$547+ 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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Jul 29 — Aug 51
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 June 29, 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 June 29, 2026.
This Bravofly deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:00 am
STL
- SYD
1 stop34h 30m
Qantas Airways
Mon 8/179:10 am
SYD
- STL
1 stop28h 49m
Qantas Airways
Deal found 6/26![Qantas Airways logo]()
$1,149
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:48 pm
STL
- SYD
2 stops23h 12m
United Airlines
Mon 8/1710:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 6/29![United Airlines logo]()
$1,186
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/95:10 am
STL
- SYD
2 stops34h 50m
United Airlines
Sun 8/1610:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,191
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:45 pm
STL
- MEL
2 stops27h 00m
American Airlines
Sat 8/299:45 am
MEL
- STL
1 stop28h 14m
American Airlines
Deal found 6/26![American Airlines logo]()
$1,192
This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/812:45 pm
STL
- MEL
2 stops27h 00m
American Airlines
Sat 8/229:45 am
MEL
- STL
1 stop28h 14m
American Airlines
Deal found 6/24![American Airlines logo]()
$1,194
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:00 am
STL
- SYD
1 stop34h 05m
American Airlines
Mon 8/179:10 am
SYD
- STL
2 stops23h 55m
American Airlines
Deal found 6/26![American Airlines logo]()
$1,195
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:05 pm
STL
- MEL
1 stop22h 25m
United Airlines
Wed 11/1112:45 pm
MEL
- STL
1 stop26h 25m
United Airlines
Deal found 6/29![United Airlines logo]()
$1,199
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:29 pm
STL
- MEL
2 stops27h 46m
United Airlines
Tue 11/312:45 pm
MEL
- STL
2 stops24h 49m
United Airlines
Deal found 6/29![United Airlines logo]()
$1,203
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/219:44 am
STL
- SYD
1 stop30h 11m
American Airlines
Tue 7/285:50 pm
SYD
- STL
1 stop21h 09m
American Airlines
Deal found 6/26![American Airlines logo]()
$1,203
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Sun 8/169:30 am
MEL
- STL
2 stops27h 30m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,204
This American Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:00 am
STL
- SYD
1 stop34h 05m
American Airlines
Sun 8/165:50 pm
SYD
- STL
1 stop20h 09m
American Airlines
Deal found 6/25![American Airlines logo]()
$1,212
This oojo deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:00 am
STL
- SYD
1 stop34h 05m
Qantas Airways
Mon 9/149:10 am
SYD
- STL
1 stop29h 30m
Qantas Airways
Deal found 6/27![Qantas Airways logo]()
$1,221
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 June 29, 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 June 29, 2026.
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:48 pm
STL
- SYD
2 stops23h 12m
United Airlines
Mon 8/1710:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 6/29![United Airlines logo]()
$1,186
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:00 am
STL
- MEL
1 stop33h 45m
American Airlines
Sat 8/299:45 am
MEL
- STL
1 stop28h 14m
American Airlines
Deal found 6/26![American Airlines logo]()
$1,197
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/110:29 am
STL
- SYD
2 stops29h 21m
Delta
Mon 10/1210:15 am
SYD
- STL
2 stops26h 26m
Delta
Deal found 6/29![Delta logo]()
$1,360
This Air Canada deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:40 pm
STL
- AVV
3 stops33h 25m
Multiple Airlines
Tue 11/36:00 am
AVV
- STL
3 stops50h 26m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$1,435
This Air Canada deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1112:10 pm
STL
- BNE
2 stops27h 55m
Air Canada
Tue 8/188:45 pm
BNE
- STL
3 stops56h 17m
Air Canada
Deal found 6/27![Air Canada logo]()
$1,437
This Qatar Airways deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:00 am
STL
- PER
2 stops45h 45m
Qatar Airways
Tue 2/210:45 pm
PER
- STL
2 stops53h 41m
Qatar Airways
Deal found 6/26![Qatar Airways logo]()
$1,597
This oojo deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:00 am
STL
- PER
2 stops41h 25m
Qantas Airways
