What is the cheapest airline that flies from Sydney Kingsford Smith to Illinois?

Air New Zealand, American Airlines, and Air Canada are the most popular carriers operating from Sydney Kingsford Smith to Illinois

Which airlines fly to Illinois?

Qantas Airways, Air Canada and United Airlines are the top three most popular airlines that fly to Illinois from Sydney according to our data. Qantas Airways is the first choice among our users, with 44% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Sydney Kingsford Smith Airport to Illinois?

Prices for flights from Sydney Kingsford Smith Airport to Illinois were last updated today.

How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Illinois?

The number of operators available for flights from Sydney Kingsford Smith Airport to Illinois is 6 as of March 2026.

How old do you have to be to fly from Sydney Kingsford Smith Airport to Illinois?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Sydney Kingsford Smith Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$726 Cheap Flights from Sydney to Illinois in 2026

1 adult

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Find the cheapest flights from Sydney to Illinois

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

13:15 - 05:35

SYD

ORD

31h 20m

2 stops

15:00 - 11:50

ORD

SYD

29h 50m

2 stops

$1,280Multiple Airlines

Sat, 25 Apr - Sat, 2 May

13:15 - 23:27

SYD

ORD

25h 12m

2 stops

14:00 - 22:10

ORD

SYD

41h 10m

2 stops

$1,425Multiple Airlines

Tue, 21 Apr - Fri, 24 Apr

13:15 - 05:50

SYD

ORD

31h 35m

2 stops

12:44 - 12:05

ORD

SYD

32h 21m

2 stops

$1,428Multiple Airlines

Mon, 11 May - Mon, 1 Jun

11:55 - 23:15

SYD

ORD

26h 20m

2 stops

16:30 - 08:45

ORD

SYD

25h 15m

2 stops

$1,432Air New Zealand

Fri, 5 Jun - Fri, 19 Jun

11:55 - 23:15

SYD

ORD

26h 20m

2 stops

15:47 - 17:50

ORD

SYD

35h 03m

2 stops

$1,445Air New Zealand

Fri, 5 Jun - Fri, 19 Jun

11:55 - 23:15

SYD

ORD

26h 20m

2 stops

15:47 - 17:50

ORD

SYD

35h 03m

2 stops

$1,446Air New Zealand

Fri, 5 Jun - Fri, 19 Jun

09:10 - 16:33

SYD

STL

22h 23m

2 stops

09:08 - 07:05

STL

SYD

30h 57m

2 stops

$1,562American Airlines

Wed, 27 May - Sun, 31 May

10:20 - 18:17

SYD

STL

22h 57m

1 stop

19:23 - 06:55

STL

SYD

20h 32m

1 stop

$1,587United Airlines

Wed, 27 May - Sun, 31 May

09:20 - 20:54

SYD

STL

26h 34m

2 stops

16:30 - 07:20

STL

SYD

23h 50m

2 stops

$1,646Air Canada

Tue, 21 Apr - Tue, 28 Apr

09:20 - 12:06

SYD

STL

41h 46m

2 stops

07:05 - 07:20

STL

SYD

57h 15m

2 stops

$1,756Air Canada

Sun, 3 May - Sun, 17 May

Air New Zealand flights from Sydney to Illinois

Our best Air New Zealand deals on Sydney to Illinois flight tickets

Air New Zealand

5 June

SYD11:55Sydney Kingsford Smith

26h 20m

2 stops

ORD23:15Chicago O'Hare Intl

19 June

ORD16:30Chicago O'Hare Intl

25h 15m

2 stops

SYD08:45Sydney Kingsford Smith

$1,432

Air New Zealand

5 June

SYD11:55Sydney Kingsford Smith

26h 20m

2 stops

ORD23:15Chicago O'Hare Intl

19 June

ORD15:47Chicago O'Hare Intl

35h 03m

2 stops

SYD17:50Sydney Kingsford Smith

$1,445

Air New Zealand

5 June

SYD11:55Sydney Kingsford Smith

26h 20m

2 stops

ORD23:15Chicago O'Hare Intl

19 June

ORD15:47Chicago O'Hare Intl

35h 03m

2 stops

SYD17:50Sydney Kingsford Smith

$1,446

Qantas Airways flights from Sydney to Illinois

Our best Qantas Airways deals on Sydney to Illinois flight tickets

Qantas Airways

23 Apr

SYD09:10Sydney Kingsford Smith

20h 06m

1 stop

ORD14:16Chicago O'Hare Intl

30 Apr

ORD19:21Chicago O'Hare Intl

20h 44m

1 stop

SYD07:05Sydney Kingsford Smith

$1,839

Qantas Airways

7 Aug

SYD22:00Sydney Kingsford Smith

35h 29m

2 stops

STL18:29Lambert-St Louis

31 Aug

STL19:46Lambert-St Louis

20h 09m

1 stop

SYD06:55Sydney Kingsford Smith

$2,046

Qantas Airways

7 Aug

SYD12:00Sydney Kingsford Smith

19h 51m

1 stop

STL16:51Lambert-St Louis

31 Aug

STL19:46Lambert-St Louis

20h 09m

1 stop

SYD06:55Sydney Kingsford Smith

$2,095

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 25/4

13:15-05:35

2 stops31h 20m

Chicago O'Hare Intl

Sat 2/5

15:00-11:50

2 stops29h 50m

$1,280

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 21/4

13:15-23:27

2 stops25h 12m

Chicago O'Hare Intl

Fri 24/4

14:00-22:10

2 stops41h 10m

$1,425

