Honestly I would not expect any filters to help compared to not using one, since they add a flat reflection surface.
However, some filters add more flare than others. A filter that is multi-coated or - even better- super multi-coated adds less reflections and therefore less flare.
To reduce flare if the sun is not shining directly into your lens, try a lens hood first. If it does not enough, then you need additional shading. Anything that does not obstruct the subject will do (hand, hat, a friend, etc).
Keep in mind that if you use a full-frame lens on a cropped-sensor camera, the hood supplied with your lens cannot be adequate. This is also the case for a zoom lens at any focal other than its widest point.