How long is the flight from Austin to Porto?

Airlines like KLM and United Airlines fly from Austin to Porto in about 15h. The time it takes to get you to your destination can typically vary by up to 8h 10m. 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?

KLM, at $531, 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 41% less than the average price by searching for these airlines.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

What are the most popular airlines that fly from Austin to Porto?

Consider United Airlines, KLM or Delta when booking your flight. These represent the most popular airlines when flying from Austin to Porto.

Most accurate provider : When it comes to deals on Austin-Porto flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Austin-Porto flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

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.

$482+ Flights from Austin to Porto

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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 December 12, 2025.

Tue 12/304:10 pmAUS - OPO

1 stop13h 30mLufthansa

Sat 1/101:45 pmOPO - AUS

2 stops30h 30mLufthansa

Deal found 12/9

$1,121

Tue 12/305:22 pmAUS - OPO

2 stops16h 03mKLM

Sat 1/105:00 amOPO - AUS

2 stops21h 54mKLM

Deal found 12/11

$1,213

Tue 12/306:25 amAUS - OPO

2 stops22h 05mDelta

Sat 1/105:00 amOPO - AUS

2 stops23h 14mDelta

Deal found 12/10

$1,327

Best flights from Austin to Porto
Discover carefully curated flight deals from Austin to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

Fri 1/2311:45 amAUS - OPO

2 stops16h 45mMultiple Airlines

Fri 1/304:10 pmOPO - AUS

1 stop30h 00mMultiple Airlines

Deal found 12/9

$482

Sun 1/256:25 pmAUS - OPO

2 stops15h 00mKLM

Sun 2/14:10 pmOPO - AUS

1 stop30h 00mKLM

Deal found 12/11

$488

Fri 1/236:30 amAUS - OPO

3 stops23h 10mUnited Airlines

Fri 1/3012:30 pmOPO - AUS

2 stops38h 26mUnited Airlines

Deal found 12/9

$526

Fri 1/306:00 amAUS - OPO

2 stops23h 45mIberia

Tue 2/38:20 amOPO - AUS

2 stops20h 40mIberia

Deal found 12/8

$738

Fri 1/309:50 amAUS - OPO

3 stops19h 10mUnited Airlines

Tue 2/36:00 amOPO - AUS

2 stops21h 25mUnited Airlines

Deal found 12/9

$808

Sun 1/251:05 pmAUS - OPO

2 stops17h 45mMultiple Airlines

Sun 2/16:00 amOPO - AUS

3 stops47h 24mMultiple Airlines

Deal found 12/11

$842

Last-minute flights from Austin to Porto
Discover last-minute flight deals from Austin to Porto. Data last updated December 12, 2025 and is based on user searches.

Tue 12/304:10 pmAUS - OPO

1 stop13h 30mLufthansa

Sat 1/101:45 pmOPO - AUS

2 stops30h 30mLufthansa

Deal found 12/9

$1,121

Fri 1/2311:45 amAUS - OPO

2 stops16h 45mMultiple Airlines

Fri 1/304:10 pmOPO - AUS

1 stop30h 00mMultiple Airlines

Deal found 12/9

$482

Fri 1/236:30 amAUS - OPO

3 stops23h 10mUnited Airlines

Fri 1/3012:30 pmOPO - AUS

2 stops38h 26mUnited Airlines

Deal found 12/9

$526

Sun 1/256:25 pmAUS - OPO

2 stops15h 00mKLM

Sun 2/14:10 pmOPO - AUS

1 stop30h 00mKLM

Deal found 12/11

$488

Sun 1/255:50 amAUS - OPO

3 stops26h 00mMultiple Airlines

Sun 2/16:30 amOPO - AUS

3 stops46h 54mMultiple Airlines

Deal found 12/11

$779

Fri 1/305:10 amAUS - OPO

2 stops20h 30mIberia

Tue 2/38:20 amOPO - AUS

2 stops20h 40mIberia

Deal found 12/10

$738

Fri 1/309:50 amAUS - OPO

3 stops19h 10mUnited Airlines

Tue 2/36:00 amOPO - AUS

2 stops20h 49mUnited Airlines

Deal found 12/10

$808

One-way flights from Austin to Porto
Search for one-way flight options from Austin to Porto. Find affordable one-way fares based on user searches. Data last updated December 12, 2025.

