Find the cheapest Cathay Pacific flights on Expedia from Sydney (SYD) to Honolulu (HNL). Flight ticket prices change frequently based on availability and demand. We send price-drop alerts to make air travel simple and flexible. The lowest one-way fare found on Expedia with Cathay Pacific for this route in the past 7 days starts at ฿55,850 for travel on November 16, 2026.