In 1919, SK Aston Villa Mladá Boleslav has registered for league competitions, playing home games at the Astonka pitch near Havlíčkova Street.

[1][2] In 1942 and 1944 respectively, Mladoboleslavský SK and Aston Villa did not take their chances to make it to the top Czechoslovak competition from the final stage of the qualification.

[3] However, the old pitch, which is still called Astonka, still exists today and the youth teams of FK Mladá Boleslav play matches there.

[1] In the summer of 2002, Josef Dufek publicly announced a five-year plan during which the second-league club was to become a participant in European cups.

[6] However, the club was eliminated after reaching the group stage, taking just 3 points from 4 matches (Panathinaikos 0–1, Hapoel Tel Aviv 1–1, Paris Saint-Germain 0–0, Rapid București 1–1).

Qualification for the group stage was only narrowly secured by beating Palermo 4–2 on penalties after a nail biting 1–1 aggregate scoreline.

In their group Mladá Boleslav defeated IF Elfsborg 3–1, but again failed to reach the knockout stages of the competition after losing matches against Villarreal 1–2, AEK Athens 0–1 and Fiorentina 1–2.

These results guaranteed FK Mladá Boleslav a place in the qualifying rounds of European cups, but the club never managed to advance to the group stage during this era.

In that season FK Mladá Boleslav finished 7th, but won the play-offs for participation in the 2019–20 UEFA Europa League qualifying rounds.

In January 2020, Komlichenko transferred to FC Dinamo Moscow for a fee of around 3.5 million EUR, a record in the club's history.

After the season, David Trunda bought a majority stake (51 %) in the club and became its president, ending the 21-year era of Josef Dufek.

[1][11] Note: Flags indicate national team as defined under FIFA eligibility rules; some limited exceptions apply.

[14] In the 2023–24 season, the highest number of goals in one game in the history of the Czech First League was seen in the match Zlín–Mladá Boleslav, which ended 5–9.