For those of us based in UK/Europe, it's a familiar fact that starting a long-haul trip from anywhere but London (colloquially "exEU" even though the group can include CAI and IST !) can save significant amounts of money.
In that spirit, please find below a list of (almost) all the airports currently served by direct short-haul BA services into LGW, LCY and LHR, formatted into comma-separated groups of 5 to allow easy copy and paste into ITA Matrix for searching exEU itineraries.
Please feel free to add to Wiki ... or delete if not useful
Code:
ACE,AGP,ALC,ALG,AMM
AMS,ARN,ATH,BCN,BDS
BIO,BLL,BLQ,BOD,BRI
BRU,BSL,BUD,CAG,CAI
CDG,CFU,CHQ,CMF,CPH
CTA,DBV,DUB,DUS,EGC
FAO,FCO,FDH,FLR,FNC
FRA,FSC,FUE,GIB,GNB
GOA,GOT,GRX,GVA,HAJ
HAM,HEL,HER,IBZ,INN
INV,IST,JER,JMK,JSI
JTR,KEF,KLX,KRK,LCA
LEI,LIG,LIN,LIS,LPA
LUX,LYS,MAD,MAH,MJV
MLA,MRS,MUC,MXP,NAP
NCE,NTE,NUE,OLB,OPO
OSL,OTP,PFO,PMI,PMO
PRG,PSA,PUY,RAK,RHO
RTM,SKG,SOF,SPU,STR
SVQ,SZG,TFS,TIA,TLL
TLS,TRN,TXL,UIP,VCE
VIE,VLC,VRN,WAW,ZRH