AirHint found the following cheapest return flights from Newark (EWR) to Sofia (SOF) in October 2025 (see full year).

Return flights

19 Oct - 04 Nov	Lufthansa
21 Oct - 12 Nov	Lufthansa
21 Oct - 04 Nov	Air France
28 Oct - 11 Nov	Lufthansa
19 Oct - 11 Nov	Air France
19 Oct - 12 Nov	Air France
19 Oct - 05 Nov	Air France
21 Oct - 05 Nov	Air France
29 Oct - 12 Nov	Air France
22 Oct - 29 Oct	Lufthansa
22 Oct - 07 Nov	Air France
21 Oct - 28 Oct	Air France
14 Oct - 28 Oct	Air France
19 Oct - 28 Oct	Air France
19 Oct - 29 Oct	Air France
14 Oct - 21 Oct	Air France
05 Oct - 15 Oct	SWISS
10 Oct - 15 Oct	Austrian Airlines
09 Oct - 23 Oct	Austrian Airlines
20 Oct - 27 Oct	SWISS

Also check the deals for one-way flights from Newark to Sofia in October.

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 Newark to Sofia in October from 297€

Return flights