$711+ Cheap flights from St. Louis (STL) to Australia
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
May 21 — May 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 April 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 April 21, 2026.
This Jetabroad deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:54 pm
STL
- MEL
2 stops33h 26m
Multiple Airlines
Sat 8/157:30 am
MEL
- STL
2 stops27h 56m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$1,272
This United Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Sat 8/1510:55 am
MEL
- STL
1 stop22h 29m
United Airlines
Deal found 4/16![United Airlines logo]()
$1,277
This United Airlines deal was found by Cheapflights users on 4/19. 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.
Sat 6/137:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Mon 7/2010:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,278
This United Airlines deal was found by Cheapflights users on 4/19. 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.
Sat 6/139:23 am
STL
- MEL
2 stops31h 52m
United Airlines
Sun 7/1910:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,282
This United Airlines deal was found by Cheapflights users on 4/20. 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 4/267:05 pm
STL
- SYD
1 stop20h 50m
United Airlines
Sun 5/109:30 am
SYD
- STL
2 stops25h 21m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,293
This United Airlines deal was found by Cheapflights users on 4/20. 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 5/47:06 pm
STL
- SYD
1 stop20h 49m
United Airlines
Mon 5/1810:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,304
This oojo deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/231:19 pm
STL
- SYD
1 stop26h 36m
Qantas Airways
Tue 6/3012:00 pm
SYD
- STL
1 stop19h 33m
Qantas Airways
Deal found 4/18![Qantas Airways logo]()
$1,364
This oojo deal was found by Cheapflights users on 4/20. 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 9/73:35 pm
STL
- SYD
1 stop24h 20m
Qantas Airways
Mon 9/1412:00 pm
SYD
- STL
1 stop21h 14m
Qantas Airways
Deal found 4/20![Qantas Airways logo]()
$1,384
This United Airlines deal was found by Cheapflights users on 4/20. 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 5/317:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Sat 6/1310:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,411
This Qantas Airways deal was found by Cheapflights users on 4/21. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/73:35 pm
STL
- SYD
1 stop24h 20m
Multiple Airlines
Mon 9/1412:00 pm
SYD
- STL
1 stop21h 14m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$1,414
This Delta deal was found by Cheapflights users on 4/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/3111:25 am
STL
- SYD
2 stops28h 25m
Delta
Sat 6/139:15 am
SYD
- STL
2 stops38h 27m
Delta
Deal found 4/20![Delta logo]()
$1,416
This United Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:06 pm
STL
- SYD
1 stop20h 49m
United Airlines
Wed 11/1811:50 am
SYD
- STL
1 stop23h 48m
United Airlines
Deal found 4/16![United Airlines logo]()
$1,417
Best flights from St. Louis to AustraliaDiscover carefully curated flight deals from St. Louis to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 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 April 21, 2026.
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Fri 6/57:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Fri 6/1210:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,278
This oojo deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/231:19 pm
STL
- SYD
1 stop26h 36m
Qantas Airways
Tue 6/3012:00 pm
SYD
- STL
1 stop19h 33m
Qantas Airways
Deal found 4/18![Qantas Airways logo]()
$1,364
This Delta deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:30 am
STL
- SYD
2 stops33h 20m
Delta
Sun 7/199:15 am
SYD
- STL
2 stops38h 04m
Delta
Deal found 4/16![Delta logo]()
$1,422
This BusinessClass deal was found by Cheapflights users on 4/19. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/177:06 pm
STL
- CBR
2 stops24h 04m
Multiple Airlines
Sun 5/246:10 am
CBR
- STL
2 stops27h 07m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$1,575
This Qatar Airways deal was found by Cheapflights users on 4/19. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/35:24 am
STL
- BNE
3 stops59h 46m
Qatar Airways
Wed 5/64:05 pm
BNE
- STL
3 stops46h 51m
Qatar Airways
Deal found 4/19![Qatar Airways logo]()
$2,136
This United Airlines deal was found by Cheapflights users on 4/19. 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.
Sun 6/142:57 pm
STL
- MEL
2 stops26h 18m
United Airlines
Mon 7/2010:55 am
MEL
- STL
2 stops25h 31m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,282
This United Airlines deal was found by Cheapflights users on 4/19. 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.
