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

Return flights

06 Dec - 27 Dec	Ryanair
06 Dec - 29 Dec	Ryanair
04 Dec - 29 Jan	Ryanair
06 Dec - 28 Dec	Ryanair
06 Dec - 30 Dec	British Airways
29 Dec - 27 Jan	Ryanair
29 Dec - 28 Jan	British Airways
30 Dec - 28 Jan	British Airways
13 Dec - 31 Dec	Ryanair
31 Dec - 29 Jan	Ryanair
06 Dec - 31 Dec	Ryanair
23 Dec - 30 Dec	Ryanair
19 Dec - 16 Jan	Ryanair
06 Dec - 01 Jan	Ryanair
22 Dec - 06 Jan	Ryanair
23 Dec - 06 Jan	Ryanair

Also check the deals for one-way flights from Shannon to Bangkok 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 Shannon to Bangkok in December from $876

Return flights