$538+ 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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Jul 21 — Jul 281
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from St. Louis to AustraliaExplore the most affordable flight options available from St. Louis to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 21, 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 21, 2026.
This American Airlines deal was found by Cheapflights users on 6/20. 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 8/2212:45 pm
STL
- MEL
2 stops27h 00m
American Airlines
Mon 8/319:45 am
MEL
- STL
2 stops24h 14m
American Airlines
Deal found 6/20![American Airlines logo]()
$1,084
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Fri 8/284:40 pm
STL
- MEL
2 stops24h 35m
United Airlines
Fri 9/410:55 am
MEL
- STL
1 stop22h 44m
United Airlines
Deal found 6/17![United Airlines logo]()
$1,091
This American Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:30 am
STL
- MEL
1 stop32h 15m
American Airlines
Tue 11/311:15 pm
MEL
- STL
2 stops26h 43m
American Airlines
Deal found 6/18![American Airlines logo]()
$1,093
This United Airlines deal was found by Cheapflights users on 6/19. 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.
Mon 8/311:36 pm
STL
- MEL
2 stops26h 54m
United Airlines
Thu 9/1010:55 am
MEL
- STL
2 stops24h 43m
United Airlines
Deal found 6/19![United Airlines logo]()
$1,095
This oojo deal was found by Cheapflights users on 6/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:30 am
STL
- MEL
1 stop35h 00m
Qantas Airways
Wed 11/1111:15 pm
MEL
- STL
1 stop41h 27m
Qantas Airways
Deal found 6/21![Qantas Airways logo]()
$1,099
This United Airlines deal was found by Cheapflights users on 6/19. 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.
Mon 8/248:42 am
STL
- MEL
1 stop32h 33m
United Airlines
Mon 9/76:30 am
MEL
- STL
2 stops27h 09m
United Airlines
Deal found 6/19![United Airlines logo]()
$1,121
This United Airlines deal was found by Cheapflights users on 6/17. 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 8/223:35 pm
STL
- MEL
2 stops25h 40m
United Airlines
Mon 8/3110:10 am
MEL
- STL
3 stops68h 28m
United Airlines
Deal found 6/17![United Airlines logo]()
$1,133
This oojo deal was found by Cheapflights users on 6/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:30 am
STL
- MEL
1 stop32h 15m
Qantas Airways
Tue 11/311:15 pm
MEL
- STL
1 stop41h 27m
Qantas Airways
Deal found 6/21![Qantas Airways logo]()
$1,154
This Delta deal was found by Cheapflights users on 6/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/212:28 pm
STL
- SYD
2 stops25h 22m
Delta
Sun 7/59:15 am
SYD
- STL
2 stops29h 08m
Delta
Deal found 6/18![Delta logo]()
$1,193
This oojo deal was found by Cheapflights users on 6/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:13 pm
STL
- SYD
2 stops33h 37m
Qantas Airways
Wed 11/2511:15 am
SYD
- STL
1 stop29h 27m
Qantas Airways
Deal found 6/20![Qantas Airways logo]()
$1,240
This oojo deal was found by Cheapflights users on 6/17. 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 11/167:00 am
STL
- SYD
1 stop33h 00m
Qantas Airways
Sat 11/215:50 pm
SYD
- STL
2 stops38h 39m
Qantas Airways
Deal found 6/17![Qantas Airways logo]()
$1,241
This Delta deal was found by Cheapflights users on 6/19. 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 8/318:48 am
STL
- SYD
2 stops31h 02m
Delta
Wed 9/99:15 am
SYD
- STL
2 stops22h 32m
Delta
Deal found 6/19![Delta logo]()
$1,253
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 21, 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 21, 2026.
This American Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:30 am
STL
- MEL
1 stop32h 15m
American Airlines
Tue 11/311:15 pm
MEL
- STL
2 stops26h 43m
American Airlines
Deal found 6/18![American Airlines logo]()
$1,093
This United Airlines deal was found by Cheapflights users on 6/19. 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.
Mon 8/241:36 pm
STL
- MEL
2 stops26h 54m
United Airlines
Mon 9/710:55 am
MEL
- STL
2 stops40h 02m
United Airlines
Deal found 6/19![United Airlines logo]()
$1,095
This oojo deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:30 am
STL
- MEL
1 stop35h 00m
Qantas Airways
Wed 11/1111:15 pm
MEL
- STL
1 stop41h 27m
Qantas Airways
Deal found 6/18![Qantas Airways logo]()
$1,099
This Delta deal was found by Cheapflights users on 6/19. 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 8/318:48 am
STL
- SYD
2 stops31h 02m
Delta
Wed 9/99:15 am
SYD
- STL
2 stops22h 32m
Delta
Deal found 6/19![Delta logo]()
$1,253
This FlightHub deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:10 pm
STL
- BNE
2 stops27h 55m
Air Canada
Mon 8/3110:00 am
BNE
- STL
2 stops43h 02m
Air Canada
Deal found 6/17![Air Canada logo]()
$1,416
This Air Canada deal was found by Cheapflights users on 6/21. 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.
