$331+ 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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
AUS — OPO
Oct 7 — Oct 141
Round-trip
1 adult, Economy
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Find cheap flights from Austin to Porto 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 Austin to Porto
Cheapest
Best
Last-minute
One-way
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 September 7, 2026.
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 7, 2026.
This Delta deal was found by Cheapflights users on 9/5. 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 10/1911:25 am -
1 stop17h 05m
Wed 11/411:15 am -
1 stop34h 50m
Deal found 9/5![Delta logo]()
$714
This Delta deal was found by Cheapflights users on 9/7. 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 11/236:25 am -
2 stops22h 10m
Thu 12/35:00 am -
1 stop17h 05m
Deal found 9/7![Delta logo]()
$722
This United Airlines deal was found by Cheapflights users on 9/7. 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 11/235:15 am -
3 stops22h 15m
Thu 12/36:00 am -
2 stops18h 54m
Deal found 9/7![United Airlines logo]()
$731
This Delta deal was found by Cheapflights users on 9/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/257:10 am -
2 stops21h 25m
Tue 1/195:00 am -
2 stops23h 57m
Deal found 9/3![Delta logo]()
$782
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Tue 10/137:15 am -
1 stop20h 30m
Thu 10/2211:50 am -
2 stops41h 08m
Deal found 9/6![United Airlines logo]()
$783
This KLM deal was found by Cheapflights users on 9/7. 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.
Mon 11/236:01 pm -
1 stop15h 24m
Thu 12/35:00 am -
1 stop17h 05m
Deal found 9/7![KLM logo]()
$788
This KAYAK deal was found by Cheapflights users on 9/3. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/232:25 pm -
1 stop13h 05m
Thu 12/312:35 pm -
1 stop29h 07m
Deal found 9/3![Lufthansa logo]()
$790
Best flights from Austin to PortoDiscover 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 September 7, 2026.
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 September 7, 2026.
This Delta deal was found by Cheapflights users on 9/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:25 am -
2 stops22h 10m
Thu 12/35:00 am -
1 stop17h 05m
Deal found 9/4![Delta logo]()
$722
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Mon 11/235:15 am -
3 stops22h 15m
Thu 12/36:00 am -
2 stops18h 54m
Deal found 9/3![United Airlines logo]()
$731
This United Airlines deal was found by Cheapflights users on 9/7. 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 3/18:30 am -
1 stop19h 00m
Fri 3/56:00 am -
2 stops18h 44m
Deal found 9/7![United Airlines logo]()
$746
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Tue 3/26:30 am -
1 stop21h 00m
Fri 3/56:00 am -
2 stops23h 38m
Deal found 9/6![United Airlines logo]()
$746
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Tue 10/136:00 am -
2 stops19h 00m
Thu 10/2211:50 am -
2 stops41h 08m
Deal found 9/7![United Airlines logo]()
$787
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Thu 10/2212:15 pm -
2 stops36h 55m
Thu 10/296:00 am -
2 stops18h 04m
Deal found 9/7![United Airlines logo]()
$869
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Mon 9/217:15 am -
1 stop17h 40m
Fri 10/26:00 am -
2 stops20h 07m
Deal found 9/3![United Airlines logo]()
$974
Last-minute flights from Austin to PortoDiscover last-minute flight deals from Austin to Porto. Data last updated September 7, 2026 and is based on user searches.
Discover last-minute flight deals from Austin to Porto. Data last updated September 7, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Tue 10/137:15 am -
1 stop20h 30m
Thu 10/2211:50 am -
2 stops41h 08m
Deal found 9/6![United Airlines logo]()
$783
This Delta deal was found by Cheapflights users on 9/5. 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 10/1911:25 am -
1 stop17h 05m
Wed 11/411:15 am -
1 stop34h 50m
Deal found 9/5![Delta logo]()
$714
This Expedia deal was found by Cheapflights users on 9/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:17 pm -
2 stops21h 43m
Mon 10/268:40 pm -
2 stops31h 10m
Deal found 9/4![Iberia logo]()
$820
This Expedia deal was found by Cheapflights users on 9/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/194:05 pm -
1 stop17h 35m
Mon 10/266:15 am -
2 stops37h 50m
Deal found 9/4![Lufthansa logo]()
$844
This Delta deal was found by Cheapflights users on 9/6. 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.
Thu 10/223:59 pm -
1 stop12h 31m
Thu 10/295:00 am -
1 stop17h 05m
Deal found 9/6![Delta logo]()
$836
One-way flights from Austin to PortoSearch for one-way flight options from Austin to Porto. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
Search for one-way flight options from Austin to Porto. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/310:58 am -
3 stops40h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Multiple Airlines logo]()
$331
This United Airlines deal was found by Cheapflights users on 9/5. 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 12/288:45 am -
2 stops18h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![United Airlines logo]()
$346
This Booking.com deal was found by Cheapflights users on 9/5. 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.
Sat 10/34:05 pm -
1 stop17h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Lufthansa logo]()
$524
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:58 am -
3 stops30h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$547
This KLM deal was found by Cheapflights users on 9/4. 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.
