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

One-Way flights

04 Dec	Scandinavian Airlines
11 Dec	Scandinavian Airlines
05 Dec	Scandinavian Airlines
03 Dec	Scandinavian Airlines
15 Dec	Scandinavian Airlines
12 Dec	Scandinavian Airlines
07 Dec	Aer Lingus
26 Dec	Scandinavian Airlines
18 Dec	Scandinavian Airlines
17 Dec	Scandinavian Airlines

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

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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Cheapest one-way flights from London to Kaunas in December from 104€

One-Way flights