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

Return flights

07 May - 11 May	Norwegian
08 May - 11 May	Norwegian
07 May - 09 May	Norwegian
07 May - 17 May	Norwegian
01 May - 11 May	Norwegian
01 May - 09 May	Norwegian
01 May - 17 May	Norwegian
21 May - 10 Jun	Norwegian
08 May - 09 May	Norwegian
08 May - 17 May	Norwegian
21 May - 11 Jun	Norwegian
15 May - 19 May	Norwegian
22 May - 10 Jun	Norwegian
22 May - 11 Jun	Norwegian
23 May - 01 Jun	Norwegian

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

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 May from $265

Return flights