$554+ 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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
May 18 — May 251
Round-trip
1 adult, Economy
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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 April 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 April 18, 2026.
This Air Canada deal was found by Cheapflights users on 4/13. 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 5/122:15 pm
STL
- MEL
3 stops30h 05m
Multiple Airlines
Tue 5/196:00 am
MEL
- STL
3 stops45h 06m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$1,249
This Jetabroad deal was found by Cheapflights users on 4/16. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:54 pm
STL
- MEL
2 stops33h 26m
Multiple Airlines
Sat 8/157:30 am
MEL
- STL
2 stops27h 56m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$1,272
This United Airlines deal was found by Cheapflights users on 4/16. 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 8/67:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Sat 8/1510:55 am
MEL
- STL
1 stop22h 29m
United Airlines
Deal found 4/16![United Airlines logo]()
$1,277
This United Airlines deal was found by Cheapflights users on 4/17. 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.
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 4/17![United Airlines logo]()
$1,304
This Delta deal was found by Cheapflights users on 4/16. 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 5/410:50 am
STL
- SYD
2 stops29h 00m
Delta
Mon 5/189:15 am
SYD
- STL
2 stops26h 54m
Delta
Deal found 4/16![Delta logo]()
$1,307
This Justfly.com deal was found by Cheapflights users on 4/13. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2912:10 pm
STL
- BNE
2 stops27h 55m
Air Canada
Mon 8/1010:00 am
BNE
- STL
2 stops49h 39m
Air Canada
Deal found 4/13![Air Canada logo]()
$1,318
This oojo deal was found by Cheapflights users on 4/16. 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 5/46:11 pm
STL
- SYD
1 stop21h 44m
Qantas Airways
Mon 5/185:50 pm
SYD
- STL
1 stop21h 09m
Qantas Airways
Deal found 4/16![Qantas Airways logo]()
$1,363
This oojo deal was found by Cheapflights users on 4/14. 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.
Tue 10/135:11 pm
STL
- SYD
1 stop21h 44m
Qantas Airways
Wed 11/182:05 pm
SYD
- STL
1 stop19h 35m
Qantas Airways
Deal found 4/14![Qantas Airways logo]()
$1,382
This oojo deal was found by Cheapflights users on 4/16. 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 9/73:35 pm
STL
- SYD
1 stop24h 20m
Qantas Airways
Mon 9/1412:00 pm
SYD
- STL
1 stop21h 14m
Qantas Airways
Deal found 4/16![Qantas Airways logo]()
$1,383
This oojo deal was found by Cheapflights users on 4/17. 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.
Sun 8/233:35 pm
STL
- SYD
1 stop24h 20m
Qantas Airways
Tue 9/15:50 pm
SYD
- STL
1 stop20h 05m
Qantas Airways
Deal found 4/17![Qantas Airways logo]()
$1,384
This oojo deal was found by Cheapflights users on 4/13. 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 6/226:35 am
STL
- SYD
2 stops35h 45m
Qantas Airways
Wed 7/812:00 pm
SYD
- STL
1 stop19h 33m
Qantas Airways
Deal found 4/13![Qantas Airways logo]()
$1,388
This oojo deal was found by Cheapflights users on 4/16. 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.
Wed 7/15:18 pm
STL
- BNE
2 stops28h 17m
Qantas Airways
Sat 7/119:10 am
BNE
- STL
2 stops24h 24m
Qantas Airways
Deal found 4/16![Qantas Airways logo]()
$1,394
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 April 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 April 18, 2026.
This Delta deal was found by Cheapflights users on 4/16. 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 5/410:50 am
STL
- SYD
2 stops29h 00m
Delta
Mon 5/189:15 am
SYD
- STL
2 stops26h 54m
Delta
Deal found 4/16![Delta logo]()
$1,307
This United Airlines deal was found by Cheapflights users on 4/18. 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.
Mon 5/41:24 pm
STL
- SYD
2 stops26h 36m
United Airlines
Mon 5/189:30 am
SYD
- STL
2 stops22h 09m
United Airlines
Deal found 4/18![United Airlines logo]()
$1,309
This CheapOair deal was found by Cheapflights users on 4/13. 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.
Wed 9/233:12 pm
STL
- SYD
2 stops25h 18m
Alaska Airlines
Wed 10/76:50 pm
SYD
- STL
2 stops35h 36m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$1,424
This oojo deal was found by Cheapflights users on 4/17. 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 9/145:11 pm
STL
- MEL
1 stop20h 49m
Qantas Airways
Tue 9/229:45 am
MEL
- STL
1 stop28h 17m
Qantas Airways
Deal found 4/17![Qantas Airways logo]()
$1,464
This oojo deal was found by Cheapflights users on 4/15. 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 8/186:02 am
STL
- PER
2 stops47h 33m
Qatar Airways
Mon 9/2110:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 4/15![Qatar Airways logo]()
$1,481
This Air Canada deal was found by Cheapflights users on 4/13. 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.
