[13] Booth moved on loan to Dutch club FC Utrecht in 1998, seeking more playing time to secure his place in the Scotland squad for the 1998 FIFA World Cup.

[15][11] A year later he moved to another Eredivisie side, Vitesse Arnhem, again on loan,[11] and contributed to a strong season where the club only missed out on Champions League qualification by a goal difference of two.

[11] In the following season he had to fight for his place, and was close to returning to Scotland to play under former manager Alex Smith;[16] he also made his last appearances in continental competition in the 2001–02 UEFA Cup.

[20] Having gained a UEFA Pro Licence, Booth was appointed by the Scottish Football Association as Scotland under-15 and under-16 assistant manager in December 2011, working under Mark Wotte.

[23] Booth was appointed head coach of Scottish Women's Premier League club Glasgow City in July 2015,[24][25] taking over from Eddie Wolecki Black.

[30][31][32][33] Glasgow City won the SWPL again in 2018,[34] but they did not win either domestic cup and were heavily beaten by FC Barcelona Femení in the Champions League; media observers suggested Booth may have reached the limit of what he could achieve at the club, with little hope of making an impact in Europe given the superior resources of the fully professional clubs from the leading nations, and any interruption to dominance in Scotland being viewed as failure.

[35] In the 2019–20 UEFA Women's Champions League Booth led Glasgow City to the quarter-final, their joint-best finish in Europe, before they succumbed to a heavy 9–1 defeat to eventual finalists Wolfsburg.

[39][40] On 24 October 2024, Booth was appointed head coach of Aberdeen Women in the SWPL, leaving a post as assistant to Leanne Ross at Glasgow City he had taken up three months earlier.