AirHint found the following cheapest return flights from Sandefjord (TRF) to Riga (RIX) in September 2025 (see full year).

Return flights

19 Sep - 26 Sep	Ryanair	direct
15 Sep - 18 Sep	Ryanair	direct
06 Sep - 10 Sep	Ryanair	direct
17 Sep - 18 Sep	Ryanair	direct
10 Sep - 26 Sep	Ryanair	direct
24 Sep - 26 Sep	Ryanair	direct
15 Sep - 17 Sep	Ryanair	direct
08 Sep - 13 Sep	Ryanair	direct
06 Sep - 12 Sep	Ryanair	direct
06 Sep - 13 Sep	Ryanair	direct
29 Sep - 02 Oct	Ryanair	direct
29 Sep - 03 Oct	Ryanair	direct
27 Sep - 01 Oct	Ryanair	direct

Also check the deals for one-way flights from Sandefjord to Riga in September.

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 Sandefjord to Riga in September from $36

Return flights