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Cheap flights from London Heathrow Airport to Buenos Aires from $633

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 4/9. 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
9:40 pm - 3:50 pmLHR-EZE
21h 10m1 stop
Avianca Logo
1:40 am - 2:35 pmEZE-LHR
33h 55m1 stop
$991Avianca
Find Deal
Sat, Mar 7 - Mon, Mar 23
Avianca Logo
9:40 pm - 3:50 pmLHR-EZE
21h 10m1 stop
Avianca Logo
1:40 am - 2:35 pmEZE-LHR
33h 55m1 stop
$992Avianca
Find Deal
Sat, Mar 7 - Mon, Mar 23
Turkish Airlines Logo
10:35 pm - 10:25 pmLHR-EZE
26h 50m2 stops
Turkish Airlines Logo
11:55 pm - 9:55 amEZE-LHR
31h 00m2 stops
$1,031Turkish Airlines
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Thu, Nov 6 - Tue, Nov 25
United Airlines Logo
9:10 am - 9:20 amLHR-EZE
27h 10m2 stops
United Airlines Logo
10:05 pm - 7:30 amEZE-LHR
30h 25m1 stop
$1,045United Airlines
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Wed, Jan 21 - Fri, Feb 20
United Airlines Logo
12:05 pm - 7:20 amLHR-EZE
22h 15m1 stop
United Airlines Logo
11:55 pm - 7:30 amEZE-LHR
28h 35m1 stop
$1,047United Airlines
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Sun, Nov 9 - Sun, Nov 23
Multiple Airlines Logo
6:40 pm - 11:50 amLHR-EZE
20h 10m2 stops
Multiple Airlines Logo
5:45 pm - 12:50 pmEZE-LHR
16h 05m1 stop
$1,079Multiple Airlines
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Tue, Nov 18 - Wed, Dec 10
SWISS Logo
8:05 pm - 11:50 amLHR-EZE
42h 45m2 stops
SWISS Logo
2:40 pm - 5:50 pmEZE-LHR
24h 10m2 stops
$1,083SWISS
Find Deal
Mon, Nov 17 - Wed, Nov 26
Turkish Airlines Logo
11:30 am - 10:25 pmLHR-EZE
37h 55m2 stops
Turkish Airlines Logo
11:55 pm - 10:25 pmEZE-LHR
43h 30m2 stops
$1,103Turkish Airlines
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Thu, Dec 4 - Tue, Dec 9
SWISS Logo
6:40 pm - 11:50 amLHR-EZE
20h 10m2 stops
SWISS Logo
2:40 pm - 4:20 pmEZE-LHR
22h 40m2 stops
$1,110SWISS
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Tue, Nov 18 - Wed, Dec 10
Multiple Airlines Logo
1:25 pm - 5:20 pmLHR-AEP
30h 55m2 stops
Multiple Airlines Logo
1:35 pm - 6:35 amAEP-LHR
37h 00m2 stops
$1,279Multiple Airlines
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Sun, Mar 15 - Sun, Mar 29

Avianca flights from London Heathrow Airport to Buenos Aires

Our best Avianca deals on London Heathrow Airport to Buenos Aires flight tickets
Avianca
Mar 7
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Mar 23
EZE1:40 amBuenos Aires Ministro Pistarini
33h 55m
1 stop
LHR2:35 pmLondon Heathrow
$991
Find similar
Avianca
Mar 7
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Mar 23
EZE1:40 amBuenos Aires Ministro Pistarini
33h 55m
1 stop
LHR2:35 pmLondon Heathrow
$992
Find similar
Avianca
Nov 18
LHR9:40 pmLondon Heathrow
35h 00m
1 stop
AEP5:40 amBuenos Aires Jorge Newbery
Nov 25
AEP7:00 amBuenos Aires Jorge Newbery
28h 35m
1 stop
LHR2:35 pmLondon Heathrow
$995
Find similar

SWISS flights from London Heathrow Airport to Buenos Aires

Our best SWISS deals on London Heathrow Airport to Buenos Aires flight tickets
SWISS
Nov 17
LHR8:05 pmLondon Heathrow
42h 45m
2 stops
EZE11:50 amBuenos Aires Ministro Pistarini
Nov 26
EZE2:40 pmBuenos Aires Ministro Pistarini
24h 10m
2 stops
LHR5:50 pmLondon Heathrow
$1,083
Find similar
SWISS
Nov 18
LHR6:40 pmLondon Heathrow
20h 10m
2 stops
EZE11:50 amBuenos Aires Ministro Pistarini
Dec 10
EZE2:40 pmBuenos Aires Ministro Pistarini
22h 40m
2 stops
LHR4:20 pmLondon Heathrow
$1,110
Find similar
SWISS
Nov 18
LHR6:40 pmLondon Heathrow
20h 10m
2 stops
EZE11:50 amBuenos Aires Ministro Pistarini
Nov 26
EZE2:40 pmBuenos Aires Ministro Pistarini
23h 00m
3 stops
LHR4:40 pmLondon Heathrow
$1,118
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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 October 16, 2025.
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

