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Cheap flights from London to Buenos Aires from €635

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 27/12. 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 return flights

Avianca Logo
22:05 - 00:10LHR-EZE
30h 05m1 stop
Avianca Logo
07:35 - 14:35EZE-LHR
28h 00m1 stop
€836Avianca
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Thu, 9 Oct - Sun, 26 Oct
Avianca Logo
22:05 - 00:10LHR-EZE
30h 05m1 stop
Avianca Logo
16:55 - 14:35EZE-LHR
18h 40m1 stop
€868Avianca
Find Deal
Thu, 9 Oct - Fri, 7 Nov
United Airlines Logo
16:40 - 06:20LHR-EZE
41h 40m2 stops
United Airlines Logo
22:05 - 05:55EZE-LHR
28h 50m2 stops
€905United Airlines
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Sat, 25 Oct - Wed, 12 Nov
United Airlines Logo
12:05 - 08:20LHR-EZE
23h 15m1 stop
United Airlines Logo
22:05 - 07:30EZE-LHR
30h 25m1 stop
€906United Airlines
Find Deal
Sun, 26 Oct - Sun, 9 Nov
Logo
17:30 - 07:55LHR-EZE
17h 25m1 stop
Logo
14:40 - 13:00EZE-LHR
19h 20m2 stops
€932
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Thu, 12 Mar - Wed, 25 Mar
Logo
17:30 - 07:55LHR-EZE
17h 25m1 stop
Logo
14:40 - 13:00EZE-LHR
19h 20m2 stops
€933
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Thu, 12 Mar - Wed, 25 Mar
Lufthansa Logo
09:30 - 07:55LHR-EZE
25h 25m1 stop
Lufthansa Logo
17:45 - 22:20EZE-LHR
25h 35m1 stop
€942Lufthansa
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Thu, 12 Mar - Thu, 26 Mar
Lufthansa Logo
15:30 - 07:55LHR-EZE
19h 25m1 stop
Lufthansa Logo
17:45 - 15:50EZE-LHR
19h 05m1 stop
€947Lufthansa
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Thu, 12 Mar - Thu, 26 Mar
Air Europa Logo
10:00 - 08:50LGW-EZE
25h 50m1 stop
Air Europa Logo
12:15 - 09:00EZE-LGW
16h 45m1 stop
€1,014Air Europa
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Fri, 13 Mar - Mon, 6 Apr
Air Europa Logo
17:25 - 08:50LGW-EZE
18h 25m1 stop
Air Europa Logo
12:15 - 16:25EZE-LGW
24h 10m1 stop
€1,015Air Europa
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Fri, 13 Mar - Sun, 29 Mar

Avianca flights from London to Buenos Aires

Our best Avianca deals on London to Buenos Aires flight tickets
Avianca
9 Oct
LHR22:05London Heathrow
30h 05m
1 stop
EZE00:10Buenos Aires Ministro Pistarini
26 Oct
EZE07:35Buenos Aires Ministro Pistarini
28h 00m
1 stop
LHR14:35London Heathrow
€836
Find similar
Avianca
9 Oct
LHR22:05London Heathrow
30h 05m
1 stop
EZE00:10Buenos Aires Ministro Pistarini
3 Nov
EZE16:55Buenos Aires Ministro Pistarini
18h 40m
1 stop
LHR14:35London Heathrow
€868
Find similar
Avianca
20 Jan
LHR21:40London Heathrow
21h 10m
1 stop
EZE15:50Buenos Aires Ministro Pistarini
3 Feb
EZE16:55Buenos Aires Ministro Pistarini
18h 40m
1 stop
LHR14:35London Heathrow
€872
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United Airlines flights from London to Buenos Aires

