Route notes
Why this routing works
This routing keeps the longest stay in Perth, with 19 nights in Australia before a shorter 3-night stop in Singapore on the way back to Seattle. That sequencing works well for travelers who want one primary stop and a brief break in Southeast Asia rather than splitting time evenly across both cities.
As a multi-stop ticket, SEA-PER-SIN-SEA packages the transpacific and regional flights into one itinerary instead of booking separate one-way tickets. The structure is straightforward: outbound to Perth, onward to Singapore, then final return to Seattle, all in economy class.
With a total trip length of 3 weeks and a December departure, the timing is tight enough to keep the route efficient while still allowing a substantial stay in Perth. Singapore is positioned as the shorter final stop, which can help break up the return journey rather than routing straight back from Australia to the US.