Cheapest one-way flights from London to Buenos Aires in December from $641

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

One-Way flights

02 Dec British Airways
01 Dec British Airways
05 Dec TAP
03 Dec TAP
25 Dec Vueling Airlines
24 Dec Vueling Airlines
28 Dec Vueling Airlines
29 Dec Vueling Airlines
31 Dec Vueling Airlines
07 Dec Vueling Airlines

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.

Book a cheap hotel in Buenos Aires

Cheap car rent in Buenos Aires

Feel free to contact us with any feedback or request another flight research.