Cheapest return flights from London to Shannon in December from $182

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

Return flights

06 Dec - 07 Dec Aer Lingus direct
04 Dec - 07 Dec Aer Lingus direct
17 Dec - 07 Jan Aer Lingus direct
12 Dec - 14 Dec Aer Lingus direct
16 Dec - 23 Dec Aer Lingus direct
30 Dec - 01 Jan Aer Lingus direct
30 Dec - 02 Jan Aer Lingus direct
18 Dec - 30 Dec British Airways
19 Dec - 26 Dec British Airways
12 Dec - 04 Jan Aer Lingus direct
20 Dec - 30 Dec Aer Lingus direct
18 Dec - 30 Dec Aer Lingus direct
23 Dec - 28 Dec Aer Lingus direct
24 Dec - 29 Dec Aer Lingus direct
20 Dec - 03 Jan Aer Lingus direct

Also check the deals for one-way flights from London to Shannon 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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