From personal experience and what most travelers say—it’s usable, but definitely not something you should rely on. Most trains heading to New York (like Amtrak or NJ Transit) offer onboard Wi-Fi, but the performance is inconsistent. It works fine when the train is moving through cities or areas with strong network coverage, but once you hit tunnels, remote stretches, or even just crowded network zones, the connection drops or slows down significantly.
If your work depends on stable internet like video calls, uploading files, or streaming, it can get frustrating really fast. However, for light tasks like checking emails, browsing, or messaging, it’s usually okay.
A better approach is to download anything important beforehand and treat Wi-Fi as a bonus, not a guarantee. Many people actually end up relying more on their mobile data hotspot instead.
Train Wi-Fi is convenient but unreliable for high-dependency tasks.