Sat 6/137:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Wed 7/2210:55 am
MEL
- STL
2 stops28h 02m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,282
This oojo deal was found by Cheapflights users on 4/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/36:35 am
STL
- BNE
1 stop31h 25m
Qantas Airways
Wed 6/108:50 pm
BNE
- STL
2 stops34h 43m
Qantas Airways
Deal found 4/19![Qantas Airways logo]()
$1,439
This United Airlines deal was found by Cheapflights users on 4/20. 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 4/262:40 pm
STL
- SYD
2 stops25h 15m
United Airlines
Sun 5/1010:20 am
SYD
- STL
2 stops25h 23m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,293
This United Airlines deal was found by Cheapflights users on 4/19. 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 5/47:06 pm
STL
- SYD
1 stop20h 49m
United Airlines
Mon 5/1810:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,304
This oojo deal was found by Cheapflights users on 4/20. 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.
Thu 6/47:23 pm
STL
- CNS
2 stops26h 32m
Multiple Airlines
Thu 6/117:10 pm
CNS
- STL
2 stops36h 23m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$1,749
This oojo deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:30 am
STL
- HBA
2 stops47h 20m
Qantas Airways
Mon 10/196:00 am
HBA
- STL
2 stops33h 05m
Qantas Airways
Deal found 4/17![Qantas Airways logo]()
$1,613
This Qantas Airways deal was found by Cheapflights users on 4/19. 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.
Sat 6/272:33 pm
STL
- BNE
3 stops29h 57m
Multiple Airlines
Sun 7/57:40 am
BNE
- STL
2 stops23h 53m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$1,881
This oojo deal was found by Cheapflights users on 4/20. 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 6/86:35 am
STL
- PER
2 stops39h 40m
Qantas Airways
Tue 6/164:25 pm
PER
- STL
2 stops40h 11m
Qantas Airways
Deal found 4/20![Qantas Airways logo]()
$1,746
This United Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:00 am
STL
- HBA
2 stops37h 10m
United Airlines
Mon 10/196:05 am
HBA
- STL
3 stops49h 33m
United Airlines
Deal found 4/17![United Airlines logo]()
$1,576
This Air New Zealand deal was found by Cheapflights users on 4/21. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/51:13 pm
STL
- BNE
3 stops30h 52m
Multiple Airlines
Fri 6/129:40 am
BNE
- STL
2 stops26h 02m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$1,944
This oojo deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:21 am
STL
- PER
2 stops45h 39m
Qantas Airways
Fri 5/1510:30 am
PER
- STL
2 stops26h 29m
Qantas Airways
Deal found 4/17![Qantas Airways logo]()
$1,768
This Qatar Airways deal was found by Cheapflights users on 4/20. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:36 am
STL
- MEL
2 stops43h 14m
Qatar Airways
Sun 7/510:45 pm
MEL
- STL
2 stops40h 14m
Qatar Airways
Deal found 4/20![Qatar Airways logo]()
$2,404
This United Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:00 am
STL
- BNE
2 stops33h 30m
United Airlines
Wed 5/610:30 am
BNE
- STL
2 stops22h 42m
United Airlines
Deal found 4/16![United Airlines logo]()
$1,582
This Qantas Airways deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:11 pm
STL
- HBA
2 stops24h 14m
Qantas Airways
Wed 8/1911:25 am
HBA
- STL
2 stops50h 30m
Qantas Airways
Deal found 4/17![Qantas Airways logo]()
$1,789
This United Airlines deal was found by Cheapflights users on 4/19. 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 6/167:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Thu 7/2310:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,590
This oojo deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:36 am
STL
- PER
2 stops40h 29m
Qantas Airways
Fri 7/175:55 pm
PER
- STL
2 stops37h 39m
Qantas Airways
Deal found 4/17![Qantas Airways logo]()
$1,845
This Air New Zealand deal was found by Cheapflights users on 4/20. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/89:23 am
STL
- PER
3 stops41h 37m
Multiple Airlines
Tue 6/167:50 pm
PER
- STL
3 stops49h 51m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$2,275
This United Airlines deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/256:01 am
STL
- BNE
3 stops40h 19m
United Airlines
Sun 7/510:30 am
BNE
- STL
2 stops44h 16m
United Airlines
Deal found 4/18![United Airlines logo]()
$1,629
This oojo deal was found by Cheapflights users on 4/20. 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.
Fri 6/57:23 pm
STL
- PER
2 stops50h 52m
Qantas Airways
Fri 6/124:25 pm
PER
- STL
2 stops44h 31m
Qantas Airways
Deal found 4/20![Qantas Airways logo]()
$1,851
This Qantas Airways deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/84:30 pm
STL
- PER
3 stops32h 05m
Multiple Airlines
Fri 5/1510:30 am
PER
- STL
2 stops26h 29m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$2,403
This United Airlines deal was found by Cheapflights users on 4/21. 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.
