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Cheap flights from Portsmouth to Buenos Aires from £1,027

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BUE
2 Sep — 9 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Buenos Aires

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Buenos Aires
Explore the most affordable flight options available from Portsmouth to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 August 2026.

Wed 16/917:20
SOU
-
EZE
2 stops47h 05m
KLM
Wed 23/915:05
EZE
-
SOU
1 stop21h 45m
KLM
Deal found 2/8£1,027
Wed 16/909:15
SOU
-
EZE
2 stops28h 30m
Delta
Wed 23/920:10
EZE
-
SOU
2 stops32h 25m
Delta
Deal found 2/8£1,049
Fri 13/1109:20
SOU
-
EZE
2 stops27h 20m
Multiple Airlines
Thu 19/1113:05
EZE
-
SOU
1 stop27h 50m
Multiple Airlines
Deal found 30/7£1,107
Tue 1/909:05
SOU
-
EZE
2 stops28h 40m
Delta
Mon 7/920:10
EZE
-
SOU
2 stops40h 40m
Delta
Deal found 2/8£1,184
Tue 1/909:05
SOU
-
EZE
2 stops40h 45m
KLM
Mon 7/915:05
EZE
-
SOU
1 stop37h 40m
KLM
Deal found 2/8£1,228
Fri 13/1117:30
SOU
-
EZE
2 stops29h 55m
KLM
Thu 19/1122:45
EZE
-
SOU
2 stops31h 10m
KLM
Deal found 30/7£1,244
Wed 16/908:55
SOU
-
EZE
3 stops31h 30m
Multiple Airlines
Wed 23/915:35
EZE
-
SOU
3 stops25h 10m
Multiple Airlines
Deal found 2/8£1,271
Tue 1/917:20
SOU
-
EZE
3 stops35h 45m
Multiple Airlines
Sun 6/901:35
EZE
-
SOU
3 stops27h 00m
Multiple Airlines
Deal found 2/8£1,499

Find flight deals from Portsmouth to Buenos Aires

Keep the following information in mind while searching for Portsmouth to Buenos Aires flight deals. Data was last updated 3 August 2026.

Round-trip from

£1,027

Popular in

December

Cheapest in

September

Average price

£1,033
KLM
  • KLM
  • 16/9-23/9
  • 3 total stops
  • 68h 50m total
  • Portsmouth to Buenos Aires
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£19 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 Buenos Aires 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 3 August 2026.
Use the filters below to find and compare flights from Portsmouth to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Wed 16/9

09:15-09:45

2 stops28h 30m

Buenos Aires Ministro Pistarini

Wed 23/9

20:10-08:35

2 stops32h 25m

£1,049

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Tue 1/9

09:05-09:45

2 stops28h 40m

Buenos Aires Ministro Pistarini

Mon 7/9

20:10-16:50

2 stops40h 40m

£1,184

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Fri 13/11

17:30-20:25

2 stops29h 55m

Buenos Aires Ministro Pistarini

Thu 19/11

22:45-08:55

2 stops31h 10m

£1,244

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Tue 1/9

09:05-05:50

1 stop24h 45m

Buenos Aires Ministro Pistarini

Mon 7/9

15:05-08:45

1 stop37h 40m

£1,307
Fastest return journey

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Tue 1/9

17:20-01:05

3 stops35h 45m

Buenos Aires Ministro Pistarini

Mon 7/9

16:35-16:50

2 stops20h 15m

£1,745

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Fri 13/11

06:50-21:10

3 stops41h 20m

Buenos Aires Ministro Pistarini

Thu 19/11

23:00-14:30

3 stops60h 30m

£1,824

Flights are sorted by cheapest return flights first.

Deals found on 2/8

Sorted by cheapest first

Best time to book a flight from Portsmouth to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires 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 Buenos Aires

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

Find hourly flight availability from Portsmouth to Buenos Aires. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 August 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to Buenos Aires as you normally would.

Weekly flight availability from Portsmouth to Buenos Aires

Explore weekly flight availability from Portsmouth to Buenos Aires. 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 3 August 2026.

The most flights from P0R to BUE are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Buenos Aires. 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 Portsmouth to Buenos Aires?

    Airlines like Delta and KLM fly from Portsmouth to Buenos Aires in about 28h 30m. The time it takes to get you to your destination can typically vary by up to 1h 25m. There are 6862 mi between Portsmouth and Buenos Aires. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest flights from Portsmouth to Buenos Aires?

    While on average a flight from Portsmouth to Buenos Aires is generally £1,129, our data shows the cheapest flight currently is £866. When looking at the most popular route, (Southampton Eastleigh - Buenos Aires Ministro Pistarini), you can expect to pay £1,027 for that flight.

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

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

  • How can I find direct flights from Portsmouth to Buenos Aires?

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to Buenos Aires 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

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.

Top 6 airlines flying from Portsmouth to Buenos Aires

Discover the top 6 airlines that operate flights from Portsmouth to Buenos Aires. 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 3 August 2026.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest£689Average£779FlexibilityNo cancel feeOn-time71%
Search Avianca flights
IberiaCheapest£735Average£1,040FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LATAM AirlinesCheapest£840Average£1,079FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
American AirlinesCheapest£863Average£880FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapest£870Average£1,025FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£919Average£1,107FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Portsmouth to Buenos Aires?

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

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

Need flexible booking options for your flight to Buenos Aires 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 Buenos Aires become cheaper?

Of course! You can now track prices for flights from Portsmouth to Buenos Aires and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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