The Australian major winner carded a bogey-free five-under 67 to finish five shots adrift of World No.1 Jin Young Ko.

South Korean Ko missed most of the LPGA season but closed with a birdie for a six-under 66 on Sunday to get to 18-under 270 and seal the year-long money title – despite only playing four events in her truncated campaign.

What made the difference for Ko was taking out the biggest prize in women's golf for her latest victory – $1.1 million ($A1.4m).

"I still can't believe it, that I'm here, that I won this tournament," Ko said.

Green and World No.2 Sei Young Kim ended the week in Naples, Florida at 13-under par to each take home $209,555 ($A274,826).

Kim, who took a one-shot lead into the final round, shot 72 and that was good enough for her to clinch player of the year honours.

"I still can't believe it, that I'm here, that I won this tournament." - Jin Young Ko.

Mina Harigae (68) was fourth at 12 under while Kiwi former World No 1 Lydia Ko (69) and Lexi Thompson (70) were tied for fifth a shot further back.

Australia's World No.8 Minjee Lee could only manage two birdies on Sunday as she slipped out of the top 10 on Sunday with a 74, to leave her tied for 13th at seven under.

Katherine Kirk (71, five under) and Sarah Kemp (72, two over) rounded out the Australian contingent – as Sunday marked the end to the 18-event LPGA season that was cut almost in half by the COVID-19 pandemic.

A seventh LPGA title wrapped up a wire-to-wire year in the No.1 spot for Ko, who has held the ranking since July 29, 2019.

She won $1,667,925 ($A2.2m) in 2020 to take her career earnings to $5,600,824 ($A7.3m), making her the 71st player in LPGA history to cross the $5m ($A6.6m) mark.

The next season is scheduled for 34 events, starting with the Diamond Resorts Tournament of Champions in Lake Buena Vista, Florida, in January.