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Cheap flights from London Heathrow Airport to Buenos Aires from $629

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 9/2. 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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0 bags

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Find the cheapest flights from London Heathrow Airport to Buenos Aires

Cheap round-trip flights

 Logo
8:00 am - 6:40 amLHR-AEP
26h 40m2 stops
 Logo
12:05 am - 10:20 amAEP-LHR
30h 15m2 stops
$1,052
Find Deal
Tue, Oct 14 - Thu, Oct 23
Air Canada Logo
8:55 am - 3:10 pmLHR-EZE
33h 15m3 stops
Air Canada Logo
4:45 pm - 11:20 amEZE-LHR
39h 35m2 stops
$1,052Air Canada
Find Deal
Sun, Nov 16 - Mon, Feb 16
SWISS Logo
8:05 pm - 11:40 amLHR-AEP
42h 35m2 stops
SWISS Logo
2:55 pm - 1:00 pmAEP-LHR
19h 05m2 stops
$1,055SWISS
Find Deal
Mon, Nov 10 - Thu, Nov 13
Air Canada Logo
7:25 pm - 3:10 pmLHR-EZE
46h 45m3 stops
Air Canada Logo
4:45 pm - 11:20 amEZE-LHR
39h 35m2 stops
$1,055Air Canada
Find Deal
Mon, Nov 3 - Mon, Nov 17
 Logo
11:20 am - 6:35 pmLHR-AEP
35h 15m2 stops
 Logo
11:50 am - 5:45 pmAEP-LHR
25h 55m2 stops
$1,061
Find Deal
Tue, Oct 14 - Fri, Oct 24
United Airlines Logo
12:05 pm - 8:20 amLHR-EZE
23h 15m1 stop
United Airlines Logo
11:55 pm - 10:25 amEZE-LHR
31h 30m2 stops
$1,070United Airlines
Find Deal
Tue, Oct 28 - Tue, Nov 11
United Airlines Logo
10:00 am - 8:00 amLHR-EZE
26h 00m1 stop
United Airlines Logo
9:00 pm - 9:20 amEZE-LHR
32h 20m2 stops
$1,075United Airlines
Find Deal
Mon, Sep 1 - Mon, Sep 22
SWISS Logo
6:40 pm - 10:45 amLHR-EZE
20h 05m2 stops
SWISS Logo
1:30 pm - 5:50 pmEZE-LHR
24h 20m2 stops
$1,108SWISS
Find Deal
Fri, Sep 12 - Wed, Oct 22
Lufthansa Logo
10:30 am - 6:25 amLHR-EZE
23h 55m1 stop
Lufthansa Logo
5:45 pm - 4:50 pmEZE-LHR
20h 05m1 stop
$1,123Lufthansa
Find Deal
Wed, Aug 20 - Mon, Nov 10
Lufthansa Logo
7:30 pm - 6:25 amLHR-EZE
38h 55m1 stop
Lufthansa Logo
5:45 pm - 12:50 pmEZE-LHR
16h 05m1 stop
$1,142Lufthansa
Find Deal
Tue, Aug 19 - Sun, Nov 9

Air Canada flights from London Heathrow Airport to Buenos Aires

Our best Air Canada deals on London Heathrow Airport to Buenos Aires flight tickets
Air Canada
Nov 16
LHR8:55 amLondon Heathrow
33h 15m
3 stops
EZE3:10 pmBuenos Aires Ministro Pistarini
Feb 16
EZE4:45 pmBuenos Aires Ministro Pistarini
39h 35m
2 stops
LHR11:20 amLondon Heathrow
Air Canada
Nov 3
LHR7:25 pmLondon Heathrow
46h 45m
3 stops
EZE3:10 pmBuenos Aires Ministro Pistarini
Nov 17
EZE4:45 pmBuenos Aires Ministro Pistarini
39h 35m
2 stops
LHR11:20 amLondon Heathrow
Air Canada
Nov 16
LHR11:10 amLondon Heathrow
31h 00m
2 stops
EZE3:10 pmBuenos Aires Ministro Pistarini
Feb 16
EZE4:45 pmBuenos Aires Ministro Pistarini
36h 45m
2 stops
LHR8:30 amLondon Heathrow

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
Oct 28
LHR12:05 pmLondon Heathrow
23h 15m
1 stop
EZE8:20 amBuenos Aires Ministro Pistarini
Nov 11
EZE11:55 pmBuenos Aires Ministro Pistarini
31h 30m
2 stops
LHR10:25 amLondon Heathrow
United Airlines
Sep 1
LHR10:00 amLondon Heathrow
26h 00m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Sep 22
EZE9:00 pmBuenos Aires Ministro Pistarini
32h 20m
2 stops
LHR9:20 amLondon Heathrow
United Airlines
Oct 13
LHR1:40 pmLondon Heathrow
22h 20m
1 stop
EZE8:00 amBuenos Aires Ministro Pistarini
Oct 27
EZE9:05 pmBuenos Aires Ministro Pistarini
31h 25m
1 stop
LHR7:30 amLondon Heathrow

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 $1,123, 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 March instead. Flights to Buenos Aires in March, while not as cheap as those in January, still average around $1,150.

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 $1,334 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 $1,117 on momondo.

What cabin class options are available on London Heathrow to Buenos Aires flights?

There are 2 cabin classes 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 July 2025, prices for London Heathrow Airport to Buenos Aires flights are approximately 21% 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

Best Price Found

$629

Fastest flight time

16h 25m

Direct flights

None

Airports in Buenos Aires

2 airports
The best one-way flight to Buenos Aires from London Heathrow Airport in the past 72 hours is $629. The best round-trip flight deal from London Heathrow Airport to Buenos Aires found on momondo in the last 72 hours is $1,052.
The fastest flight from London Heathrow Airport to Buenos Aires takes 16h 25m
There are no direct flights from London Heathrow Airport to Buenos Aires. Popular non-direct routes for this connection are London Heathrow Airport - Buenos Aires Jorge Newbery Airport and London Heathrow Airport - Buenos Aires Ministro Pistarini Airport.
There are 2 airports near Buenos Aires: Buenos Aires Ministro Pistarini (EZE), Buenos Aires Jorge Newbery (AEP)

  • 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
2,820 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 2,820 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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Tue 7/8
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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