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Cheap flights from London Heathrow Airport to Buenos Aires from $698

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 11/27. 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.
Avianca Logo
9:40 pm - 3:50 pm
LHR
-
EZE
21h 10m
1 stop
Avianca Logo
4:55 pm - 2:35 pm
EZE
-
LHR
18h 40m
1 stop
$1,138Avianca
Sat, Jan 9 - Sat, Jan 30
Avianca Logo
9:40 pm - 3:50 pm
LHR
-
EZE
21h 10m
1 stop
Avianca Logo
1:40 am - 2:35 pm
EZE
-
LHR
33h 55m
1 stop
$1,161Avianca
Sat, Jan 9 - Wed, Feb 3
Avianca Logo
9:40 pm - 5:40 am
LHR
-
AEP
35h 00m
1 stop
Avianca Logo
7:00 am - 2:35 pm
AEP
-
LHR
28h 35m
1 stop
$1,165Avianca
Fri, Dec 25 - Tue, Feb 2
Avianca Logo
9:40 pm - 5:50 am
LHR
-
EZE
35h 10m
1 stop
Avianca Logo
4:55 pm - 2:35 pm
EZE
-
LHR
18h 40m
1 stop
$1,165Avianca
Fri, Dec 25 - Mon, Feb 1
LATAM Airlines Logo
8:15 pm - 2:00 pm
LHR
-
AEP
20h 45m
1 stop
LATAM Airlines Logo
6:20 pm - 2:05 pm
AEP
-
LHR
16h 45m
1 stop
$1,201LATAM Airlines
Mon, Nov 16 - Wed, Nov 25
Air Canada Logo
3:00 pm - 3:05 pm
LHR
-
EZE
27h 05m
2 stops
Air Canada Logo
4:45 pm - 8:30 am
EZE
-
LHR
36h 45m
2 stops
$1,203Air Canada
Thu, Dec 10 - Wed, Jan 20
LATAM Airlines Logo
7:05 pm - 9:18 am
LHR
-
EZE
41h 13m
2 stops
LATAM Airlines Logo
5:00 pm - 2:05 pm
EZE
-
LHR
18h 05m
1 stop
$1,214LATAM Airlines
Sun, Nov 8 - Sat, Nov 28
British Airways Logo
6:45 pm - 5:25 pm
LHR
-
EZE
25h 40m
1 stop
British Airways Logo
1:35 pm - 8:20 am
EZE
-
LHR
15h 45m
1 stop
$1,222British Airways
Fri, Nov 13 - Thu, Dec 17
TAP AIR PORTUGAL Logo
8:15 am - 9:20 am
LHR
-
AEP
28h 05m
2 stops
TAP AIR PORTUGAL Logo
1:35 pm - 6:55 pm
AEP
-
LHR
26h 20m
2 stops
$1,229TAP AIR PORTUGAL
Mon, Nov 16 - Wed, Nov 25
TAP AIR PORTUGAL Logo
8:15 am - 9:20 am
LHR
-
AEP
28h 05m
2 stops
TAP AIR PORTUGAL Logo
10:30 am - 9:35 pm
AEP
-
LHR
32h 05m
2 stops
$1,235TAP AIR PORTUGAL
Mon, Nov 16 - Wed, Nov 25

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Avianca flights from London Heathrow Airport to Buenos Aires

Our best Avianca deals on London Heathrow Airport to Buenos Aires flight tickets
Avianca
Jan 9
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Jan 30
EZE4:55 pmBuenos Aires Ministro Pistarini
18h 40m
1 stop
LHR2:35 pmLondon Heathrow
$1,138
Avianca
Jan 9
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Feb 3
EZE1:40 amBuenos Aires Ministro Pistarini
33h 55m
1 stop
LHR2:35 pmLondon Heathrow
$1,161
Avianca
Dec 25
LHR9:40 pmLondon Heathrow
35h 10m
1 stop
EZE5:50 amBuenos Aires Ministro Pistarini
Feb 1
EZE4:55 pmBuenos Aires Ministro Pistarini
18h 40m
1 stop
LHR2:35 pmLondon Heathrow
$1,165

