$503+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Mar 26 — Apr 21
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Australia
Cheapest
Best
Last-minute
One-way
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 February 24, 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 February 24, 2026.
This Air Canada deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:15 pm
STL
- SYD
2 stops48h 20m
Air Canada
Tue 11/311:20 am
SYD
- STL
2 stops45h 10m
Air Canada
Deal found 2/20![Air Canada logo]()
$1,011
This BusinessClass deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:15 pm
STL
- SYD
1 stop48h 20m
Multiple Airlines
Tue 11/311:20 am
SYD
- STL
1 stop45h 10m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$1,024
This Air Canada deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 5/231:00 pm
STL
- BNE
2 stops51h 05m
Air Canada
Tue 6/910:00 am
BNE
- STL
2 stops25h 05m
Air Canada
Deal found 2/22![Air Canada logo]()
$1,060
This Air Canada deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 5/231:00 pm
STL
- BNE
2 stops51h 05m
Air Canada
Mon 6/810:00 am
BNE
- STL
2 stops41h 06m
Air Canada
Deal found 2/22![Air Canada logo]()
$1,065
This Travelocity deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:00 pm
STL
- SYD
2 stops46h 35m
Air Canada
Wed 3/411:20 am
SYD
- STL
2 stops42h 59m
Air Canada
Deal found 2/20![Air Canada logo]()
$1,073
This oojo deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/211:46 am
STL
- MEL
1 stop24h 14m
Qantas Airways
Thu 3/124:55 pm
MEL
- STL
2 stops23h 03m
Qantas Airways
Deal found 2/23![Qantas Airways logo]()
$1,089
This United Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/256:00 am
STL
- BNE
2 stops57h 30m
United Airlines
Sun 7/510:30 am
BNE
- STL
2 stops37h 11m
United Airlines
Deal found 2/24![United Airlines logo]()
$1,097
This oojo deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 5/46:21 am
STL
- SYD
2 stops38h 34m
Qantas Airways
Mon 5/1812:00 pm
SYD
- STL
1 stop22h 30m
Qantas Airways
Deal found 2/24![Qantas Airways logo]()
$1,097
This lastminute.com deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:21 am
STL
- SYD
2 stops35h 59m
Qantas Airways
Thu 4/1612:00 pm
SYD
- STL
1 stop20h 21m
Qantas Airways
Deal found 2/23![Qantas Airways logo]()
$1,098
This Air Canada deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 4/84:05 pm
STL
- BNE
3 stops53h 00m
Multiple Airlines
Wed 4/1510:00 am
BNE
- STL
2 stops21h 56m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$1,100
This oojo deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/244:13 pm
STL
- SYD
1 stop21h 42m
Qantas Airways
Tue 3/35:00 pm
SYD
- STL
2 stops23h 59m
Qantas Airways
Deal found 2/21![Qantas Airways logo]()
$1,102
This oojo deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/293:30 pm
STL
- SYD
2 stops26h 25m
Qantas Airways
Sat 1/162:05 pm
SYD
- STL
1 stop19h 09m
Qantas Airways
Deal found 2/20![Qantas Airways logo]()
$1,104
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 February 24, 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 February 24, 2026.
This Qantas Airways deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/257:20 pm
STL
- BNE
2 stops24h 35m
Qantas Airways
Sun 6/78:45 am
BNE
- STL
2 stops22h 48m
Qantas Airways
Deal found 2/22![Qantas Airways logo]()
$1,119
This Delta deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1310:43 am
STL
- MEL
2 stops30h 07m
Delta
Sun 8/1610:00 am
MEL
- STL
2 stops25h 50m
Delta
Deal found 2/20![Delta logo]()
$1,134
This FlightHub deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 5/251:00 pm
STL
- BNE
2 stops51h 05m
Air Canada
Sun 6/710:00 am
BNE
- STL
2 stops49h 05m
Air Canada
Deal found 2/23![Air Canada logo]()
$1,135
This United Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 5/257:23 pm
STL
- BNE
1 stop20h 07m
United Airlines
Sun 6/710:30 am
BNE
- STL
1 stop22h 47m
United Airlines
Deal found 2/23![United Airlines logo]()
$1,168
This flugladen.de deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/74:05 pm
STL
- BNE
3 stops56h 45m
Multiple Airlines
Tue 4/148:40 pm
BNE
- STL
3 stops57h 44m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$1,213
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:29 am
STL
- MEL
2 stops34h 21m
Delta
Wed 4/1510:00 am
MEL
- STL
2 stops29h 25m
Delta
Deal found 2/21![Delta logo]()
$1,147
This Qantas Airways deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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.
