Airliner Speed - was Oldest Operational Boeing 707?

Curious - how long did a typical coast-to-coast flight take "back in the day".
That being the 707-DC-8 CV990 era? Seems to me that 4hrs or so was common, say IDW(JFK) to LAX, but I am not old enough to remember directly.

Me neither (I wasn't born yet :), but according to Boeing, this very
plane we've been talking about (Dash 80, N70700) set the transcon
speed record on Mar 11, 1957, by flying from Seattle to Baltimore in
3 hours 48 minutes. With the same pilot, by the way, who rolled it
over Lake Washington in 1955: Tex Johnston.

Curious - how long did a typical coast-to-coast flight take "back in the day".
That being the 707-DC-8 CV990 era? Seems to me that 4hrs or so was common, say IDW(JFK) to LAX, but I am not old enough to remember directly. Much faster than today - I suffered through a six hour 15 minute Newark-San Jose flight on a CO 737-700 a couple years ago. I am sure it used a lot less fuel, but yech!

IIRC the record for the fastest commercial US trans - con flight was set by
a TWA Convair 990 (?) back in 1962. The record still stands....

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Best
Greg