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

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Chicago (ORD) to Sydney (SYD), with fares starting from $658.

What is the lowest current fare from ORD to SYD?

The lowest currently-listed fare from Chicago (ORD) to Sydney (SYD) is $658 on 2026-09-27.

Is there a direct flight from Chicago to Sydney?

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

Cheap flights from Chicago to Sydney

Cheapest current fares: $658 in September 2026 on connecting flights.

Last updated August 9, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Chicago (ORD) to Sydney (SYD). Refreshed daily.

Chicago (ORD) → Sydney (SYD)

September 2026 $658
August 2026 $695
October 2026 $783

Frequently asked questions

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

Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Chicago (ORD) to Sydney (SYD), with fares starting from $658.
What is the lowest current fare from ORD to SYD?

The lowest currently-listed fare from Chicago (ORD) to Sydney (SYD) is $658 on 2026-09-27.
Is there a direct flight from Chicago to Sydney?

There is currently no non-stop service from ORD 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.