AirHint found the following cheapest return flights from Cologne (CGN) to Newark (EWR) in September 2025 (see full year).

Return flights

23 Sep - 30 Sep	Lufthansa
23 Sep - 28 Sep	Lufthansa
23 Sep - 29 Sep	Lufthansa
30 Sep - 08 Oct	Lufthansa
26 Sep - 10 Oct	Ryanair
28 Sep - 04 Oct	Lufthansa
26 Sep - 04 Oct	Lufthansa
22 Sep - 24 Sep	Ryanair
22 Sep - 26 Sep	Lufthansa
24 Sep - 01 Oct	Ryanair
26 Sep - 28 Sep	British Airways
29 Sep - 16 Oct	Lufthansa
23 Sep - 26 Sep	Ryanair
26 Sep - 01 Oct	Eurowings
20 Sep - 11 Oct	Eurowings
21 Sep - 23 Sep	Lufthansa
25 Sep - 01 Oct	Lufthansa
20 Sep - 01 Oct	Eurowings

Also check the deals for one-way flights from Cologne to Newark 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 Cologne to Newark in September from $670

Return flights