Wed 9/2312:10 pm
STL
- SYD
2 stops28h 10m
Air Canada
Wed 10/710:20 am
SYD
- STL
3 stops48h 21m
Air Canada
Deal found 4/13![Air Canada logo]()
$1,582
This oojo deal was found by Cheapflights users on 4/16. 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.
Thu 8/66:54 pm
STL
- AVV
2 stops36h 56m
Multiple Airlines
Sat 8/154:40 pm
AVV
- STL
2 stops45h 15m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$1,592
This oojo deal was found by Cheapflights users on 4/13. 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.
Wed 9/238:35 am
STL
- SYD
2 stops33h 10m
Air New Zealand
Wed 10/711:20 am
SYD
- STL
1 stop22h 33m
Air New Zealand
Deal found 4/13![Air New Zealand logo]()
$1,595
This United Airlines deal was found by Cheapflights users on 4/14. 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.
Fri 5/297:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Fri 6/59:30 am
MEL
- STL
2 stops24h 53m
United Airlines
Deal found 4/14![United Airlines logo]()
$1,485
This Qantas Airways deal was found by Cheapflights users on 4/13. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/15:18 pm
STL
- BNE
2 stops39h 07m
Qantas Airways
Sat 7/116:55 am
BNE
- STL
2 stops26h 39m
Qantas Airways
Deal found 4/13![Qantas Airways logo]()
$1,515
This United Airlines deal was found by Cheapflights users on 4/16. 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.
Sun 5/317:23 pm
STL
- MEL
2 stops35h 42m
United Airlines
Sun 6/710:55 am
MEL
- STL
2 stops26h 49m
United Airlines
Deal found 4/16![United Airlines logo]()
$1,515
This Qantas Airways deal was found by Cheapflights users on 4/13. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/136:11 pm
STL
- CNS
2 stops27h 44m
Multiple Airlines
Wed 5/206:00 am
CNS
- STL
3 stops31h 59m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$1,694
This oojo deal was found by Cheapflights users on 4/17. 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 10/126:30 am
STL
- HBA
2 stops47h 20m
Qantas Airways
Mon 10/196:00 am
HBA
- STL
2 stops33h 05m
Qantas Airways
Deal found 4/17![Qantas Airways logo]()
$1,613
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/145:42 pm
STL
- MEL
2 stops47h 08m
Delta
Wed 8/510:00 am
MEL
- STL
2 stops23h 59m
Delta
Deal found 4/14![Delta logo]()
$1,819
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Mon 10/127:00 am
STL
- HBA
2 stops37h 10m
United Airlines
Mon 10/196:05 am
HBA
- STL
3 stops49h 33m
United Airlines
Deal found 4/17![United Airlines logo]()
$1,576
This Air New Zealand deal was found by Cheapflights users on 4/15. 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.
Mon 9/143:02 pm
STL
- MEL
2 stops28h 53m
Multiple Airlines
Tue 9/2212:10 pm
MEL
- STL
3 stops26h 40m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$1,735
This oojo deal was found by Cheapflights users on 4/13. 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 7/111:14 pm
STL
- CBR
2 stops29h 01m
Qantas Airways
Mon 7/2010:00 am
CBR
- STL
2 stops23h 35m
Qantas Airways
Deal found 4/13![Qantas Airways logo]()
$1,684
This Qatar Airways deal was found by Cheapflights users on 4/13. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1311:06 am
STL
- CNS
3 stops55h 44m
Qatar Airways
Wed 5/201:40 pm
CNS
- STL
3 stops49h 19m
Qatar Airways
Deal found 4/13![Qatar Airways logo]()
$2,100
This United Airlines deal was found by Cheapflights users on 4/13. 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.
Fri 5/297:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Fri 6/510:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 4/13![United Airlines logo]()
$1,588
This Air New Zealand deal was found by Cheapflights users on 4/15. 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 9/93:02 pm
STL
- SYD
2 stops28h 38m
Multiple Airlines
Fri 9/1811:55 am
SYD
- STL
3 stops26h 55m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$1,792
This United Airlines deal was found by Cheapflights users on 4/18. 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.
Sun 9/271:27 pm
STL
- MEL
2 stops27h 48m
United Airlines
Sat 10/1011:55 am
MEL
- STL
2 stops23h 30m
United Airlines
Deal found 4/18![United Airlines logo]()
$1,594
This Qantas Airways deal was found by Cheapflights users on 4/14. 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 8/155:11 pm
STL
- HBA
2 stops28h 59m
Qantas Airways
Wed 8/194:55 pm
HBA
- STL
2 stops45h 00m
Qantas Airways
Deal found 4/14![Qantas Airways logo]()
$1,787
This Air New Zealand deal was found by Cheapflights users on 4/17. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/131:36 pm
STL
- SYD
3 stops27h 09m
Multiple Airlines
Fri 11/1311:45 am
SYD
- STL
2 stops23h 53m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$1,794
This Qatar Airways deal was found by Cheapflights users on 4/15. 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.
