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 $105, while return flights cost around $210.

How much is a return flight to Illinois?

A return flight to Illinois will typically cost around $400, however they can be found for as little as $210.

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 (20 hours 56 minutes).

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).

$1,019+ 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 31 August 2026.

Sun 25/1014:00 -

2 stops32h 34m

Thu 29/1006:30 -

3 stops47h 35m

Deal found 27/8$1,371

Sun 25/1014:00 -

3 stops49h 43m

Thu 29/1006:16 -

3 stops38h 19m

Deal found 27/8$1,422

Sun 11/1014:15 -

3 stops31h 01m

Sun 18/1010:26 -

3 stops43h 59m

Deal found 28/8$1,489

Wed 7/1014:15 -

3 stops31h 02m

Fri 23/1010:26 -

3 stops34h 09m

Deal found 30/8$1,506

Thu 10/913:15 -

3 stops26h 30m

Sun 13/906:30 -

3 stops38h 20m

Deal found 28/8$1,531

Thu 19/1111:10 -

1 stop29h 48m

Tue 1/1214:48 -

1 stop23h 07m

Deal found 31/8$1,548

Tue 13/1010:10 -

1 stop29h 36m

Thu 5/1112:58 -

1 stop24h 57m

Deal found 30/8$1,618

Tue 20/1010:10 -

1 stop29h 36m

Sat 24/1008:48 -

2 stops34h 57m

Deal found 30/8$1,645

Thu 8/1013:00 -

1 stop21h 20m

Thu 15/1006:04 -

2 stops36h 26m

Deal found 27/8$1,655

Fri 9/1018:50 -

1 stop27h 44m

Sat 17/1020:01 -

1 stop43h 29m

Deal found 30/8$1,659

Fri 9/1018:50 -

1 stop27h 44m

Fri 16/1020:01 -

1 stop43h 29m

Deal found 28/8$1,682

Wed 23/909:10 -

1 stop29h 20m

Wed 30/906:30 -

1 stop33h 35m

Deal found 26/8$1,745

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 31 August 2026.

