What are the cheapest airlines flying from Chicago to Sydney round-trip?

Our cheapest airline available from Chicago to Sydney is Fiji Airways. Our recent data shows that you can find tickets from as low as $1,227 on this airline. Additional options worth looking into are Alaska Airlines and Air New Zealand, starting at $1,252 and $1,303 round-trip.

What are the cheapest airlines to fly from Chicago to Sydney one-way?

One-way options have recently been found by users for as low as $674 on Alaska Airlines. Other airlines that offer cheap prices include Fiji Airways from $690 and Qantas Airways from $777 one-way.

What are the most popular airlines that fly from Chicago to Sydney?

When booking a flight from Chicago to Sydney, you may want to consider flying on American Airlines, Air Canada or Delta as they are the most popular for this route.

Where are the most common layover locations when flying from Chicago to Sydney?

Chicago to Sydney flights have a layover in Los Angeles most often. Los Angeles is followed by Vancouver in terms of the most popular layover location on flights from Chicago to Sydney.

Where are the least popular layover locations for Chicago to Sydney flights?

Chicago to Sydney flights have a layover in Dallas least often.

What are some popular things to do or see while on a layover in Los Angeles?

The majority of Los Angeles visitors spend their time at Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live. Travelers on a layover in Los Angeles can visit Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live, by traveling 12.5 mi, 11.7 mi, and 10.8 mi, respectively after landing at Los Angeles. Travelers in need of a car in Los Angeles can rent one for about $40 per day.

What are some popular points of interest to see during a layover in Vancouver?

Pacific Central Station, Orpheum Theatre, and Capilano Suspension Bridge are currently the most popular points of interest in Vancouver at the moment. Those on a layover in Vancouver interested in visiting Pacific Central Station, Orpheum Theatre, or Capilano Suspension Bridge can do so by traveling 6.6 mi, 6.5 mi, and 10.6 mi, respectively from Vancouver Intl. Those landing in Vancouver looking to spend some time exploring during their layover can rent a car for about $50 per day.

What is the cheapest day to fly round-trip from Chicago to Sydney?

Leaving on a Friday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 19% on the overall cost on flights from Chicago to Sydney.

What is the cheapest month to fly from Chicago to Sydney?

August is one of the best times of the year to fly to Sydney from Chicago. Prices for August average $1,041 per person but you can even find prices for as low as $749. The most expensive prices can be found in the month of December. Opting for a August flight can save you 46% on your journey compared to booking in December

What airport do you fly into for flights to Sydney from Chicago?

Located just 4.6 mi from the city center, Sydney Kingsford Smith is the airport most travelers will use when flying to Sydney from Chicago. Booking flights from Chicago to Kingsford Smith (SYD) should be relatively easy as there are 0 daily inbound flights from Chicago from 8 different airlines.

Can I find deals for flights from Chicago to Sydney that include hotel bookings?

Yes. In addition to deals on Chicago to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Chicago to Sydney?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Sydney.

Can I find deals for business class flights from Chicago to Sydney?

Yes. Cheapflights offers flight deals from Chicago to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$454+ Flights from Chicago to Sydney

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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

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Cheapflights Tip: The best prices from Chicago to Sydney Kingsford Smith are usually found in August or April, booked 2 days in advance, depart on a Saturday or Sunday and return on a Thursday

Cheap flight deals from Chicago to Sydney

Round-trip from	$1,045 (Trip.com)
One-way from	$454 (Kiwi.com)
Popular in	December
Cheapest in	August
Average price	$925

From Chicago (CHI) to Sydney Kingsford Smith

Search Deals

One-way flight from Chicago (CHI) to Sydney Kingsford Smith

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Highest demand for flights based on searches. 14% potential increase in price ($182 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($44 potential savings vs. average RT price).

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Average for round-trip flights in June 2025

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Find flight deals from Chicago to Sydney

Cheapest flights from Chicago to Sydney
Explore the most affordable flight options available from Chicago to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Wed 7/27:42 amORD - SYD

