Keywords: First US Air Mail Flight Phila 1918.jpg Cover flown on the first day of scheduled Air Mail Service in the U S and franked with the first U S Air Mail stamp the 24 Cent Jenny C-3 Cancel AIR MAIL SERVICE - WASH N Y PHILA MAY 15 1918 - FIRST TRIP PHILA Type USPOD CDS w/killer bars <small>Sourrce The Cooper Collection of U S Aero Postal History</small> Transferred from http //en wikipedia org en wikipedia; transferred to Commons by User Rlandmann using http //tools wikimedia de/~magnus/commonshelper php CommonsHelper 2008-07-20 Original uploader was Centpacrr at http //en wikipedia org en wikipedia Released under the GNU Free Documentation License; PD-STAMP <center>License for Postage Stamp</center> PD-USGov <center>License for Image</center> GFDL relicense original upload log page en wikipedia First_US_Air_Mail_Flight_Phila_1918 jpg 2008-07-20 20 30 Centpacrr 843×530× 191062 bytes <nowiki>Cover flown on the first day of scheduled Air Mail Service in the United States May 15 1918 Franked with 24 Cent U S Air Mail stamp C-3 and cancelled with Philadelphia PA First Day CDS <small>The Cooper Collection of U S Aero Postal History<</nowiki> 1918 stamps United States Air Mail Aircraft on stamps of the United States First flight covers 1918 postmarks |