Gameplay

Frequent Flyer Miles

From Halopedia, the Halo wiki

Frequent Flyer Miles

Frequent Flyer Miles is an achievement in Halo: The Master Chief Collection. It is unlocked by beating the 8,000 point par score on the level The Great Journey. The achievement is worth 10 Gamerscore. Though it can theoretically be unlocked on any difficulty, more points are awarded in campaign scoring when playing on higher difficulties.