Cheapest return flights from London to Dublin in September from $176

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

21 Sep - 25 Sep British Airways direct
28 Sep - 09 Oct British Airways direct
23 Sep - 28 Sep British Airways direct
09 Sep - 15 Sep British Airways direct
16 Sep - 22 Sep British Airways direct
19 Sep - 21 Sep British Airways direct
17 Sep - 22 Sep British Airways direct
17 Sep - 19 Sep British Airways direct
05 Sep - 09 Sep British Airways direct
05 Sep - 08 Sep British Airways direct
05 Sep - 15 Sep 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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