In looking to book SMF-Milan in August, the most desirable flight (with one change in ORD) was offered for 70000 miles in Economy one way. So,we booked a less desirable flight, SMF-ORD-FRA-MIL, available for 33000 miles.

Less than 3 weeks later, United advised us of a schedule change, now requiring an even less desirable set of flights, SMF-SFO-ORD-FRA-MIL, as the previously-offered connecting SMF-ORD flight apparently is no longer being offered.

We got on the phone with United, and requested to be moved to the flight we wanted in the first place, SMF-ORD-MXP, and the agent immediately agreed. So, now we have our first choice of flights, but for only 33000 rather than 70000 miles. On a cash basis, United wants $1256 for Economy for this flight.

For Economy Plus on the better flight, United wanted 110000 miles total, or an additional $765 above the standard Economy cash fare. On the other hand, once our standard Economy seats have been booked, we are able to to upgrade the seats to Economy Plus for about $429 per person for the most expensive selection in the exit row. Think we will be doing that.

I once posted my annoyance at airlines offering flights and then withdrawing them. A FT contributor urged me not to be annoyed, but rather to view schedule changes as an opportunity. That principle appears to be proven in my most recent experience. In other words, book any flight when booking well in advance, and chances are that there will be one or more schedule changes. At that point the airline will need to reaccommodate, and one can request the most beneficial flights one wanted all along, which of course are themselves subject to additional schedule changes. Nothing is guaranteed, but at least there may be an opportunity.