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

Air New Zealand, Air Canada, and United 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 63% 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 October 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.

$699 Cheap Flights from Sydney to Illinois in 2025/26

1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

11:20 - 14:41SYD-ORD

20h 21m1 stop

13:00 - 08:35ORD-SYD

27h 35m1 stop

$1,325Air Canada

Find Deal

Thu, 5 Mar - Thu, 12 Mar

10:25 - 15:29SYD-STL

45h 04m2 stops

15:00 - 08:35STL-SYD

25h 35m2 stops

$1,337Air Canada

Find Deal

Thu, 12 Mar - Mon, 16 Mar

09:55 - 19:30SYD-ORD

26h 35m2 stops

10:38 - 10:30ORD-SYD

30h 52m2 stops

$1,428Air New Zealand

Find Deal

Tue, 18 Nov - Wed, 3 Dec

11:45 - 19:30SYD-ORD

24h 45m2 stops

12:45 - 10:30ORD-SYD

28h 45m2 stops

$1,433Air New Zealand

Find Deal

Wed, 19 Nov - Thu, 4 Dec

11:20 - 15:55SYD-ORD

21h 35m1 stop

18:23 - 09:00ORD-SYD

21h 37m1 stop

$1,437Qantas Airways

Find Deal

Wed, 12 Nov - Mon, 1 Dec

11:50 - 17:39SYD-STL

22h 49m2 stops

11:20 - 07:00STL-SYD

26h 40m1 stop

$1,509United Airlines

Find Deal

Mon, 24 Nov - Sun, 30 Nov

12:10 - 14:53SYD-ORD

19h 43m1 stop

21:05 - 07:00ORD-SYD

40h 55m1 stop

$1,511United Airlines

Find Deal

Tue, 27 Jan - Sat, 31 Jan

11:20 - 15:55SYD-ORD

21h 35m1 stop

11:45 - 09:00ORD-SYD

28h 15m1 stop

$1,596Qantas Airways

Find Deal

Tue, 18 Nov - Wed, 3 Dec

21:45 - 05:16SYD-ORD

48h 31m2 stops

16:25 - 20:15ORD-SYD

34h 50m1 stop

$1,777ANA

Find Deal

Tue, 18 Nov - Wed, 3 Dec

12:25 - 05:15SYD-ORD

33h 50m2 stops

16:25 - 20:15ORD-SYD

34h 50m1 stop

$1,853ANA

Find Deal

Fri, 23 Jan - Sun, 22 Feb

Air New Zealand flights from Sydney to Illinois

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

Air New Zealand

18 Nov

SYD09:55Sydney Kingsford Smith

26h 35m

2 stops

ORD19:30Chicago O'Hare Intl

3 Dec

ORD10:38Chicago O'Hare Intl

30h 52m

2 stops

SYD10:30Sydney Kingsford Smith

$1,428

Find similar

Air New Zealand

19 Nov

SYD11:45Sydney Kingsford Smith

24h 45m

2 stops

ORD19:30Chicago O'Hare Intl

4 Dec

ORD12:45Chicago O'Hare Intl

28h 45m

2 stops

SYD10:30Sydney Kingsford Smith

$1,433

Find similar

Air New Zealand

23 Jan

SYD11:45Sydney Kingsford Smith

25h 06m

2 stops

ORD19:51Chicago O'Hare Intl

22 Feb

ORD14:33Chicago O'Hare Intl

26h 57m

2 stops

SYD10:30Sydney Kingsford Smith

$1,565

Find similar

ANA flights from Sydney to Illinois

Our best ANA deals on Sydney to Illinois flight tickets

ANA

18 Nov

SYD21:45Sydney Kingsford Smith

48h 31m

2 stops

ORD05:16Chicago O'Hare Intl

3 Dec

ORD16:25Chicago O'Hare Intl

34h 50m

1 stop

SYD20:15Sydney Kingsford Smith

$1,777

Find similar

ANA

23 Jan

SYD12:25Sydney Kingsford Smith

33h 50m

2 stops

ORD05:15Chicago O'Hare Intl

22 Feb

ORD16:25Chicago O'Hare Intl

34h 50m

1 stop

SYD20:15Sydney Kingsford Smith

$1,853

Find similar

ANA

3 Nov

SYD12:25Sydney Kingsford Smith

33h 51m

2 stops

ORD05:16Chicago O'Hare Intl

17 Nov

ORD16:25Chicago O'Hare Intl

34h 50m

1 stop

SYD20:15Sydney Kingsford Smith

$2,022

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Thu 5/3

11:20-14:41

1 stop20h 21m

Chicago O'Hare Intl

Thu 12/3

13:00-08:35

1 stop27h 35m

$1,325

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Thu 12/3

10:25-15:29

2 stops45h 04m

Lambert-St Louis

Mon 16/3

15:00-08:35

2 stops25h 35m

$1,337

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 18/11

09:55-19:30

2 stops26h 35m

Chicago O'Hare Intl

Wed 3/12

10:38-10:30

2 stops30h 52m

$1,428

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 19/11

11:45-19:30

2 stops24h 45m

Chicago O'Hare Intl

Thu 4/12

12:45-10:30

2 stops28h 45m

$1,433

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Wed 12/11

11:20-15:55

1 stop21h 35m

Chicago O'Hare Intl

Mon 1/12

18:23-09:00

1 stop21h 37m

$1,437

