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

Return flights

22 Sep - 30 Sep	Transavia France
13 Sep - 18 Sep	Icelandair
13 Sep - 22 Sep	Finnair
09 Sep - 23 Oct	TAP
13 Sep - 23 Sep	Finnair
02 Sep - 16 Sep	TAP
25 Sep - 02 Oct	Icelandair
04 Sep - 04 Oct	Icelandair
02 Sep - 07 Sep	British Airways
15 Sep - 18 Sep	Icelandair
17 Sep - 24 Sep	Icelandair
03 Sep - 17 Sep	Delta
10 Sep - 14 Sep	Icelandair
26 Sep - 03 Oct	KLM
20 Sep - 20 Oct	British Airways
26 Sep - 03 Oct	Scandinavian Airlines	direct

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 353€

Return flights