Thu 8/2011:45 pm
PER
- STL
2 stops36h 14m
Qantas Airways
Deal found 6/29![Qantas Airways logo]()
$1,644
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Wed 8/1910:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 6/28![United Airlines logo]()
$1,186
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/123:13 pm
STL
- MEL
2 stops26h 02m
United Airlines
Wed 8/1910:55 am
MEL
- STL
1 stop22h 44m
United Airlines
Deal found 6/28![United Airlines logo]()
$1,199
This Air Canada deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:05 pm
STL
- AVV
3 stops63h 10m
Multiple Airlines
Wed 11/116:00 am
AVV
- STL
3 stops50h 26m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$1,435
This Air Canada deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/38:55 am
STL
- BNE
3 stops35h 35m
Air Canada
Mon 8/3110:00 am
BNE
- STL
2 stops47h 42m
Air Canada
Deal found 6/28![Air Canada logo]()
$1,437
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:05 pm
STL
- MEL
1 stop22h 25m
United Airlines
Wed 11/1112:45 pm
MEL
- STL
1 stop26h 25m
United Airlines
Deal found 6/28![United Airlines logo]()
$1,199
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:29 pm
STL
- MEL
2 stops27h 46m
United Airlines
Tue 11/312:45 pm
MEL
- STL
2 stops24h 49m
United Airlines
Deal found 6/27![United Airlines logo]()
$1,203
This Air Canada deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/282:40 pm
STL
- BNE
3 stops29h 50m
Multiple Airlines
Tue 8/45:55 pm
BNE
- STL
3 stops41h 29m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$1,460
This United Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/77:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Fri 8/1410:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 6/24![United Airlines logo]()
$1,287
This Air Canada deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 42m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$1,563
This United Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Mon 9/1410:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 6/26![United Airlines logo]()
$1,306
This United deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/37:23 pm
STL
- PER
2 stops38h 47m
Multiple Airlines
Mon 8/243:30 pm
PER
- STL
3 stops61h 08m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$1,595
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:40 pm
STL
- SYD
2 stops23h 20m
United Airlines
Wed 10/711:20 am
SYD
- STL
1 stop23h 23m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,306
This Air Canada deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/34:05 pm
STL
- PER
3 stops55h 45m
Multiple Airlines
Tue 2/23:15 pm
PER
- STL
3 stops62h 11m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$1,697
This United Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1311:35 am
STL
- SYD
2 stops28h 25m
United Airlines
Wed 11/189:15 am
SYD
- STL
1 stop21h 58m
United Airlines
Deal found 6/26![United Airlines logo]()
$1,310
This Air New Zealand deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/241:36 pm
STL
- BNE
3 stops30h 29m
Multiple Airlines
Wed 9/912:20 pm
BNE
- STL
3 stops26h 20m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$1,728
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/11:36 pm
STL
- SYD
2 stops26h 24m
United Airlines
Mon 10/1211:20 am
SYD
- STL
1 stop23h 23m
United Airlines
Deal found 6/29![United Airlines logo]()
$1,360
This United Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:53 am
STL
- SYD
2 stops29h 02m
United Airlines
Wed 9/1610:20 am
SYD
- STL
2 stops21h 14m
United Airlines
Deal found 6/26![United Airlines logo]()
$1,360
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:32 pm
STL
- BNE
2 stops23h 58m
United Airlines
Fri 9/410:30 am
BNE
- STL
1 stop23h 09m
United Airlines
Deal found 6/29![United Airlines logo]()
$1,598
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/241:36 pm
STL
- BNE
2 stops25h 54m
United Airlines
Wed 9/910:30 am
BNE
- STL
1 stop23h 09m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,605
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/268:42 am
STL
- BNE
1 stop30h 48m
United Airlines
Mon 9/76:55 am
BNE
- STL
2 stops26h 44m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,634