Thu 9/176:05 pm -
1 stop15h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![KLM logo]()
$765
This Turkish Airlines deal was found by Cheapflights users on 9/7. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/123:45 pm -
2 stops25h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$766
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Sat 9/123:33 pm -
2 stops33h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![United Airlines logo]()
$879
This Cheapflightsfares deal was found by Cheapflights users on 9/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/122:19 pm -
1 stop14h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![TAP AIR PORTUGAL logo]()
$882
Find 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 7, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $714 (Delta) |
One-way from | $331 (Kiwi.com) |
Popular in | May |
Cheapest in | March |
Average price | $930 |
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 7,457,451 searches. Data last updated September 7, 2026.
Use the filters below to find and compare flights from Austin to Porto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
AustinPorto
AUS Austin Bergstrom - OPO Porto
AUSOPO
Austin Bergstrom
Sat 10/3
10:58 am-9:15 am
3 stops40h 17m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$331
AustinPorto
AUS Austin Bergstrom - OPO Porto
AUSOPO
Austin Bergstrom
Mon 12/28
8:45 am-9:30 am
2 stops18h 45m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$346
AustinPorto
AUS Austin Bergstrom - OPO Porto
AUSOPO
Austin Bergstrom
Sat 10/3
4:05 pm-3:45 pm
1 stop17h 40m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$524
AustinPorto
AUS Austin Bergstrom - OPO Porto
AUSOPO
Austin Bergstrom
Thu 9/17
10:58 am-11:50 pm
3 stops30h 52m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$547
AustinPorto
AUS Austin Bergstrom - OPO Porto
AUSOPO
Austin Bergstrom
Mon 11/23
6:25 am-10:35 am
2 stops22h 10m
Porto
Thu 12/3
5:00 am-4:05 pm
1 stop17h 05m
$722
AustinPorto
AUS Austin Bergstrom - OPO Porto
AUSOPO
Austin Bergstrom
Mon 11/23
5:15 am-9:30 am
3 stops22h 15m
Porto
Thu 12/3
6:00 am-6:54 pm
2 stops18h 54m
$731
AustinPorto
AUS Austin Bergstrom - OPO Porto
AUSOPO
Austin Bergstrom
Mon 3/1
8:30 am-9:30 am
1 stop19h 00m
Porto
Fri 3/5
6:00 am-6:44 pm
2 stops18h 44m
$746
AustinPorto
AUS Austin Bergstrom - OPO Porto
AUSOPO
Austin Bergstrom
Tue 3/2
6:30 am-9:30 am
1 stop21h 00m
Porto
Fri 3/5
6:00 am-11:38 pm
2 stops23h 38m
$746
AustinPorto
AUS Austin Bergstrom - OPO Porto
AUSOPO
Austin Bergstrom
Thu 9/17
6:05 pm-3:30 pm
1 stop15h 25m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$765
AustinPorto
AUS Austin Bergstrom - OPO Porto
AUSOPO
Austin Bergstrom
Sat 9/12
3:45 pm-11:30 pm
2 stops25h 45m
Porto
Wed 12/31
12:00 am-5:00 pm
Nonstop0h 00m
$766
Showing 1-10 of 15 resultsSorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Austin-Porto flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Austin-Porto flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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.
AUS-OPO
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 $562). Flying from Austin to Porto in May is currently the most expensive (average of $1,226). 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.
How much does it cost to fly round-trip from Austin to Porto?
Airfare is below average for this route at the moment.
Austin to Porto flights typically cost between $810 and $1,410 in October.The cheapest round-trip price found within the last 5 days was $714 on Delta (Oct 19-Nov 4).
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 7, 2026.
Read through reviews of airlines operating flights from Austin to Porto, such as KLM,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.3
Boarding
7.8
Entertainment
7.2
Crew
8.4
Comfort
7.7
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Food
7.3
Boarding
7.8
Entertainment
7.2
Crew
8.4
Comfort
7.7
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Food
7.3
Boarding
7.8
Entertainment
7.2
Crew
8.4
Comfort
7.7
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Food
7.3
Boarding
7.8
Entertainment
7.2
Crew
8.4
Comfort
7.7
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Food
7.3
Boarding
7.8
Entertainment
7.2
Crew
8.4
Comfort
7.7
Overall
7.8
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
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.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Arcos de Valdevez
Coimbra
Aveiro
Browse thousands of different options on Cheapflights for your next trip
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Austin and Porto flights
Browse other Austin and Porto flight options. Last updated on September 7, 2026.
Other flights from Austin
Browse through other flights departing from Austin. Flights are based on user searches made on Cheapflights and were last updated on September 7, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Other flights to Porto
Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 7, 2026.
Top 4 airlines flying from Austin to Porto
Discover the top 4 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 7,457,451 searches. Data last updated September 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$478 | Average$1,104 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$532 | Average$986 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$581 | Average$794 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$672 | Average$1,051 | FlexibilityNo cancel fee | On-time76% |