$586+ Cheap flights from St. Louis (STL) to Australia
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Jun 9 — Jun 161
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 May 10, 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 May 10, 2026.
This oojo deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:13 pm
STL
- SYD
2 stops33h 37m
Qantas Airways
Tue 11/1011:15 am
SYD
- STL
1 stop29h 27m
Qantas Airways
Deal found 5/5![Qantas Airways logo]()
$1,013
This oojo deal was found by Cheapflights users on 5/7. 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.
Sat 11/77:00 am
STL
- SYD
1 stop33h 00m
Qantas Airways
Thu 11/197:15 pm
SYD
- STL
2 stops34h 22m
Qantas Airways
Deal found 5/7![Qantas Airways logo]()
$1,021
This American Airlines deal was found by Cheapflights users on 5/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/227:04 am
STL
- MEL
1 stop30h 56m
American Airlines
Mon 6/299:45 am
MEL
- STL
1 stop29h 11m
American Airlines
Deal found 5/8![American Airlines logo]()
$1,082
This American Airlines deal was found by Cheapflights users on 5/7. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1212:43 pm
STL
- MEL
2 stops27h 02m
American Airlines
Wed 9/231:35 pm
MEL
- STL
1 stop21h 11m
American Airlines
Deal found 5/7![American Airlines logo]()
$1,086
This Delta deal was found by Cheapflights users on 5/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/273:42 pm
STL
- MEL
2 stops25h 08m
Delta
Wed 11/1112:00 pm
MEL
- STL
2 stops22h 56m
Delta
Deal found 5/7![Delta logo]()
$1,105
This Delta deal was found by Cheapflights users on 5/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:51 am
STL
- MEL
2 stops28h 59m
Delta
Mon 11/912:00 pm
MEL
- STL
2 stops29h 36m
Delta
Deal found 5/8![Delta logo]()
$1,106
This Delta deal was found by Cheapflights users on 5/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:05 pm
STL
- MEL
2 stops69h 45m
Delta
Fri 9/2510:00 am
MEL
- STL
2 stops23h 00m
Delta
Deal found 5/7![Delta logo]()
$1,120
This oojo deal was found by Cheapflights users on 5/7. 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.
Fri 10/305:11 pm
STL
- MEL
2 stops30h 24m
Qantas Airways
Fri 11/1311:15 pm
MEL
- STL
1 stop41h 27m
Qantas Airways
Deal found 5/7![Qantas Airways logo]()
$1,136
This oojo deal was found by Cheapflights users on 5/7. 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.
Mon 10/266:30 am
STL
- MEL
1 stop35h 00m
Qantas Airways
Mon 11/91:55 pm
MEL
- STL
2 stops39h 42m
Qantas Airways
Deal found 5/7![Qantas Airways logo]()
$1,156
This oojo deal was found by Cheapflights users on 5/6. 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 10/243:33 pm
STL
- SYD
2 stops37h 17m
Qantas Airways
Sun 11/111:15 am
SYD
- STL
1 stop29h 27m
Qantas Airways
Deal found 5/6![Qantas Airways logo]()
$1,162
This oojo deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:30 am
STL
- SYD
1 stop33h 35m
Qantas Airways
Mon 10/265:50 pm
SYD
- STL
2 stops36h 55m
Qantas Airways
Deal found 5/5![Qantas Airways logo]()
$1,163
This American Airlines deal was found by Cheapflights users on 5/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:30 am
STL
- MEL
1 stop35h 00m
American Airlines
Mon 11/911:15 pm
MEL
- STL
2 stops25h 55m
American Airlines
Deal found 5/8![American Airlines logo]()
$1,189
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 May 10, 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 May 10, 2026.
This American Airlines deal was found by Cheapflights users on 5/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/228:36 am
STL
- MEL
1 stop29h 24m
American Airlines
Mon 6/292:05 pm
MEL
- STL
2 stops24h 51m
American Airlines
Deal found 5/9![American Airlines logo]()
$1,114
This Ovago deal was found by Cheapflights users on 5/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:23 pm
STL
- SYD
1 stop20h 32m
Air New Zealand
Sat 6/610:20 am
SYD
- STL
1 stop22h 57m
Air New Zealand
Deal found 5/10![Air New Zealand logo]()
$1,211
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Sat 8/17:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Fri 8/1410:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 5/9![United Airlines logo]()
$1,261
This Air Canada deal was found by Cheapflights users on 5/10. 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.
