Originally Posted by
RJA321
I was at Heathrow a short while ago checking in for EK6, when the lady at the counter next to mine was asking the passenger if he preferred to fly on the earlier flight (EK4) back to Dubai as it was not as full as EK6. He agreed and she printed out a boarding pass for him for EK4, and as far as I could tell there was no charge.
Thus saving them having to IDB/Downgrade someone on EK6