Probably gradual optimizations in flying from Alaska, thru the Aleutian islands, to Kamchatka Russia, to Japan, to Korea, to China, to Taiwan, to the Philippine

Probably gradual optimizations in flying from Alaska, thru the Aleutian islands, to Kamchatka Russia, to Japan, to Korea, to China, to Taiwan, to the Philippines, to Indonesia, to Australia. In fact, going directly over the Pacific is only maybe ~30% shorter.