Ryanair have a bit of a FLASH SALE at the moment on their flights to Berlin.
Best value is in September and October but you can get return flights for as little as £19.99 per person.
For example:
Sunday 18th Sept – Tuesday 20th September
Belfast to Berlin
0705 – 1025
Berlin to Belfast
1050 – 1210
Flight cost – £19.99
(via Ryanair)
*prices correct at time of posting