Cheapest in

March

Average price

$945
From Porto to Austin Bergstrom
Search Deals
One-way flight from Porto to Austin Bergstrom
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($21 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 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 4, 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

Wed 2/25

6:00 am-10:45 pm

2 stops22h 45m

Austin Bergstrom

Sun 3/1

4:10 pm-9:30 am

1 stop11h 20m

$860

PortoAustin

OPO - AUS

OPOAUS

Porto

Sat 2/14

5:00 am-4:10 pm

1 stop17h 10m

Austin Bergstrom

Mon 3/9

5:15 pm-3:25 pm

2 stops17h 10m

$866

PortoAustin

OPO - AUS

OPOAUS

Porto

Sat 2/14

1:55 pm-4:04 pm

3 stops32h 09m

Austin Bergstrom

Mon 3/9

6:10 am-8:30 pm

3 stops33h 20m

$1,186

PortoAustin

OPO - AUS

OPOAUS

Porto

Tue 6/16

8:20 am-9:52 pm

2 stops19h 32m

$580

PortoAustin

OPO - AUS

OPOAUS

Porto

Tue 6/16

7:00 pm-4:10 pm

1 stop27h 10m

$877

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

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?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.