Starting from outside Madrid gives you a few extra options.
Code:
BCN-SJO SAT-25JUN16 BA
TAXES/FEES NOT INCLUDED
ADULT FARES
CX FARE FARE C AP MIN/ SEASONS...... MR GI D
GBP BASIS MAX
1 BA 276.00R RNNN7O R 7| /12M R AT
ORIGIN ADDON ROUTE: 0003
SPECIFIED ROUTE: 0024
BCN-LON(BA/IB)SJO
BCN-LON(BA/IB)MAD(BA/IB)SJO
BCN-LON(BA/IB)MIA(AA/BA)SJO
BCN-LON(BA/IB)MAD(BA/IB)MIA(AA/BA)SJO
BCN-LON-CLT(AA/BA/US)SJO
BCN-LON-MIA(AA/BA/US)SJO
BCN-LON-DFW(AA/BA/US)SJO
BCN-LON-PHX(AA/BA/US)SJO
BCN(BA/IB)LON(BA/IB)SJO
BCN(BA/IB)LON(BA/IB)MAD(BA/IB)SJO
BCN(BA/IB)LON(BA/IB)MIA(AA/BA)SJO
BCN(BA/IB)LON(BA/IB)MAD(BA/IB)MIA(AA/BA)SJO
BCN(BA/IB)LON-CLT(AA/BA/US)SJO
BCN(BA/IB)LON-MIA(AA/BA/US)SJO
BCN(BA/IB)LON-DFW(AA/BA/US)SJO
BCN(BA/IB)LON-PHX(AA/BA/US)SJO
BCN(BA/IB)MAD-LON(BA/IB)SJO
BCN(BA/IB)MAD-LON(BA/IB)MAD(BA/IB)SJO
BCN(BA/IB)MAD-LON(BA/IB)MIA(AA/BA)SJO
BCN(BA/IB)MAD-LON(BA/IB)MAD(BA/IB)MIA(AA/BA)SJO
BCN(BA/IB)MAD-LON-CLT(AA/BA/US)SJO
BCN(BA/IB)MAD-LON-MIA(AA/BA/US)SJO
BCN(BA/IB)MAD-LON-DFW(AA/BA/US)SJO
BCN(BA/IB)MAD-LON-PHX(AA/BA/US)SJO