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 - 19 Jan	Norwegian	direct
31 Dec - 12 Jan	Norwegian	direct
31 Dec - 16 Jan	Norwegian	direct
31 Dec - 14 Jan	Norwegian	direct
10 Dec - 12 Dec	easyJet
31 Dec - 11 Jan	Norwegian	direct
13 Dec - 15 Dec	Ryanair
10 Dec - 15 Dec	Ryanair
15 Dec - 19 Dec	easyJet	direct
31 Dec - 18 Jan	Norwegian	direct
13 Dec - 17 Dec	Ryanair
13 Dec - 19 Dec	Ryanair
10 Dec - 17 Dec	Ryanair
31 Dec - 07 Jan	Norwegian
29 Dec - 23 Jan	easyJet	direct
12 Dec - 15 Dec	Norwegian
15 Dec - 17 Dec	easyJet	direct
15 Dec - 26 Dec	easyJet	direct
31 Dec - 15 Jan	Norwegian

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 $208

Return flights