Can I find cheaper flights to Illinois if I am willing to have stopovers?

Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Illinois on Cheapflights that require 1 or 2 stops for potential cost savings.

What is the best airline to fly to Illinois?

Based on reviews from Cheapflights users, American Airlines is rated the highest out of the airlines that fly to Illinois.

What is the cheapest airport to fly to in Illinois?

Chicago O'Hare Intl is currently the cheapest airport to fly to in Illinois. One-way flights to Chicago O'Hare Intl typically cost $106, while return flights cost around $212.

How much is a return flight to Illinois?

A return flight to Illinois will typically cost around $403, however they can be found for as little as $212.

Where does the fastest flight to Illinois depart from?

For those looking to save time traveling to Illinois, Sydney Kingsford Smith offers the quickest one-way flight (19 hours 40 minutes).

Which airport is closest to Chicago History Museum?

f being close to Chicago History Museum is important to you, you’ll want to land at Chicago O'Hare Intl Airport.

Does Chicago O'Hare Intl have car hire?

Yes. Those touching down at Chicago O'Hare Intl can take advantage of the car hire services offered upon their arrival.

Are there hotels close to Chicago O'Hare Intl?

Yes. Chicago O'Hare Intl has hotels nearby for those requiring accommodations. Hilton Chicago O'Hare Airport is the closest property to Chicago O'Hare Intl (0.0 km away from Chicago O'Hare Intl).

$838+ Cheap Flights to Illinois

Flights to Illinois in 2026

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights to Illinois
Explore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 19 August 2026.

Tue 8/913:15 -

2 stops32h 02m

Tue 22/906:30 -

3 stops48h 55m

Deal found 16/8$1,159

Thu 3/909:30 -

2 stops48h 32m

Wed 16/906:30 -

2 stops33h 30m

Deal found 18/8$1,531

Mon 2/1111:20 -

2 stops23h 55m

Tue 17/1106:02 -

1 stop33h 58m

Deal found 14/8$1,659

Mon 2/1114:05 -

1 stop23h 14m

Mon 16/1106:02 -

1 stop33h 58m

Deal found 14/8$1,671

Mon 31/806:25 -

2 stops24h 29m

Tue 15/921:10 -

2 stops57h 05m

Deal found 16/8$1,718

Tue 17/1111:20 -

2 stops23h 34m

Tue 1/1214:54 -

2 stops25h 06m

Deal found 15/8$1,728

Tue 17/1114:05 -

1 stop23h 14m

Tue 1/1214:54 -

1 stop23h 01m

Deal found 15/8$1,731

Tue 8/909:55 -

2 stops28h 10m

Tue 22/916:00 -

2 stops25h 45m

Deal found 16/8$1,731

Tue 3/1111:20 -

2 stops23h 34m

Thu 26/1114:54 -

2 stops25h 06m

Deal found 15/8$1,734

Wed 4/1111:50 -

2 stops26h 59m

Mon 9/1110:34 -

2 stops31h 01m

Deal found 18/8$1,752

Tue 17/1111:20 -

2 stops22h 39m

Tue 1/1213:08 -

3 stops26h 57m

Deal found 15/8$1,754

Sun 30/809:30 -

1 stop35h 29m

Tue 15/906:30 -

2 stops33h 30m

Deal found 19/8$1,778

Best flights to Illinois
Discover carefully curated flight deals to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 August 2026.

