I’ll add, even though it has already been well answered! You might want to check out this link: [https://www.submarinecablemap.com/](https://www.submarinecablemap.com/) These cables were first introduced about 100 years ago for telegrams between North America and Europe, still the best way to get messages across oceans.
Shows all of the cables underneath the oceans, the math is broken down by u/Prestigious_Carpet29. SAT Communication is also possible, again some delay occurs depending on signal travel time at the speed of light to the satellite, to the user on the other end, back up to the satellite and down to you with the response but way too fast for us to notice.
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