$1,653 Find Cheap Flights from Adelaide to Illinois – Compare and Save

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Adelaide to Illinois departing on 3/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Adelaide to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Adelaide to Illinois, as well as popular online travel agencies
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Flight Deals

Book Cheap Adelaide to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Adelaide to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Adelaide to Illinois

Mon, 3 Aug - Mon, 10 Aug
Multiple Airlines Logo
08:55 - 20:29
ADL
-
ORD
26h 04m
2 stops
Multiple Airlines Logo
15:54 - 08:00
ORD
-
ADL
25h 36m
2 stops
$1,653Multiple Airlines
Sat, 1 Aug - Sat, 8 Aug
Qantas Airways Logo
06:00 - 19:44
ADL
-
ORD
28h 14m
2 stops
Qantas Airways Logo
21:06 - 09:25
ORD
-
ADL
45h 49m
2 stops
$1,710Qantas Airways
Thu, 30 Jul - Thu, 6 Aug
Qantas Airways Logo
06:00 - 00:07
ADL
-
ORD
32h 37m
2 stops
Qantas Airways Logo
09:45 - 09:25
ORD
-
ADL
33h 10m
2 stops
$1,730Qantas Airways
Tue, 21 Jul - Tue, 28 Jul
Qantas Airways Logo
06:00 - 15:59
ADL
-
ORD
24h 29m
2 stops
Qantas Airways Logo
15:21 - 09:25
ORD
-
ADL
27h 34m
2 stops
$2,067Qantas Airways
Tue, 21 Jul - Tue, 28 Jul
Qantas Airways Logo
06:00 - 15:59
ADL
-
ORD
24h 29m
2 stops
Qantas Airways Logo
18:28 - 11:05
ORD
-
ADL
26h 07m
2 stops
$2,079Qantas Airways
Tue, 3 Nov - Sat, 7 Nov
American Airlines Logo
19:00 - 21:25
ADL
-
ORD
42h 55m
2 stops
American Airlines Logo
22:05 - 13:00
ORD
-
ADL
46h 25m
2 stops
$2,431American Airlines
Thu, 2 Jul - Sat, 18 Jul
Multiple Airlines Logo
11:50 - 21:10
ADL
-
ORD
47h 50m
2 stops
Multiple Airlines Logo
00:30 - 11:10
ORD
-
ADL
44h 10m
2 stops
$2,532Multiple Airlines
Tue, 21 Jul - Tue, 28 Jul
Multiple Airlines Logo
06:00 - 15:59
ADL
-
ORD
24h 29m
2 stops
Multiple Airlines Logo
15:07 - 11:05
ORD
-
ADL
29h 28m
3 stops
$2,571Multiple Airlines
Tue, 21 Jul - Tue, 28 Jul
Multiple Airlines Logo
10:10 - 00:07
ADL
-
ORD
28h 27m
3 stops
Multiple Airlines Logo
15:07 - 11:55
ORD
-
ADL
30h 18m
3 stops
$2,613Multiple Airlines
Tue, 21 Jul - Tue, 28 Jul
Qatar Airways Logo
22:00 - 21:58
ADL
-
ORD
38h 28m
2 stops
Qatar Airways Logo
19:20 - 15:00
ORD
-
ADL
29h 10m
1 stop
$2,637Qatar Airways
Booking Insights

KAYAK's insights & trends for Adelaide to Illinois flights

Get data-powered insights and trends into flights from Adelaide to Illinois to help you find the cheapest flights, the best time to fly, and much more.

How much is a return flight from Adelaide to Illinois?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Adelaide to Illinois departing in August.

What is the cheapest month to fly from Adelaide to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Adelaide to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Adelaide to Illinois is February, when tickets cost $0 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of return tickets is $2,030 and $1,777 respectively.

Find deals

Good to know

Low seasonApril
Cheapest flight$1,653
Best time to beat the crowds (29% less expensive on average)
Most popular time to fly (37% more expensive on average)
Flight from Adelaide to Chicago

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Adelaide to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Adelaide to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Adelaide to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Adelaide to Illinois is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Adelaide to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Adelaide to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Adelaide to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Adelaide to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Adelaide to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Adelaide to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Adelaide to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
Air CanadaOverall score based on 11220 reviews
6.3Food
7.1Comfort
6.8Entertainment
7.3Boarding
7.8Crew
Airline reviews

Aircraft is designed with all 3 washrooms at the back of the plane, meaning that when there is service underway, there are no washrooms available and it gets very crowded at the back of the plane.

6.0 GoodMark, June 2026
YYZ - SFO
Read more Air Canada reviews

Aircraft is designed with all 3 washrooms at the back of the plane, meaning that when there is service underway, there are no washrooms available and it gets very crowded at the back of the plane.

Multiple delays and gate changes resulting in arrival with a 5 hour delay.

One crew member, Brandy was very helpful with recovering phone lost in customs. The plane was ancient and poorly maintained. Checked baggage did not arrive with flight. Almost missed flight because if insanely short layover time. Air Canada is worst flight I have ever booked with Kayak. Wanted to charge for headsets for on flight media.

The flight was good. My luggage didn’t land with me when I arrived in Columbus. So grateful I was able to get my luggage back within the 2 hours😍👍.

gave me complimentary food as the flight was not full and was attentive to my needs

It was a nice and smooth trip. Gave a friendly environment throughout the journey.

Meal and drink service was good. Old plane with old business class seats were quite disappointing

The flight was smooth, the plane was spacious and clean, the staff was kind and the food was decent.

Pretzels were a bit dry and dusty, however it is nice to have a choice between sweet and savory snacks.

Flight crew was great, and even the crew for checking bags! I had a question for a friend of mine flying tomorrow and the man I talked to was awesome and answered my questions and looked up things for me when he didn’t have to! I was able to give her current & accurate info for her flight and she was so appreciative too!!

Everything you need to know for your flight from Adelaide to Illinois

Information on your arrival and departure airports

Adelaide (ADL)