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Cheap flights from Portsmouth to Buenos Aires from £1,045

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BUE
12 Oct — 19 Oct1
1 adult
1 adult, Economy

Cheap 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 12 September 2025.

Round-trip from

£1,045

Popular in

December

Cheapest in

March

Average price

£854
KLM
  • KLM
  • 13/11-17/11
  • 4 total stops
  • 59h 45m total
  • Portsmouth to Buenos Aires
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£36 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from Portsmouth to Buenos Aires

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 12 September 2025.

Thu 13/1118:05SOU - EZE
2 stops29h 15mKLM
Mon 17/1122:40EZE - SOU
2 stops30h 30mKLM
Deal found 10/9£1,045
Wed 24/1208:40SOU - EZE
2 stops25h 40mDelta
Mon 12/120:55EZE - SOU
2 stops41h 05mDelta
Deal found 12/9£1,132
Sun 26/1018:05SOU - EZE
1 stop16h 10mKLM
Sun 2/1116:25EZE - SOU
1 stop36h 45mKLM
Deal found 11/9£1,148
Wed 24/1208:40SOU - EZE
2 stops25h 40mDelta
Sun 11/120:55EZE - SOU
2 stops32h 55mDelta
Deal found 12/9£1,181
Fri 26/1217:30SOU - EZE
2 stops64h 50mDelta
Mon 12/120:55EZE - SOU
2 stops41h 05mDelta
Deal found 12/9£1,282

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 12 September 2025.
Use the filters below to find and compare flights from Portsmouth to Buenos Aires that are best for you.

Fly from

Portsmouth

Fly to

Buenos Aires

Route

Depart

Return

Price

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Thu 13/11

18:05-20:20

2 stops29h 15m

Buenos Aires Ministro Pistarini

Mon 17/11

22:40-08:10

2 stops30h 30m

£1,045

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Wed 24/12

08:40-07:20

2 stops25h 40m

Buenos Aires Ministro Pistarini

Mon 12/1

20:55-17:00

2 stops41h 05m

£1,132

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Sun 26/10

18:05-07:15

1 stop16h 10m

Buenos Aires Ministro Pistarini

Sun 2/11

16:25-08:10

1 stop36h 45m

£1,148

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Wed 24/12

08:40-07:20

2 stops25h 40m

Buenos Aires Ministro Pistarini

Sun 11/1

20:55-08:50

2 stops32h 55m

£1,181

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Fri 26/12

17:30-07:20

2 stops64h 50m

Buenos Aires Ministro Pistarini

Mon 12/1

20:55-17:00

2 stops41h 05m

£1,282

Flights are sorted by cheapest return flights first.

Deals found on 10/9

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 month to book a flight from Portsmouth to Buenos Aires?

Currently, May is the cheapest month in which you can book a flight from Portsmouth to Buenos Aires (average of £1,012). Flying from Portsmouth to Buenos Aires in December is currently the most expensive (average of £1,250). 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 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 12 September 2025.

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.

What is the cheapest day to fly from Portsmouth to Buenos Aires?

Use this chart to determine the cheapest time to fly return from Portsmouth to Buenos Aires. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their Portsmouth to Buenos Aires flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 KLM fly from Portsmouth to Buenos Aires in about 29h 15m. The time it takes to get you to your destination can typically vary by up to . There are 6862 mi between Portsmouth and Buenos Aires.

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

    While on average a flight from Portsmouth to Buenos Aires is generally £1,887, our data shows the cheapest flight currently is £1,068. When looking at the most popular route, (Southampton Eastleigh - Buenos Aires Ministro Pistarini), you can expect to pay £1,086 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.

  • What is the cheapest month to book a flight from Portsmouth to Buenos Aires?

    Currently, May is the cheapest month in which you can book a flight from Portsmouth to Buenos Aires (average of £1,012). Flying from Portsmouth to Buenos Aires in December is currently the most expensive (average of £1,250). 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 Portsmouth to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Ministro Pistarini flights
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Gatwick to Rosario flights
Manchester to Rosario flights

Top 10 airlines flying from Portsmouth to Buenos Aires

Discover the top 10 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 12 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest£442Average£1,198FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air EuropaCheapest£578Average£997FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
ITA AirwaysCheapest£613Average£1,078FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
Air CanadaCheapest£639Average£670FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
IberiaCheapest£706Average£1,027FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£731Average£936FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£786Average£1,060FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£814Average£1,169FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£863Average£879FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
LATAM AirlinesCheapest£897Average£1,093FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines 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?

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