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 6/21![Multiple Airlines logo]()
$1,437
This United Airlines deal was found by Cheapflights users on 6/19. 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 8/253:13 pm
STL
- MEL
2 stops26h 02m
United Airlines
Mon 9/710:55 am
MEL
- STL
2 stops40h 02m
United Airlines
Deal found 6/19![United Airlines logo]()
$1,095
This Qatar Airways deal was found by Cheapflights users on 6/16. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:13 pm
STL
- CBR
3 stops45h 07m
Qatar Airways
Sat 11/1412:30 pm
CBR
- STL
3 stops45h 10m
Qatar Airways
Deal found 6/16![Qatar Airways logo]()
$2,286
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Fri 8/283:35 pm
STL
- MEL
2 stops24h 55m
United Airlines
Fri 9/49:30 am
MEL
- STL
2 stops27h 30m
United Airlines
Deal found 6/17![United Airlines logo]()
$1,096
This Delta deal was found by Cheapflights users on 6/16. 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.
Fri 7/38:49 am
STL
- SYD
2 stops31h 01m
Delta
Sat 7/189:15 am
SYD
- STL
2 stops26h 22m
Delta
Deal found 6/16![Delta logo]()
$1,293
This United Airlines deal was found by Cheapflights users on 6/19. 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.
Wed 8/268:42 am
STL
- MEL
1 stop32h 33m
United Airlines
Mon 9/77:15 am
MEL
- STL
2 stops26h 24m
United Airlines
Deal found 6/19![United Airlines logo]()
$1,121
This BusinessClass deal was found by Cheapflights users on 6/16. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:16 am
STL
- MEL
3 stops32h 14m
Qantas Airways
Thu 9/108:15 am
MEL
- STL
2 stops30h 25m
Qantas Airways
Deal found 6/16![Qantas Airways logo]()
$1,408
This Air Canada deal was found by Cheapflights users on 6/21. 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.
Tue 10/202:40 pm
STL
- AVV
3 stops33h 25m
Multiple Airlines
Tue 11/36:00 am
AVV
- STL
3 stops50h 30m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$1,437
This Delta deal was found by Cheapflights users on 6/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:27 pm
STL
- SYD
2 stops25h 23m
Delta
Wed 10/710:15 am
SYD
- STL
2 stops26h 22m
Delta
Deal found 6/18![Delta logo]()
$1,313
This United Airlines deal was found by Cheapflights users on 6/17. 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 8/223:35 pm
STL
- MEL
2 stops25h 40m
United Airlines
Mon 8/3110:10 am
MEL
- STL
3 stops68h 28m
United Airlines
Deal found 6/17![United Airlines logo]()
$1,133
This Air Canada deal was found by Cheapflights users on 6/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:55 am
STL
- MEL
3 stops35h 40m
Multiple Airlines
Tue 11/37:25 am
MEL
- STL
3 stops49h 05m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$1,459
This Qantas Airways deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:20 pm
STL
- CBR
2 stops29h 00m
Qantas Airways
Sat 11/146:05 am
CBR
- STL
2 stops34h 37m
Qantas Airways
Deal found 6/16![Qantas Airways logo]()
$1,638
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Tue 9/17:25 am
STL
- MEL
2 stops33h 50m
United Airlines
Thu 9/1010:55 am
MEL
- STL
1 stop22h 44m
United Airlines
Deal found 6/16![United Airlines logo]()
$1,280
This Air Canada deal was found by Cheapflights users on 6/20. 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 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 6/20![Multiple Airlines logo]()
$1,565
This oojo deal was found by Cheapflights users on 6/17. 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 8/36:37 am
STL
- BNE
1 stop31h 23m
Qantas Airways
Mon 8/3112:40 pm
BNE
- STL
2 stops25h 19m
Qantas Airways
Deal found 6/17![Qantas Airways logo]()
$1,697
This United Airlines deal was found by Cheapflights users on 6/21. 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.
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 6/21![United Airlines logo]()
$1,308
This Air Canada deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/222:40 pm
STL
- AVV
3 stops34h 25m
Multiple Airlines
Mon 8/318:55 pm
AVV
- STL
3 stops38h 12m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$1,589
This Ovago deal was found by Cheapflights users on 6/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:44 am
STL
- CBR
3 stops33h 36m
Qantas Airways
Tue 7/216:10 am
CBR
- STL
2 stops30h 38m
Qantas Airways
Deal found 6/16![Qantas Airways logo]()
$1,701
This Expedia deal was found by Cheapflights users on 6/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:00 am
STL
- AVV
2 stops41h 10m
Multiple Airlines
Thu 9/108:55 pm
AVV
- STL
2 stops41h 45m
Multiple Airlines
Deal found 6/19![Multiple Airlines logo]()
$1,600
This United Airlines deal was found by Cheapflights users on 6/21. 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.
