Return flight to Munich around £100pp: easyJet
Return bus to Ljubljana is only £40 via flixbus: https://shop.flixbus.co.uk/search?rideDate=07.10.2017&backRide=1&backRideDate=09.10.2017&adults=1&children=0&bikes=0&route=Munich-Ljubljana&departureCity=94&departureStation=&arrivalCity=1925&arrivalStation=