$1,513 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 16/9. 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

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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

Wed, 16 Sep - Wed, 23 Sep
Multiple Airlines Logo
20:00 - 14:43-
33h 13m
Multiple Airlines Logo
19:48 - 12:50-
26h 32m
$1,513Multiple Airlines
Wed, 16 Sep - Wed, 23 Sep
Multiple Airlines Logo
20:00 - 08:00-
50h 30m
Multiple Airlines Logo
19:48 - 12:50-
26h 32m
$1,525Multiple Airlines
Fri, 18 Sep - Thu, 24 Sep
Air Canada Logo
20:00 - 14:43-
33h 13m
Air Canada Logo
19:45 - 18:10-
31h 55m
$1,586Air Canada
Fri, 18 Sep - Thu, 24 Sep
Air Canada Logo
20:00 - 14:43-
33h 13m
Air Canada Logo
19:45 - 18:10-
31h 55m
$1,592Air Canada
Fri, 18 Sep - Thu, 24 Sep
Multiple Airlines Logo
19:35 - 14:43-
33h 38m
Multiple Airlines Logo
14:15 - 22:00-
41h 15m
$1,723Multiple Airlines
Fri, 18 Sep - Thu, 24 Sep
Air Canada Logo
19:00 - 19:48-
39h 18m
Air Canada Logo
19:45 - 18:10-
31h 55m
$1,740Air Canada
Wed, 16 Sep - Wed, 23 Sep
Air Canada Logo
20:00 - 22:05-
40h 35m
Air Canada Logo
12:59 - 11:50-
32h 21m
$2,102Air Canada
Tue, 1 Sep - Sun, 6 Sep
Air Canada Logo
18:55 - 14:36-
34h 11m
Air Canada Logo
15:40 - 18:10-
36h 00m
$2,218Air Canada
Sat, 12 Sep - Sat, 19 Sep
Multiple Airlines Logo
17:10 - 14:43-
36h 03m
Multiple Airlines Logo
14:52 - 13:55-
32h 33m
$2,276Multiple Airlines
Sat, 12 Sep - Sat, 19 Sep
Multiple Airlines Logo
17:15 - 19:48-
41h 03m
Multiple Airlines Logo
14:52 - 11:50-
30h 28m
$2,291Multiple Airlines
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.

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 May and December, when the average cost of return tickets is $4,587 and $3,313 respectively.

Find deals

Good to know

Low season

May

Cheapest flight

$1,513
Best time to beat the crowds (34% less expensive on average)
Most popular time to fly and prices are also 11% lower 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.
7.5
Qantas AirwaysOverall score based on 1079 reviews
8.1Crew
7.2Entertainment
7.0Food
7.4Comfort
7.7Boarding
Airline reviews

Great food and good entertainment options for the long flight.

10.0 ExcellentBill, May 2026
Read more Qantas Airways reviews

Great food and good entertainment options for the long flight.

Loved the food and beverages available, spacious economy class, excellent entertainment

Very good overall. Highly recommend for all flying to Australia

We had bulkhead seats in a A380 in the upper deck in seats 31 D and E. Storage was very limited other than in overhead bin - which is not within reach when in seat. Yet paying same price as others in premium economy who have a lot more storage within arm’s reach. Seems very unfair.

Excellent as always, I won't fly to Australia, and back to the US on any other airline. The flight crew is always top notch, and have a way to make one feel extra special. Thank you for your service, I would rate Qantas Airways a 10+.

Poor! This flight was delayed 14 hours. There was no assistance in helping customers find other routes to their destination, nor any other kind of support. It was a chaotic experience. I'm not likely to fly with AA going forward.

Overall good experience with flight and airport wheelchair staff. Also got Indian food in the flights

Terrible. 6 hour delay with no explanations and only 15 dollars in food credits. A disaster. I'll just leave it at that.

It was so hot on the plane mixed with being quite turbulent and a rough landing. We all felt very nauseous for hours afterwards. Crew were lovely though.

Ease of boarding. Staff were friendly and helpful. Food was good. In flight entertainment great.

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

Information on your arrival and departure airports

Adelaide (ADL)