VAAC Toulouse issues RED ash alerts for Mount Etna—French airlines reroute southern corridors

The Toulouse Volcanic Ash Advisory Centre (VAAC) elevated Mount Etna’s aviation colour code to RED early on 27 September 2026 after satellite imagery confirmed a thin but persistent ash plume up to FL120 drifting southwest. Although the eruption is centred in Sicily, Etna sits in one of Europe’s busiest flight information regions (FIRs) and the ash cloud’s projected path crosses airway UM728, routinely used by services linking Marseille, Nice and Lyon with Malta and Egypt. French carriers Air France and Transavia have already filed avoidance routings, adding up to 25 minutes’ block time on certain Mediterranean sectors. Low-cost carrier easyJet cancelled its lunchtime Catania-Lyon rotation, citing crew-duty constraints after the reroute. The Direction Générale de l’Aviation Civile (DGAC) has not closed any French airports, but a NOTAM now requires flights heading south-east to carry an additional 30 minutes of contingency fuel in case altitude changes are needed. Business-aviation operators based at Le Bourget report that several corporate jets bound for Tunisia and Morocco have opted for Spanish airspace to skirt the affected area, increasing ATC congestion over Barcelona. Travel-risk consultants say the incident underlines why mobility programmes should include volcanic-ash clauses in insurance and ticketing policies—even a moderate eruption can ripple into France’s air-traffic flows within hours. The VAAC will reassess the plume every six hours; if the drift persists, Marseille Flight Information Region could impose altitude caps that would squeeze capacity during Monday’s morning peak. Employers with time-critical travel should monitor carrier alerts and consider rail alternatives for intra-European hops over the next 24-36 hours.