Originally Posted by
ExplorerWannabe
The only way I was finally able to contact UA without leaving the airport and entering Singapore was to search online for a non-toll-free phone number for UA customer service
For future reference, both Skype and Google Talk allow calls to US toll-free numbers at no charge. You can reach the main UA numbers anywhere you can find WiFi access.
And, for that matter, the number to call is (800) UNITED-1 -- (800) 864-8331. Just in case someone does come across this thread and needs it.