Sunderland self-destructed after that, with two errors from Lee Cattermole handing Hull a second and third goal.
First, Cattermole failed to clear a bouncing ball to allow David Meyler to finish the counter-attack with a slick finish, then the Sunderland skipper's loose backpass was seized upon by Matty Fryatt, who finished easily past Ustari.
The win means Hull go to Wembley for only the second time in their 110-year history, while Sunderland are denied a second appearance at the national stadium this season.
3' - OFF THE BAR: Figueroa swings in a speculative cross from the left that sails over the head of goalkeeper Ustari and grazes the bar.
25' - HULL CHANCE: Elmohamady whips in a cross from the right that Fryatt meets with a superb diving header, but he glances it just wide.
33' - PENALTY SAVED: Ustari gets down low to his right and pulls off a good save from Aluko's penalty, after the Hull forward was tripped by Larsson.
37' - GOOD SAVE: Ustari makes another vital stop. It opens up for Rosenior 30 yards out and the full back drills a low shot at goal, but the Argentine keeper pulls off a good save to his right.
68' - GOAL! Hull 1-0 Sunderland: Davies rises high to head in Huddlestone's free-kick from the right.
72' - GOAL! Hull 2-0 Sunderland: Hull score another after a mistake by Cattermole, who fails to clear a high bouncing ball. Meyler beats him to it, closes in on goal and finishes well.
77' - GOAL! Hull 3-0 Sunderland: Another glaring mistake by Cattermole as his backpass goes straight to Fryatt, who finishes easily to but the result beyond doubt.
This is Hull's first FA Cup semi-final since 1930 which secures only the second Wembley appearance in their history.
Steve Bruce will be looking to guide Hull to the final of a competition that he won three times as a player with Manchester United.
Gus Poyet was looking to become the first Sunderland manager to guide the club to two Wembley appearances in one season.
Can Hull go all the way? Having been drawn against Sheffield United, they should reach the final. As Wigan showed last year, the underdog can still upset the odds in the cup.
MAN OF THE MATCH
Curtis Davies (Hull) - Another towering performance by the centre-back, who scored the crucial opening goal. Is Davies the best uncapped English player in the country?
Hull: McGregor 7, Chester 7, Davies 9, Figueroa 7, Elmohamady 7, Meyler 8, Huddlestone 7, Aluko 6, Rosenior 7, Fryatt 7, Sagbo 6. Subs: Koren 6, Boyd 7, Quinn N/A
Sunderland: Ustari 7, Bardsley 6, Vergini 6, O'Shea 6, Dossena 6, Cattermole 4, Giaccherini 7, Larsson 6, Colback 6, Scocco 6, Fletcher 5. Subs: Johnson 6, Borini 6.
THE MATCH IN A TWEET
FT: #HCFC 3-0 #SAFC: Cattermole claims rare but spectacular assist as Sunderland self-implode to be denied immediate Wembley return.
- Sports & Recreation
- Curtis Davies
- Lee Cattermole
- Hull City
- Oscar Ustari
- Sone Aluko
- Tom Huddlestone