$647+ 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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Sep 2 — Sep 91
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Australia with Cheapflights
1. Tell us where you want to go
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 August 3, 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 August 3, 2026.
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Tue 10/275:40 am
STL
- MEL
1 stop31h 20m
American Airlines
Wed 11/1110:45 pm
MEL
- STL
2 stops26h 22m
American Airlines
Deal found 7/30![American Airlines logo]()
$1,193
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Tue 10/2011:31 am
STL
- MEL
2 stops27h 14m
American Airlines
Tue 11/310:45 pm
MEL
- STL
2 stops27h 45m
American Airlines
Deal found 7/30![American Airlines logo]()
$1,194
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/25:13 pm
STL
- SYD
1 stop22h 42m
American Airlines
Sun 8/169:10 am
SYD
- STL
2 stops23h 55m
American Airlines
Deal found 7/31![American Airlines logo]()
$1,223
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/32:46 pm
STL
- SYD
2 stops25h 44m
American Airlines
Mon 8/109:10 am
SYD
- STL
2 stops25h 17m
American Airlines
Deal found 7/31![American Airlines logo]()
$1,227
This oojo deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:37 am
STL
- SYD
1 stop33h 53m
Qantas Airways
Mon 8/109:10 am
SYD
- STL
1 stop28h 49m
Qantas Airways
Deal found 7/29![Qantas Airways logo]()
$1,228
This United Airlines deal was found by Cheapflights users on 8/1. 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 8/318:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Mon 9/710:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 8/1![United Airlines logo]()
$1,237
This American Airlines deal was found by Cheapflights users on 8/2. 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.
Wed 9/166:30 am
STL
- MEL
1 stop33h 15m
American Airlines
Wed 9/231:35 pm
MEL
- STL
1 stop25h 08m
American Airlines
Deal found 8/2![American Airlines logo]()
$1,249
This United Airlines deal was found by Cheapflights users on 8/2. 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.
Sun 10/257:05 pm
STL
- MEL
1 stop22h 25m
United Airlines
Sun 11/812:45 pm
MEL
- STL
1 stop26h 30m
United Airlines
Deal found 8/2![United Airlines logo]()
$1,262
This oojo deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/243:20 pm
STL
- BNE
1 stop24h 10m
Qantas Airways
Sat 10/319:45 am
BNE
- STL
1 stop19h 45m
Qantas Airways
Deal found 7/31![Qantas Airways logo]()
$1,264
This United Airlines deal was found by Cheapflights users on 8/2. 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 10/281:40 pm
STL
- MEL
2 stops26h 50m
United Airlines
Sun 11/811:30 am
MEL
- STL
2 stops23h 35m
United Airlines
Deal found 8/2![United Airlines logo]()
$1,266
This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/253:20 pm
STL
- BNE
2 stops26h 00m
Qantas Airways
Wed 11/189:40 am
BNE
- STL
1 stop24h 35m
Qantas Airways
Deal found 7/30![Qantas Airways logo]()
$1,268
This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:00 am
STL
- SYD
1 stop34h 05m
Qantas Airways
Mon 8/179:10 am
SYD
- STL
1 stop28h 49m
Qantas Airways
Deal found 7/30![Qantas Airways logo]()
$1,269
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 August 3, 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 August 3, 2026.
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/208:48 am
STL
- MEL
2 stops29h 57m
American Airlines
Tue 11/312:00 pm
MEL
- STL
1 stop28h 33m
American Airlines
Deal found 7/31![American Airlines logo]()
$1,193
This United Airlines deal was found by Cheapflights users on 8/1. 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 8/313:13 pm
STL
- SYD
2 stops24h 42m
United Airlines
Mon 9/710:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 8/1![United Airlines logo]()
$1,237
This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/253:20 pm
STL
- BNE
2 stops26h 00m
Qantas Airways
Wed 11/189:40 am
BNE
- STL
1 stop24h 35m
Qantas Airways
Deal found 7/30![Qantas Airways logo]()
$1,268
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/72:32 pm
STL
- SYD
2 stops25h 18m
Delta
Sun 9/279:15 am
SYD
- STL
2 stops29h 27m
Delta
Deal found 7/30![Delta logo]()
$1,312
This Air Canada deal was found by Cheapflights users on 7/30. 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.
