With Ciganda bogeying four of the final five holes, Lee found herself with a chance to win at the 18 tee, needing a par at the last to secure her first victory and just the third title for the Americans this year. She was the first-round leader after a 65, but dropped to second place behind Lang, the reigning U.S. Women's Open champion, after the second round.
Ciganda played the final five holes in four-over - making a double bogey on 14 and bogeys on 16 and 18 - for a two-over 70.
Lee shot a 4-under 68 in calm and firm conditions at Sky 72, saving par on 17 and birdieing 18 to stretch her margin over U.S. Women's Open champion Brittany Lang - her U.S. Solheim Cup teammate. It was the Pamplona native's first win on the LPGA Tour and earned her a winner's cheque for $300,000. She made a 4-footer on the par-5 18th, seeing the line when Cristie Kerr - the third member of the all-Solheim Cup (and all-PXG equipment) group - hit a bunker shot inches behind Lee's marker and holed her birdie putt.
A day after Se Ri Pak ended her Hall of Fame career in front of her home fans, Lang almost aced the 251-yard 15th.
Three other South Koreans are in the top 10 heading into the final day, including Park Sung-hyun, the seven-time victor on the Korea LPGA (KLPGA) Tour this year.
Ciganda finished the final round at 2-under-par 70 and at 10-under par for the tournament. He missed a 5-foot birdie on the 12th hole, his last of the day. It was becoming a comedy of errors but Ciganda was able to get up and down for birdie at the first extra hole to win.
Airlines that have banned Samsung's Galaxy Note7
And the ban goes on: On Sunday (Oct 16), Scoot and Tigerair also banned Samsung's Galaxy Note7 mobile device from all flights. The DOT originally threatened confiscation of the phones from any passengers attempting to board an aircraft with a Note 7.
Kadner: Cook County GOP chief stands by Trump
Trump also suggested the women who have come forward to accuse him were not physically attractive enough to merit his attention. Michelle Obama criticizes Donald Trump's comments about women as she campaigns for Hillary Clinton in New Hampshire.
Lydia Ko's 14 shots off the lead after three rounds of this week's LPGA Tour event in Korea.
Feng Shanshan from China and South Korea's Kim Min-Sun took the third spot on 280.
Langer had a bogey-free round at Prestonwood in the regular-season finale.
Meanwhile Kiwi golfers Steven Alker and Danny Lee have both made the cut at the weather-hit season-opening PGA Tour event in California.
Bland shot the lowest round of the day to move to 11 under par and overtake Alexander Noren and Andrew Johnston, who as playing partners shot 65s in the morning at The Grove course just north of London. The 59-year-old German star leads the tour with four victories and earnings of $2,512,659. I just tried my best and I tried to play each shot the best I could.
MACAU (AP) Zimbabwe's Scott Vincent shot a 7-under 64 in the Macau Open for a share of the second-round lead in the Asian Tour event. He was sidelined by an arthritic joint in his right foot.