Glad to ear that you've been able to get your son to buy your tickets. The fact that the Southwest website is unavilable at many locations outside of the US is a well documented issue. Suggestions that have seemingly had some success are 1) Trying to use a US based VPN 2) Try using the Southwest cell app and utilizing cell data (as opposed to wifi) Apparently there is some cost involved in having the website available outside of the US, and the company is evaluating whether or not it makes economic sense (tickets purchased vs cost of the having the website available) to do so.
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