It's nowhere near the closest station to grab their subway, but it's the busiest rail station in the world. Also, Clint learned how to navigate it during a ridiculous three month mission that involved way too much time in the place.

(It's also protocol.)

They're maybe quieter than a couple normally would be on a taxi ride, but Clint is clearly tired so it might be written off as giving each other space. He pays the fare, when they arrive, and keeps his door open for Romanova, scanning the crowd.

The rest of the trip is fairly uneventful, even though it does include Clint employing a nasty glare and an arm around Romanova's shoulders a few times, to ward off the usual subway crowding. Normally he wouldn't mind, but he really doesn't want someone to stick either of them with something toxic.