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

Etihad Airways, American Airlines, and Delta 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 67% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 7 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 7 as of August 2025.

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.

$662 Cheap Flights from Sydney to Illinois in 2025

1 adult

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Find the cheapest flights from Sydney to Illinois

Round-trip

One-way

Last minute

Cheap return flights

10:20 - 14:41SYD-ORD

20h 21m1 stop

15:40 - 08:35ORD-SYD

24h 55m1 stop

$1,202Air Canada

Find Deal

Tue, 28 Oct - Thu, 30 Oct

10:20 - 16:44SYD-ORD

22h 24m1 stop

08:00 - 08:35ORD-SYD

32h 35m2 stops

$1,212Air Canada

Find Deal

Tue, 28 Oct - Thu, 30 Oct

10:20 - 16:45SYD-STL

21h 25m1 stop

16:48 - 07:00STL-SYD

21h 12m1 stop

$1,282United Airlines

Find Deal

Mon, 18 Aug - Sat, 8 Nov

10:20 - 16:45SYD-STL

21h 25m1 stop

08:20 - 07:00STL-SYD

29h 40m1 stop

$1,284United Airlines

Find Deal

Mon, 18 Aug - Sat, 8 Nov

09:55 - 05:01SYD-ORD

34h 06m2 stops

14:25 - 10:35ORD-SYD

29h 10m2 stops

$1,610Air New Zealand

Find Deal

Mon, 1 Sep - Wed, 24 Sep

11:50 - 22:59SYD-ORD

26h 09m2 stops

15:35 - 10:35ORD-SYD

28h 00m2 stops

$1,611Air New Zealand

Find Deal

Sat, 16 Aug - Mon, 25 Aug

11:50 - 08:40SYD-ORD

35h 50m1 stop

20:20 - 19:15ORD-SYD

31h 55m2 stops

$1,718ANA

Find Deal

Tue, 2 Sep - Tue, 23 Sep

12:25 - 05:16SYD-ORD

32h 51m2 stops

17:35 - 20:15ORD-SYD

34h 40m1 stop

$1,737ANA

Find Deal

Tue, 28 Oct - Thu, 30 Oct

12:10 - 19:12SYD-ORD

22h 02m1 stop

17:46 - 07:05ORD-SYD

22h 19m1 stop

$1,771Qantas Airways

Find Deal

Mon, 1 Sep - Wed, 24 Sep

17:45 - 22:59SYD-STL

20h 14m1 stop

06:20 - 07:30STL-SYD

34h 10m1 stop

$2,075Qantas Airways

Find Deal

Thu, 18 Sep - Thu, 25 Sep

Air New Zealand flights from Sydney to Illinois

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

Air New Zealand

1 Sept

SYD09:55Sydney Kingsford Smith

34h 06m

2 stops

ORD05:01Chicago O'Hare Intl

24 Sept

ORD14:25Chicago O'Hare Intl

29h 10m

2 stops

SYD10:35Sydney Kingsford Smith

$1,610

Find similar

Air New Zealand

16 Aug

SYD11:50Sydney Kingsford Smith

26h 09m

2 stops

ORD22:59Chicago O'Hare Intl

25 Aug

ORD15:35Chicago O'Hare Intl

28h 00m

2 stops

SYD10:35Sydney Kingsford Smith

$1,611

Find similar

Air New Zealand

20 Aug

SYD11:50Sydney Kingsford Smith

26h 25m

2 stops

ORD23:15Chicago O'Hare Intl

23 Aug

ORD16:10Chicago O'Hare Intl

25h 35m

2 stops

SYD08:45Sydney Kingsford Smith

$1,622

Find similar

Qantas Airways flights from Sydney to Illinois

Our best Qantas Airways deals on Sydney to Illinois flight tickets

Qantas Airways

1 Sept

SYD12:10Sydney Kingsford Smith

22h 02m

1 stop

ORD19:12Chicago O'Hare Intl

24 Sept

ORD17:46Chicago O'Hare Intl

22h 19m

1 stop

SYD07:05Sydney Kingsford Smith

$1,771

Find similar

Qantas Airways

18 Sept

SYD17:45Sydney Kingsford Smith

20h 14m

1 stop

STL22:59Lambert-St Louis

25 Sept

STL06:20Lambert-St Louis

34h 10m

1 stop

SYD07:30Sydney Kingsford Smith

$2,075

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 28/10

10:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Thu 30/10

15:40-08:35

1 stop24h 55m

$1,202

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 28/10

10:20-16:44

1 stop22h 24m

Chicago O'Hare Intl

Thu 30/10

08:00-08:35

2 stops32h 35m

$1,212

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

10:20-16:45

1 stop21h 25m

Lambert-St Louis

Sat 8/11

16:48-07:00

1 stop21h 12m

$1,282

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 18/8

10:20-16:45

1 stop21h 25m

Lambert-St Louis

Sat 8/11

08:20-07:00

1 stop29h 40m

$1,284

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 1/9

09:55-05:01

2 stops34h 06m

Chicago O'Hare Intl

Wed 24/9

14:25-10:35

2 stops29h 10m

$1,610

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Sat 16/8

11:50-22:59

2 stops26h 09m

Chicago O'Hare Intl

Mon 25/8

15:35-10:35

2 stops28h 00m

$1,611

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 2/9

11:50-08:40

1 stop35h 50m

