Flying Thunder God Technique

The technique of Minato which gave him the nickname "The Yellow Flash of Konoha" (木ノ葉の黄色い閃光, "Konoha no Kiiroi Senkō"), this technique allows the user to move over large distances with ultra-high speed, possibly at the speed of light. Although it is often compared with the Body Flicker Technique, the speed of this jutsu is much greater and the principle behind the Flying Thunder God is similar to the Summoning Technique.
 * Name:
 * Type: S-class, Supplementary, Long Range (0-10m)
 * User: Minato Namikaze

To activate this jutsu, the user needs a special seal or "Jutsu formula" (術式, "Jutsu-shiki") to mark the destination. After this is done, the user can almost instantaneously transport himself to that location. The Fourth applied the formula in advance to weapons such as kunai. It is also possible to leave a formula in an area touched by the user. It is because of this technique that Konoha came out victorious in the Third Great Shinobi War. It is also one of the few non Kekkei Genkai technique which can't be followed by the Sharingan and the Byakugan.

Trivia
The name Hiraishin is also the phonic of the Japanese word 避雷針, which means lightning rod; this may suggest the reasoning as to why the technique is restricted towards a seal, because lightning is attracted to lightning rods.

It is also a space/time jutsu and is not speed per se, but teleportation.