$1,295 Find Cheap Flights from Adelaide to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Adelaide to Illinois departing on 15/12. 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

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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Cheap Flights from Adelaide to Illinois

Cheapest return prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago2 stops$1,447
Chicago
Chicago2 stops$1,447

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, 20 Oct - Sat, 8 Nov
 Logo
10:50 - 15:00ADL-ORD
43h 40m2 stops
 Logo
15:40 - 10:10ORD-ADL
50h 00m2 stops
$1,447
Find Deal
Sun, 8 Mar - Wed, 11 Mar
Air Canada Logo
06:00 - 18:30ADL-ORD
29h 00m3 stops
Air Canada Logo
15:40 - 22:30ORD-ADL
39h 20m2 stops
$1,537Air Canada
Find Deal
Sun, 8 Mar - Wed, 11 Mar
Air Canada Logo
06:00 - 14:10ADL-ORD
48h 40m3 stops
Air Canada Logo
15:40 - 22:30ORD-ADL
39h 20m2 stops
$1,538Air Canada
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Air New Zealand Logo
11:55 - 20:25ADL-ORD
24h 00m2 stops
Air New Zealand Logo
14:30 - 10:55ORD-ADL
27h 55m2 stops
$1,643Air New Zealand
Find Deal
Mon, 20 Oct - Sat, 8 Nov
Air Canada Logo
20:00 - 19:24ADL-ORD
38h 54m3 stops
Air Canada Logo
15:40 - 22:30ORD-ADL
38h 20m2 stops
$1,703Air Canada
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Air Canada Logo
19:55 - 18:39ADL-ORD
38h 14m3 stops
Air Canada Logo
15:40 - 18:10ORD-ADL
34h 00m2 stops
$1,801Air Canada
Find Deal
Sun, 8 Mar - Wed, 11 Mar
Cathay Pacific Logo
12:00 - 13:00ADL-ORD
41h 30m1 stop
Cathay Pacific Logo
15:40 - 10:30ORD-ADL
27h 20m1 stop
$1,958Cathay Pacific
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Qatar Airways Logo
22:00 - 15:30ADL-ORD
33h 00m1 stop
Qatar Airways Logo
18:50 - 08:10ORD-ADL
44h 50m2 stops
$3,321Qatar Airways
Find Deal
Mon, 20 Oct - Sat, 8 Nov
Qatar Airways Logo
21:40 - 14:50ADL-ORD
32h 40m1 stop
Qatar Airways Logo
18:50 - 17:05ORD-ADL
29h 45m1 stop
$3,422Qatar Airways
Find Deal
Thu, 9 Oct - Sat, 18 Oct
Virgin Australia Logo
07:40 - 00:54ADL-ORD
32h 44m2 stops
Virgin Australia Logo
18:32 - 12:10ORD-ADL
26h 08m2 stops
$10,394Virgin Australia
Find Deal
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 April, when tickets cost $1,493 (return) on average. On the other hand, the most expensive months are December and September, when the average cost of return tickets is $2,496 and $2,398 respectively.

Good to know

Low seasonApril
Cheapest flight$1,295
Best time to beat the crowds (25% less expensive on average)
Most popular time to fly and prices are also 22% 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.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the evening, when retur flights cost $1,459 on average. Morning departures are around 1% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally at night, which is peak travel time and where the average cost of a ticket is $1,597.

Reviews of the top 4 airlines 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.
7.6
Cathay PacificOverall score based on 993 reviews
7.6Comfort
7.3Food
7.9Boarding
8.1Crew
7.8Entertainment
Airline reviews

Just want to do a little more clean up so does not smell like urine.

8.0 ExcellentBonita, Aug 2025HKG - ORD
Read more Cathay Pacific reviews

Just want to do a little more clean up so does not smell like urine.

Check in process at the kiosk, crew in flight and overall comfort was good. Food selection could have been better. Flight from Hong Kong to Los Angeles did not have any vegetarian main course option, it was either sea food or chicken. Being a vegetarian I could only eat yogurt and fruit. Most international flights have one vegetarian main course dish which I found missing in Cathay Pacific menu.

Paid a premium a have a shorter transit time in Hong Kong, but Cathay pacific rebooked me and ended up waiting for 10 hrs in Hong Hong airport.

Entertainment for kids was good. Good was terrible, needs lots of work.

As before, my only problem was not being able to download my boarding passes prior to arrival at the airport. Everything else was perfect.

If I had blood clots, that window seat would've killed me for certain.

They ran out of food and were offering random food to passengers.

The food and service was great. You have to pay a lot for in flight Internet though which is lame.

