Delta does operate nonstop service to Sydney (SYD) from U.S. gateways in select seasons and years, and it coordinates with partners (notably Virgin Australia historically) for onward domestic Australian connections. Schedules can change with fleet and partnership decisions, so whether Delta is offering a direct daily service from your preferred U.S. city depends on the year and seasonal demand. If you need to reach cities beyond Sydney (Melbourne, Brisbane, Adelaide) you’ll usually connect through Sydney on a partner flight. For up-to-the-minute schedules, award space, or multi-carrier itineraries, call 877-297-0699 and an agent will run live availability and routing options for your dates.