What is the optimum cruising altitude for a 747?

what is the optimum cruising altitude with respect to fuel economy to get me the furthest from my starting location.
if possible, can you tell me the same for
A340-300
A330-200
CRJ-200
Mooney Bravo
Learjet 45
De Havilland 6
CRJ-700
Beech King Air 350
Beech Baron 58
Boeing 747-400 (original Question)
737-800
ATR-72-500
A321
A320
A319

5 thoughts on “What is the optimum cruising altitude for a 747?

  1. hellboy

    Boeing 747-400: Approximately 39,000 feet or 12 kilometers.
    A340-300: cruising altitude over the atlantic 45,000 feet
    A330-200: 36,000 ft

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  2. Peter J

    Depends on the weight.

    They generally increase the altitude as the weight decreases.

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  3. ANITA

    For the Boeing 747 service ceiling about 45,000 ft (13,715km). Range about 6,500 miles (10,460 km). With full fuel on board 42,833 gallons (194,715 liters)

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