BABOO, Geneva, Switzerland, 2003-2011.   - #1:

Badr Airlines, Khartoum, Sudan, founded 2004.   -    #3:

Bahrain Air, Manama, Bahrain, 2007-2013.  -  #1:

Balair, Geneva, Switzerland, 1953-1993. Ancessor of BalairCTA (q.v.).
-      #1,                                 #6,                                    #2,                                      #3:

BALAIR CTA, Geneva, Switzerland, 1993- 2001 Ancessor of Belair(q.v.).   -    #1,     #3:

Bali Air, Jakarta, Indonesia, 1973 - 2006.   -  #1:

Balkan Bulgarian Airlines, 1947-2002. Ancessor of Bulgaria Air(q.v.).  -  #10,    #7,   #1,    #4:

-          #3,                                           #2,                                      #8,                    #15:

Bamboo Airways, Hanoi, Vietnam, founded 2017, maiden flight 2019. 
-         #1,                    #2(lighter colors, diff. maker),                       #3:

Bangkok Airways, Thailand, founded 1968.
Elder large size bags in 18cm width #3(plastic)   and         #1(paper):

Modern slim line paper bags in average width 23,8 x 12,4 cm;
   -   #5,                                   #7,                               #8:

      -             #6,                                           #2/#4 (diff. cut),                         #18::

  -        #9,                                                  #10/#10a,                                     #11:

Bassaka Air, Phnom Penh, Cambodia, founded 2014.     -  #2(front and rear):

BATAVIA Air, Jakarta, Indonesia, 2002 - Jan 2013.    -      #1,          #2,               #4:

BEA - Birmingham European Airways, UK, 1989-1992.    #2:

BEA - British European Airways, London, UK, 1946 - 1974 merged into British Airways. 
-     #3,                                   #5:

Beijing Capital Airlines, Beijing, P.R.China, founded 2010.   -   #2     and     #4:

Belair, Switzerland, founded 2001. Successor of BalairCTA (q.v.), since 2009 subsidary of Air Berlin,
ceased 2017.          -    #1,                               #2,                                         #3:

Belavia Belarusian Airlines, Minsk, Belarus, founded 1996.    - #2,              #3A/#3:

Bellview Airlines, Lagos, Nigeria, 1992-2009.  - #1

BerLine, Berlin, Germany, 1991-1994.    - #1:

BESTFLY Cabo Verde -  Praia, Cape Verde, founded 2021.
qv: TICV.
2015 founded as Binter CV,  2019 renamed as TICV, 2021 sold to Angolan airline
BestFly worldwide. As of June 23 their 3 aircrafts are in BestFly livery, all other
remains TICV branded.   IATA-code 3B, ICAO-Code BCV and callsign Morabeza
are still valid since 2015.

BH Air - Balkan Holiday Airlines, Sofia, Bulgaria, founded 2002. -  #1,  #2,  #7   and   #6:

Bhutan Airlines, Thimphu, Bhutan, founded 2011.    -  #2:

BIA - British Island Airways, Crawley, UK, 1982 - 1991.  Successor of BUIA.  #1:

BIMAN Bangladesh Airlines, Dhaka, founded 1972.
  #3                    and                             #9/#11/#11a(diff print color and paper):

Binter Canarias, Telde, Gran Canaria, Spain, founded 1989.
-           #5,                     #8(flat base)/#13(sealed base),             #6,                            #14:

-                    #9:

BIRGENAIR, Istanbul, Turkey, 1988 - 1996.      - #1:

Blue Air, Bukarest, Romania, founded 2004.    -   #4,                #5,                   #7:
     
-           #8,                                         #9:

Bluebird Airways, Heraklion / Crete, Greece, founded 2008.    - #1,      #2:

Blue Line, Paris-Roissy, France, 2002-2010.  #2:
         
Blue Panorama, Rome-Fiumicino, Italy, founded 1998.
-          #4,                                               #8,                                                    #11:

Blue Scandinavia, Stockholm, Sweden. Successor of Transwede(q.v.), 1996-1998.  -  #1:
        