Our best United Airlines deals on London to Buenos Aires flight tickets
United Airlines
25 Oct
LHR16:40London Heathrow
41h 40m
2 stops
EZE06:20Buenos Aires Ministro Pistarini
12 Nov
EZE23:55Buenos Aires Ministro Pistarini
28h 35m
1 stop
LHR07:30London Heathrow
€905
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United Airlines
26 Oct
LHR12:05London Heathrow
23h 15m
1 stop
EZE08:20Buenos Aires Ministro Pistarini
8 Nov
EZE23:55Buenos Aires Ministro Pistarini
28h 35m
1 stop
LHR07:30London Heathrow
€906
Find similar
United Airlines
12 Mar
LHR12:05London Heathrow
23h 15m
1 stop
EZE08:20Buenos Aires Ministro Pistarini
26 Mar
EZE22:55Buenos Aires Ministro Pistarini
29h 35m
1 stop
LHR07:30London Heathrow
€908
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momondo Fare Finder

 
Customise 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 13,528 searches. Data last updated 15 September 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

Thu 9/10

22:05-00:10

1 stop30h 05m

Buenos Aires Ministro Pistarini

Sun 26/10

07:35-14:35

1 stop28h 00m

€836

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 9/10

22:05-00:10

1 stop30h 05m

Buenos Aires Ministro Pistarini

Fri 7/11

16:55-14:35

1 stop18h 40m

€868

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 25/10

16:40-06:20

2 stops41h 40m

Buenos Aires Ministro Pistarini

Wed 12/11

22:05-05:55

2 stops28h 50m

€905

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 26/10

12:05-08:20

1 stop23h 15m

Buenos Aires Ministro Pistarini

Sun 9/11

22:05-07:30

1 stop30h 25m

€906

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 12/3

17:30-07:55

1 stop17h 25m

Buenos Aires Ministro Pistarini

Wed 25/3

14:40-13:00

2 stops19h 20m

€932

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 12/3

17:30-07:55

1 stop17h 25m

Buenos Aires Ministro Pistarini

Wed 25/3

14:40-13:00

2 stops19h 20m

€933

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 12/3

09:30-07:55

1 stop25h 25m

Buenos Aires Ministro Pistarini

Thu 26/3

17:45-22:20

1 stop25h 35m

€942

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 12/3

15:30-07:55

1 stop19h 25m

Buenos Aires Ministro Pistarini

Thu 26/3

17:45-15:50

1 stop19h 05m

€947

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Fri 13/3

10:00-08:50

1 stop25h 50m

Buenos Aires Ministro Pistarini

Mon 6/4

12:15-09:00

1 stop16h 45m

€1,014

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Fri 13/3

17:25-08:50

1 stop18h 25m

Buenos Aires Ministro Pistarini

Sun 29/3

12:15-16:25

1 stop24h 10m

€1,015

Flights are sorted by cheapest return 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 typical price of a round-trip flight between London and Buenos Aires?

What is the cheapest month to fly to Buenos Aires?

In general, March is the cheapest month to fly from London to Buenos Aires. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around €968. If you aren’t able to travel to Buenos Aires during the month of March, then flying in May is also cheap. Prices for this month can be found on momondo for an average of €988.

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

According to our data, Monday is the cheapest day to fly to Buenos Aires from London. The lowest ticket price found for a Monday departure recently was €764. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Buenos Aires is Thursday, with ticket prices averaging around €1,739.

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

Our data shows that the cheapest London to Buenos Aires flights are usually those with departure times in the afternoon. Our users have found flights to Buenos Aires in the afternoon for as low as €756. In contrast, the most expensive time of day to depart to Buenos Aires is in the evening when prices are around €1,050.

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 €1,154 when searching weeks before you fly. 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 €993 on momondo.

How have London to Buenos Aires flight prices changed over time?

As of September 2025, prices for London to Buenos Aires flights are approximately 4% more expensive 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 return 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?

    London and Buenos Aires are 11120.2 km apart from one another. By plane, this route typically takes 16h 25m.

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

    Prices for flights from London to Buenos Aires were last updated today.

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Buenos Aires.

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

    The necessary travel and health documents for your Buenos Aires trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's licence and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

  • What is the most popular airline from London 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?

momondo provides multiple filters to help you find the best flight to Buenos Aires from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Buenos Aires from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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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 27.4 km from Buenos Aires
Buenos Aires Jorge Newbery Airport
Buenos Aires Ministro Pistarini Airport