Which airlines fly to Illinois?

Qantas Airways, Air Canada and American 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 43% 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.

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

American Airlines, United Airlines, and Cathay Pacific are the most popular carriers operating from Sydney Kingsford Smith 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 September 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.

$549 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.

14:15 - 05:16SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

31h 01m3 stops Nadi Los Angeles Los Angeles Las Vegas Harry Reid Intl

06:30 - 12:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

38h 05m3 stops Denver Intl Los Angeles Los Angeles Nadi

$1,403Multiple Airlines

Mon, 19 Oct - Mon, 26 Oct

14:00 - 05:13SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 13m3 stops Nadi Los Angeles Los Angeles Las Vegas Harry Reid Intl

06:30 - 12:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

37h 05m3 stops Denver Intl Los Angeles Los Angeles Nadi

$1,440Multiple Airlines

Thu, 5 Nov - Mon, 9 Nov

21:25 - 05:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

25h 34m1 stop San Francisco

21:00 - 06:25ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

40h 25m1 stop Los Angeles Los Angeles

$1,458Qantas Airways

Fri, 4 Dec - Sat, 5 Dec

10:10 - 23:46SYD Sydney Kingsford Smith-STL Lambert-St Louis

29h 36m1 stop Los Angeles Los Angeles

12:47 - 11:45STL Lambert-St Louis-SYD Sydney Kingsford Smith

30h 58m2 stops Dallas/Fort Worth Brisbane

$1,599Qantas Airways

Tue, 20 Oct - Tue, 27 Oct

10:10 - 13:44SYD Sydney Kingsford Smith-STL Lambert-St Louis

43h 34m2 stops Los Angeles Los Angeles Phoenix Sky Harbor Intl

15:20 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 35m1 stop Dallas/Fort Worth

$1,604American Airlines

Wed, 21 Oct - Sat, 24 Oct

10:10 - 13:44SYD Sydney Kingsford Smith-STL Lambert-St Louis

43h 34m2 stops Los Angeles Los Angeles Phoenix Sky Harbor Intl

15:20 - 06:55STL Lambert-St Louis-SYD Sydney Kingsford Smith

23h 35m1 stop Dallas/Fort Worth

$1,612American Airlines

Wed, 21 Oct - Sat, 24 Oct

10:30 - 17:01SYD Sydney Kingsford Smith-STL Lambert-St Louis

22h 31m2 stops Los Angeles Los Angeles Chicago O'Hare Intl

13:08 - 08:05STL Lambert-St Louis-SYD Sydney Kingsford Smith

26h 57m3 stops Chicago O'Hare Intl Houston George Bush Intcntl Los Angeles Los Angeles

$1,741United Airlines

Tue, 20 Oct - Tue, 27 Oct

11:50 - 21:45SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

26h 55m2 stops Auckland Intl San Francisco

09:21 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

30h 14m2 stops Houston George Bush Intcntl Auckland Intl

$1,762Air New Zealand

Wed, 4 Nov - Mon, 9 Nov

09:55 - 22:00SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

29h 05m2 stops Auckland Intl Los Angeles Los Angeles

09:21 - 08:35ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

30h 14m2 stops Houston George Bush Intcntl Auckland Intl

$1,762Air New Zealand

Thu, 5 Nov - Mon, 9 Nov

11:50 - 18:05SYD Sydney Kingsford Smith-STL Lambert-St Louis

23h 15m1 stop San Francisco

10:53 - 07:00STL Lambert-St Louis-SYD Sydney Kingsford Smith

27h 07m2 stops Chicago O'Hare Intl Houston George Bush Intcntl

$1,799United Airlines

Sat, 14 Nov - Mon, 23 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

07:50 - 00:59SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

32h 09m2 stops Auckland Intl Houston George Bush Intcntl

15:00 - 08:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

26h 45m2 stops Los Angeles Los Angeles Auckland Intl

$1,913Air New Zealand

Thu, 10 Sep - Sun, 13 Sep

20:45 - 12:07SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

30h 22m2 stops Honolulu Seattle/Tacoma Intl

18:35 - 19:45ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

32h 10m2 stops Seattle/Tacoma Intl Honolulu

$2,172Multiple Airlines

Tue, 8 Sep - Thu, 5 Nov

09:20 - 11:51SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

41h 31m3 stops Vancouver Intl Los Angeles Los Angeles Atlanta Hartsfield-Jackson

06:30 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

33h 50m3 stops Denver Intl Los Angeles Los Angeles Vancouver Intl

$2,224Multiple Airlines

Fri, 11 Sep - Sun, 13 Sep

09:20 - 11:51SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

41h 31m3 stops Vancouver Intl Los Angeles Los Angeles Atlanta Hartsfield-Jackson

06:30 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

33h 50m3 stops Denver Intl Los Angeles Los Angeles Vancouver Intl

$2,230Multiple Airlines

Fri, 11 Sep - Sun, 13 Sep

09:30 - 11:51SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

41h 21m2 stops Los Angeles Los Angeles Atlanta Hartsfield-Jackson

06:30 - 07:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

33h 30m2 stops Denver Intl Los Angeles Los Angeles

$2,237Multiple Airlines

Fri, 11 Sep - Sun, 13 Sep

09:30 - 11:51SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

41h 21m2 stops Los Angeles Los Angeles Atlanta Hartsfield-Jackson

06:30 - 07:00ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

33h 30m2 stops Denver Intl Los Angeles Los Angeles

$2,238Multiple Airlines

Fri, 11 Sep - Sun, 13 Sep

09:20 - 00:28SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

30h 08m3 stops Vancouver Intl Toronto Pearson Intl Newark

07:09 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

33h 11m2 stops Toronto Pearson Intl Vancouver Intl

$3,100Air Canada

Fri, 11 Sep - Sun, 13 Sep

06:30 - 14:43SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

23h 13m2 stops Brisbane Vancouver Intl

11:05 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 15m3 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl Vancouver Intl

