On March 31, 1931, the Compagnie Générale Aéropostale was put into liquidation. The French State decides to create the Central Company for the Exploitation of Air Lines (SCELA); it brings together Air Orient, CIDNA, Farman and Air Union. On May 31, 1933, Société Centrale bought the assets of Aéropostale. On October 7, 1933, SCELA became Air France. From 1933 to 1939, the activity of Aéropostale will be continued by Air France which will operate, among other things, the domestic network of South America...

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At the same time, the French airline Air Bleu was created in 1935 by Beppo di Massimi on the initiative of Didier Daurat, appointed director of operations. The aim is to develop an air mail transport network in mainland France that complements Air France's overseas and international network.

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On July 10, 1935, the company inaugurated with six planes a daily postal service of four lines:

• Le Bourget-Arras-Lille,

• Le Bourget-Rouen-Le Havre,

• Le Bourget-Towers-Poitiers-Angouleme-Bordeaux,

• Le Bourget-Nancy-Strasbourg,

 

On July 25 additional lines are created

• Le Bourget-Le Mans-Angers-Nantes-The Baule,

• Le Bourget-Bourges-Limoges-Toulouse.

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In 1937, Air Bleu went through financial problems. After negotiation with the State, the latter bailed out the company on July 7, 1937 in exchange for 52% of the shares, subject to the entry of Air France into the capital up to 24% and the abolition of the tax. Activity resumed and new lines were opened in July. On May 10, 1939 the first French night postal line, Le Bourget-Bordeaux-Paul, was commissioned. La Lufthansa  was already providing Paris every night-Berlin-Paris. From September 3, 1939, Air Bleu was integrated into Air France.