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Cheap flights from London Heathrow Airport to Buenos Aires from $581

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 11/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from London Heathrow Airport to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
7:05 pm - 4:00 pm
LHR
-
AEP
23h 55m
2 stops
LATAM Airlines Logo
6:20 pm - 2:05 pm
AEP
-
LHR
16h 45m
1 stop
$1,177LATAM Airlines
Tue, Nov 24 - Mon, Dec 7
LATAM Airlines Logo
6:05 am - 6:20 am
LHR
-
EZE
27h 15m
2 stops
LATAM Airlines Logo
5:00 pm - 2:05 pm
EZE
-
LHR
18h 05m
1 stop
$1,177LATAM Airlines
Tue, Nov 24 - Sun, Dec 6
LATAM Airlines Logo
7:05 pm - 6:40 pm
LHR
-
AEP
26h 35m
2 stops
LATAM Airlines Logo
11:30 am - 2:05 pm
AEP
-
LHR
23h 35m
2 stops
$1,179LATAM Airlines
Tue, Nov 10 - Wed, Nov 25
Air Canada Logo
6:00 pm - 3:05 pm
LHR
-
EZE
24h 05m
2 stops
Air Canada Logo
4:45 pm - 11:20 am
EZE
-
LHR
39h 35m
2 stops
$1,184Air Canada
Fri, Nov 27 - Mon, Dec 7
British Airways Logo
9:45 pm - 10:45 am
LHR
-
EZE
17h 00m
1 stop
British Airways Logo
5:50 pm - 2:55 pm
EZE
-
LHR
17h 05m
1 stop
$1,185British Airways
Sat, Sep 5 - Sat, Sep 26
Avianca Logo
10:05 pm - 3:40 pm
LHR
-
EZE
21h 35m
1 stop
Avianca Logo
7:10 am - 3:35 pm
EZE
-
LHR
28h 25m
1 stop
$1,186Avianca
Fri, Aug 21 - Mon, Aug 24
British Airways Logo
8:00 pm - 4:05 pm
LHR
-
EZE
24h 05m
1 stop
British Airways Logo
1:00 pm - 10:35 am
EZE
-
LHR
17h 35m
1 stop
$1,187British Airways
Fri, Aug 21 - Tue, Sep 29
Multiple Airlines Logo
7:30 am - 6:25 am
LHR
-
EZE
26h 55m
1 stop
Multiple Airlines Logo
1:30 pm - 4:25 pm
EZE
-
LHR
22h 55m
2 stops
$1,188Multiple Airlines
Mon, Sep 7 - Wed, Sep 16
LATAM Airlines Logo
6:45 pm - 4:00 pm
LHR
-
AEP
24h 15m
2 stops
LATAM Airlines Logo
10:35 am - 12:45 pm
AEP
-
LHR
23h 10m
2 stops
$1,190LATAM Airlines
Tue, Nov 24 - Tue, Dec 8
Multiple Airlines Logo
6:00 pm - 3:50 pm
LHR
-
EZE
24h 50m
2 stops
Multiple Airlines Logo
4:45 pm - 7:10 am
EZE
-
LHR
35h 25m
2 stops
$1,194Multiple Airlines
Wed, Nov 4 - Wed, Nov 18

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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
Sep 5
LHR9:45 pmLondon Heathrow
17h 00m
1 stop
EZE10:45 amBuenos Aires Ministro Pistarini
Sep 26
EZE5:50 pmBuenos Aires Ministro Pistarini
17h 05m
1 stop
LHR2:55 pmLondon Heathrow
$1,185
British Airways
Aug 21
LHR8:00 pmLondon Heathrow
24h 05m
1 stop
EZE4:05 pmBuenos Aires Ministro Pistarini
Sep 29
EZE1:00 pmBuenos Aires Ministro Pistarini
17h 35m
1 stop
LHR10:35 amLondon Heathrow
$1,187
British Airways
Aug 22
LHR8:00 pmLondon Heathrow
24h 05m
1 stop
EZE4:05 pmBuenos Aires Ministro Pistarini
Oct 6
EZE5:50 pmBuenos Aires Ministro Pistarini
15h 45m
1 stop
LHR1:35 pmLondon Heathrow
$1,190