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 7/30![Multiple Airlines logo]()
$1,446
This Qatar Airways deal was found by Cheapflights users on 8/2. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2511:31 am
STL
- MEL
2 stops43h 49m
Qatar Airways
Thu 11/1211:40 pm
MEL
- STL
2 stops35h 37m
Qatar Airways
Deal found 8/2![Qatar Airways logo]()
$1,462
This Air Canada deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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
- MEL
3 stops30h 25m
Air Canada
Tue 11/38:00 am
MEL
- STL
3 stops48h 26m
Air Canada
Deal found 7/31![Air Canada logo]()
$1,462
This Cathay Pacific deal was found by Cheapflights users on 7/30. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:04 am
STL
- PER
2 stops51h 51m
Cathay Pacific
Sat 10/3112:25 am
PER
- STL
2 stops33h 54m
Cathay Pacific
Deal found 7/30![Cathay Pacific logo]()
$1,734
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/2710:22 am
STL
- MEL
2 stops26h 38m
American Airlines
Wed 11/1110:45 pm
MEL
- STL
2 stops27h 45m
American Airlines
Deal found 7/31![American Airlines logo]()
$1,193
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/242:56 pm
STL
- BNE
2 stops24h 34m
United Airlines
Sat 10/3110:40 am
BNE
- STL
2 stops21h 17m
United Airlines
Deal found 7/31![United Airlines logo]()
$1,300
This Rumbo deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:00 am
STL
- MEL
1 stop33h 45m
Qantas Airways
Tue 8/189:45 am
MEL
- STL
1 stop28h 14m
Qantas Airways
Deal found 7/29![Qantas Airways logo]()
$1,307
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1310:31 am
STL
- SYD
2 stops29h 19m
Delta
Wed 11/1810:40 am
SYD
- STL
2 stops27h 11m
Delta
Deal found 7/29![Delta logo]()
$1,312
This United Airlines deal was found by Cheapflights users on 8/2. 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.
Thu 10/297:05 pm
STL
- MEL
1 stop22h 25m
United Airlines
Tue 11/1012:45 pm
MEL
- STL
1 stop22h 20m
United Airlines
Deal found 8/2![United Airlines logo]()
$1,312
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:30 pm
STL
- SYD
2 stops25h 20m
Delta
Wed 10/710:15 am
SYD
- STL
2 stops29h 39m
Delta
Deal found 7/30![Delta logo]()
$1,312
This United deal was found by Cheapflights users on 8/2. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/208:36 am
STL
- CBR
2 stops46h 29m
Multiple Airlines
Sun 9/277:15 am
CBR
- STL
2 stops26h 28m
Multiple Airlines
Deal found 8/2![Multiple Airlines logo]()
$1,480
This Qatar Airways deal was found by Cheapflights users on 8/2. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/251:06 pm
STL
- MEL
2 stops42h 14m
Qatar Airways
Sat 11/1411:40 pm
MEL
- STL
2 stops36h 42m
Qatar Airways
Deal found 8/2![Qatar Airways logo]()
$1,502
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/131:36 pm
STL
- SYD
2 stops26h 24m
United Airlines
Wed 11/189:15 am
SYD
- STL
1 stop21h 58m
United Airlines
Deal found 7/29![United Airlines logo]()
$1,312
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/255:35 pm
STL
- BNE
2 stops46h 55m
Delta
Wed 11/1810:40 am
BNE
- STL
2 stops26h 11m
Delta
Deal found 7/30![Delta logo]()
$1,316
This Air Canada deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:40 pm
STL
- AVV
3 stops33h 25m
Multiple Airlines
Tue 11/36:00 am
AVV
- STL
3 stops50h 26m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$1,537
This Air Canada deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:05 pm
STL
- CBR
3 stops51h 30m
Air Canada
Sun 11/13:20 pm
CBR
- STL
3 stops65h 06m
Air Canada
Deal found 7/31![Air Canada logo]()
$1,729
This United Airlines deal was found by Cheapflights users on 8/2. 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.
Sun 10/251:08 pm
STL
- BNE
3 stops33h 22m
United Airlines
Wed 11/1811:40 am
BNE
- STL
2 stops21h 17m
United Airlines
Deal found 8/2![United Airlines logo]()
$1,323
This Delta deal was found by Cheapflights users on 8/1. 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 9/76:20 am
STL
- SYD
2 stops33h 30m
Delta
Mon 9/149:15 am
SYD
- STL
2 stops29h 01m
Delta
Deal found 8/1![Delta logo]()
$1,332
This Qantas Airways deal was found by Cheapflights users on 8/1. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:10 pm
STL
- CBR
2 stops28h 55m
Qantas Airways
Sun 11/17:45 pm
CBR
- STL
2 stops45h 00m
Qantas Airways
Deal found 8/1![Qantas Airways logo]()
$1,680
This BusinessClass deal was found by Cheapflights users on 8/2. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/611:10 am
STL
- HBA
3 stops38h 05m
Air New Zealand
Sun 8/911:30 am
HBA
- STL
3 stops50h 15m
Air New Zealand
Deal found 8/2![Air New Zealand logo]()
$3,831
This United Airlines deal was found by Cheapflights users on 8/3. 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.
Thu 10/157:08 am
STL
- BNE
2 stops38h 12m
United Airlines
Wed 10/2110:30 am
BNE
- STL
1 stop23h 13m
United Airlines
Deal found 8/3![United Airlines logo]()
$1,328
This Expedia deal was found by Cheapflights users on 7/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:00 pm
STL
- AVV
2 stops36h 20m
Multiple Airlines
Tue 9/296:00 am
AVV
- STL
2 stops25h 40m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$1,626
This Delta deal was found by Cheapflights users on 8/1. 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.
Fri 9/1110:29 am
STL
- MEL
2 stops30h 21m
Delta
Fri 9/1810:00 am
MEL
- STL
2 stops22h 37m
Delta
Deal found 8/1![Delta logo]()
$1,362
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/288:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Fri 9/410:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 7/31![United Airlines logo]()
$1,336
This Qantas Airways deal was found by Cheapflights users on 8/1. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:20 pm
STL
- PER
2 stops33h 40m
Qantas Airways
Sun 11/110:20 am
PER
- STL
2 stops51h 25m
Qantas Airways
Deal found 8/1![Qantas Airways logo]()
$1,803
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:40 am
STL
- SYD
2 stops33h 10m
Delta
Wed 10/710:15 am
SYD
- STL
2 stops24h 00m
Delta
Deal found 7/30![Delta logo]()
$1,362
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated August 3, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated August 3, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 8/32:46 pm
STL
- SYD
2 stops25h 44m
American Airlines
Mon 8/109:10 am
SYD
- STL
2 stops25h 17m
American Airlines
Deal found 7/31![American Airlines logo]()
$1,227
This oojo deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/36:37 am
STL
- SYD
1 stop33h 53m
Qantas Airways
Mon 8/109:10 am
SYD
- STL
1 stop28h 49m
Qantas Airways
Deal found 7/29![Qantas Airways logo]()
$1,228
This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:00 am
STL
- SYD
1 stop34h 05m
Qantas Airways
Mon 8/179:10 am
SYD
- STL
1 stop28h 49m
Qantas Airways
Deal found 7/30![Qantas Airways logo]()
$1,269
This American Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/712:45 pm
STL
- SYD
2 stops26h 40m
American Airlines
Mon 8/179:10 am
SYD
- STL
2 stops26h 16m
American Airlines
Deal found 7/29![American Airlines logo]()
$1,278
This Rumbo deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:00 am
STL
- MEL
1 stop33h 45m
Qantas Airways
Tue 8/189:45 am
MEL
- STL
1 stop28h 14m
Qantas Airways
Deal found 7/29![Qantas Airways logo]()
$1,307
This United Airlines deal was found by Cheapflights users on 8/1. 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 8/313:13 pm
STL
- SYD
2 stops24h 42m
United Airlines
Mon 9/710:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 8/1![United Airlines logo]()
$1,237
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/72:32 pm
STL
- SYD
2 stops25h 18m
Delta
Sun 9/279:15 am
SYD
- STL
2 stops29h 27m
Delta
Deal found 7/30![Delta logo]()
$1,312
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Fri 9/1112:46 pm
STL
- MEL
2 stops26h 59m
American Airlines
Fri 9/189:00 am
MEL
- STL
2 stops24h 04m
American Airlines
Deal found 7/30![American Airlines logo]()
$1,323
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/111:36 pm
STL
- MEL
2 stops26h 54m
United Airlines
Fri 9/1810:55 am
MEL
- STL
1 stop22h 43m
United Airlines
Deal found 8/1![United Airlines logo]()
$1,362
This American Airlines deal was found by Cheapflights users on 8/2. 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.
Wed 9/1612:46 pm
STL
- MEL
2 stops26h 59m
American Airlines
Wed 9/231:35 pm
MEL
- STL
1 stop25h 08m
American Airlines
Deal found 8/2![American Airlines logo]()
$1,244
This Delta deal was found by Cheapflights users on 8/2. 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 9/162:30 pm
STL
- MEL
2 stops26h 20m
Delta
Wed 9/2310:00 am
MEL
- STL
2 stops28h 16m
Delta
Deal found 8/2![Delta logo]()
$1,262
This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:34 pm
STL
- SYD
1 stop24h 21m
Qantas Airways
Wed 10/76:50 pm
SYD
- STL
1 stop20h 56m
Qantas Airways
Deal found 7/30![Qantas Airways logo]()
$1,293
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 August 3, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated August 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:10 pm
STL
- SYD
3 stops55h 05m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$647
This American Airlines deal was found by Cheapflights users on 8/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/12:54 pm
STL
- SYD
2 stops25h 06m
American Airlines
Deal found 8/1![American Airlines logo]()
$705
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:10 pm
STL
- SYD
2 stops45h 20m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$785
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Thu 8/67:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Deal found 7/30![United Airlines logo]()
$837
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 12/161:20 pm
STL
- MEL
2 stops28h 15m
American Airlines
Deal found 7/31![American Airlines logo]()
$1,250
This KAYAK deal was found by Cheapflights users on 7/30. 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 12/166:55 am
STL
- MEL
2 stops34h 40m
Qantas Airways
Deal found 7/30![Qantas Airways logo]()
$1,389
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 12/161:08 pm
STL
- MEL
3 stops51h 22m
United Airlines
Deal found 7/31![United Airlines logo]()
$1,452
This Air New Zealand deal was found by Cheapflights users on 7/30. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/169:13 am
STL
- MEL
3 stops35h 32m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$1,618
This oojo deal was found by Cheapflights users on 7/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/161:20 pm
STL
- AVV
2 stops33h 30m
Qantas Airways
Deal found 7/30![Qantas Airways logo]()
$2,142
This Air Canada deal was found by Cheapflights users on 8/1. 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.
Wed 12/164:05 pm
STL
- AVV
3 stops59h 15m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$3,630
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/16:04 am
STL
- BNE
3 stops35h 06m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$4,285
This Air Canada deal was found by Cheapflights users on 7/30. 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 10/191:36 pm
STL
- SYD
2 stops26h 44m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$4,758
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 August 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,193 (American Airlines) |
One-way from | $647 (Kiwi.com) |
Popular in | December |
Cheapest in | July |
Average price | $1,345 |
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 August 3, 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
8:48 am-6:45 am
2 stops29h 57m
Melbourne
Tue 11/3
12:00 pm-11:33 pm
1 stop28h 33m
$1,193
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/27
10:22 am-5:00 am
2 stops26h 38m
Melbourne
Wed 11/11
10:45 pm-9:30 am
2 stops27h 45m
$1,193
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 8/31
3:13 pm-6:55 am
2 stops24h 42m
Sydney Kingsford Smith
Mon 9/7
10:20 am-6:39 pm
1 stop23h 19m
$1,237
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Sun 10/25
3:20 pm-8:20 am
2 stops26h 00m
Brisbane
Wed 11/18
9:40 am-6:15 pm
1 stop24h 35m
$1,268
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Sat 10/24
2:56 pm-6:30 am
2 stops24h 34m
Brisbane
Sat 10/31
10:40 am-4:57 pm
2 stops21h 17m
$1,300
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Fri 8/14
6:00 am-6:45 am
1 stop33h 45m
Melbourne
Tue 8/18
9:45 am-10:59 pm
1 stop28h 14m
$1,307
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 9/7
2:32 pm-6:50 am
2 stops25h 18m
Sydney Kingsford Smith
Sun 9/27
9:15 am-11:42 pm
2 stops29h 27m
$1,312
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Tue 10/13
10:31 am-7:50 am
2 stops29h 19m
Sydney Kingsford Smith
Wed 11/18
10:40 am-8:51 pm
2 stops27h 11m
$1,312
Quickest round-trip
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Thu 10/29
7:05 pm-9:30 am
1 stop22h 25m
Melbourne
Tue 11/10
12:45 pm-6:05 pm
1 stop22h 20m
$1,312
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 9/23
2:30 pm-6:50 am
2 stops25h 20m
Sydney Kingsford Smith
Wed 10/7
10:15 am-11:54 pm
2 stops29h 39m
$1,312
Showing 1-10 of 42 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Australia
Have a flexible travel schedule? Discover the best time to fly to Australia from St. Louis with our price prediction graph.
STL-SYD
STL-MEL
STL-AVV
STL-BNE
STL-PER
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Australia
STL-AU0
STL-SYD
STL-MEL
STL-AVV
STL-BNE
What is the cheapest month to book a flight from St. Louis to Australia?
Currently, May is the cheapest month in which you can book a flight from St. Louis to Australia (average of $992). Flying from St. Louis to Australia in August is currently the most expensive (average of $1,554). 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 August 3, 2026.
Read reviews from past customers who have flown Qantas Airways,United Airlines, andAmerican 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.
Boarding
7.7
Entertainment
7.2
Crew
8.1
Food
7.0
Comfort
7.4
Overall
7.5
Reviews
1 / 20
2.0
MediocreMidhat,Apr 2026
AKL - ADL
Boarding
7.7
Entertainment
7.2
Crew
8.1
Food
7.0
Comfort
7.4
Overall
7.5
Reviews
1 / 20
2.0
MediocreMidhat,Apr 2026
AKL - ADL
Boarding
7.7
Entertainment
7.2
Crew
8.1
Food
7.0
Comfort
7.4
Overall
7.5
Reviews
1 / 20
2.0
MediocreMidhat,Apr 2026
AKL - ADL
Boarding
7.7
Entertainment
7.2
Crew
8.1
Food
7.0
Comfort
7.4
Overall
7.5
Reviews
1 / 20
2.0
MediocreMidhat,Apr 2026
AKL - ADL
Boarding
7.7
Entertainment
7.2
Crew
8.1
Food
7.0
Comfort
7.4
Overall
7.5
Reviews
1 / 20
2.0
MediocreMidhat,Apr 2026
AKL - ADL
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 August 3, 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 4 airlines flying from St. Louis to Australia
Discover the top 4 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 August 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$857 | Average$1,404 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,029 | Average$1,372 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,361 | FlexibilityNo cancel fee | On-time71% |