CAM  1 - Boston-New York - Colonial Air Transport - 200 mi
CAM  2 - Chicago-St Louis - Robertson Aircraft Corp (RAC) - 276 mi
CAM  3 - Chicago-Dallas - National Air Transport (NAT) - 1,078 mi
CAM  4 - Salt Lake City-San Diego - Western Air Express (WAE) - 771 mi
CAM  5 - Salt Lake City-Seattle - Varney Air Lines (VAL) - 1,028 mi
CAM  6 - Newark-Miami discontinued
CAM  7 - Newark-Chicago discontinued
CAM  8 - Seattle-San Diego - Pacific Air Transport - 1,238 mi
CAM  9 - Chicago-St Paul - Northwest Airways - 892 mi
CAM 10 - Chicago-Jacksonville discontinued
CAM 11 - Cleveland-Pittsburgh - Pennsylvania Air Lines - 140 mi
CAM 12 - Cheyenne-Pueblo - WAE - 204 mi
CAM 13 - Salt Lake City-San Diego discontinued
CAM 14 - Washington DC-Detroit discontinued
CAM 15 - Amarillo-Brownsville discontinued
CAM 16 - Cleveland-Louisville - Continental Air Lines - 351 mi
CAM 17 - New York-Chicago - NAT - 736 mi
CAM 18 - Chicago-San Francisco - Boeing Air Transport - 2,030 mi
CAM 19 - New York-Atlanta - (1929) Pitcairn Aviation - 803 mi
                            (1930) Eastern Air Transport (EAT)
CAM 20 - Albany-Cleveland - Colonial Western Airways - 463 mi
CAM 21 - Dallas-Galveston - Texas Air Transport (TAT) - 333 mi
CAM 22 - Dallas-Brownsville - TAT - 547 mi)
CAM 23 - Atlanta-New Orleans - Gulf Coast Airways - 488 mi
CAM 24 - Chicago-Cincinnati - Embry-Riddle Co - 274 mi
CAM 25 - Atlanta-Miami - (1929) Pitcairn Aviation - 777 mi
                         (1930) EAT
CAM 26 - Great Falls-Salt Lake City - National Parks Airways - 509 mi
CAM 27 - Bay City-Chicago - Thompson Aeronautical Corp - 974 mi
CAM 28 - St Louis-Omaha - RAC - 404 mi
CAM 29 - New Orleans-Houston - Gulf Coast Airways - 319 mi
CAM 30 - Chicago-Atlanta - Interstate Air Lines - 810 mi
CAM 31 - Jacksonville-St Petersburg discontinued
CAM 32 - Pasco-Seattle - (1929) VAL* - 449 mi
CAM 33 - Honolulu-Hilo discontinued
CAM 33 - Atlanta-Los Angeles ** - Southern Air Fast Express - 2,375 mi
CAM 34 - New York-Los Angeles ** - Transcontinental & Western - 3,333 mi

         * consolidated with CAM 5 July 1, 1930
         ** operations began Oct 1930

AM  1 - Newark-Oakland - United Air Lines (UAL) - 2720 mi
AM  2 - Newark-Los Angeles - Transcontinental & Western - 2609 mi
AM  3 - Fargo-Seattle - Northwest Airways - 1286 mi
AM  4 - Ft Worth-Los Angeles - American Air Lines (AAL) - 1329 mi
AM  5 - Newark-New Orleans - Eastern Air Lines (EAL) - 1305 mi
AM  6 - Newark-Miami - EAL - 1195 mi
AM  7 - Newark-Chicago - AAL - 794 mi
AM  8 - Chicago-New Orleans - Pacific Seaboard Air Lines* - 1,238 mi
AM  9 - Chicago-Dallas - Braniff Air Lines - 955 mi
AM 10 - Chicago-Jacksonville - EAL - 928 mi
AM 11 - Seattle-San Diego - UAL - 1224 mi
AM 12 - Salt Lake City-Seattle - UAL - 1029 mi
AM 13 - Salt Lake City-San Diego - General Air Transport - 778 mi
AM 14 - Washington-Detroit - Central Air Lines - 457 mi
AM 15 - Amarillo-Brownsville - Long & Harmon** - 1125 mi
AM 16 - Chicago-Pambina - Hanford Tri-State Air Lines (HAL) - 772 mi
AM 17 - Cheyenne-Pueblo - Wyoming Air Service (WAS) - 201 mi
AM 18 - Boston-Newark - AAL - 201 mi
AM 19 - Salt Lake City-Great Falls - National Parks Airways - 517 mi
AM 20 - New Orleans-Houston - Robertson Airplane Service Co - 337 mi
AM 21 - Boston-Cleveland - AA - 612 mi
AM 22 - Cleveland-Nashville - AA - 470 mi
AM 23 - Newark-Ft Worth - AA - 1460 mi
AM 24 - Charleston-Ft Worth - Delta Air Lines - 1087 mi
AM 25 - Washington-Chicago - AA - 679 mi
AM 26 - St Paul-Kansas City - HAL - 902 mi
AM 27 - Boston-Bangor - National Airways - 410 mi
AM 28 - Billings-Cheyenne - WAS - 405 mi
AM 29 - Pueblo-El Paso - Varney Speed Lines - 530 mi
AM 30 - Chicago-Ft Worth - AA - 914 mi
AM 31 - Dayton-St Petersburg - Franklin & Baker*** - 158 mi
AM 32 - Detroit-Milwaukee - Pennsylvania Air Lines - 265 mi
AM 33 - Hawaii - Inter-island Airways - 333 mi

	* became Chicago & Southern Air Lines
	** acquired by Braniff
	*** became National Airlines