This question comes from recent discussion in the question "What is the maximum distance you can cause damage from?"
The Unearthed Arcana Lore Mastery Wizard gets the Alchemical Casting feature which states:
[...] When you cast a spell with a spell slot, you can expend one additional spell slot to augment its effects for this casting [...]
An additional 2nd-level spell slot can increase the spell's range. If the spell's range is at least 30 feet, it becomes 1 mile [...]
I'm wondering how (if at all) this feature works with both the Spell Sniper feat and the Sorcerer's Distant Spell Metamagic:
When you cast a spell that requires you to make an attack roll, the spell's range is doubled.
When you cast a spell that has a range of 5 feet or greater, you can spend 1 sorcery point to double the range of the spell.
Do these allow you to make spell have a range of 4 miles, 2 miles, or still only 1 mile total?
Note that I am already aware that ordinarily the Spell Sniper feat and Distant Spell Metamagic work together, this is supported in the question "Does Spell Sniper and Distant Spell quadruple your range on attack spells?"