Hajduk will start the new season on July 11, 2019, when they are playing UEL first qualifying round match. The second leg will take place a week later and Hajduk will learn their opponent on June 19, 2019, when the draw is taking place in Nyon.

In the first qualifying round, Hajduk is a seeded team and these are some of their potential opponents:

Levadia Tallinn (Estonia), Universitatea Craiova (Romania), DAC Dunajska Streda (Slovakia), Ružomberok (Slovakia), La Fiorita (San Marino), Torshavn (Faroe Islands), Chikhura Sachkere (Georgia), Mura Murska Sobota (Slovenia), Debrecen (Hungary), Torpedo Kutaisi (Georgia), Progres Niederkorn (Luxembourg), Milsami Orhei (Moldova), Honved Budapest (Hungary), Flora Tallinn (Estonia), Liepaja (Latvia), Cliftonville (Northern Ireland), Hibernians , KR Reykjavik (Iceland), Balzan (Malta), Shamrock Rovers (Ireland), Siroki Brijeg (BiH), Europe (Gibraltar), Connah's Quay (Wales), NSI Runawik (Faroe Islands), Banants Yerevan (Armenia), St. Patrick's Athletic (Ireland), FK Skupi (Northern Macedonia), Pandev Academy (Northern Macedonia), Macedonia GjP (Northern Macedonia), Petrocub Hincesi (Moldova), Speranta Nisporeni (Moldova), Teuta Durres (Albania), KuPS Kuopio , RoPS Rovaniemi (Finland), Inter Turku (Finland), Breidablik (Iceland), Stumbras Kaunas (Lithuania), KI Klaksvik (Faroe Islands), Pristina (Kosovo), RFS Riga (Latvia), Lori Vanadzor (Armenia), Gzira United (Malta), Trans Narva (Estonia), Zeta Golubovci (Montenegro)...

Hajduk will be a seeded team in the second qualifying round as well, should they qualify to it. These matches are taking place on July 25 and August 01, 2019 and their unofficial potential opponents may be:

Dinamo Tbilisi (Georgia), Cork City (Republic of Ireland), Olimpija (Slovenia), Neftči, Sabail (Azerbaijan), Lokomotiv Plovdiv (Bulgaria), Radnik Bijeljina (BiH), CSKA Sofia (Bulgaria), Makabi Haifa Lechia Gdansk, Cracow (Poland), Tobol, Ordabasy (Kazakhstan), Fola (Estonia), Vaduz (Liechtenstein), Zrinjski (BiH), Kairat (Kazakhstan), AEL Limassol (Cyprus), Alaškert (Armenia) Serbia), Kilmarnock (Scotland), Šahtar Soligorsk, Vitebsk (Belarus), Domžale (Slovenia), Crusaders (S. Ireland), Ventspils (Latvia), Stjarnan (Island), Norrköping (Sweden), Haugesund, Viitorul (Romania) ...