SION, Switzerland, June 30, 2026, 21:02 CEST
- The Sion court declared Air Mountain bankrupt, effective May 27, and the company is now in liquidation, according to official documents from the Swiss registry.
- Air Mountain cut over 30 weekly flights. With its pair of eight-seat King Air B200s, that means the Alpine leisure market lost more than 240 one-way seats a week.
- Asset concentration was the problem: ch-aviation said one plane had an extended grounding for maintenance in 2025 and the other has sat parked since November.
- As of the dateline, main Swiss shares on SIX had moved beyond the 17:40 Trading-At-Last window for both blue chips and mid/small caps.
Air Mountain Compagnie d’Aviation SA has shut down after being declared bankrupt, wiping out more than 30 weekly flights from Sion, Saint-Tropez and La Chaux-de-Fonds. The Swiss operator, based at Sion airport, had both planes grounded as of June 29, according to ch-aviation.
The Swiss official gazette reported the company was declared bankrupt by the Sion court on May 27 at 09:00. Its name changed to Air Mountain Compagnie d’Aviation SA en liquidation. The filing posted June 2.
For investors, it’s not about market share at major listed carriers. The concern is counterparty risk tied to small, seasonal lift: a high-fare, eight-seat run can lose much of its summer inventory if one plane goes into maintenance and the backup isn’t available.
| Operating marker | Confirmed data | Investor read-across |
|---|---|---|
| Aircraft in operation base | 2 Beechcraft King Air B200s | 16 seats in total pre-crew restrictions |
| Cancelled schedule | Over 30 weekly flights cut | Over 240 one-way seats lost each week, using an eight-seat count |
| Aircraft build years | 1977 and 1979 | Airframes about 47 to 49 years old |
| Key failure point | One plane grounded for more than three months in 2025 | Maintenance pushed back season launch |
| Backup aircraft | Second plane parked at Teuge since Nov. 12 | Not much spare capacity |
Air Mountain’s summer schedule listed adult return fares between CHF 965 and CHF 1,459 for leisure flights out of Sion or Geneva to Elba, Sardinia, Corsica, and Saint-Tropez. Those prices put the airline firmly in the high-yield niche, but fleet numbers make it clear yield alone couldn’t prop things up when capacity was cut.
| Route block in public timetable | Season shown | Adult return fare |
|---|---|---|
| Sion-Elba | May 9 to June 27 | CHF 965 |
| Sion-Alghero | May 31 through Sept. 27 | CHF 1,065 |
| Sion-Calvi | May 2 to Sept. 30 | CHF 965 |
| Sion-Figari | May 10 through Sept. 27 | CHF 1,065 |
| Geneva/Sion-Saint-Tropez | May 14 to Sept. 14 | CHF 1,459 |
Director Raphaël Délèze told Swiss broadcaster RTS, according to ch-aviation, that Air Mountain may appeal and expects to get flying again. He called the timing bad with the summer season just starting and tickets already sold.
ch-aviation reported the company’s finances got worse in 2025 when aircraft HB-GJM was stuck on the ground for over three months with expensive repairs. HB-GJM flew in May up to the bankruptcy ruling. Another plane, HB-GJI, has stayed parked in the Netherlands since Nov. 12.
Air Mountain was dropped from the list of Swiss airplane AOC holders by the Federal Office of Civil Aviation on June 10, according to ch-aviation, which said the regulator pulled the company’s AOC that day. The list as of now continues to show Swiss operators like EasyJet Switzerland, Edelweiss Air, Helvetic Airways and Swiss International Air Lines.
VT Vacances said several hundred customers were hit after using Air Mountain out of La Chaux-de-Fonds. Co-director Stéphane Jayet said 95% of La Chaux-de-Fonds bookings were made with Swiss Travel Federation agencies, so those clients would get “follow-up, support and proposals” for their trips. aboutTravel
Getting new planes isn’t only about price, Jayet told RFJ. He said flights from Les Eplatures need certain certifications depending on the aircraft, and that “the requests are more complicated.” He added demand is high, with a 90% load factor. RFJ
RFJ reported VT Vacances had been running four flights a week from La Chaux-de-Fonds to Corsica and Sardinia, using eight-seat planes. The tour operator gave travelers a choice of switching to departures from Bern, Basel or Geneva with financial compensation, or taking a full refund if they didn’t accept the change.
The change moves costs off Air Mountain’s books and onto tour operators, airports and providers. RFJ said Les Eplatures airport missed out on landing fees, but airport director Raphaël Boichat told the outlet the loss was tough to pin down so far.