Sun 5/246:36 am
STL
- BNE
1 stop31h 24m
Qantas Airways
Mon 6/86:00 am
BNE
- STL
2 stops27h 29m
Qantas Airways
Deal found 2/22![Qantas Airways logo]()
$1,172
This United Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 5/48:30 am
STL
- SYD
1 stop31h 25m
United Airlines
Mon 5/1810:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 2/22![United Airlines logo]()
$1,199
This Air Canada deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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.
Thu 4/94:05 pm
STL
- BNE
2 stops48h 00m
Multiple Airlines
Thu 4/168:40 pm
BNE
- STL
3 stops57h 44m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$1,214
This Qatar Airways deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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.
Sat 2/286:20 pm
STL
- CBR
3 stops45h 00m
Qatar Airways
Tue 3/312:30 pm
CBR
- STL
3 stops41h 03m
Qatar Airways
Deal found 2/23![Qatar Airways logo]()
$2,455
This Delta deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 5/49:59 am
STL
- SYD
2 stops29h 51m
Delta
Mon 5/189:15 am
SYD
- STL
2 stops23h 41m
Delta
Deal found 2/24![Delta logo]()
$1,149
This Qantas Airways deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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.
Sun 5/246:36 am
STL
- BNE
1 stop31h 24m
Qantas Airways
Tue 6/98:45 am
BNE
- STL
2 stops22h 48m
Qantas Airways
Deal found 2/22![Qantas Airways logo]()
$1,172
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/194:06 pm
STL
- MEL
2 stops25h 09m
United Airlines
Mon 8/1710:55 am
MEL
- STL
2 stops26h 11m
United Airlines
Deal found 2/20![United Airlines logo]()
$1,202
This Gotogate deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/94:05 pm
STL
- BNE
3 stops72h 55m
Air Canada
Thu 4/1610:05 am
BNE
- STL
3 stops68h 19m
Air Canada
Deal found 2/23![Air Canada logo]()
$1,329
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/712:04 pm
STL
- SYD
2 stops27h 46m
Delta
Tue 4/149:15 am
SYD
- STL
2 stops27h 04m
Delta
Deal found 2/21![Delta logo]()
$1,149
This Air New Zealand deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 5/139:14 am
STL
- MEL
3 stops34h 41m
Multiple Airlines
Wed 5/2012:10 pm
MEL
- STL
3 stops35h 31m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$1,331
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/1211:25 am
STL
- MEL
2 stops29h 35m
United Airlines
Sat 3/2112:00 pm
MEL
- STL
1 stop26h 25m
United Airlines
Deal found 2/20![United Airlines logo]()
$1,214
This Qantas Airways deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:21 am
STL
- MEL
1 stop33h 24m
Qantas Airways
Thu 8/209:45 am
MEL
- STL
1 stop28h 23m
Qantas Airways
Deal found 2/20![Qantas Airways logo]()
$1,334
This United Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/164:44 pm
STL
- SYD
2 stops23h 16m
United Airlines
Sat 5/2310:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 2/23![United Airlines logo]()
$1,225
This Delta deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 5/21:03 pm
STL
- SYD
2 stops26h 47m
Delta
Sat 5/169:15 am
SYD
- STL
2 stops29h 44m
Delta
Deal found 2/22![Delta logo]()
$1,230
This Air Canada deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 5/132:20 pm
STL
- AVV
3 stops32h 50m
Multiple Airlines
Wed 5/208:55 pm
AVV
- STL
3 stops54h 11m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$1,397
This United Airlines deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/28:30 am
STL
- SYD
1 stop31h 25m
United Airlines
Sat 5/1610:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 2/24![United Airlines logo]()
$1,226
This oojo deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” 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 5/46:21 am
STL
- CNS
2 stops46h 09m
Qantas Airways
Sun 8/912:35 pm
CNS
- STL
2 stops49h 33m
Qantas Airways
Deal found 2/24![Qantas Airways logo]()
$1,384
This lastminute.com deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:21 am
STL
- CNS
2 stops37h 54m
Multiple Airlines
Thu 4/1612:35 pm
CNS
- STL
2 stops45h 55m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$1,416
This United Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:30 am
STL
- SYD
1 stop31h 25m
United Airlines
Thu 4/1610:20 am
SYD
- STL
1 stop23h 04m
United Airlines
Deal found 2/22![United Airlines logo]()
$1,244
This Qantas Airways deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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.
