$548+ Cheap flights from St. Louis (STL) 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 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
May 29 — Jun 51
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Sydney with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Sydney
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Best
Last-minute
One-way
Cheapest flights from St. Louis to SydneyExplore the most affordable flight options available from St. Louis to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.
Explore the most affordable flight options available from St. Louis to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.
This oojo deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:00 am
STL
- SYD
1 stop30h 25m
Qantas Airways
Sat 11/145:50 pm
SYD
- STL
2 stops35h 47m
Qantas Airways
Deal found 4/25![Qantas Airways logo]()
$1,135
This oojo deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:13 pm
STL
- SYD
2 stops33h 37m
Qantas Airways
Sun 12/611:15 am
SYD
- STL
1 stop29h 42m
Qantas Airways
Deal found 4/26![Qantas Airways logo]()
$1,144
This oojo deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:30 am
STL
- SYD
1 stop34h 30m
Qantas Airways
Mon 11/25:50 pm
SYD
- STL
2 stops35h 47m
Qantas Airways
Deal found 4/25![Qantas Airways logo]()
$1,287
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:06 pm
STL
- SYD
1 stop20h 49m
United Airlines
Mon 5/1810:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,303
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/411:42 am
STL
- SYD
2 stops28h 08m
Delta
Mon 5/189:15 am
SYD
- STL
2 stops24h 48m
Delta
Deal found 4/29![Delta logo]()
$1,308
This BusinessClass deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/97:23 pm
STL
- SYD
1 stop20h 32m
Air New Zealand
Tue 6/1610:20 am
SYD
- STL
1 stop22h 57m
Air New Zealand
Deal found 4/25![Air New Zealand logo]()
$1,356
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/76:00 am
STL
- SYD
2 stops36h 20m
Qantas Airways
Mon 9/1412:00 pm
SYD
- STL
1 stop21h 14m
Qantas Airways
Deal found 4/28![Qantas Airways logo]()
$1,365
This oojo deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:00 am
STL
- SYD
2 stops37h 55m
Qantas Airways
Sat 9/1212:00 pm
SYD
- STL
1 stop21h 14m
Qantas Airways
Deal found 4/28![Qantas Airways logo]()
$1,366
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/274:49 pm
STL
- SYD
2 stops23h 11m
United Airlines
Fri 5/1510:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 4/26![United Airlines logo]()
$1,371
Best flights from St. Louis to SydneyDiscover carefully curated flight deals from St. Louis to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
Discover carefully curated flight deals from St. Louis to Sydney that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Wed 6/1010:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,303
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/411:42 am
STL
- SYD
2 stops28h 08m
Delta
Mon 5/189:15 am
SYD
- STL
2 stops24h 48m
Delta
Deal found 4/29![Delta logo]()
$1,308
This Air Canada deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/91:05 pm
STL
- SYD
3 stops51h 15m
Air Canada
Tue 6/169:20 am
SYD
- STL
2 stops41h 46m
Air Canada
Deal found 4/25![Air Canada logo]()
$1,395
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:30 am
STL
- SYD
1 stop31h 25m
United Airlines
Mon 5/1810:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 4/25![United Airlines logo]()
$1,303
This United Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/84:44 pm
STL
- SYD
2 stops23h 16m
United Airlines
Fri 5/2210:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 4/24![United Airlines logo]()
$1,440
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/284:48 pm
STL
- SYD
2 stops23h 12m
United Airlines
Thu 6/49:30 am
SYD
- STL
2 stops23h 12m
United Airlines
Deal found 4/28![United Airlines logo]()
$1,444
Last-minute flights from St. Louis to SydneyDiscover last-minute flight deals from St. Louis to Sydney. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Sydney. Data last updated April 29, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:06 pm
STL
- SYD
1 stop20h 49m
United Airlines
Mon 5/1810:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,303
This Delta deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/411:42 am
STL
- SYD
2 stops28h 08m
Delta
Mon 5/189:15 am
SYD
- STL
2 stops24h 48m
Delta
Deal found 4/29![Delta logo]()
$1,308
This Air Canada deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/41:05 pm
STL
- SYD
3 stops51h 15m
Air Canada
Mon 5/189:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 4/28![Air Canada logo]()
$1,474
This Justfly.com deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/82:35 pm
STL
- SYD
2 stops25h 45m
Air Canada
Fri 5/229:20 am
SYD
- STL
2 stops29h 37m
Air Canada
Deal found 4/24![Air Canada logo]()
$1,421
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/284:48 pm
STL
- SYD
2 stops23h 07m
United Airlines
Thu 6/410:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 4/27![United Airlines logo]()
$1,439
This KAYAK deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:23 pm
STL
- SYD
1 stop20h 32m
Air New Zealand
Thu 6/410:20 am
SYD
- STL
1 stop22h 57m
Air New Zealand
Deal found 4/28![Air New Zealand logo]()
$1,492
One-way flights from St. Louis to SydneySearch for one-way flight options from St. Louis to Sydney. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
Search for one-way flight options from St. Louis to Sydney. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/98:08 pm
STL
- SYD
3 stops48h 57m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$548
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:00 am
STL
- SYD
2 stops33h 50m
Delta
Deal found 4/25![Delta logo]()
$755
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:11 pm
STL
- SYD
