A nationwide flight disruption on Friday rippled straight into America's cruise ports, with several major lines pushing back Saturday departures so stranded travellers could still make their ships.

The most eye-catching delay involved Royal Caribbean's brand-new Legend of the Seas, fresh into its first North American season. The 5,610-guest ship pushed out the final check-in window to 6:15 PM before starting an eight-night Eastern Caribbean sailing from Fort Lauderdale.

Port Everglades saw a string of other adjustments too. Star Princess left roughly four hours behind schedule at 7:00 PM, while Holland America's Eurodam sailed two hours late at 6:00 PM.

Down the road in Miami, the reshuffle was just as busy. Carnival Magic slipped two hours to 5:30 PM ahead of an eight-night Caribbean run, and Royal Caribbean's Icon of the Seas — the biggest ship in the world — departed two and a half hours late at 7:00 PM on a seven-night Western Caribbean itinerary. Norwegian Cruise Line moved Norwegian Luna's seven-night Caribbean sailing four hours to 8:00 PM, and MSC Cruises held MSC World America back by two hours for the same reason: getting flight-affected guests aboard.

The airlines weren't the only ones making gestures. Disney Cruise Line gave arriving passengers free Wi-Fi on Saturday so they could chase down rebooking options with their carriers.

For anyone booked on a cruise out of a U.S. port, this is a useful reminder of how lines handle disruption. When flights collapse en masse, cruise operators generally delay sailings rather than leave people behind — but the grace is finite. Check-in deadlines still exist, and once a ship has to sail, latecomers are on their own. If you're flying to a cruise, arriving the day before departure remains the single best insurance policy. And if your ship is delayed, keep an eye on the line's app and email, since revised boarding times are usually communicated there first.

The weekend also showed the practical upside of cruising from Florida's big ports: with so many ships sailing from Fort Lauderdale and Miami, lines had both the incentive and the flexibility to wait a few hours for passengers whose flights fell apart. It cost them little and saved a lot of holidays.

Travellers with upcoming sailings should watch for similar schedule shuffles whenever air travel hits turbulence — and build a buffer day into the trip if the cruise matters.