The first Balair (1925–1931)

Basler Aviation AG - Balair was founded by Balz Zimmermann in 1925 in Basel.^[3] The name Balair is a reference to the French name of Basel: Bâle. The first route was from Basel to Freiburg and Mannheim. In 1929, Balair grew at Basel Airport, the largest airport in Switzerland, with direct flights to Zürich, Geneva, Lyon, Karlsruhe and Frankfurt. In response to the Great Depression, Balair (based in Basel) and Ad Astra Aero (based in Zürich) merged on 1 January 1931 to form Swissair, headquartered in Zürich. Up to that point, Balair had carried over 18,000 passengers, 320 tons of cargo, and 143 tons of mail. The company only flew in the summer and was mainly financed by federal subsidies and mail transportation for the Swiss post office.

The second Balair (1953–1993)

On 5 October 1952, the Basel electorate voted for the creation of a limited company. Soon, the second Balair was founded in January 1953, with Hans Peter Tschudin elected as the first president. In its early years, Balair was active in flight training, maintenance, and handling Swissair aircraft at Basel-Mulhouse Airport. Balair entered the charter business by acquiring two Vickers Vikings in June 1957. In 1959, Swissair acquired a 40% stake in Balair. Two Swissair DC-4s were added to the fleet and later the DC-6 came into service in 1961.

During the Biafran airlift (1967–71), chartered aircraft, including C-97 Stratocruisers, delivered humanitarian aid to a remote Biafran airstrip in eastern Nigeria.

The airline's first jet aircraft was the Convair 990 Coronado and then the McDonnell Douglas DC-9-32 entered service followed by a Douglas DC-8-63CF which it flew on routes to Colombo, Bangkok and Rio de Janeiro.

In 1979, Balair added a McDonnell Douglas DC-10-30 to its fleet. By 1982, Balair became an all-jet airline and by 1986, the Airbus A310-300 and MD-82 were the mainstay of the fleet. Later, Swissair operated charter flights using the Balair name. By this time, Swissair was a majority owner.

BalairCTA (1993–1995)

In 1993, Balair and CTA – Compagnie de Transport Aérien were merged and formed a new airline named BalairCTA.^[4] For political reasons, the registered office of the company was in Geneva and the accounting department in Basel. The operational base was moved to Zürich. Despite restructuring and mass layoffs, the Swissair charter business was unprofitable and operations ended in 1995. Short-haul operations were transferred to Crossair and long-haul operations to Swissair.

The new Balair (1997–2001)

In 1997, Swissair's charter business was outsourced again, and on 1 November 1997, BalairCTA resumed operations as a subsidiary of Swissair, reverting to the Balair name. On short and medium-haul routes, two Boeing 757-200s were operated exclusively for tour operator Hotelplan and its subsidiaries ESCO-Reise and M-Travel. The lessee was also Hotelplan. Balair also had two Boeing 767-300ERs for long-haul operations. However, the new Balair was affected by the failure of Swissair. On 5 October 2001, the last Balair flight landed in Zürich. The Boeing 767s were returned to the lessor.

Belair (2001–2017)

After consulting Migros (its parent company), Hotelplan founded a new charter airline named Belair and transferred their Boeing 757s to it. It entered into the commercial register on 16 October 2001. The minor name change meant it was possible to repaint the two Migros-owned Boeing 757s with very little effort. 120 Balair employees were employed by the new company.

The first Belair commercial flight took place on 3 November 2001, departing from Zürich. Flights were mainly to Mediterranean resorts. Besides the two Boeing 757s it operated, Belair also leased a Boeing 767-300ER for long-haul operations.

As part of the partnership with REGA (Swiss Air Rescue), a 757 was redesigned by Belair to be used as a rescue aircraft for repatriations in case of disasters.

Part of Air Berlin

Air Berlin acquired 49% of Belair in 2007 and fully owned it after October 2009. This increased Air Berlin's presence in Switzerland and provided Migros customers access to more flights. While Air Berlin owned Belair, Belair was managed from Berlin and Air Berlin only published consolidated financial statements. Air Berlin Switzerland (Air Berlin pilots), the CHS Switzerland (Air Berlin flight attendants), and Belair were combined to form the new company Belair on 1 January 2010.

Belair flew from Zürich, Basel, and Geneva to Mediterranean destinations and the Canary Islands. The aircraft used to have Belair signage combined with Air Berlin's corporate design, but then wore Air Berlin's livery. Due to bilateral traffic rights, certain routes to non-EU countries continued to use Belair's IATA code, 4T.