Wed 23/909:10 -

1 stop29h 20m

Wed 30/906:30 -

1 stop33h 35m

Deal found 26/8$1,745

Wed 23/910:20 -

2 stops21h 14m

Wed 30/913:29 -

2 stops26h 26m

Deal found 26/8$1,763

Sun 11/1022:05 -

2 stops51h 35m

Sun 18/1020:10 -

2 stops32h 00m

Deal found 29/8$2,028

Sun 11/1016:40 -

2 stops37h 40m

Sun 18/1020:25 -

1 stop42h 10m

Deal found 27/8$2,080

Tue 3/1115:15 -

1 stop38h 40m

Mon 9/1114:10 -

1 stop37h 40m

Deal found 26/8$2,114

Fri 25/1210:40 -

2 stops28h 11m

Thu 28/106:30 -

2 stops33h 00m

Deal found 29/8$2,209

Wed 23/909:10 -

1 stop20h 10m

Wed 30/919:03 -

1 stop21h 02m

Deal found 26/8$2,251

Thu 19/1111:20 -

3 stops27h 15m

Tue 1/1209:13 -

2 stops28h 42m

Deal found 31/8$2,279

Tue 13/1010:30 -

2 stops22h 31m

Thu 5/1113:08 -

3 stops26h 57m

Deal found 30/8$1,814

Tue 2/221:35 -

2 stops53h 25m

Wed 10/321:15 -

2 stops53h 10m

Deal found 27/8$2,059

Thu 1/1010:10 -

1 stop42h 45m

Fri 9/1016:15 -

2 stops47h 30m

Deal found 28/8$2,233

Wed 23/909:15 -

2 stops24h 18m

Wed 30/913:19 -

2 stops26h 31m

Deal found 26/8$2,260

Wed 23/909:15 -

2 stops22h 44m

Wed 30/908:05 -

2 stops31h 45m

Deal found 26/8$2,260

Fri 20/1121:35 -

2 stops53h 25m

Mon 1/220:15 -

2 stops54h 10m

Deal found 30/8$2,264

Tue 20/1010:20 -

2 stops29h 24m

Sat 24/1011:35 -

3 stops29h 00m

Deal found 30/8$2,540

Mon 23/1108:45 -

1 stop45h 10m

Wed 3/214:10 -

1 stop37h 40m

Deal found 30/8$2,342

Tue 13/1011:55 -

3 stops27h 49m

Thu 5/1107:30 -

3 stops34h 05m

Deal found 30/8$2,590

Tue 3/1121:35 -

2 stops38h 45m

Mon 9/1120:15 -

2 stops54h 10m

Deal found 26/8$2,268

Fri 11/909:15 -

2 stops28h 29m

Tue 3/1111:39 -

2 stops27h 51m

Deal found 27/8$2,353

Fri 25/1211:50 -

2 stops22h 18m

Thu 28/113:09 -

3 stops26h 56m

Deal found 29/8$2,614

Thu 5/1121:35 -

2 stops54h 25m

Mon 9/1120:15 -

2 stops54h 10m

Deal found 27/8$2,274

Thu 10/909:15 -

2 stops28h 29m

Fri 6/1111:39 -

2 stops27h 51m

Deal found 27/8$2,353

Thu 17/909:15 -

2 stops24h 18m

Wed 14/1009:29 -

2 stops30h 21m

Deal found 27/8$2,395

Tue 20/1022:05 -

3 stops39h 16m

Sat 24/1008:00 -

3 stops67h 25m

Deal found 30/8$2,657

Wed 25/1110:40 -

2 stops22h 59m

Fri 4/1211:28 -

2 stops28h 02m

Deal found 28/8$2,528

Sun 18/1010:15 -

2 stops23h 45m

Sat 31/1011:33 -

2 stops27h 57m

Deal found 29/8$2,601

Wed 4/1110:40 -

2 stops24h 20m

Mon 9/1113:31 -

2 stops25h 59m

Deal found 26/8$2,724

Sun 25/1010:15 -

2 stops22h 32m

Thu 29/1010:59 -

2 stops28h 31m

Deal found 27/8$2,731

Mon 12/1010:15 -

2 stops22h 32m

Mon 19/1013:27 -

2 stops26h 23m

Deal found 28/8$2,754

Wed 7/1010:15 -

2 stops22h 32m

Fri 23/1012:27 -

2 stops27h 23m

Deal found 30/8$2,819

Find flights to Illinois

Explore Illinois

Look for other cheap flights to Chicago

Look for other cheap flights to Springfield

Find flight deals to Illinois

Return from	$1,371
One-way from	$1,019
Popular in	May
Cheapest in	October
Average price	$1,858

25/10-29/10
5 total stops
80h 09m total
Sydney to Chicago

Search Deals

Etihad Airways
9/11
1 total stop
34h 30m total
Sydney to Illinois

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($207 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($53 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

Wed 23/9

09:10-23:30

1 stop29h 20m

Lambert-St Louis

Wed 30/9

06:30-07:05

1 stop33h 35m

$1,745

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Wed 23/9

10:20-16:34

2 stops21h 14m

Lambert-St Louis

Wed 30/9

13:29-06:55

2 stops26h 26m

$1,763

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Tue 13/10

10:30-17:01

2 stops22h 31m

Lambert-St Louis

Thu 5/11

13:08-09:05

3 stops26h 57m

$1,814

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sun 11/10

22:05-09:40

2 stops51h 35m

Chicago O'Hare Intl

Sun 18/10

20:10-20:10

2 stops32h 00m

$2,028

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Tue 2/2

21:35-10:00

2 stops53h 25m

Chicago O'Hare Intl

Wed 10/3

21:15-19:25

2 stops53h 10m

$2,059

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Sun 11/10

16:40-14:20

2 stops37h 40m

Chicago O'Hare Intl

Sun 18/10

20:25-06:35

1 stop42h 10m

$2,080

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Tue 3/11

15:15-12:55

1 stop38h 40m

Chicago O'Hare Intl

Mon 9/11

14:10-20:50

1 stop37h 40m

$2,114

SydneySt. Louis

SYD Sydney Kingsford Smith - STL Lambert-St Louis

SYDSTL

Sydney Kingsford Smith

Fri 25/12

10:40-21:51

2 stops28h 11m

Lambert-St Louis

Thu 28/1

06:30-08:30

2 stops33h 00m

$2,209

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Thu 1/10

10:10-13:55

1 stop42h 45m

Chicago O'Hare Intl

Fri 9/10

16:15-07:45

2 stops47h 30m

$2,233

Fastest return journey

SydneyChicago

SYD Sydney Kingsford Smith - ORD Chicago O'Hare Intl

SYDORD

Sydney Kingsford Smith

Wed 23/9

09:10-14:20

1 stop20h 10m

Chicago O'Hare Intl

Wed 30/9

19:03-07:05

1 stop21h 02m

$2,251

Flights are sorted by cheapest return flights first.

Deals found on 29/8

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-STL

SYD-ORD

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-STL

SYD-ORD

SYD-MDW

How long is the flight to Illinois?

On average, a flight from Sydney to Illinois takes 24 hours 9 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 86 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

665 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

665 reviews

Air New Zealand

8.0

Very Good

665 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

1,087 reviews

Air New Zealand

8.0

Very Good

665 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

10,148 reviews

Air New Zealand

8.0

Very Good

665 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

12,021 reviews

Air New Zealand

8.0

Very Good

665 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

11,559 reviews

Air New Zealand

8.0

Very Good

665 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 $105, while return flights cost around $210.
How much is a return flight to Illinois?
A return flight to Illinois will typically cost around $400, however they can be found for as little as $210.
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 (20 hours 56 minutes).
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

Flights to Bloomington

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Flights to Belleville

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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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$1,019+ 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 9/11. 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 31 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 31 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 31 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 31 August 2026.

Last-minute flights to IllinoisDiscover last-minute flight deals to Illinois. Data last updated 31 August 2026 and is based on user searches.

Discover last-minute flight deals to Illinois. Data last updated 31 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 31 August 2026.

Search for one-way flight options to Illinois. Find affordable one-way fares based on user searches. Data last updated 31 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 31 August 2026

Explore Illinois

Find flight deals to Illinois

Return from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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 24 hours 9 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 86 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?

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 31 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

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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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 31 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 31 August 2026.

Last-minute flights to Illinois
Discover last-minute flight deals to Illinois. Data last updated 31 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 31 August 2026.