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Cheap flights from London Heathrow Airport to Buenos Aires from $626

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 Heathrow Airport to Buenos Aires departing on 3/13. 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 Heathrow Airport to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:05 pm - 8:20 am
LHR
-
EZE
23h 15m
1 stop
United Airlines Logo
9:05 pm - 6:20 am
EZE
-
LHR
30h 15m
2 stops
$1,069United Airlines
Sun, Mar 8 - Tue, Mar 24
United Airlines Logo
11:35 am - 9:20 am
LHR
-
EZE
24h 45m
2 stops
United Airlines Logo
9:05 pm - 7:55 am
EZE
-
LHR
31h 50m
2 stops
$1,070United Airlines
Mon, Mar 2 - Mon, Mar 16
Multiple Airlines Logo
5:15 pm - 10:50 am
LHR
-
EZE
21h 35m
2 stops
Multiple Airlines Logo
4:35 pm - 8:40 pm
EZE
-
LHR
24h 05m
1 stop
$1,072Multiple Airlines
Tue, May 12 - Sun, May 31
United Airlines Logo
12:05 pm - 9:20 am
LHR
-
EZE
24h 15m
1 stop
United Airlines Logo
10:55 pm - 7:30 am
EZE
-
LHR
29h 35m
1 stop
$1,075United Airlines
Thu, Feb 26 - Thu, Mar 19
Turkish Airlines Logo
3:05 pm - 10:25 pm
LHR
-
EZE
58h 20m
2 stops
Turkish Airlines Logo
11:55 pm - 4:50 pm
EZE
-
LHR
36h 55m
2 stops
$1,093Turkish Airlines
Mon, Mar 9 - Fri, May 8
Multiple Airlines Logo
5:15 pm - 10:50 am
LHR
-
EZE
21h 35m
2 stops
Multiple Airlines Logo
4:35 pm - 4:40 pm
EZE
-
LHR
20h 05m
1 stop
$1,094Multiple Airlines
Tue, May 12 - Mon, Jun 1
Avianca Logo
9:40 pm - 5:40 am
LHR
-
AEP
35h 00m
1 stop
Avianca Logo
7:00 am - 3:35 pm
AEP
-
LHR
28h 35m
1 stop
$1,113Avianca
Wed, Mar 11 - Wed, May 6
Avianca Logo
9:40 pm - 5:40 am
LHR
-
AEP
35h 00m
1 stop
Avianca Logo
7:00 am - 3:35 pm
AEP
-
LHR
28h 35m
1 stop
$1,186Avianca
Sat, Mar 7 - Sun, May 10
LATAM Airlines Logo
8:00 pm - 4:00 pm
LHR
-
AEP
24h 00m
2 stops
LATAM Airlines Logo
6:20 pm - 3:05 pm
AEP
-
LHR
16h 45m
1 stop
$1,228LATAM Airlines
Thu, May 7 - Mon, May 18
LATAM Airlines Logo
9:20 pm - 2:50 pm
LHR
-
AEP
21h 30m
2 stops
LATAM Airlines Logo
6:20 pm - 3:05 pm
AEP
-
LHR
16h 45m
1 stop
$1,247LATAM Airlines
Sat, May 9 - Mon, May 18

SWISS flights from London Heathrow Airport to Buenos Aires

Our best SWISS deals on London Heathrow Airport to Buenos Aires flight tickets
SWISS
Mar 16
LHR8:05 pmLondon Heathrow
42h 45m
2 stops
EZE11:50 amBuenos Aires Ministro Pistarini
Apr 1
EZE1:30 pmBuenos Aires Ministro Pistarini
22h 55m
2 stops
LHR4:25 pmLondon Heathrow
$1,095
SWISS
May 5
LHR5:15 pmLondon Heathrow
21h 35m
2 stops
EZE10:50 amBuenos Aires Ministro Pistarini
May 27
EZE1:30 pmBuenos Aires Ministro Pistarini
22h 55m
2 stops
LHR4:25 pmLondon Heathrow
$1,112
SWISS
Mar 17
LHR6:40 pmLondon Heathrow
20h 10m
2 stops
EZE11:50 amBuenos Aires Ministro Pistarini
Mar 18
EZE2:40 pmBuenos Aires Ministro Pistarini
27h 45m
3 stops
LHR9:25 pmLondon Heathrow
$1,114

