$516+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
May 11 — May 181
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 April 11, 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 11, 2026.
This Bravofly deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
Sat 5/166:11 pm
STL
- MEL
2 stops34h 09m
Multiple Airlines
Sat 8/157:30 am
MEL
- STL
2 stops29h 30m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$1,097
This Air Canada deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:10 pm
STL
- BNE
2 stops51h 55m
Air Canada
Mon 9/2810:00 am
BNE
- STL
2 stops25h 00m
Air Canada
Deal found 4/7![Air Canada logo]()
$1,154
This Air Canada deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 10/1312:10 pm
STL
- SYD
2 stops28h 10m
Air Canada
Wed 11/1811:20 am
SYD
- STL
2 stops45h 10m
Air Canada
Deal found 4/7![Air Canada logo]()
$1,156
This Justfly.com deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/135:10 am
STL
- SYD
2 stops35h 10m
Air Canada
Sun 7/199:20 am
SYD
- STL
2 stops43h 42m
Air Canada
Deal found 4/7![Air Canada logo]()
$1,167
This Air Canada deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:10 pm
STL
- BNE
2 stops51h 55m
Multiple Airlines
Mon 9/288:40 pm
BNE
- STL
3 stops38h 20m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$1,182
This Air Canada deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 5/267:05 am
STL
- MEL
3 stops37h 00m
Air Canada
Tue 6/26:00 am
MEL
- STL
3 stops45h 06m
Air Canada
Deal found 4/11![Air Canada logo]()
$1,200
This Air Canada deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/82:40 pm
STL
- MEL
3 stops29h 25m
Multiple Airlines
Tue 9/158:50 pm
MEL
- STL
3 stops38h 10m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$1,207
This Air Canada deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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 5/261:05 pm
STL
- BNE
2 stops51h 00m
Air Canada
Tue 6/210:15 am
BNE
- STL
2 stops25h 10m
Air Canada
Deal found 4/10![Air Canada logo]()
$1,215
This Priceline deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:05 am
STL
- MEL
3 stops37h 30m
Air Canada
Fri 7/316:00 am
MEL
- STL
3 stops47h 02m
Air Canada
Deal found 4/8![Air Canada logo]()
$1,217
This Justfly.com deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/271:20 pm
STL
- BNE
2 stops50h 45m
Air Canada
Sun 7/510:00 am
BNE
- STL
2 stops43h 02m
Air Canada
Deal found 4/10![Air Canada logo]()
$1,230
This FlightHub deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2912:10 pm
STL
- BNE
2 stops27h 55m
Air Canada
Mon 8/1010:00 am
BNE
- STL
2 stops45h 31m
Air Canada
Deal found 4/10![Air Canada logo]()
$1,240
This Justfly.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/235:10 am
STL
- SYD
2 stops35h 10m
Air Canada
Tue 9/19:20 am
SYD
- STL
2 stops42h 20m
Air Canada
Deal found 4/6![Air Canada logo]()
$1,252
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 11, 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 11, 2026.
This FlightHub deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/271:20 pm
STL
- BNE
2 stops50h 45m
Air Canada
Sun 7/510:00 am
BNE
- STL
2 stops43h 02m
Air Canada
Deal found 4/11![Air Canada logo]()
$1,230
This Air Canada deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/82:40 pm
STL
- AVV
3 stops34h 25m
Multiple Airlines
Tue 9/158:55 pm
AVV
- STL
3 stops56h 05m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$1,350
This Qantas Airways deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:21 am
STL
- BNE
1 stop31h 39m
Qantas Airways
Wed 8/127:40 am
BNE
- STL
2 stops25h 34m
Qantas Airways
Deal found 4/9![Qantas Airways logo]()
$1,428
This United Airlines deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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 5/147:06 pm
STL
- MEL
1 stop22h 09m
United Airlines
Wed 8/1210:55 am
MEL
- STL
1 stop22h 29m
United Airlines
Deal found 4/9![United Airlines logo]()
$1,479
This Delta deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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 5/1511:25 am
STL
- SYD
2 stops28h 25m
Delta
Sat 8/159:15 am
SYD
- STL
2 stops22h 30m
Delta
Deal found 4/9![Delta logo]()
$1,591
This oojo deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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 8/186:02 am
STL
- PER
2 stops47h 33m
Qatar Airways
Sun 9/2010:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 4/8![Qatar Airways logo]()
$1,610
This KAYAK deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
Thu 9/176:14 am
STL
- CNS
2 stops37h 31m
Air New Zealand
Mon 9/286:20 pm
CNS
- STL
3 stops37h 15m
Air New Zealand
Deal found 4/7![Air New Zealand logo]()
$1,913
This FlightHub deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2912:10 pm
STL
- BNE
2 stops27h 55m
Air Canada
Mon 8/1010:00 am
BNE
- STL
2 stops49h 39m
