Having finished 36th at the Ladies European Tour Qualifying School in 2003, Blomqvist had conditional status for 2004 when making her Ladies European Tour debut in Tenerife where she finished fourth. She won her maiden LET tournament later in the year in Hungary and gained her first top ten finish in a major at the Women's British Open during which she shot a record low score of 62. She had five other top twenty LET finishes in 2004 together with another win at the Öijared Ladies Open on the Telia Tour. and was the LET Rookie of the Year.