When airplanes fly northward/southward, do they still fly even/odd flightlevels?

6 Answers

  • 1 decade ago
    Best Answer

    In the United States, aircraft flying under visual flight rules normally fly at odd thousands plus 500 feet when flying a heading of 000-179 degrees, and even thousands plus 500 feet when flying a heading of 180-359 degrees. So an aircraft flying a heading of 270 degrees (west) under VFR would fly at 4500, 6500, 8500, etc. At least than 3000 feet AGL, the altitude is at pilot's discretion (within the limitations of the regulations).

    Under IFR, the rules are the same, except that the extra 500 feet are omitted. So an eastbound IFR flight might fly at 5000, 7000, 9000, etc.

    Air traffic controllers may assign altitudes that are different from the ones above. The rules above apply when the pilot is selecting his own altitude.

    Other countries sometimes have different rules.

  • 1 decade ago

    Thats right Kat, however, an ATS unit may also establish the levels to be flown on a route heading north. One same route may change course like for example from 359 to 000 to 001, which means it requires a change in altitude. But this is normally tackled with agreements with adjacent FIR's to continue flying at a constant level.

  • 4 years ago

    I haven't flown in many years. I cant afford to fly and besides, I get air sick. You should not have to suffer from flying. The reason you get earaches is because you are getting Aerotitus. The causes of this ear pain are due to the rapid changes in air pressure in the cabin of the plane. The air pocket inside the middle ear expand during takeoff and landing and this stretches the eardrum. Air must enter and escape through the Eustachian tube in the ear to normalize the ear drum. The Eustachian tube sometimes has difficulty keeping up with the rapid changes in air pressure during takeoff and landing. If you have congestion, or allergies you can be more prone to aerotitus. Take a decongestant every 6 hours for 24 hours before and after your flight. This will shrink the swollen membranes in your sinus and ear canal. You can use a pediatric nasal decongestant spray immediately before you board the plane to shrink the nasal membranes and clear the sinus. Chewing gum during the entire flight, not just on take off and landing, will open up the Eustachian tubes and keep them open. There are also ear plugs available that decrease ear pain during flight. About half an hour before landing you can start to use the pediatric decongestant nasal spray every 5 minutes to keep nasal passages open. I hope this helps.

  • 1 decade ago

    Eastbound traffic from 000 to 179 degrees at odd levels.

    Westbound from180 to 359 degrees at even.

    If you heading is within 5 degrees of 000 or 180, the level is chosen at pilots discretion.

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  • Mark
    Lv 6
    1 decade ago

    In controlled US airspace they will fly whatever altitude is assigned.

    The even/odd FL rule applies in UNcontrolled airspace.

    Source(s): www.faa.gov FAR 91.179 a Ask any US pilot.
  • 1 decade ago


    "East is ODD, west is EVEN odder."

    0-179 - odd.

    180-359 - even.

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