AirHint found the following cheapest return flights from London (LHR) to Iasi (IAS) in December 2025 (see full year).

Return flights

25 Dec - 23 Jan	Austrian Airlines
04 Dec - 10 Dec	Lufthansa
25 Dec - 31 Dec	Austrian Airlines
26 Dec - 31 Dec	Austrian Airlines
11 Dec - 14 Dec	Lufthansa
10 Dec - 09 Jan	Austrian Airlines
02 Dec - 05 Dec	Lufthansa
05 Dec - 08 Dec	Austrian Airlines
11 Dec - 07 Jan	Lufthansa
03 Dec - 15 Dec	Lufthansa
24 Dec - 26 Dec	Lufthansa
05 Dec - 07 Dec	Austrian Airlines
02 Dec - 06 Dec	KLM
26 Dec - 27 Jan	KLM
15 Dec - 12 Jan	Lufthansa
03 Dec - 15 Jan	KLM
30 Dec - 10 Jan	Brussels Airlines
15 Dec - 25 Jan	Lufthansa
15 Dec - 15 Jan	LOT
13 Dec - 01 Jan	Vueling Airlines

Also check the deals for one-way flights from London to Iasi 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 Iasi in December from 185€

Return flights