I don't quite get the question. You can't "save" web pages on an iPhone either, at least not with the built-in Safari on my iPhone 3G w/iOS 4.0. But you don't need to save the pages at all: the airlines whose electronic bps I've used send you an e-mail containing a hyperlink when you've checked in online. When ready to board, you open the hyperlink to reveal a web page containing the barcode.