Which airlines fly to Illinois?

Qantas Airways, Air Canada and Air New Zealand 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 42% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 5 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 5 as of July 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.

$636 Cheap Flights from Sydney to Illinois in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Sydney to Illinois

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

09:20 - 10:16

SYD

ORD

39h 56m

2 stops

15:40 - 07:20

ORD

SYD

24h 40m

1 stop

$1,286Air Canada

Mon, 17 Aug - Mon, 31 Aug

09:20 - 10:16

SYD

ORD

39h 56m

2 stops

08:50 - 07:20

ORD

SYD

31h 30m

2 stops

$1,286Air Canada

Mon, 17 Aug - Mon, 31 Aug

13:15 - 05:59

SYD

ORD

31h 44m

2 stops

06:05 - 11:50

ORD

SYD

38h 45m

3 stops

$1,409Multiple Airlines

Sun, 6 Sep - Sun, 13 Sep

13:15 - 11:17

SYD

STL

37h 02m

3 stops

12:17 - 11:50

STL

SYD

32h 33m

3 stops

$1,409Multiple Airlines

Wed, 9 Sep - Wed, 16 Sep

10:10 - 23:46

SYD

STL

29h 36m

1 stop

12:58 - 06:55

STL

SYD

24h 57m

1 stop

$1,501American Airlines

Wed, 14 Oct - Sun, 8 Nov

09:20 - 14:13

SYD

STL

21h 53m

1 stop

17:55 - 07:00

STL

SYD

44h 05m

1 stop

$1,514United Airlines

Thu, 12 Nov - Mon, 16 Nov

10:20 - 17:59

SYD

STL

22h 39m

1 stop

13:36 - 07:00

STL

SYD

26h 24m

2 stops

$1,515United Airlines

Thu, 27 Aug - Thu, 10 Sep

09:10 - 22:59

SYD

STL

28h 49m

1 stop

06:00 - 07:05

STL

SYD

34h 05m

1 stop

$1,551Qantas Airways

Thu, 27 Aug - Thu, 10 Sep

11:20 - 18:15

SYD

STL

23h 55m

2 stops

19:05 - 06:55

STL

SYD

42h 50m

1 stop

$1,574American Airlines

Thu, 12 Nov - Mon, 16 Nov

09:10 - 22:59

SYD

STL

28h 49m

1 stop

06:00 - 07:05

STL

SYD

34h 05m

1 stop

$1,634Qantas Airways

Sun, 6 Sep - Sun, 13 Sep

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Air New Zealand flights from Sydney to Illinois

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

Air New Zealand

15 Oct

SYD09:55Sydney Kingsford Smith

28h 35m

2 stops

STL22:30Lambert-St Louis

8 Nov

STL08:00Lambert-St Louis

31h 35m

2 stops

SYD08:35Sydney Kingsford Smith

$1,668

Air New Zealand

9 Sept

SYD11:55Sydney Kingsford Smith

28h 04m

2 stops

ORD00:59Chicago O'Hare Intl

19 Sept

ORD13:00Chicago O'Hare Intl

28h 45m

2 stops

SYD08:45Sydney Kingsford Smith

$1,738

Air New Zealand

8 Sept

SYD11:55Sydney Kingsford Smith

31h 50m

2 stops

ORD04:45Chicago O'Hare Intl

15 Sept

ORD15:35Chicago O'Hare Intl

26h 10m

2 stops

SYD08:45Sydney Kingsford Smith

$1,762

Cathay Pacific flights from Sydney to Illinois

Our best Cathay Pacific deals on Sydney to Illinois flight tickets

Cathay Pacific

3 Sept

SYD14:05Sydney Kingsford Smith

39h 15m

1 stop

ORD14:20Chicago O'Hare Intl

16 Sept

ORD16:15Chicago O'Hare Intl

36h 55m

1 stop

SYD20:10Sydney Kingsford Smith

$2,054

Cathay Pacific

8 Sept

SYD14:05Sydney Kingsford Smith

39h 15m

1 stop

ORD14:20Chicago O'Hare Intl

15 Sept

ORD16:00Chicago O'Hare Intl

28h 45m

1 stop

SYD11:45Sydney Kingsford Smith

$2,058

Cathay Pacific

16 Nov

SYD15:15Sydney Kingsford Smith

38h 40m

1 stop

ORD12:55Chicago O'Hare Intl

29 Nov

ORD14:35Chicago O'Hare Intl

26h 00m

1 stop

SYD09:35Sydney Kingsford Smith

$2,067

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 17/8

09:20-10:16

2 stops39h 56m

Chicago O'Hare Intl

Mon 31/8

15:40-07:20

1 stop24h 40m

$1,286

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 17/8

09:20-10:16

2 stops39h 56m

Chicago O'Hare Intl

Mon 31/8

08:50-07:20

2 stops31h 30m

$1,286

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sun 6/9

13:15-05:59

2 stops31h 44m

Chicago O'Hare Intl

Sun 13/9

06:05-11:50

3 stops38h 45m

$1,409

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 9/9

13:15-11:17

3 stops37h 02m

Lambert-St Louis

Wed 16/9

12:17-11:50

3 stops32h 33m

$1,409

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Wed 14/10

10:10-23:46

1 stop29h 36m

Lambert-St Louis

Sun 8/11

12:58-06:55

1 stop24h 57m

$1,501

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/11

09:20-14:13

1 stop21h 53m

Lambert-St Louis

Mon 16/11

17:55-07:00

1 stop44h 05m

$1,514

Fastest return journey

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 27/8

10:20-17:59

1 stop22h 39m

Lambert-St Louis

Thu 10/9

13:36-07:00

2 stops26h 24m

$1,515

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 27/8

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Thu 10/9

06:00-07:05

1 stop34h 05m

$1,551

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/11

11:20-18:15

2 stops23h 55m

Lambert-St Louis

Mon 16/11

19:05-06:55

1 stop42h 50m

$1,574

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sun 6/9

09:10-22:59

1 stop28h 49m

Lambert-St Louis

Sun 13/9

06:00-07:05

1 stop34h 05m

$1,634

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, September 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 $1,506. If you’re not able to fly to Illinois in September, then October is your next best option. Flight prices from Sydney to Illinois during October average around $1,526.

How far in advance should I book a flight from Sydney 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 $1,959 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 $1,468 on momondo.

Can stopping save me money on Sydney to Illinois flights?

You could potentially save up to 17% 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	21h 10m
Direct flights	None

The fastest flight from Sydney to Illinois takes 21h 10m

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

Search flight deals

Frequently asked questions about flying from Sydney to Illinois

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 5 as of July 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
Air Canada	PriceFrom $1,083	Free cancellation	Rating 7.1 11,398 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $1,261	Free cancellation	Rating 7.5 1,067 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $1,262	Free cancellation	Rating 7.1 11,841 reviews	Search American Airlines flights
Air New Zealand	PriceFrom $1,352	Free cancellation	Rating 8.0 655 reviews	Search Air New Zealand flights
United Airlines	PriceFrom $1,413	Free cancellation	Rating 7.4 10,046 reviews	Search United Airlines 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.