Crusing Altitude Regulations    
         
   
FAR 91.179 - IFR Cruising Altitudes WEST
(180-359)
EAST
(0-179)

When at or above FL290 in RVSM (Reduced Vertical Separation Minimum) airspace
and on magnetic course of 180-359 deg, any even flight level at 2,000ft intervals, beginning and including FL300 (such as FL300, FL320, FL340).

When at or above FL290 in RVSM (Reduced Vertical Separation Minimum) airspace and on magnetic course of 0-179 deg, any odd flight level at 2,000ft intervals, beginning and including FL290, (such as FL290, FL331, FL330).

RVSM Ends at FL410. Flights above FL410 must use the Non-RVSM airspace table below.

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FL400
FL380
FL360
FL340
FL320
FL300

FL410
FL390
FL370
FL350
FL330
FL310
FL290
When at or above FL290 in Non- RVSM airspace and on a magnetic course of 180 degrees through 359 degrees, any flight level, at 4,000-foot intervals, beginning at and including flight level 310 (such as flight level 310, 350, or 390).

When at or above FL290 in Non-RVSM airspace and on a magnetic course of zero degrees through 179 degrees, any flight level, at 4,000-foot intervals, beginning at and including flight level 290 (such as flight level 290, 330, or 370).
FL590
FL550
FL510
FL470
FL430
FL390
FL350
FL310
FL570
FL530
FL490
FL450
FL410
FL370
FL330
FL290
When at or above 18,000 feet MSL but below 29,000 and on magnetic course of 180-359 deg, any even flight level (ie 180; 200; 220).

When at or above 18,000 feet MSL but below 29,000 and on magnetic course of 0-179 deg, any odd flight level (ie 190; 210; 230).
FL280
FL260
FL240
FL220
FL200
FL180
FL270
FL250
FL230
FL210
FL190
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When below 18,000 feet MSL and on magnetic course of 180-359 deg, any even thousand foot MSL altidude (ie 4,000; 6,000; 8,000).

When below 18,000 feet MSL and on magnetic course of 0-179 deg, any odd thousand foot MSL altidude (ie 3,000; 5000; 7000).
16,000
14,000
12,000
10,000
8,000
6,000
4,000
17,000
15,000
13,000
11,000
9,000
7,000
5,000
FAR 91.159 - VFR Cruising Altitudes WEST
(180-359)
EAST
(0-179)

When at or above FL290
and on magnetic course of 180-359 deg, any flight level at 4,000 foot intervals, beginning and including FL300, FL340, FL380).

When at or above FL290 and on magnetic course of 0-179 deg, any flight level at 4,000 foot intervals, beginning and including FL320, FL360, FL400).

FL440
FL400
FL360
FL320

FL420
FL380
FL340
FL300
When at or above 18,000 feet MSL to 29,000 (inclusive) and on magnetic course of 180-359 deg, any even flight level +500 feet (ie 185; 205; 225).

When at or above 18,000 feet MSL to 29,000 (inclusive) and on magnetic course of 0-179 deg, any odd flight level +500 feet (ie 195; 215; 235).
FL285
FL265
FL245
FL225
FL205
FL185
FL295
FL275
FL255
FL235
FL215
FL195
When in VFR cruising flight more than 3,000 feet MSL and below 18,000 feet MSL and on magnetic course of 180-359 deg, any even thousand foot MSL altidude +500 feet (ie 4,500; 6500; 8,500).

When in VFR cruising flight more than 3,000 feet MSL and below 18,000 feet MSL and on magnetic course of 0-179 deg, any odd thousand foot MSL altidude + 500 feet (ie 3,500; 5,500; 7,500).
16,500
14,500
12,500
10,500
8,500
6,500
4,500
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17,500
15,500
13,500
11,500
9,500
7,500
5,500
3,500