Latest deals
Insights
FAQs
Price Alerts
Look for other cheap flights to Illinois

$969 Cheap flights to Illinois

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight to Illinois departing on 5/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

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

Trusted and free

Trusted and free

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

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Recent flights found to popular cities in Illinois

Find flights to these popular cities in Illinois from your nearest airport.

Flights to Chicago

Search all flight deals to Chicago
Air Canada
5 Mar
BNE
25h 15m
1 stop
ORD
19 Mar
ORD
33h 30m
2 stops
BNE
$969
Air Canada
22 Apr
BNE
22h 01m
2 stops
ORD
29 Apr
ORD
31h 25m
2 stops
BNE
$977
Air Canada
3 Mar
BNE
19h 56m
1 stop
ORD
10 Mar
ORD
25h 10m
1 stop
BNE
$994
Air Canada
5 Mar
BNE
19h 56m
1 stop
ORD
19 Mar
ORD
25h 10m
1 stop
BNE
$995
Air Canada
5 Mar
BNE
29h 25m
2 stops
ORD
19 Mar
ORD
33h 30m
2 stops
BNE
$1,002
Air Canada
3 Mar
BNE
23h 03m
2 stops
ORD
10 Mar
ORD
33h 30m
2 stops
BNE
$1,054
Air Canada
22 Apr
BNE
32h 58m
2 stops
ORD
29 Apr
ORD
35h 25m
3 stops
BNE
$1,067
Air Canada
2 Mar
SYD
20h 21m
1 stop
ORD
16 Mar
ORD
25h 00m
1 stop
SYD
$1,091
Air Canada
2 Mar
SYD
20h 21m
1 stop
ORD
16 Mar
ORD
27h 45m
2 stops
SYD
$1,096
Air Canada
8 May
BNE
22h 01m
2 stops
ORD
16 May
ORD
31h 20m
2 stops
BNE
$1,104
Air Canada
2 Mar
SYD
24h 20m
2 stops
ORD
16 Mar
ORD
27h 45m
2 stops
SYD
$1,105
Air Canada
8 May
BNE
24h 58m
1 stop
ORD
16 May
ORD
31h 20m
2 stops
BNE
$1,107

Find the cheapest flights from Australia to Illinois

Recent return flight deals from Australia to Illinois

Enter your travel dates to find the best prices.
Air Canada Logo
10:45 - 20:00
BNE
-
ORD
25h 15m
1 stop
Air Canada Logo
07:15 - 07:45
ORD
-
BNE
33h 30m
2 stops
$969Air Canada
Thu, 5 Mar - Thu, 19 Mar
Air Canada Logo
10:00 - 08:00
BNE
-
ORD
37h 00m
2 stops
Air Canada Logo
15:40 - 07:05
ORD
-
BNE
24h 25m
1 stop
$977Air Canada
Wed, 22 Apr - Wed, 29 Apr
Air Canada Logo
10:45 - 14:41
BNE
-
ORD
19h 56m
1 stop
Air Canada Logo
15:35 - 07:45
ORD
-
BNE
25h 10m
1 stop
$994Air Canada
Tue, 3 Mar - Tue, 10 Mar
Delta Logo
09:40 - 21:06
SYD
-
STL
27h 26m
2 stops
Delta Logo
07:03 - 07:50
STL
-
SYD
32h 47m
2 stops
$1,297Delta
Mon, 23 Mar - Mon, 30 Mar
American Airlines Logo
12:00 - 19:29
MEL
-
STL
23h 29m
2 stops
American Airlines Logo
16:13 - 09:30
STL
-
MEL
25h 17m
2 stops
$1,345American Airlines
Mon, 9 Mar - Mon, 16 Mar
American Airlines Logo
12:00 - 23:58
MEL
-
STL
27h 58m
1 stop
American Airlines Logo
11:46 - 05:00
STL
-
MEL
26h 14m
1 stop
$1,348American Airlines
Sat, 28 Mar - Sat, 4 Apr
Delta Logo
09:15 - 21:14
SYD
-
STL
26h 59m
2 stops
Delta Logo
06:00 - 06:50
STL
-
SYD
33h 50m
2 stops
$1,373Delta
Sat, 6 Jun - Mon, 29 Jun
Qantas Airways Logo
07:15 - 20:40
PER
-
ORD
26h 25m
2 stops
Qantas Airways Logo
14:58 - 08:50
ORD
-
PER
28h 52m
2 stops
$1,824Qantas Airways
Mon, 23 Mar - Mon, 30 Mar
Qantas Airways Logo
07:30 - 23:47
PER
-
ORD
29h 17m
2 stops
Qantas Airways Logo
13:14 - 08:50
ORD
-
PER
30h 36m
2 stops
$1,847Qantas Airways
Wed, 25 Mar - Wed, 1 Apr
Japan Airlines Logo
10:30 - 13:45
PER
-
ORD
41h 15m
2 stops
Japan Airlines Logo
18:40 - 22:55
ORD
-
PER
39h 15m
2 stops
$1,879Japan Airlines
Thu, 5 Mar - Mon, 9 Mar

momondo Fare Finder

 
Locate flights to Illinois that fit your budget, with regularly updated fares and availability. In the last 7 days, momondo users made a total of 78,305 searches and data was last updated on 9 February 2026.
Use the filters below to find and compare flights to Illinois that are best for you.

