1000 miles in a vacuum is 5.36 ms. Don't forget that it's up and back two times so you're looking at just over 21 ms waiting on light. The packet actually needs to go onto the Internet at that point too.
10 ms is roughly datacenter lag (or was a few years back). 100ms is good cross-country pings, 300-600 is continent-to-continent links.
Figure on edge caching aas well.
Way back in the day (10-15 years ago) my friend with satellite Internet had 300+ ms pings everywhere and at the time a dial-up modem was still required. Good to know things have changed.