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Cheap flights from London to Buenos Aires from $643

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Buenos Aires departing on 3/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
Avianca Logo
9:40 pm - 3:50 pmLHR-EZE
21h 10m1 stop
Avianca Logo
1:40 am - 2:35 pmEZE-LHR
33h 55m1 stop
$1,063Avianca
Find Deal
Thu, Feb 26 - Wed, Mar 18
Turkish Airlines Logo
10:35 pm - 10:25 pmLHR-EZE
26h 50m2 stops
Turkish Airlines Logo
11:55 pm - 2:55 pmEZE-LHR
36h 00m2 stops
$1,064Turkish Airlines
Find Deal
Tue, Jan 13 - Mon, Feb 2
Turkish Airlines Logo
6:20 am - 10:25 pmLGW-EZE
43h 05m2 stops
Turkish Airlines Logo
11:55 pm - 4:10 pmEZE-LGW
37h 15m2 stops
$1,066Turkish Airlines
Find Deal
Mon, Dec 29 - Mon, Feb 2
Lufthansa Logo
6:15 pm - 7:55 amLCY-EZE
16h 40m1 stop
Lufthansa Logo
5:45 pm - 5:40 pmEZE-LCY
20h 55m1 stop
$1,067Lufthansa
Find Deal
Tue, Dec 2 - Sun, Dec 14
Lufthansa Logo
9:30 am - 7:55 amLHR-EZE
25h 25m1 stop
Lufthansa Logo
5:45 pm - 12:50 pmEZE-LHR
16h 05m1 stop
$1,073Lufthansa
Find Deal
Sun, Nov 30 - Sun, Dec 7
British Airways Logo
7:40 pm - 8:40 amLGW-EZE
16h 00m1 stop
British Airways Logo
9:40 pm - 8:00 pmEZE-LGW
18h 20m1 stop
$1,111British Airways
Find Deal
Thu, Mar 5 - Tue, Jun 2
British Airways Logo
11:45 am - 8:40 amLGW-EZE
23h 55m1 stop
British Airways Logo
9:40 pm - 8:00 pmEZE-LGW
18h 20m1 stop
$1,112British Airways
Find Deal
Thu, Mar 5 - Tue, Jun 2
Air Europa Logo
5:25 pm - 8:50 amLGW-EZE
18h 25m1 stop
Air Europa Logo
12:10 pm - 4:25 pmEZE-LGW
24h 15m1 stop
$1,131Air Europa
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Fri, Mar 6 - Tue, Jun 2
Air Europa Logo
5:25 pm - 8:50 amLGW-EZE
18h 25m1 stop
Air Europa Logo
12:10 pm - 9:00 amEZE-LGW
16h 50m1 stop
$1,132Air Europa
Find Deal
Fri, Mar 6 - Tue, Jun 2
American Airlines Logo
2:30 pm - 9:10 amLHR-EZE
21h 40m1 stop
American Airlines Logo
10:30 pm - 6:50 amEZE-LHR
29h 20m1 stop
$1,157American Airlines
Find Deal
Thu, Dec 4 - Tue, Dec 9

Avianca flights from London to Buenos Aires

Our best Avianca deals on London to Buenos Aires flight tickets
Avianca
Feb 26
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Mar 18
EZE1:40 amBuenos Aires Ministro Pistarini
33h 55m
1 stop
LHR2:35 pmLondon Heathrow
$1,063
Find similar
Avianca
Apr 10
LHR10:05 pmLondon Heathrow
21h 15m
1 stop
EZE3:20 pmBuenos Aires Ministro Pistarini
Apr 14
EZE4:45 pmBuenos Aires Ministro Pistarini
18h 50m
1 stop
LHR3:35 pmLondon Heathrow
$1,066
Find similar
Avianca
Feb 26
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Mar 18
EZE1:40 amBuenos Aires Ministro Pistarini
33h 55m
1 stop
LHR2:35 pmLondon Heathrow
$1,070
Find similar

Turkish Airlines flights from London to Buenos Aires

Our best Turkish Airlines deals on London to Buenos Aires flight tickets
Turkish Airlines
Jan 13
LHR10:35 pmLondon Heathrow
26h 50m
2 stops
EZE10:25 pmBuenos Aires Ministro Pistarini
Feb 2
EZE11:55 pmBuenos Aires Ministro Pistarini
36h 00m
2 stops
LHR2:55 pmLondon Heathrow
$1,064
Find similar
Turkish Airlines
Dec 29
LGW6:20 amLondon Gatwick
43h 05m
2 stops
EZE10:25 pmBuenos Aires Ministro Pistarini
Feb 2
EZE11:55 pmBuenos Aires Ministro Pistarini
37h 15m
2 stops
LGW4:10 pmLondon Gatwick
$1,066
Find similar
Turkish Airlines
Feb 3
LGW10:15 amLondon Gatwick
39h 10m
2 stops
EZE10:25 pmBuenos Aires Ministro Pistarini
Feb 10
EZE11:55 pmBuenos Aires Ministro Pistarini
30h 30m
2 stops
LGW9:25 amLondon Gatwick
$1,080
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London 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, momondo users made 832,500 searches. Data last updated November 2, 2025.
Use the filters below to find and compare flights from London to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 2/26

