This post contains references to products from one or more of our advertisers. We may receive compensation when you click on links to those products. The content on this page is accurate as of the posting date; however, some of the offers mentioned may have expired. For more information check out our Advertising Disclosure. Got your heart set on getting to Japan this spring without spending a small fortune or emptying your piggy bank of points? We got you – and so does United Airlines. With little fanfare, United launched an award sale on Tuesday to book roundtrip flights to Japan in economy this spring for just 50,000 United miles.…