Hello, Why not ride the bike there. I travel to Ireland and back to Estonia most years. I am Irish living in Tartu. You can get a ferry from Latvia to Germany drive to Calais in France and then a ferry to Dover in UK and then across the UK to Pembroke in Wales then another ferry to Roslare in Ireland. The journey takes usually 3 days. I can give you details if interested, It is a very nice trip. Eric.