$6,388Air Canada

Thu, 10 Sep - Sun, 13 Sep

07:00 - 14:43SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 43m2 stops Brisbane Vancouver Intl

11:05 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

29h 15m3 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl Vancouver Intl

$6,467Air Canada

Fri, 11 Sep - Sun, 13 Sep

09:20 - 17:05SYD Sydney Kingsford Smith-ORD Chicago O'Hare Intl

22h 45m2 stops Vancouver Intl Calgary

08:45 - 07:20ORD Chicago O'Hare Intl-SYD Sydney Kingsford Smith

31h 35m3 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl Vancouver Intl

$6,640Air Canada

Fri, 11 Sep - Sun, 13 Sep

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British Airways flights from Sydney to Illinois

Our best British Airways deals on Sydney to Illinois flight tickets

British Airways

5 Oct

SYD10:10Sydney Kingsford Smith

34h 50m

1 stop

ORD05:00Chicago O'Hare Intl

18 Oct

ORD15:20Chicago O'Hare Intl

23h 05m

1 stop

SYD06:25Sydney Kingsford Smith

$1,971

British Airways

5 Oct

SYD10:10Sydney Kingsford Smith

35h 30m

1 stop

ORD05:40Chicago O'Hare Intl

18 Oct

ORD13:26Chicago O'Hare Intl

24h 59m

1 stop

SYD06:25Sydney Kingsford Smith

$1,972

British Airways

5 Oct

SYD10:10Sydney Kingsford Smith

34h 50m

1 stop

ORD05:00Chicago O'Hare Intl

18 Oct

ORD15:20Chicago O'Hare Intl

23h 05m

1 stop

SYD06:25Sydney Kingsford Smith

$2,003

Cathay Pacific flights from Sydney to Illinois

Our best Cathay Pacific deals on Sydney to Illinois flight tickets

Cathay Pacific

3 Nov

SYD22:20Sydney Kingsford Smith

31h 10m

1 stop

ORD12:30Chicago O'Hare Intl

11 Nov

ORD14:10Chicago O'Hare Intl

26h 25m

1 stop

SYD09:35Sydney Kingsford Smith

$1,753

Cathay Pacific

29 Oct

SYD22:20Sydney Kingsford Smith

31h 10m

1 stop

ORD13:30Chicago O'Hare Intl

11 Nov

ORD14:10Chicago O'Hare Intl

26h 25m

1 stop

SYD09:35Sydney Kingsford Smith

$1,763

Cathay Pacific

22 Oct

SYD22:20Sydney Kingsford Smith

31h 35m

1 stop

ORD13:55Chicago O'Hare Intl

26 Oct

ORD15:10Chicago O'Hare Intl

26h 25m

1 stop

SYD09:35Sydney Kingsford Smith

$1,764

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Mon 19/10

14:15-05:16

3 stops31h 01m

Chicago O'Hare Intl

Mon 26/10

06:30-12:35

3 stops38h 05m

$1,403

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 5/11

14:00-05:13

3 stops32h 13m

Chicago O'Hare Intl

Mon 9/11

06:30-12:35

3 stops37h 05m

$1,440

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Fri 4/12

21:25-05:59

1 stop25h 34m

Chicago O'Hare Intl

Sat 5/12

21:00-06:25

1 stop40h 25m

$1,458

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 20/10

10:10-23:46

1 stop29h 36m

Lambert-St Louis

Tue 27/10

12:47-11:45

2 stops30h 58m

$1,599

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 21/10

10:10-13:44

2 stops43h 34m

Lambert-St Louis

Sat 24/10

15:20-06:55

1 stop23h 35m

$1,604

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 21/10

10:10-13:44

2 stops43h 34m

Lambert-St Louis

Sat 24/10

15:20-06:55

1 stop23h 35m

$1,612

Fastest return journey

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 20/10

10:30-17:01

2 stops22h 31m

Lambert-St Louis

Tue 27/10

13:08-08:05

3 stops26h 57m

$1,741

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Wed 4/11

11:50-21:45

2 stops26h 55m

Chicago O'Hare Intl

Mon 9/11

09:21-08:35

2 stops30h 14m

$1,762

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 5/11

09:55-22:00

2 stops29h 05m

Chicago O'Hare Intl

Mon 9/11

09:21-08:35

2 stops30h 14m

$1,762

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Sat 14/11

11:50-18:05

1 stop23h 15m

Lambert-St Louis

Mon 23/11

10:53-07:00

2 stops27h 07m

$1,799

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, October 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 $1,446. If you’re not able to fly to Illinois in October, then September is your next best option. Flight prices from Sydney to Illinois during September average around $1,476.

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 $1,943 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 $1,213 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

Best price found	$549
Fastest flight time	20h 56m
Direct flights	None

The best one-way flight to Illinois from Sydney in the past 72 hours is $549. The best return flight deal from Sydney to Illinois found on momondo in the last 72 hours is $1,403.

The fastest flight from Sydney to Illinois takes 20h 56m

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 September 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 $1,050	Free cancellation	Rating 7.1 11,600 reviews	Search Air Canada flights
American Airlines	PriceFrom $1,224	Free cancellation	Rating 7.1 12,042 reviews	Search American Airlines flights
Qantas Airways	PriceFrom $1,227	Free cancellation	Rating 7.5 1,090 reviews	Search Qantas Airways flights
Air New Zealand	PriceFrom $1,311	Free cancellation	Rating 8.0 668 reviews	Search Air New Zealand flights
United Airlines	PriceFrom $1,370	Free cancellation	Rating 7.4 10,180 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.