AirHint found the following cheapest return flights from London (LGW) to Shannon (SNN) in September 2026 (see full year).

Return flights

15 Sep - 24 Sep	Ryanair	direct
15 Sep - 01 Oct	Ryanair	direct
09 Sep - 24 Sep	Ryanair	direct
05 Sep - 24 Sep	Ryanair	direct
14 Sep - 24 Sep	Ryanair	direct
12 Sep - 24 Sep	Ryanair	direct
11 Sep - 24 Sep	Ryanair	direct
24 Sep - 01 Oct	Ryanair	direct
09 Sep - 13 Sep	Ryanair	direct
14 Sep - 01 Oct	Ryanair	direct
12 Sep - 01 Oct	Ryanair	direct
02 Sep - 13 Sep	Ryanair	direct
11 Sep - 01 Oct	Ryanair	direct
24 Sep - 12 Oct	Ryanair	direct
15 Sep - 18 Sep	Ryanair	direct
02 Sep - 04 Sep	Ryanair	direct
24 Sep - 11 Oct	Ryanair	direct

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

Cheap car rent in Shannon

Cheapest return flights from London to Shannon in September from $89

Return flights