Mon 5/411:06 am
STL
- CNS
3 stops64h 19m
Qatar Airways
Sun 8/94:55 pm
CNS
- STL
3 stops41h 19m
Qatar Airways
Deal found 4/15![Qatar Airways logo]()
$2,309
This United Airlines deal was found by Cheapflights users on 4/16. 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.
Wed 7/297:23 pm
STL
- BNE
2 stops25h 57m
United Airlines
Mon 8/106:55 am
BNE
- STL
3 stops47h 43m
United Airlines
Deal found 4/16![United Airlines logo]()
$1,629
This Qantas Airways deal was found by Cheapflights users on 4/15. 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 5/305:11 pm
STL
- HBA
2 stops24h 14m
Multiple Airlines
Sat 6/66:00 am
HBA
- STL
3 stops27h 30m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$1,813
This Qantas Airways deal was found by Cheapflights users on 4/14. 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 8/85:11 pm
STL
- CNS
2 stops38h 29m
Qantas Airways
Wed 8/126:50 am
CNS
- STL
2 stops55h 05m
Qantas Airways
Deal found 4/14![Qantas Airways logo]()
$1,839
This United Airlines deal was found by Cheapflights users on 4/16. 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 6/256:01 am
STL
- BNE
3 stops40h 19m
United Airlines
Sun 7/510:30 am
BNE
- STL
2 stops44h 16m
United Airlines
Deal found 4/16![United Airlines logo]()
$1,629
This oojo deal was found by Cheapflights users on 4/13. 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 9/146:51 pm
STL
- AVV
2 stops36h 59m
Multiple Airlines
Tue 9/2210:30 am
AVV
- STL
2 stops27h 32m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$1,825
This oojo deal was found by Cheapflights users on 4/17. 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.
Fri 7/36:36 am
STL
- PER
2 stops40h 29m
Qantas Airways
Fri 7/175:55 pm
PER
- STL
2 stops37h 39m
Qantas Airways
Deal found 4/17![Qantas Airways logo]()
$1,845
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated April 18, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated April 18, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 4/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/199:34 am
STL
- SYD
1 stop30h 21m
American Airlines
Sat 4/2512:00 pm
SYD
- STL
1 stop20h 21m
American Airlines
Deal found 4/15![American Airlines logo]()
$1,463
This United Airlines deal was found by Cheapflights users on 4/17. 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.
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 4/17![United Airlines logo]()
$1,304
This Delta deal was found by Cheapflights users on 4/16. 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 5/410:50 am
STL
- SYD
2 stops29h 00m
Delta
Mon 5/189:15 am
SYD
- STL
2 stops26h 54m
Delta
Deal found 4/16![Delta logo]()
$1,307
This oojo deal was found by Cheapflights users on 4/16. 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 5/46:11 pm
STL
- SYD
1 stop21h 44m
Qantas Airways
Mon 5/185:50 pm
SYD
- STL
1 stop21h 09m
Qantas Airways
Deal found 4/16![Qantas Airways logo]()
$1,363
This oojo deal was found by Cheapflights users on 4/15. 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 5/46:11 pm
STL
- SYD
1 stop21h 44m
Qantas Airways
Mon 5/1112:00 pm
SYD
- STL
1 stop22h 30m
Qantas Airways
Deal found 4/15![Qantas Airways logo]()
$1,394
This American Airlines deal was found by Cheapflights users on 4/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:37 pm
STL
- SYD
2 stops25h 28m
American Airlines
Mon 5/1812:00 pm
SYD
- STL
1 stop20h 21m
American Airlines
Deal found 4/15![American Airlines logo]()
$1,417
This oojo deal was found by Cheapflights users on 4/14. 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.
Thu 5/76:11 pm
STL
- SYD
1 stop21h 44m
Qantas Airways
Wed 5/1312:00 pm
SYD
- STL
1 stop20h 21m
Qantas Airways
Deal found 4/14![Qantas Airways logo]()
$1,413
This Air Canada deal was found by Cheapflights users on 4/13. 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 5/122:15 pm
STL
- MEL
3 stops30h 05m
Multiple Airlines
Tue 5/196:00 am
MEL
- STL
3 stops45h 06m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$1,249
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:21 am
STL
- SYD
2 stops35h 59m
Qantas Airways
Tue 5/1912:00 pm
SYD
- STL
1 stop20h 21m
Qantas Airways
Deal found 4/14![Qantas Airways logo]()
$1,411
This oojo deal was found by Cheapflights users on 4/13. 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.
