Det jag misstänkte. Kanske dra ett försök med ITA Matrix och bara ösa på allt i en resa med ny biljett: Oslo-Warsawa-Barcelona-Stockholm-Oslo / alliance star-alliance.
EDIT: Exempelvis såhär:
Oslo (OSL) to Warsaw (WAW) - Fri, Nov 15
Deutsche Lufthansa AG Oslo (OSL) to Frankfurt (FRA) - Fri, Nov 15
Deutsche Lufthansa AG 6281 Dep: 9:30AM Arr: 11:35AM 2h 5m Boeing 737 Economy (Y)
OPERATED BY SCANDINAVIAN AIRLINES SYSTEM (SAS) Layover in FRA 2h 0m
Deutsche Lufthansa AG Frankfurt (FRA) to Warsaw (WAW) - Fri, Nov 15
Deutsche Lufthansa AG 5746 Dep: 1:35PM Arr: 3:25PM 1h 50m Embraer RJ-175 Economy (Y)
OPERATED BY LOT - POLISH AIRLINES
Warsaw (WAW) to Barcelona (BCN) - Sat, Nov 16
LOT - Polish Airlines Warsaw (WAW) to Frankfurt (FRA) - Sat, Nov 16
LOT - Polish Airlines 5375 Dep: 9:45AM Arr: 11:40AM 1h 55m Airbus A321 Business (D)
OPERATED BY DEUTSCHE LUFTHANSA AG Layover in FRA 1h 25m
Deutsche Lufthansa AG Frankfurt (FRA) to Barcelona (BCN) - Sat, Nov 16
Deutsche Lufthansa AG 1128 Dep: 1:05PM Arr: 3:00PM 1h 55m Airbus A321 Business (D)
Barcelona (BCN) to Stockholm (ARN) - Tue, Nov 19
Deutsche Lufthansa AG Barcelona (BCN) to Frankfurt (FRA) - Tue, Nov 19
Deutsche Lufthansa AG 1131 Dep: 2:30PM Arr: 4:50PM 2h 20m Airbus A321 Economy (Y)
Layover in FRA 1h 30m
Deutsche Lufthansa AG Frankfurt (FRA) to Stockholm (ARN) - Tue, Nov 19
Deutsche Lufthansa AG 6228 Dep: 6:20PM Arr: 8:25PM 2h 5m Boeing 737 Economy (Y)
OPERATED BY SCANDINAVIAN AIRLINES SYSTEM (SAS)
Cost per passenger (including taxes & fees) 39,593.00
Total cost for 1 passenger 39,593.00 NOK