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Cheap flights from London to Buenos Aires from $620

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 to Buenos Aires departing on 4/6. 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 to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
Turkish Airlines Logo
11:30 am - 10:25 pmLHR-EZE
37h 55m2 stops
Turkish Airlines Logo
11:55 pm - 3:20 pmEZE-LHR
35h 25m2 stops
$1,073Turkish Airlines
Find Deal
Tue, Mar 10 - Sun, Mar 29
Turkish Airlines Logo
11:30 am - 10:25 pmLHR-EZE
37h 55m2 stops
Turkish Airlines Logo
11:55 pm - 3:20 pmEZE-LHR
35h 25m2 stops
$1,074Turkish Airlines
Find Deal
Wed, Mar 4 - Thu, Jun 4
Avianca Logo
9:40 pm - 3:50 pmLHR-EZE
21h 10m1 stop
Avianca Logo
1:40 am - 2:35 pmEZE-LHR
33h 55m1 stop
$1,077Avianca
Find Deal
Thu, Feb 26 - Wed, Mar 18
Avianca Logo
10:05 pm - 5:40 amLHR-AEP
35h 35m1 stop
Avianca Logo
7:00 am - 3:35 pmAEP-LHR
28h 35m1 stop
$1,087Avianca
Find Deal
Fri, Apr 10 - Wed, Apr 15
Multiple Airlines Logo
9:40 pm - 3:50 pmLHR-EZE
21h 10m1 stop
Multiple Airlines Logo
7:30 am - 8:25 amEZE-LHR
21h 55m2 stops
$1,087Multiple Airlines
Find Deal
Tue, Feb 3 - Wed, Feb 11
Multiple Airlines Logo
4:30 pm - 7:55 amLHR-EZE
18h 25m1 stop
Multiple Airlines Logo
2:40 pm - 1:00 pmEZE-LHR
19h 20m2 stops
$1,090Multiple Airlines
Find Deal
Tue, Jan 13 - Wed, Feb 4
British Airways Logo
7:40 pm - 5:55 pmLGW-EZE
25h 15m1 stop
British Airways Logo
9:40 pm - 8:00 pmEZE-LGW
18h 20m1 stop
$1,105British Airways
Find Deal
Tue, Mar 3 - Tue, Jun 2
British Airways Logo
5:25 pm - 5:55 pmLHR-EZE
27h 30m1 stop
British Airways Logo
9:40 pm - 6:15 pmEZE-LHR
16h 35m1 stop
$1,109British Airways
Find Deal
Tue, Mar 3 - Tue, Jun 2
Air Europa Logo
10:00 am - 8:50 amLGW-EZE
25h 50m1 stop
Air Europa Logo
12:10 pm - 9:00 amEZE-LGW
16h 50m1 stop
$1,141Air Europa
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Sun, Mar 15 - Sun, Mar 29
Air Europa Logo
10:00 am - 8:50 amLGW-EZE
25h 50m1 stop
Air Europa Logo
12:25 pm - 3:25 pmEZE-LGW
24h 00m1 stop
$1,212Air Europa
Find Deal
Mon, Mar 9 - Sat, Mar 28

Turkish Airlines flights from London to Buenos Aires

Our best Turkish Airlines deals on London to Buenos Aires flight tickets
Turkish Airlines
Mar 10
LHR11:30 amLondon Heathrow
37h 55m
2 stops
EZE10:25 pmBuenos Aires Ministro Pistarini
Mar 29
EZE11:55 pmBuenos Aires Ministro Pistarini
35h 25m
2 stops
LHR3:20 pmLondon Heathrow
$1,073
Find similar
Turkish Airlines
Mar 4
LHR11:30 amLondon Heathrow
37h 55m
2 stops
EZE10:25 pmBuenos Aires Ministro Pistarini
Jun 4
EZE11:55 pmBuenos Aires Ministro Pistarini
35h 25m
2 stops
LHR3:20 pmLondon Heathrow
$1,074
Find similar
Turkish Airlines
Mar 15
LGW6:20 amLondon Gatwick
43h 05m
2 stops
EZE10:25 pmBuenos Aires Ministro Pistarini
Mar 29
EZE11:55 pmBuenos Aires Ministro Pistarini
36h 25m
2 stops
LGW4:20 pmLondon Gatwick
$1,075
Find similar

Avianca flights from London to Buenos Aires

Our best Avianca deals on London to Buenos Aires flight tickets
Avianca
Feb 26
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Mar 18
EZE1:40 amBuenos Aires Ministro Pistarini
33h 55m
1 stop
LHR2:35 pmLondon Heathrow
$1,077
Find similar
Avianca
Apr 10
LHR10:05 pmLondon Heathrow
35h 35m
1 stop
AEP5:40 amBuenos Aires Jorge Newbery
Apr 15
AEP7:00 amBuenos Aires Jorge Newbery
28h 35m
1 stop
LHR3:35 pmLondon Heathrow
$1,087
Find similar
Avianca
Nov 21
LHR9:40 pmLondon Heathrow
21h 10m
1 stop
EZE3:50 pmBuenos Aires Ministro Pistarini
Dec 5
EZE7:30 amBuenos Aires Ministro Pistarini
28h 05m
1 stop
LHR2:35 pmLondon Heathrow
$1,094
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London 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 November 6, 2025.
Use the filters below to find and compare flights from London to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 3/10

