SITA unveils API to give airports earlier delay alerts

SITA has launched an Advance Flight Delay Notification API that sends early alerts to destination airports when an inbound flight is likely to arrive late, using live departure data and flight-duration logic.

The product addresses a common coordination gap: arrival airports often learn about delays only after schedules change or once aircraft are already en route. That lag can trigger knock-on disruption across gates, ground handling, crew duty limits, and passenger connections.

Pressure on punctuality has increased as traffic volumes rise and schedules run with tighter buffers. Delays also carry a material cost. The International Air Transport Association estimates that air traffic flow management delays in Europe alone cost airlines and passengers €16.1 billion over the past decade.

How it works

The API ingests the latest departure information, applies logic that accounts for expected flight duration, and flags a potential delay. It then sends notifications to the destination airport.

Alerts are delivered as push notifications to arrival-side stakeholders. SITA says the approach helps teams shift from reacting late in the process to making adjustments earlier in the operating cycle.

"Most disruption isn't caused by the delay itself, but by how late it becomes visible to the teams expected to manage it," said Martin Smillie, Senior Vice President, Communications and Data Exchange at SITA.

The notifications are aimed at airport operational teams managing gate allocation, inbound aircraft servicing, and turnarounds. They also support flight operations teams managing crews and onward rotations, as well as airport and airline staff overseeing passenger flows and missed-connection risk.

In practical terms, earlier notice can reduce time spent keeping staff and equipment on standby. It can also limit last-minute gate changes that ripple through a terminal, particularly at constrained hubs where one late inbound aircraft can affect multiple departures in quick succession.

Operational triggers

The API can issue automated alerts when a flight is expected to depart 15 minutes later than its original scheduled time. In operations, that threshold is widely used as an early signal that a flight may not recover its schedule later in the day, depending on route length, air traffic constraints, and turnaround capacity at the destination.

The service also provides real-time updates on delayed or potentially disrupted flights. It is designed for direct use by destination airports, which often rely on multiple data sources to build a live view of inbound movements.

Data exchange remains a core challenge in airport and airline operations, where the same disruption can appear in different formats across airline operations centres, airport operational databases, and ground-handling systems. Automated early warnings reduce the need for repeated status checks and manual coordination, particularly during irregular operations.

Integration and security

The API is delivered through secure, encrypted HTTP connections. Alerts are sent automatically once the logic indicates a delay risk, reducing the need for repeated schedule requests and manual updates.

SITA is offering the Advance Flight Delay Notification API as a subscription service. It sits within the company's broader portfolio of flight information APIs used by airlines and airports to share operational data with partners.

The launch adds to SITA's aviation data products. The company is a long-standing provider of messaging and information exchange services and says its technology supports more than 1,000 airports and more than 19,600 aircraft worldwide.

SITA also says it supports more than 70 governments with border and traveller processing technology. It estimates it carries 45% to 50% of the air transport industry's data exchange, reflecting its historical role in airline communications and airport integration.

SITA has expanded through acquisitions including Materna IPS, ASISTIM, and CCM, and has promoted work beyond aviation in areas such as maritime and rail through initiatives including SmartSea.

Smillie said the product changes the operational model for arrival-side teams. "Across the industry, arrival airports are still forced to react rather than intervene. Advance Flight Delay Notification API shifts that model by giving earlier, reliable signals, so operational decisions are made with time, not under pressure, and the impact on passengers, costs and airline network performance is reduced," he said.