$586+ Cheap flights from St. Louis (STL) to Australia
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Jun 23 — Jun 301
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 May 24, 2026.
Explore the most affordable flight options available from St. Louis to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 24, 2026.
This Expedia deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” 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.
Mon 6/86:35 am
STL
- MEL
1 stop33h 10m
Qantas Airways
Fri 7/319:45 am
MEL
- STL
1 stop29h 14m
Qantas Airways
Deal found 5/20![Qantas Airways logo]()
$1,030
This American Airlines deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” 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 7/47:00 am
STL
- MEL
1 stop31h 00m
American Airlines
Sat 7/111:35 pm
MEL
- STL
1 stop23h 14m
American Airlines
Deal found 5/20![American Airlines logo]()
$1,081
This American Airlines deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” 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 10/273:33 pm
STL
- MEL
2 stops25h 57m
American Airlines
Wed 11/1111:15 pm
MEL
- STL
2 stops26h 43m
American Airlines
Deal found 5/23![American Airlines logo]()
$1,085
This American Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 8/93:35 pm
STL
- MEL
2 stops24h 10m
American Airlines
Mon 8/179:45 am
MEL
- STL
2 stops25h 41m
American Airlines
Deal found 5/19![American Airlines logo]()
$1,086
This American Airlines deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:30 am
STL
- MEL
1 stop35h 00m
American Airlines
Sun 11/812:00 pm
MEL
- STL
1 stop27h 29m
American Airlines
Deal found 5/22![American Airlines logo]()
$1,089
This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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
Sun 8/1610:55 am
MEL
- STL
1 stop22h 44m
United Airlines
Deal found 5/19![United Airlines logo]()
$1,092
This American Airlines deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:30 am
STL
- MEL
1 stop35h 00m
American Airlines
Mon 11/911:15 pm
MEL
- STL
2 stops25h 55m
American Airlines
Deal found 5/22![American Airlines logo]()
$1,094
This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 8/64:48 pm
STL
- MEL
2 stops24h 27m
United Airlines
Thu 8/2010:55 am
MEL
- STL
2 stops24h 43m
United Airlines
Deal found 5/19![United Airlines logo]()
$1,097
This American Airlines deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/35:14 am
STL
- MEL
1 stop30h 46m
American Airlines
Thu 12/106:00 am
MEL
- STL
2 stops23h 32m
American Airlines
Deal found 5/21![American Airlines logo]()
$1,110
This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 8/66:01 am
STL
- MEL
2 stops35h 14m
United Airlines
Sat 8/157:00 am
MEL
- STL
2 stops26h 39m
United Airlines
Deal found 5/19![United Airlines logo]()
$1,113
This Air Canada deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 6/31:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Tue 6/99:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 5/19![Air Canada logo]()
$1,190
This Air Canada deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/21:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Fri 6/59:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 5/19![Air Canada logo]()
$1,228
Best flights from St. Louis to AustraliaDiscover carefully curated flight deals from St. Louis to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 24, 2026.
Discover carefully curated flight deals from St. Louis to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 24, 2026.
This American Airlines deal was found by Cheapflights users on 5/24. 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.
Tue 10/273:33 pm
STL
- MEL
2 stops25h 57m
American Airlines
Wed 11/1111:15 pm
MEL
- STL
2 stops26h 43m
American Airlines
Deal found 5/24![American Airlines logo]()
$1,086
This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 8/66:01 am
STL
- MEL
2 stops35h 14m
United Airlines
Thu 8/2010:55 am
MEL
- STL
1 stop22h 44m
United Airlines
Deal found 5/19![United Airlines logo]()
$1,092
This Qantas Airways deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:11 pm
STL
- SYD
2 stops23h 49m
Qantas Airways
Wed 10/711:05 am
SYD
- STL
2 stops23h 09m
Qantas Airways
Deal found 5/23![Qantas Airways logo]()
$1,293
This KAYAK deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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.
