Cheapest one-way flights from Chicago to Sydney in April from $451

Best time to book flights for Chicago (ORD) to Sydney (SYD) flights at AirHint

AirHint found the following cheapest one-way flights from Chicago (ORD) to Sydney (SYD) in April 2025 (see full year).

One-Way flights

10 Apr Spirit Airlines
02 Apr Alaska Airlines
08 Apr Frontier Airlines
09 Apr Spirit Airlines
11 Apr Spirit Airlines
15 Apr Frontier Airlines

Also check the deals for return flights from Chicago to Sydney in April.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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