5 Killer Quora Answers on 롤듀오
https://www.evernote.com/shard/s315/sh/503cb302-f085-4d54-b760-67c042be0f98/dac49f1423ccd57cd9e73a6936b6a7e0
It could be probable that you just consider the cost of the flights, agenda or promotions and dont spend any consideration to the airline that will take you on your wished destination.