Fri 7/36:37 am
STL
- AVV
2 stops40h 43m
Multiple Airlines
Wed 8/510:30 am
AVV
- STL
2 stops27h 25m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$1,376
This Delta deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” 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 8/313:50 pm
STL
- MEL
2 stops25h 00m
Delta
Fri 9/410:00 am
MEL
- STL
2 stops29h 41m
Delta
Deal found 5/23![Delta logo]()
$1,537
This oojo deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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 10/69:35 am
STL
- PER
2 stops44h 00m
Qatar Airways
Mon 10/1210:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 5/22![Qatar Airways logo]()
$1,686
This Justfly.com deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 10/76:51 pm
STL
- PER
2 stops38h 49m
Cathay Pacific
Sun 10/1112:10 am
PER
- STL
2 stops34h 50m
Cathay Pacific
Deal found 5/19![Cathay Pacific logo]()
$2,032
This oojo deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” 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 10/273:33 pm
STL
- BNE
1 stop23h 57m
Qantas Airways
Wed 11/119:15 am
BNE
- STL
1 stop19h 22m
Qantas Airways
Deal found 5/23![Qantas Airways logo]()
$1,303
This United Airlines deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/107:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Wed 6/1710:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/23![United Airlines logo]()
$1,331
This Air Canada deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 8/92:40 pm
STL
- AVV
3 stops32h 30m
Multiple Airlines
Mon 8/178:55 pm
AVV
- STL
3 stops56h 07m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$1,391
This oojo deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” 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 8/35:13 pm
STL
- BNE
2 stops26h 07m
Qantas Airways
Mon 8/319:10 am
BNE
- STL
2 stops24h 00m
Qantas Airways
Deal found 5/23![Qantas Airways logo]()
$1,322
This United Airlines deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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 7/111:25 am
STL
- SYD
2 stops28h 35m
United Airlines
Sun 7/1910:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/22![United Airlines logo]()
$1,336
This Air Canada deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 8/92:40 pm
STL
- MEL
3 stops29h 40m
Multiple Airlines
Mon 8/178:50 pm
MEL
- STL
3 stops38h 17m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$1,405
This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 07m
United Airlines
Wed 7/2910:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/19![United Airlines logo]()
$1,382
This Air Canada deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/264:30 pm
STL
- BNE
2 stops24h 15m
Multiple Airlines
Wed 11/116:10 am
BNE
- STL
3 stops49h 20m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$1,437
This United Airlines deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 8/228:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Tue 9/89:30 am
SYD
- STL
2 stops22h 04m
United Airlines
Deal found 5/21![United Airlines logo]()
$1,386
This Air Canada deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” 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 10/254:15 pm
STL
- AVV
3 stops60h 05m
Multiple Airlines
Wed 11/116:00 am
AVV
- STL
3 stops50h 30m
Multiple Airlines
Deal found 5/23![Multiple Airlines logo]()
$1,439
This Qatar Airways deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 9/196:00 am
STL
- PER
2 stops47h 35m
Qatar Airways
Tue 9/2210:45 pm
PER
- STL
2 stops37h 35m
Qatar Airways
Deal found 5/21![Qatar Airways logo]()
$2,045
This Qantas Airways deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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.
Mon 10/53:33 pm
STL
- PER
2 stops40h 37m
Qantas Airways
Tue 10/1311:45 pm
PER
- STL
2 stops31h 29m
Qantas Airways
Deal found 5/19![Qantas Airways logo]()
$1,737
This Air Canada deal was found by Cheapflights users on 5/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:15 pm
STL
- AVV
3 stops63h 00m
Multiple Airlines
Wed 11/116:00 am
AVV
- STL
3 stops50h 30m
Multiple Airlines
Deal found 5/24![Multiple Airlines logo]()
$1,439
This United Airlines deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” 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 5/23![United Airlines logo]()
$1,459
This Air Canada deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/264:15 pm
STL
- AVV
3 stops63h 00m
Multiple Airlines
Mon 11/98:55 pm
AVV
- STL
3 stops59h 35m
Multiple Airlines
Deal found 5/22![Multiple Airlines logo]()
$1,440
This Ovago deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/73:35 pm
STL
- CBR
3 stops27h 45m
Qantas Airways
Wed 9/2310:05 am
CBR
- STL
2 stops23h 09m
Qantas Airways
Deal found 5/22![Qantas Airways logo]()
$1,810
This United Airlines deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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
- CBR
2 stops37h 33m
United Airlines
Wed 9/238:10 am
CBR
- STL
2 stops25h 29m
United Airlines
Deal found 5/22![United Airlines logo]()
$1,580
This Air Canada deal was found by Cheapflights users on 5/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:15 pm
STL
- MEL
3 stops51h 25m
Multiple Airlines
Wed 11/117:25 am
MEL
- STL
3 stops49h 05m
Multiple Airlines
Deal found 5/24![Multiple Airlines logo]()
$1,470
This Bravofly deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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 7/66:37 am
STL
- HBA
2 stops42h 38m
Qantas Airways
Mon 7/136:00 am
HBA
- STL
2 stops32h 59m
Qantas Airways
Deal found 5/22![Qantas Airways logo]()
$1,881
This United Airlines deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 8/37:23 pm
STL
- BNE
1 stop20h 07m
United Airlines
Mon 8/316:55 am
BNE
- STL
2 stops26h 44m
United Airlines
Deal found 5/21![United Airlines logo]()
$1,624
This Air Canada deal was found by Cheapflights users on 5/22. Clicking the “Pick Dates” 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 10/274:15 pm
STL
- AVV
3 stops63h 00m
Multiple Airlines
Tue 11/106:00 am
AVV
- STL
3 stops50h 30m
Multiple Airlines
Deal found 5/22![Multiple Airlines logo]()
$1,514
This oojo deal was found by Cheapflights users on 5/24. 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.
