$586+ Cheap flights from St. Louis (STL) to Australia
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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Jun 17 — Jun 241
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to Australia 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 Australia
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to AustraliaExplore the most affordable flight options available from St. Louis to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 18, 2026.
Explore the most affordable flight options available from St. Louis to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 18, 2026.
This oojo deal was found by Cheapflights users on 5/18. 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.
Thu 11/196:13 pm
STL
- SYD
2 stops33h 37m
Qantas Airways
Sun 11/2211:15 am
SYD
- STL
1 stop29h 27m
Qantas Airways
Deal found 5/18![Qantas Airways logo]()
$1,023
This oojo deal was found by Cheapflights users on 5/15. 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.
Thu 12/36:13 pm
STL
- MEL
2 stops28h 22m
Qantas Airways
Thu 12/1011:15 pm
MEL
- STL
1 stop41h 42m
Qantas Airways
Deal found 5/15![Qantas Airways logo]()
$1,069
This American Airlines deal was found by Cheapflights users on 5/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/35:14 am
STL
- MEL
1 stop30h 46m
American Airlines
Thu 12/1011:15 pm
MEL
- STL
2 stops26h 35m
American Airlines
Deal found 5/16![American Airlines logo]()
$1,087
This oojo deal was found by Cheapflights users on 5/13. 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 10/266:30 am
STL
- MEL
1 stop35h 00m
Qantas Airways
Mon 11/91:55 pm
MEL
- STL
2 stops39h 42m
Qantas Airways
Deal found 5/13![Qantas Airways logo]()
$1,088
This American Airlines deal was found by Cheapflights users on 5/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:30 am
STL
- MEL
1 stop35h 00m
American Airlines
Mon 11/911:15 pm
MEL
- STL
2 stops26h 43m
American Airlines
Deal found 5/16![American Airlines logo]()
$1,096
This oojo deal was found by Cheapflights users on 5/13. 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 11/77:00 am
STL
- SYD
1 stop33h 00m
Qantas Airways
Thu 11/125:50 pm
SYD
- STL
2 stops35h 47m
Qantas Airways
Deal found 5/13![Qantas Airways logo]()
$1,096
This Delta deal was found by Cheapflights users on 5/13. 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 10/261:30 pm
STL
- MEL
2 stops27h 20m
Delta
Mon 11/912:00 pm
MEL
- STL
2 stops28h 39m
Delta
Deal found 5/13![Delta logo]()
$1,106
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Wed 6/107:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Tue 6/1610:00 am
MEL
- STL
2 stops47h 17m
United Airlines
Deal found 5/14![United Airlines logo]()
$1,115
This oojo deal was found by Cheapflights users on 5/17. 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 10/206:30 am
STL
- SYD
1 stop33h 35m
Qantas Airways
Thu 10/295:50 pm
SYD
- STL
2 stops38h 52m
Qantas Airways
Deal found 5/17![Qantas Airways logo]()
$1,173
This Air Canada deal was found by Cheapflights users on 5/17. 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.
Sun 6/141:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Sun 6/219:20 am
SYD
- STL
2 stops50h 05m
Air Canada
Deal found 5/17![Air Canada logo]()
$1,192
This Air Canada deal was found by Cheapflights users on 5/17. 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.
Wed 7/228:55 am
STL
- SYD
2 stops31h 25m
Air Canada
Mon 7/279:20 am
SYD
- STL
2 stops48h 22m
Air Canada
Deal found 5/17![Air Canada logo]()
$1,196
This Justfly.com deal was found by Cheapflights users on 5/18. 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.
Wed 6/32:15 pm
STL
- SYD
2 stops26h 05m
Air Canada
Sun 6/79:20 am
SYD
- STL
2 stops41h 56m
Air Canada
Deal found 5/18![Air Canada logo]()
$1,211
Best flights from St. Louis to AustraliaDiscover carefully curated flight deals from St. Louis to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 18, 2026.
Discover carefully curated flight deals from St. Louis to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 18, 2026.
