Yesterday I had a schedule change where everything was highlighted in red (other than the airports themselves, though that happened in a previous round of schedule changes). Every flight for this SEA-BOS RT had had its departure time changed, and was blocked off for a longer time, including one that was blocked off for more than half an hour longer (trying to get higher on-time performances, UA?
), and the flight times resulted in longer layovers. All the flight numbers were changed, and all the aircraft were changed as well, as most of the equipment swaps were sUA to sCO