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Cheap flights from London Heathrow Airport to Buenos Aires from $620

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 1/25. 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.
Turkish Airlines Logo
5:45 pm - 10:25 pm
LHR
-
EZE
31h 40m2 stops
Turkish Airlines Logo
11:55 pm - 2:55 pm
EZE
-
LHR
36h 00m2 stops
$1,118Turkish Airlines
Mon, Feb 9 - Mon, Feb 16
Air Canada Logo
8:30 am - 5:20 pm
LHR
-
AEP
36h 50m2 stops
Air Canada Logo
1:30 pm - 6:35 am
AEP
-
LHR
37h 05m2 stops
$1,120Air Canada
Mon, Apr 13 - Wed, Apr 29
British Airways Logo
10:00 pm - 11:45 am
LHR
-
EZE
16h 45m1 stop
British Airways Logo
12:25 pm - 8:10 am
EZE
-
LHR
15h 45m1 stop
$1,129British Airways
Mon, Mar 2 - Thu, May 21
United Airlines Logo
12:05 pm - 7:20 am
LHR
-
EZE
22h 15m1 stop
United Airlines Logo
10:05 pm - 5:55 am
EZE
-
LHR
28h 50m2 stops
$1,130United Airlines
Tue, Feb 3 - Mon, Feb 23
Avianca Logo
10:05 pm - 12:10 am
LHR
-
EZE
30h 05m1 stop
Avianca Logo
4:45 pm - 3:35 pm
EZE
-
LHR
18h 50m1 stop
$1,132Avianca
Thu, Apr 9 - Tue, Apr 21
Turkish Airlines Logo
8:00 pm - 10:25 pm
LHR
-
EZE
29h 25m2 stops
Turkish Airlines Logo
11:55 pm - 4:10 pm
EZE
-
LHR
37h 15m2 stops
$1,133Turkish Airlines
Tue, Feb 24 - Sat, Mar 7
United Airlines Logo
12:05 pm - 9:20 am
LHR
-
EZE
24h 15m1 stop
United Airlines Logo
11:55 pm - 10:15 am
EZE
-
LHR
31h 20m1 stop
$1,135United Airlines
Thu, Jan 22 - Thu, Jan 29
LATAM Airlines Logo
8:15 pm - 9:40 am
LHR
-
AEP
16h 25m1 stop
LATAM Airlines Logo
2:55 pm - 3:05 pm
AEP
-
LHR
20h 10m1 stop
$1,160LATAM Airlines
Thu, Mar 19 - Sun, Apr 5
Avianca Logo
10:05 pm - 5:40 am
LHR
-
AEP
35h 35m1 stop
Avianca Logo
7:00 am - 3:35 pm
AEP
-
LHR
28h 35m1 stop
$1,166Avianca
Mon, Apr 6 - Mon, Apr 20
LATAM Airlines Logo
6:45 pm - 4:00 pm
LHR
-
AEP
24h 15m2 stops
LATAM Airlines Logo
10:35 am - 2:55 pm
AEP
-
LHR
24h 20m2 stops
$1,200LATAM Airlines
Sun, Mar 15 - Mon, Mar 30

Delta flights from London Heathrow Airport to Buenos Aires

Our best Delta deals on London Heathrow Airport to Buenos Aires flight tickets
Delta
Jan 11
LHR9:40 amLondon Heathrow
24h 40m
2 stops
EZE7:20 amBuenos Aires Ministro Pistarini
Jan 20
EZE10:25 pmBuenos Aires Ministro Pistarini
28h 55m
1 stop
LHR6:20 amLondon Heathrow
$1,248
Find similar
Delta
Jan 11
LHR10:10 amLondon Heathrow
27h 05m
1 stop
EZE10:15 amBuenos Aires Ministro Pistarini
Jan 25
EZE10:25 pmBuenos Aires Ministro Pistarini
29h 30m
1 stop
LHR6:55 amLondon Heathrow
$1,249
Find similar
Delta
Dec 31
LHR9:40 amLondon Heathrow
26h 20m
2 stops
EZE9:00 amBuenos Aires Ministro Pistarini
Apr 17
EZE8:10 pmBuenos Aires Ministro Pistarini
32h 45m
2 stops
LHR8:55 amLondon Heathrow
$1,308
Find similar

