Cheapest return flights from London to Belfast in September from $39

Best time to book flights for London (STN) to Belfast (BFS) flights at AirHint

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

Return flights

11 Sep - 23 Sep Ryanair direct
08 Sep - 23 Sep Ryanair direct
08 Sep - 10 Sep Ryanair direct
11 Sep - 17 Sep Ryanair direct
22 Sep - 23 Sep Ryanair direct
29 Sep - 07 Oct Ryanair direct
24 Sep - 07 Oct Ryanair direct
22 Sep - 07 Oct Ryanair direct
29 Sep - 13 Oct Ryanair direct
24 Sep - 13 Oct Ryanair direct
08 Sep - 17 Sep Ryanair direct
11 Sep - 12 Sep Ryanair direct
08 Sep - 09 Sep Ryanair direct
08 Sep - 12 Sep Ryanair direct
20 Sep - 07 Oct Ryanair direct
28 Sep - 07 Oct Ryanair direct
22 Sep - 13 Oct Ryanair direct
20 Sep - 23 Sep Ryanair direct
29 Sep - 19 Oct Ryanair direct
28 Sep - 13 Oct Ryanair direct

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

Skyscanner

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 Belfast

Cheap car rent in Belfast