1 stop32h 48mMultiple Airlines

Thu 7/175:45 pmSYD - ORD

2 stops27h 18mMultiple Airlines

Deal found 6/12

$1,045

Sat 8/166:20 pmORD - SYD

2 stops26h 25mFiji Airways

Sat 8/231:45 pmSYD - ORD

2 stops22h 12mFiji Airways

Deal found 6/10

$1,227

Wed 8/272:07 pmORD - SYD

2 stops26h 23mAlaska Airlines

Wed 9/35:45 pmSYD - ORD

2 stops28h 18mAlaska Airlines

Deal found 6/10

$1,252

Wed 9/105:50 pmORD - SYD

2 stops23h 55mAir New Zealand

Wed 9/2411:50 amSYD - ORD

2 stops24h 50mAir New Zealand

Deal found 6/11

$1,303

Tue 9/27:03 pmORD - SYD

1 stop21h 27mQantas Airways

Tue 10/1410:10 amSYD - ORD

1 stop22h 52mQantas Airways

Deal found 6/10

$1,364

Tue 9/28:48 amORD - SYD

2 stops31h 32mAir Canada

Tue 10/1410:20 amSYD - ORD

1 stop20h 35mAir Canada

Deal found 6/10

$1,372

Tue 10/77:50 pmORD - SYD

2 stops32h 10mTurkish Airlines

Sun 10/199:55 pmSYD - ORD

2 stops40h 05mTurkish Airlines

Deal found 6/11

$1,416

Wed 9/101:43 pmMDW - SYD

2 stops25h 52mDelta

Wed 9/249:25 amSYD - MDW

2 stops27h 19mDelta

Deal found 6/10

$1,465

Mon 10/209:30 amMDW - SYD

2 stops29h 50mMultiple Airlines

Wed 11/59:10 amSYD - MDW

2 stops44h 22mMultiple Airlines

Deal found 6/11

$2,484

Sat 11/154:25 pmMDW - SYD

2 stops45h 30mKorean Air

Mon 12/19:10 amSYD - MDW

2 stops53h 34mKorean Air

Deal found 6/12

$2,535

Wed 6/259:21 amMDW - SYD

2 stops30h 14mWestJet

Sat 6/288:30 pmSYD - MDW

2 stops36h 10mWestJet

Deal found 6/11

$9,860

Best flights from Chicago to Sydney
Discover carefully curated flight deals from Chicago to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2025.

Wed 7/27:42 amORD - SYD

1 stop32h 48mMultiple Airlines

Thu 7/175:45 pmSYD - ORD

2 stops27h 18mMultiple Airlines

Deal found 6/12

$1,045

Sat 8/166:20 pmORD - SYD

2 stops26h 25mFiji Airways

Sat 8/231:45 pmSYD - ORD

2 stops22h 12mFiji Airways

Deal found 6/10

$1,227

Wed 8/272:07 pmORD - SYD

2 stops26h 23mAlaska Airlines

Wed 9/35:45 pmSYD - ORD

2 stops28h 18mAlaska Airlines

Deal found 6/10

$1,252

Wed 9/105:50 pmORD - SYD

2 stops23h 55mAir New Zealand

Wed 9/2411:50 amSYD - ORD

2 stops24h 50mAir New Zealand

Deal found 6/11

$1,303

Tue 9/27:03 pmORD - SYD

1 stop21h 27mQantas Airways

Tue 10/1410:10 amSYD - ORD

1 stop22h 52mQantas Airways

Deal found 6/10

$1,364

Tue 9/28:48 amORD - SYD

2 stops31h 32mAir Canada

Tue 10/1410:20 amSYD - ORD

1 stop20h 35mAir Canada

Deal found 6/10

$1,372

Sun 8/38:50 amORD - SYD

1 stop31h 15mBritish Airways

Tue 8/199:10 amSYD - ORD

1 stop23h 33mBritish Airways

Deal found 6/12

$1,429

Tue 8/195:45 pmORD - SYD

1 stop24h 40mANA

Sat 8/308:55 pmSYD - ORD

2 stops32h 53mANA

Deal found 6/12

$1,432

Wed 8/275:14 pmORD - SYD

2 stops22h 51mAmerican Airlines

Wed 9/39:10 amSYD - ORD

1 stop25h 05mAmerican Airlines

Deal found 6/10

$1,448

Wed 9/101:08 pmMDW - SYD

2 stops26h 27mDelta

Wed 9/249:25 amSYD - MDW

2 stops27h 19mDelta

Deal found 6/12

$1,465

Wed 6/259:24 amMDW - SYD

2 stops29h 56mKorean Air

Sat 2/219:10 amSYD - MDW

2 stops29h 36mKorean Air

Deal found 6/11

$3,636

Thu 8/289:30 amMDW - SYD

2 stops29h 50mMultiple Airlines

Sun 8/317:55 amSYD - MDW

2 stops43h 33mMultiple Airlines

Deal found 6/10

$3,083

Last-minute flights from Chicago to Sydney
Discover last-minute flight deals from Chicago to Sydney. Data last updated June 12, 2025 and is based on user searches.

