Wamos Air,  Madrid, Spain, founded 2014  by renaming from Pullmantour Air.     - #1a,     #2:

Wardair, Mississauga (Edmonton), Canada, 1952-1990,  merged into Canadian Airlines(q.v.).
  -   #1-5/89    and  #1a-7/89:

Wataniya Airways, Kuwait, 2009 - 2011.    -   #1:

Webjet, Rio de Janeiro, Brazil, founded 2005.  -     #2,        #5/#5a(larger maker logo):
 
West Airlines, Chongqing, China, founded 2007.   -  #3,   #4,          #5:

Westjet Airlines, Calgary, Canada, founded 1995.         -   #1:
                            
White Airways, Lisbon, Portugal, founded 2005.     #1 and  #2:

White Eagle Aviation, Warzaw, Poland,  1992 - 2010.     -#1:

Wideroe, Bodoe, Norway, founded 1934.             - #1,                    #8,                     #10:

-                    #3a,                                                        #5,                                #15:

Wind Jet, Catania, Sicilia, Italy, 2003-2012 as Successor of Air Sicilia.    -  #2,     #1:

Wings Air, Manado, Indonesia, founded 2003 (subsidary of Lion Air - q.v.):

WIZZ Air, Budapest, Hungary, founded 2004. 
- #1(plain gussets)/#4(diff paper)/#2(SzR in gusset)/#3(ZsT4 in gusset),      #5,         #7:

WORLD Airways, Peachtree City, Georgia, USA, 1948 - 2014,
Home Airport: Oakland, CA., USA.         -   #1:

Worldways, Toronto, Canada, 1973-1990.  -    #1,                       #2:

WOW Air, Reykjavik, Iceland,  2012 -2019.        -  #1,         #2      and             #3: