Cheapest return flights from London to Shannon in September from $42

Best time to book flights for London (LON) to Shannon (SNN) flights at AirHint

AirHint found the following cheapest return flights from London (LON) to Shannon (SNN) in September 2025 (see full year).

Return flights

18 Sep - 23 Sep Ryanair direct
18 Sep - 01 Oct Ryanair direct
09 Sep - 23 Sep Ryanair direct
15 Sep - 23 Sep Ryanair direct
14 Sep - 23 Sep Ryanair direct
19 Sep - 23 Sep Ryanair direct
11 Sep - 23 Sep Ryanair direct
10 Sep - 23 Sep Ryanair direct
17 Sep - 23 Sep Ryanair direct
20 Sep - 23 Sep Ryanair direct
01 Sep - 03 Sep Ryanair direct
29 Sep - 01 Oct Ryanair direct
26 Sep - 01 Oct Ryanair direct
25 Sep - 01 Oct Ryanair direct
15 Sep - 01 Oct Ryanair direct
14 Sep - 01 Oct Ryanair direct
30 Sep - 01 Oct Ryanair direct
23 Sep - 01 Oct Ryanair direct
19 Sep - 01 Oct Ryanair direct
11 Sep - 01 Oct Ryanair direct

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

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