Find flights
When to book
Airlines
FAQs

Cheap flights from Portsmouth to Buenos Aires from £1,136

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
6 Jul — 13 Jul1
1 adult

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 1 July 2025.

Round-trip from

£1,136

Popular in

December

Cheapest in

November

Average price

£966
Delta
  • Delta
  • 13/11-17/11
  • 4 total stops
  • 74h 25m total
  • Portsmouth to Buenos Aires
Highest demand for flights based on searches. 4% potential increase in price (£32 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£22 potential savings vs. average return price).
Average for round-trip flights in July 2025

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 1 July 2025.

Thu 13/1117:20SOU - EZE
2 stops43h 25mDelta
Mon 17/1122:25EZE - SOU
2 stops31h 00mDelta
Deal found 30/6£1,136
Wed 13/818:25SOU - EZE
2 stops31h 20mKLM
Wed 20/814:25EZE - SOU
1 stop23h 25mKLM
Deal found 29/6£1,168
Wed 13/809:10SOU - EZE
2 stops24h 20mMultiple Airlines
Wed 20/814:25EZE - SOU
2 stops22h 10mMultiple Airlines
Deal found 29/6£1,326

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 1 July 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

17:20-09:45

2 stops43h 25m

Buenos Aires Ministro Pistarini

Mon 17/11

22:25-08:25

2 stops31h 00m

£1,136

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Wed 13/8

18:25-21:45

2 stops31h 20m

Buenos Aires Ministro Pistarini

Wed 20/8

14:25-17:50

1 stop23h 25m

£1,168

SouthamptonBuenos Aires

SOU - EZE

SOUEZE

Southampton Eastleigh

Wed 13/8

09:10-05:30

2 stops24h 20m

Buenos Aires Ministro Pistarini

Wed 20/8

14:25-16:35

2 stops22h 10m

£1,326

Flights are sorted by cheapest return flights first.

Deals found on 30/6

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 1 July 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.

Reviews of airlines servicing Buenos Aires

Get insights into the airlines that provide service to Buenos Aires. 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 Buenos Aires. Reviews last updated 1 July 2025.
See what other customers who have flown with Delta and KLM from Portsmouth to Buenos Aires have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.9

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
8.0
Very Good

Entertainment

7.9

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

Entertainment

7.9

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

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

    While on average a flight from Portsmouth to Buenos Aires is generally £941, our data shows the cheapest flight currently is £753. When looking at the most popular route, (Southampton Eastleigh - Buenos Aires Ministro Pistarini), you can expect to pay £1,136 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

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 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 1 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest£437Average£1,042FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air EuropaCheapest£571Average£832FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
ITA AirwaysCheapest£605Average£1,065FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
Air CanadaCheapest£631Average£671FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
IberiaCheapest£680Average£994FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£721Average£867FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£744Average£1,012FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£770Average£1,120FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£797Average£1,091FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
LATAM AirlinesCheapest£848Average£1,079FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines 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 Buenos Aires?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Buenos Aires from Portsmouth today with Cheapflights!

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Portsmouth to Buenos Aires for you. Better yet — we are completely free to use.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.