Cheap flights to Illinois
Flights to Illinois in 2021
Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
| Popular in | January | High demand for flights, 18% potential price rise |
| Cheapest in | February | Best time to find cheap flights, 3% potential price drop |
| Average price | $2,013 | Average for return flights in December 2021 |
| Return from | $1,359 | From Sydney Kingsford Smith to Chicago |
| One-way from | $1,056 | One-way flight from Sydney Kingsford Smith (SYD) to Illinois |
Cheap flights to Illinois in December, January 2021
The best prices found for CHI flights for December, January
Sydney Kingsford Smith
Chicago O'Hare Intl
2 stops
38h 12mChicago O'Hare Intl
Sydney Kingsford Smith
1 stop
30h 15mANA
Sydney Kingsford Smith
Chicago O'Hare Intl
2 stops
37h 31mChicago O'Hare Intl
Sydney Kingsford Smith
1 stop
30h 15mANA
Sydney Kingsford Smith
Chicago O'Hare Intl
2 stops
42h 05mChicago O'Hare Intl
Sydney Kingsford Smith
2 stops
35h 35mMultiple Airlines
Illinois 2021 flight deals
Cheap flights to Illinois found for this year
Sydney Kingsford Smith
Chicago O'Hare Intl
1 stop
37h 10mChicago O'Hare Intl
Sydney Kingsford Smith
2 stops
42h 45mJapan Airlines
Sydney Kingsford Smith
Chicago O'Hare Intl
1 stop
37h 10mChicago O'Hare Intl
Sydney Kingsford Smith
1 stop
27h 10mJapan Airlines
Sydney Kingsford Smith
Chicago O'Hare Intl
1 stop
37h 10mChicago O'Hare Intl
Sydney Kingsford Smith
2 stops
30h 44mJapan Airlines
Last minute flights to Illinois
Late deals on return flights to Illinois, departing today and this week
Sydney Kingsford Smith
Chicago O'Hare Intl
1 stop
37h 10mChicago O'Hare Intl
Sydney Kingsford Smith
1 stop
27h 10mJapan Airlines
Sydney Kingsford Smith
Chicago O'Hare Intl
1 stop
37h 10mChicago O'Hare Intl
Sydney Kingsford Smith
2 stops
30h 44mJapan Airlines
Sydney Kingsford Smith
Chicago O'Hare Intl
3 stops
30h 59mChicago O'Hare Intl
Sydney Kingsford Smith
2 stops
41h 25mMultiple Airlines
Can I fly to Illinois from Australia right now?
Most visitors from Australia need to provide a negative COVID-19 test result and/or quarantine to enter Illinois.
COVID-19 testing requirements
Visitors from Australia must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Illinois.
Quarantine requirements
Visitors from Australia are not required to quarantine after entering Illinois.
Can I fly back to Australia from Illinois?
COVID-19 testing requirements
Visitors from Illinois must present a negative RT-PCR (NAAT) test taken 72 hours before departing to Australia.
Quarantine requirements
Visitors from Illinois are not required to quarantine after entering Australia.
What is the cheapest month to fly to Illinois?
The cheapest ticket to Illinois found for each month in 2021 based on historical flight searches by Cheapflights users.
January
$1,280
February
$1,264
March
$1,255
April
$1,465
May
$1,290
June
$1,325
July
$1,291
August
$1,241
September
$1,281
October
$1,246
November
$1,159
December
$1,607
Currently, November is the cheapest month in which you can book a flight to Illinois. Flying to Illinois in December will prove the most costly. There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.
When is the best time to fly to Illinois?
Average Illinois flight ticket prices and weather conditions for 2021 and 2022 by month
SYD - CHI | Price | $1,176 - $2,364 |
CHI | Temperature | -5 - 23 °C |
CHI | Precipitation | 43 - 125 mm |