Westcott's courses are regionally accredited through Brandman University. This means that every university in the US that accepts transfer credit should accept these online courses for college credit.
You should confirm with your academic advisor or registrars office that these courses will be accepted before enrolling. Westcott have a handy page on their website which gives detailed information about how to transfer their online courses for college credit.
Their courses are 100% self-paced and asynchronous, meaning that they are perfect for taking while traveling!