Among her notable concert appearances are Mahler Symphony No.8 (Frankfurt Radio Symphony Orchestra under Paavo Järvi, Philharmonia under Lorin Maazel and Accademia Nazionale di Santa Cecilia under Sir Antonio Pappano); Mahler Symphony No.4 (Prague Symphony Orchestra under Jac van Steen and the Hallé under Sir Mark Elder) and Mahler Symphony No. 2 (Accademia Nazionale di Santa Cecilia under Myung-whun Chung); Verdi Requiem (Ludwigsburger Schlossfestspiele under Michael Hofstetter); Haydn The Creation (CBSO under Andris Nelsons); Handel Messiah (Academy of Ancient Music under Richard Egarr) and Vaughan Williams Hodie at the Royal Concertgebouw in Amsterdam. She performs regularly at the BBC Proms where she has performed Bella in Tippett’s A Midsummer Marriage (BBC Symphony Orchestra under Sir Andrew Davis) and Glière’s Concerto for Coloratura Soprano (Bournemouth Symphony Orchestra under Kirill Karabits).
In recital Ailish works regularly with pianist including Iain Burnside, James Baillieu, Graham Johnson and Christopher Glynn, amongst others, giving recitals at venues and festivals including Wigmore Hall, Edinburgh, City of London, Gregynog, St. Magnus, Brighton and West Cork Music Festivals, and the Vinterfespill in Norway.
Her discography includes Fauré Mélodies (Opus Arte), Nacht und Träume (Delphian), From a City Window Hubert Parry Songs (Delphian) and An Irish Songbook (Signum Classics) all with pianist Iain Burnside, Il re pastore for Classical Opera (Signum Classics), Michael Head Songs (Hyperion) with Christopher Glynn, Messiah with the Academy of Ancient Music (EMI), Mahler Symphony No.8 under Valery Gergiev (LSO Live) and with the Philharmonia Orchestra under Lorin Maazel (Signum Classics).