Williams' First Law of Travel: When traveling with someone who stresses about missing a flight, you must show up to the airport with them whenever they want to arrive, even if you're comfortable arriving at @Clear about the time the airline calls first boarding for your flight.

Not being facetious either. This is just how it needs to be. Your "I could have slept another hour" doesn't compare to the stress they would feel doing it your way.

For the record, I'm the guy that doesn't care about showing up last minute.