What is the cheapest month to fly from Seattle to Sydney?

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Seattle (SEA) to Sydney (SYD), with fares starting from $613.

What is the lowest current fare from SEA to SYD?

The lowest currently-listed fare from Seattle (SEA) to Sydney (SYD) is $613 on 2026-09-10.

Is there a direct flight from Seattle to Sydney?

There is currently no non-stop service from SEA to SYD. Most travellers connect through a hub airport. See our route page for current stopover options.

Cheap flights from Seattle to Sydney

Cheapest current fares: $613 in September 2026 on connecting flights.

Last updated August 4, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Seattle (SEA) to Sydney (SYD). Refreshed daily.

Seattle (SEA) → Sydney (SYD)

September 2026 $613

Frequently asked questions

What is the cheapest month to fly from Seattle to Sydney?

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Seattle (SEA) to Sydney (SYD), with fares starting from $613.
What is the lowest current fare from SEA to SYD?

The lowest currently-listed fare from Seattle (SEA) to Sydney (SYD) is $613 on 2026-09-10.
Is there a direct flight from Seattle to Sydney?

There is currently no non-stop service from SEA to SYD. Most travellers connect through a hub airport. See our route page for current stopover options.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.