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/241:36 pm
STL
- BNE
2 stops25h 54m
United Airlines
Mon 9/76:55 am
BNE
- STL
3 stops47h 43m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,644
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:42 am
STL
- PER
2 stops38h 48m
United Airlines
Wed 8/193:30 pm
PER
- STL
3 stops61h 08m
United Airlines
Deal found 6/28![United Airlines logo]()
$1,655
This United Airlines deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:59 pm
STL
- PER
3 stops51h 41m
United Airlines
Thu 8/2011:45 pm
PER
- STL
2 stops31h 54m
United Airlines
Deal found 6/29![United Airlines logo]()
$1,690
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated June 29, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated June 29, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:33 pm
STL
- BNE
2 stops46h 32m
Air Canada
Sun 7/510:00 am
BNE
- STL
2 stops28h 57m
Air Canada
Deal found 6/25![Air Canada logo]()
$1,424
This BusinessClass deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/279:04 am
STL
- BNE
3 stops47h 21m
Qantas Airways
Sun 7/57:40 am
BNE
- STL
2 stops31h 19m
Qantas Airways
Deal found 6/26![Qantas Airways logo]()
$1,888
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Fri 7/3110:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,236
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/11:13 pm
STL
- SYD
2 stops26h 42m
United Airlines
Sat 7/119:30 am
SYD
- STL
2 stops24h 53m
United Airlines
Deal found 6/27![United Airlines logo]()
$1,240
This oojo deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/25:13 pm
STL
- SYD
1 stop22h 42m
Qantas Airways
Thu 7/95:50 pm
SYD
- STL
1 stop21h 09m
Qantas Airways
Deal found 6/27![Qantas Airways logo]()
$1,255
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/24:48 pm
STL
- SYD
2 stops23h 12m
United Airlines
Thu 7/910:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 6/25![United Airlines logo]()
$1,286
This United Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:25 am
STL
- SYD
2 stops28h 35m
United Airlines
Sat 8/229:30 am
SYD
- STL
2 stops22h 04m
United Airlines
Deal found 6/24![United Airlines logo]()
$1,292
This oojo deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/56:37 am
STL
- SYD
1 stop33h 28m
Qantas Airways
Sun 9/612:00 pm
SYD
- STL
1 stop21h 05m
Qantas Airways
Deal found 6/24![Qantas Airways logo]()
$1,232
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/219:44 am
STL
- SYD
1 stop30h 11m
American Airlines
Tue 7/285:50 pm
SYD
- STL
1 stop21h 09m
American Airlines
Deal found 6/26![American Airlines logo]()
$1,203
This Air Canada deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2812:10 pm
STL
- BNE
2 stops27h 55m
Air Canada
Tue 8/410:15 am
BNE
- STL
2 stops47h 27m
Air Canada
Deal found 6/28![Air Canada logo]()
$1,398
This Air Canada deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/284:48 pm
STL
- BNE
2 stops23h 17m
Multiple Airlines
Tue 8/45:55 pm
BNE
- STL
3 stops41h 29m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$1,429
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/287:23 pm
STL
- BNE
2 stops46h 37m
United Airlines
Tue 8/410:30 am
BNE
- STL
1 stop22h 47m
United Airlines
Deal found 6/28![United Airlines logo]()
$1,771
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 June 29, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated June 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/94:09 pm
STL
- SYD
3 stops52h 41m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$547
This Kiwi.com deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/258:10 pm
STL
- MEL
3 stops48h 55m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$548
This Kiwi.com deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:45 pm
STL
- SYD
3 stops50h 05m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$603
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/92:10 pm
STL
- SYD
2 stops25h 40m
Delta
Deal found 6/28![Delta logo]()
$625
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:27 am
STL
- MEL
2 stops30h 48m
United Airlines
Deal found 6/27![United Airlines logo]()
$630
This Bravofly deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:00 am
STL
- SYD
1 stop34h 05m
Qantas Airways
