Why is Tonga on the no travel list?

The wording of this Google question does not establish that Tonga is on a “no travel” list. Check the current advisory that applies to you rather than treating a search question as a travel restriction.

Which advice applies to you?

Read the current Tonga page published by your own government, including the full advice and its update date. Different governments can use different categories and wording. A search snippet or a screenshot without a date is not enough to establish the current position.

Travel advice is not entry permission

A government travel advisory, permission to enter Tonga and an airline’s boarding requirements answer different questions. Confirm the rules for your passport and purpose of travel separately through the appropriate Tongan authority. See our visa and entry guide for the checks to make.

Read beyond the overall rating

Consider transport and activity safety, swimming conditions and access to medical care when planning. An overall advisory rating is not a guarantee that every place or activity is safe. Read the sections relevant to your itinerary and check that your insurance covers the activities you choose.

Before departure, check official advice again, review weather and warnings, and reconfirm your transport with the operator. If you have seen a specific warning, compare its country, date and issuing authority with the current official page.