The Open University - Liberal Arts degree (only £6,192 GBP! fully online)

[allvia]

Open University may be located in the UK (also worldwide well known/respected), but they are one of the few international universities that are RA - https://www.msche.org/institution/9158/

I would not consider them in the class of the Big3 - affordable yes, but they are a more traditional online/distance; where the Big3 offer high numbers of Alt Credit sources transfer in - allowing for expedited completion. I'll add that they do offer a number of interesting master options.