Air Canada
Deal found 4/7![Air Canada logo]()
$1,249
This Air Canada deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 9/78:55 am
STL
- AVV
3 stops38h 15m
Multiple Airlines
Fri 9/188:55 pm
AVV
- STL
3 stops38h 05m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$1,371
This Air Canada deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 5/41:05 pm
STL
- SYD
3 stops51h 15m
Air Canada
Mon 5/189:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 4/7![Air Canada logo]()
$1,271
This United Airlines deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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 5/187:06 pm
STL
- MEL
1 stop22h 09m
United Airlines
Sun 8/910:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 4/8![United Airlines logo]()
$1,479
This oojo deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 7/15:18 pm
STL
- BNE
2 stops25h 02m
Qantas Airways
Sat 7/117:40 am
BNE
- STL
2 stops24h 18m
Qantas Airways
Deal found 4/7![Qantas Airways logo]()
$1,550
This Air Canada deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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 5/267:05 am
STL
- BNE
3 stops37h 25m
Air Canada
Tue 6/28:45 pm
BNE
- STL
3 stops54h 21m
Air Canada
Deal found 4/10![Air Canada logo]()
$1,283
This United Airlines deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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 5/191:24 pm
STL
- MEL
2 stops27h 51m
United Airlines
Sun 8/1610:55 am
MEL
- STL
1 stop22h 29m
United Airlines
Deal found 4/9![United Airlines logo]()
$1,484
This Qatar Airways deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
Mon 8/176:02 am
STL
- PER
2 stops47h 33m
Qatar Airways
Mon 9/2110:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 4/7![Qatar Airways logo]()
$1,667
This Air Canada deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/52:40 pm
STL
- MEL
3 stops29h 45m
Multiple Airlines
Sun 9/138:45 pm
MEL
- STL
3 stops56h 15m
Multiple Airlines
Deal found 4/6![Multiple Airlines logo]()
$1,558
This Qantas Airways deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
Thu 5/146:21 am
STL
- SYD
1 stop33h 44m
Qantas Airways
Tue 8/185:50 pm
SYD
- STL
1 stop20h 18m
Qantas Airways
Deal found 4/9![Qantas Airways logo]()
$1,600
This United Airlines deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 5/37:06 pm
STL
- SYD
1 stop20h 49m
United Airlines
Sun 5/1010:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 4/11![United Airlines logo]()
$1,488
This Qatar Airways deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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.
Mon 8/176:02 am
STL
- PER
2 stops47h 33m
Qatar Airways
Sun 9/2010:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 4/7![Qatar Airways logo]()
$1,707
This oojo deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 9/53:33 pm
STL
- MEL
1 stop22h 27m
Qantas Airways
Sun 9/136:00 am
MEL
- STL
2 stops25h 42m
Qantas Airways
Deal found 4/6![Qantas Airways logo]()
$1,610
This United Airlines deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 5/264:48 pm
STL
- SYD
2 stops23h 12m
United Airlines
Tue 6/210:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 4/11![United Airlines logo]()
$1,488
This Expedia deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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.
Wed 5/136:21 am
STL
- AVV
2 stops49h 29m
Multiple Airlines
Wed 5/206:00 am
AVV
- STL
2 stops32h 59m
Multiple Airlines
Deal found 4/11![Multiple Airlines logo]()
$1,704
This United Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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 5/117:06 pm
STL
- SYD
1 stop20h 49m
United Airlines
Mon 5/1810:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 4/10![United Airlines logo]()
$1,488
This BusinessClass deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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.
Wed 4/294:49 pm
STL
- CNS
3 stops38h 56m
Air New Zealand
Thu 5/145:40 pm
CNS
- STL
3 stops43h 50m
Air New Zealand
Deal found 4/8![Air New Zealand logo]()
$2,198
This Qantas Airways deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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 5/136:21 am
STL
- MEL
2 stops38h 19m
Qantas Airways
Sat 8/159:45 am
MEL
- STL
1 stop28h 23m
Qantas Airways
Deal found 4/9![Qantas Airways logo]()
$1,672
This United Airlines deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 4/11![United Airlines logo]()
$1,488
This BusinessClass deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 5/226:35 am
STL
- AVV
2 stops49h 15m
Multiple Airlines
Fri 5/294:40 pm
AVV
- STL
2 stops40h 50m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$1,841
This FlightHub deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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.