British Airways flights from London Heathrow Airport to Buenos Aires

Our best British Airways deals on London Heathrow Airport to Buenos Aires flight tickets
British Airways
Mar 2
LHR10:00 pmLondon Heathrow
16h 45m
1 stop
EZE11:45 amBuenos Aires Ministro Pistarini
May 21
EZE12:25 pmBuenos Aires Ministro Pistarini
15h 45m
1 stop
LHR8:10 amLondon Heathrow
$1,129
Find similar
British Airways
Feb 10
LHR6:45 pmLondon Heathrow
26h 10m
1 stop
EZE5:55 pmBuenos Aires Ministro Pistarini
Feb 25
EZE10:45 pmBuenos Aires Ministro Pistarini
17h 05m
1 stop
LHR6:50 pmLondon Heathrow
$1,156
Find similar
British Airways
Mar 2
LHR10:00 pmLondon Heathrow
16h 45m
1 stop
EZE11:45 amBuenos Aires Ministro Pistarini
May 17
EZE9:40 pmBuenos Aires Ministro Pistarini
16h 35m
1 stop
LHR6:15 pmLondon Heathrow
$1,183
Find similar

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 December 28, 2025.
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

Mon 2/9

5:45 pm-10:25 pm

2 stops31h 40m

Buenos Aires Ministro Pistarini

Mon 2/16

11:55 pm-2:55 pm

2 stops36h 00m

$1,118

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 4/13

8:30 am-5:20 pm

2 stops36h 50m

Buenos Aires Jorge Newbery

Wed 4/29

1:30 pm-6:35 am

2 stops37h 05m

$1,120

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 3/2

10:00 pm-11:45 am

1 stop16h 45m

Buenos Aires Ministro Pistarini

Thu 5/21

12:25 pm-8:10 am

1 stop15h 45m

$1,129

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 2/3

12:05 pm-7:20 am

1 stop22h 15m

Buenos Aires Ministro Pistarini

Mon 2/23

10:05 pm-5:55 am

2 stops28h 50m

$1,130

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 4/9

10:05 pm-12:10 am

1 stop30h 05m

Buenos Aires Ministro Pistarini

Tue 4/21

4:45 pm-3:35 pm

1 stop18h 50m

$1,132

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 2/24

8:00 pm-10:25 pm

2 stops29h 25m

Buenos Aires Ministro Pistarini

Sat 3/7

11:55 pm-4:10 pm

2 stops37h 15m

$1,133

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 1/22

12:05 pm-9:20 am

1 stop24h 15m

Buenos Aires Ministro Pistarini

Thu 1/29

11:55 pm-10:15 am

1 stop31h 20m

$1,135

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Thu 3/19

8:15 pm-9:40 am

1 stop16h 25m

Buenos Aires Jorge Newbery

Sun 4/5

2:55 pm-3:05 pm

1 stop20h 10m

$1,160

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 4/6

10:05 pm-5:40 am

1 stop35h 35m

Buenos Aires Jorge Newbery

Mon 4/20

7:00 am-3:35 pm

1 stop28h 35m

$1,166

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sun 3/15

6:45 pm-4:00 pm

2 stops24h 15m

Buenos Aires Jorge Newbery

Mon 3/30

10:35 am-2:55 pm

2 stops24h 20m

$1,200

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 February. Flight prices, which tend to average around $1,178, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Buenos Aires from London Heathrow Airport during September instead. Flights to Buenos Aires in September, while not as cheap as those in February, still average around $1,201.

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 $1,379 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 39% 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 December 2025, prices for London Heathrow Airport to Buenos Aires flights are approximately 16% 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 35m

Direct flights

None
The fastest flight from London Heathrow Airport to Buenos Aires takes 16h 35m
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 35m.

  • 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