at long last vs at last

at long last and at last both are adverbs.

Word	Noun	Adjective	Verb	Adverb
at long last	No	No	No	Yes
at last	No	No	No	Yes

As adverbs, at long last and at last are synonyms defined as:

Other synonyms of at long last include finally, in the end, ultimately.

at long last (adverb)	at last (adverb)
as the end result of a succession or process	as the end result of a succession or process