Thu 10/13:12 pm
STL
- SYD
2 stops24h 48m
United Airlines
Mon 10/1210:30 am
SYD
- STL
2 stops28h 00m
United Airlines
Deal found 6/21![United Airlines logo]()
$1,362
This Air Canada deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:55 am
STL
- AVV
3 stops38h 15m
Multiple Airlines
Thu 9/108:55 pm
AVV
- STL
3 stops56h 05m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$1,626
This United Airlines deal was found by Cheapflights users on 6/19. 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.
Mon 8/318:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Thu 9/1010:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 6/19![United Airlines logo]()
$1,380
This oojo deal was found by Cheapflights users on 6/16. 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.
Fri 8/286:00 am
STL
- AVV
2 stops49h 50m
Multiple Airlines
Fri 9/46:00 am
AVV
- STL
2 stops31h 59m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$1,645
This United Airlines deal was found by Cheapflights users on 6/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/157:05 pm
STL
- SYD
1 stop21h 15m
United Airlines
Wed 11/2511:50 am
SYD
- STL
1 stop27h 20m
United Airlines
Deal found 6/20![United Airlines logo]()
$1,458
This Air New Zealand deal was found by Cheapflights users on 6/18. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:36 pm
STL
- SYD
3 stops30h 04m
Multiple Airlines
Wed 10/711:55 am
SYD
- STL
3 stops27h 49m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$1,721
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated June 21, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated June 21, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/212:28 pm
STL
- SYD
2 stops25h 22m
Delta
Sun 7/59:15 am
SYD
- STL
2 stops29h 08m
Delta
Deal found 6/18![Delta logo]()
$1,193
This United Airlines deal was found by Cheapflights users on 6/18. 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 6/217:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Sun 7/510:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 6/18![United Airlines logo]()
$1,320
This United Airlines deal was found by Cheapflights users on 6/16. 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 6/219:06 am
STL
- SYD
2 stops30h 49m
United Airlines
Sun 6/289:30 am
SYD
- STL
2 stops28h 15m
United Airlines
Deal found 6/16![United Airlines logo]()
$1,335
This BusinessClass deal was found by Cheapflights users on 6/16. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/217:23 pm
STL
- SYD
1 stop20h 32m
Air New Zealand
Sun 6/2810:20 am
SYD
- STL
1 stop22h 57m
Air New Zealand
Deal found 6/16![Air New Zealand logo]()
$1,563
This United Airlines deal was found by Cheapflights users on 6/18. 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.
Tue 6/237:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Tue 6/3010:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 6/18![United Airlines logo]()
$1,330
This FlightHub deal was found by Cheapflights users on 6/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/277:05 pm
STL
- BNE
2 stops45h 00m
Air Canada
Sun 7/510:00 am
BNE
- STL
2 stops47h 42m
Air Canada
Deal found 6/21![Air Canada logo]()
$1,611
This Delta deal was found by Cheapflights users on 6/19. 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.
Thu 7/210:20 am
STL
- SYD
2 stops29h 30m
Delta
Thu 7/239:15 am
SYD
- STL
2 stops24h 45m
Delta
Deal found 6/19![Delta logo]()
$1,293
This United Airlines deal was found by Cheapflights users on 6/19. 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 12m
United Airlines
Thu 7/2310:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 6/19![United Airlines logo]()
$1,430
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Fri 7/37:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Sat 7/189:30 am
SYD
- STL
2 stops28h 59m
United Airlines
Deal found 6/16![United Airlines logo]()
$1,435
This American Airlines deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:13 pm
STL
- SYD
1 stop22h 42m
American Airlines
Sat 7/185:50 pm
SYD
- STL
1 stop21h 09m
American Airlines
Deal found 6/16![American Airlines logo]()
$1,447
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/163:41 pm
STL
- SYD
2 stops29h 09m
Multiple Airlines
Thu 7/235:50 pm
SYD
- STL
1 stop21h 09m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$1,391
This United Airlines deal was found by Cheapflights users on 6/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/207:23 pm
STL
- CBR
2 stops24h 17m
United Airlines
Mon 7/278:10 am
CBR
- STL
2 stops25h 07m
United Airlines
Deal found 6/20![United Airlines logo]()
$1,479
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 21, 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 21, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/148:08 pm
STL
- SYD
3 stops48h 42m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$538
This Kiwi.com deal was found by Cheapflights users on 6/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/95:32 pm
STL
- BNE
3 stops48h 43m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$542
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/163:41 pm
STL
- SYD
2 stops29h 09m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$580
This oojo deal was found by Cheapflights users on 6/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:00 am
STL
- MEL
1 stop33h 30m
Qantas Airways
Deal found 6/20![Qantas Airways logo]()
$602
This American Airlines deal was found by Cheapflights users on 6/20. 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 11/93:59 pm
STL
- MEL
2 stops24h 31m
American Airlines
Deal found 6/20![American Airlines logo]()
$625
This oojo deal was found by Cheapflights users on 6/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/91:20 pm
STL
- BNE
1 stop25h 10m
Qantas Airways
Deal found 6/20![Qantas Airways logo]()
$636
This American Airlines deal was found by Cheapflights users on 6/20. 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 11/92:29 pm
STL
- BNE
2 stops23h 21m
American Airlines
Deal found 6/20![American Airlines logo]()
$656
This United Airlines deal was found by Cheapflights users on 6/18. 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.