9:40 pm-3:50 pm

1 stop21h 10m

Buenos Aires Ministro Pistarini

Wed 3/18

1:40 am-2:35 pm

1 stop33h 55m

$1,063

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 1/13

10:35 pm-10:25 pm

2 stops26h 50m

Buenos Aires Ministro Pistarini

Mon 2/2

11:55 pm-2:55 pm

2 stops36h 00m

$1,064

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Mon 12/29

6:20 am-10:25 pm

2 stops43h 05m

Buenos Aires Ministro Pistarini

Mon 2/2

11:55 pm-4:10 pm

2 stops37h 15m

$1,066

LondonBuenos Aires

LCY - EZE

LCYEZE

London City

Tue 12/2

6:15 pm-7:55 am

1 stop16h 40m

Buenos Aires Ministro Pistarini

Sun 12/14

5:45 pm-5:40 pm

1 stop20h 55m

$1,067

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 11/30

9:30 am-7:55 am

1 stop25h 25m

Buenos Aires Ministro Pistarini

Sun 12/7

5:45 pm-12:50 pm

1 stop16h 05m

$1,073

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Thu 3/5

7:40 pm-8:40 am

1 stop16h 00m

Buenos Aires Ministro Pistarini

Tue 6/2

9:40 pm-8:00 pm

1 stop18h 20m

$1,111

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Thu 3/5

11:45 am-8:40 am

1 stop23h 55m

Buenos Aires Ministro Pistarini

Tue 6/2

9:40 pm-8:00 pm

1 stop18h 20m

$1,112

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Fri 3/6

5:25 pm-8:50 am

1 stop18h 25m

Buenos Aires Ministro Pistarini

Tue 6/2

12:10 pm-4:25 pm

1 stop24h 15m

$1,131

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Fri 3/6

5:25 pm-8:50 am

1 stop18h 25m

Buenos Aires Ministro Pistarini

Tue 6/2

12:10 pm-9:00 am

1 stop16h 50m

$1,132

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 12/4

2:30 pm-9:10 am

1 stop21h 40m

Buenos Aires Ministro Pistarini

Tue 12/9

10:30 pm-6:50 am

1 stop29h 20m

$1,157

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Buenos Aires from

How to get the cheapest flight ticket from London to Buenos Aires

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Buenos Aires?

The cheapest month to fly to Buenos Aires from London is in September. Flight prices, which tend to average around $1,132, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Buenos Aires from London during March instead. Flights to Buenos Aires in March, while not as cheap as those in September, still average around $1,161.

What is the cheapest time of day to depart on your flight to Buenos Aires?

Our most recent data shows that the best time of day to fly to Buenos Aires is in the afternoon. Flights from London to Buenos Aires during this time can be as low as $1,156. Try not to purchase tickets at noon because they tend to be around $1,377. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest London to Buenos Aires flight route?

Fly from London Heathrow to Buenos Aires Ministro Pistarini for the best London - Buenos Aires flight prices

How far in advance should I book a flight to Buenos Aires?

You are more likely to see cheaper flights to Buenos Aires from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,369 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from London for as low as $1,162 on momondo.

What cabin class options are available on London to Buenos Aires flights?

There is only 1 cabin class available to choose from on London to Buenos Aires flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have London to Buenos Aires flight prices changed over time?

As of November 2025, prices for London to Buenos Aires flights are approximately 7% cheaper when compared to flights at the same time last year.

When to book flights from London to Buenos Aires

Are you open to changing your travel dates? Check out the ideal times to fly from London to Buenos Aires according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London to Buenos Aires (LON to BUE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Buenos Aires

Direct flights

None
There are no direct flights from London to Buenos Aires. There are no popular flight routes from London to Buenos Aires.
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  • How far is London to Buenos Aires by plane?

    Buenos Aires is 6909.8 mi away from London. A reasonable flight in good conditions will take 15h 25m.

  • When did momondo last update prices for flights from London to Buenos Aires?

    Prices for flights from London to Buenos Aires refresh daily.

  • How many operators does momondo search for flights from London to Buenos Aires?

  • How old do you have to be to fly from London to Buenos Aires?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Buenos Aires.

  • What documentation or ID do you need to fly to Buenos Aires?

    The travel and health documents required for your trip to Buenos Aires can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Buenos Aires. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from London to Buenos Aires?

  • What is the most popular airline from London to Buenos Aires?

Best airlines flying from London to Buenos Aires

Compare and see reviews for airlines that fly from London to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
IberiaPriceFrom $1,021Free CancellationRating
7.0
3,005 reviews
Search Iberia flights

  • Iberia Flights From London to Buenos Aires

    Across 7 Iberia flights from London to Buenos Aires this week, the average price was $1,191, with the best Iberia deals starting from $1,021 round-trip. 3,005 users have rated Iberia on momondo, with an average score of 7.0/10.

Why use momondo?

Why should I use momondo to find a flight deal from London to Buenos Aires?

Finding the right flight to Buenos Aires from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Buenos Aires quick and easy, saving you time and money.

Can I find flights from London to Buenos Aires with flexible booking policies on momondo?

All flight searches from London to Buenos Aires on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to Buenos Aires?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Buenos Aires.

I’m not ready to book a flight from London to Buenos Aires right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Buenos Aires, momondo offers a useful price alert feature which will track prices for flights to Buenos Aires from London and alert you when they change.

An easier way to manage your Buenos Aires trip

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Find better results for your trip to Argentina

Fly into one of these airports located in Buenos Aires

Airports listed have a maximum distance of 17.0 mi from Buenos Aires
Buenos Aires Jorge Newbery Airport
Buenos Aires Ministro Pistarini Airport