Just looking through the website and found out what just the bread is (so you can build something with a few less syns lol):
TBH they are all quite high in syns...
Subway 6" White - 9 Syns
Subway 6" Wheat - 10 Syns
Subway 6" Italian Herbs & Cheese - 11 Syns
Subway 6" Inch Honey & Oat - 10 Syns
Subway 6" Hearty Italian White - 9 Syns
Subway 6" Deli Style - 9.5 Syns