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

Return flights

20 Oct - 22 Oct	easyJet
10 Oct - 19 Oct	easyJet
10 Oct - 09 Nov	easyJet
10 Oct - 12 Oct	easyJet
17 Oct - 22 Oct	easyJet
10 Oct - 14 Oct	easyJet
08 Oct - 14 Oct	easyJet
10 Oct - 13 Oct	easyJet
03 Oct - 05 Oct	easyJet
15 Oct - 19 Oct	easyJet
03 Oct - 12 Oct	easyJet
27 Oct - 01 Nov	easyJet
24 Oct - 01 Nov	easyJet

Also check the deals for one-way flights from Southend 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 Southend to Sofia in October from $229

Return flights