AirHint found the following cheapest return flights from Chicago (MDW) to Sydney (SYD) in March 2026 (see full year).
Return flights
| 14 Mar - 28 Mar | Frontier Airlines | ||
| 20 Mar - 30 Mar | Frontier Airlines | ||
| 13 Mar - 21 Mar | Frontier Airlines | ||
| 30 Mar - 03 Apr | Frontier Airlines | ||
| 25 Mar - 20 Apr | Air France | ||
| 06 Mar - 20 Mar | Air France |
Also check the deals for one-way flights from Chicago to Sydney in March.
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