Cheapest return flights from London to Dublin in September from $133

Best time to book flights for London (LCY) to Dublin (DUB) flights at AirHint

AirHint found the following cheapest return flights from London (LCY) to Dublin (DUB) in September 2025 (see full year).

Return flights

09 Sep - 11 Sep British Airways direct
18 Sep - 22 Sep British Airways direct
16 Sep - 29 Sep British Airways direct
05 Sep - 08 Sep British Airways direct
15 Sep - 18 Sep British Airways direct
10 Sep - 10 Sep British Airways direct
16 Sep - 19 Sep British Airways direct
12 Sep - 15 Sep British Airways direct
10 Sep - 17 Sep British Airways direct
01 Sep - 09 Sep British Airways direct
03 Sep - 16 Oct British Airways direct
26 Sep - 07 Oct British Airways direct
24 Sep - 03 Oct British Airways direct
15 Sep - 06 Oct British Airways direct
24 Sep - 01 Oct British Airways direct

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