Route brief · CHI → SYD
Chicago → Sydney
$923
round-trip · too little price history on this route to compare
Nov 7 – Dec 4 · 27 nights
United1 stop
Cached fare — the booking search re-prices live before you pay.
Destination briefSYDSydneyHarbour sails, cliff walks and flat whites that ruin you for coffee anywhere else.Best windowOct–Nov · Mar–AprAirportsKingsford Smith (SYD)All routes into SydneyWhen this route gets cheap.
Best time to be in Sydney: Oct–Nov · Mar–Apr. Fare history for this route is still thin, so we make no seasonal call yet.
The cheapest itinerary we are tracking makes one stop and takes about 20.5 hours outbound, on a 27-night trip — ticketed under United, which on a connecting fare need not operate every leg. At $923 for 14,876 km each way, that works out to about $31 per 1,000 km flown. That is below the $40 typical of ultra-long-haul fares here. Across the 34 departure cities we track at a similar distance from Sydney, this fare ranks 8th — 13% above the $814 from Los Angeles. That puts it in the cheaper half of the 26 routes of similar length we watch out of Chicago, where the middle fare is $930. We have 2 months of cached prices for this route so far — not enough to call a fare cheap or expensive, so we publish the price without a percentage.
The 2 days we hold a cached fare for
Tap a date → live search
The median cached fare across this calendar is 12% lower than when tracking began on Aug 9 — $1,251 then versus $1,107 now, across 4 recorded snapshots. This is a calendar-level trend, so an individual deal above can be lower. The lowest single day we have seen here is $923, on Nov 7.
These are the only days we have a cached price for on this route so far — not the only days it flies. The search above covers any date.
Route facts
- Airports
- O’Hare (ORD) · Midway (MDW) ↔ Kingsford Smith (SYD)
- Flight time
- ~20.5 hours outbound
- Distance
- ~14,876 km each way
- Airlines on the board
- United
- Itineraries
- Connections on current fares
- Best months to visit
- Oct–Nov · Mar–Apr
CHI → SYD, answered.
How far in advance should I book CHI → Sydney?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. See /guides/what-moves-a-flight-price/ for the levers we can measure.
Are there nonstop flights from Chicago to Sydney?
The current cheapest fares involve a connection, ticketed under United. Nonstop options exist on many dates at higher prices — check the live search for your exact dates.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on August 24). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Sydney?
Lock the flight first — then compare stays for Nov 7 – Dec 4 · 27 nights.
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Missed it?
Cached fares expire. This route has a feed of its own — follow it and the next CHI → SYD drop reaches you as soon as we find it.
Follow CHI → SYD