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Cheap flights from London Heathrow Airport to Buenos Aires from $720

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 10/1. 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

Avianca Logo
9:40 pm - 3:50 pmLHR-EZE
21h 10m1 stop
Avianca Logo
7:35 am - 2:35 pmEZE-LHR
28h 00m1 stop
$976Avianca
Find Deal
Mon, Nov 10 - Fri, Nov 28
Avianca Logo
9:40 pm - 3:50 pmLHR-EZE
21h 10m1 stop
Avianca Logo
7:35 am - 2:35 pmEZE-LHR
28h 00m1 stop
$977Avianca
Find Deal
Mon, Nov 10 - Fri, Nov 28
United Airlines Logo
4:40 pm - 8:20 amLHR-EZE
43h 40m2 stops
United Airlines Logo
11:55 pm - 7:30 amEZE-LHR
28h 35m1 stop
$1,060United Airlines
Find Deal
Sat, Oct 25 - Sun, Nov 23
United Airlines Logo
4:40 pm - 6:20 amLHR-EZE
41h 40m2 stops
United Airlines Logo
10:05 pm - 6:40 amEZE-LHR
29h 35m2 stops
$1,062United Airlines
Find Deal
Sat, Oct 25 - Wed, Nov 12
Logo
6:45 pm - 4:20 pmLHR-EZE
25h 35m1 stop
Logo
9:50 pm - 5:15 pmEZE-LHR
15h 25m1 stop
$1,106
Find Deal
Thu, Oct 9 - Thu, Oct 16
British Airways Logo
6:45 pm - 4:20 pmLHR-EZE
25h 35m1 stop
British Airways Logo
6:10 pm - 5:15 pmEZE-LHR
19h 05m1 stop
$1,130British Airways
Find Deal
Mon, Sep 29 - Sun, Oct 12
British Airways Logo
6:45 pm - 4:20 pmLHR-EZE
25h 35m1 stop
British Airways Logo
6:10 pm - 6:15 pmEZE-LHR
20h 05m1 stop
$1,131British Airways
Find Deal
Tue, Sep 30 - Sun, Oct 12
Logo
3:50 pm - 4:20 pmLHR-EZE
28h 30m1 stop
Logo
1:00 pm - 9:30 amEZE-LHR
16h 30m1 stop
$1,133
Find Deal
Fri, Oct 3 - Fri, Oct 17
Lufthansa Logo
3:30 pm - 7:55 amLHR-EZE
19h 25m1 stop
Lufthansa Logo
5:45 pm - 6:45 pmEZE-LHR
22h 00m1 stop
$1,162Lufthansa
Find Deal
Tue, Dec 30 - Thu, Jan 22
Lufthansa Logo
6:30 pm - 7:55 amLHR-EZE
16h 25m1 stop
Lufthansa Logo
5:45 pm - 12:50 pmEZE-LHR
16h 05m1 stop
$1,167Lufthansa
Find Deal
Sun, Jan 11 - Tue, Jan 20

Avianca flights from London Heathrow Airport to Buenos Aires

Our best Avianca deals on London Heathrow Airport to Buenos Aires flight tickets
Avianca
Nov 10
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Nov 28
EZE7:35 amBuenos Aires Ministro Pistarini
28h 00m
1 stop
LHR2:35 pmLondon Heathrow
$976
Find similar
Avianca
Nov 10
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Nov 28
EZE7:35 amBuenos Aires Ministro Pistarini
28h 00m
1 stop
LHR2:35 pmLondon Heathrow
$977
Find similar
Avianca
Nov 10
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Nov 28
EZE4:55 pmBuenos Aires Ministro Pistarini
18h 40m
1 stop
LHR2:35 pmLondon Heathrow
$979
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
Dec 30
LHR3:30 pmLondon Heathrow
19h 25m
1 stop
EZE7:55 amBuenos Aires Ministro Pistarini
Jan 22
EZE5:45 pmBuenos Aires Ministro Pistarini
22h 00m
1 stop
LHR6:45 pmLondon Heathrow
$1,162
Find similar
Lufthansa
Jan 11
LHR6:30 pmLondon Heathrow
16h 25m
1 stop
EZE7:55 amBuenos Aires Ministro Pistarini
Jan 20
EZE5:45 pmBuenos Aires Ministro Pistarini
16h 05m
1 stop
LHR12:50 pmLondon Heathrow
$1,167
Find similar
Lufthansa
Feb 11
LHR5:30 pmLondon Heathrow
17h 25m
1 stop
EZE7:55 amBuenos Aires Ministro Pistarini
Feb 16
EZE5:45 pmBuenos Aires Ministro Pistarini
16h 05m
1 stop
LHR12:50 pmLondon Heathrow
$1,182
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 September 11, 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

Mon 11/10

9:40 pm-3:50 pm

1 stop21h 10m

Buenos Aires Ministro Pistarini

Fri 11/28

7:35 am-2:35 pm

1 stop28h 00m

$976

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 11/10

9:40 pm-3:50 pm

1 stop21h 10m

Buenos Aires Ministro Pistarini

Fri 11/28

7:35 am-2:35 pm

1 stop28h 00m

$977

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 10/25

4:40 pm-8:20 am

2 stops43h 40m

Buenos Aires Ministro Pistarini

Sun 11/23

11:55 pm-7:30 am

1 stop28h 35m

$1,060

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 10/25

4:40 pm-6:20 am

2 stops41h 40m

Buenos Aires Ministro Pistarini

Wed 11/12

10:05 pm-6:40 am

2 stops29h 35m

$1,062

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 10/9

6:45 pm-4:20 pm

1 stop25h 35m

Buenos Aires Ministro Pistarini

Thu 10/16

9:50 pm-5:15 pm

1 stop15h 25m

$1,106

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 9/29

6:45 pm-4:20 pm

1 stop25h 35m

Buenos Aires Ministro Pistarini

Sun 10/12

6:10 pm-5:15 pm

1 stop19h 05m

$1,130

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 9/30

6:45 pm-4:20 pm

1 stop25h 35m

Buenos Aires Ministro Pistarini

Sun 10/12

6:10 pm-6:15 pm

1 stop20h 05m

$1,131

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 10/3

3:50 pm-4:20 pm

1 stop28h 30m

Buenos Aires Ministro Pistarini

Fri 10/17

1:00 pm-9:30 am

1 stop16h 30m

$1,133

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 12/30

3:30 pm-7:55 am

1 stop19h 25m

Buenos Aires Ministro Pistarini

Thu 1/22

5:45 pm-6:45 pm

1 stop22h 00m

$1,162

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 1/11

6:30 pm-7:55 am

1 stop16h 25m

Buenos Aires Ministro Pistarini

Tue 1/20

5:45 pm-12:50 pm

1 stop16h 05m

$1,167

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 January. Flight prices, which tend to average around $1,149, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, 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 January, still average around $1,160.

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 $1,356 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 $1,155 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 September 2025, prices for London Heathrow Airport to Buenos Aires flights are approximately 26% 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

Direct flights

None
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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  • 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
2,929 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 2,929 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