Fri 6/139:24 amMDW - SYD

2 stops29h 56mMultiple Airlines

Tue 6/177:55 amSYD - MDW

2 stops43h 34mMultiple Airlines

Deal found 6/10

$3,134

Tue 6/171:30 amORD - SYD

1 stop37h 50mJapan Airlines

Wed 7/98:55 amSYD - ORD

1 stop39h 20mJapan Airlines

Deal found 6/10

$2,820

Wed 6/186:53 pmORD - SYD

1 stop21h 12mQantas Airways

Wed 7/99:10 amSYD - ORD

1 stop20h 07mQantas Airways

Deal found 6/11

$1,641

Wed 6/184:20 pmORD - SYD

2 stops23h 35mUnited Airlines

Wed 7/99:30 amSYD - ORD

2 stops22h 32mUnited Airlines

Deal found 6/10

$1,764

Wed 6/181:45 pmORD - SYD

2 stops25h 50mDelta

Wed 7/99:25 amSYD - ORD

2 stops24h 00mDelta

Deal found 6/9

$1,769

Wed 6/188:45 amORD - SYD

2 stops31h 35mAir Canada

Wed 7/99:20 amSYD - ORD

3 stops37h 39mAir Canada

Deal found 6/10

$1,994

Thu 6/197:49 pmORD - SYD

2 stops35h 21mMultiple Airlines

Wed 6/251:15 pmSYD - ORD

3 stops31h 57mMultiple Airlines

Deal found 6/11

$1,312

Fri 6/204:04 pmORD - SYD

2 stops27h 31mAir New Zealand

Fri 6/2710:20 amSYD - ORD

1 stop25h 58mAir New Zealand

Deal found 6/12

$2,035

Fri 6/208:42 pmORD - SYD

2 stops32h 03mAlaska Airlines

Fri 6/279:40 pmSYD - ORD

2 stops35h 38mAlaska Airlines

Deal found 6/12

$2,126

Fri 6/209:24 amMDW - SYD

2 stops29h 56mMultiple Airlines

Fri 6/277:55 amSYD - MDW

2 stops43h 34mMultiple Airlines

Deal found 6/12

$3,184

Sat 6/217:15 pmORD - SYD

2 stops25h 30mFiji Airways

Tue 7/86:15 amSYD - ORD

2 stops29h 45mFiji Airways

Deal found 6/11

$1,578

Sat 6/214:45 pmORD - SYD

2 stops23h 20mAmerican Airlines

Tue 7/89:10 amSYD - ORD

1 stop23h 32mAmerican Airlines

Deal found 6/11

$1,798

One-way flights from Chicago to Sydney
Search for one-way flight options from Chicago to Sydney. Find affordable one-way fares based on user searches. Data last updated June 12, 2025.

Tue 8/261:01 pmORD - SYD

2 stops34h 39mMultiple Airlines

Deal found 6/11

$454

Thu 8/2811:00 amMDW - SYD

2 stops29h 30mMultiple Airlines

Deal found 6/11

$629

Mon 8/117:00 amORD - SYD

2 stops33h 30mAlaska Airlines

Deal found 6/10

$674

Mon 8/117:03 pmORD - SYD

2 stops25h 42mFiji Airways

Deal found 6/11

$690

Mon 8/116:03 pmORD - SYD

1 stop22h 02mQantas Airways

Deal found 6/11

$777

Mon 9/17:10 amORD - SYD

2 stops45h 05mANA

Deal found 6/12

$811

Sun 8/2411:45 amORD - SYD

1 stop28h 45mAmerican Airlines

Deal found 6/11

$828

Mon 9/11:43 pmMDW - SYD

2 stops25h 52mDelta

Deal found 6/10

$836

Sun 7/2711:01 amORD - SYD

2 stops28h 34mDelta

Deal found 6/12

$934

Fri 7/257:40 pmORD - SYD

1 stop20h 20mUnited Airlines

Deal found 6/10

$999

Sun 8/101:30 amORD - SYD

1 stop37h 50mJapan Airlines

Deal found 6/11

$1,080

Mon 9/16:50 pmORD - SYD

3 stops46h 35mChina Southern

Deal found 6/11

$1,304

Cheapflights Fare Finder

Use the filters below to find and compare flights from Chicago to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 7/2