Fri 6/57:23 pm
STL
- BNE
1 stop20h 07m
United Airlines
Fri 6/1210:30 am
BNE
- STL
1 stop22h 47m
United Airlines
Deal found 4/21![United Airlines logo]()
$1,678
This oojo deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:21 am
STL
- PER
2 stops45h 39m
Qantas Airways
Thu 5/76:05 am
PER
- STL
2 stops30h 54m
Qantas Airways
Deal found 4/18![Qantas Airways logo]()
$2,018
This United Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:06 pm
STL
- CBR
2 stops27h 09m
United Airlines
Fri 5/228:10 am
CBR
- STL
2 stops25h 07m
United Airlines
Deal found 4/16![United Airlines logo]()
$1,701
This United Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:06 pm
STL
- CBR
2 stops27h 09m
United Airlines
Sat 5/307:15 am
CBR
- STL
2 stops26h 02m
United Airlines
Deal found 4/17![United Airlines logo]()
$1,702
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated April 21, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated April 21, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 4/21. 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.
Wed 4/226:21 am
STL
- SYD
1 stop33h 44m
Qantas Airways
Wed 4/2912:00 pm
SYD
- STL
1 stop22h 30m
Qantas Airways
Deal found 4/21![Qantas Airways logo]()
$1,418
This American Airlines deal was found by Cheapflights users on 4/21. 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.
Wed 4/223:38 pm
STL
- SYD
2 stops24h 52m
American Airlines
Wed 4/2912:00 pm
SYD
- STL
1 stop22h 30m
American Airlines
Deal found 4/21![American Airlines logo]()
$1,419
This American Airlines deal was found by Cheapflights users on 4/19. 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.
Wed 4/229:34 am
STL
- BNE
2 stops28h 26m
American Airlines
Fri 5/228:35 pm
BNE
- STL
2 stops27h 16m
American Airlines
Deal found 4/19![American Airlines logo]()
$1,619
This United Airlines deal was found by Cheapflights users on 4/20. 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 4/262:40 pm
STL
- SYD
2 stops25h 15m
United Airlines
Sun 5/1010:20 am
SYD
- STL
2 stops25h 23m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,293
This United Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/297:45 am
STL
- BNE
2 stops31h 45m
United Airlines
Wed 5/610:30 am
BNE
- STL
1 stop22h 52m
United Airlines
Deal found 4/16![United Airlines logo]()
$1,582
This United Airlines deal was found by Cheapflights users on 4/20. 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 5/47:06 pm
STL
- SYD
1 stop20h 49m
United Airlines
Mon 5/1810:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,304
This United Airlines deal was found by Cheapflights users on 4/20. 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 5/1010:25 am
STL
- SYD
2 stops29h 35m
United Airlines
Sun 6/2810:20 am
SYD
- STL
2 stops25h 23m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,441
This BusinessClass deal was found by Cheapflights users on 4/19. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/177:06 pm
STL
- CBR
2 stops24h 04m
Multiple Airlines
Sun 5/246:10 am
CBR
- STL
2 stops27h 07m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$1,575
This United Airlines deal was found by Cheapflights users on 4/20. 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 5/317:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Thu 6/1110:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,411
This Delta deal was found by Cheapflights users on 4/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/3111:25 am
STL
- SYD
2 stops28h 25m
Delta
Sat 6/139:15 am
SYD
- STL
2 stops38h 27m
Delta
Deal found 4/20![Delta logo]()
$1,416
This United Airlines deal was found by Cheapflights users on 4/20. 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 5/317:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Fri 6/1210:20 am
SYD
- STL
2 stops44h 26m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,430
This United Airlines deal was found by Cheapflights users on 4/20. 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 5/317:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Sat 6/1310:20 am
SYD
- STL
2 stops44h 26m
United Airlines
Deal found 4/20![United Airlines logo]()
$1,506
One-way flights from St. Louis to AustraliaSearch for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated April 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 April 21, 2026.
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Sat 5/164:15 pm
STL
- MEL
2 stops25h 00m
United Airlines
Deal found 4/20![United Airlines logo]()
$711
This Kiwi.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/143:33 pm
STL
- PER
3 stops58h 22m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$723
This Kiwi.com deal was found by Cheapflights users on 4/18. 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.
