Show frontier airlines revenues show big increase revenues for frontier airline company during the first quarter of 1951 were substantially in creased over figures for the first quarter of 1950 according to donald A duff frontiers vice president of traffic and sales passenger revenues during the first three months to showing an increase of 51 0 over the first quarter of 1950 totals for revenue passenger miles jumped with revenue passenger miles for the first quarter of this year air cargo snowed showed in increases in all three categories it was re ported mail for the first quarter of if 1951 totaled ton miles an in increase crease of 1019 over the same period a year ago express was ton miles up over the first quarter of 1950 while air freight totaled 5 4 ton miles showing an iner increase e ase of over the first quarte of last year during the first quarter of 19 50 frontiers passenger revenue amounted to passenger miles totaled during the same period frontier carried ton miles of mail ton miles of air express and ton miles of air freight the arizona segments duff said were not a part of the frontier system during the first quarter of 1950 this accounts for part of the increases shown however considerably increased passenger and freight traffic were evident in the old segments of the frontier airlines system i |