Tue 10/275:11 pm
STL
- AVV
2 stops28h 54m
Qantas Airways
Wed 11/1110:20 am
AVV
- STL
2 stops23h 20m
Qantas Airways
Deal found 5/24![Qantas Airways logo]()
$1,949
This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 7/105:10 am
STL
- BNE
2 stops34h 20m
United Airlines
Sat 7/256:55 am
BNE
- STL
2 stops26h 22m
United Airlines
Deal found 5/19![United Airlines logo]()
$1,704
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated May 24, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated May 24, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/234:45 pm
STL
- SYD
2 stops23h 35m
Multiple Airlines
Thu 5/289:20 am
SYD
- STL
2 stops41h 46m
Multiple Airlines
Deal found 5/21![Multiple Airlines logo]()
$1,281
This KAYAK deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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.
Sat 5/237:23 pm
STL
- SYD
1 stop20h 32m
Air New Zealand
Sat 5/309:30 am
SYD
- STL
2 stops26h 20m
Air New Zealand
Deal found 5/19![Air New Zealand logo]()
$1,435
This Air Canada deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/21:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Fri 6/59:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 5/19![Air Canada logo]()
$1,228
This Air Canada deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 6/31:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Tue 6/99:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 5/19![Air Canada logo]()
$1,190
This Expedia deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” 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.
Mon 6/86:35 am
STL
- MEL
1 stop33h 10m
Qantas Airways
Fri 7/319:45 am
MEL
- STL
1 stop29h 14m
Qantas Airways
Deal found 5/20![Qantas Airways logo]()
$1,030
This American Airlines deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/81:19 pm
STL
- MEL
2 stops26h 26m
American Airlines
Fri 7/319:45 am
MEL
- STL
2 stops25h 08m
American Airlines
Deal found 5/20![American Airlines logo]()
$1,086
This CheapOair deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/105:10 am
STL
- SYD
2 stops35h 10m
Air Canada
Wed 6/179:20 am
SYD
- STL
2 stops53h 37m
Air Canada
Deal found 5/20![Air Canada logo]()
$1,311
This United Airlines deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/107:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Wed 6/1710:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/23![United Airlines logo]()
$1,331
This KAYAK deal was found by Cheapflights users on 5/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/101:13 pm
STL
- SYD
2 stops26h 42m
Air New Zealand
Wed 6/1710:20 am
SYD
- STL
2 stops21h 13m
Air New Zealand
Deal found 5/23![Air New Zealand logo]()
$1,335
This United Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 6/164:48 pm
STL
- SYD
2 stops23h 07m
United Airlines
Tue 6/2310:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/19![United Airlines logo]()
$1,332
This FlightHub deal was found by Cheapflights users on 5/20. Clicking the “Pick Dates” 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.
Wed 6/171:05 pm
STL
- BNE
2 stops27h 00m
Air Canada
Wed 6/2410:00 am
BNE
- STL
2 stops41h 21m
Air Canada
Deal found 5/20![Air Canada logo]()
$1,418
This Justfly.com deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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.
Sat 6/271:20 pm
STL
- BNE
2 stops50h 45m
Air Canada
Sun 7/510:00 am
BNE
- STL
2 stops43h 02m
Air Canada
Deal found 5/21![Air Canada logo]()
$1,417
One-way flights from St. Louis to AustraliaSearch for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated May 24, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated May 24, 2026.
