AirHint found the following cheapest return flights from London (LGW) to Tromso (TOS) in December 2025 (see full year).

Return flights

31 Dec - 21 Jan	Norwegian	direct
31 Dec - 12 Jan	Norwegian	direct
31 Dec - 19 Jan	Norwegian	direct
31 Dec - 16 Jan	Norwegian	direct
31 Dec - 14 Jan	Norwegian	direct
31 Dec - 18 Jan	Norwegian	direct
31 Dec - 07 Jan	Norwegian
31 Dec - 11 Jan	Norwegian	direct
31 Dec - 20 Jan	Norwegian
30 Dec - 12 Jan	Norwegian
29 Dec - 31 Dec	Ryanair
27 Dec - 31 Dec	Ryanair
29 Dec - 30 Dec	Ryanair
28 Dec - 31 Dec	Wizz Air UK
29 Dec - 29 Dec	Ryanair
28 Dec - 30 Dec	Norwegian Air Sweden AOC
27 Dec - 28 Dec	easyJet
27 Dec - 30 Dec	Ryanair
27 Dec - 29 Dec	easyJet

Also check the deals for one-way flights from London to Tromso 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 Tromso in December from 278€

Return flights