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

Delta and American Airlines 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 59% 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 January 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.

$664 Cheap Flights from Sydney to Illinois in 2026

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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.

09:55 - 20:23

SYD

ORD

26h 28m

2 stops

16:00 - 10:30

ORD

SYD

26h 30m

2 stops

$1,493Air New Zealand

Tue, 10 Mar - Tue, 17 Mar

11:45 - 20:23

SYD

ORD

24h 38m

2 stops

14:35 - 08:45

ORD

SYD

26h 10m

2 stops

$1,494Air New Zealand

Tue, 10 Mar - Tue, 17 Mar

11:20 - 21:12

SYD

STL

26h 52m

2 stops

12:27 - 07:05

STL

SYD

27h 38m

2 stops

$1,495American Airlines

Tue, 3 Mar - Mon, 13 Apr

11:20 - 23:59

SYD

STL

29h 39m

1 stop

06:38 - 09:00

STL

SYD

33h 22m

1 stop

$1,500American Airlines

Thu, 19 Feb - Mon, 23 Feb

11:20 - 19:29

SYD

STL

25h 09m

2 stops

14:31 - 09:00

STL

SYD

25h 29m

2 stops

$1,510American Airlines

Thu, 12 Feb - Wed, 18 Feb

11:20 - 14:41

SYD

ORD

20h 21m

1 stop

15:35 - 09:35

ORD

SYD

25h 00m

1 stop

$1,513Air Canada

Tue, 17 Feb - Wed, 4 Mar

10:20 - 14:41

SYD

ORD

20h 21m

1 stop

10:35 - 08:35

ORD

SYD

30h 00m

2 stops

$1,516Air Canada

Tue, 10 Mar - Tue, 17 Mar

06:30 - 17:13

SYD

STL

27h 43m

2 stops

18:50 - 17:50

STL

SYD

30h 00m

2 stops

$1,520Qantas Airways

Fri, 13 Feb - Thu, 19 Feb

12:10 - 20:26

SYD

STL

25h 16m

2 stops

16:49 - 07:00

STL

SYD

23h 11m

2 stops

$1,526United Airlines

Tue, 3 Mar - Mon, 13 Apr

06:05 - 15:28

SYD

STL

25h 23m

2 stops

18:50 - 21:40

STL

SYD

34h 50m

2 stops

$1,544Qantas Airways

Thu, 12 Mar - Thu, 19 Mar

United Airlines flights from Sydney to Illinois

Our best United Airlines deals on Sydney to Illinois flight tickets

United Airlines

3 Mar

SYD12:10Sydney Kingsford Smith

25h 16m

2 stops

STL20:26Lambert-St Louis

13 Apr

STL16:49Lambert-St Louis

23h 11m

2 stops

SYD07:00Sydney Kingsford Smith

$1,526

United Airlines

16 Feb

SYD11:50Sydney Kingsford Smith

19h 53m

1 stop

ORD14:43Chicago O'Hare Intl

4 Mar

ORD14:35Chicago O'Hare Intl

25h 30m

2 stops

SYD09:05Sydney Kingsford Smith

$1,717

United Airlines

16 Feb

SYD12:10Sydney Kingsford Smith

19h 35m

1 stop

ORD14:45Chicago O'Hare Intl

3 Mar

ORD14:35Chicago O'Hare Intl

25h 30m

2 stops

SYD09:05Sydney Kingsford Smith

$1,720

Qantas Airways flights from Sydney to Illinois

Our best Qantas Airways deals on Sydney to Illinois flight tickets

Qantas Airways

13 Feb

SYD06:30Sydney Kingsford Smith

27h 43m

2 stops

STL17:13Lambert-St Louis

19 Feb

STL18:50Lambert-St Louis

30h 00m

2 stops

SYD17:50Sydney Kingsford Smith

$1,520

Qantas Airways

12 Mar

SYD06:05Sydney Kingsford Smith

25h 23m

2 stops

STL15:28Lambert-St Louis

19 Mar

STL18:50Lambert-St Louis

34h 50m

2 stops

SYD21:40Sydney Kingsford Smith

$1,544

Qantas Airways

13 Feb

SYD17:45Sydney Kingsford Smith

23h 14m

1 stop

STL23:59Lambert-St Louis

19 Feb

STL18:50Lambert-St Louis

27h 40m

2 stops

SYD15:30Sydney Kingsford Smith

$1,599

Fly from

Fly to

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 10/3

09:55-20:23

2 stops26h 28m

Chicago O'Hare Intl

Tue 17/3

16:00-10:30

2 stops26h 30m

$1,493

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 10/3

11:45-20:23

2 stops24h 38m

Chicago O'Hare Intl

Tue 17/3

14:35-08:45

2 stops26h 10m

$1,494

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 3/3

11:20-21:12

2 stops26h 52m

Lambert-St Louis

Mon 13/4

12:27-07:05

2 stops27h 38m

$1,495

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 19/2

11:20-23:59

1 stop29h 39m

Lambert-St Louis

Mon 23/2

06:38-09:00

1 stop33h 22m

$1,500

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/2

11:20-19:29

2 stops25h 09m

Lambert-St Louis

Wed 18/2

14:31-09:00

2 stops25h 29m

$1,510

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 17/2

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Wed 4/3

15:35-09:35

1 stop25h 00m

$1,513

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 10/3

10:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Tue 17/3

10:35-08:35

2 stops30h 00m

$1,516

