I have a few, though apart from the first, the others kinda are more "anything with fairies" ;-)

Tír na nÓg (http://bellatemple.livejournal.com/613973.html): When Ben gets abducted by fairies, Dean heads out to get himself taken as well, hoping that he can locate Ben and bring him back. He quickly discovers he's in way over his head as the sidhe throw him in the dungeons. Meanwhile, back in the human world, Bobby has his hands full trying to keep the fairies from destroying the town, and a soulless Sam from blocking Dean and the Braedens' route home.

It's a very good story about the journey through Underhill, the battles fought and the interesting characters Dean met. It's damn well-written and fun and sad all at once. It's gen, though of course there is mention of Dean/Lisa (maybe even kissing, not so sure anymore)

Also, a bit older:
The Queen of Light took her Bow (http://www.fanfiction.net/s/4875088/1/The_Queen_of_Light_Took_Her_Bow): Battle lines are drawn when the touch of the Fae is felt in the town where the Winchesters have found refuge. The repercussions could change the family’s path forever. Sam 18 Dean 22.
It's gen.

And if you don't mind a little J2, I will absolutely rec you One feeling at a time (http://kelleigh.livejournal.com/310725.html), which has Jensen as a fairy and is based on Peter Pan. It's just heartbreaking and happy-making, so you should definitely read it, even though it doesn't fit your parameters too well.

For J2-stories, you can also check the "fairy"-tag on J2-recs here (http://j2-recs.livejournal.com/tag/fairies)