Deal found 6/28![Qantas Airways logo]()
$633
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/96:00 am
STL
- SYD
1 stop34h 05m
American Airlines
Deal found 6/26![American Airlines logo]()
$635
This United Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/23:13 pm
STL
- SYD
2 stops24h 47m
United Airlines
Deal found 6/26![United Airlines logo]()
$697
This oojo deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1412:43 pm
STL
- MEL
1 stop24h 17m
Qantas Airways
Deal found 6/27![Qantas Airways logo]()
$734
This United Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:08 am
STL
- MEL
1 stop34h 07m
United Airlines
Deal found 6/24![United Airlines logo]()
$844
This Air Canada deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/912:10 pm
STL
- SYD
3 stops52h 10m
Air Canada
Deal found 6/26![Air Canada logo]()
$862
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Deal found 6/28![United Airlines logo]()
$1,148
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 June 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,149 (Bravofly) |
One-way from | $547 (Kiwi.com) |
Popular in | June |
Cheapest in | March |
Average price | $1,706 |
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 June 29, 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 8/10
4:48 pm-7:00 am
2 stops23h 12m
Sydney Kingsford Smith
Mon 8/17
10:20 am-6:39 pm
1 stop23h 19m
$1,186
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 8/12
8:42 am-6:55 am
1 stop31h 13m
Sydney Kingsford Smith
Wed 8/19
10:20 am-6:39 pm
1 stop23h 19m
$1,186
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sat 8/15
6:00 am-6:45 am
1 stop33h 45m
Melbourne
Sat 8/29
9:45 am-10:59 pm
1 stop28h 14m
$1,197
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Wed 8/12
3:13 pm-8:15 am
2 stops26h 02m
Melbourne
Wed 8/19
10:55 am-6:39 pm
1 stop22h 44m
$1,199
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/27
7:05 pm-9:30 am
1 stop22h 25m
Melbourne
Wed 11/11
12:45 pm-10:10 pm
1 stop26h 25m
$1,199
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/20
1:29 pm-9:15 am
2 stops27h 46m
Melbourne
Tue 11/3
12:45 pm-8:34 pm
2 stops24h 49m
$1,203
Quickest round-trip
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Fri 8/7
7:23 pm-6:55 am
1 stop20h 32m
Sydney Kingsford Smith
Fri 8/14
10:20 am-6:39 pm
1 stop23h 19m
$1,287
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 9/7
8:42 am-6:55 am
1 stop31h 13m
Sydney Kingsford Smith
Mon 9/14
10:20 am-6:39 pm
1 stop23h 19m
$1,306
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 9/23
4:40 pm-7:00 am
2 stops23h 20m
Sydney Kingsford Smith
Wed 10/7
11:20 am-6:43 pm
1 stop23h 23m
$1,306
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Tue 10/13
11:35 am-8:00 am
2 stops28h 25m
Sydney Kingsford Smith
Wed 11/18
9:15 am-2:13 pm
1 stop21h 58m
$1,310
Showing 1-10 of 47 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-AVV
STL-BNE
STL-PER
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-AVV
STL-BNE
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 June 29, 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
Overall
8.1
Entertainment
7.5
Food
7.5
Boarding
8.2
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Overall
8.1
Entertainment
7.5
Food
7.5
Boarding
8.2
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Overall
8.1
Entertainment
7.5
Food
7.5
Boarding
8.2
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Overall
8.1
Entertainment
7.5
Food
7.5
Boarding
8.2
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Overall
8.1
Entertainment
7.5
Food
7.5
Boarding
8.2
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Overall
8.1
Entertainment
7.5
Food
7.5
Boarding
8.2
Crew
8.6
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.
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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 June 29, 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 June 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$998 | Average$1,334 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,402 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,343 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,265 | Average$1,314 | FlexibilityNo cancel fee | On-time74% |