Wed 5/1312:10 pmAUS - OPO

2 stops17h 30mMultiple Airlines

Deal found 12/11

$547

Sun 4/267:08 amAUS - OPO

2 stops18h 32mIberia

Deal found 12/11

$587

Sun 4/266:50 pmAUS - OPO

3 stops45h 05mMultiple Airlines

Deal found 12/10

$608

Sun 4/264:40 pmAUS - OPO

2 stops16h 50mAir France

Deal found 12/9

$687

Thu 6/412:10 pmAUS - OPO

2 stops17h 30mMultiple Airlines

Deal found 12/11

$747

Thu 6/411:20 amAUS - OPO

1 stop17h 10mKLM

Deal found 12/10

$1,073

Thu 6/42:15 pmAUS - OPO

3 stops34h 35mUnited Airlines

Deal found 12/10

$1,076

Sun 4/262:00 pmAUS - OPO

1 stop13h 45mLufthansa

Deal found 12/10

$1,457

Find flight deals from Austin to Porto

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$481 (Air France)
Popular in	May
Cheapest in	February
Average price	$1,171

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

Highest demand for flights based on searches. 14% potential increase in price ($159 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Fri 1/23

11:45 am-10:30 am

2 stops16h 45m

Porto

Fri 1/30

4:10 pm-4:10 pm

1 stop30h 00m

$482

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 1/25

6:25 pm-3:25 pm

2 stops15h 00m

Porto

Sun 2/1

4:10 pm-4:10 pm

1 stop30h 00m

$488

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Fri 1/23

6:30 am-11:40 am

3 stops23h 10m

Porto

Fri 1/30

12:30 pm-8:56 pm

2 stops38h 26m

$526

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Fri 1/30

6:00 am-11:45 am

2 stops23h 45m

Porto

Tue 2/3

8:20 am-11:00 pm

2 stops20h 40m

$738

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Fri 1/30

9:50 am-11:00 am

3 stops19h 10m

Porto

Tue 2/3

6:00 am-9:25 pm

2 stops21h 25m

$808

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 1/25

1:05 pm-12:50 pm

2 stops17h 45m

Porto

Sun 2/1

6:00 am-11:24 pm

3 stops47h 24m

$842

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Wed 5/13

12:10 pm-11:40 am

2 stops17h 30m

$547

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 4/26

7:08 am-7:40 am

2 stops18h 32m

$587

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 4/26

6:50 pm-9:55 pm

3 stops45h 05m

$608

AustinPorto

AUS - OPO

AUSOPO

Austin Bergstrom

Sun 4/26

4:40 pm-3:30 pm

2 stops16h 50m

$687

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 13 results

Compare providers for flights from Austin to Porto

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Austin to Porto in December.

Provider	Price Accuracy	Trust Score*
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Austin-Porto flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 $514). Flying from Austin to Porto in May is currently the most expensive (average of $1,170). 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?

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 26% on airfare.

Reviews of airlines servicing Porto

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

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Delta

7.9

Good

8,009 reviews

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

KLM

7.7

Good

1,432 reviews

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

United Airlines

7.4

Good

9,095 reviews

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Related info for your journey

How long is the flight from Austin to Porto?
Airlines like KLM and United Airlines fly from Austin to Porto in about 15h. The time it takes to get you to your destination can typically vary by up to 8h 10m. 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?
KLM, at $531, 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 41% 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 $514). Flying from Austin to Porto in May is currently the most expensive (average of $1,170). 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

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Alternative routes for Austin to Porto

Other flights to Porto

Top 3 airlines flying from Austin to Porto

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest$531	Average$865	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$541	Average$939	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$624	Average$1,017	FlexibilityNo cancel fee	On-time69%

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$482+ Cheap flights from Austin (AUS) to Porto (OPO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/23. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Austin to Porto with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Austin to Porto

Cheapest flights from Austin to PortoExplore 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 December 12, 2025.

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 December 12, 2025.

Find flight deals from Austin to Porto

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Austin to Porto that are best for you.

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 December.

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.

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?

What is the cheapest time of day to fly from AUS to OPO?

Reviews of airlines servicing Porto

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.

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?

What are the cheapest airlines flying from Austin to Porto round-trip?

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

How can I find direct flights from Austin to Porto?

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

What is the cheapest month to book a flight from Austin to Porto?

Traveling to a place near Porto?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Austin to Porto

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Austin to Porto

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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 December 12, 2025.