Air Canada flights to Illinois (USIL) from $1,146

Flight Deals

Cheap Air Canada Flight Deals to Illinois

Here are some of the best deals found on KAYAK recently from Air Canada to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent return Air Canada flight deals from Australia to Illinois

Sun, 8 Mar - Tue, 10 Mar

10:45 - 14:29BNE-STL

43h 44m2 stops

17:54 - 07:45STL-BNE

46h 51m2 stops

$1,234Air Canada

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Thu, 12 Mar - Mon, 16 Mar

10:25 - 15:29SYD-STL

45h 04m2 stops

15:00 - 08:35STL-SYD

25h 35m2 stops

$1,734Air Canada

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Thu, 12 Mar - Mon, 16 Mar

10:25 - 15:29SYD-STL

45h 04m2 stops

09:00 - 08:35STL-SYD

31h 35m2 stops

$1,739Air Canada

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Mon, 2 Feb - Thu, 19 Feb

11:20 - 20:10SYD-ORD

25h 50m2 stops

12:50 - 09:35ORD-SYD

27h 45m2 stops

$1,826Air Canada

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Mon, 2 Feb - Sun, 8 Feb

11:20 - 14:41SYD-ORD

20h 21m1 stop

20:15 - 09:35ORD-SYD

44h 20m2 stops

$1,828Air Canada

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Mon, 2 Feb - Thu, 19 Feb

11:20 - 20:10SYD-ORD

25h 50m2 stops

07:15 - 09:35ORD-SYD

33h 20m3 stops

$1,835Air Canada

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Sun, 3 May - Sun, 17 May

09:20 - 19:30SYD-STL

49h 10m2 stops

16:05 - 07:20STL-SYD

48h 15m2 stops

$1,846Air Canada

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Thu, 19 Feb - Mon, 2 Mar

11:20 - 19:30SYD-ORD

25h 10m2 stops

10:00 - 09:35ORD-SYD

30h 35m2 stops

$1,864Air Canada

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Mon, 2 Feb - Thu, 19 Feb

11:20 - 08:05SYD-ORD

37h 45m2 stops

13:05 - 09:35ORD-SYD

27h 30m1 stop

$1,872Air Canada

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Thu, 12 Mar - Mon, 16 Mar

09:45 - 20:10BNE-ORD

25h 25m2 stops

07:15 - 07:45ORD-BNE

33h 30m2 stops

$1,883Air Canada

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Useful Info

Low season	January
High season	October
Cheapest flight	$1,146
Average price round-trip	$1,790

Best time to beat the crowds but there is an average 10% increase in price.

Most popular time to fly (1% more expensive on average)

Flight from Sydney to Chicago O'Hare Airport

(price for this month)

KAYAK's insights & trends for flights to Illinois

Get data-powered insights and trends for flights to Illinois to help you find the cheapest flights, the best time to fly and much more.

Prices

Based on KAYAK data, the cheapest day to fly to Illinois is Tuesday when return tickets can be as cheap as $1,933. On the other hand, the most expensive day to fly is Sunday, when return prices are $2,187 on average.

What is the cheapest month to fly from Australia to Illinois?

The cheapest month for flights from Australia to Illinois is November, when tickets cost $1,332 (return) on average. On the other hand, the most expensive months are September and July, when the average cost of round-trip tickets is $2,169 and $2,105 respectively.

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7.1

Good10,000 verified ratings

7.8Crew

6.3Food

6.8Entertainment

7.1Comfort

7.3Boarding

Show reviews that mention

2.0 Poor

Noman, Nov 2025

Baggage delayed we had to catch our cruise without any clothes 😒

2.0 Poor

Noman, Nov 2025

Baggage got delayed and ruined our cruise trip

10.0 Wonderful

Anonymous, Nov 2025

Boarding was slow due to airport security. The flight, staff, service and comfort were excellent. A little more complementary meals for 4 hours + flight will go a long way.

2.0 Poor

salih, Nov 2025

I missed my connecting flight due to flight delays

8.0 Very Good

Sugith, Nov 2025

WiFi failed as usual.

10.0 Wonderful

Anonymous, Nov 2025

Good

10.0 Wonderful

Anonymous, Nov 2025

Very nice