Cheap flights from Sydney to Illinois from $905
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sydney to Illinois departing on 29/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Return
1 adult
Economy
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Round-trip
One-way
Cheap return flights
These are some of the best return flight deals from Sydney to Illinois that have been recently found on momondo from popular airlines, departing in the coming months.
Cheap one-way flights
Flying one-way? These are some of the best deals recently discovered on momondo for flights from Sydney to Illinois.
United Airlines flights from Sydney to Illinois
Our best United Airlines deals on Sydney to Illinois flight tickets
United Airlines![United Airlines]()
13 June![United Airlines]()
20 June
SYD10:20Sydney Kingsford Smith
24h 51m
1 stop
ORD20:11Chicago O'Hare Intl
ORD18:25Chicago O'Hare Intl
21h 35m
1 stop
SYD07:00Sydney Kingsford Smith
United Airlines![United Airlines]()
18 Aug![United Airlines]()
8 Nov
SYD09:30Sydney Kingsford Smith
22h 01m
2 stops
STL16:31Lambert-St Louis
STL16:17Lambert-St Louis
21h 43m
1 stop
SYD07:00Sydney Kingsford Smith
ANA flights from Sydney to Illinois
Our best ANA deals on Sydney to Illinois flight tickets
ANA![ANA]()
11 Sept![ANA]()
15 Sept
SYD11:50Sydney Kingsford Smith
35h 50m
1 stop
ORD08:40Chicago O'Hare Intl
ORD20:20Chicago O'Hare Intl
31h 55m
2 stops
SYD19:15Sydney Kingsford Smith
ANA![ANA]()
24 June![ANA]()
29 July
SYD11:50Sydney Kingsford Smith
47h 35m
2 stops
ORD20:25Chicago O'Hare Intl
ORD17:45Chicago O'Hare Intl
34h 30m
1 stop
SYD19:15Sydney Kingsford Smith
See travel insights to Illinois from
How to get the cheapest flight ticket from Sydney to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
Prices
Airlines
What is the cheapest month to fly to Illinois?
In general, March is the cheapest month to fly from Sydney to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,169. If you’re not able to fly to Illinois in March, then February is your next best option. Flight prices from Sydney to Illinois during February average around $1,186.
What is the cheapest day to depart on your flight to Illinois?
On average, the least expensive day to fly to Illinois from Sydney is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $1,755. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $2,066. These prices are subject to change though, so be sure to set up a Price Alert for flights to Illinois.
What is the cheapest time of day to depart on your flight to Illinois?
According to our data, the cheapest time of day to fly to Illinois is in the afternoon. momondo users have found flights departing from Sydney to Illinois in the afternoon for as low as $1,752. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Illinois are more costly in the morning, with an average ticket price of $1,938. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Sydney when booking 20 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $1,682 when searching 20 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Sydney for as low as $1,340 on momondo.
What is the cheapest airline that flies from Sydney Kingsford Smith to Illinois?
American Airlines, Cathay Pacific, and Air Canada are the most popular carriers operating from Sydney Kingsford Smith to Illinois
Which airlines fly to Illinois?
Qantas Airways, Air Canada and United Airlines are the top three most popular airlines that fly to Illinois from Sydney according to our data. Qantas Airways is the first choice among our users, with 64% of people opting to fly with this airline when travelling to Illinois. Keep in mind that there are 7 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
Cheap Sydney to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Sydney to Illinois
When did momondo last update prices for flights from Sydney Kingsford Smith Airport to Illinois?
Prices for flights from Sydney Kingsford Smith Airport to Illinois were last updated today.
How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Illinois?
The number of operators available for flights from Sydney Kingsford Smith Airport to Illinois is 7 as of May 2025.
How old do you have to be to fly from Sydney Kingsford Smith Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Sydney Kingsford Smith Airport 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.
Best airlines flying from Sydney to Illinois
Compare and see reviews for airlines that fly from Sydney to Illinois with momondo
| Airline | Rating | Free cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $1,036 | Free cancellation | Rating 7.5 829 reviews | |||
| PriceFrom $1,300 | Free cancellation | Rating 7.0 9,252 reviews | |||
| PriceFrom $1,548 | Free cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $1,587 | Free cancellation | Rating 7.4 8,696 reviews | |||
| PriceFrom $1,716 | Free cancellation | Rating 8.3 852 reviews | |||
| PriceFrom $1,735 | Free cancellation | Rating 7.5 400 reviews | |||
| PriceFrom $1,827 | Free cancellation | Rating 8.0 7,934 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Sydney to Illinois?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Sydney to Illinois . Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Sydney to Illinois with flexible booking policies on momondo?
Yes. All flights to Illinois from Sydney on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Sydney to Illinois?
momondo provides multiple filters to help you find the best flight to Illinois from Sydney. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Sydney to Illinois right now. Can momondo alert me if prices change?
Price alerts on flights to Illinois from Sydney are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.
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