Deal watch: Royal Caribbean kicks off holiday sale

No vacation plans yet for the summer? You might want to take a look at the latest promotion from Royal Caribbean.

In a Fourth of July weekend sale, the line is offering airfare credits of up to $2,000 to those making new bookings for seven-night Adriatic cruises in July and August. The sailings, on the 3,114-passenger Voyager of the Seas, are roundtrip out of Venice, Italy and include calls in Koper, Slovenia; Ravenna and Bari in Italy; and Dubrovnik, Croatia.

Under the terms of the offer, passengers who use Royal Caribbean's ChoiceAir program to book round-trip flights to Venice from major U.S. gateways will get a credit of $2,000 per cabin if booking a suite, $500 for a balcony cabin, $400 for an ocean-view cabin, and $300 for an interior room.

Royal Caribbean also has unveiled a "Bring a Friend" offer for members of its frequent cruiser club, the Crown & Anchor Society. Under the terms of the promotion, members will receive a $25 onboard credit for booking a trip by July 31 with someone who is a new customer for Royal Caribbean. The offer is good on up to five rooms per sailing.