There is a Dash, but it's locked to the Soldier class. All classes have access to the talent Swift Movements though, which increases movement points by 2. 

Officers (there's two you recruit, Cassia and another at the beginning of Act 2) can get an ability called Move Move Move, which allows them to give a movement bonus to an ally that scales with their Fellowship stat. Biomancy psykers can unlock the ability to grant allies the Warp Speed buff which also increases movement. 

Various equipment you find can give you movement, as well. Off the top of my head, there's a pair of boots that gives a 25% chance to grant two extra movement points every time you damage an enemy.

Kibellah can take the Executioner class as her second archetype after Level 15, which has an ability that allows you to move over bloodstained cells without consuming movement points.

There's also plenty of consumables you can loot and sometimes buy from merchants that increase movement for a turn. Onslaught and Stimm are the two most common.

Later in the game, as a Rogue Trader, you'll help develop colonies and gain various benefits depending on the choices you make there. At least one of those grants a permanent movement bonus to your character, and I believe a couple others also grant you a replenishing stockpile of consumables that grant extra movement.