Blue Wings, Düsseldorf, Germany,  2002 - 2010. - #1(name front and rear),  #2(name at base only):

BoA Boliviana de Aviacion, Cochabamba, Bolivia, founded 2007. 
-              #3,                                                           #1,                                                  #4:

BOAC - British Overseas Airways Corporation, London, UK, 1939-1974.       -   #1:

Bonyad Airlines (Bon Air), Isfahan, Iran, founded 1992 as Bon Air, renamed 1997 as Bonyad, ceased operations 1998.   - #1:
 
BOURAQ Indonesia Airlines, Jakarta. founded 1970, ceased 2005.  -  #10,    #4(arc high in "B"-logo):

BRA (Brasil Rodo Aéreo) Transportes Aéreos, Sao Paulo, Brazil, 1999-2007.   - #1,      #2:

BRAATHENS, Oslo, Norway, 1946-2007 absorbed by SAS.
-                   #10,                                          #1,                         #2/#20 (diff maker rear low):

BRANIFF, Texas, USA,  1928-1982:
-        #10,                                  #1 ,                               #4,                                    #3:

-        #5,                                   #6:

Britannia, UK, 1961-2005 merged into Thomas Cook.  -  #2,     #6,     #1/#7,      #4/#4a:

British Airtours, London, UK, 1974-1988. Founded 1969 as BEA Airtours, renamed 1988 as Caledonian(q.v.). #4:

British Airways, London, UK, founded 1974 by merger of BOAC (q.v.) and BEA -
2011 merged with Iberia into IAG (International Airlines Group).
#30(Helios 9mmØ in left),  #26(Helios 6mmØ in left), #29(no maker), #28(circle w plane in left):
  #30,#26:,#28:
#3(plain base)/#21(maker Helios at base),    #1/#18/#25(diff paper and french text rear),      #9:

          -           #13,                               #6,                                          #5,                #12A(rear):

#15,                                                     #19,                                           #4:

BritishAirways Iberia (IAG - International Airlines Group), Madrid, Spain, founded 2011. 
#1(pointed base, jigsaw cut)/#1a(sealed base, jigsawcut upper rim)/#1b(sealed base all straight cut):

BRITISH CALEDONIAN, GB: Formed 1970 from merger Caledonian(q.v.) and BUA.1987 acquired by BA.
-               #3                                                   #4,                                      #5:

BM =  British Midland, 1965-2001.    #2/#5(diff color star in gussets),    #3,      #4:

BMI = British Midland International,  2001-2019.    -  #5matt/#6glossy,     #7:

bmi baby, Castle Donnington, UK, 2002-2012.  #1:

Brussels Airlines, Belgium,  founded 2007, merger of SN Brussels and Virgin Express.
#1(normal paper)/#2(glossy paper),      #3(star in right)/#4(star in left)/#5(no star),     #7:

Brussels Airlines SN (q.v. SN Brussels).  -  #1:

Brymon Airways, Plymouth, UK, 1970-2002.   -  #1:

BUDDHA Air, Kanthmandu, Nepal, founded 1997.   - #3/#5(lilac clip),  #6/#8(white clip):

Bulgaria Air, successor of Balkan Airlines(q.v.), Sofia, Bulgaria, founded 2002.     
-     #2,                #6/#7(diff. paper, Name Bulgarian/English)/#9(Name both sides English):

-                 #5,                                                  #3:

Bulgarian Air Charter, Sofia, Bulgaria, 2000 - 2021 renamed to European A.C.(q.v.)
 -  #6(maker in right)/14(no maker),    #9,   #10(glossy, base w coversheet)/#12(normal paper, no coversheet): 
          
        -       #4,                                                            #2:

Bundeswehr / Luftwaffe, Berlin, Germany, *1956.  -  #1:

Busy Bee of Norway,  Oslo-Fornebu, 1966 - 1992.   - #1:

Buta Airways, Baku, Azerbaijan, founded 2016 as low-fare subsidiary of AZAL(q.v.),
using ICAO-/IATA-codes and Callsign of AZAL.    -     #1:

BUZZ, London-Stansted, UK. 2000 - 2003 absorbed by Ryanair.  -   #1,     #2: