$630+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Aug 4 — Aug 111
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 July 5, 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 July 5, 2026.
This oojo deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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 8/173:32 pm
STL
- SYD
1 stop24h 23m
Qantas Airways
Mon 8/2412:00 pm
SYD
- STL
1 stop21h 05m
Qantas Airways
Deal found 7/2![Qantas Airways logo]()
$1,146
This Bravofly deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:00 am
STL
- SYD
1 stop34h 30m
Qantas Airways
Mon 8/179:10 am
SYD
- STL
1 stop28h 49m
Qantas Airways
Deal found 6/30![Qantas Airways logo]()
$1,152
This oojo deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 11/96:13 pm
STL
- BNE
1 stop20h 17m
Qantas Airways
Sat 11/149:40 am
BNE
- STL
1 stop21h 49m
Qantas Airways
Deal found 7/3![Qantas Airways logo]()
$1,185
This KAYAK deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” 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 7/17:23 pm
STL
- SYD
1 stop20h 32m
Air New Zealand
Wed 7/810:20 am
SYD
- STL
1 stop22h 57m
Air New Zealand
Deal found 6/30![Air New Zealand logo]()
$1,185
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:48 pm
STL
- SYD
2 stops23h 12m
United Airlines
Mon 8/1710:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 7/1![United Airlines logo]()
$1,186
This American Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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 10/278:48 am
STL
- MEL
1 stop28h 12m
American Airlines
Wed 11/1111:15 pm
MEL
- STL
2 stops26h 43m
American Airlines
Deal found 7/2![American Airlines logo]()
$1,192
This oojo deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:11 pm
STL
- SYD
1 stop22h 44m
Qantas Airways
Tue 9/85:50 pm
SYD
- STL
1 stop20h 09m
Qantas Airways
Deal found 7/3![Qantas Airways logo]()
$1,194
This American Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:00 am
STL
- SYD
1 stop34h 05m
American Airlines
Mon 8/179:10 am
SYD
- STL
2 stops23h 55m
American Airlines
Deal found 6/30![American Airlines logo]()
$1,196
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/161:36 pm
STL
- MEL
2 stops27h 39m
United Airlines
Sun 8/2310:55 am
MEL
- STL
1 stop22h 04m
United Airlines
Deal found 7/1![United Airlines logo]()
$1,198
This United Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:05 pm
STL
- MEL
1 stop22h 25m
United Airlines
Wed 11/1112:45 pm
MEL
- STL
1 stop26h 25m
United Airlines
Deal found 7/3![United Airlines logo]()
$1,199
This United Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:29 pm
STL
- MEL
2 stops27h 46m
United Airlines
Tue 11/312:45 pm
MEL
- STL
2 stops24h 49m
United Airlines
Deal found 7/3![United Airlines logo]()
$1,203
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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.
Sat 8/85:00 pm
STL
- SYD
2 stops46h 50m
Delta
Wed 8/199:15 am
SYD
- STL
2 stops24h 40m
Delta
Deal found 7/2![Delta logo]()
$1,205
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 July 5, 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 July 5, 2026.
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Sun 8/3010:20 am
SYD
- STL
1 stop22h 39m
United Airlines
Deal found 7/2![United Airlines logo]()
$1,186
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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 9/46:30 am
STL
- SYD
2 stops33h 20m
Delta
Wed 9/169:15 am
SYD
- STL
2 stops25h 43m
Delta
Deal found 7/2![Delta logo]()
$1,360
This FlightHub deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 stops51h 55m
Air Canada
Mon 8/3110:00 am
BNE
- STL
2 stops41h 40m
Air Canada
Deal found 7/3![Air Canada logo]()
$1,392
This Air Canada deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:05 pm
STL
- AVV
3 stops63h 10m
Multiple Airlines
Wed 11/116:00 am
AVV
- STL
3 stops50h 26m
Multiple Airlines
Deal found 7/1![Multiple Airlines logo]()
$1,435
This American Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/173:32 pm
STL
- PER
2 stops30h 43m
American Airlines
Mon 8/2411:55 pm
PER
- STL
2 stops36h 04m
American Airlines
Deal found 6/30![American Airlines logo]()
$1,505
This oojo deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:00 am
STL
- PER
2 stops45h 45m
Qatar Airways
Sat 12/1210:45 pm
PER
- STL
2 stops39h 14m
Qatar Airways
Deal found 7/2![Qatar Airways logo]()
$1,564
This oojo deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 8/316:15 pm
BNE
- STL
2 stops43h 44m
Qantas Airways
Deal found 7/4![Qantas Airways logo]()
$1,610
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:05 pm
STL
- MEL
1 stop22h 25m
United Airlines
Wed 11/1112:45 pm
MEL
- STL
1 stop26h 25m
United Airlines
Deal found 7/2![United Airlines logo]()
$1,199
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:29 pm
STL
- MEL
2 stops27h 46m
United Airlines
Tue 11/312:45 pm
MEL
- STL
2 stops24h 49m
United Airlines
Deal found 7/2![United Airlines logo]()
$1,203
This Delta deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/110:29 am
STL
- SYD
2 stops29h 21m
Delta
Mon 10/1210:15 am
SYD
- STL
2 stops26h 26m
Delta
Deal found 7/1![Delta logo]()
$1,360
This Air Canada deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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 8/1712:10 pm
STL
- BNE
2 stops51h 55m
Air Canada
Mon 8/2410:00 am
BNE
- STL
2 stops47h 42m
Air Canada
Deal found 7/2![Air Canada logo]()
$1,408
This Air Canada deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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 8/174:40 pm
STL
- BNE
2 stops23h 25m
Multiple Airlines
Mon 8/248:40 pm
BNE
- STL
3 stops38h 44m
Multiple Airlines
Deal found 7/2![Multiple Airlines logo]()
$1,439
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1612:59 pm
STL
- MEL
2 stops28h 16m
United Airlines
Sun 8/239:30 am
MEL
- STL
2 stops25h 59m
United Airlines
Deal found 7/1![United Airlines logo]()
$1,203
This oojo deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 10/2012:47 pm
STL
- AVV
2 stops42h 03m
Multiple Airlines
Tue 11/34:25 pm
AVV
- STL
2 stops37h 12m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$1,463
This United Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” 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 7/277:23 pm
STL
- CBR
2 stops26h 52m
United Airlines
Mon 8/38:10 am
CBR
- STL
2 stops25h 07m
United Airlines
Deal found 6/30![United Airlines logo]()
$1,293
This oojo deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:22 pm
STL
- PER
2 stops32h 38m
Qantas Airways
Sat 8/812:25 pm
PER
- STL
2 stops47h 34m
Qantas Airways
Deal found 7/3![Qantas Airways logo]()
$1,760
This KAYAK deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 7/261:14 pm
STL
- CNS
3 stops34h 46m
Multiple Airlines
Sun 8/29:40 pm
CNS
- STL
2 stops41h 19m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$1,541
This Air Canada deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” 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 8/172:40 pm
STL
- PER
3 stops42h 00m
Air Canada
Mon 8/243:30 pm
PER
- STL
3 stops59h 32m
Air Canada
Deal found 6/30![Air Canada logo]()
$1,698
This United Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” 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 7/277:23 pm
STL
- CBR
2 stops26h 52m
United Airlines
Wed 8/58:10 am
CBR
- STL
2 stops25h 07m
United Airlines
Deal found 6/30![United Airlines logo]()
$1,293
This Air Canada deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 stops51h 55m
Multiple Airlines
Mon 8/318:40 pm
BNE
- STL
3 stops38h 42m
Multiple Airlines
Deal found 7/4![Multiple Airlines logo]()
$1,563
This United Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 7/5![United Airlines logo]()
$1,306
This Qantas Airways deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” 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 7/316:37 am
STL
- CBR
2 stops43h 03m
Qantas Airways
Tue 8/46:30 pm
CBR
- STL
2 stops43h 29m
Qantas Airways
Deal found 6/30![Qantas Airways logo]()
$1,935
This United deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:42 am
STL
- PER
2 stops38h 48m
Multiple Airlines
Mon 8/246:10 pm
PER
- STL
3 stops58h 28m
Multiple Airlines
Deal found 6/30![Multiple Airlines logo]()
$1,575
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/44:40 pm
STL
- SYD
2 stops23h 20m
United Airlines
Wed 9/1610:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 7/2![United Airlines logo]()
$1,356
This United Airlines deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/11:36 pm
STL
- SYD
2 stops26h 24m
United Airlines
Mon 10/1211:20 am
SYD
- STL
1 stop23h 23m
United Airlines
Deal found 7/4![United Airlines logo]()
$1,360
This Air Canada deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 8/22:40 pm
STL
- PER
3 stops35h 15m
Multiple Airlines
Sat 8/82:35 pm
PER
- STL
3 stops42h 49m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$2,059
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” 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 8/178:42 am
STL
- PER
2 stops38h 48m
United Airlines
Mon 8/243:30 pm
PER
- STL
3 stops61h 08m
United Airlines
Deal found 7/1![United Airlines logo]()
$1,604
This BusinessClass deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” 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 12/204:05 pm
STL
- PER
2 stops40h 50m
Cathay Pacific
Sat 1/28:30 am
PER
- STL
2 stops46h 13m
Cathay Pacific
Deal found 7/1![Cathay Pacific logo]()
$8,175
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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 12/51:08 pm
STL
- PER
3 stops32h 12m
United Airlines
Sat 12/123:15 pm
PER
- STL
2 stops40h 38m
United Airlines
Deal found 7/2![United Airlines logo]()
$1,757
This United Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:01 am
STL
- PER
3 stops43h 04m
United Airlines
Sat 8/84:45 pm
PER
- STL
2 stops38h 32m
United Airlines
Deal found 7/3![United Airlines logo]()
$1,761
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated July 5, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated July 5, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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 8/76:01 am
STL
- SYD
2 stops33h 54m
United Airlines
Sun 8/1610:20 am
SYD
- STL
1 stop22h 39m
United Airlines
Deal found 7/2![United Airlines logo]()
$1,236
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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.
Sat 8/85:00 pm
STL
- SYD
2 stops46h 50m
Delta
Tue 8/189:15 am
SYD
- STL
2 stops24h 40m
Delta
Deal found 7/2![Delta logo]()
$1,205
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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.
Sat 8/85:00 pm
STL
- SYD
2 stops46h 50m
Delta
Sun 8/169:15 am
SYD
- STL
2 stops54h 26m
Delta
Deal found 7/2![Delta logo]()
$1,221
This Bravofly deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:00 am
STL
- SYD
1 stop34h 30m
Qantas Airways
Mon 8/179:10 am
SYD
- STL
1 stop28h 49m
Qantas Airways
Deal found 6/30![Qantas Airways logo]()
$1,152
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:48 pm
STL
- SYD
2 stops23h 12m
United Airlines
Mon 8/1710:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 7/1![United Airlines logo]()
$1,186
This Delta deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” 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 8/103:39 pm
STL
- SYD
2 stops24h 11m
Delta
Mon 8/179:15 am
SYD
- STL
2 stops29h 11m
Delta
Deal found 7/1![Delta logo]()
$1,190
This American Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/106:00 am
STL
- SYD
1 stop34h 05m
American Airlines
Mon 8/179:10 am
SYD
- STL
2 stops23h 55m
American Airlines
Deal found 6/30![American Airlines logo]()
$1,196
This Kiwi.com deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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 8/116:00 am
STL
- SYD
1 stop34h 30m
Qantas Airways
Tue 8/189:10 am
SYD
- STL
1 stop28h 49m
Qantas Airways
Deal found 7/2![Qantas Airways logo]()
$1,231
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” 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 8/143:13 pm
STL
- MEL
2 stops25h 17m
United Airlines
Fri 8/2110:55 am
MEL
- STL
2 stops24h 51m
United Airlines
Deal found 7/1![United Airlines logo]()
$1,203
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/161:36 pm
STL
- MEL
2 stops27h 39m
United Airlines
Sun 8/2310:55 am
MEL
- STL
1 stop22h 04m
United Airlines
Deal found 7/1![United Airlines logo]()
$1,198
This oojo deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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 8/173:32 pm
STL
- SYD
1 stop24h 23m
Qantas Airways
Mon 8/2412:00 pm
SYD
- STL
1 stop21h 05m
Qantas Airways
Deal found 7/2![Qantas Airways logo]()
$1,146
This oojo deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:11 pm
STL
- SYD
1 stop22h 44m
Qantas Airways
Tue 9/85:50 pm
SYD
- STL
1 stop20h 09m
Qantas Airways
Deal found 7/3![Qantas Airways logo]()
$1,194
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 July 5, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated July 5, 2026.
This United Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:27 am
STL
- MEL
2 stops30h 48m
United Airlines
Deal found 7/3![United Airlines logo]()
$630
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:10 pm
STL
- AVV
3 stops58h 40m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$694
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:35 am
STL
- MEL
3 stops38h 00m
Multiple Airlines
Deal found 7/3![Multiple Airlines logo]()
$744
This American Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 7/197:22 pm
STL
- SYD
1 stop20h 33m
American Airlines
Deal found 7/5![American Airlines logo]()
$783
This BusinessClass deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” 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.
Fri 10/97:08 am
STL
- SYD
1 stop32h 47m
Air New Zealand
Deal found 7/1![Air New Zealand logo]()
$843
This KAYAK deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 7/196:37 am
STL
- SYD
1 stop33h 28m
Qantas Airways
Deal found 7/5![Qantas Airways logo]()
$881
This KAYAK deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” 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 10/910:12 am
STL
- SYD
2 stops28h 13m
Qantas Airways
Deal found 7/1![Qantas Airways logo]()
$955
This United Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 7/194:48 pm
STL
- SYD
2 stops47h 12m
United Airlines
Deal found 7/5![United Airlines logo]()
$1,053
This Kiwi.com deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 7/198:08 pm
STL
- SYD
3 stops49h 27m
Multiple Airlines
Deal found 7/5![Multiple Airlines logo]()
$1,101
This United Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” 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 7/174:48 pm
STL
- SYD
2 stops47h 12m
United Airlines
Deal found 7/5![United Airlines logo]()
$1,103
This Ovago deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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.
Wed 12/166:13 pm
STL
- MEL
2 stops35h 47m
Cathay Pacific
Deal found 7/3![Cathay Pacific logo]()
$1,311
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” 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 12/167:55 pm
STL
- MEL
2 stops44h 55m
Delta
Deal found 7/2![Delta logo]()
$1,416
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 July 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,146 (oojo) |
One-way from | $630 (United Airlines) |
Popular in | December |
Cheapest in | July |
Average price | $1,161 |
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 July 5, 2026.
Use the filters below to find and compare flights from St. Louis to Australia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 8/12
8:42 am-6:55 am
1 stop31h 13m
Sydney Kingsford Smith
Sun 8/30
10:20 am-5:59 pm
1 stop22h 39m
$1,186
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/27
7:05 pm-9:30 am
1 stop22h 25m
Melbourne
Wed 11/11
12:45 pm-10:10 pm
1 stop26h 25m
$1,199
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/20
1:29 pm-9:15 am
2 stops27h 46m
Melbourne
Tue 11/3
12:45 pm-8:34 pm
2 stops24h 49m
$1,203
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sun 8/16
12:59 pm-8:15 am
2 stops28h 16m
Melbourne
Sun 8/23
9:30 am-8:29 pm
2 stops25h 59m
$1,203
St. LouisCanberra
STL - CBR
STLCBR
Lambert-St Louis
Mon 7/27
7:23 pm-1:15 pm
2 stops26h 52m
Canberra
Mon 8/3
8:10 am-6:17 pm
2 stops25h 07m
$1,293
St. LouisCanberra
STL - CBR
STLCBR
Lambert-St Louis
Mon 7/27
7:23 pm-1:15 pm
2 stops26h 52m
Canberra
Wed 8/5
8:10 am-6:17 pm
2 stops25h 07m
$1,293
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 9/23
4:40 pm-7:00 am
2 stops23h 20m
Sydney Kingsford Smith
Wed 10/7
11:20 am-6:43 pm
1 stop23h 23m
$1,306
Quickest round-trip
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Fri 9/4
4:40 pm-7:00 am
2 stops23h 20m
Sydney Kingsford Smith
Wed 9/16
10:20 am-6:39 pm
1 stop23h 19m
$1,356
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Fri 9/4
6:30 am-6:50 am
2 stops33h 20m
Sydney Kingsford Smith
Wed 9/16
9:15 am-7:58 pm
2 stops25h 43m
$1,360
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Thu 10/1
10:29 am-6:50 am
2 stops29h 21m
Sydney Kingsford Smith
Mon 10/12
10:15 am-8:41 pm
2 stops26h 26m
$1,360
Showing 1-10 of 47 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Australia
Have a flexible travel schedule? Discover the best time to fly to Australia from St. Louis with our price prediction graph.
STL-SYD
STL-MEL
STL-BNE
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-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 July 5, 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
Crew
8.6
Comfort
8.1
Food
7.5
Boarding
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Crew
8.6
Comfort
8.1
Food
7.5
Boarding
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Crew
8.6
Comfort
8.1
Food
7.5
Boarding
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Crew
8.6
Comfort
8.1
Food
7.5
Boarding
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Crew
8.6
Comfort
8.1
Food
7.5
Boarding
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Crew
8.6
Comfort
8.1
Food
7.5
Boarding
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 July 5, 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 July 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$998 | Average$1,334 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,402 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,343 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,265 | Average$1,291 | FlexibilityNo cancel fee | On-time74% |