वेट लीज़ (Wet Lease)

What Is a Wet Lease?

A wet lease is a leasing arrangement in which one airline (the lessor) provides another airline (the lessee) with an aircraft together with its flight crew, cabin crew, maintenance support, and hull insurance. The lessor's crew operates the aircraft under the lessee's flight numbers and IATA codes, and the lessee takes commercial responsibility for the flights — selling tickets, setting schedules, and handling passengers.

The term contrasts with a dry lease, in which only the aircraft is provided without crew or maintenance. The mnemonic is that a wet lease includes the "fluid" elements — crew and oil — while a dry lease is just the airframe.

How It Works in Practice

Wet leases are governed by ACMI agreements (Aircraft, Crew, Maintenance, Insurance), and the lessor retains operational control of the crew while the lessee directs the commercial operation:

• ACMI rate: Lessees pay a block-hour rate covering the four ACMI components. Fuel, airport fees, and handling are typically paid separately by the lessee.
• Regulatory oversight: The aircraft operates under the lessor's Air Operator Certificate (AOC) in most jurisdictions, although the lessee's marketing codes appear on tickets.
• Duration: Wet leases are usually short-term (weeks to months) — used to cover peak seasons, fleet grounding, or capacity shortfalls.
• Crew uniforms: Depending on the contract, crew may wear the lessee's uniform or retain the lessor's livery, which can confuse passengers about which airline is operating.

Industry Examples

• Air Atlanta Icelandic / Hi Fly: Specialist ACMI carriers that wet-lease wide-body aircraft to airlines facing capacity crunches or grounded fleets worldwide.
• Ryanair and Lauda: Ryanair wet-leased capacity from its subsidiary Lauda during early expansion phases in Austria and Germany.
• Post-Boeing 737 MAX grounding (2019): Airlines with MAX fleets grounded (Southwest, Norwegian, Lion Air) wet-leased capacity from other carriers to maintain schedules while awaiting MAX return-to-service.
• Summer peak operations: European charter and low-cost carriers regularly wet-lease additional aircraft for summer peaks, returning them before winter schedules shrink.

Impact on Travelers

Passengers on wet-leased flights may be surprised to board an aircraft in a different livery than expected, or find crew who appear unfamiliar with the lessee's service standards. In rare cases — particularly if the wet lease triggers a codeshare disclosure requirement — the operating carrier must be clearly disclosed at booking under consumer protection regulations in the EU (EU261) and the United States (DOT rules). Travelers with aircraft-type or airline-specific preferences should check the operating carrier field in their booking. See also low-cost carrier and IATA code.