The exact reason I don't do cruise air. Totally unacceptable. Not only will you miss the afternoon if the airline is late anywhere along the route, you might miss the ship. See if you have options.
8 Norwegian: Sky, Jewel, Dawn, Epic, Pearl, Breakaway, Getaway, Escape
10 Windjammer: S/V Legacy X3, S/V Polynesia, S/V Caledonia, S/V Diamant, S/V Sagitta X2 S/V Mandalay, S/V Vela