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Cheap flights from London Heathrow Airport to Buenos Aires from $498

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 5/13. 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.
Avianca Logo
10:05 pm - 3:40 pm
LHR
-
EZE
21h 35m
1 stop
Avianca Logo
4:50 pm - 3:35 pm
EZE
-
LHR
18h 45m
1 stop
$1,023Avianca
Thu, Apr 23 - Thu, May 14
Avianca Logo
10:05 pm - 3:40 pm
LHR
-
EZE
21h 35m
1 stop
Avianca Logo
4:50 pm - 3:35 pm
EZE
-
LHR
18h 45m
1 stop
$1,024Avianca
Thu, May 21 - Thu, May 28
Avianca Logo
10:05 pm - 12:25 am
LHR
-
EZE
30h 20m
1 stop
Avianca Logo
4:50 pm - 3:35 pm
EZE
-
LHR
18h 45m
1 stop
$1,046Avianca
Thu, Apr 23 - Thu, May 14
Avianca Logo
10:05 pm - 5:40 am
LHR
-
EZE
35h 35m
1 stop
Avianca Logo
1:35 am - 3:35 pm
EZE
-
LHR
34h 00m
1 stop
$1,059Avianca
Mon, Sep 7 - Sun, Sep 27
Lufthansa Logo
9:30 am - 6:25 am
LHR
-
EZE
24h 55m
1 stop
Lufthansa Logo
4:35 pm - 10:10 pm
EZE
-
LHR
25h 35m
1 stop
$1,138Lufthansa
Tue, Jun 23 - Fri, Jul 31
Multiple Airlines Logo
10:05 pm - 5:40 am
LHR
-
AEP
35h 35m
1 stop
Multiple Airlines Logo
9:45 pm - 3:05 pm
AEP
-
LHR
37h 20m
1 stop
$1,224Multiple Airlines
Mon, Jun 1 - Tue, Jun 16
British Airways Logo
6:15 am - 10:30 am
LHR
-
AEP
32h 15m
2 stops
British Airways Logo
11:45 am - 6:15 pm
AEP
-
LHR
27h 30m
2 stops
$1,229British Airways
Sun, Oct 4 - Sun, Nov 1
LATAM Airlines Logo
6:45 pm - 2:50 pm
LHR
-
AEP
24h 05m
2 stops
LATAM Airlines Logo
9:45 pm - 3:05 pm
AEP
-
LHR
37h 20m
1 stop
$1,233LATAM Airlines
Mon, Jun 1 - Tue, Jun 16
LATAM Airlines Logo
9:20 pm - 5:00 pm
LHR
-
AEP
23h 40m
2 stops
LATAM Airlines Logo
5:00 pm - 6:55 pm
AEP
-
LHR
21h 55m
2 stops
$1,272LATAM Airlines
Mon, Jun 1 - Tue, Jun 16
British Airways Logo
10:20 pm - 10:30 am
LHR
-
AEP
16h 10m
1 stop
British Airways Logo
10:45 am - 2:55 pm
AEP
-
LHR
24h 10m
2 stops
$1,281British Airways
Fri, May 29 - Wed, Jun 17

Avianca flights from London Heathrow Airport to Buenos Aires

Our best Avianca deals on London Heathrow Airport to Buenos Aires flight tickets
Avianca
Apr 23
LHR10:05 pmLondon Heathrow
21h 35m
1 stop
EZE3:40 pmBuenos Aires Ministro Pistarini
May 14
EZE4:50 pmBuenos Aires Ministro Pistarini
18h 45m
1 stop
LHR3:35 pmLondon Heathrow
$1,023
Avianca
May 21
LHR10:05 pmLondon Heathrow
21h 35m
1 stop
EZE3:40 pmBuenos Aires Ministro Pistarini
May 28
EZE4:50 pmBuenos Aires Ministro Pistarini
18h 45m
1 stop
LHR3:35 pmLondon Heathrow
$1,024
Avianca
Apr 23
LHR10:05 pmLondon Heathrow
30h 20m
1 stop
EZE12:25 amBuenos Aires Ministro Pistarini
May 14
EZE4:50 pmBuenos Aires Ministro Pistarini
18h 45m
1 stop
LHR3:35 pmLondon Heathrow
$1,046

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
Apr 18
LHR4:40 pmLondon Heathrow
43h 20m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
Apr 22
EZE9:00 pmBuenos Aires Ministro Pistarini
32h 40m
2 stops
LHR9:40 amLondon Heathrow
$1,278
United Airlines
Apr 15
LHR2:50 pmLondon Heathrow
45h 10m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
Apr 22
EZE9:00 pmBuenos Aires Ministro Pistarini
32h 40m
2 stops
LHR9:40 amLondon Heathrow
$1,279
United Airlines
Apr 17
LHR11:25 amLondon Heathrow
24h 35m
2 stops
EZE8:00 amBuenos Aires Ministro Pistarini
Apr 28
EZE9:00 pmBuenos Aires Ministro Pistarini
53h 55m
2 stops
LHR6:55 amLondon Heathrow
$1,349

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 April 9, 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
Quickest round-trip

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 4/23

10:05 pm-3:40 pm

1 stop21h 35m

Buenos Aires Ministro Pistarini

Thu 5/14

4:50 pm-3:35 pm

1 stop18h 45m

$1,023

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 5/21

10:05 pm-3:40 pm

1 stop21h 35m

Buenos Aires Ministro Pistarini

Thu 5/28

4:50 pm-3:35 pm

1 stop18h 45m

$1,024

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 4/23

10:05 pm-12:25 am

1 stop30h 20m

Buenos Aires Ministro Pistarini

Thu 5/14

4:50 pm-3:35 pm

1 stop18h 45m

$1,046

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 9/7

10:05 pm-5:40 am

1 stop35h 35m

Buenos Aires Ministro Pistarini

Sun 9/27

1:35 am-3:35 pm

1 stop34h 00m

$1,059

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 6/23

9:30 am-6:25 am

1 stop24h 55m

Buenos Aires Ministro Pistarini

Fri 7/31

4:35 pm-10:10 pm

1 stop25h 35m

$1,138

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 6/1

10:05 pm-5:40 am

1 stop35h 35m

Buenos Aires Jorge Newbery

Tue 6/16

9:45 pm-3:05 pm

1 stop37h 20m

$1,224

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sun 10/4

6:15 am-10:30 am

2 stops32h 15m

Buenos Aires Jorge Newbery

Sun 11/1

11:45 am-6:15 pm

2 stops27h 30m

$1,229

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 6/1

6:45 pm-2:50 pm

2 stops24h 05m

Buenos Aires Jorge Newbery

Tue 6/16

9:45 pm-3:05 pm

1 stop37h 20m

$1,233

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 6/1

9:20 pm-5:00 pm

2 stops23h 40m

Buenos Aires Jorge Newbery

Tue 6/16

5:00 pm-6:55 pm

2 stops21h 55m

$1,272

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Fri 5/29

10:20 pm-10:30 am

1 stop16h 10m

Buenos Aires Jorge Newbery

Wed 6/17

10:45 am-2:55 pm

2 stops24h 10m

$1,281

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 April instead. Flights to Buenos Aires in April, while not as cheap as those in May, still average around $1,228.

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 $1,367 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 $1,138 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 52% 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 April 2026, prices for London Heathrow Airport to Buenos Aires flights are approximately 43% 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 10m

Direct flights

Thu, Fri and Sat

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 Thursday, Friday and Saturday. 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).
Search flight deals

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