---
title: "SERA.3110 Cruising levels — ANNEX: Rules of the Air, SERA · Avioverse"
description: "The cruising levels at which a flight or a portion of a flight is to be conducted shall be in terms of:"
url: "https://avioverse.aero/regulations/easa/sera/annex-rules-of-the-air/section-3/sera-3110"
---

# SERA.3110 Cruising levels

ANNEX: Rules of the Air · Regulation (EU) No 923/2012 · EAR revision 26 Aug 2025

IR Implementing rule

## SERA.3110 Cruising levels

The cruising levels at which a flight or a portion of a flight is to be conducted shall be in terms of:

(a) flight levels, for flights at or above the lowest usable flight [level](https://avioverse.aero/glossary/easa/level) or, where applicable, above the [transition altitude](https://avioverse.aero/glossary/easa/transition-altitude);

(b) altitudes, for flights below the lowest usable flight level or, where applicable, at or below the transition altitude.

IR · SERA.3110 — Regulation (EU) No 923/2012 · ​Regulation (EU) No 923/2012 · SERA Easy Access Rules · EAR revision 26 Aug 2025

[All rules in SECTION 3 General rules and collision avoidance](https://avioverse.aero/regulations/easa/sera/annex-rules-of-the-air/section-3)

Consolidated from the EASA Easy Access Rules (revision 26 Aug 2025, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.