Usually we see the best airfare deals when one airline attacks another airline’s hub cities with cheap deals. For instance United might offer great fares from American cities like Dallas and Charlotte and Delta cities like Atlanta and Detroit.
You don’t usually see an airline offering the cheapest fares from its own hub cities. That’s because they are usually thought to have pricing power there — the best schedules with the fewest connections that people will pay more for.
Right now though United appears to be offering amazing cheap fares to Southeast Asia from its own hub cities.