Mon 9/146:00 am
STL
- BNE
3 stops37h 35m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$731
This Kiwi.com deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/314:19 pm
STL
- SYD
2 stops48h 11m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$737
This KAYAK deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/317:23 pm
STL
- SYD
1 stop20h 32m
Air New Zealand
Deal found 4/16![Air New Zealand logo]()
$768
This Kiwi.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:51 pm
STL
- PER
3 stops58h 39m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$795
This Air Canada deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/142:40 pm
STL
- BNE
2 stops25h 25m
Air Canada
Deal found 4/18![Air Canada logo]()
$838
This FlightHub deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:05 am
STL
- MEL
3 stops37h 30m
Air Canada
Deal found 4/17![Air Canada logo]()
$849
This Kiwi.com deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/159:18 pm
STL
- PER
3 stops52h 37m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$891
This Kiwi.com deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/168:08 pm
STL
- PER
3 stops53h 47m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$896
This oojo deal was found by Cheapflights users on 4/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:30 am
STL
- BNE
1 stop31h 30m
Qantas Airways
Deal found 4/18![Qantas Airways logo]()
$929
This United Airlines deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/198:30 am
STL
- PER
2 stops42h 30m
United Airlines
Deal found 4/17![United Airlines logo]()
$962
Find flight deals from St. Louis to Australia
Keep the following information in mind while searching for St. Louis to Australia flight deals. Data was last updated April 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,278 (United Airlines) |
One-way from | $711 (United Airlines) |
Popular in | December |
Cheapest in | March |
Average price | $1,391 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 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
Fri 6/5
7:23 pm-8:15 am
1 stop21h 52m
Melbourne
Fri 6/12
10:55 am-6:17 pm
1 stop22h 22m
$1,278
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sun 6/14
2:57 pm-8:15 am
2 stops26h 18m
Melbourne
Mon 7/20
10:55 am-9:26 pm
2 stops25h 31m
$1,282
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sat 6/13
7:23 pm-8:15 am
1 stop21h 52m
Melbourne
Wed 7/22
10:55 am-11:57 pm
2 stops28h 02m
$1,282
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sun 4/26
2:40 pm-6:55 am
2 stops25h 15m
Sydney Kingsford Smith
Sun 5/10
10:20 am-8:43 pm
2 stops25h 23m
$1,293
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
7:06 pm-6:55 am
1 stop20h 49m
Sydney Kingsford Smith
Mon 5/18
10:20 am-6:22 pm
1 stop23h 02m
$1,304
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Tue 6/23
1:19 pm-6:55 am
1 stop26h 36m
Sydney Kingsford Smith
Tue 6/30
12:00 pm-4:33 pm
1 stop19h 33m
$1,364
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 7/13
6:30 am-6:50 am
2 stops33h 20m
Sydney Kingsford Smith
Sun 7/19
9:15 am-8:19 am
2 stops38h 04m
$1,422
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Wed 6/3
6:35 am-5:00 am
1 stop31h 25m
Brisbane
Wed 6/10
8:50 pm-4:33 pm
2 stops34h 43m
$1,439
St. LouisCanberra
STL - CBR
STLCBR
Lambert-St Louis
Sun 5/17
7:06 pm-10:10 am
2 stops24h 04m
Canberra
Sun 5/24
6:10 am-6:17 pm
2 stops27h 07m
$1,575
St. LouisHobart
STL - HBA
STLHBA
Lambert-St Louis
Mon 10/12
7:00 am-12:10 pm
2 stops37h 10m
Hobart
Mon 10/19
6:05 am-3:38 pm
3 stops49h 33m
$1,576
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-MEL
STL-BNE
STL-SYD
STL-AVV
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-BNE
STL-SYD
STL-AVV
What is the cheapest month to book a flight from St. Louis to Australia?
Currently, May is the cheapest month in which you can book a flight from St. Louis to Australia (average of $310). Flying from St. Louis to Australia in June is currently the most expensive (average of $1,225). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing Australia
Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated April 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.
Crew
8.6
Entertainment
7.5
Food
7.5
Boarding
8.2
Overall
8.1
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Crew
8.6
Entertainment
7.5
Food
7.5
Boarding
8.2
Overall
8.1
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Crew
8.6
Entertainment
7.5
Food
7.5
Boarding
8.2
Overall
8.1
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Crew
8.6
Entertainment
7.5
Food
7.5
Boarding
8.2
Overall
8.1
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Crew
8.6
Entertainment
7.5
Food
7.5
Boarding
8.2
Overall
8.1
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Crew
8.6
Entertainment
7.5
Food
7.5
Boarding
8.2
Overall
8.1
Comfort
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for St. Louis to Australia
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Australia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Australia by cabin class
Find flights from St. Louis to Australia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Australia flights
Browse other St. Louis and Australia flight options. Last updated on April 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 April 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$887 | Average$1,268 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$975 | Average$1,324 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,429 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,365 | FlexibilityNo cancel fee | On-time71% |