AirHint found the following cheapest return flights from Boston (BOS) to Edinburgh (EDI) in December 2025 (see full year).

Return flights

02 Dec - 09 Dec	Air Canada
05 Dec - 08 Dec	Air Canada
04 Dec - 07 Dec	Air Canada
12 Dec - 15 Dec	Aer Lingus
05 Dec - 14 Dec	Aer Lingus
28 Dec - 17 Jan	Aer Lingus
07 Dec - 27 Dec	Aer Lingus
06 Dec - 27 Dec	Aer Lingus
27 Dec - 31 Dec	Aer Lingus
18 Dec - 10 Jan	Aer Lingus
28 Dec - 01 Jan	Scandinavian Airlines
11 Dec - 03 Jan	Icelandair
29 Dec - 03 Jan	Icelandair
24 Dec - 30 Dec	Lufthansa
05 Dec - 03 Jan	Aer Lingus
20 Dec - 03 Jan	Icelandair
23 Dec - 03 Jan	Aer Lingus

Also check the deals for one-way flights from Boston to Edinburgh 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 Boston to Edinburgh in December from $420

Return flights