Fri 5/14:30 pm
STL
- PER
2 stops30h 45m
Qatar Airways
Thu 5/710:55 pm
PER
- STL
2 stops36h 24m
Qatar Airways
Deal found 4/8![Qatar Airways logo]()
$2,029
This United Airlines deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 5/267:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Mon 6/2910:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 4/6![United Airlines logo]()
$1,539
This Expedia deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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.
Fri 5/226:35 am
STL
- AVV
2 stops42h 30m
Multiple Airlines
Fri 7/318:55 pm
AVV
- STL
2 stops36h 39m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$1,886
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated April 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated April 11, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 5/41:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Mon 5/189:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 4/7![Air Canada logo]()
$1,263
This CheapOair deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:21 am
STL
- SYD
2 stops45h 49m
Qantas Airways
Tue 5/1212:00 pm
SYD
- STL
1 stop20h 21m
Qantas Airways
Deal found 4/7![Qantas Airways logo]()
$1,443
This Air Canada deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 5/101:05 pm
STL
- SYD
2 stops51h 15m
Air Canada
Wed 5/209:20 am
SYD
- STL
2 stops41h 46m
Air Canada
Deal found 4/11![Air Canada logo]()
$1,439
This oojo deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 5/136:21 am
STL
- SYD
2 stops36h 14m
Qantas Airways
Wed 5/2012:00 pm
SYD
- STL
1 stop20h 21m
Qantas Airways
Deal found 4/11![Qantas Airways logo]()
$1,397
This Kiwi.com deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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
- MEL
2 stops29h 27m
Multiple Airlines
Tue 8/119:45 am
MEL
- STL
1 stop28h 23m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$1,438
This Bravofly deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
Sat 5/166:11 pm
STL
- MEL
2 stops34h 09m
Multiple Airlines
Sat 8/157:30 am
MEL
- STL
2 stops29h 30m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$1,097
This Qantas Airways deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:21 am
STL
- BNE
1 stop31h 39m
Qantas Airways
Wed 8/127:40 am
BNE
- STL
2 stops25h 34m
Qantas Airways
Deal found 4/9![Qantas Airways logo]()
$1,428
This Air Canada deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 5/207:05 am
STL
- SYD
2 stops33h 15m
Air Canada
Wed 5/279:20 am
SYD
- STL
2 stops41h 46m
Air Canada
Deal found 4/7![Air Canada logo]()
$1,273
This Priceline deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:05 am
STL
- MEL
3 stops37h 30m
Air Canada
Fri 7/316:00 am
MEL
- STL
3 stops47h 02m
Air Canada
Deal found 4/8![Air Canada logo]()
$1,217
This BusinessClass deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 5/247:05 am
STL
- SYD
1 stop33h 15m
Singapore Airlines
Sat 6/69:20 am
SYD
- STL
1 stop41h 46m
Singapore Airlines
Deal found 4/6![Singapore Airlines logo]()
$1,313
This Air Canada deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” 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 5/267:05 am
STL
- MEL
3 stops37h 00m
Air Canada
Tue 6/26:00 am
MEL
- STL
3 stops45h 06m
Air Canada
Deal found 4/11![Air Canada logo]()
$1,200
This Air Canada deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” 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 5/261:05 pm
STL
- BNE
2 stops51h 00m
Air Canada
Tue 6/210:15 am
BNE
- STL
2 stops25h 10m
Air Canada
Deal found 4/10![Air Canada logo]()
$1,215
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 11, 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 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 5/56:51 pm
STL
- SYD
3 stops49h 59m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$516
This Kiwi.com deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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
- SYD
3 stops47h 32m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$523
This Kiwi.com deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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
- SYD
2 stops29h 17m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$527
This Kiwi.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 5/1412:36 pm
STL
- MEL
3 stops56h 29m
Multiple Airlines
Deal found 4/6![Multiple Airlines logo]()
$550
This Kiwi.com deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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 5/136:51 pm
STL
- SYD
3 stops49h 59m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$572
This Jetabroad deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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.