7:42 am-7:30 am

1 stop32h 48m

Sydney Kingsford Smith

Thu 7/17

5:45 pm-6:03 am

2 stops27h 18m

$1,045

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sat 8/16

6:20 pm-11:45 am

2 stops26h 25m

Sydney Kingsford Smith

Sat 8/23

1:45 pm-8:57 pm

2 stops22h 12m

$1,227

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 8/27

2:07 pm-7:30 am

2 stops26h 23m

Sydney Kingsford Smith

Wed 9/3

5:45 pm-7:03 am

2 stops28h 18m

$1,252

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 9/10

5:50 pm-8:45 am

2 stops23h 55m

Sydney Kingsford Smith

Wed 9/24

11:50 am-9:40 pm

2 stops24h 50m

$1,303

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 9/2

7:03 pm-7:30 am

1 stop21h 27m

Sydney Kingsford Smith

Tue 10/14

10:10 am-5:02 pm

1 stop22h 52m

$1,364

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 9/2

3:40 pm-7:20 am

1 stop24h 40m

Sydney Kingsford Smith

Wed 9/24

9:20 am-8:01 am

2 stops37h 41m

$1,372

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Sun 8/3

8:50 am-7:05 am

1 stop31h 15m

Sydney Kingsford Smith

Tue 8/19

9:10 am-5:43 pm

1 stop23h 33m

$1,429

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Tue 8/19

5:45 pm-9:25 am

1 stop24h 40m

Sydney Kingsford Smith

Sat 8/30

8:55 pm-2:48 pm

2 stops32h 53m

$1,432

ChicagoSydney

ORD - SYD

ORDSYD

Chicago O'Hare Intl

Wed 8/27

5:14 pm-7:05 am

2 stops22h 51m

Sydney Kingsford Smith

Wed 9/3

9:10 am-7:15 pm

1 stop25h 05m

$1,448

ChicagoSydney

MDW - SYD

MDWSYD

Chicago Midway

Wed 9/10

1:43 pm-6:35 am

2 stops25h 52m

Sydney Kingsford Smith

Wed 9/24

9:25 am-9:44 pm

2 stops27h 19m

$1,465

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 30 results

Best time to book a flight from Chicago to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Chicago with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago to Sydney

How far ahead should I book a flight from Chicago to Sydney?

The best time to book flights from Chicago to Sydney is 2 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Chicago to Sydney?

Currently, March is the cheapest month in which you can book a flight from Chicago to Sydney (average of $1,041). Flying from Chicago to Sydney in December is currently the most expensive (average of $1,635). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CHI to SYD?

A simple way to save on the total cost of your ticket is to fly from Chicago to Sydney in the morning. If you’re flexible enough to do this you can expect to save up to 14% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from Chicago to Sydney?

Travelers seeking maximum savings on their Chicago to Sydney flight should consider departing on Sunday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Sydney by month

In terms of precipitation, rainfall in Sydney ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Sydney when rainfall is around 2.0 in.

Temperature in Sydney by month

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Sydney

Read through reviews of airlines operating flights from Chicago to Sydney, such as Air Tahiti Nui, Korean Air and Japan Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Air Tahiti Nui

