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

Return flights

24 Sep - 05 Oct	Ryanair
09 Sep - 16 Sep	Finnair
14 Sep - 28 Sep	Finnair
17 Sep - 29 Sep	Finnair
03 Sep - 09 Sep	Finnair
09 Sep - 14 Sep	Finnair
04 Sep - 11 Sep	Finnair
11 Sep - 15 Sep	Finnair
04 Sep - 08 Sep	Finnair
30 Sep - 15 Oct	British Airways
25 Sep - 05 Oct	British Airways
02 Sep - 09 Sep	Delta
04 Sep - 20 Sep	Delta
30 Sep - 07 Oct	KLM
25 Sep - 02 Oct	KLM
26 Sep - 03 Oct	KLM
28 Sep - 05 Oct	KLM
30 Sep - 09 Oct	SWISS
29 Sep - 06 Oct	KLM
27 Sep - 05 Oct	SWISS

Also check the deals for one-way flights from Oslo to New York 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 Oslo to New York in September from $447

Return flights