Special request meals are really below average. Vegetarian options are very limited if you didn't prebook.

I've stomach problems after 2 hours of flight, Iris, the flight purser not only did her best to make me feel comfortable, she went above and beyond providing pain relievers medicines and ointment. She look and found a doctor passenger on the flight to provide advise. She even report on ground staffs about my condition and provide wheelchair upon arrival. Kudos to her and Cathay Pacific!

Overall experience was good but what really impressed me the most was the care the flight attendants took of a sick passenger who was sitting in front of me. The flight attendants would come and check on her quite regularly providing her support and comfort. Brilliant service!

Only answered OK and poor as there was no entertainment and I didnt have any food

4.5 hr international flight. We got a glass of water. Ranks up there with Ryan Air, Easy Jet, Spirit and Frontier. Expected better.

Gluten free options less explicit on business class, but great service

Very good… seems the virgin staff particularly in the lounge and in flight exceeded expectations.

I liked everything about the experience but would have liked some free snacks!

Crew was great but flight was delayed almost three hours due to a technical issue and we had to go back to the terminal and wait for another one.

Being told why we delayed three hours and not even given an apology by someone. Not a word. Not my airline of choice ever.

Checked Baggage line up was long but moved quickly, rest of the process, boarding, crew was excellent

Virgin has always provided a smooth and comfortable flight. This one was no different. Seats are comfortable. Staff are great. This is my favourite airline.

My flight from Dallas to Sydney was cancelled. My entire trip was rerouted to include the following: Hartford to Washington DC Washington DC to JFK JFK to Auckland Auckland to Christchurch I paid for an aisle seat on the flight to Auckland and was asked if I would take a window seat to accommodate a family. The agent at the podium failed to mention that the family had a 3 month old baby and that a bassinet would be used during the 16 hour flight. The only way I could get out of my seat was to crawl under the bassinet of the sleeping baby. I think it is wrong that I was no given the choice to sit in another seat, that the agent knew what she was doing and chose to not properly disclose my seating arrangement. Terrible treatment.

they ran out of fruit for breakfast and so I just had a yogurt instead. other than that the flight was good

by the time they got to our row, they were out of some of the food options. games and movies were great but maybe more game options like tetris or pac man would be great

A few more inches of legroom is all i ask

Great as usual, some delays but well communicated and made up for in the air

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.

Business class points redemption - good value for points paid, dubious value if out of your own pocket, domestic class business product okay for this length of flight. The flight left and arrived on time, crew were good, aircraft was a bit old and tired, but still miles ahead of their competitors in Virgin and Jetstar.

Airline running better than post Covid, proper boarding process now implemented, some aircraft feeling a bit old and tired, crew fine, online experience better.

We were upgraded and after just a short delay in attending to a safety check we were on our way. Would definately fly Qantas International on their Dreamliner again.

Five hour flight instead of four hours due to westerly headwinds which wasn’t the fault of Qantas !

I liked the behaviour of the crew members.The flight was good.

1 hour late No hot drinks No restroom in the back of the plane

I swear airplane seats keep getting smaller and smaller but everything else was great. Smooth sailing and we got in early.

No food to provide, they forgot that, in some cases, people stay at the airport for hours without food. Now, to provide them with food, they have to ask them to pay, because some don't have money. That way, they can't eat.

After a long flight from Tokyo, our connecting flight home was canceled due to “maintenance” while we were on our layover in Toronto. Very frustrating to close out our honeymoon, although I’m sure others had it even worse during last week’s strike. Air Canada staff at Pearson Airport are the one thing that kept me remotely at peace during this — they were very helpful and deserve a lot of props. But I would not fly Air Canada again.

I had wonderful wheelchair assistance through the Montreal airport onto the flight. Air Canada was excellent in this both at the Fredericton airport and the Montreal one where an attendant helped us through customs as well as transport and baggage security.

Horrible flight cancelled had to buy another very expensive ticket

Flight was cancelled last minute due to Air Canada strike leaving us stranded and having to stressfully find a way home that cost hundreds of dollars in excess cost added to the trip. Having just experienced our mother's funeral service, this was not a good way to end our trip.

Air Canada marooned me in Canada with no way back home during my summer vacation. I had to buy a last minute flight ticket for over $500 to make it back home. I have their credit card and have flown them for years. Never again.

Flight was cancelled last minute. Had to scramble and purchase a $2000 flight through a separate airlines. Stuck in Toronto two extra days. Missed my first two days on a new job. Had to rent a car for an additional two days. Scrambled to fins a place to live those extra two days. Spent a ton of extra money and lost a lot of money, as well as made a poor impression at work. Difficult difficult difficult

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

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