Sat 3/7

9:40 pm-3:50 pm

1 stop21h 10m

Buenos Aires Ministro Pistarini

Mon 3/23

1:40 am-2:35 pm

1 stop33h 55m

$991

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 3/7

9:40 pm-3:50 pm

1 stop21h 10m

Buenos Aires Ministro Pistarini

Mon 3/23

1:40 am-2:35 pm

1 stop33h 55m

$992

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 11/6

10:35 pm-10:25 pm

2 stops26h 50m

Buenos Aires Ministro Pistarini

Tue 11/25

11:55 pm-9:55 am

2 stops31h 00m

$1,031

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/21

9:10 am-9:20 am

2 stops27h 10m

Buenos Aires Ministro Pistarini

Fri 2/20

10:05 pm-7:30 am

1 stop30h 25m

$1,045

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 11/9

12:05 pm-7:20 am

1 stop22h 15m

Buenos Aires Ministro Pistarini

Sun 11/23

11:55 pm-7:30 am

1 stop28h 35m

$1,047

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 11/18

6:40 pm-11:50 am

2 stops20h 10m

Buenos Aires Ministro Pistarini

Wed 12/10

5:45 pm-12:50 pm

1 stop16h 05m

$1,079

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 11/17

8:05 pm-11:50 am

2 stops42h 45m

Buenos Aires Ministro Pistarini

Wed 11/26

2:40 pm-5:50 pm

2 stops24h 10m

$1,083

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 12/4

11:30 am-10:25 pm

2 stops37h 55m

Buenos Aires Ministro Pistarini

Tue 12/9

11:55 pm-10:25 pm

2 stops43h 30m

$1,103

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 11/18

6:40 pm-11:50 am

2 stops20h 10m

Buenos Aires Ministro Pistarini

Wed 12/10

2:40 pm-4:20 pm

2 stops22h 40m

$1,110

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sun 3/15

1:25 pm-5:20 pm

2 stops30h 55m

Buenos Aires Jorge Newbery

Sun 3/29

1:35 pm-6:35 am

2 stops37h 00m

$1,279

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 March. Flight prices, which tend to average around $1,169, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of March, then book flights to Buenos Aires from London Heathrow Airport during February instead. Flights to Buenos Aires in February, while not as cheap as those in March, still average around $1,173.

What is the cheapest time of day to depart on your flight to Buenos Aires?

Our most recent data shows that the best time of day to fly to Buenos Aires is in the afternoon. Flights from London Heathrow Airport to Buenos Aires during this time can be as low as $1,156. Try not to purchase tickets at noon because they tend to be around $1,377. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $1,365 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 $1,165 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.

How have London Heathrow Airport to Buenos Aires flight prices changed over time?

As of October 2025, prices for London Heathrow Airport to Buenos Aires flights are approximately 18% 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

17h 00m

Direct flights

Thu

Airports in Buenos Aires

1 airport
The fastest flight from London Heathrow Airport to Buenos Aires takes 17h 00m
Direct flights go from London Heathrow Airport to Buenos Aires on Thursday. There are no airlines offering direct flights.
There is 1 airport near Buenos Aires: Buenos Aires Ministro Pistarini (EZE)
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  • 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 many operators does momondo search for flights from London Heathrow Airport to Buenos Aires?

  • 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?

Best airlines flying from London Heathrow Airport to Buenos Aires

Compare and see reviews for airlines that fly from London Heathrow Airport to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
IberiaPriceFrom $1,021Free CancellationRating
7.0
2,992 reviews
Search Iberia flights

  • Iberia Flights From London Heathrow Airport to Buenos Aires

    Iberia operates around 5 flights from London Heathrow Airport to Buenos Aires every week. The average price of these flights found in the last 72 hours has been $1,299, but momondo users have found Iberia deals from London Heathrow Airport to Buenos Aires from as low as $1,021 round-trip. Iberia has been scored 7.0/10 in 2,992 reviews.

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