A

A Day Without Rain 2000 2:38
Afer Ventus 1991 4:05
Aldebaran 1987 3:05
An Ghaoth Ón Ghrian 1984 2:03
Angeles 1991 3:57
Aniron (Theme For Aragorn And Arwen) 2001 ~1:37
Anywhere Is 1995 3:58
Anywhere Is (Edit) 1995 3:43
As Baile 1991 4:03
Athair Ar Neamh 1995 3:39

A Day Without Rain

Albums 2000 A Day Without Rain
 
Collections 2002 Only Time - The Collection

Afer Ventus

The title is spelled correctly in the booklet notes, but misspelled as "After Ventus" in the track listings for Only Time - The Collection. 
 
Albums 1991 Shepherd Moons
 
Collections 1997 A Box Of Dreams
2002 Only Time - The Collection

Aldebaran

Albums 1987 Enya
1992 The Celts
 
Singles 1989 Storms In Africa
 
Collections 1997 A Box Of Dreams
2002 Only Time - The Collection

An Ghaoth Ón Ghrian (The Solar Wind)

Miscellaneous 1984 Touch Travel

Angeles

Albums 1991 Shepherd Moons
 
Singles 1991 Caribbean Blue
1992 Book Of Days
 
Collections 1997 A Box Of Dreams

Aniron (Theme For Aragorn And Arwen)

Enya wrote and performed this piece for the soundtrack of the film The Lord Of The Rings: The Fellowship Of The Ring.  It runs approximately 1:37 and is featured within the track The Council Of Elrond, which is 3:49 long.
 
Soundtracks 2001 The Lord of the Rings

Anywhere Is

The track has been released in its full album form running 3:58 and an edited version running 3:43. Check the individual listings below for the version used.
 
Albums 1995 The Memory Of Trees
1997 Paint The Sky With Stars
 
Singles 1995 Anywhere Is
 
Videos 2001 The Video Collection
 
Collections 1997 A Box Of Dreams
2002 Only Time - The Collection

As Baile

Singles 1991 Caribbean Blue
1992 Book Of Days
1994 Marble Halls
1994 The Christmas EP

Athair Ar Neamh

Albums 1995 The Memory Of Trees
 
Collections 1997 A Box Of Dreams
2002 Only Time - The Collection