United Airlines flights from London Heathrow Airport to Buenos Aires

Our best United Airlines deals on London Heathrow Airport to Buenos Aires flight tickets
United Airlines
Mar 8
LHR12:05 pmLondon Heathrow
23h 15m
1 stop
EZE8:20 amBuenos Aires Ministro Pistarini
Mar 24
EZE9:05 pmBuenos Aires Ministro Pistarini
30h 15m
2 stops
LHR6:20 amLondon Heathrow
$1,069
United Airlines
Mar 2
LHR11:35 amLondon Heathrow
24h 45m
2 stops
EZE9:20 amBuenos Aires Ministro Pistarini
Mar 16
EZE9:05 pmBuenos Aires Ministro Pistarini
31h 50m
2 stops
LHR7:55 amLondon Heathrow
$1,070
United Airlines
Feb 26
LHR12:05 pmLondon Heathrow
24h 15m
1 stop
EZE9:20 amBuenos Aires Ministro Pistarini
Mar 19
EZE10:55 pmBuenos Aires Ministro Pistarini
29h 35m
1 stop
LHR7:30 amLondon Heathrow
$1,075

momondo Fare Finder

 
Customize your flight search to find flights from London Heathrow Airport 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 February 4, 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 3/8

12:05 pm-8:20 am

1 stop23h 15m

Buenos Aires Ministro Pistarini

Tue 3/24

9:05 pm-6:20 am

2 stops30h 15m

$1,069

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 3/2

11:35 am-9:20 am

2 stops24h 45m

Buenos Aires Ministro Pistarini

Mon 3/16

9:05 pm-7:55 am

2 stops31h 50m

$1,070

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 5/12

5:15 pm-10:50 am

2 stops21h 35m

Buenos Aires Ministro Pistarini

Sun 5/31

4:35 pm-8:40 pm

1 stop24h 05m

$1,072

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 2/26

12:05 pm-9:20 am

1 stop24h 15m

Buenos Aires Ministro Pistarini

Thu 3/19

10:55 pm-7:30 am

1 stop29h 35m

$1,075

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 3/9

3:05 pm-10:25 pm

2 stops58h 20m

Buenos Aires Ministro Pistarini

Fri 5/8

11:55 pm-4:50 pm

2 stops36h 55m

$1,093

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 5/12

5:15 pm-10:50 am

2 stops21h 35m

Buenos Aires Ministro Pistarini

Mon 6/1

4:35 pm-4:40 pm

1 stop20h 05m

$1,094

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 3/11

9:40 pm-5:40 am

1 stop35h 00m

Buenos Aires Jorge Newbery

Wed 5/6

7:00 am-3:35 pm

1 stop28h 35m

$1,113

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sat 3/7

9:40 pm-5:40 am

1 stop35h 00m

Buenos Aires Jorge Newbery

Sun 5/10

7:00 am-3:35 pm

1 stop28h 35m

$1,186

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Thu 5/7

8:00 pm-4:00 pm

2 stops24h 00m

Buenos Aires Jorge Newbery

Mon 5/18

6:20 pm-3:05 pm

1 stop16h 45m

$1,228

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sat 5/9

9:20 pm-2:50 pm

2 stops21h 30m

Buenos Aires Jorge Newbery

Mon 5/18

6:20 pm-3:05 pm

1 stop16h 45m

$1,247

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 Heathrow Airport 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 typical price of a round-trip flight between London Heathrow Airport and Buenos Aires?

What is the cheapest month to fly to Buenos Aires?

The cheapest month to fly to Buenos Aires from London Heathrow Airport is in May. Flight prices, which tend to average around $1,212, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of May, then book flights to Buenos Aires from London Heathrow Airport during February instead. Flights to Buenos Aires in February, while not as cheap as those in May, still average around $1,215.

What is the cheapest London Heathrow to Buenos Aires flight route?

Fly from London Heathrow to Buenos Aires Ministro Pistarini for the best London Heathrow - 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 Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,375 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 Heathrow Airport for as low as $1,156 on momondo.

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

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

Can stopping save me money on London Heathrow Airport to Buenos Aires flights?

You could potentially save up to 40% on your flight if you consider stops on a London Heathrow Airport to Buenos Aires flight.

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

As of February 2026, prices for London Heathrow Airport to Buenos Aires flights are approximately 44% more expensive when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Buenos Aires

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

Cheap London Heathrow Airport to Buenos Aires (LHR to BUE) flight deals and tips

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

Fastest flight time

16h 25m

Direct flights

None
The fastest flight from London Heathrow Airport to Buenos Aires takes 16h 25m
There are no direct flights from London Heathrow Airport to Buenos Aires. There are no popular flight routes from London Heathrow Airport to Buenos Aires.
Search flight deals

  • How far is London Heathrow to Buenos Aires by plane?

    The distance between London Heathrow and Buenos Aires is about 6898.3 mi. By plane, this route typically takes 16h 25m.

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

    Prices for flights from London Heathrow Airport to Buenos Aires are updated daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Buenos Aires.

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

    The required travel and health documents for your Buenos Aires trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Buenos Aires. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

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?

Yes. All flights to Buenos Aires from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential London to Buenos Aires flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for London to Buenos Aires flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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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