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Cheap flights from Portsmouth to Austin from £672

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 23/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — AUS
15 Sep — 22 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Austin

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Austin
Explore the most affordable flight options available from Portsmouth to Austin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 August 2026.

Tue 29/909:05 -
2 stops20h 08m
Tue 6/1015:59 -
2 stops18h 51m
Deal found 15/8£739
Tue 15/919:55 -
2 stops25h 30m
Wed 30/917:55 -
2 stops15h 40m
Deal found 13/8£872
Thu 1/1006:50 -
2 stops38h 35m
Mon 5/1022:30 -
2 stops16h 25m
Deal found 11/8£929
Wed 4/1115:15 -
2 stops31h 30m
Sun 8/1118:55 -
2 stops32h 50m
Deal found 13/8£959
Tue 29/908:55 -
3 stops35h 05m
Tue 6/1016:25 -
2 stops21h 05m
Deal found 15/8£1,118
Sun 23/810:15 -
3 stops19h 35m
Mon 24/817:55 -
2 stops32h 10m
Deal found 12/8£1,266
Wed 9/917:20 -
1 stop28h 50m
Tue 15/907:30 -
2 stops43h 05m
Deal found 12/8£1,393

Find flight deals from Portsmouth to Austin

Keep the following information in mind while searching for Portsmouth to Austin flight deals. Data was last updated 16 August 2026.

Round-trip from

£739

One-way from

£672

Popular in

August

Cheapest in

February

Average price

£876
KLM
  • KLM
  • 29/9-6/10
  • 4 total stops
  • 38h 59m total
  • Portsmouth to Austin
Search Deals
British Airways
  • British Airways
  • 23/10
  • 2 total stops
  • 30h 40m total
  • Portsmouth to Austin
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£64 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth 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 858,174 searches. Data last updated 16 August 2026.
Use the filters below to find and compare flights from Portsmouth to Austin that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

SouthamptonAustin

SOU Southampton Eastleigh - AUS Austin Bergstrom

SOUAUS

Southampton Eastleigh

Tue 29/9

09:05-23:13

2 stops20h 08m

Austin Bergstrom

Tue 6/10

15:59-16:50

2 stops18h 51m

£739

SouthamptonAustin

SOU Southampton Eastleigh - AUS Austin Bergstrom

SOUAUS

Southampton Eastleigh

Tue 15/9

19:55-15:25

2 stops25h 30m

Austin Bergstrom

Wed 30/9

17:55-15:35

2 stops15h 40m

£872

SouthamptonAustin

SOU Southampton Eastleigh - AUS Austin Bergstrom

SOUAUS

Southampton Eastleigh

Thu 1/10

06:50-15:25

2 stops38h 35m

Austin Bergstrom

Mon 5/10

22:30-20:55

2 stops16h 25m

£929

SouthamptonAustin

SOU Southampton Eastleigh - AUS Austin Bergstrom

SOUAUS

Southampton Eastleigh

Wed 4/11

15:15-16:45

2 stops31h 30m

Austin Bergstrom

Sun 8/11

18:55-09:45

2 stops32h 50m

£959

SouthamptonAustin

SOU Southampton Eastleigh - AUS Austin Bergstrom

SOUAUS

Southampton Eastleigh

Tue 29/9

08:55-14:00

3 stops35h 05m

Austin Bergstrom

Tue 6/10

16:25-08:35

3 stops34h 10m

£1,141

SouthamptonAustin

SOU Southampton Eastleigh - AUS Austin Bergstrom

SOUAUS

Southampton Eastleigh

Wed 9/9

17:20-16:10

1 stop28h 50m

Austin Bergstrom

Tue 15/9

07:30-08:35

2 stops43h 05m

£1,393
Cheapest one-way
Fastest single journey

SouthamptonAustin

SOU Southampton Eastleigh - AUS Austin Bergstrom

SOUAUS

Southampton Eastleigh

Thu 22/10

09:05-16:10

1 stop13h 05m

£1,512

SouthamptonAustin

SOU Southampton Eastleigh - AUS Austin Bergstrom

SOUAUS

Southampton Eastleigh

Sun 23/8

20:50-20:35

2 stops29h 45m

£8,436

SouthamptonAustin

SOU Southampton Eastleigh - AUS Austin Bergstrom

SOUAUS

Southampton Eastleigh

Wed 21/10

18:10-15:25

2 stops27h 15m

£8,439

Flights are sorted by cheapest return flights first.

Deals found on 12/8

Sorted by cheapest first

Best time to book a flight from Portsmouth to Austin

Have a flexible travel schedule? Discover the best time to fly to Austin from Portsmouth with our price prediction graph.
Estimated return 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 Portsmouth to Austin

What is the cheapest time of day to fly from P0R to AUS?

Find hourly flight availability from Portsmouth to Austin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 August 2026.

When flying from Portsmouth to Austin, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Portsmouth to Austin

Explore weekly flight availability from Portsmouth to Austin. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 16 August 2026.

The most flights from P0R to AUS are scheduled on a Friday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Austin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Austin from Portsmouth?

    For a flight from Portsmouth to Austin, you will be flying into Austin Bergstrom. Austin Bergstrom (AUS) is just 7.5 mi from the center of the city. Austin Bergstrom is the only Austin airport and it handles 0 inbound flights from Portsmouth per day. 10 airlines have flights to Austin Bergstrom from Portsmouth on a regular basis.

  • How long is the flight from Portsmouth to Austin?

    There are many flights that can get you from Portsmouth to Austin in 20h 08m. Fly via KLM or British Airways to get the fastest option. The distance from Portsmouth to Austin is about 4881 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most reliable airlines from Portsmouth to Austin?

    Before booking your flight to Austin from Portsmouth, check out the most reliable airlines to get you to your destination on time: Finnair (74%), American Airlines (69%), British Airways( 69%).

  • What are the cheapest flights from Portsmouth to Austin?

    The cheapest flight price from Portsmouth to Austin is £458. On average you can expect to pay £1,125. The most popular route, (Southampton Eastleigh - Austin Bergstrom), can usually be booked for £872.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portsmouth 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

Travelling to a place near Austin?

Book flights to Austin if you plan to visit one of these locations
Round Rock

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Alternative routes for Portsmouth to Austin

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Portsmouth to Austin

Discover the top 10 airlines that operate flights from Portsmouth 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 858,174 searches. Data last updated 16 August 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£491Average£721FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£495Average£716FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£497Average£655FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
FinnairCheapest£503Average£704FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air CanadaCheapest£506Average£750FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
IberiaCheapest£532Average£820FlexibilityNo cancel feeOn-time77%
Search Iberia flights
American AirlinesCheapest£536Average£748FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Virgin AtlanticCheapest£549Average£716FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£631Average£822FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Aer LingusCheapest£672Average£825FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portsmouth to Austin?

Deals for Portsmouth to Austin flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Austin?

Cheapflights helps you find that perfect flight to Austin from Portsmouth by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Portsmouth to Austin with no change fees?

Need flexible booking options for your flight to Austin from Portsmouth? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Portsmouth to Austin become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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