Originally Posted by jamjaruk

I am booking my next Dubai trip leaving LHR at 8.40am on 11 September 2014 and returning at 3.45pm on 18 September 2014.

I will book a flex ticket and on expertflyer it shows there is an upgrade available on the 8.40am flight but not on the return flight.

I would assume I can book the outward upgrade now and the inward upgrade at a later date if it becomes available?