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Fri 13/2

06:30-17:13

2 stops27h 43m

Lambert-St Louis

Thu 19/2

18:50-17:50

2 stops30h 00m

$1,520

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Tue 3/3

12:10-20:26

2 stops25h 16m

Lambert-St Louis

Mon 13/4

16:49-07:00

2 stops23h 11m

$1,526

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

06:05-15:28

2 stops25h 23m

Lambert-St Louis

Thu 19/3

18:50-21:40

2 stops34h 50m

$1,544

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, March 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 $1,067. If you’re not able to fly to Illinois in March, then May is your next best option. Flight prices from Sydney to Illinois during May average around $1,087.

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 $1,380 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 $1,097 on momondo.

Can stopping save me money on Sydney to Illinois flights?

You could potentially save up to 65% 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	19h 45m
Direct flights	None

The fastest flight from Sydney to Illinois takes 19h 45m

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 January 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 $946	Free cancellation	Rating 7.5 978 reviews	Search Qantas Airways flights
Air Canada	PriceFrom $1,091	Free cancellation	Rating 7.1 10,666 reviews	Search Air Canada flights
American Airlines	PriceFrom $1,122	Free cancellation	Rating 7.2 11,201 reviews	Search American Airlines flights
Air New Zealand	PriceFrom $1,362	Free cancellation	Rating 8.0 577 reviews	Search Air New Zealand flights
United Airlines	PriceFrom $1,423	Free cancellation	Rating 7.4 9,213 reviews	Search United Airlines flights
ANA	PriceFrom $1,512	Free cancellation	Rating 8.4 1,078 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.

An easier way to manage your Illinois trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

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Find better results for your trip to Illinois

Popular Cities in Illinois

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Sydney flight routes

Flights from Sydney Kingsford Smith to Ballina Byron

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Flights from Sydney Kingsford Smith to Melbourne Avalon

Flights from Sydney Kingsford Smith to Maroochydore Sunshine Coast

Flights from Sydney Kingsford Smith to Launceston

Cheap flights from Sydney to Illinois from $664

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sydney to Illinois departing on 16/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Sydney to Illinois

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

United Airlines flights from Sydney to Illinois

Our best United Airlines deals on Sydney to Illinois flight tickets

Qantas Airways flights from Sydney to Illinois

Our best Qantas Airways deals on Sydney to Illinois flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Sydney to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from Sydney to Illinois

What is the cheapest month to fly to Illinois?

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

Can stopping save me money on Sydney to Illinois flights?

You could potentially save up to 65% on your flight if you consider stops on a Sydney to Illinois flight.

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

Delta and American Airlines are the most popular carriers operating from Sydney Kingsford Smith to Illinois

Which airlines fly to Illinois?

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

Direct flights

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

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

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

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

Best airlines flying from Sydney to Illinois

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

Why use momondo?

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

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

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

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

An easier way to manage your Illinois trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular Cities in Illinois

Popular flights according to clicks in the last 7 days on momondo