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 24/11

11:50-17:39

2 stops22h 49m

Lambert-St Louis

Sun 30/11

11:20-07:00

1 stop26h 40m

$1,509

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 27/1

12:10-14:53

1 stop19h 43m

Chicago O'Hare Intl

Sat 31/1

21:05-07:00

1 stop40h 55m

$1,511

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 18/11

11:20-15:55

1 stop21h 35m

Chicago O'Hare Intl

Wed 3/12

11:45-09:00

1 stop28h 15m

$1,596

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Tue 18/11

21:45-05:16

2 stops48h 31m

Chicago O'Hare Intl

Wed 3/12

16:25-20:15

1 stop34h 50m

$1,777

SydneyChicago

SYD - ORD

SYDORD

Sydney Kingsford Smith

Fri 23/1

12:25-05:15

2 stops33h 50m

Chicago O'Hare Intl

Sun 22/2

16:25-20:15

1 stop34h 50m

$1,853

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 $1,119. 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 $1,125.

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 $1,710. 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 $2,013. 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 $1,707. 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 $1,888. 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 $1,482 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 $1,182 on momondo.

Can stopping save me money on Sydney to Illinois flights?

You could potentially save up to 56% 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

Direct flights	None

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 October 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 $1,001	Free cancellation	Rating 7.5 926 reviews	Search Qantas Airways flights
American Airlines	PriceFrom $1,188	Free cancellation	Rating 7.2 11,031 reviews	Search American Airlines flights
Air Canada	PriceFrom $1,202	Free cancellation	Rating 7.1 10,387 reviews	Search Air Canada flights
Air New Zealand	PriceFrom $1,516	Free cancellation	Rating 8.0 520 reviews	Search Air New Zealand flights
ANA	PriceFrom $1,600	Free cancellation	Rating 8.4 999 reviews	Search ANA flights
United Airlines	PriceFrom $1,652	Free cancellation	Rating 7.4 8,995 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.

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Sun 30/11

Sun 7/12

Email me momondo's favourite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular Cities in Illinois

Look for other cheap flights to Los Angelesfrom $958

Look for other cheap flights to New Yorkfrom $1,326

Look for other cheap flights to San Franciscofrom $1,089

Look for other cheap flights to Honolulufrom $763

Look for other cheap flights to Las Vegasfrom $1,110

Look for other cheap flights to Miamifrom $1,511

Look for other cheap flights to Orlandofrom $1,410

Look for other cheap flights to Chicagofrom $1,413

Look for other cheap flights to Dallasfrom $1,447

Look for other cheap flights to Washington, D.C.from $1,418

Look for other cheap flights to Bostonfrom $1,410

Look for other cheap flights to Seattlefrom $1,154

Sydney flight routes

Flights from Sydney Kingsford Smith to Ballina Byron

Flights from Sydney Kingsford Smith to Maroochydore Sunshine Coast

Flights from Sydney Kingsford Smith to Melbourne Avalon

Flights from Sydney Kingsford Smith to Coolangatta Gold Coast

Flights from Sydney Kingsford Smith to Proserpine Whitsunday Coast

Flights from Sydney Kingsford Smith to Launceston

Cheap flights from Sydney to Illinois from $699

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 5/11. 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

ANA flights from Sydney to Illinois

Our best ANA 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

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 56% 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?

Air New Zealand, Air Canada, and United 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

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