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Cheap flights from London Heathrow Airport to Buenos Aires from $529

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 3/15. 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

These are some of the best round-trip flight deals from London Heathrow Airport to Buenos Aires that have been recently found on momondo from popular airlines, departing in the coming months.
9:20 am - 6:20 amLHR-EZE
24h 00m1 stop
10:55 pm - 10:50 amEZE-LHR
32h 55m1 stop
$1,062United Airlines
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Fri, Mar 14 - Thu, Mar 20
4:20 pm - 6:20 amLHR-EZE
41h 00m2 stops
9:05 pm - 7:30 amEZE-LHR
31h 25m1 stop
$1,063United Airlines
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Thu, Mar 13 - Mon, Mar 17
11:45 am - 9:00 amLHR-EZE
24h 15m1 stop
11:59 pm - 6:50 amEZE-LHR
27h 51m1 stop
$1,107American Airlines
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Mon, Mar 17 - Mon, Mar 24
7:05 pm - 5:25 pmLHR-EZE
25h 20m1 stop
1:35 pm - 8:35 amEZE-LHR
16h 00m1 stop
$1,114British Airways
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Wed, Mar 19 - Sun, Mar 23
7:05 pm - 5:25 pmLHR-EZE
25h 20m1 stop
1:35 pm - 8:35 amEZE-LHR
16h 00m1 stop
$1,155British Airways
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Wed, Mar 12 - Wed, Mar 19
6:30 am - 9:45 amLHR-EZE
30h 15m2 stops
10:25 pm - 7:05 amEZE-LHR
29h 40m2 stops
$1,160Delta
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Tue, Mar 11 - Mon, Mar 24
10:10 am - 9:45 amLHR-EZE
26h 35m1 stop
10:25 pm - 10:30 amEZE-LHR
33h 05m1 stop
$1,167Delta
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Tue, Mar 11 - Wed, Mar 19
2:30 pm - 9:00 amLHR-EZE
21h 30m1 stop
10:25 pm - 7:05 amEZE-LHR
29h 40m2 stops
$1,168Delta
Find Deal
Thu, Mar 13 - Mon, Mar 24
8:05 pm - 10:45 amLHR-EZE
42h 40m2 stops
1:30 pm - 7:55 amEZE-LHR
38h 25m2 stops
$1,202SWISS
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Mon, May 5 - Wed, May 21
8:05 pm - 10:45 amLHR-EZE
42h 40m1 stop
1:30 pm - 4:35 pmEZE-LHR
23h 05m2 stops
$1,225SWISS
Find Deal
Mon, May 5 - Wed, May 21

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
Mar 14
LHR9:20 amLondon Heathrow
24h 00m
1 stop
EZE6:20 amBuenos Aires Ministro Pistarini
Mar 20
EZE10:55 pmBuenos Aires Ministro Pistarini
32h 55m
1 stop
LHR10:50 amLondon Heathrow
United Airlines
Mar 13
LHR4:20 pmLondon Heathrow
41h 00m
2 stops
EZE6:20 amBuenos Aires Ministro Pistarini
Mar 17
EZE9:05 pmBuenos Aires Ministro Pistarini
31h 25m
1 stop
LHR7:30 amLondon Heathrow
United Airlines
Mar 28
LHR9:20 amLondon Heathrow
24h 00m
1 stop
EZE6:20 amBuenos Aires Ministro Pistarini
Apr 2
EZE9:00 pmBuenos Aires Ministro Pistarini
34h 35m
1 stop
LHR11:35 amLondon Heathrow

British Airways flights from London Heathrow Airport to Buenos Aires

Our best British Airways deals on London Heathrow Airport to Buenos Aires flight tickets
British Airways
Mar 19
LHR7:05 pmLondon Heathrow
25h 20m
1 stop
EZE5:25 pmBuenos Aires Ministro Pistarini
Mar 23
EZE1:35 pmBuenos Aires Ministro Pistarini
16h 00m
1 stop
LHR8:35 amLondon Heathrow
British Airways
Mar 12
LHR7:05 pmLondon Heathrow
25h 20m
1 stop
EZE5:25 pmBuenos Aires Ministro Pistarini
Mar 19
EZE1:35 pmBuenos Aires Ministro Pistarini
16h 00m
1 stop
LHR8:35 amLondon Heathrow
British Airways
Mar 12
LHR5:25 pmLondon Heathrow
27h 00m
1 stop
EZE5:25 pmBuenos Aires Ministro Pistarini
Mar 25
EZE1:35 pmBuenos Aires Ministro Pistarini
16h 00m
1 stop
LHR8:35 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 March. Flight prices, which tend to average around $1,102, 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 April instead. Flights to Buenos Aires in April, while not as cheap as those in March, still average around $1,104.

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

On average, the least expensive day to fly to Buenos Aires from London Heathrow Airport is on a Thursday. momondo users have found tickets for Thursday departures for as low as $1,211. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Wednesday as prices are generally higher than usual. According to our data, the average ticket price to Buenos Aires on Wednesday is $1,433.

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 in the evening because they tend to be around $1,405. 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 3 weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,269 when searching 3 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 $1,134 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 February 2025, prices for London Heathrow Airport to Buenos Aires flights are approximately 26% 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

Best Price Found

$529

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 $529. The best round-trip flight deal from London Heathrow Airport to Buenos Aires found on momondo in the last 72 hours is $1,062.
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 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?

  • What is the most popular airline 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