I know you are not directly asking this, but keep in mind that until the day of travel, you deal with whoever you booked through. So if any flights are cancelled, or the schedule changes, etc, you will be dealing with Expedia if that's where you bought the ticket. Without commenting on the quality of customer service at either company, it does add an additional entity to any problem resolution. An when you have a multi-leg journey, a change/cancellation of flights is not unheard of.