In multiplayer a variation of the Sword Flying technique exists, but it requires split-second timing and performing it consistently is difficult.

With the sword as your reserve weapon, take another weapon and find a target; a scoped weapon with a reticle that turns red when locked on a target in range, such as the rocket launcher, is preferable.

Then, switch to the sword and pull the trigger. If the switch and pull are timed correctly, you'll perform a lunge attack regardless of the distance between you and the target.