2 stops44h 44m
United Airlines
Deal found 4/25![United Airlines logo]()
$761
This Ovago deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:30 am
STL
- SYD
1 stop31h 25m
Air New Zealand
Deal found 4/25![Air New Zealand logo]()
$820
This Air Canada deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/91:05 pm
STL
- SYD
3 stops51h 15m
Air Canada
Deal found 4/25![Air Canada logo]()
$851
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/52:57 pm
STL
- SYD
2 stops25h 03m
United Airlines
Deal found 4/27![United Airlines logo]()
$923
This oojo deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/56:37 am
STL
- SYD
1 stop33h 28m
Qantas Airways
Deal found 4/27![Qantas Airways logo]()
$934
This Ovago deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:36 am
STL
- SYD
1 stop33h 29m
Qantas Airways
Deal found 4/25![Qantas Airways logo]()
$955
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/58:08 pm
STL
- SYD
3 stops56h 02m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$983
This Delta deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:21 am
STL
- SYD
2 stops33h 29m
Delta
Deal found 4/25![Delta logo]()
$1,008
This Kiwi.com deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/138:08 pm
STL
- SYD
3 stops59h 02m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$1,076
Find flight deals from St. Louis to Sydney
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,303 (United Airlines) |
One-way from | $548 (Kiwi.com) |
Popular in | December |
Cheapest in | March |
Average price | $1,391 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Sydney 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, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2026.
Use the filters below to find and compare flights from St. Louis to Sydney that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 6/1
7:23 pm-6:55 am
1 stop20h 32m
Sydney Kingsford Smith
Wed 6/10
10:20 am-6:17 pm
1 stop22h 57m
$1,303
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
8:30 am-6:55 am
1 stop31h 25m
Sydney Kingsford Smith
Mon 5/18
10:20 am-6:22 pm
1 stop23h 02m
$1,303
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
11:42 am-6:50 am
2 stops28h 08m
Sydney Kingsford Smith
Mon 5/18
9:15 am-7:03 pm
2 stops24h 48m
$1,308
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Tue 6/9
1:05 pm-7:20 am
3 stops51h 15m
Sydney Kingsford Smith
Tue 6/16
9:20 am-12:06 pm
2 stops41h 46m
$1,395
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Fri 5/8
4:44 pm-7:00 am
2 stops23h 16m
Sydney Kingsford Smith
Fri 5/22
10:20 am-6:17 pm
1 stop22h 57m
$1,440
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Thu 5/28
4:48 pm-7:00 am
2 stops23h 12m
Sydney Kingsford Smith
Thu 6/4
9:30 am-5:42 pm
2 stops23h 12m
$1,444
Cheapest one-way
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Tue 6/9
8:08 pm-12:05 pm
3 stops48h 57m
$548
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sat 5/9
7:11 pm-6:55 am
2 stops44h 44m
$761
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sat 5/9
8:30 am-6:55 am
1 stop31h 25m
$820
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sat 5/9
1:05 pm-7:20 am
3 stops51h 15m
$851
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Sydney
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Sydney in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars |
- Most accurate provider: When it comes to deals on St. Louis-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Sydney flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Sydney flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Sydney
Have a flexible travel schedule? Discover the best time to fly to Sydney from St. Louis with our price prediction graph.
STL-SYD
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 St. Louis to Sydney
What is the cheapest month to book a flight from St. Louis to Sydney?
Currently, March is the cheapest month in which you can book a flight from St. Louis to Sydney (average of $1,233). Flying from St. Louis to Sydney in December is currently the most expensive (average of $1,665). 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.
How much does it cost to fly round-trip from St. Louis to Sydney?
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 April 29, 2026.
Get a feel of what it's like to fly with Fiji Airways,Qantas Airways, andUnited Airlines from St. Louis to Sydney by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.1
Entertainment
7.5
Overall
8.1
Boarding
8.2
Crew
8.6
Food
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Overall
8.1
Boarding
8.2
Crew
8.6
Food
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Overall
8.1
Boarding
8.2
Crew
8.6
Food
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Overall
8.1
Boarding
8.2
Crew
8.6
Food
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Overall
8.1
Boarding
8.2
Crew
8.6
Food
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Sydney?
Book flights to Sydney if you plan to visit one of these locationsParramatta
Wollongong
Coogee
Manly
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St. Louis and Sydney flights
Browse other St. Louis and Sydney flight options. Last updated on April 29, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on April 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Sydney
Explore flights to Sydney departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 29, 2026.
Top 4 airlines flying from St. Louis to Sydney
Discover the top 4 airlines that operate flights from St. Louis to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$887 | Average$1,214 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,144 | Average$1,512 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,145 | Average$1,357 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,233 | Average$1,497 | FlexibilityNo cancel fee | On-time71% |