The Scottish champions are 2-0 up from the first leg of their second-round qualifier with the second leg in Iceland next Wednesday.
If Celtic progress, they will be at home for the first leg of the tie against Azerbaijani team Qarabag or Rudar Pljevlja of Montenegro.
The two teams shared a 0-0 draw in the first leg in Baku with the second leg also taking place on Wednesday night.
Full draw (ties to be played July 28-29 and August 4-5):
Non-champions route: Panathinaikos (Gre) v Bruges (Bel, Young Boys (Sui) v Monaco (Fra), CSKA Moscow (Rus) v Sparta Prague (Cze), Rapid Vienna (Aut) v Ajax (Net), Fenerbahce (Tur) v Shakhtar Donetsk (Ukr)
Champions route: Sarajevo (Bos) or Lech Poznan (Pol) v Basel (Sui), Ludogorets (Bul) or Milsami Orhei (Mol) v Skenderbeu (Alb) or Crusaders (NIr), HJK Helsinki (Fin) or Ventspils (Lat) v Maribor (Slv) or Astana (Kaz), Celtic (Sco) or Stjarnan (Ice) v Qarabag (Aze) or Rudar Pljevlja (Mon), Trencin (Svk) or Steaua Bucharest (Rom) v Partizan (Srb) or Dila Gori (Geo), Midtjylland (Den) or Lincoln Red Imps (Gib) v APOEL (Cyp) or Vardar (Mac), Hibernians (Mal) or Maccabi Tel-Aviv (Isr) v Viktoria Plzen (Cze), Fola Esch (Lux) or Dinamo Zagreb (Cro) v Molde (Nor) or Pyunik (Arm), The New Saints (Wal) or Videoton (Hun) v BATE Borisov (Blr) or Dundalk (Ire), Salzburg (Auta) v Malmo (Swe) or Zalgiris Vilnius (Lit)