Chicago O'Hare Intl

Tue 23/9

20:20-19:15

2 stops31h 55m

$1,718

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 28/10

12:25-05:16

2 stops32h 51m

Chicago O'Hare Intl

Thu 30/10

17:35-20:15

1 stop34h 40m

$1,737

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Mon 1/9

12:10-19:12

1 stop22h 02m

Chicago O'Hare Intl

Wed 24/9

17:46-07:05

1 stop22h 19m

$1,771

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 18/9

17:45-22:59

1 stop20h 14m

Lambert-St Louis

Thu 25/9

06:20-07:30

1 stop34h 10m

$2,075

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, February 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 $1,155. If you’re not able to fly to Illinois in February, then May is your next best option. Flight prices from Sydney to Illinois during May average around $1,157.

What is the cheapest day to depart on your flight to Illinois?

On average, the least expensive day to fly to Illinois from Sydney is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $1,736. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $2,044. These prices are subject to change though, so be sure to set up a Price Alert for flights to Illinois.

What is the cheapest time of day to depart on your flight to Illinois?

According to our data, the cheapest time of day to fly to Illinois is in the afternoon. momondo users have found flights departing from Sydney to Illinois in the afternoon for as low as $1,733. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Illinois are more costly in the morning, with an average ticket price of $1,918. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,596 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 $1,299 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

Best price found	$662
Fastest flight time	19h 34m
Direct flights	None
Airports in Illinois	3 airports

The best one-way flight to Illinois from Sydney in the past 72 hours is $662. The best return flight deal from Sydney to Illinois found on momondo in the last 72 hours is $1,202.

The fastest flight from Sydney to Illinois takes 19h 34m

There are no direct flights from Sydney to Illinois. Popular non-direct routes for this connection are Sydney Kingsford Smith Airport - Chicago Midway Airport, Sydney Kingsford Smith Airport - Chicago O'Hare Intl Airport and Sydney Kingsford Smith Airport - Lambert-St Louis Airport.

There are 3 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL)

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 7 as of August 2025.
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 $1,021	Free cancellation	Rating 7.5 887 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $1,206	Free cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Air Canada	PriceFrom $1,278	Free cancellation	Rating 7.1 9,890 reviews	Search Air Canada flights
Air New Zealand	PriceFrom $1,576	Free cancellation	Rating 7.9 502 reviews	Search Air New Zealand flights
ANA	PriceFrom $1,625	Free cancellation	Rating 8.4 924 reviews	Search ANA flights
United Airlines	PriceFrom $1,708	Free cancellation	Rating 7.4 8,916 reviews	Search United Airlines flights
Virgin Australia	PriceFrom $1,782	Free cancellation	Rating 7.5 411 reviews	Search Virgin Australia 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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Cheap flights from Sydney to Illinois from $662

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 15/10. 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

Air New Zealand flights from Sydney to Illinois

Our best Air New Zealand 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

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

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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

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight 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 1% 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?

Etihad Airways, American Airlines, and Delta 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

Best price found

Fastest flight time

Direct flights

Airports in Illinois

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