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

Return flights

24 Sep - 28 Sep	Delta
16 Sep - 26 Sep	KLM
16 Sep - 21 Sep	Delta
17 Sep - 02 Oct	KLM
25 Sep - 28 Sep	Delta
30 Sep - 21 Oct	Delta
30 Sep - 07 Oct	Lufthansa
21 Sep - 25 Sep	SWISS
29 Sep - 06 Oct	Finnair
30 Sep - 05 Oct	Lufthansa
20 Sep - 01 Oct	SWISS
21 Sep - 28 Sep	Lufthansa
20 Sep - 27 Sep	SWISS
29 Sep - 05 Oct	Lufthansa
19 Sep - 26 Sep	Lufthansa
13 Sep - 18 Sep	Delta
15 Sep - 22 Sep	Lufthansa
30 Sep - 04 Oct	Wizz Air
30 Sep - 03 Oct	Lufthansa
26 Sep - 02 Oct	KLM

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 $457

Return flights