World War I aviator Carbot attempts to establish a commercial airline after the war, for the purpose of delivering the mail to the outermost regions of France.
| Actor | Role |
|---|---|
 Georges MarchalJean Fabien | Jean Fabien |
 Pierre FresnayCarbot | Carbot |
 André BervilTriolet | Triolet |
 Félix OudartGarandoux | Garandoux |
 Janine CrispinMaryse | Maryse |
 Germaine MichelMiss Adeline | Miss Adeline |
| AAbel JacquinDarbouin | Darbouin |
 Clément ThierryDidier Fusain | Didier Fusain |
| PPaul AzaïsMorel | Morel |
 Jacques TarrideMacherel | Macherel |
 Nina MyralMrs. Viard | Mrs. Viard |
| AAndré DarnayArmezac | Armezac |
 Pierre CressoyCharlier | Charlier |
 Jean GavenBelfort | Belfort |
| VVerletGérin, aviator | Gérin, aviator |
 Jean VinciFaivret | Faivret |
 Émile GenevoisContact | Contact |
 Manuel GaryGoupil | Goupil |
| DDe AlmeydaSpanish captain | Spanish captain |
| AArsenio FreignacSpanish lieutenant | Spanish lieutenant |
| SSaint-LoupMercier | Mercier |
 Robert ArnouxVuillemin | Vuillemin |
| SSuzanne DehellyMiss Françoise | Miss Françoise |
 Raoul Curet(uncredited) | (uncredited) |
| AAlfred GoulinAviator (uncredited) | Aviator (uncredited) |
| CClaude Larry(uncredited) | (uncredited) |
 Serge Lhorca(uncredited) | (uncredited) |
 Jean-Pierre Mocky(uncredited) | (uncredited) |
| JJean SylvainPhotographer (uncredited) | Photographer (uncredited) |