Free single supplement is available on select 2024 departures. Full payment required. Single supplement is applied to the 2-for-1 fare; single guest pays one guest fare. Free single supplement is not combinable with any other offers. Other dates may have a 45% single supplement; can be converted to a 25% supplement when paid in full within 30 days of booking or 90 days prior to departure; whichever is soonest.  Departures outside of 11 months can pay in full at 10 months prior to departure to receive these benefits. Single supplement offers not applicable on RP, RR, RO, R, RA, RD, RS or RJ categories. Not combinable with any other offers. Offer is capacity controlled.