The 18-year-old winger was due to return to Upton Park after this weekend's clash at York, but went back early to play in a development squad fixture for the Hammers against Manchester United on Friday.
Bradford manager Phil Parkinson told the club's official website: "Blair did really well for us and I'm sure he's going to be a great player.
"He wasn't a moment's problem during his time here and we really do wish him all the best in the future.
"He's a good lad and did well for us during the periods he was involved."
Turgott, yet to make his first-team debut at West Ham, made 11 appearances for Bradford after arriving at the end of November and played in the Capital One Cup clashes with Arsenal and Aston Villa, both home and away.