This American Airlines deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 8/2212:46 pm
STL
- MEL
2 stops25h 14m
American Airlines
Deal found 5/21![American Airlines logo]()
$586
This Delta deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/222:28 pm
STL
- SYD
2 stops25h 22m
Delta
Deal found 5/19![Delta logo]()
$755
This Kiwi.com deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/228:21 pm
STL
- AVV
3 stops59h 29m
Multiple Airlines
Deal found 5/21![Multiple Airlines logo]()
$779
This Kiwi.com deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:11 pm
STL
- MEL
3 stops49h 24m
Multiple Airlines
Deal found 5/21![Multiple Airlines logo]()
$795
This Delta deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 6/186:00 am
STL
- SYD
2 stops33h 50m
Delta
Deal found 5/21![Delta logo]()
$820
This Kiwi.com deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” 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 6/225:06 pm
STL
- SYD
3 stops59h 34m
Multiple Airlines
Deal found 5/19![Multiple Airlines logo]()
$835
This Kiwi.com deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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 6/187:38 pm
STL
- SYD
3 stops32h 12m
Multiple Airlines
Deal found 5/21![Multiple Airlines logo]()
$868
This BusinessClass deal was found by Cheapflights users on 5/21. Clicking the “Pick Dates” 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.
Thu 6/188:40 am
STL
- SYD
1 stop31h 40m
EVA Air
Deal found 5/21![EVA Air logo]()
$975
This American Airlines deal was found by Cheapflights users on 5/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/222:37 pm
STL
- SYD
2 stops25h 28m
American Airlines
Deal found 5/19![American Airlines logo]()
$11,536
Find flight deals from St. Louis to Australia
Keep the following information in mind while searching for St. Louis to Australia flight deals. Data was last updated May 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,030 (Expedia) |
One-way from | $586 (American Airlines) |
Popular in | December |
Cheapest in | March |
Average price | $1,341 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 24, 2026.
Use the filters below to find and compare flights from St. Louis to Australia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/27
3:33 pm-9:30 am
2 stops25h 57m
Melbourne
Wed 11/11
11:15 pm-8:58 am
2 stops26h 43m
$1,086
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Thu 8/6
6:01 am-8:15 am
2 stops35h 14m
Melbourne
Thu 8/20
10:55 am-6:39 pm
1 stop22h 44m
$1,092
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 9/23
5:11 pm-8:00 am
2 stops23h 49m
Sydney Kingsford Smith
Wed 10/7
11:05 am-6:14 pm
2 stops23h 09m
$1,293
Quickest round-trip
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Tue 10/27
3:33 pm-6:30 am
1 stop23h 57m
Brisbane
Wed 11/11
9:15 am-12:37 pm
1 stop19h 22m
$1,303
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Mon 8/3
5:13 pm-10:20 am
2 stops26h 07m
Brisbane
Mon 8/31
9:10 am-6:10 pm
2 stops24h 00m
$1,322
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 6/10
7:23 pm-6:55 am
1 stop20h 32m
Sydney Kingsford Smith
Wed 6/17
10:20 am-6:17 pm
1 stop22h 57m
$1,331
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 7/1
11:25 am-7:00 am
2 stops28h 35m
Sydney Kingsford Smith
Sun 7/19
10:20 am-6:17 pm
1 stop22h 57m
$1,336
St. LouisMelbourne
STL - AVV
STLAVV
Lambert-St Louis
Fri 7/3
6:37 am-2:20 pm
2 stops40h 43m
Melbourne Avalon
Wed 8/5
10:30 am-10:55 pm
2 stops27h 25m
$1,376
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Thu 7/2
4:48 pm-6:55 am
2 stops23h 07m
Sydney Kingsford Smith
Wed 7/29
10:20 am-6:17 pm
1 stop22h 57m
$1,382
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sat 8/22
8:42 am-6:55 am
1 stop31h 13m
Sydney Kingsford Smith
Tue 9/8
9:30 am-4:34 pm
2 stops22h 04m
$1,386
Showing 1-10 of 38 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Australia
Have a flexible travel schedule? Discover the best time to fly to Australia from St. Louis with our price prediction graph.
STL-MEL
STL-SYD
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-MEL
STL-SYD
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 May 24, 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.
Entertainment
7.5
Food
7.6
Boarding
8.2
Crew
8.6
Comfort
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Food
7.6
Boarding
8.2
Crew
8.6
Comfort
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Food
7.6
Boarding
8.2
Crew
8.6
Comfort
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Food
7.6
Boarding
8.2
Crew
8.6
Comfort
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Food
7.6
Boarding
8.2
Crew
8.6
Comfort
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Food
7.6
Boarding
8.2
Crew
8.6
Comfort
8.1
Overall
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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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 May 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Fly to Australia regions
Consider these flights traveling to Australia regions.
Top 5 airlines flying from St. Louis to Australia
Discover the top 5 airlines that operate flights from St. Louis to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$887 | Average$1,264 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$998 | Average$1,325 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,443 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,365 | FlexibilityNo cancel fee | On-time71% |