Royal Caribbean's Kids Sail Free promo drops your 3rd and 4th guests' cruise fare to $0 on qualifying sailings. Here's how it actually works, when it runs, what you still pay, and how to combine it with other discounts.
Quick Answer
Royal Caribbean Kids Sail Free drops the cruise fare for the 3rd and 4th guests (ages 12 and under) in a cabin to $0, saving $600 to $1,200 per child on cruise fare alone. The promo runs 4 to 6 times a year for 7 to 14 day booking windows on select sail dates.
The 3rd and 4th guests in a cabin (ages 12 and under) cruise free, though taxes, port fees, and gratuities still apply.
Royal Caribbean Kids Sail Free is a recurring promotion where the cruise fare for the 3rd and 4th guests in a single cabin drops to $0. You still pay taxes, port fees, and gratuities for those guests (usually $150 to $300 per child total), but the cruise fare itself is free, often a $600 to $1,200 per-child savings.
The promo runs 4 to 6 times a year, usually for a 7 to 14 day booking window, on select sail dates 6 to 18 months out. Not every ship or sail date qualifies. The fastest way to find out if your dates work is to send me your trip details and I'll check the current promo against your sailing.
Only guests 3 and 4 in the same cabin qualify, ages 12 and under, and you still pay their taxes, fees, and gratuities.
The rules are stricter than the marketing makes them sound. Here's what you actually need to know:
The promo runs roughly 4 to 6 times a year, with the broadest windows in January and around Black Friday.
Royal Caribbean runs Kids Sail Free roughly 4 to 6 times per year. The promo windows in 2025 and 2026 have followed this pattern:
The exact dates aren't published in advance, but I track every promo as it drops. If you want me to alert you when the next Kids Sail Free window opens, email me and I'll add you to my list.
A family of 4 on a 7-night Wonder of the Seas balcony can save about $1,500 total under a Kids Sail Free promo.
Here's a realistic example for a family of 4 booking a balcony on Wonder of the Seas, 7 nights, during a Kids Sail Free window:
| Line Item | Without Promo | With Kids Sail Free |
|---|---|---|
| Adult 1 (cruise fare) | $1,100 | $1,100 |
| Adult 2 (cruise fare) | $1,100 | $1,100 |
| Child 1 (age 8, cruise fare) | $750 | $0 |
| Child 2 (age 6, cruise fare) | $750 | $0 |
| Port fees + taxes (all 4) | $520 | $520 |
| Gratuities (all 4) | $504 | $504 |
| Total | $4,724 | $3,224 |
That's a $1,500 savings on a single sailing. Same cabin, same itinerary, same experience.
Book within the first 48 to 72 hours of a promo window opening, since the deepest discounted inventory sells out fast.
The easiest way: send me your dates and I'll watch for the next promo, run the math on your specific sailing, and book it the same hour it opens.
Watch for inflated base fares, suite exclusions, and holiday blackout weeks that can quietly limit the promo's value.
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