With steady weather and fair winds the trip from Europe to the U.S can be done in 30 days by the best ships of that era. Modern high tech sailboats can do it in 5 days under the right conditions.
A bit less than 3000 nm. The only limiting factor would be human fear of unchartered waters. The Norse had it better because by taking the northernmost sub arctic route they would see landfall often enough to brave it. They however didn’t have the best ships for the voyage.
Yeah, I was appalled about the supposed expert on seafaring on one of those “who got where first” shows, he came up with the utterly ridiculous figure of 300 days for the trip to the Gulf of Mexico, and also came up with 300 days for the Polynesians (who were among the best if not the best pure sailors of any era) to get to California from Hawaii. Reminded me of the “public market” scene in Big Lebowski.