AirHint found the following cheapest return flights from Newcastle (NCL) to Belfast (BFS) in September 2025 (see full year).

Return flights

21 Sep - 23 Sep	easyJet	direct
13 Sep - 14 Sep	easyJet	direct
06 Sep - 07 Sep	easyJet	direct
12 Sep - 14 Sep	easyJet	direct
04 Sep - 09 Sep	easyJet	direct
10 Sep - 14 Sep	easyJet	direct
01 Sep - 03 Sep	easyJet	direct
03 Sep - 09 Sep	easyJet	direct
10 Sep - 11 Sep	easyJet	direct
06 Sep - 08 Sep	easyJet	direct

Also check the deals for one-way flights from Newcastle to Belfast 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 Newcastle to Belfast in September from $45

Return flights