Build an airline from a single turboprop to a global empire. Choose your aircraft, routes, schedules, and fares across 3,100 real-world airports, then watch hub-and-spoke networks emerge from an honest demand model. Deep economic strategy. No hand-holding. Just the numbers.

Public builds
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Counted once we have watched for 90 days (since 21 Oct 2026)
Distinct builds deployed to a game's public (default) Steam branch, as Steam's client network describes them.
Checked within minutes of each Steam change. Observed since 21 Oct 2026.
Source: Steam client network (PICS), App info, public branch. Full methodology
Latest public build
Build 25310132
Update posts
7 postsPosts announcing an update, tagged or not
Posts in a game's official Steam news feed that announce an update: tagged as patch notes by the developer, or plainly about a patch or a released update.
Source: Steam Web API, ISteamNews/GetNewsForApp. Full methodology
Typical gap between builds
Not enough builds yet| Build | Went live | Patch notes |
|---|---|---|
| 25310132 | Load Factor 0.17 to 0.20 |
From Steam’s client network, last checked . Builds before 21 Oct 2026, when we started watching, aren't listed. Patch notes are the developer’s update post from an hour before to a day after the build. Not every build gets one. How we count
| Posted | Update |
|---|---|
| 15 Sept 2026 | Load Factor 0.17 to 0.20 Patch notes |
| 14 Sept 2026 | 0.16.1 — Busy flights fill up, fewer weather cancellations, and a Roadmap Patch notes |
| 10 Sept 2026 | 0.16.0 - Your airline runs its own timetable now Patch notes |
| 7 Sept 2026 | 0.15.1 Patch notes |
| 7 Sept 2026 | Load Factor 0.15.0 Patch notes |
| 6 Sept 2026 |
| 0.14.3 — 6 September 2026 Patch notes |
| 6 Sept 2026 | 0.14.2 — Career Mode, Certifications & Lifetime Stats Patch notes |
Steam keeps no record of past build numbers, so before 21 Oct 2026 a game’s update history comes from its own Steam news: posts tagged as patch notes, and untagged posts that plainly announce a patch or a released update. Older posts are still being read in, most played games first. How we count