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Cheap flights from London Heathrow Airport to Buenos Aires from $618

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 1/21. 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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0 bags

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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.
Lufthansa Logo
7:30 am - 6:25 am
LHR
-
EZE
26h 55m1 stop
Lufthansa Logo
4:35 pm - 4:40 pm
EZE
-
LHR
20h 05m1 stop
$1,111Lufthansa
Thu, Jun 4 - Wed, Jun 10
Turkish Airlines Logo
10:35 pm - 10:25 pm
LHR
-
EZE
27h 50m2 stops
Turkish Airlines Logo
11:55 pm - 3:10 pm
EZE
-
LHR
35h 15m2 stops
$1,118Turkish Airlines
Mon, May 4 - Thu, Jun 4
Multiple Airlines Logo
9:15 pm - 9:00 pm
LHR
-
AEP
26h 45m1 stop
Multiple Airlines Logo
9:00 am - 6:45 am
AEP
-
LHR
18h 45m1 stop
$1,121Multiple Airlines
Sat, Mar 7 - Tue, Mar 24
Multiple Airlines Logo
9:15 pm - 5:20 pm
LHR
-
AEP
23h 05m1 stop
Multiple Airlines Logo
9:00 am - 6:45 am
AEP
-
LHR
18h 45m1 stop
$1,123Multiple Airlines
Sat, Mar 7 - Tue, Mar 24
Lufthansa Logo
6:30 pm - 7:55 am
LHR
-
EZE
16h 25m1 stop
Lufthansa Logo
5:45 pm - 3:50 pm
EZE
-
LHR
19h 05m1 stop
$1,123Lufthansa
Mon, Jan 19 - Wed, Feb 11
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
$1,126United Airlines
Tue, Feb 3 - Wed, Feb 18
Avianca Logo
10:05 pm - 3:20 pm
LHR
-
EZE
21h 15m1 stop
Avianca Logo
4:45 pm - 3:35 pm
EZE
-
LHR
18h 50m1 stop
$1,127Avianca
Wed, Apr 8 - Tue, Apr 14
United Airlines Logo
7:25 am - 9:20 am
LHR
-
EZE
28h 55m2 stops
United Airlines Logo
10:05 pm - 5:55 am
EZE
-
LHR
28h 50m2 stops
$1,128United Airlines
Wed, Feb 4 - Mon, Feb 23
British Airways Logo
9:45 pm - 10:45 am
LHR
-
EZE
17h 00m1 stop
British Airways Logo
12:25 pm - 8:10 am
EZE
-
LHR
15h 45m1 stop
$1,129British Airways
Fri, Apr 24 - Mon, May 25
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
$1,174Avianca
Wed, Apr 8 - Wed, Apr 15

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
Feb 3
LHR12:05 pmLondon Heathrow
24h 15m
1 stop
EZE9:20 amBuenos Aires Ministro Pistarini
Feb 18
EZE11:55 pmBuenos Aires Ministro Pistarini
31h 20m
1 stop
LHR10:15 amLondon Heathrow
$1,126
Find similar
United Airlines
Feb 4
LHR7:25 amLondon Heathrow
28h 55m
2 stops
EZE9:20 amBuenos Aires Ministro Pistarini
Feb 23
EZE10:05 pmBuenos Aires Ministro Pistarini
28h 50m
2 stops
LHR5:55 amLondon Heathrow
$1,128
Find similar
United Airlines
Jan 28
LHR6:30 amLondon Heathrow
29h 50m
2 stops
EZE9:20 amBuenos Aires Ministro Pistarini
Feb 4
EZE10:05 pmBuenos Aires Ministro Pistarini
30h 25m
1 stop
LHR7:30 amLondon Heathrow
$1,137
Find similar

Lufthansa flights from London Heathrow Airport to Buenos Aires

Our best Lufthansa deals on London Heathrow Airport to Buenos Aires flight tickets
Lufthansa
Jun 4
LHR7:30 amLondon Heathrow
26h 55m
1 stop
EZE6:25 amBuenos Aires Ministro Pistarini
Jun 10
EZE4:35 pmBuenos Aires Ministro Pistarini
20h 05m
1 stop
LHR4:40 pmLondon Heathrow
$1,111
Find similar
Lufthansa
Jan 19
LHR6:30 pmLondon Heathrow
16h 25m
1 stop
EZE7:55 amBuenos Aires Ministro Pistarini
Feb 11
EZE5:45 pmBuenos Aires Ministro Pistarini
19h 05m
1 stop
LHR3:50 pmLondon Heathrow
$1,123
Find similar
Lufthansa
Jan 22
LHR3:30 pmLondon Heathrow
19h 25m
1 stop
EZE7:55 amBuenos Aires Ministro Pistarini
Feb 11
EZE5:45 pmBuenos Aires Ministro Pistarini
20h 05m
1 stop
LHR4:50 pmLondon Heathrow
$1,124
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 January 2, 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

Thu 6/4

7:30 am-6:25 am

1 stop26h 55m

Buenos Aires Ministro Pistarini

Wed 6/10

4:35 pm-4:40 pm

1 stop20h 05m

$1,111

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 5/4

10:35 pm-10:25 pm

2 stops27h 50m

Buenos Aires Ministro Pistarini

Thu 6/4

11:55 pm-3:10 pm

2 stops35h 15m

$1,118

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sat 3/7

9:15 pm-9:00 pm

1 stop26h 45m

Buenos Aires Jorge Newbery

Tue 3/24

9:00 am-6:45 am

1 stop18h 45m

$1,121

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sat 3/7

9:15 pm-5:20 pm

1 stop23h 05m

Buenos Aires Jorge Newbery

Tue 3/24

9:00 am-6:45 am

1 stop18h 45m

$1,123

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 1/19

6:30 pm-7:55 am

1 stop16h 25m

Buenos Aires Ministro Pistarini

Wed 2/11

5:45 pm-3:50 pm

1 stop19h 05m

$1,123

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 2/3

12:05 pm-9:20 am

1 stop24h 15m

Buenos Aires Ministro Pistarini

Wed 2/18

11:55 pm-10:15 am

1 stop31h 20m

$1,126

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 4/8

10:05 pm-3:20 pm

1 stop21h 15m

Buenos Aires Ministro Pistarini

Tue 4/14

4:45 pm-3:35 pm

1 stop18h 50m

$1,127

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 2/4

7:25 am-9:20 am

2 stops28h 55m

Buenos Aires Ministro Pistarini

Mon 2/23

10:05 pm-5:55 am

2 stops28h 50m

$1,128

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 4/24

9:45 pm-10:45 am

1 stop17h 00m

Buenos Aires Ministro Pistarini

Mon 5/25

12:25 pm-8:10 am

1 stop15h 45m

$1,129

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 4/8

10:05 pm-5:40 am

1 stop35h 35m

Buenos Aires Jorge Newbery

Wed 4/15

7:00 am-3:35 pm

1 stop28h 35m

$1,174

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 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 January 2026, prices for London Heathrow Airport to Buenos Aires flights are approximately 14% 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