The Caribbean country will be joined by CONCACAF sides Panama and Haiti which also booked their spots on Tuesday (Wednesday AEDT).
Curacao finished as the only undefeated nation in the tournament and finished atop of Group B with 12 points to advance to the World Cup for the first time in its history.
Curacao got the historic result it needed despite not having coach Dick Advocaat on the bench.
The 78-year-old Advocaat missed the crucial match because he had to return to the Netherlands last weekend for family reasons.
Advocaat was at the helm of the Dutch national team for three stints and managed South Korea, Belgium and Russia before taking the job with Curacao.
According to the Central Bureau of Statistics in Curacao, the country has a population of 156,115 as of last January.
Iceland, with a population of just over 350,000 was the smallest country to reach the World Cup when it qualified for the tournament in Russia in 2018.
Panama advanced to its second World Cup after defeating El Salvador 3-0 with goals from Cesar Blackman, Erick Davis and Jose Luis Rodriguez.
The Panamanians only previous World Cup appearance was in Russia in 2018.
Panama finished as the best team in Group A with 12 points while Suriname, which came into the last round leading the way on goal difference, lost 3-1 against Guatemala and finished in second place with nine points.
Haiti, a troubled Caribbean country, had a surprising campaign winning Group C over favourites Honduras and Costa Rica after beating Nicaragua 2-1.
Loicious Deedson opened the scoring in the ninth minute and Ruben Providence added a goal in the 45th. Haiti's only previous trip to the World Cup was in Germany in 1974.
The Haitians finished with 11 points while Honduras had nine and Costa Rica finished with seven.
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