Cheapest return flights from Boston to Oslo in September from $397

AirHint found the following cheapest return flights from Boston (BOS) to Oslo (OSL) in September 2025 (see full year).

Return flights

01 Sep - 07 Sep Icelandair
29 Sep - 06 Oct Scandinavian Airlines
05 Sep - 12 Sep Icelandair
02 Sep - 09 Sep Icelandair
14 Sep - 21 Sep Scandinavian Airlines
16 Sep - 22 Sep Delta
17 Sep - 24 Sep Icelandair
11 Sep - 18 Sep Scandinavian Airlines
20 Sep - 27 Sep Scandinavian Airlines
26 Sep - 03 Oct Scandinavian Airlines
27 Sep - 25 Oct Icelandair

Also check the deals for one-way flights from Boston to Oslo in September.

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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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