When is the last time the usa missed the world cup?
The United States men's national soccer team has played in several World Cup finals, with their best result occurring during their first appearance at the 1930 World Cup, when the United States finished in third place. After the 1950 World Cup, in which the United States upset England in group play 1–0, the U.S. was absent from the finals until 1990. The United States has participated in every World Cup since 1990 until 2014, but they failed to qualify for the 2018 competition after a loss to Trinidad and Tobago in 2017. 
When was the last time the USA men's national soccer team missed the World Cup?
2018 21st FIFA World Cup 2018 FIFA World CUP
United States at the FIFA World Cup
No context provided
When was the last time the USA women's national soccer team missed the Women's World Cup?
Never
United States at the FIFA Women's World Cup
https://en.wikipedia.org/wiki/United%20States%20at%20the%20FIFA%20Women%27s%20World%20Cup
United States at the FIFA World Cup
https://en.wikipedia.org/wiki/United%20States%20at%20the%20FIFA%20World%20Cup
The United States women's national soccer team is the most successful women's national team in the history of the Women's World Cup, having won four titles, earning second-place once and third-place finishes three times. The United States is one of the countries besides Germany, Japan, and Norway to win a FIFA Women's World Cup (China 1991, United States 1999, Canada 2015, France 2019). The United States are also the only team that has played the maximum number of matches possible in every tournament.
United States at the FIFA Women's World Cup
The United States men's national soccer team have participated in ten World Cups: their best result occurred during their first appearance at the 1930 World Cup when they finished in third place.[1] After the 1950 World Cup, in which the United States upset England in group play 1–0, the U.S. was absent from the finals until 1990. The United States has participated in every World Cup since 1990 until 2014, but they did not qualify for the 2018 competition for the first time since 1986 after a loss to Trinidad and Tobago.
United States at the FIFA World Cup
The United States men's national soccer team have participated in ten World Cups: their best result occurred during their first appearance at the 1930 World Cup when they finished in third place. The United States has participated in every World Cup since 1990 until 2014, but they did not qualify for the 2018 competition for the first time since 1986 after a loss to Trinidad and Tobago. The United States women's national soccer team is the most successful women's national team in the history of the Women's World Cup, having won four titles, earning second-place once and third-place finishes three times. The United States are also the only team that has played the maximum number of matches possible in every tournament and have never missed a World Cup.