Sat 5/166:11 pm
STL
- MEL
2 stops34h 09m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$575
This Kiwi.com deal was found by Cheapflights users on 4/8. Clicking the “Pick Dates” 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 5/229:06 pm
STL
- MEL
3 stops47h 54m
Multiple Airlines
Deal found 4/8![Multiple Airlines logo]()
$577
This Kiwi.com deal was found by Cheapflights users on 4/9. Clicking the “Pick Dates” 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
- SYD
3 stops48h 42m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$587
This Kiwi.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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
- AVV
3 stops51h 12m
Multiple Airlines
Deal found 4/6![Multiple Airlines logo]()
$597
This Kiwi.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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 5/136:51 pm
STL
- MEL
3 stops50h 09m
Multiple Airlines
Deal found 4/6![Multiple Airlines logo]()
$599
This Kiwi.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” 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
- MEL
3 stops47h 42m
Multiple Airlines
Deal found 4/6![Multiple Airlines logo]()
$657
This Air Canada deal was found by Cheapflights users on 4/7. Clicking the “Pick Dates” 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 5/51:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Deal found 4/7![Air Canada logo]()
$728
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 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,097 (Bravofly) |
One-way from | $516 (Kiwi.com) |
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 11, 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. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Sat 6/27
1:20 pm-7:05 am
2 stops50h 45m
Brisbane
Sun 7/5
10:00 am-2:02 pm
2 stops43h 02m
$1,230
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Wed 7/29
12:10 pm-7:05 am
2 stops27h 55m
Brisbane
Mon 8/10
10:00 am-8:39 pm
2 stops49h 39m
$1,249
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
1:05 pm-7:20 am
3 stops51h 15m
Sydney Kingsford Smith
Mon 5/18
9:20 am-8:25 pm
2 stops26h 05m
$1,271
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Tue 5/26
7:05 am-11:30 am
3 stops37h 25m
Brisbane
Tue 6/2
8:45 pm-12:06 pm
3 stops54h 21m
$1,283
St. LouisMelbourne
STL - AVV
STLAVV
Lambert-St Louis
Tue 9/8
2:40 pm-4:05 pm
3 stops34h 25m
Melbourne Avalon
Tue 9/15
8:55 pm-2:00 pm
3 stops56h 05m
$1,350
St. LouisMelbourne
STL - AVV
STLAVV
Lambert-St Louis
Mon 9/7
8:55 am-2:10 pm
3 stops38h 15m
Melbourne Avalon
Fri 9/18
8:55 pm-8:00 pm
3 stops38h 05m
$1,371
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Tue 5/19
6:21 am-5:00 am
1 stop31h 39m
Brisbane
Wed 8/12
7:40 am-6:14 pm
2 stops25h 34m
$1,428
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Thu 5/14
7:06 pm-8:15 am
1 stop22h 09m
Melbourne
Wed 8/12
10:55 am-6:24 pm
1 stop22h 29m
$1,479
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Mon 5/18
7:06 pm-8:15 am
1 stop22h 09m
Melbourne
Sun 8/9
10:55 am-6:17 pm
1 stop22h 22m
$1,479
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 5/19
1:24 pm-8:15 am
2 stops27h 51m
Melbourne
Sun 8/16
10:55 am-6:24 pm
1 stop22h 29m
$1,484
Showing 1-10 of 60 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-PER
STL-AVV
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-PER
What is the cheapest month to book a flight from St. Louis to Australia?
Currently, August is the cheapest month in which you can book a flight from St. Louis to Australia (average of $645). 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 11, 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
Overall
8.1
Comfort
8.1
Boarding
8.2
Food
7.5
Entertainment
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Crew
8.6
Overall
8.1
Comfort
8.1
Boarding
8.2
Food
7.5
Entertainment
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Crew
8.6
Overall
8.1
Comfort
8.1
Boarding
8.2
Food
7.5
Entertainment
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Crew
8.6
Overall
8.1
Comfort
8.1
Boarding
8.2
Food
7.5
Entertainment
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Crew
8.6
Overall
8.1
Comfort
8.1
Boarding
8.2
Food
7.5
Entertainment
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Crew
8.6
Overall
8.1
Comfort
8.1
Boarding
8.2
Food
7.5
Entertainment
7.5
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 11, 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 11, 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$1,307 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,430 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,365 | FlexibilityNo cancel fee | On-time71% |