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Вот тут хорошие переводы:
https://context.reverso.net/translation/russian-english/%D0%BD%D0%B0%D0%BB%D0%B5%D1%82%D0%B5%D0%BB

Your choice here has to be: to have covered (a distance of).

"Налетал" here means that by then it was in total. I think prefix "на-" makes it perfective.

Налетал, набрал, насобирал, накопил.

Here more: https://explorerussian.com/russian-verb-prefix-ha/