Tue 9/110:53 am
STL
- MEL
2 stops30h 22m
United Airlines
Deal found 6/18![United Airlines logo]()
$710
This KAYAK deal was found by Cheapflights users on 6/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:05 pm
STL
- AVV
2 stops26h 00m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$733
This United Airlines deal was found by Cheapflights users on 6/19. 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 7/29:20 am
STL
- SYD
2 stops30h 40m
United Airlines
Deal found 6/19![United Airlines logo]()
$820
This Kiwi.com deal was found by Cheapflights users on 6/19. 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.
Thu 7/27:24 pm
STL
- SYD
3 stops33h 41m
Multiple Airlines
Deal found 6/19![Multiple Airlines logo]()
$846
This Air Canada deal was found by Cheapflights users on 6/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:55 am
STL
- AVV
3 stops38h 15m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$1,047
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 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,084 (American Airlines) |
One-way from | $538 (Kiwi.com) |
Popular in | December |
Cheapest in | March |
Average price | $1,658 |
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 21, 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 10/20
6:30 am-6:45 am
1 stop32h 15m
Melbourne
Tue 11/3
11:15 pm-8:58 am
2 stops26h 43m
$1,093
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Mon 8/24
1:36 pm-7:30 am
2 stops26h 54m
Melbourne
Mon 9/7
10:55 am-11:57 am
2 stops40h 02m
$1,095
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 8/25
3:13 pm-8:15 am
2 stops26h 02m
Melbourne
Mon 9/7
10:55 am-11:57 am
2 stops40h 02m
$1,095
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Fri 8/28
3:35 pm-7:30 am
2 stops24h 55m
Melbourne
Fri 9/4
9:30 am-10:00 pm
2 stops27h 30m
$1,096
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/27
6:30 am-9:30 am
1 stop35h 00m
Melbourne
Wed 11/11
11:15 pm-11:42 pm
1 stop41h 27m
$1,099
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Wed 8/26
8:42 am-8:15 am
1 stop32h 33m
Melbourne
Mon 9/7
7:15 am-6:39 pm
2 stops26h 24m
$1,121
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sat 8/22
3:35 pm-8:15 am
2 stops25h 40m
Melbourne
Mon 8/31
10:10 am-3:38 pm
3 stops68h 28m
$1,133
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 8/31
8:48 am-6:50 am
2 stops31h 02m
Sydney Kingsford Smith
Wed 9/9
9:15 am-4:47 pm
2 stops22h 32m
$1,253
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 9/1
7:25 am-8:15 am
2 stops33h 50m
Melbourne
Thu 9/10
10:55 am-6:39 pm
1 stop22h 44m
$1,280
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Fri 7/3
8:49 am-6:50 am
2 stops31h 01m
Sydney Kingsford Smith
Sat 7/18
9:15 am-8:37 pm
2 stops26h 22m
$1,293
Showing 1-10 of 50 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-BNE
STL-AVV
STL-CBR
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-BNE
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 June 21, 2026.
Read reviews from past customers who have flown Fiji Airways,Qantas Airways, andUnited Airlines from St. Louis to Australia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.1
Crew
8.5
Food
7.5
Entertainment
7.5
Boarding
8.2
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Overall
8.1
Crew
8.5
Food
7.5
Entertainment
7.5
Boarding
8.2
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Overall
8.1
Crew
8.5
Food
7.5
Entertainment
7.5
Boarding
8.2
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Overall
8.1
Crew
8.5
Food
7.5
Entertainment
7.5
Boarding
8.2
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Overall
8.1
Crew
8.5
Food
7.5
Entertainment
7.5
Boarding
8.2
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Overall
8.1
Crew
8.5
Food
7.5
Entertainment
7.5
Boarding
8.2
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 June 21, 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 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$857 | Average$1,313 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,029 | Average$1,416 | 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% |