I'm coming at this after rereading the book a couple times, so I'll try to lay it out without ruining the feel of it. After that big confrontation at the airport, Leah finally gets to tell Noah everything—how they grew apart, how she met someone else, how her life took a path he didn't see. The final chapter isn't a grand reunion scene in the way you might expect. They meet in their old London pub, the one from the beginning, but it's just a conversation. It's full of 'what ifs' and quiet apologies and this heavy, realistic acknowledgment that you can't just erase five years.
The ending is them walking out separately, with Noah watching her leave. The last line is something about the city lights blurring, and him realizing that closure sometimes looks a lot like letting someone go. It doesn't tie things up with a bow. For me, it felt devastating but honest, like the author respected the characters too much to force a fairytale. I know some people really wanted them to end up together, but that final choice made the whole story stick with me longer.