As a change, I’m including all U.S. airlines for which I have traffic figures. A question to readers: Do you prefer this more complete table? Or would you prefer that we focus on what are commonly considered the major mainline carriers: Alaska, American, Delta, JetBlue, Southwest, United Continental and US Airways?

Traffic is in thousands of revenue passenger miles
Capacity is in thousands of available seat miles
Load factor is percentage of seats filled with paying passengers.

Traffic 2011 2010 Change
Alaska 2,105,000 1,957,000 7.6%
Allegiant 439,408 472,141 -6.9%
American 11,464,063 11,507,879 -0.4%
American Eagle 855,091 776,014 10.2%
Delta 16,652,722 16,641,543 0.1%
Frontier 1,234,053 1,213,869 1.7%
Great Lakes 15,158 13,817 9.7%
Hawaiian 933,023 840,092 11.1%
Horizon 191,000 234,000 -18.4%
JetBlue 2,900,026 2,742,319 5.8%
Republic minus Frontier 742,584 786,111 -5.5%
SkyWest 2,681,927 1,748,653 53.4%
Southwest 9,346,553 8,997,354 3.9%
United 17,154,270 17,645,096 -2.8%
US Airways 5,597,878 5,531,894 1.2%
Total 72,312,756 71,107,782 1.7%
Capacity 2011 2010 Change
Alaska 2,385,000 2,263,000 5.4%
Allegiant 476,227 525,399 -9.4%
American 13,445,622 13,607,271 -1.2%
American Eagle 1,140,824 1,061,685 7.5%
Delta 18,972,125 19,027,406 -0.3%
Frontier 1,371,482 1,383,669 -0.9%
Great Lakes 32,364 33,682 -3.9%
Hawaiian 1,084,325 954,489 13.6%
Horizon 230,000 286,000 -19.6%
JetBlue 3,320,360 3,174,149 4.6%
Republic minus Frontier 983,886 1,009,113 -2.5%
SkyWest 3,318,753 2,169,195 53.0%
Southwest 11,321,267 10,868,865 4.2%
United 19,816,384 20,177,515 -1.8%
US Airways 6,408,519 6,491,656 -1.3%
Total 84,307,138 83,033,094 1.5%
Load factors 2011 2010 Change
Alaska 88.3% 86.5% 1.8
Allegiant 92.3% 89.9% 2.4
American 85.3% 84.6% 0.7
American Eagle 75.0% 73.1% 1.9
Delta 87.8% 87.5% 0.3
Frontier 90.0% 87.7% 2.3
Great Lakes 46.8% 41.0% 5.8
Hawaiian 86.0% 88.0% -2.0
Horizon 83.0% 81.8% 1.2
JetBlue 87.3% 86.4% 0.9
Republic minus Frontier 75.5% 77.9% -2.4
SkyWest 80.8% 80.6% 0.2
Southwest 82.6% 82.8% -0.2
United 86.6% 87.4% -0.9
US Airways 87.4% 85.2% 2.1
Total 85.8% 85.6% 0.1

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