This oojo deal was found by Cheapflights users on 5/13. 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 10/266:30 am
STL
- MEL
1 stop35h 00m
Qantas Airways
Mon 11/91:55 pm
MEL
- STL
2 stops39h 42m
Qantas Airways
Deal found 5/13![Qantas Airways logo]()
$1,088
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Wed 6/107:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Tue 6/1610:00 am
MEL
- STL
2 stops47h 17m
United Airlines
Deal found 5/14![United Airlines logo]()
$1,115
This FlightHub deal was found by Cheapflights users on 5/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:10 pm
STL
- BNE
2 stops27h 55m
Air Canada
Mon 8/3110:00 am
BNE
- STL
2 stops43h 02m
Air Canada
Deal found 5/17![Air Canada logo]()
$1,419
This KAYAK deal was found by Cheapflights users on 5/17. 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.
Tue 6/27:23 pm
STL
- CBR
2 stops25h 42m
Multiple Airlines
Tue 6/97:15 am
CBR
- STL
2 stops26h 02m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$1,427
This Ovago deal was found by Cheapflights users on 5/17. 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.
Thu 7/26:01 am
STL
- SYD
1 stop33h 54m
Air New Zealand
Thu 7/910:20 am
SYD
- STL
1 stop22h 57m
Air New Zealand
Deal found 5/17![Air New Zealand logo]()
$1,433
This Delta deal was found by Cheapflights users on 5/16. 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 6/157:08 am
STL
- SYD
2 stops32h 42m
Delta
Mon 6/229:15 am
SYD
- STL
2 stops30h 28m
Delta
Deal found 5/16![Delta logo]()
$1,510
This Qatar Airways deal was found by Cheapflights users on 5/15. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:37 am
STL
- MEL
2 stops43h 13m
Qatar Airways
Sun 7/510:45 pm
MEL
- STL
2 stops40h 14m
Qatar Airways
Deal found 5/15![Qatar Airways logo]()
$2,262
This United Airlines deal was found by Cheapflights users on 5/13. 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 10/268:30 am
STL
- MEL
1 stop32h 30m
United Airlines
Mon 11/91:00 pm
MEL
- STL
1 stop26h 00m
United Airlines
Deal found 5/13![United Airlines logo]()
$1,279
This Air Canada deal was found by Cheapflights users on 5/13. 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 10/264:15 pm
STL
- AVV
3 stops63h 00m
Multiple Airlines
Mon 11/98:55 pm
AVV
- STL
3 stops59h 35m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$1,443
This Qantas Airways deal was found by Cheapflights users on 5/16. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:11 pm
STL
- SYD
2 stops23h 49m
Qantas Airways
Wed 10/76:50 pm
SYD
- STL
1 stop20h 15m
Qantas Airways
Deal found 5/16![Qantas Airways logo]()
$1,447
This Air Canada deal was found by Cheapflights users on 5/13. 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.
Sun 7/2612:10 pm
STL
- BNE
2 stops51h 55m
Air Canada
Sun 8/2310:00 am
BNE
- STL
2 stops47h 42m
Air Canada
Deal found 5/13![Air Canada logo]()
$1,479
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Wed 8/2611:15 am
STL
- SYD
2 stops28h 40m
United Airlines
Sat 9/129:30 am
SYD
- STL
2 stops29h 20m
United Airlines
Deal found 5/14![United Airlines logo]()
$1,387
This Delta deal was found by Cheapflights users on 5/15. 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 7/73:57 pm
STL
- SYD
2 stops23h 53m
Delta
Fri 7/179:15 am
SYD
- STL
2 stops22h 31m
Delta
Deal found 5/15![Delta logo]()
$1,560
This United Airlines deal was found by Cheapflights users on 5/18. 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 7/96:00 am
STL
- SYD
2 stops34h 00m
United Airlines
Wed 7/2210:20 am
SYD
- STL
2 stops26h 06m
United Airlines
Deal found 5/18![United Airlines logo]()
$1,388
This oojo deal was found by Cheapflights users on 5/14. 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 8/36:37 am
STL
- BNE
1 stop31h 23m
Qantas Airways
Mon 8/312:25 pm
BNE
- STL
2 stops23h 30m
Qantas Airways
Deal found 5/14![Qantas Airways logo]()
$1,610
This Air Canada deal was found by Cheapflights users on 5/17. 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 8/312:10 pm
STL
- BNE
2 stops27h 55m
Multiple Airlines
Mon 8/318:40 pm
BNE
- STL
3 stops38h 27m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$1,626
This Delta deal was found by Cheapflights users on 5/15. 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.
