Not really, most airports are way too big to really be pedestrian accessible. San Diego and DCA are probably among the best, and both are tiny at 650 to 750 acres. Even medium sized airports like ORD are 10 times larger with large airports nearly 60 times larger. You just can't make walking across 7000 acres "easy."

But there are many transit-accessible airports including Chicago and London. Honestly, DCA isn't too bad for that, and this bridge is an improvement. Although the bridge is a typical nova silliness of building a giant ludicrous structure to make up for poor original design.