Tue 26/111:20 -

1 stop29h 39m

Sat 30/110:12 -

2 stops32h 33m

Deal found 18/8$1,611

Tue 17/1111:50 -

2 stops23h 19m

Tue 1/1213:08 -

3 stops26h 57m

Deal found 18/8$1,761

Tue 8/911:55 -

2 stops28h 04m

Sat 26/916:11 -

2 stops24h 34m

Deal found 14/8$1,925

Tue 8/910:10 -

1 stop43h 10m

Sat 26/916:15 -

1 stop36h 55m

Deal found 14/8$2,125

Mon 1/209:55 -

3 stops28h 18m

Thu 25/207:33 -

3 stops32h 02m

Deal found 15/8$2,137

Wed 4/1110:40 -

2 stops23h 07m

Wed 11/1113:22 -

2 stops26h 08m

Deal found 18/8$2,449

Mon 1/211:20 -

2 stops22h 06m

Thu 25/213:08 -

3 stops26h 57m

Deal found 15/8$1,810

Mon 2/1109:55 -

3 stops26h 27m

Mon 16/1114:28 -

2 stops25h 32m

Deal found 14/8$2,148

Thu 5/1115:15 -

1 stop38h 40m

Mon 9/1114:35 -

1 stop37h 15m

Deal found 18/8$2,154

Mon 7/909:10 -

2 stops24h 19m

Tue 22/915:00 -

2 stops25h 05m

Deal found 14/8$2,227

Mon 2/1110:25 -

3 stops25h 57m

Tue 17/1114:28 -

2 stops22h 57m

Deal found 14/8$2,149

Fri 6/1108:45 -

1 stop45h 10m

Thu 12/1114:35 -

1 stop37h 15m

Deal found 18/8$2,207

Mon 2/1110:40 -

2 stops23h 07m

Mon 9/1113:22 -

2 stops26h 08m

Deal found 18/8$2,449

Mon 7/910:20 -

1 stop21h 16m

Tue 22/915:56 -

2 stops24h 04m

Deal found 16/8$2,259

Tue 8/910:10 -

1 stop43h 10m

Sat 26/916:15 -

2 stops37h 05m

Deal found 14/8$2,166

Thu 1/1009:10 -

2 stops22h 30m

Thu 8/1015:20 -

1 stop23h 35m

Deal found 17/8$2,456

Thu 1/1010:10 -

1 stop42h 45m

Thu 8/1016:15 -

2 stops34h 20m

Deal found 17/8$2,173

Thu 5/1110:40 -

2 stops23h 07m

Tue 10/1113:22 -

2 stops26h 08m

Deal found 18/8$2,682

Thu 7/111:20 -

2 stops27h 46m

Sun 31/113:08 -

3 stops26h 57m

Deal found 15/8$2,630

Tue 8/910:10 -

1 stop43h 10m

Tue 22/916:15 -

2 stops33h 10m

Deal found 16/8$2,178

Tue 3/1110:40 -

2 stops23h 07m

Sun 8/1113:27 -

2 stops26h 03m

Deal found 18/8$2,682

Tue 3/1109:55 -

3 stops26h 27m

Thu 26/1114:23 -

2 stops25h 37m

Deal found 15/8$2,224

Mon 28/909:15 -

2 stops38h 33m

Mon 5/1006:05 -

2 stops33h 45m

Deal found 14/8$2,730

Thu 3/919:45 -

2 stops33h 35m

Wed 16/916:15 -

1 stop36h 55m

Deal found 16/8$2,244

Fri 25/909:15 -

2 stops24h 04m

Sun 4/1013:19 -

2 stops26h 31m

Deal found 15/8$2,811

Thu 10/920:45 -

2 stops35h 25m

Fri 18/918:08 -

2 stops33h 42m

Deal found 18/8$2,338

Mon 7/909:15 -

2 stops24h 18m

Sun 20/914:00 -

2 stops25h 50m

Deal found 14/8$2,879

Tue 8/909:15 -

2 stops24h 04m

Tue 22/913:19 -

2 stops26h 31m

Deal found 15/8$2,887

Fri 4/920:45 -

2 stops35h 25m

Fri 18/918:08 -

2 stops33h 42m

Deal found 16/8$2,417

Mon 7/909:15 -

2 stops23h 46m

Tue 22/913:00 -

2 stops26h 50m

Deal found 15/8$2,887

Find flights to Illinois

One-wayReturn

Explore Illinois

Look for other cheap flights to Chicago

Look for other cheap flights to Bloomington

Look for other cheap flights to St. Louis

Find flight deals to Illinois

Return from	$1,159
One-way from	$838
Popular in	July
Cheapest in	October
Average price	$1,617

8/9-22/9
5 total stops
80h 57m total
Sydney to Chicago

Search Deals

21/10
3 total stops
50h 19m total
Sydney to Illinois

Search Deals

Highest demand for flights based on searches. 4% potential increase in price ($78 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($24 potential savings vs. average return price).

