Cheapest return flights from London to Dublin in September from $101

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

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

Return flights

10 Sep - 16 Sep British Airways direct
10 Sep - 17 Sep British Airways direct
30 Sep - 06 Oct British Airways direct
03 Sep - 18 Sep British Airways direct
03 Sep - 13 Sep British Airways direct
02 Sep - 09 Sep British Airways direct
04 Sep - 08 Sep British Airways direct
13 Sep - 17 Sep British Airways direct
23 Sep - 09 Oct British Airways direct
24 Sep - 28 Sep British Airways direct
25 Sep - 26 Sep British Airways direct
25 Sep - 25 Sep British Airways direct
28 Sep - 01 Oct British Airways direct
25 Sep - 01 Oct British Airways direct
23 Sep - 02 Oct British Airways direct
01 Sep - 03 Oct British Airways direct
26 Sep - 05 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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