Capital146 From United Kingdom, joined Jun 2003, 2125 posts, RR: 49 Reply 2, posted (9 years 2 months 4 weeks 12 hours ago) and read 663 times:
Ryanair are the only LCC operating from London airports to DUB. They offer a very comprehensive service from LGW, STN and LTN and if you are able to book a month or two in advance, fly on a mid-week flight, away from peak hours, you will almost certainly pick up an excellent fare. Their website is http://www.ryanair.com
bmi from LHR can be very reasonable to DUB and will offer full service rather than no frills. Have a look at their fares at http://www.flybmi.com
Also, many people have also said that fares with Aer Lingus can be reasonable, they fly to DUB from LHR. http://www.aerlingus.com
Other alternatives are BA Citiexpress from LGW and CityJet from LCY.