Search Deals

Average for return flights in August 2026

Search Deals

Fly from

Route

Depart

Return

Price

Cheapest return flight

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 26/1

11:20-23:59

1 stop29h 39m

Lambert-St Louis

Sat 30/1

10:12-11:45

2 stops32h 33m

$1,611

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 17/11

11:50-18:09

2 stops23h 19m

Lambert-St Louis

Tue 1/12

13:08-09:05

3 stops26h 57m

$1,761

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 1/2

11:20-16:26

2 stops22h 06m

Lambert-St Louis

Thu 25/2

13:08-09:05

3 stops26h 57m

$1,810

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Tue 8/9

11:55-00:59

2 stops28h 04m

Chicago O'Hare Intl

Sat 26/9

16:11-07:45

2 stops24h 34m

$1,925

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Tue 8/9

10:10-14:20

1 stop43h 10m

Chicago O'Hare Intl

Sat 26/9

16:15-20:10

1 stop36h 55m

$2,125

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 1/2

09:55-21:13

3 stops28h 18m

Lambert-St Louis

Thu 25/2

07:33-08:35

3 stops32h 02m

$2,137

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 2/11

09:55-19:22

3 stops26h 27m

Lambert-St Louis

Mon 16/11

14:28-09:00

2 stops25h 32m

$2,148

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Mon 2/11

10:25-19:22

3 stops25h 57m

Lambert-St Louis

Tue 17/11

14:28-06:25

2 stops22h 57m

$2,149

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 5/11

15:15-12:55

1 stop38h 40m

Chicago O'Hare Intl

Mon 9/11

14:35-20:50

1 stop37h 15m

$2,154

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Tue 8/9

10:10-14:20

1 stop43h 10m

Chicago O'Hare Intl

Sat 26/9

16:15-20:20

2 stops37h 05m

$2,166

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Showing 1-10 of 31 resultsSorted by cheapest first

Best time to book a flight to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois with our price prediction graph.

SYD-ORD

SYD-STL

SYD-MDW

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight to Illinois

SYD-USIL

SYD-ORD

SYD-STL

SYD-MDW

How long is the flight to Illinois?

On average, a flight from Sydney to Illinois takes 21 hours 0 minutes. Flights to Illinois from other popular cities in Australia will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to Illinois?

The most popular airlines flying from Sydney to Illinois are Qantas Airways, Air Canada and United Airlines.

What are the cheapest airlines that fly to Illinois?

The cheapest airlines flying from Sydney to Illinois are American Airlines, Air Canada and Qantas Airways.

Rainfall in Illinois by month

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 mm per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

Temperature in Illinois by month

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

When is the best time to book a flight to Illinois?

To ensure you get the cheapest price possible for a flight to Illinois, you should look to book at least 85 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Illinois

Read through reviews of airlines serving the United States, such as Air New Zealand,Qantas Airways, andUnited Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Air New Zealand

8.0

Very Good

662 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

Air New Zealand

8.0

Very Good

662 reviews

Air New Zealand

8.0

Very Good

662 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

Qantas Airways

7.5

Good

1,083 reviews

Air New Zealand

8.0

Very Good

662 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

United Airlines

7.4

Good

10,104 reviews

Air New Zealand

8.0

Very Good

662 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

American Airlines

7.1

Good

11,965 reviews

Air New Zealand

8.0

Very Good

662 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

Air Canada

7.1

Good

11,505 reviews

Air New Zealand

8.0

Very Good

662 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Viren,June 2026

MEL - LAX

Flight got delayed and made us take a transit visa which was not a told before hand.

FAQs about flying to Illinois

Can I find cheaper flights to Illinois if I am willing to have stopovers?
Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Illinois on Cheapflights that require 1 or 2 stops for potential cost savings.
What is the best airline to fly to Illinois?
Based on reviews from Cheapflights users, American Airlines is rated the highest out of the airlines that fly to Illinois.
What is the cheapest airport to fly to in Illinois?
Chicago O'Hare Intl is currently the cheapest airport to fly to in Illinois. One-way flights to Chicago O'Hare Intl typically cost $106, while return flights cost around $212.
How much is a return flight to Illinois?
A return flight to Illinois will typically cost around $403, however they can be found for as little as $212.
Where does the fastest flight to Illinois depart from?
For those looking to save time traveling to Illinois, Sydney Kingsford Smith offers the quickest one-way flight (19 hours 40 minutes).
Which airport is closest to Chicago History Museum?
f being close to Chicago History Museum is important to you, you’ll want to land at Chicago O'Hare Intl Airport.
Does Chicago O'Hare Intl have car hire?
Yes. Those touching down at Chicago O'Hare Intl can take advantage of the car hire services offered upon their arrival.
Are there hotels close to Chicago O'Hare Intl?
Yes. Chicago O'Hare Intl has hotels nearby for those requiring accommodations. Hilton Chicago O'Hare Airport is the closest property to Chicago O'Hare Intl (0.0 km away from Chicago O'Hare Intl).

