Kasey headed straight home and was training with the team on Monday morning before catching another flight to head north ahead of Tuesday night's encounter at Tranmere.
Our jetsetting American was not complaining and was a happy keeper after his nation secured an unlikely place in Japan and South Korea.
"I had a game on Sunday against Jamaica, flew out after the game and arrived at eight o'clock on Monday morning. Took a bit of traffic coming from Gatwick and got back here in time for training.
"Then had to wait for the coach to fly up to Tranmere - so it was a busy 24 hours.
"I feel good. I'm so used to jetlag now that it just feels like a bad night's sleep, so there's no real problems there."
Events elsewhere went America's way on Sunday - and not just the result against Jamaica.
"It was good, we won 2-1. The other two results went our way, Mexico drew and Hondurus lost so that put us through and we've qualified now. We've now got a lot of work to do to get ready for the World Cup.
"I did not start and was a little disappointed there, but that's alright, now we've just got to get ready for the games that matter.
"We got off to a tremendous start in the second round of qualifying and then lost two games in a row and put ourselves under a lot of pressure. We were very fortunate on Sunday to have the other results go our way, Trinidad had one point going into the game and beat Honduras away, which was huge for us."
The American public turned out in force on Sunday to witness the team's qualification, but Kasey feels that safety fears due to the current climate reduced the numbers.
"There was 40,000 in Boston, it was alright, but we were expecting more. I think the circumstances happening kept a few people away.
Kasey was quick to dismiss the suggestion that the women's game is slightly more buoyant in the States at the moment, an assumption made by coverage of their recent World Cup success.
"No, nowhere near. For example the women's national team for that same game would've maybe had 5,000. The difference is, you are looking at team sports in America right now and the women's team have done well. Therefore, maybe they get a little bit more media attention, but otherwise and spactator-wise, no.
By Richard Hubbard
Kasey Keller had no time to celebrate the USA's qualification for the World Cup finals on Sunday night - he had a flight to catch and a training session to attend.