Fly from

Route

Depart

Return

Price

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Thu 5/3

10:45-20:00

1 stop25h 15m

Chicago O'Hare Intl

Thu 19/3

07:15-07:45

2 stops33h 30m

$969

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Wed 22/4

10:00-08:00

2 stops37h 00m

Chicago O'Hare Intl

Wed 29/4

15:40-07:05

1 stop24h 25m

$977

BrisbaneChicago

BNE - ORD

BNEORD

Brisbane

Tue 3/3

10:45-14:41

1 stop19h 56m

Chicago O'Hare Intl

Tue 10/3

15:35-07:45

1 stop25h 10m

$994

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Mon 23/3

09:40-21:06

2 stops27h 26m

Lambert-St Louis

Mon 30/3

07:03-07:50

2 stops32h 47m

$1,297

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Mon 9/3

12:00-19:29

2 stops23h 29m

Lambert-St Louis

Mon 16/3

16:13-09:30

2 stops25h 17m

$1,345

MelbourneSt. Louis

MEL - STL

MELSTL

Melbourne

Sat 28/3

12:00-23:58

1 stop27h 58m

Lambert-St Louis

Sat 4/4

11:46-05:00

1 stop26h 14m

$1,348

SydneySt. Louis

SYD - STL

SYDSTL

Sydney Kingsford Smith

Sat 6/6

09:15-21:14

2 stops26h 59m

Lambert-St Louis

Mon 29/6

06:00-06:50

2 stops33h 50m

$1,373

PerthChicago

PER - ORD

PERORD

Perth

Mon 23/3

07:15-20:40

2 stops26h 25m

Chicago O'Hare Intl

Mon 30/3

14:58-08:50

2 stops28h 52m

$1,824

PerthChicago

PER - ORD

PERORD

Perth

Wed 25/3

07:30-23:47

2 stops29h 17m

Chicago O'Hare Intl

Wed 1/4

13:14-08:50

2 stops30h 36m

$1,847

PerthChicago

PER - ORD

PERORD

Perth

Thu 5/3

10:30-13:45

2 stops41h 15m

Chicago O'Hare Intl

Mon 9/3

18:40-22:55

2 stops39h 15m

$1,879

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Illinois from

Illinois flights insights and trends

Explore insights for your Illinois flight to craft the best travel plan

Which airlines fly to Illinois?

Qantas Airways, Air Canada and United Airlines are the top three most popular airlines that fly to Illinois from Australia according to our data. Qantas Airways is the first choice among our users, with 50% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 9 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

Cheapest flights to cities in Illinois

Click on the cities below to find out when it's cheapest to fly to Illinois from Australia
Chicago
Chicago
Find flights to Chicago

Cheap Illinois flight deals and tips

Summary info about Illinois flight prices, duration and airlines

Best One-Way Price

$544

Best Round-Trip Price

$969

Fastest flight time

23h 14m
The best one-way flight price to Illinois from Australia in the last 72 hours is $544 (Sydney Kingsford Smith to Chicago O'Hare Intl).
Search Deals
The best round-trip flight price to Illinois from Australia in the last 72 hours is $969 (Brisbane to Chicago O'Hare Intl).
Search Deals
The fastest flight to Illinois from Australia takes 23h 14m (Brisbane to Chicago O'Hare Intl).
Search Deals

Frequently asked questions about flying to Illinois

What is the cheapest flight I can find to Illinois?

For prices as low as $70/pp, you can find flights to Illinois depending on where you are departing from. On average, flights to Illinois cost $792/pp.

What is the best airport to fly into to visit Chicago?

Chicago is about 99% more popular to visit than any other city in Illinois, according to momondo users. When visiting Chicago, it is recommended to fly into Chicago O'Hare Intl Airport, where you can typically get the cheapest prices and the most convenient travel options into the city.

I plan on visiting River North. Which airport is the quickest drive?

The closest airport to River North is Chicago O'Hare Intl Airport, and would make for the quickest drive. For those interested in a secondary airport to fly into, consider looking at flights heading to Chicago Midway Airport.

What are the most popular landmarks in Illinois?

When visiting Illinois, the majority of people tend to find River North, Millennium Park and Chicago Riverwalk to be the most notable landmarks in the area.

What is the weather like in Illinois?

The temperatures in Illinois range from -5 °C to 23 °C depending on the time of year. The warmest month in Illinois is July, and the coldest month in Illinois is January. Those looking for a drier month during their visit should travel during the months of January, February, or December, when rain is least likely compared to the rest of the year.

Which airlines fly to Illinois?

There are 9 airlines that fly to Illinois on a routine basis, but Qantas Airways, Air Canada and United Airlines happen to be the most popular among our users. In the past year, 50% of those who searched for flights to Illinois looked to travel with Qantas Airways, making this airline the top choice among momondo travellers.

When did momondo last update prices for flights to Illinois?

Prices for flights to Illinois refresh daily.

How many operators does momondo search for flights to Illinois?

The number of operators available for flights to Illinois is 10 as of February 2026.

How old do you have to be to fly to Illinois?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel 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.

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights to Illinois. Millions of users trust and use momondo every year so you are in good company.

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

Yes. momondo enables you to select and highlight flights to Illinois with this policy.

How can momondo help me find flights to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as filter your options to help you make an informed choice when booking flights to Illinois.

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

Yes. momondo can track flight prices for Illinois and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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
Wed 11/3
Wed 18/3
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular Flights to Illinois

Popular routes according to searches in the past day on momondo
Brisbane to Chicago flightsfrom $1,088
Brisbane to St. Louis flightsfrom $1,113
Sydney to Chicago flightsfrom $1,210
Sydney to St. Louis flightsfrom $1,297
Adelaide to Chicago flightsfrom $1,359
Melbourne to Chicago flightsfrom $1,417
Cairns to Chicago flightsfrom $1,675
Coolangatta to Chicago flightsfrom $1,681
Perth to Chicago flightsfrom $1,847
Melbourne to St. Louis flightsfrom $1,858
Devonport to St. Louis flightsfrom $2,089
Townsville to Chicago flightsfrom $3,034