Sat 7/1111:18 am
STL
- SYD
2 stops28h 32m
Delta
Thu 7/169:15 am
SYD
- STL
2 stops22h 31m
Delta
Deal found 5/15![Delta logo]()
$1,720
This United Airlines deal was found by Cheapflights users on 5/17. 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 7/26:01 am
STL
- SYD
2 stops33h 54m
United Airlines
Thu 7/910:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/17![United Airlines logo]()
$1,433
This oojo deal was found by Cheapflights users on 5/14. 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 6/132:58 pm
STL
- PER
2 stops42h 12m
Qantas Airways
Sat 6/209:05 am
PER
- STL
2 stops51h 51m
Qantas Airways
Deal found 5/14![Qantas Airways logo]()
$1,675
This Ovago deal was found by Cheapflights users on 5/18. 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 6/157:23 pm
STL
- PER
2 stops34h 02m
Multiple Airlines
Mon 6/2211:45 pm
PER
- STL
2 stops31h 32m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$1,711
This United Airlines deal was found by Cheapflights users on 5/16. 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 6/137:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Sat 6/2010:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/16![United Airlines logo]()
$1,433
This oojo deal was found by Cheapflights users on 5/14. 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.
Fri 5/297:20 pm
STL
- PER
2 stops61h 50m
Qantas Airways
Sat 6/64:25 pm
PER
- STL
2 stops44h 31m
Qantas Airways
Deal found 5/14![Qantas Airways logo]()
$1,675
This Air Canada deal was found by Cheapflights users on 5/13. 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 10/264:15 pm
STL
- MEL
3 stops52h 10m
Multiple Airlines
Mon 11/97:25 am
MEL
- STL
3 stops49h 05m
Multiple Airlines
Deal found 5/13![Multiple Airlines logo]()
$1,718
This United Airlines deal was found by Cheapflights users on 5/17. 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.
Wed 7/16:01 am
STL
- CBR
3 stops40h 14m
United Airlines
Wed 7/88:10 am
CBR
- STL
2 stops25h 07m
United Airlines
Deal found 5/17![United Airlines logo]()
$1,443
This Air New Zealand deal was found by Cheapflights users on 5/16. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1311:35 am
STL
- SYD
3 stops29h 10m
Multiple Airlines
Wed 11/1811:45 am
SYD
- STL
3 stops28h 09m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$1,750
This United Airlines deal was found by Cheapflights users on 5/17. 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 6/147:23 pm
STL
- CBR
2 stops31h 47m
United Airlines
Sun 6/217:15 am
CBR
- STL
3 stops47h 31m
United Airlines
Deal found 5/17![United Airlines logo]()
$1,460
This Priceline deal was found by Cheapflights users on 5/14. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/12:15 pm
STL
- PER
3 stops34h 20m
Multiple Airlines
Sat 6/61:15 pm
PER
- STL
3 stops47h 42m
Multiple Airlines
Deal found 5/14![Multiple Airlines logo]()
$1,754
This oojo deal was found by Cheapflights users on 5/16. 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 10/266:51 pm
STL
- AVV
2 stops28h 59m
Qantas Airways
Mon 11/98:10 am
AVV
- STL
2 stops25h 30m
Qantas Airways
Deal found 5/16![Qantas Airways logo]()
$1,949
This United Airlines deal was found by Cheapflights users on 5/15. 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 7/57:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Tue 7/1410:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/15![United Airlines logo]()
$1,472
This Gotogate deal was found by Cheapflights users on 5/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/294:48 pm
STL
- PER
3 stops33h 57m
Air Canada
Sat 6/65:15 pm
PER
- STL
3 stops43h 42m
Air Canada
Deal found 5/14![Air Canada logo]()
$2,629
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated May 18, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated May 18, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/15. 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.
Wed 5/202:35 pm
STL
- SYD
2 stops25h 25m
United Airlines
Wed 5/2710:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/15![United Airlines logo]()
$1,338
This CheapOair deal was found by Cheapflights users on 5/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/261:38 pm
STL
- SYD
2 stops26h 42m
Air Canada
Wed 6/109:20 am
SYD
- STL
2 stops29h 37m
Air Canada
Deal found 5/16![Air Canada logo]()
$1,305
This Expedia deal was found by Cheapflights users on 5/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/315:10 am
STL
- SYD
2 stops35h 10m
Air Canada
Sat 6/69:20 am
SYD
- STL
2 stops29h 37m
Air Canada
Deal found 5/17![Air Canada logo]()
$1,399
This Justfly.com deal was found by Cheapflights users on 5/18. 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.
Wed 6/32:15 pm
STL
- SYD
2 stops26h 05m
Air Canada
Sun 6/79:20 am
SYD
- STL
2 stops41h 56m
Air Canada
Deal found 5/18![Air Canada logo]()
$1,211
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Wed 6/107:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Tue 6/1610:00 am
MEL
- STL
2 stops47h 17m
United Airlines
Deal found 5/14![United Airlines logo]()
$1,115
This CheapOair deal was found by Cheapflights users on 5/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/105:10 am
STL
- SYD
2 stops35h 10m
Air Canada
Wed 6/179:20 am
SYD
- STL
2 stops53h 37m
Air Canada
Deal found 5/17![Air Canada logo]()
$1,313
This KAYAK deal was found by Cheapflights users on 5/17. 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.
Wed 6/107:23 pm
STL
- SYD
1 stop20h 32m
Air New Zealand
Wed 6/1710:20 am
SYD
- STL
1 stop22h 57m
Air New Zealand
Deal found 5/17![Air New Zealand logo]()
$1,332
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Wed 6/101:13 pm
STL
- SYD
2 stops26h 42m
United Airlines
Wed 6/1710:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/14![United Airlines logo]()
$1,337
This CheapOair deal was found by Cheapflights users on 5/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/132:15 pm
STL
- SYD
2 stops50h 05m
Air Canada
Fri 6/199:20 am
SYD
- STL
2 stops29h 37m
Air Canada
Deal found 5/17![Air Canada logo]()
$1,359
This Air Canada deal was found by Cheapflights users on 5/17. 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.
Sun 6/141:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Sun 6/219:20 am
SYD
- STL
2 stops50h 05m
Air Canada
Deal found 5/17![Air Canada logo]()
$1,192
This American Airlines deal was found by Cheapflights users on 5/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/146:35 am
STL
- SYD
1 stop33h 30m
American Airlines
Sun 6/219:10 am
SYD
- STL
1 stop29h 46m
American Airlines
Deal found 5/17![American Airlines logo]()
$1,371
This American Airlines deal was found by Cheapflights users on 5/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/221:19 pm
STL
- MEL
1 stop24h 41m
American Airlines
Mon 6/291:35 pm
MEL
- STL
1 stop23h 02m
American Airlines
Deal found 5/14![American Airlines logo]()
$1,382
One-way flights from St. Louis to AustraliaSearch for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated May 18, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated May 18, 2026.
This American Airlines deal was found by Cheapflights users on 5/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2112:45 pm
STL
- MEL
2 stops27h 00m
American Airlines
Deal found 5/16![American Airlines logo]()
$586
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Sat 8/228:08 pm
STL
- BNE
2 stops41h 52m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$661
This oojo deal was found by Cheapflights users on 5/15. 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 5/255:18 pm
STL
- HBA
2 stops36h 07m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$676
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Sat 8/223:33 pm
STL
- MEL
3 stops51h 02m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$713
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Sat 8/228:08 pm
STL
- AVV
3 stops59h 42m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$713
This SmartFares deal was found by Cheapflights users on 5/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/266:35 am
STL
- HBA
2 stops46h 50m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$716
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Fri 8/218:08 pm
STL
- AVV
3 stops59h 42m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$725
This Kiwi.com deal was found by Cheapflights users on 5/15. 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 7/73:34 pm
STL
- BNE
2 stops28h 06m
Multiple Airlines
Deal found 5/15![Multiple Airlines logo]()
$758
This Kiwi.com deal was found by Cheapflights users on 5/16. 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.
Fri 8/218:08 pm
STL
- MEL
3 stops47h 17m
Multiple Airlines
Deal found 5/16![Multiple Airlines logo]()
$770
This Kiwi.com deal was found by Cheapflights users on 5/18. 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.
Sat 6/207:38 pm
STL
- HBA
3 stops47h 37m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$797
This United Airlines deal was found by Cheapflights users on 5/17. 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 7/27:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Deal found 5/17![United Airlines logo]()
$821
This Kiwi.com deal was found by Cheapflights users on 5/18. 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 6/167:46 pm
STL
- HBA
3 stops57h 39m
Multiple Airlines
Deal found 5/18![Multiple Airlines logo]()
$835
Find flight deals from St. Louis to Australia
Keep the following information in mind while searching for St. Louis to Australia flight deals. Data was last updated May 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $946 (oojo) |
One-way from | $586 (American Airlines) |
Popular in | December |
Cheapest in | March |
Average price | $1,341 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Australia 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 May 18, 2026.
Use the filters below to find and compare flights from St. Louis to Australia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Mon 10/26
6:30 am-9:30 am
1 stop35h 00m
Melbourne
Mon 11/9
1:55 pm-12:37 pm
2 stops39h 42m
$1,088
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Wed 6/10
7:23 pm-8:15 am
1 stop21h 52m
Melbourne
Tue 6/16
10:00 am-6:17 pm
2 stops47h 17m
$1,115
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Mon 10/26
8:30 am-9:00 am
1 stop32h 30m
Melbourne
Mon 11/9
1:00 pm-10:00 pm
1 stop26h 00m
$1,279
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 8/26
11:15 am-6:55 am
2 stops28h 40m
Sydney Kingsford Smith
Sat 9/12
9:30 am-11:50 pm
2 stops29h 20m
$1,387
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Thu 7/9
6:00 am-7:00 am
2 stops34h 00m
Sydney Kingsford Smith
Wed 7/22
10:20 am-9:26 pm
2 stops26h 06m
$1,388
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Mon 8/3
12:10 pm-7:05 am
2 stops27h 55m
Brisbane
Mon 8/31
10:00 am-2:02 pm
2 stops43h 02m
$1,419
St. LouisCanberra
STL - CBR
STLCBR
Lambert-St Louis
Tue 6/2
7:23 pm-12:05 pm
2 stops25h 42m
Canberra
Tue 6/9
7:15 am-6:17 pm
2 stops26h 02m
$1,427
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Thu 7/2
6:01 am-6:55 am
1 stop33h 54m
Sydney Kingsford Smith
Thu 7/9
10:20 am-6:17 pm
1 stop22h 57m
$1,433
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Thu 7/2
6:01 am-6:55 am
2 stops33h 54m
Sydney Kingsford Smith
Thu 7/9
10:20 am-6:17 pm
1 stop22h 57m
$1,433
Quickest round-trip
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sat 6/13
7:23 pm-6:55 am
1 stop20h 32m
Sydney Kingsford Smith
Sat 6/20
10:20 am-6:17 pm
1 stop22h 57m
$1,433
Showing 1-10 of 49 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Australia
Have a flexible travel schedule? Discover the best time to fly to Australia from St. Louis with our price prediction graph.
STL-MEL
STL-BNE
STL-CBR
STL-SYD
STL-AVV
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 Australia
STL-AU0
STL-MEL
STL-BNE
STL-CBR
STL-SYD
What is the cheapest month to book a flight from St. Louis to Australia?
Currently, May is the cheapest month in which you can book a flight from St. Louis to Australia (average of $310). Flying from St. Louis to Australia in June is currently the most expensive (average of $1,225). 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.
Reviews of airlines servicing Australia
Get insights into the airlines that provide service to Australia. 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 Australia. Reviews last updated May 18, 2026.
Read reviews from past customers who have flown Fiji Airways,Qantas Airways, andUnited Airlines from St. Louis to Australia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.1
Entertainment
7.5
Crew
8.6
Boarding
8.2
Overall
8.1
Food
7.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Crew
8.6
Boarding
8.2
Overall
8.1
Food
7.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Crew
8.6
Boarding
8.2
Overall
8.1
Food
7.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Crew
8.6
Boarding
8.2
Overall
8.1
Food
7.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Crew
8.6
Boarding
8.2
Overall
8.1
Food
7.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Crew
8.6
Boarding
8.2
Overall
8.1
Food
7.6
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 Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top regions
Alternative routes for St. Louis to Australia
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Australia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Australia by cabin class
Find flights from St. Louis to Australia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Australia flights
Browse other St. Louis and Australia flight options. Last updated on May 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Fly to Australia regions
Consider these flights traveling to Australia regions.
Top 5 airlines flying from St. Louis to Australia
Discover the top 5 airlines that operate flights from St. Louis to Australia. 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 May 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$887 | Average$1,264 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$998 | Average$1,324 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,429 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,365 | FlexibilityNo cancel fee | On-time71% |