Mobile data in Honolulu and across the Hawaiian islands

Check the coverage list before you pay

This is the one thing Hawaii asks of you that the mainland does not. A travel eSIM sold as a United States plan is not automatically a Hawaii plan — some US products cover the 48 contiguous states and stop there, and Hawaii sits 2,400 miles off the coast in a different licensing and roaming picture.

We have not independently verified any provider's Hawaii footprint, so we are not going to tell you which ones include it. What we can tell you is that the coverage list on the product page is the thing to read, and that it takes ten seconds. If Hawaii is not named, assume it is not covered and pick something else.

That one check aside, everything below applies to any plan you end up with. None of the providers we track for the United States publishes which American network it roams onto, so there is no carrier-based way to choose between them here either.

Oahu behaves like a mainland city

Coverage across Waikiki, Honolulu, the North Shore and most of Oahu is excellent, with 4G averaging around 45 Mbps in the city. Nothing about a Waikiki-and-Pearl-Harbor trip will test a plan. If Oahu is the whole holiday, treat it as you would San Diego and buy on price.

The other islands are where it stops

The gaps are not urban dead spots — they are whole stretches of road and trail, and they are predictable enough to plan around.

Maui. Good in Lahaina, Kihei, Wailea and the main tourist areas. Rural Maui has significant gaps: the Road to Hana is only partially covered along the highway itself, and some of the waterfalls and side trails off it have nothing. Download the route offline before you set out, not at the first pullout.

Big Island. Excellent in Kona and Hilo. In Hawaii Volcanoes National Park there is signal around the visitor centre area and gaps on the backcountry trails; Chain of Craters Road has minimal signal along most of its length.

Kauai. Good in Lihue and Poipu. The Na Pali Coast has no signal, which is a function of terrain and of how the coast is protected rather than an oversight. The Kalalau Trail is effectively offline for its whole length — download maps and tell someone your plan before you start it.

The practical rule for all three: whatever you will need on the trail has to be on the phone before you leave your base town. This is not a plan-size problem and no amount of data fixes it.

What to buy

Prices marked verified were read from the provider's own site on 13 August 2026; the rest are indicative. Airalo sells the US as two named tiers, Change and Change+ — the Change prices are below, and we cannot say what the dearer tier adds.

That row used to name eSIM Go at $17, and then eSIMCard. eSIM Go sells wholesale to resellers and publishes no consumer price — checked on esim-go.com on 18 August 2026, where there is no basket, no checkout and no per-country page — so its rows cannot be bought or ever verified. See our eSIM Go page. eSIMCard is a working storefront, but its prices have been withdrawn too: we read its own pages on 18 August 2026 and the figures we held were not the ones it charges. See our eSIMCard page.

A multi-island trip runs heavier than a city break because you navigate constantly and re-download maps for each island. 5GB to 10GB is the realistic band. If Hawaii is one leg of a longer American trip, note that the US ladder goes to 50GB — Airalo's Change tier at a verified $42 for 30 days is the cheapest per gigabyte in the whole table. The country-wide comparison is on our United States hub.

Buying a SIM on the islands

The US rule applies here as everywhere: no ID, instant activation, so a physical SIM is an ordinary shop purchase. Airport counters run around $20 and retail stores are cheaper. It is worth doing only if you want a US phone number — for a tour operator confirming a pickup, or a rental desk that will only text you a code.