If you can understand well that how does the system of fee works then you can understand well because fee required minimum for transaction is about 0.0001btc to 0.0005 maximum for confirmation .
Here you should see toward that factor at which fee depends , fee directly depends upon input and output of transaction .
If you are sending bitcoin that is received from multiple people then surely you will needed to pay that times more than what need for single transaction .
So my suggestion for you to use custom fee option and pay 0.0001btc to 0.0005btc maximum and leave it for 2 to 3 hours , it will easily get confirm without much wait .