AirHint found the following cheapest return flights from London (LCY) to Frankfurt (FRA) in December 2026 (see full year).

Return flights

14 Dec - 08 Jan	Lufthansa	direct
04 Dec - 07 Dec	Lufthansa	direct
28 Dec - 07 Jan	Lufthansa	direct
10 Dec - 29 Dec	Lufthansa	direct
07 Dec - 09 Dec	Lufthansa	direct
05 Dec - 07 Dec	KLM
03 Dec - 06 Dec	KLM
04 Dec - 06 Dec	KLM
09 Dec - 12 Dec	KLM
21 Dec - 04 Jan	Lufthansa	direct
19 Dec - 23 Dec	KLM
20 Dec - 27 Dec	KLM
19 Dec - 20 Dec	KLM

Also check the deals for one-way flights from London to Frankfurt 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 return flights from London to Frankfurt in December from $216

Return flights