Holafly

A long US road trip or a multi-city itinerary is exactly the kind of use case Holafly is built for: instead of estimating how many gigabytes a month of navigation, streaming, and hotspotting will use, you pay one flat price and stop thinking about the number. Its US plans run from short trips up to a full 90 days, longer than most competitors bother offering for a single country.

The same fair-use caveats that apply to Holafly everywhere apply here. Independent testers have found speeds slowing after somewhere between roughly 4.5GB and 10-15GB of use in a day, with normal speed returning the next day, so it's genuinely close to unlimited for typical browsing, maps, and social media but not a substitute for an unmetered home broadband connection. Hotspot sharing is separately capped, usually 500MB to 1GB a day. It's data-only, with 24/7 chat support if something goes wrong mid-trip. It suits US visitors on longer, data-heavy trips who value not having to check a usage counter over squeezing out the cheapest possible per-gigabyte rate.