The International Air Transport Association (IATA) has published the December 2025 edition of its Global Outlook for Air Transport in 2026, the trade body's forward assessment of airline industry performance for the coming year.

IATA, the association representing some 300 airlines and the bulk of global scheduled traffic, issues its industry outlook twice a year. The December edition consolidates carrier-level data on traffic, capacity, yields and profitability into a single forecast that airlines, lessors, manufacturers and financiers use as a planning baseline.

What does this change for operators?

For network planners and fleet strategists, the outlook functions as a reference point rather than a directive. Carriers typically benchmark their own capacity and yield assumptions against the association's aggregates when sizing schedules and negotiating lease rates for the following summer and winter seasons.

The forecast arrives at a moment when the industry continues to weigh demand growth against persistent supply-side constraints. Aircraft delivery backlogs at Airbus and Boeing remain elevated, and engine shop-visit queues continue to restrict available seat capacity, factors that any 2026 outlook must address.

Verification against delivery records

As with any manufacturer-adjacent forecast, Flightdeck Report treats the outlook's capacity and fleet assumptions as data to be checked against actual delivery and backlog records. The association's traffic projections have historically tracked closer to realized outcomes than its profitability estimates, which have been revised repeatedly across successive editions.

Readers should distinguish what the December document reports as realized 2025 results from what it projects for 2026. The former rest on carrier filings; the latter depend on assumptions about fuel prices, delivery rates and macroeconomic conditions that remain outside the industry's control.

Flightdeck Report will provide detailed analysis of the outlook's figures for traffic, capacity, passenger yields, cargo and net profitability as the full dataset is reviewed against carrier disclosures and OEM delivery records.