Tue 5/126:21 am
STL
- MEL
1 stop33h 24m
Qantas Airways
Tue 5/199:45 am
MEL
- STL
1 stop29h 14m
Qantas Airways
Deal found 4/13![Qantas Airways logo]()
$1,474
This United Airlines deal was found by Cheapflights users on 4/14. 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.
Fri 5/292:57 pm
STL
- MEL
2 stops25h 33m
United Airlines
Fri 6/59:30 am
MEL
- STL
2 stops29h 27m
United Airlines
Deal found 4/14![United Airlines logo]()
$1,485
This oojo deal was found by Cheapflights users on 4/15. 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.
Sat 5/305:11 pm
STL
- BNE
2 stops25h 09m
Qantas Airways
Sat 6/68:00 am
BNE
- STL
2 stops25h 30m
Qantas Airways
Deal found 4/15![Qantas Airways logo]()
$1,422
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 April 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 April 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/264:19 pm
STL
- SYD
3 stops52h 31m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$554
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/274:19 pm
STL
- SYD
3 stops52h 31m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$561
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Sat 5/161:24 pm
STL
- MEL
2 stops27h 51m
United Airlines
Deal found 4/17![United Airlines logo]()
$711
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Wed 8/128:08 pm
STL
- PER
3 stops46h 07m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$722
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/143:33 pm
STL
- PER
3 stops58h 22m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$723
This Kiwi.com deal was found by Cheapflights users on 4/16. 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.
Sun 5/314:19 pm
STL
- SYD
2 stops48h 11m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$737
This KAYAK deal was found by Cheapflights users on 4/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/317:23 pm
STL
- SYD
1 stop20h 32m
Air New Zealand
Deal found 4/16![Air New Zealand logo]()
$768
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:00 am
STL
- SYD
2 stops33h 50m
Delta
Deal found 4/14![Delta logo]()
$769
This FlightHub deal was found by Cheapflights users on 4/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:05 am
STL
- MEL
3 stops37h 30m
Air Canada
Deal found 4/14![Air Canada logo]()
$781
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:51 pm
STL
- PER
3 stops58h 39m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$795
This oojo deal was found by Cheapflights users on 4/14. 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.
Wed 5/275:18 pm
STL
- SYD
1 stop22h 37m
Qantas Airways
Deal found 4/14![Qantas Airways logo]()
$830
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/159:18 pm
STL
- PER
3 stops51h 47m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$837
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 April 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,249 (Air Canada) |
One-way from | $554 (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 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 April 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. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
10:50 am-6:50 am
2 stops29h 00m
Sydney Kingsford Smith
Mon 5/18
9:15 am-9:09 pm
2 stops26h 54m
$1,307
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
1:24 pm-7:00 am
2 stops26h 36m
Sydney Kingsford Smith
Mon 5/18
9:30 am-4:39 pm
2 stops22h 09m
$1,309
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 9/23
3:12 pm-7:30 am
2 stops25h 18m
Sydney Kingsford Smith
Wed 10/7
6:50 pm-2:26 pm
2 stops35h 36m
$1,424
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Mon 9/14
5:11 pm-5:00 am
1 stop20h 49m
Melbourne
Tue 9/22
9:45 am-11:02 pm
1 stop28h 17m
$1,464
St. LouisPerth
STL - PER
STLPER
Lambert-St Louis
Tue 8/18
6:02 am-6:35 pm
2 stops47h 33m
Perth
Mon 9/21
10:45 pm-11:59 pm
2 stops38h 14m
$1,481
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Fri 5/29
7:23 pm-8:15 am
1 stop21h 52m
Melbourne
Fri 6/5
9:30 am-7:23 pm
2 stops24h 53m
$1,485
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Wed 7/1
5:18 pm-11:25 pm
2 stops39h 07m
Brisbane
Sat 7/11
6:55 am-6:34 pm
2 stops26h 39m
$1,515
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sun 5/31
7:23 pm-10:05 pm
2 stops35h 42m
Melbourne
Sun 6/7
10:55 am-10:44 pm
2 stops26h 49m
$1,515
St. LouisHobart
STL - HBA
STLHBA
Lambert-St Louis
Mon 10/12
7:00 am-12:10 pm
2 stops37h 10m
Hobart
Mon 10/19
6:05 am-3:38 pm
3 stops49h 33m
$1,576
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 9/23
12:10 pm-7:20 am
2 stops28h 10m
Sydney Kingsford Smith
Wed 10/7
10:20 am-6:41 pm
3 stops48h 21m
$1,582
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-SYD
STL-MEL
STL-PER
STL-AVV
STL-BNE
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-AVV
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 April 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.
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Boarding
8.2
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.6
Comfort
8.1
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.
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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 April 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 April 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$887 | Average$1,268 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$975 | Average$1,307 | 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% |