Sun 3/86:50 pm
STL
- CNS
2 stops48h 55m
Qantas Airways
Wed 3/115:35 pm
CNS
- STL
2 stops45h 23m
Qantas Airways
Deal found 2/23![Qantas Airways logo]()
$1,396
This Ovago deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/78:30 am
STL
- AVV
2 stops47h 20m
Multiple Airlines
Tue 4/1410:30 am
AVV
- STL
2 stops46h 54m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$1,499
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Mon 6/110:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 2/20![United Airlines logo]()
$1,244
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/24:28 pm
STL
- SYD
1 stop21h 32m
United Airlines
Fri 3/1312:10 pm
SYD
- STL
1 stop26h 15m
United Airlines
Deal found 2/20![United Airlines logo]()
$1,244
This lastminute.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/66:38 am
STL
- CNS
2 stops37h 37m
Multiple Airlines
Mon 4/138:10 pm
CNS
- STL
2 stops42h 47m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$1,524
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated February 24, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated February 24, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 2/238:41 am
STL
- BNE
2 stops32h 04m
Air Canada
Fri 2/2710:45 am
BNE
- STL
2 stops22h 13m
Air Canada
Deal found 2/22![Air Canada logo]()
$1,118
This Qantas Airways deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/236:38 am
STL
- BNE
1 stop30h 22m
Qantas Airways
Fri 2/279:40 am
BNE
- STL
1 stop21h 48m
Qantas Airways
Deal found 2/22![Qantas Airways logo]()
$1,140
This United Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” 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 2/2310:10 am
STL
- BNE
2 stops29h 20m
United Airlines
Fri 2/2711:40 am
BNE
- STL
1 stop21h 04m
United Airlines
Deal found 2/22![United Airlines logo]()
$1,148
This oojo deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/244:13 pm
STL
- SYD
1 stop21h 42m
Qantas Airways
Tue 3/35:00 pm
SYD
- STL
2 stops23h 59m
Qantas Airways
Deal found 2/21![Qantas Airways logo]()
$1,102
This Travelocity deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:00 pm
STL
- SYD
2 stops46h 35m
Air Canada
Wed 3/411:20 am
SYD
- STL
2 stops42h 59m
Air Canada
Deal found 2/20![Air Canada logo]()
$1,073
This oojo deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:38 am
STL
- SYD
2 stops34h 12m
Qantas Airways
Sat 2/282:05 pm
SYD
- STL
1 stop20h 08m
Qantas Airways
Deal found 2/22![Qantas Airways logo]()
$1,108
This oojo deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/211:46 am
STL
- MEL
1 stop24h 14m
Qantas Airways
Thu 3/124:55 pm
MEL
- STL
2 stops23h 03m
Qantas Airways
Deal found 2/23![Qantas Airways logo]()
$1,089
This Expedia deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/24:30 pm
STL
- SYD
2 stops48h 05m
Air Canada
Fri 3/1310:20 am
SYD
- STL
2 stops29h 14m
Air Canada
Deal found 2/20![Air Canada logo]()
$1,115
This Delta deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” 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 3/46:00 am
STL
- SYD
2 stops33h 30m
Delta
Tue 3/109:40 am
SYD
- STL
2 stops30h 18m
Delta
Deal found 2/23![Delta logo]()
$1,149
This oojo deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/711:46 am
STL
- SYD
1 stop26h 09m
Qantas Airways
Sat 3/149:55 pm
SYD
- STL
2 stops33h 33m
Qantas Airways
Deal found 2/21![Qantas Airways logo]()
$1,127
This American Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/126:38 am
STL
- MEL
1 stop34h 52m
American Airlines
Sat 3/2112:00 pm
MEL
- STL
1 stop27h 58m
American Airlines
Deal found 2/21![American Airlines logo]()
$1,134
This American Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/2810:33 am
STL
- MEL
2 stops28h 12m
American Airlines
Mon 4/69:45 am
MEL
- STL
2 stops24h 44m
American Airlines
Deal found 2/23![American Airlines logo]()
$1,129
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 February 24, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated February 24, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/148:12 pm
STL
- MEL
3 stops48h 53m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$503
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/124:55 pm
STL
- MEL
3 stops52h 10m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$509
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:12 pm
STL
- MEL
3 stops48h 48m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$526
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/164:16 pm
STL
- MEL
3 stops53h 09m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$532
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/134:55 pm
STL
- MEL
2 stops46h 50m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$538
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/510:12 pm
STL
- MEL
3 stops47h 13m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$555
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1711:21 am
STL
- MEL
3 stops34h 04m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$558
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/158:12 pm
STL
- AVV
3 stops59h 38m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$605
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:12 pm
STL
- AVV
3 stops50h 58m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$617
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/148:12 pm
STL
- AVV
3 stops59h 38m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$621
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:21 am
STL
- AVV
2 stops42h 44m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$633
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:21 am
STL
- AVV
2 stops49h 29m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$640
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 February 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,060 (Air Canada) |
One-way from | $503 (Kiwi.com) |
Popular in | December |
Cheapest in | August |
Average price | $1,348 |
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 February 24, 2026.