Delta flights from London Heathrow Airport to Buenos Aires

Our best Delta deals on London Heathrow Airport to Buenos Aires flight tickets
Delta
Aug 22
LHR9:40 amLondon Heathrow
28h 05m
2 stops
EZE9:45 amBuenos Aires Ministro Pistarini
Sep 6
EZE8:10 pmBuenos Aires Ministro Pistarini
30h 15m
1 stop
LHR6:25 amLondon Heathrow
$1,237
Delta
Aug 17
LHR1:25 pmLondon Heathrow
24h 20m
1 stop
EZE9:45 amBuenos Aires Ministro Pistarini
Aug 23
EZE8:10 pmBuenos Aires Ministro Pistarini
31h 00m
2 stops
LHR7:10 amLondon Heathrow
$1,239
Delta
Aug 17
LHR11:45 amLondon Heathrow
26h 00m
2 stops
EZE9:45 amBuenos Aires Ministro Pistarini
Aug 23
EZE8:10 pmBuenos Aires Ministro Pistarini
31h 00m
2 stops
LHR7:10 amLondon Heathrow
$1,240

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 June 29, 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

Cheapest round-trip

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Tue 11/24

7:05 pm-4:00 pm

2 stops23h 55m

Buenos Aires Jorge Newbery

Mon 12/7

6:20 pm-2:05 pm

1 stop16h 45m

$1,177

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 11/24

6:05 am-6:20 am

2 stops27h 15m

Buenos Aires Ministro Pistarini

Sun 12/6

5:00 pm-2:05 pm

1 stop18h 05m

$1,177

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Tue 11/10

7:05 pm-6:40 pm

2 stops26h 35m

Buenos Aires Jorge Newbery

Wed 11/25

11:30 am-2:05 pm

2 stops23h 35m

$1,179

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 11/27

6:00 pm-3:05 pm

2 stops24h 05m

Buenos Aires Ministro Pistarini

Mon 12/7

4:45 pm-11:20 am

2 stops39h 35m

$1,184
Quickest round-trip

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 9/5

9:45 pm-10:45 am

1 stop17h 00m

Buenos Aires Ministro Pistarini

Sat 9/26

5:50 pm-2:55 pm

1 stop17h 05m

$1,185

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 8/21

10:05 pm-3:40 pm

1 stop21h 35m

Buenos Aires Ministro Pistarini

Mon 8/24

7:10 am-3:35 pm

1 stop28h 25m

$1,186

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 8/21

8:00 pm-4:05 pm

1 stop24h 05m

Buenos Aires Ministro Pistarini

Tue 9/29

1:00 pm-10:35 am

1 stop17h 35m

$1,187

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 9/7

7:30 am-6:25 am

1 stop26h 55m

Buenos Aires Ministro Pistarini

Wed 9/16

1:30 pm-4:25 pm

2 stops22h 55m

$1,188

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Tue 11/24

6:45 pm-4:00 pm

2 stops24h 15m

Buenos Aires Jorge Newbery

Tue 12/8

10:35 am-12:45 pm

2 stops23h 10m

$1,190

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 11/4

6:00 pm-3:50 pm

2 stops24h 50m

Buenos Aires Ministro Pistarini

Wed 11/18

4:45 pm-7:10 am

2 stops35h 25m

$1,194

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 July. Flight prices, which tend to average around $158, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of July, then book flights to Buenos Aires from London Heathrow Airport during March instead. Flights to Buenos Aires in March, while not as cheap as those in July, still average around $231.

How far in advance should I book a flight from London Heathrow Airport 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 $1,409 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 $1,034 on momondo.

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

You could potentially save up to 45% 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 June 2026, prices for London Heathrow Airport to Buenos Aires flights are approximately 28% cheaper 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 10m

Direct flights

Mon, Wed and Thu

Airports in Buenos Aires

2 airports
The fastest flight from London Heathrow Airport to Buenos Aires takes 16h 10m
Direct flights go from London Heathrow Airport to Buenos Aires on Monday, Wednesday and Thursday. There are no airlines offering direct flights.
There are 2 airports in Buenos Aires. From London Heathrow Airport there are direct flights to Buenos Aires Ministro Pistarini (EZE).
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Frequently asked questions about flying from London Heathrow Airport to Buenos Aires

  • 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 10m.

  • 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