People searching for the best volcano to visit in Lanzarote are usually asking a simpler question than it looks: of all the cones on this island, which is the one to spend a morning on? The honest answer is that the thing worth visiting is not a single cone at all — it is the field of them in the south, protected as Timanfaya National Park, and the way to see it is the loop road through the middle with $68 or $68.
If you want to stand on it, the answer is different, because that has to happen outside the park road. The three guided walks — $48 at 4.9, $50 at 4.8 and $54 at 4.8 — work the flows that the eruption of the 1730s laid down beyond the protected boundary. Same rock, same century, your own boots on it.
If you want to cover ground, $172 is the only listing here where you drive, and the tracks it uses take in the northern part of the island as well. At 5,513 reviews it is the most booked thing on this site, and two to three hours of it in the morning air is a very different memory from a coach window.
And if you have one day only, $102 is the nine-hour version that takes in the park, Jameos del Agua and Cueva de los Verdes together. It is a long day, it is the second most reviewed listing on this site at 2,845, and it does mean you are not choosing.