Use the filters below to find and compare flights from St. Louis to Australia that are best for you.
Fly from
St. Louis
Fly to
Australia
Route
Depart
Return
Price
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Mon 5/25
7:20 pm-10:55 am
2 stops24h 35m
Brisbane
Sun 6/7
8:45 am-4:33 pm
2 stops22h 48m
$1,119
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Wed 5/13
10:43 am-7:50 am
2 stops30h 07m
Melbourne
Sun 8/16
10:00 am-8:50 pm
2 stops25h 50m
$1,134
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Mon 5/25
1:00 pm-7:05 am
2 stops51h 05m
Brisbane
Sun 6/7
10:00 am-8:05 pm
2 stops49h 05m
$1,135
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Wed 4/8
6:29 am-7:50 am
2 stops34h 21m
Melbourne
Wed 4/15
10:00 am-12:25 am
2 stops29h 25m
$1,147
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
9:59 am-6:50 am
2 stops29h 51m
Sydney Kingsford Smith
Mon 5/18
9:15 am-5:56 pm
2 stops23h 41m
$1,149
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Tue 4/7
12:04 pm-6:50 am
2 stops27h 46m
Sydney Kingsford Smith
Tue 4/14
9:15 am-9:19 pm
2 stops27h 04m
$1,149
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Mon 5/25
7:23 pm-6:30 am
1 stop20h 07m
Brisbane
Sun 6/7
10:30 am-6:17 pm
1 stop22h 47m
$1,168
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Sun 5/24
6:36 am-5:00 am
1 stop31h 24m
Brisbane
Mon 6/8
6:00 am-6:29 pm
2 stops27h 29m
$1,172
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Sun 5/24
6:36 am-5:00 am
1 stop31h 24m
Brisbane
Tue 6/9
8:45 am-4:33 pm
2 stops22h 48m
$1,172
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
8:30 am-6:55 am
1 stop31h 25m
Sydney Kingsford Smith
Mon 5/18
10:20 am-6:22 pm
1 stop23h 02m
$1,199
Showing 1-10 of 45 results
Best time to book a flight from St. Louis to Australia
Have a flexible travel schedule? Discover the best time to fly to Australia from St. Louis with our price prediction graph.
STL-SYD
STL-MEL
STL-BNE
STL-AVV
STL-CBR
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Australia
STL-AU0
STL-SYD
STL-MEL
STL-BNE
STL-AVV
What is the cheapest month to book a flight from St. Louis to Australia?
Currently, August is the cheapest month in which you can book a flight from St. Louis to Australia (average of $653). Flying from St. Louis to Australia in July is currently the most expensive (average of $1,239). 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 February 24, 2026.
Read reviews from past customers who have flown Fiji Airways, Qantas Airways, and United Airlines from St. Louis to Australia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Comfort
8.0
Food
7.5
Crew
8.5
Entertainment
7.5
Boarding
8.1
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.0
Comfort
8.0
Food
7.5
Crew
8.5
Entertainment
7.5
Boarding
8.1
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.0
Comfort
8.0
Food
7.5
Crew
8.5
Entertainment
7.5
Boarding
8.1
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.0
Comfort
8.0
Food
7.5
Crew
8.5
Entertainment
7.5
Boarding
8.1
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.0
Comfort
8.0
Food
7.5
Crew
8.5
Entertainment
7.5
Boarding
8.1
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Overall
8.0
Comfort
8.0
Food
7.5
Crew
8.5
Entertainment
7.5
Boarding
8.1
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - 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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top regions
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 February 24, 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 February 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$608 | Average$1,250 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$975 | Average$1,326 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,428 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,078 | Average$1,386 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,132 | Average$1,268 | FlexibilityNo cancel fee | On-time74% |