Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London Heathrow Airport to Buenos Aires from $614

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 11/18. 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.
Avianca Logo
10:05 pm - 12:25 am
LHR
-
EZE
30h 20m
1 stop
Avianca Logo
7:10 am - 3:35 pm
EZE
-
LHR
28h 25m
1 stop
$1,145Avianca
Sat, Aug 29 - Mon, Sep 14
Avianca Logo
10:05 pm - 5:40 am
LHR
-
AEP
35h 35m
1 stop
Avianca Logo
7:00 am - 3:35 pm
AEP
-
LHR
28h 35m
1 stop
$1,154Avianca
Sat, Aug 29 - Mon, Sep 14
Multiple Airlines Logo
9:40 pm - 3:50 pm
LHR
-
EZE
21h 10m
1 stop
Multiple Airlines Logo
7:30 am - 8:25 am
EZE
-
LHR
21h 55m
2 stops
$1,155Multiple Airlines
Wed, Nov 4 - Wed, Nov 18
Multiple Airlines Logo
9:40 pm - 3:50 pm
LHR
-
EZE
21h 10m
1 stop
Multiple Airlines Logo
7:30 am - 8:25 am
EZE
-
LHR
21h 55m
2 stops
$1,158Multiple Airlines
Thu, Oct 29 - Sat, Nov 14
Lufthansa Logo
8:45 am - 7:50 pm
LHR
-
EZE
38h 05m
2 stops
Lufthansa Logo
5:45 pm - 2:45 pm
EZE
-
LHR
18h 00m
1 stop
$1,161Lufthansa
Mon, Nov 16 - Wed, Nov 25
Lufthansa Logo
7:30 am - 6:25 am
LHR
-
EZE
26h 55m
1 stop
Lufthansa Logo
4:35 pm - 5:40 pm
EZE
-
LHR
21h 05m
1 stop
$1,184Lufthansa
Sun, Aug 23 - Wed, Sep 30
LATAM Airlines Logo
8:15 pm - 2:00 pm
LHR
-
AEP
20h 45m
1 stop
LATAM Airlines Logo
6:20 pm - 2:05 pm
AEP
-
LHR
16h 45m
1 stop
$1,210LATAM Airlines
Mon, Nov 16 - Wed, Nov 25
LATAM Airlines Logo
8:15 pm - 2:00 pm
LHR
-
AEP
20h 45m
1 stop
LATAM Airlines Logo
9:25 am - 2:05 pm
AEP
-
LHR
25h 40m
2 stops
$1,211LATAM Airlines
Mon, Nov 16 - Wed, Nov 25
TAP AIR PORTUGAL Logo
6:00 am - 9:20 am
LHR
-
AEP
30h 20m
2 stops
TAP AIR PORTUGAL Logo
11:50 am - 6:55 pm
AEP
-
LHR
28h 05m
2 stops
$1,228TAP AIR PORTUGAL
Fri, Nov 6 - Thu, Nov 26
TAP AIR PORTUGAL Logo
6:00 am - 9:20 am
LHR
-
AEP
30h 20m
2 stops
TAP AIR PORTUGAL Logo
10:30 am - 5:30 pm
AEP
-
LHR
28h 00m
2 stops
$1,229TAP AIR PORTUGAL
Fri, Oct 30 - Mon, Nov 16

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

KLM flights from London Heathrow Airport to Buenos Aires

Our best KLM deals on London Heathrow Airport to Buenos Aires flight tickets
KLM
Aug 26
LHR5:10 pmLondon Heathrow
16h 40m
1 stop
EZE5:50 amBuenos Aires Ministro Pistarini
Oct 1
EZE3:05 pmBuenos Aires Ministro Pistarini
18h 45m
1 stop
LHR1:50 pmLondon Heathrow
$1,210
KLM
Aug 24
LHR6:30 amLondon Heathrow
19h 20m
2 stops
EZE9:50 pmBuenos Aires Ministro Pistarini
Oct 1
EZE3:05 pmBuenos Aires Ministro Pistarini
15h 40m
1 stop
LHR10:45 amLondon Heathrow
$1,271

American Airlines flights from London Heathrow Airport to Buenos Aires

Our best American Airlines deals on London Heathrow Airport to Buenos Aires flight tickets
American Airlines
Oct 9
LHR3:40 pmLondon Heathrow
21h 10m
1 stop
EZE8:50 amBuenos Aires Ministro Pistarini
Oct 16
EZE9:10 pmBuenos Aires Ministro Pistarini
29h 15m
1 stop
LHR6:25 amLondon Heathrow
$1,218
American Airlines
Jul 17
LHR2:10 pmLondon Heathrow
24h 55m
1 stop
EZE11:05 amBuenos Aires Ministro Pistarini
Sep 1
EZE9:05 pmBuenos Aires Ministro Pistarini
29h 35m
1 stop
LHR6:40 amLondon Heathrow
$1,752

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 July 11, 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

Sat 8/29

10:05 pm-12:25 am

1 stop30h 20m

Buenos Aires Ministro Pistarini

Mon 9/14

7:10 am-3:35 pm

1 stop28h 25m

$1,145

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sat 8/29

10:05 pm-5:40 am

1 stop35h 35m

Buenos Aires Jorge Newbery

Mon 9/14

7:00 am-3:35 pm

1 stop28h 35m

$1,154

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 11/4

9:40 pm-3:50 pm

1 stop21h 10m

Buenos Aires Ministro Pistarini

Wed 11/18

7:30 am-8:25 am

2 stops21h 55m

$1,155

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 10/29

9:40 pm-3:50 pm

1 stop21h 10m

Buenos Aires Ministro Pistarini

Sat 11/14

7:30 am-8:25 am

2 stops21h 55m

$1,158

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 11/16

8:45 am-7:50 pm

2 stops38h 05m

Buenos Aires Ministro Pistarini

Wed 11/25

5:45 pm-2:45 pm

1 stop18h 00m

$1,161

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 8/23

7:30 am-6:25 am

1 stop26h 55m

Buenos Aires Ministro Pistarini

Wed 9/30

4:35 pm-5:40 pm

1 stop21h 05m

$1,184
Quickest round-trip

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 11/16

8:15 pm-2:00 pm

1 stop20h 45m

Buenos Aires Jorge Newbery

Wed 11/25

6:20 pm-2:05 pm

1 stop16h 45m

$1,210

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 11/16

8:15 pm-2:00 pm

1 stop20h 45m

Buenos Aires Jorge Newbery

Wed 11/25

9:25 am-2:05 pm

2 stops25h 40m

$1,211

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Fri 11/6

6:00 am-9:20 am

2 stops30h 20m

Buenos Aires Jorge Newbery

Thu 11/26

11:50 am-6:55 pm

2 stops28h 05m

$1,228

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Fri 10/30

6:00 am-9:20 am

2 stops30h 20m

Buenos Aires Jorge Newbery

Mon 11/16

10:30 am-5:30 pm

2 stops28h 00m

$1,229

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $1,400 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 July 2026, prices for London Heathrow Airport to Buenos Aires flights are approximately 9% 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

15h 25m

Direct flights

Thu

Airports in Buenos Aires

2 airports
The fastest flight from London Heathrow Airport to Buenos Aires takes 15h 25m
Direct flights go from London Heathrow Airport to Buenos Aires on Thursday. 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 15h 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.

An easier way to manage your Buenos Aires trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 8/10
Mon 8/17
By creating a price alert you accept our terms of use and privacy policy.

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