11:30 am-10:25 pm

2 stops37h 55m

Buenos Aires Ministro Pistarini

Sun 3/29

11:55 pm-3:20 pm

2 stops35h 25m

$1,073

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 3/4

11:30 am-10:25 pm

2 stops37h 55m

Buenos Aires Ministro Pistarini

Thu 6/4

11:55 pm-3:20 pm

2 stops35h 25m

$1,074

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 2/26

9:40 pm-3:50 pm

1 stop21h 10m

Buenos Aires Ministro Pistarini

Wed 3/18

1:40 am-2:35 pm

1 stop33h 55m

$1,077

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Fri 4/10

10:05 pm-5:40 am

1 stop35h 35m

Buenos Aires Jorge Newbery

Wed 4/15

7:00 am-3:35 pm

1 stop28h 35m

$1,087

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 2/3

9:40 pm-3:50 pm

1 stop21h 10m

Buenos Aires Ministro Pistarini

Wed 2/11

7:30 am-8:25 am

2 stops21h 55m

$1,087

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 1/13

4:30 pm-7:55 am

1 stop18h 25m

Buenos Aires Ministro Pistarini

Wed 2/4

2:40 pm-1:00 pm

2 stops19h 20m

$1,090

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Tue 3/3

7:40 pm-5:55 pm

1 stop25h 15m

Buenos Aires Ministro Pistarini

Tue 6/2

9:40 pm-8:00 pm

1 stop18h 20m

$1,105

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 3/3

5:25 pm-5:55 pm

1 stop27h 30m

Buenos Aires Ministro Pistarini

Tue 6/2

9:40 pm-6:15 pm

1 stop16h 35m

$1,109

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Sun 3/15

10:00 am-8:50 am

1 stop25h 50m

Buenos Aires Ministro Pistarini

Sun 3/29

12:10 pm-9:00 am

1 stop16h 50m

$1,141

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Mon 3/9

10:00 am-8:50 am

1 stop25h 50m

Buenos Aires Ministro Pistarini

Sat 3/28

12:25 pm-3:25 pm

1 stop24h 00m

$1,212

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 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 cheapest month to fly to Buenos Aires?

The cheapest month to fly to Buenos Aires from London is in September. Flight prices, which tend to average around $1,132, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Buenos Aires from London during March instead. Flights to Buenos Aires in March, while not as cheap as those in September, still average around $1,161.

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 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 to Buenos Aires flight route?

Fly from London Heathrow to Buenos Aires Ministro Pistarini for the best London - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,369 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 for as low as $1,162 on momondo.

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

There is only 1 cabin class available to choose from on London 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 to Buenos Aires flight prices changed over time?

As of November 2025, prices for London to Buenos Aires flights are approximately 7% cheaper when compared to flights at the same time last year.

When to book flights from London to Buenos Aires

Are you open to changing your travel dates? Check out the ideal times to fly from London to Buenos Aires according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London to Buenos Aires (LON to BUE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Buenos Aires

Direct flights

None
There are no direct flights from London to Buenos Aires. There are no popular flight routes from London to Buenos Aires.
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  • How far is London to Buenos Aires by plane?

    Buenos Aires is 6909.8 mi away from London. A reasonable flight in good conditions will take 15h 25m.

  • When did momondo last update prices for flights from London to Buenos Aires?

    Prices for flights from London to Buenos Aires refresh daily.

  • How many operators does momondo search for flights from London to Buenos Aires?

  • How old do you have to be to fly from London to Buenos Aires?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Buenos Aires.

  • What documentation or ID do you need to fly to Buenos Aires?

    The travel and health documents required for your trip to Buenos Aires can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Buenos Aires. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from London to Buenos Aires?

  • What is the most popular airline from London to Buenos Aires?

Best airlines flying from London to Buenos Aires

Compare and see reviews for airlines that fly from London to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
IberiaPriceFrom $1,021Free CancellationRating
7.0
3,007 reviews
Search Iberia flights

  • Iberia Flights From London to Buenos Aires

    Across 7 Iberia flights from London to Buenos Aires this week, the average price was $1,191, with the best Iberia deals starting from $1,021 round-trip. 3,007 users have rated Iberia on momondo, with an average score of 7.0/10.

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?

All flight searches from London to Buenos Aires on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to Buenos Aires?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Buenos Aires.

I’m not ready to book a flight from London to Buenos Aires right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Buenos Aires, momondo offers a useful price alert feature which will track prices for flights to Buenos Aires from London and alert you when they change.

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.
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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