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 11/5

13:15-05:50

2 stops31h 35m

Chicago O'Hare Intl

Mon 1/6

12:44-12:05

2 stops32h 21m

$1,428

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 5/6

11:55-23:15

2 stops26h 20m

Chicago O'Hare Intl

Fri 19/6

16:30-08:45

2 stops25h 15m

$1,432

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 5/6

11:55-23:15

2 stops26h 20m

Chicago O'Hare Intl

Fri 19/6

15:47-17:50

2 stops35h 03m

$1,445

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 5/6

11:55-23:15

2 stops26h 20m

Chicago O'Hare Intl

Fri 19/6

15:47-17:50

2 stops35h 03m

$1,446

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

09:10-16:33

2 stops22h 23m

Lambert-St Louis

Sun 31/5

09:08-07:05

2 stops30h 57m

$1,562

Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 27/5

10:20-18:17

1 stop22h 57m

Lambert-St Louis

Sun 31/5

19:23-06:55

1 stop20h 32m

$1,587

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 21/4

09:20-20:54

2 stops26h 34m

Lambert-St Louis

Tue 28/4

16:30-07:20

2 stops23h 50m

$1,646

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 3/5

09:20-12:06

2 stops41h 46m

Lambert-St Louis

Sun 17/5

07:05-07:20

2 stops57h 15m

$1,756

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Sydney to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Illinois?

In general, August is the cheapest month to fly from Sydney to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,472. If you’re not able to fly to Illinois in August, then July is your next best option. Flight prices from Sydney to Illinois during July average around $1,545.

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Sydney when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $1,800 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Sydney for as low as $1,179 on momondo.

Can stopping save me money on Sydney to Illinois flights?

You could potentially save up to 1% on your flight if you consider stops on a Sydney to Illinois flight.

Cheap Sydney to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sydney to Illinois

Fastest flight time	20h 21m
Direct flights	None

The fastest flight from Sydney to Illinois takes 20h 21m

There are no direct flights from Sydney to Illinois. There are no popular flight routes from Sydney to Illinois.

Search flight deals

When did momondo last update prices for flights from Sydney Kingsford Smith Airport to Illinois?
Prices for flights from Sydney Kingsford Smith Airport to Illinois were last updated today.
How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Illinois?
The number of operators available for flights from Sydney Kingsford Smith Airport to Illinois is 6 as of March 2026.
How old do you have to be to fly from Sydney Kingsford Smith Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Sydney Kingsford Smith Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Sydney to Illinois

Compare and see reviews for airlines that fly from Sydney to Illinois with momondo

Airline	Rating	Free cancellation	Price
Qantas Airways	PriceFrom $982	Free cancellation	Rating 7.5 1,003 reviews	Search Qantas Airways flights
Air Canada	PriceFrom $1,066	Free cancellation	Rating 7.1 10,800 reviews	Search Air Canada flights
American Airlines	PriceFrom $1,097	Free cancellation	Rating 7.1 11,423 reviews	Search American Airlines flights
Air New Zealand	PriceFrom $1,331	Free cancellation	Rating 8.0 610 reviews	Search Air New Zealand flights
United Airlines	PriceFrom $1,391	Free cancellation	Rating 7.4 9,415 reviews	Search United Airlines flights
ANA	PriceFrom $1,478	Free cancellation	Rating 8.4 1,124 reviews	Search ANA flights

Why use momondo?

Why should I use momondo to find a flight deal from Sydney to Illinois?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Sydney to Illinois . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Sydney to Illinois with flexible booking policies on momondo?

Yes. All flights to Illinois from Sydney on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Sydney to Illinois?

momondo provides multiple filters to help you find the best flight to Illinois from Sydney. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Sydney to Illinois right now. Can momondo alert me if prices change?

Price alerts on flights to Illinois from Sydney are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.