Cheap flights from Sydney to Illinois from $499
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 10/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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
What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from Sydney is in March. Flight prices, which tend to average around $741, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of March, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $748.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Sydney to Illinois is on a Thursday when prices can be found for as low as $1,103. Flights from Sydney to Illinois on a Monday will generally be more expensive and average around $1,626. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Sydney to Illinois during this time can be as low as $1,141. Flights in the morning are often more expensive with an average ticket price of $1,365.
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 $1,017 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 $848 on momondo.
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 are refreshed on a daily basis.
How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Illinois?
As of June 2025, there are 2 operators available to choose from for flights from Sydney Kingsford Smith Airport to Illinois.
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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
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 $631 | Free Cancellation | Rating 7.5 854 reviews | |||
| PriceFrom $884 | Free Cancellation | Rating 7.2 10,000 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Sydney to Illinois?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Sydney to Illinois for you.
Can I find flights from Sydney to Illinois with flexible booking policies on momondo?
Flights from Sydney to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Sydney to Illinois?
Once you have performed a search for Sydney to Illinois flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Sydney to Illinois right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Sydney to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.