---
title: "Building Real-Time Flight Status: When Seconds Matter"
description: "Building real-time flight status tracking — data source reliability, update frequency, and the notification pipeline from gate change to traveler's phone."
canonical: https://nowah.xyz/blog/launching-real-time-flight-status-seconds-matter
lastModified: "2026-08-07T08:24:30.523Z"
---

# Building Real-Time Flight Status: When Seconds Matter

Building real-time flight status tracking — data source reliability, update frequency, and the notification pipeline from gate change to traveler's phone.

A gate change notification arrived three minutes before the airport display updated. The traveler was at the old gate, checked her phone, saw our notification, and walked to the new gate while other passengers were still waiting at the wrong one. She told us later it was the moment she decided to use Nowah for every trip.

Real-time flight status is one of those features that sounds simple but involves a cascade of technical decisions about data freshness, notification latency, and the acceptable rate of false alerts.

## The status change pipeline

![Illustration for this section](https://pics.nowah.xyz/website-media/launch-028-img-1.webp)

Flight status data flows through a multi-stage pipeline. Background workers poll for status updates on all active bookings at configurable intervals. When a poll returns data that differs from the last known status, a diff detection step identifies what changed: gate, departure time, arrival time, or overall status.

The change is classified by type and severity. A gate change is high priority and time-sensitive. A 10-minute delay is medium priority. A cancellation is critical. Each classification determines the notification channel and urgency.

The classified change enters the notification queue, where it follows the same preference-respecting pipeline as all other notifications. The traveler's quiet hours, [notification preferences](/blog/notification-preferences-done-right), and channel selections are all checked before dispatch.

Our delivery target is under 60 seconds from when we detect a status change to when it appears on the traveler's phone. This budget is tight but achievable because most of the latency is in the polling interval, not the processing pipeline. We tune the polling interval based on flight proximity: flights within six hours get polled more frequently than flights that are days away.

## Handling conflicting data

Different data sources sometimes disagree about a flight's status. One source might show a gate change while another still shows the original gate. One might report a 30-minute delay while another shows on-time.

We handle conflicts by weighting sources by historical reliability and recency. The most recent update from the most reliable source wins, but we do not immediately dispatch a notification on a single conflicting report. We wait for a brief confirmation window, typically 30 to 60 seconds, to see if the conflict resolves. If it does not, we go with the most authoritative source and note the uncertainty if appropriate.

## False alert prevention

![Supporting diagram](https://pics.nowah.xyz/website-media/launch-028-img-2.webp)

A wrong gate change notification erodes trust faster than no notification at all. If a traveler walks to Gate B42 based on our notification and then discovers the flight is actually at Gate B38, they will never fully trust our status updates again.

Our false alert rate must stay below 1 percent. We achieve this through the confirmation window, source reliability weighting, and a sanity check layer that catches obviously impossible updates, like a gate change to a gate that does not exist at the airport, or a delay that would push the departure past midnight for a morning flight.

Status updates that pass all checks are dispatched with confidence. Updates that pass most checks but have some ambiguity are dispatched with appropriate hedging: "Gate may have changed to B42 - confirm at the airport display." This honesty about uncertainty preserves trust more effectively than false confidence.

Real-time flight status is a feature that delivers value through reliability, not through feature richness. The traveler does not need a beautiful interface for status updates. They need accurate, timely information that they can act on. Every engineering decision in this system optimizes for accuracy and speed above everything else.

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