LATAM Airlines flights from London Heathrow Airport to Buenos Aires

Our best LATAM Airlines deals on London Heathrow Airport to Buenos Aires flight tickets
LATAM Airlines
Nov 8
LHR7:05 pmLondon Heathrow
41h 13m
2 stops
EZE9:18 amBuenos Aires Ministro Pistarini
Nov 28
EZE5:00 pmBuenos Aires Ministro Pistarini
18h 05m
1 stop
LHR2:05 pmLondon Heathrow
$1,214
LATAM Airlines
Nov 8
LHR6:15 amLondon Heathrow
30h 03m
2 stops
EZE9:18 amBuenos Aires Ministro Pistarini
Nov 28
EZE5:00 pmBuenos Aires Ministro Pistarini
18h 05m
1 stop
LHR2:05 pmLondon Heathrow
$1,217
LATAM Airlines
Nov 16
LHR8:15 pmLondon Heathrow
26h 45m
1 stop
AEP8:00 pmBuenos Aires Jorge Newbery
Nov 25
AEP6:20 pmBuenos Aires Jorge Newbery
16h 45m
1 stop
LHR2:05 pmLondon Heathrow
$1,223

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 July 21, 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 - EZE

LHREZE

London Heathrow

Sat 1/9

9:40 pm-3:50 pm

1 stop21h 10m

Buenos Aires Ministro Pistarini

Sat 1/30

4:55 pm-2:35 pm

1 stop18h 40m

$1,138

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 1/9

9:40 pm-3:50 pm

1 stop21h 10m

Buenos Aires Ministro Pistarini

Wed 2/3

1:40 am-2:35 pm

1 stop33h 55m

$1,161

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Fri 12/25

9:40 pm-5:40 am

1 stop35h 00m

Buenos Aires Jorge Newbery

Tue 2/2

7:00 am-2:35 pm

1 stop28h 35m

$1,165

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 12/25

9:40 pm-5:50 am

1 stop35h 10m

Buenos Aires Ministro Pistarini

Mon 2/1

4:55 pm-2:35 pm

1 stop18h 40m

$1,165
Quickest round-trip

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 11/16

8:15 pm-2:00 pm

1 stop20h 45m

Buenos Aires Jorge Newbery

Wed 11/25

6:20 pm-2:05 pm

1 stop16h 45m

$1,201

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 12/10

3:00 pm-3:05 pm

2 stops27h 05m

Buenos Aires Ministro Pistarini

Wed 1/20

4:45 pm-8:30 am

2 stops36h 45m

$1,203

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 11/8

7:05 pm-9:18 am

2 stops41h 13m

Buenos Aires Ministro Pistarini

Sat 11/28

5:00 pm-2:05 pm

1 stop18h 05m

$1,214

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 11/13

6:45 pm-5:25 pm

1 stop25h 40m

Buenos Aires Ministro Pistarini

Thu 12/17

1:35 pm-8:20 am

1 stop15h 45m

$1,222

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 11/16

8:15 am-9:20 am

2 stops28h 05m

Buenos Aires Jorge Newbery

Wed 11/25

1:35 pm-6:55 pm

2 stops26h 20m

$1,229

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 11/16

8:15 am-9:20 am

2 stops28h 05m

Buenos Aires Jorge Newbery

Wed 11/25

10:30 am-9:35 pm

2 stops32h 05m

$1,235

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 $1,122, 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 October instead. Flights to Buenos Aires in October, while not as cheap as those in May, still average around $1,244.

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 $1,399 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 $1,075 on momondo.

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

You could potentially save up to 44% 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 July 2026, prices for London Heathrow Airport to Buenos Aires flights are approximately 16% 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

19h 00m

Direct flights

None
The fastest flight from London Heathrow Airport to Buenos Aires takes 19h 00m
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.
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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 19h 00m.

  • 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