LAB Lloyd Aereo Boliviano, Cochabamba, Bolivia, 1925- 2006.   -   #1,    #2,      #3::

-      #4:

LACSA Lineas Aereas Costarricenses, San José, Costa Rica,
founded 1945 -  since 1999 associated in TACA alliance.    -   #3:

LADE Lineas Aereas del Estado, Buenos Aires, Argentina, founded 1944.
    -                #2(W16,4cm),                                   #2A(W14cm, thicker plastic):

LADECO - Linea Aérea Del Cobre, Santiago de Chile, 1958-1996.     -   #2:

LAKER Airways, UK, 1966-1982.   -  #2/#3(diff size, maker SkyBag-3 in right gusset):

LAM -Linhas Aereas de Mozambique, Maputo, founded  1980 by renaming from DETA *1934.
-            #3,                                                #2,                               #4,                #9:

LAN Chile, Santiago, founded 1929.   -       #13,       #7,              #12,                #8:

-      #4(glossy)/#1(normal paper),            #2:

LAN Peru, Lima, Peru, founded 1998.    -   #1:

LAOAG International Airlines, Laoag, Philippines, 1995-2006.     -    #1:
     
LAO Aviation, Vientiane, founded 1976 - renamed to Lao Airlines 2004.
  -     #3,                          #1,                         #11,                                        #12:

   -      #4,                                   #5,                                       #10:

Lao Central Airlines, Vientiane, Laos, 2010-2014.     - 1:

Lao Skyway, Vientiane, Laos, founded 2002.     -   #1,                  #3:

LAP, Asuncion, Paraguay, 1963-1994.     - #4:

Laser Linea Aerea, Caracas, Venzuela, founded 1993.    - #2b:

LATAM, Santiago de Chile, founded 2010 by merger of LAN and TAM, brand launched 2016.
     -       #1(flatbase),                               #3(sealed base):

Lauda Air, Vienna, Austria.  1979 -2004 sold to Austrian, brand kept until 2013.
-     #9(no clip),                          #1,                              #7,                                          #3:

Lauda Air Italia, Milan, Italy, 1996-2007.      -  #1:

Laudamotion, Vienna, Austria, founded 2016.   -  #1(front and rear):

LC Perú,  Lima,  founded 2011 by renaming from LC Busre, ceased 2019.        -  #1:

LEVEL, Barcelona, Spain, founded 2017.    -   #1:

LIAT (Leeward Islands Air Transport), St. George, Antigua and Barbuda, founded 1956.

Libyan Airlines, Tripoli, 2010 renamed from Libyan. Arab Airlines.  -  #1:

Libyan Arab Airlines, Tripoli, 1965-2010 renamed to Libyan Airlines.
-          #6,                                         #5,                                   #2,                            #1:

Lider Aviacao, Belo Horizonte, Brazil, founded 1958.   -   #1:

Lina Congo, Brazzaville, Rep. of Congo, 1961/1965 - 2005.   -  #1:

Linjeflyg, Stockholm, Sweden, 1957-1992  integrated into SAS.  -   #5,     #2:

Lion Air, Jakarta, Indonesia, founded 1999, (owns 100% of Wings Air -q.v.).
-                  #4,                      #5,                 #6                         and                 #1:

-            #8,                                             #9,                                             #10::

Lithuanian Airlines, Vilnius, 1991- Jan. 2009.   -   #1,               #2,                   #4:

Livingston Energy Flight, Milano, Italy,  2003-2010.  -    #4
  Name revived under 2012 launched Livingston Compagnia Aerea, ceased 2014.   -   #1:
 
Loftleidir Icelandic, Reykjavik, 1944-1979 merged with Flugfelag to Icelandair(q.v.).     -   #2:

London City Airways, UK, founded 1988 by renaming from Eurocity Express(q.v.), ceased and reintegrated 1990   into BMI (q.v.).    - #1:

Loong Air, Hangzhou, China, founded 2013.    -    #1,         #3,                #6,                 #7:

LOT, Warsaw, Poland,  founded 1929.            
-   #3,       #4b(normal-)/#21(high glossy- paper),         #10,        #8-normal/#11-glossy paper,
and w/o pics further variations in diff stickers and paper qualities:  

   -   #34,                           #25,                 27/28(normal/glossy paper),                     #13:                   

-                #31,                                  #35,                              #38(flat base)/#45(pointed base):

Lotus Air, Cairo, Egypt, 1997 - 2011.     -    #4/#9(diff maker),          #2,              #7:

LTE, Palma de M., Spain, 1987-2008(interrupted 201-2005 renamed as Volar, q.v.).  
     #1,                       #2(normal paper)/#3(glossy paper),             and        #4:

LTU-LTS, Munich, Germany, 1988-1997.              -    #26,                   #27:

LTU, Düsseldorf, Germany, 1955-2009 integrated into Air Berlin.
-      #1/#19(w lateral clip),          #8/#9(diff maker logo),                        #23:

  -    #4/#4a/#13/#18/#20/#28/#28a/30(all small variations),     #15pointed base,         #7:

-                     #3,                                                               #2:

Lucky Air, Kunming, Yunnan Prov., China, founded 2006.   -  #6(rear plain),  #8rear(front as #6):

Lübeck Air, Lübeck, Germany, founded 2016.  -   #1:

LUFTHANSA, Cologne, Germany, founded 1955.
white/blue bags: #12,    #32(w dates),   #5/#10/#33(diff maker),  brown bags #1/#15/#20 (diff base):


-   #2,             #29/30(diff base),    light grey bags #3/#4/#18(diff paper and base),         #6:

-       #37,                blue bags  #19/#24(diff base print),                        #7,                    #8:      

#34(normal)/#35(glossy paper),  #42(diff. supplier). Pointy base #44, #46(normal)/#47(glossy):

Luxair, Sandweiler, Luxemburg, founded 1948.
#5/#8/#3(different makers in gussets),          #6,             #1/#9(diff maker),             #10:

-            #11: