$525+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Apr 17 — Apr 241
Round-trip
1 adult, Economy
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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
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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 March 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 March 18, 2026.
This Air Canada deal was found by Cheapflights users on 3/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:40 pm
STL
- BNE
2 stops25h 25m
Multiple Airlines
Wed 5/610:00 am
BNE
- STL
2 stops25h 25m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$926
This Air Canada deal was found by Cheapflights users on 3/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Tue 5/510:00 am
BNE
- STL
2 stops49h 25m
Air Canada
Deal found 3/14![Air Canada logo]()
$932
This Air Canada deal was found by Cheapflights users on 3/13. 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 4/274:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Mon 5/48:45 pm
BNE
- STL
3 stops38h 19m
Air Canada
Deal found 3/13![Air Canada logo]()
$967
This Air Canada deal was found by Cheapflights users on 3/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/294:05 pm
STL
- BNE
3 stops55h 25m
Air Canada
Wed 5/610:00 am
BNE
- STL
2 stops25h 25m
Air Canada
Deal found 3/15![Air Canada logo]()
$994
This Expedia deal was found by Cheapflights users on 3/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/304:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Thu 5/710:00 am
BNE
- STL
2 stops25h 25m
Air Canada
Deal found 3/16![Air Canada logo]()
$998
This Air Canada deal was found by Cheapflights users on 3/16. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/11:00 pm
STL
- BNE
2 stops51h 05m
Air Canada
Fri 5/810:00 am
BNE
- STL
2 stops25h 25m
Air Canada
Deal found 3/16![Air Canada logo]()
$1,002
This Air Canada deal was found by Cheapflights users on 3/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/41:00 pm
STL
- SYD
2 stops51h 20m
Air Canada
Mon 5/189:20 am
SYD
- STL
2 stops50h 05m
Air Canada
Deal found 3/14![Air Canada logo]()
$1,101
This Air Canada deal was found by Cheapflights users on 3/13. 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 4/274:05 pm
STL
- SYD
2 stops48h 15m
Air Canada
Mon 5/49:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 3/13![Air Canada logo]()
$1,107
This Air Canada deal was found by Cheapflights users on 3/17. 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 5/111:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Mon 5/189:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 3/17![Air Canada logo]()
$1,108
This Air Canada deal was found by Cheapflights users on 3/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/101:00 pm
STL
- SYD
2 stops51h 20m
Air Canada
Thu 5/289:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 3/15![Air Canada logo]()
$1,109
This Air Canada deal was found by Cheapflights users on 3/17. 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 9/612:10 pm
STL
- SYD
2 stops28h 10m
Air Canada
Wed 9/169:20 am
SYD
- STL
2 stops48h 21m
Air Canada
Deal found 3/17![Air Canada logo]()
$1,115
This Air Canada deal was found by Cheapflights users on 3/13. 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.
Tue 10/1312:10 pm
STL
- SYD
2 stops28h 10m
Air Canada
Fri 10/2310:20 am
SYD
- STL
2 stops48h 06m
Air Canada
Deal found 3/13![Air Canada logo]()
$1,117
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 March 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 March 18, 2026.
This Air Canada deal was found by Cheapflights users on 3/13. 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 4/274:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Mon 5/48:45 pm
BNE
- STL
3 stops38h 19m
Air Canada
Deal found 3/13![Air Canada logo]()
$967
This Air Canada deal was found by Cheapflights users on 3/17. 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.
Sat 9/122:40 pm
STL
- AVV
3 stops34h 25m
Multiple Airlines
Tue 9/228:55 pm
AVV
- STL
3 stops38h 05m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$1,150
This lastminute.com deal was found by Cheapflights users on 3/13. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/276:21 am
STL
- BNE
1 stop31h 39m
Qantas Airways
Mon 5/49:10 am
BNE
- STL
2 stops25h 20m
Qantas Airways
Deal found 3/13![Qantas Airways logo]()
$1,206
This United Airlines deal was found by Cheapflights users on 3/14. 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 8/123:02 pm
STL
- MEL
2 stops25h 28m
United Airlines
Sun 8/2310:55 am
MEL
- STL
1 stop22h 29m
United Airlines
Deal found 3/14![United Airlines logo]()
$1,332
This American Airlines deal was found by Cheapflights users on 3/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:21 am
STL
- BNE
1 stop31h 39m
American Airlines
Sat 5/98:35 pm
BNE
- STL
2 stops26h 55m
American Airlines
Deal found 3/18![American Airlines logo]()
$1,358
This Delta deal was found by Cheapflights users on 3/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/19:59 am
STL
- MEL
2 stops30h 51m
Delta
Fri 5/810:00 am
MEL
- STL
2 stops26h 29m
Delta
Deal found 3/17![Delta logo]()
$1,392
This Kissandfly.com deal was found by Cheapflights users on 3/15. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/308:30 am
STL
- MEL
1 stop32h 45m
Lufthansa
Thu 5/710:55 am
MEL
- STL
1 stop45h 02m
Lufthansa
Deal found 3/15![Lufthansa logo]()
$1,461
This lastminute.com deal was found by Cheapflights users on 3/15. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:00 am
STL
- PER
2 stops45h 00m
Air New Zealand
Wed 5/67:50 pm
PER
- STL
2 stops39h 40m
Air New Zealand
Deal found 3/15![Air New Zealand logo]()
$1,598
This Qatar Airways deal was found by Cheapflights users on 3/17. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/129:46 am
STL
- PER
2 stops43h 49m
Qatar Airways
Wed 9/1610:45 pm
PER
- STL
2 stops34h 18m
Qatar Airways
Deal found 3/17![Qatar Airways logo]()
$2,069
This Gotogate deal was found by Cheapflights users on 3/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/28:55 am
STL
- BNE
2 stops55h 10m
Air Canada
Wed 7/1510:00 am
BNE
- STL
2 stops43h 02m
Air Canada
Deal found 3/15![Air Canada logo]()
$1,234
This Air Canada deal was found by Cheapflights users on 3/13. 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.
Fri 4/104:05 pm
STL
- MEL
3 stops52h 15m
Multiple Airlines
Fri 4/176:00 am
MEL
- STL
3 stops48h 25m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$1,285
This United Airlines deal was found by Cheapflights users on 3/16. 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.
Thu 4/306:00 am
STL
- MEL
2 stops35h 15m
United Airlines
Thu 5/710:55 am
MEL
- STL
1 stop22h 27m
United Airlines
Deal found 3/16![United Airlines logo]()
$1,336
This Priceline deal was found by Cheapflights users on 3/15. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/294:05 pm
STL
- AVV
3 stops63h 45m
Multiple Airlines
Wed 5/68:40 pm
AVV
- STL
3 stops35h 17m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$1,302
This United Airlines deal was found by Cheapflights users on 3/15. 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 4/296:00 am
STL
- MEL
2 stops34h 30m
United Airlines
Wed 5/69:30 am
MEL
- STL
2 stops28h 15m
United Airlines
Deal found 3/15![United Airlines logo]()
$1,336
This oojo deal was found by Cheapflights users on 3/14. 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 4/114:49 pm
STL
- BNE
2 stops27h 16m
Air New Zealand
Sat 4/187:35 pm
BNE
- STL
2 stops41h 53m
Air New Zealand
Deal found 3/14![Air New Zealand logo]()
$1,614
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Sun 5/314:48 pm
STL
- SYD
2 stops23h 12m
United Airlines
Tue 6/2310:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 3/14![United Airlines logo]()
$1,339
This Air New Zealand deal was found by Cheapflights users on 3/15. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/123:02 pm
STL
- MEL
2 stops28h 53m
Multiple Airlines
Sun 8/238:35 am
MEL
- STL
3 stops30h 15m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$1,364
This oojo deal was found by Cheapflights users on 3/17. 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.
Mon 5/46:11 pm
STL
- CNS
2 stops27h 44m
Qantas Airways
Sun 8/96:50 am
CNS
- STL
2 stops55h 18m
Qantas Airways
Deal found 3/17![Qantas Airways logo]()
$1,683
This Delta deal was found by Cheapflights users on 3/15. 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.
Sun 4/1911:42 am
STL
- SYD
2 stops28h 08m
Delta
Sat 4/259:15 am
SYD
- STL
2 stops20h 46m
Delta
Deal found 3/15![Delta logo]()
$1,766
This United Airlines deal was found by Cheapflights users on 3/13. 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.
Sun 9/134:40 pm
STL
- SYD
2 stops23h 20m
United Airlines
Tue 10/611:20 am
SYD
- STL
1 stop22h 33m
United Airlines
Deal found 3/13![United Airlines logo]()
$1,464
This Qantas Airways deal was found by Cheapflights users on 3/14. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/93:38 pm
STL
- SYD
2 stops25h 22m
Qantas Airways
Wed 5/1312:00 pm
SYD
- STL
1 stop20h 21m
Qantas Airways
Deal found 3/14![Qantas Airways logo]()
$1,846
This Qantas Airways deal was found by Cheapflights users on 3/15. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/272:36 pm
STL
- BNE
3 stops29h 54m
Multiple Airlines
Sun 7/58:45 am
BNE
- STL
2 stops22h 48m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$1,605
This United Airlines deal was found by Cheapflights users on 3/13. 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 9/143:10 pm
STL
- SYD
2 stops24h 50m
United Airlines
Wed 9/3010:20 am
SYD
- STL
1 stop22h 33m
United Airlines
Deal found 3/13![United Airlines logo]()
$1,464
This oojo deal was found by Cheapflights users on 3/15. 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.
Sun 7/266:36 am
STL
- AVV
2 stops40h 34m
Qantas Airways
Wed 9/96:00 am
AVV
- STL
2 stops27h 21m
Qantas Airways
Deal found 3/15![Qantas Airways logo]()
$1,847
This United Airlines deal was found by Cheapflights users on 3/13. 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.
Sun 9/134:40 pm
STL
- SYD
2 stops23h 20m
United Airlines
Wed 9/3010:20 am
SYD
- STL
1 stop22h 33m
United Airlines
Deal found 3/13![United Airlines logo]()
$1,464
This Qatar Airways deal was found by Cheapflights users on 3/14. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:23 am
STL
- CBR
3 stops54h 57m
Qatar Airways
Wed 8/1912:10 pm
CBR
- STL
3 stops50h 49m
Qatar Airways
Deal found 3/14![Qatar Airways logo]()
$2,411
This oojo deal was found by Cheapflights users on 3/15. 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.
Wed 8/126:30 am
STL
- AVV
2 stops42h 35m
Qantas Airways
Sun 8/236:00 am
AVV
- STL
2 stops25h 51m
Qantas Airways
Deal found 3/15![Qantas Airways logo]()
$1,848
This CheapOair deal was found by Cheapflights users on 3/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/196:21 am
STL
- SYD
1 stop33h 44m
Multiple Airlines
Sat 4/259:20 am
SYD
- STL
2 stops26h 34m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$1,691
This United Airlines deal was found by Cheapflights users on 3/13. 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.
Sun 9/134:40 pm
STL
- SYD
2 stops23h 20m
United Airlines
Sat 10/310:20 am
SYD
- STL
1 stop22h 33m
United Airlines
Deal found 3/13![United Airlines logo]()
$1,464
This Qatar Airways deal was found by Cheapflights users on 3/17. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/169:23 am
STL
- CBR
3 stops54h 57m
Qatar Airways
Thu 8/2012:10 pm
CBR
- STL
3 stops50h 49m
Qatar Airways
Deal found 3/17![Qatar Airways logo]()
$2,443
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated March 18, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated March 18, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 3/13. 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 4/274:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Mon 5/48:45 pm
BNE
- STL
3 stops38h 19m
Air Canada
Deal found 3/13![Air Canada logo]()
$967
This Air Canada deal was found by Cheapflights users on 3/13. 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 4/274:05 pm
STL
- SYD
2 stops48h 15m
Air Canada
Mon 5/49:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 3/13![Air Canada logo]()
$1,107
This oojo deal was found by Cheapflights users on 3/13. 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 4/276:21 am
STL
- SYD
2 stops44h 19m
Qantas Airways
Mon 5/412:00 pm
SYD
- STL
1 stop22h 30m
Qantas Airways
Deal found 3/13![Qantas Airways logo]()
$1,239
This Air Canada deal was found by Cheapflights users on 3/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Tue 5/510:00 am
BNE
- STL
2 stops49h 25m
Air Canada
Deal found 3/14![Air Canada logo]()
$932
This Air Canada deal was found by Cheapflights users on 3/13. 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.
Tue 4/284:05 pm
STL
- MEL
3 stops52h 20m
Multiple Airlines
Tue 5/56:00 am
MEL
- STL
3 stops45h 06m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$1,150
This Air Canada deal was found by Cheapflights users on 3/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:40 pm
STL
- BNE
2 stops25h 25m
Multiple Airlines
Wed 5/610:00 am
BNE
- STL
2 stops25h 25m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$926
This Air Canada deal was found by Cheapflights users on 3/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/294:05 pm
STL
- BNE
3 stops55h 25m
Air Canada
Wed 5/610:00 am
BNE
- STL
2 stops25h 25m
Air Canada
Deal found 3/15![Air Canada logo]()
$994
This Air Canada deal was found by Cheapflights users on 3/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:40 pm
STL
- SYD
2 stops25h 40m
Multiple Airlines
Wed 5/69:20 am
SYD
- STL
2 stops41h 46m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$1,148
This lastminute.com deal was found by Cheapflights users on 3/14. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:21 am
STL
- SYD
2 stops35h 59m
Qantas Airways
Wed 5/612:00 pm
SYD
- STL
1 stop20h 21m
Qantas Airways
Deal found 3/14![Qantas Airways logo]()
$1,211
This Expedia deal was found by Cheapflights users on 3/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/304:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Thu 5/710:00 am
BNE
- STL
2 stops25h 25m
Air Canada
Deal found 3/16![Air Canada logo]()
$998
This Air Canada deal was found by Cheapflights users on 3/16. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/304:05 pm
STL
- BNE
3 stops53h 00m
Multiple Airlines
Thu 5/710:00 am
BNE
- STL
2 stops25h 25m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$1,026
This Air Canada deal was found by Cheapflights users on 3/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/304:05 pm
STL
- SYD
2 stops48h 15m
Air Canada
Thu 5/79:20 am
SYD
- STL
2 stops41h 46m
Air Canada
Deal found 3/15![Air Canada logo]()
$1,201
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 March 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 March 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/15. 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.
Wed 5/66:51 pm
STL
- SYD
3 stops49h 59m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$525
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:08 pm
STL
- MEL
3 stops48h 52m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$563
This Air Canada deal was found by Cheapflights users on 3/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/61:00 pm
STL
- SYD
2 stops27h 20m
Air Canada
Deal found 3/15![Air Canada logo]()
$616
This Air Canada deal was found by Cheapflights users on 3/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:05 pm
STL
- SYD
2 stops48h 15m
Air Canada
Deal found 3/15![Air Canada logo]()
$621
This Kiwi.com deal was found by Cheapflights users on 3/16. 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.
Thu 9/107:32 pm
STL
- PER
3 stops48h 23m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$661
This Gurufare deal was found by Cheapflights users on 3/13. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/187:05 am
STL
- MEL
2 stops37h 00m
Air New Zealand
Deal found 3/13![Air New Zealand logo]()
$677
This Kiwi.com deal was found by Cheapflights users on 3/15. 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 4/284:59 pm
STL
- SYD
3 stops47h 31m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$704
This Kiwi.com deal was found by Cheapflights users on 3/16. 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.
Thu 9/103:24 pm
STL
- CNS
3 stops57h 31m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$712
This United Airlines deal was found by Cheapflights users on 3/13. 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 5/187:06 pm
STL
- MEL
1 stop22h 09m
United Airlines
Deal found 3/13![United Airlines logo]()
$763
This oojo deal was found by Cheapflights users on 3/15. 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.
Tue 4/286:11 pm
STL
- SYD
1 stop21h 44m
Qantas Airways
Deal found 3/15![Qantas Airways logo]()
$773
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:08 pm
STL
- AVV
3 stops52h 57m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$788
This oojo deal was found by Cheapflights users on 3/15. 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.
Wed 5/66:21 am
STL
- SYD
1 stop33h 44m
Qantas Airways
Deal found 3/15![Qantas Airways logo]()
$790
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 March 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $926 (Air Canada) |
One-way from | $525 (Kiwi.com) |
Popular in | December |
Cheapest in | March |
Average price | $1,254 |
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 March 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. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Mon 4/27
4:05 pm-7:05 am
2 stops48h 00m
Brisbane
Mon 5/4
8:45 pm-8:04 pm
3 stops38h 19m
$967
St. LouisMelbourne
STL - AVV
STLAVV
Lambert-St Louis
Sat 9/12
2:40 pm-4:05 pm
3 stops34h 25m
Melbourne Avalon
Tue 9/22
8:55 pm-8:00 pm
3 stops38h 05m
$1,150
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Mon 4/27
6:21 am-5:00 am
1 stop31h 39m
Brisbane
Mon 5/4
9:10 am-7:30 pm
2 stops25h 20m
$1,206
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Thu 7/2
8:55 am-7:05 am
2 stops55h 10m
Brisbane
Wed 7/15
10:00 am-2:02 pm
2 stops43h 02m
$1,234
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Fri 4/10
4:05 pm-11:20 am
3 stops52h 15m
Melbourne
Fri 4/17
6:00 am-3:25 pm
3 stops48h 25m
$1,285
St. LouisMelbourne
STL - AVV
STLAVV
Lambert-St Louis
Wed 4/29
4:05 pm-10:50 pm
3 stops63h 45m
Melbourne Avalon
Wed 5/6
8:40 pm-4:57 pm
3 stops35h 17m
$1,302
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Wed 8/12
3:02 pm-7:30 am
2 stops25h 28m
Melbourne
Sun 8/23
10:55 am-6:24 pm
1 stop22h 29m
$1,332
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Thu 4/30
6:00 am-8:15 am
2 stops35h 15m
Melbourne
Thu 5/7
10:55 am-6:22 pm
1 stop22h 27m
$1,336
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Wed 4/29
6:00 am-7:30 am
2 stops34h 30m
Melbourne
Wed 5/6
9:30 am-10:45 pm
2 stops28h 15m
$1,336
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sun 5/31
4:48 pm-7:00 am
2 stops23h 12m
Sydney Kingsford Smith
Tue 6/23
10:20 am-6:17 pm
1 stop22h 57m
$1,339
Showing 1-10 of 46 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-SYD
STL-MEL
STL-PER
STL-CNS
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-SYD
STL-MEL
STL-PER
STL-CNS
What is the cheapest month to book a flight from St. Louis to Australia?
Currently, August is the cheapest month in which you can book a flight from St. Louis to Australia (average of $649). 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 March 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.
Overall
8.1
Boarding
8.2
Comfort
8.1
Crew
8.5
Entertainment
7.5
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.1
Boarding
8.2
Comfort
8.1
Crew
8.5
Entertainment
7.5
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.1
Boarding
8.2
Comfort
8.1
Crew
8.5
Entertainment
7.5
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.1
Boarding
8.2
Comfort
8.1
Crew
8.5
Entertainment
7.5
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.1
Boarding
8.2
Comfort
8.1
Crew
8.5
Entertainment
7.5
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.1
Boarding
8.2
Comfort
8.1
Crew
8.5
Entertainment
7.5
Food
7.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - 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.
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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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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 March 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 March 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$975 | Average$1,307 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,427 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,370 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,132 | Average$1,268 | FlexibilityNo cancel fee | On-time74% |