▁on ▁June ▁ 1 , ▁ 1 9 5 7 ▁on ▁a ▁Trans ▁World ▁Airlines ▁( T WA ) ▁flight ▁from ▁New ▁York ▁to ▁London ▁and ▁Frankfurt . ▁T WA ▁called ▁their ▁L - 1 6 4 9 s ▁" J et stream s " ▁and ▁fle w ▁them ▁on ▁longer ▁domestic ▁routes ▁and ▁on ▁fl ights ▁from ▁New ▁York ▁to ▁Europe ▁and ▁beyond . ▁In ▁July ▁ 1 9 5 8 ▁T WA ▁scheduled ▁ 6 0 ▁fl ights ▁a ▁week ▁from ▁Europe ▁to ▁New ▁York ; ▁ 3 0 ▁were ▁L - 1 6 4 9 s , ▁including ▁seven ▁non st ops ▁a ▁week ▁from ▁Paris , ▁five ▁from ▁London , ▁four ▁from ▁Frankfurt , ▁two ▁each ▁from ▁Madrid , ▁Lis bon ▁and ▁Gene va , ▁one ▁from ▁Zur ich ▁and ▁one ▁from ▁Rome . ▁Three ▁ 1 6 4 9 s ▁a ▁week ▁fle w ▁the ▁Pol ar ▁route ▁Europe ▁to ▁California , ▁sometimes ▁non stop . ▁ ▁Bo eing ▁ 7 0 7 s ▁replaced ▁the ▁last ▁T WA ▁trans at l antic ▁passenger ▁L - 1 6 4 9 ▁in ▁October ▁ 1 9 6 1 ; ▁ 7 0 7 s ▁and ▁Con v air ▁ 8 8 0 s ▁disp la ced ▁them ▁from ▁domestic ▁scheduled ▁fl ights ▁in ▁December ▁ 1 9 6 2 . ▁In ▁the ▁early ▁ 1 9 6 0 s ▁Lock he ed ▁converted ▁twelve ▁T WA ▁L 1 6 4 9 s ▁to ▁fre igh ters ▁that ▁carried ▁cargo