AirHint found the following cheapest return flights from Belfast (BHD) to London (LTN) in September 2025 (see full year).

Return flights

03 Sep - 10 Sep	easyJet	direct
03 Sep - 08 Sep	easyJet	direct
17 Sep - 24 Sep	easyJet	direct
15 Sep - 17 Sep	easyJet	direct
22 Sep - 26 Sep	easyJet	direct
10 Sep - 14 Sep	easyJet	direct
17 Sep - 19 Sep	easyJet	direct
09 Sep - 17 Sep	easyJet
03 Sep - 04 Sep	easyJet	direct
02 Sep - 03 Sep	easyJet	direct
30 Sep - 14 Oct	easyJet
24 Sep - 01 Oct	easyJet
04 Sep - 16 Oct	easyJet

Also check the deals for one-way flights from Belfast to London 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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Belfast to London in September from $60

Return flights