What Are Interline Cruise Rates? A Complete Guide for Airline Employees
If you've worked in the airline industry for any length of time, you've probably heard the phrase 'interline rate' tossed around — usually in a hallway conversation, usually involving a colleague who just got back from somewhere expensive and didn't pay full price for it. What you may not know is exactly how those rates work, who qualifies, which cruise lines participate, and how to actually book one. This guide answers all of that.
What an interline cruise rate actually is
An interline cruise rate is a heavily discounted cruise fare that cruise lines offer to active and retired employees of airlines, aviation companies, and select logistics employers (FedEx and UPS being the most common). These rates exist because of long-standing commercial relationships between cruise lines and the aviation industry, and they are not available to the general public. They are not advertised. They do not appear on cruise line websites. They require specific verification to book, and they're typically released on a separate inventory schedule from public fares.
Savings range from approximately 20% to 50% off published fares, with the deepest discounts often appearing on shoulder-season sailings, repositioning cruises, and longer voyages. On a $4,000 published cruise, an interline rate might land between $2,200 and $3,200 — sometimes including added perks like onboard credit or beverage packages.
Which cruise lines participate
Most major cruise lines offer interline rates, though terms vary. Lines with active interline programs include Royal Caribbean, Norwegian Cruise Line, Celebrity Cruises, MSC Cruises, Holland America Line, Princess Cruises, Carnival Cruise Line, Seabourn, Silversea, Regent Seven Seas, Oceania Cruises, HX (Hurtigruten Expeditions), Windstar Cruises, and Virgin Voyages. Some river cruise lines, including AMA Waterways, offer interline rates on selected sailings.
Who qualifies
Eligibility is broader than most people assume. Active employees of US and international airlines almost always qualify. Retired airline employees typically retain eligibility, with verification usually requiring a retirement letter or former employee ID. FedEx and UPS employees qualify on many — though not all — cruise lines. Air traffic controllers, aviation maintenance workers, ground handling staff, and other aviation industry employees may also qualify, with rules varying by line.
How to actually book one
This is where most travelers get stuck. Interline rates can't be searched on cruise line websites, and most general travel agents don't have the workflow to find them efficiently. The booking process typically involves: identifying which cruise lines have available interline inventory for your target sailing, verifying your eligibility through the appropriate documentation, and booking through a specialist who handles interline volume regularly. The verification step is the part that trips most people up — every line has slightly different requirements, and the process can stall if you submit the wrong document.
Common mistakes to avoid
Three mistakes come up repeatedly. First, waiting too long: interline inventory often releases 60–90 days before sailing and disappears quickly. Second, comparing the wrong fares: a $1,800 interline cabin and a $1,400 standard inside cabin aren't actually comparable — make sure you're comparing the same room category. Third, assuming all lines accept the same documentation: they don't. A specialist will save you the back-and-forth.
Final thought
If you've worked in aviation or logistics for any meaningful amount of time and you've never booked an interline cruise, you may have left thousands of dollars on the table over the years. There's no charge to verify your eligibility, and no obligation to book if the timing isn't right. Reach out — even just to find out what you're sitting on.