AirHint found the following cheapest return flights from London (LGW) to Tromso (TOS) in August 2026 (see full year).

Return flights

29 Aug - 04 Sep	Norwegian
10 Aug - 04 Sep	Norwegian
29 Aug - 06 Sep	Air France
13 Aug - 17 Aug	Norwegian
03 Aug - 11 Aug	Norwegian
08 Aug - 16 Aug	Norwegian
07 Aug - 09 Aug	Norwegian
10 Aug - 11 Aug	Norwegian
10 Aug - 13 Aug	Norwegian
06 Aug - 11 Aug	Norwegian
06 Aug - 09 Aug	Norwegian
07 Aug - 11 Aug	Norwegian
03 Aug - 09 Aug	Norwegian

Also check the deals for one-way flights from London to Tromso in August.

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 August from 227€

Return flights