8.7

Very good

64 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

Air Tahiti Nui

8.7

Very good

64 reviews

Air Tahiti Nui

8.7

Very good

64 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Korean Air

8.4

Very good

1,088 reviews

Air Tahiti Nui

8.7

Very good

64 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Japan Airlines

8.3

Very good

1,490 reviews

Air Tahiti Nui

8.7

Very good

64 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

ANA

8.3

Very good

882 reviews

Air Tahiti Nui

8.7

Very good

64 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Fiji Airways

8.1

Very good

194 reviews

Air Tahiti Nui

8.7

Very good

64 reviews

Reviews

1 / 2

10.0

Excellent

Isabelle,Apr 2023

AKL - PPT

Related info for your journey

What airport do you fly into for flights to Sydney from Chicago?
Located just 4.6 mi from the city center, Sydney Kingsford Smith is the airport most travelers will use when flying to Sydney from Chicago. Booking flights from Chicago to Kingsford Smith (SYD) should be relatively easy as there are 0 daily inbound flights from Chicago from 8 different airlines.
What are the cheapest airlines flying from Chicago to Sydney round-trip?
Our cheapest airline available from Chicago to Sydney is Fiji Airways. Our recent data shows that you can find tickets from as low as $1,227 on this airline. Additional options worth looking into are Alaska Airlines and Air New Zealand, starting at $1,252 and $1,303 round-trip.
What are the cheapest airlines to fly from Chicago to Sydney one-way?
One-way options have recently been found by users for as low as $674 on Alaska Airlines. Other airlines that offer cheap prices include Fiji Airways from $690 and Qantas Airways from $777 one-way.
Where are the most common layover locations when flying from Chicago to Sydney?
Chicago to Sydney flights have a layover in Los Angeles most often. Los Angeles is followed by Vancouver in terms of the most popular layover location on flights from Chicago to Sydney.
What are some popular things to do or see while on a layover in Los Angeles?
The majority of Los Angeles visitors spend their time at Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live. Travelers on a layover in Los Angeles can visit Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live, by traveling 12.5 mi, 11.7 mi, and 10.8 mi, respectively after landing at Los Angeles. Travelers in need of a car in Los Angeles can rent one for about $40 per day.
What are some popular points of interest to see during a layover in Vancouver?
Pacific Central Station, Orpheum Theatre, and Capilano Suspension Bridge are currently the most popular points of interest in Vancouver at the moment. Those on a layover in Vancouver interested in visiting Pacific Central Station, Orpheum Theatre, or Capilano Suspension Bridge can do so by traveling 6.6 mi, 6.5 mi, and 10.6 mi, respectively from Vancouver Intl. Those landing in Vancouver looking to spend some time exploring during their layover can rent a car for about $50 per day.
Where are the least popular layover locations for Chicago to Sydney flights?
Chicago to Sydney flights have a layover in Dallas least often.
Can I find deals for flights from Chicago to Sydney that include hotel bookings?
Yes. In addition to deals on Chicago to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Chicago to Sydney?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Sydney.
Can I find deals for business class flights from Chicago to Sydney?
Yes. Cheapflights offers flight deals from Chicago to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Chicago to Sydney?
Currently, March is the cheapest month in which you can book a flight from Chicago to Sydney (average of $1,041). Flying from Chicago to Sydney in December is currently the most expensive (average of $1,635). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Coogee

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Other flights to Sydney

Top 8 airlines flying from Chicago to Sydney

Airline	Cheapest	Average	Flexibility	On-time
ANA	Cheapest$679	Average$1,144	FlexibilityNo cancel fee	On-time80%
Qantas Airways	Cheapest$813	Average$960	FlexibilityNo cancel fee	On-time74%
American Airlines	Cheapest$825	Average$870	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$852	Average$965	FlexibilityNo cancel fee	On-timeN/A
Fiji Airways	Cheapest$970	Average$1,181	FlexibilityNo cancel fee	On-time74%
Air Canada	Cheapest$972	Average$1,240	FlexibilityNo cancel fee	On-time67%
United Airlines	Cheapest$1,203	Average$1,467	FlexibilityNo cancel fee	On-time69%
Air New Zealand	Cheapest$1,275	Average$1,506	FlexibilityNo cancel fee	On-time78%

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$454+ Cheap flights from Chicago (CHI) to Sydney (SYD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Chicago to Sydney with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Chicago to Sydney Kingsford Smith are usually found in August or April, booked 2 days in advance, depart on a Saturday or Sunday and return on a Thursday

Cheap flight deals from Chicago to Sydney

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Chicago to Sydney

Cheapest flights from Chicago to SydneyExplore the most affordable flight options available from Chicago to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Explore the most affordable flight options available from Chicago to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Chicago to Sydney that are best for you.

Best time to book a flight from Chicago to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Chicago with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Chicago to Sydney

How far ahead should I book a flight from Chicago to Sydney?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Sydney. Price data was last updated on June 9, 2025.

What is the cheapest month to book a flight from Chicago to Sydney?

What is the cheapest time of day to fly from CHI to SYD?

Find hourly flight availability from Chicago to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

What is the cheapest day to fly from Chicago to Sydney?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Sydney. Price data was last updated on December 8, 2024.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated June 12, 2025.

Read through reviews of airlines operating flights from Chicago to Sydney, such as Air Tahiti Nui, Korean Air and Japan Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Sydney from Chicago?

What are the cheapest airlines flying from Chicago to Sydney round-trip?

What are the cheapest airlines to fly from Chicago to Sydney one-way?

Where are the most common layover locations when flying from Chicago to Sydney?

What are some popular things to do or see while on a layover in Los Angeles?

What are some popular points of interest to see during a layover in Vancouver?

Where are the least popular layover locations for Chicago to Sydney flights?

Can I find deals for flights from Chicago to Sydney that include hotel bookings?

How can I find direct flights from Chicago to Sydney?

Can I find deals for business class flights from Chicago to Sydney?

What is the cheapest month to book a flight from Chicago to Sydney?

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Alternative routes for Chicago to Sydney

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Top 8 airlines flying from Chicago to Sydney

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Cheapest flights from Chicago to Sydney
Explore the most affordable flight options available from Chicago to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.