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Cheap flights from London Heathrow Airport to Buenos Aires from $584

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 8/30. 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.
Lufthansa Logo
11:30 am - 6:25 am
LHR
-
EZE
22h 55m
1 stop
Lufthansa Logo
4:35 pm - 10:10 pm
EZE
-
LHR
25h 35m
1 stop
$1,174Lufthansa
Tue, Aug 25 - Thu, Sep 17
Lufthansa Logo
6:30 am - 6:25 am
LHR
-
EZE
27h 55m
1 stop
Lufthansa Logo
4:35 pm - 12:40 pm
EZE
-
LHR
16h 05m
1 stop
$1,177Lufthansa
Mon, Jul 6 - Mon, Jul 13
Lufthansa Logo
8:30 am - 6:25 am
LHR
-
EZE
25h 55m
1 stop
Lufthansa Logo
4:35 pm - 5:40 pm
EZE
-
LHR
21h 05m
1 stop
$1,183Lufthansa
Sat, Jul 4 - Tue, Jul 7
Multiple Airlines Logo
6:30 am - 6:25 am
LHR
-
EZE
27h 55m
1 stop
Multiple Airlines Logo
1:30 pm - 4:25 pm
EZE
-
LHR
22h 55m
2 stops
$1,186Multiple Airlines
Wed, Jul 1 - Wed, Jul 29
Lufthansa Logo
6:30 am - 6:25 am
LHR
-
EZE
27h 55m
1 stop
Lufthansa Logo
4:35 pm - 12:40 pm
EZE
-
LHR
16h 05m
1 stop
$1,187Lufthansa
Mon, Jul 6 - Mon, Jul 13
British Airways Logo
8:00 pm - 4:05 pm
LHR
-
EZE
24h 05m
1 stop
British Airways Logo
12:25 pm - 8:10 am
EZE
-
LHR
15h 45m
1 stop
$1,193British Airways
Sun, Jul 5 - Wed, Jul 29
Air Canada Logo
9:30 am - 2:30 pm
LHR
-
EZE
33h 00m
3 stops
Air Canada Logo
4:35 pm - 6:30 am
EZE
-
LHR
33h 55m
3 stops
$1,195Air Canada
Wed, Oct 7 - Mon, Oct 19
British Airways Logo
5:10 pm - 10:30 am
LHR
-
AEP
21h 20m
2 stops
British Airways Logo
10:35 am - 1:30 pm
AEP
-
LHR
22h 55m
2 stops
$1,222British Airways
Tue, Sep 29 - Wed, Mar 31
TAP AIR PORTUGAL Logo
8:15 am - 10:50 am
LHR
-
AEP
29h 35m
2 stops
TAP AIR PORTUGAL Logo
11:50 am - 6:55 pm
AEP
-
LHR
28h 05m
2 stops
$1,229TAP AIR PORTUGAL
Fri, Nov 6 - Thu, Nov 26
TAP AIR PORTUGAL Logo
6:30 pm - 2:00 am
LHR
-
AEP
34h 30m
2 stops
TAP AIR PORTUGAL Logo
1:35 pm - 9:35 pm
AEP
-
LHR
29h 00m
2 stops
$1,233TAP AIR PORTUGAL
Mon, Nov 16 - Tue, Dec 8

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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
Nov 2
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Nov 20
EZE7:30 amBuenos Aires Ministro Pistarini
28h 05m
1 stop
LHR2:35 pmLondon Heathrow
$1,240
Avianca
Jun 24
LHR10:05 pmLondon Heathrow
35h 35m
1 stop
EZE5:40 amBuenos Aires Ministro Pistarini
Jun 26
EZE4:50 pmBuenos Aires Ministro Pistarini
18h 45m
1 stop
LHR3:35 pmLondon Heathrow
$1,241
Avianca
Oct 29
LHR9:40 pmLondon Heathrow
29h 55m
1 stop
EZE12:35 amBuenos Aires Ministro Pistarini
Nov 16
EZE7:30 amBuenos Aires Ministro Pistarini
28h 05m
1 stop
LHR2:35 pmLondon Heathrow
$1,242

SWISS flights from London Heathrow Airport to Buenos Aires

Our best SWISS deals on London Heathrow Airport to Buenos Aires flight tickets
SWISS
Nov 9
LHR8:05 pmLondon Heathrow
46h 45m
2 stops
EZE3:50 pmBuenos Aires Ministro Pistarini
Nov 25
EZE2:40 pmBuenos Aires Ministro Pistarini
19h 20m
2 stops
LHR1:00 pmLondon Heathrow
$1,253
SWISS
Sep 13
LHR8:05 pmLondon Heathrow
47h 40m
2 stops
EZE3:45 pmBuenos Aires Ministro Pistarini
Nov 2
EZE2:20 amBuenos Aires Ministro Pistarini
31h 40m
2 stops
LHR1:00 pmLondon Heathrow
$1,255
SWISS
Nov 9
LHR8:05 pmLondon Heathrow
42h 55m
2 stops
AEP12:00 pmBuenos Aires Jorge Newbery
Nov 19
AEP2:55 pmBuenos Aires Jorge Newbery
24h 45m
3 stops
LHR6:40 pmLondon Heathrow
$1,287

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 17, 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

Tue 8/25

11:30 am-6:25 am

1 stop22h 55m

Buenos Aires Ministro Pistarini

Thu 9/17

4:35 pm-10:10 pm

1 stop25h 35m

$1,174

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 7/6

6:30 am-6:25 am

1 stop27h 55m

Buenos Aires Ministro Pistarini

Mon 7/13

4:35 pm-12:40 pm

1 stop16h 05m

$1,177

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 7/4

8:30 am-6:25 am

1 stop25h 55m

Buenos Aires Ministro Pistarini

Tue 7/7

4:35 pm-5:40 pm

1 stop21h 05m

$1,183

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 7/1

6:30 am-6:25 am

1 stop27h 55m

Buenos Aires Ministro Pistarini

Wed 7/29

1:30 pm-4:25 pm

2 stops22h 55m

$1,186

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 7/6

6:30 am-6:25 am

1 stop27h 55m

Buenos Aires Ministro Pistarini

Mon 7/13

4:35 pm-12:40 pm

1 stop16h 05m

$1,187
Quickest round-trip

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 7/5

8:00 pm-4:05 pm

1 stop24h 05m

Buenos Aires Ministro Pistarini

Wed 7/29

12:25 pm-8:10 am

1 stop15h 45m

$1,193

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 10/7

9:30 am-2:30 pm

3 stops33h 00m

Buenos Aires Ministro Pistarini

Mon 10/19

4:35 pm-6:30 am

3 stops33h 55m

$1,195

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Tue 9/29

5:10 pm-10:30 am

2 stops21h 20m

Buenos Aires Jorge Newbery

Wed 3/31

10:35 am-1:30 pm

2 stops22h 55m

$1,222

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Fri 11/6

8:15 am-10:50 am

2 stops29h 35m

Buenos Aires Jorge Newbery

Thu 11/26

11:50 am-6:55 pm

2 stops28h 05m

$1,229

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 11/16

6:30 pm-2:00 am

2 stops34h 30m

Buenos Aires Jorge Newbery

Tue 12/8

1:35 pm-9:35 pm

2 stops29h 00m

$1,233

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 $1,398 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

None
The fastest flight from London Heathrow Airport to Buenos Aires takes 16h 10m
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 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