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Cheap flights from Illinois to Sydney from $747

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Sydney departing on 5/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
2:15 pm - 12:14 am
STL
-
YQY
7h 59m
1 stop
Air Canada Logo
5:00 am - 12:06 pm
YQY
-
STL
9h 06m
1 stop
$747Air Canada
Fri, May 8 - Fri, May 15
Air Canada Logo
8:45 am - 4:39 pm
ORD
-
YQY
5h 54m
1 stop
Air Canada Logo
5:00 am - 9:00 am
YQY
-
ORD
6h 00m
1 stop
$749Air Canada
Wed, Aug 5 - Sat, Aug 8
Air Canada Logo
8:45 am - 4:38 pm
ORD
-
YQY
5h 53m
1 stop
Air Canada Logo
5:20 pm - 9:00 am
YQY
-
ORD
17h 40m
2 stops
$777Air Canada
Sun, Sep 20 - Wed, Sep 23
Air Canada Logo
2:15 pm - 12:14 am
STL
-
YQY
7h 59m
1 stop
Air Canada Logo
5:20 pm - 12:06 pm
YQY
-
STL
20h 46m
2 stops
$792Air Canada
Fri, May 8 - Fri, May 15
Air Canada Logo
11:05 am - 12:45 am
ORD
-
YQY
11h 40m
2 stops
Air Canada Logo
5:05 am - 2:52 pm
YQY
-
ORD
11h 47m
2 stops
$836Air Canada
Sun, Sep 20 - Wed, Sep 23
Air Canada Logo
2:40 pm - 12:07 am
STL
-
YQY
7h 27m
1 stop
Air Canada Logo
5:00 am - 2:02 pm
YQY
-
STL
11h 02m
1 stop
$848Air Canada
Fri, Aug 14 - Mon, Aug 24
Air Canada Logo
8:55 am - 12:12 am
STL
-
YQY
13h 17m
1 stop
Air Canada Logo
5:00 am - 2:02 pm
YQY
-
STL
11h 02m
1 stop
$873Air Canada
Sat, Aug 15 - Mon, Aug 24
Air Canada Logo
2:40 pm - 12:07 am
STL
-
YQY
7h 27m
1 stop
Air Canada Logo
5:20 pm - 8:07 pm
YQY
-
STL
28h 47m
2 stops
$882Air Canada
Fri, Aug 14 - Thu, Aug 20
Air Canada Logo
2:40 pm - 12:12 am
STL
-
YQY
7h 32m
1 stop
Air Canada Logo
5:00 am - 2:02 pm
YQY
-
STL
11h 02m
1 stop
$884Air Canada
Sat, Aug 15 - Wed, Aug 19
Air Canada Logo
8:21 am - 12:14 am
STL
-
YQY
13h 53m
2 stops
Air Canada Logo
5:20 pm - 8:09 pm
YQY
-
STL
28h 49m
2 stops
$894Air Canada
Fri, May 8 - Fri, May 15

Air Canada flights from Illinois to Sydney, Nova Scotia

Our best Air Canada deals on Illinois to Sydney, Nova Scotia flight tickets
Air Canada
May 8
STL2:15 pmLambert-St Louis
7h 59m
1 stop
YQY12:14 amSydney
May 15
YQY5:00 amSydney
9h 06m
1 stop
STL12:06 pmLambert-St Louis
$747
Air Canada
Aug 5
ORD8:45 amChicago O'Hare Intl
5h 54m
1 stop
YQY4:39 pmSydney
Aug 8
YQY5:00 amSydney
6h 00m
1 stop
ORD9:00 amChicago O'Hare Intl
$749
Air Canada
Sep 20
ORD8:45 amChicago O'Hare Intl
5h 53m
1 stop
YQY4:38 pmSydney
Sep 23
YQY5:20 pmSydney
17h 40m
2 stops
ORD9:00 amChicago O'Hare Intl
$777

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Sydney, Nova Scotia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 24, 2026.
Use the filters below to find and compare flights from Illinois to Sydney, Nova Scotia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSydney

STL - YQY

STLYQY

Lambert-St Louis

Fri 5/8

2:15 pm-12:14 am

1 stop7h 59m

Sydney

Fri 5/15

5:00 am-12:06 pm

1 stop9h 06m

$747
Quickest round-trip

ChicagoSydney

ORD - YQY

ORDYQY

Chicago O'Hare Intl

Wed 8/5

8:45 am-4:39 pm

1 stop5h 54m

Sydney

Sat 8/8

5:00 am-9:00 am

1 stop6h 00m

$749

ChicagoSydney

ORD - YQY

ORDYQY

Chicago O'Hare Intl

Sun 9/20

8:45 am-4:38 pm

1 stop5h 53m

Sydney

Wed 9/23

5:20 pm-9:00 am

2 stops17h 40m

$777

St. LouisSydney

STL - YQY

STLYQY

Lambert-St Louis

Fri 5/8

2:15 pm-12:14 am

1 stop7h 59m

Sydney

Fri 5/15

5:20 pm-12:06 pm

2 stops20h 46m

$792

ChicagoSydney

ORD - YQY

ORDYQY

Chicago O'Hare Intl

Sun 9/20

11:05 am-12:45 am

2 stops11h 40m

Sydney

Wed 9/23

5:05 am-2:52 pm

2 stops11h 47m

$836

St. LouisSydney

STL - YQY

STLYQY

Lambert-St Louis

Fri 8/14

2:40 pm-12:07 am

1 stop7h 27m

Sydney

Mon 8/24

5:00 am-2:02 pm

1 stop11h 02m

$848

St. LouisSydney

STL - YQY

STLYQY

Lambert-St Louis

Sat 8/15

8:55 am-12:12 am

1 stop13h 17m

Sydney

Mon 8/24

5:00 am-2:02 pm

1 stop11h 02m

$873

St. LouisSydney

STL - YQY

STLYQY

Lambert-St Louis

Fri 8/14

2:40 pm-12:07 am

1 stop7h 27m

Sydney

Thu 8/20

5:20 pm-8:07 pm

2 stops28h 47m

$882

St. LouisSydney

STL - YQY

STLYQY

Lambert-St Louis

Sat 8/15

2:40 pm-12:12 am

1 stop7h 32m

Sydney

Wed 8/19

5:00 am-2:02 pm

1 stop11h 02m

$884

St. LouisSydney

STL - YQY

STLYQY

Lambert-St Louis

Fri 5/8

8:21 am-12:14 am

2 stops13h 53m

Sydney

Fri 5/15

5:20 pm-8:09 pm

2 stops28h 49m

$894

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Cheap Illinois to Sydney, Nova Scotia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Sydney, Nova Scotia

Fastest flight time

5h 53m

Direct flights

None
The fastest flight from Illinois to Sydney, Nova Scotia takes 5h 53m
There are no direct flights from Illinois to Sydney, Nova Scotia. There are no popular flight routes from Illinois to Sydney, Nova Scotia.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Sydney Airport?

    Prices for flights from Illinois to Sydney Airport refresh daily.

  • How old do you have to be to fly from Illinois to Sydney Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Sydney Airport.

  • What documentation or ID do you need to fly to Sydney Airport?

    The travel and health documents you'll need for your trip to Sydney Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sydney Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from Illinois to Sydney, Nova Scotia?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Illinois from Sydney, Nova Scotia. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Illinois to Sydney, Nova Scotia with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Cheticamp
Inverness

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Sydney?

Finding the right flight to Sydney from Illinois is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Sydney quick and easy, saving you time and money.

Can I find flights from Illinois to Sydney with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Illinois to Sydney flights to just show those with flexible booking policies.

How can momondo help me find flights from Illinois to Sydney?

momondo provides multiple filters to help you find the best flight to Sydney from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Illinois to Sydney right now. Can momondo alert me if prices change?

Price alerts on flights to Sydney from Illinois 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.

An easier way to manage your Sydney, Nova Scotia trip

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Find better results for your trip to Canada

Airports servicing Nova Scotia

Halifax Intl Airport