Cheapest one-way flights from London to Buenos Aires in December from $637

AirHint found the following cheapest one-way flights from London (LHR) to Buenos Aires (AEP) in December 2025 (see full year).

One-Way flights

03 Dec British Airways
09 Dec British Airways
15 Dec British Airways
08 Dec British Airways
02 Dec Vueling Airlines
05 Dec British Airways
25 Dec British Airways
16 Dec British Airways
24 Dec British Airways
31 Dec British Airways

Also check the deals for return flights from London to Buenos Aires in December.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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