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top Illinois destinations

Popular flights to Illinois cities

Complete your trip

United States flights

Popular routes from Illinois

Flights by cabin class

Popular flights

Popular destinations

Popular routes

Popular United States flight routes

Airlines

Find flights to Illinois

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Flights to Midway

Flights to Moline

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Flights to Belleville

Flights to Chicago

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How does Cheapflights help users find flights to Illinois?

Cheapflights helps you search for flights to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets to Illinois?

Cheapflights helps you find that perfect flight to Illinois by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights to Illinois with no change fees?

Certainly. Search results for flights to Illinois shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights to Illinois become cheaper?

Yes! Start tracking prices for Illinois flights today and get alerted when prices change. To subscribe and begin receiving alerts, click the bell icon next to the flight deals above and provide your email address.

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$838+ Cheap flights to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/10. Fares are subject to change and may not be available on all flights or dates of travel.

Flights to Illinois in 2026

Cheapest flights to IllinoisExplore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 19 August 2026.

Explore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 19 August 2026.

Best flights to IllinoisDiscover carefully curated flight deals to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 August 2026.

Discover carefully curated flight deals to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 August 2026.

Last-minute flights to IllinoisDiscover last-minute flight deals to Illinois. Data last updated 19 August 2026 and is based on user searches.

Discover last-minute flight deals to Illinois. Data last updated 19 August 2026 and is based on user searches.

One-way flights to IllinoisSearch for one-way flight options to Illinois. Find affordable one-way fares based on user searches. Data last updated 19 August 2026.

Search for one-way flight options to Illinois. Find affordable one-way fares based on user searches. Data last updated 19 August 2026.

Find flights to Illinois

Browse one-way and return flights deals to Illinois on Cheapflights. Flight deals are based on user searches and were last updated on 19 August 2026

Explore Illinois

Find flight deals to Illinois

Return from

One-way from

Popular in

Cheapest in

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

Best time to book a flight to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois with our price prediction graph.

Cheapflights Insights

How long is the flight to Illinois?

On average, a flight from Sydney to Illinois takes 21 hours 0 minutes. Flights to Illinois from other popular cities in Australia will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to Illinois?

The most popular airlines flying from Sydney to Illinois are Qantas Airways, Air Canada and United Airlines.

What are the cheapest airlines that fly to Illinois?

The cheapest airlines flying from Sydney to Illinois are American Airlines, Air Canada and Qantas Airways.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 43.0 - 125.0 mm per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Illinois when rainfall is around 43.0 mm.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

When is the best time to book a flight to Illinois?

To ensure you get the cheapest price possible for a flight to Illinois, you should look to book at least 85 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Illinois

Read through reviews of airlines serving the United States, such as Air New Zealand,Qantas Airways, andUnited Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

FAQs about flying to Illinois

Can I find cheaper flights to Illinois if I am willing to have stopovers?

What is the best airline to fly to Illinois?

What is the cheapest airport to fly to in Illinois?

How much is a return flight to Illinois?

Where does the fastest flight to Illinois depart from?

Which airport is closest to Chicago History Museum?

Does Chicago O'Hare Intl have car hire?

Are there hotels close to Chicago O'Hare Intl?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Find flights to Illinois

Select your preferred flight destination in Illinois from the list below.

Domestic flights to Illinois

The most popular flights to Illinois we’ve come across at this time.

Complete your trip

Complete your trip to Illinois by booking a hire car and/or hotel room.

Popular places in United States

Not sure where to visit in United States? Start by selecting one of the most popular places in United States below to filter down your possible destination.

Popular flight routes departing from Illinois

Check out these popular flight routes departing from from Illinois. Flights updated 19 August 2026.

Search flights to Illinois by cabin class

Find flights to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Browse our most popular destinations

Most traveled routes by our users

Popular United States flight routes

Browse through the most popular flight routes to the United States at this time.

Fly your favourite airline to Illinois

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How does Cheapflights help users find flights to Illinois?

Why should you use Cheapflights to find cheap flight tickets to Illinois?

Can Cheapflights find flights to Illinois with no change fees?

Can Cheapflights notify me if prices for flights to Illinois become cheaper?

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Cheapest flights to Illinois
Explore the most affordable flight options available to Illinois. Find the lowest fares based on data from user searches, with prices last updated on 19 August 2026.

Best flights to Illinois
Discover carefully curated flight deals to Illinois that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 August 2026.

Last-minute flights to Illinois
Discover last-minute flight deals to Illinois. Data last updated 19 August 2026 and is based on user searches.

One-way flights to Illinois
Search for one-way flight options to Illinois. Find affordable one-way fares based on user searches. Data last updated 19 August 2026.