Wed 9/238:55 am
STL
- SYD
2 stops31h 25m
Air Canada
Wed 10/710:20 am
SYD
- STL
3 stops48h 21m
Air Canada
Deal found 5/10![Air Canada logo]()
$1,420
This Qantas Airways deal was found by Cheapflights users on 5/9. 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.
Mon 9/73:35 pm
STL
- SYD
1 stop24h 20m
Multiple Airlines
Mon 9/1412:00 pm
SYD
- STL
1 stop21h 14m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$1,458
This Qantas Airways deal was found by Cheapflights users on 5/7. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:51 pm
STL
- SYD
1 stop20h 04m
Qantas Airways
Fri 11/132:05 pm
SYD
- STL
1 stop19h 35m
Qantas Airways
Deal found 5/7![Qantas Airways logo]()
$1,506
This Qatar Airways deal was found by Cheapflights users on 5/6. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:00 am
STL
- MEL
2 stops43h 50m
Qatar Airways
Wed 8/1910:45 pm
MEL
- STL
2 stops38h 55m
Qatar Airways
Deal found 5/6![Qatar Airways logo]()
$1,880
This United Airlines deal was found by Cheapflights users on 5/8. 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.
Thu 8/131:36 pm
STL
- SYD
2 stops26h 19m
United Airlines
Sat 8/2210:20 am
SYD
- STL
2 stops22h 10m
United Airlines
Deal found 5/8![United Airlines logo]()
$1,266
This Air Canada deal was found by Cheapflights users on 5/7. 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 10/264:15 pm
STL
- AVV
3 stops53h 50m
Multiple Airlines
Mon 11/98:55 pm
AVV
- STL
3 stops59h 35m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$1,517
This Qantas Airways deal was found by Cheapflights users on 5/7. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:13 pm
STL
- BNE
2 stops27h 42m
Qantas Airways
Sat 8/2211:40 am
BNE
- STL
2 stops50h 15m
Qantas Airways
Deal found 5/7![Qantas Airways logo]()
$1,598
This Air Canada deal was found by Cheapflights users on 5/10. 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.
Wed 5/271:05 pm
STL
- SYD
3 stops51h 15m
Air Canada
Sat 6/69:20 am
SYD
- STL
2 stops41h 46m
Air Canada
Deal found 5/10![Air Canada logo]()
$1,650
This Air Canada deal was found by Cheapflights users on 5/6. 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.
Sun 10/188:55 am
STL
- AVV
3 stops37h 15m
Multiple Airlines
Sun 11/18:55 pm
AVV
- STL
3 stops59h 35m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$1,557
This Qantas Airways deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/255:18 pm
STL
- BNE
2 stops30h 17m
Qantas Airways
Sun 5/316:15 pm
BNE
- STL
2 stops44h 41m
Qantas Airways
Deal found 5/5![Qantas Airways logo]()
$1,601
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:23 pm
STL
- BNE
1 stop20h 07m
United Airlines
Tue 8/1810:30 am
BNE
- STL
2 stops25h 09m
United Airlines
Deal found 5/7![United Airlines logo]()
$1,612
This Qantas Airways deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/255:18 pm
STL
- BNE
2 stops26h 37m
Qantas Airways
Tue 6/25:35 pm
BNE
- STL
2 stops37h 58m
Qantas Airways
Deal found 5/5![Qantas Airways logo]()
$1,601
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:23 pm
STL
- BNE
2 stops24h 07m
United Airlines
Fri 7/1710:30 am
BNE
- STL
1 stop22h 47m
United Airlines
Deal found 5/7![United Airlines logo]()
$1,632
This Air New Zealand deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/161:13 pm
STL
- SYD
3 stops30h 27m
Multiple Airlines
Wed 8/1211:55 am
SYD
- STL
2 stops25h 21m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,719
This Qantas Airways deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/226:35 am
STL
- BNE
2 stops40h 00m
Qantas Airways
Wed 6/36:15 am
BNE
- STL
2 stops25h 18m
Qantas Airways
Deal found 5/5![Qantas Airways logo]()
$1,632
This United Airlines deal was found by Cheapflights users on 5/6. 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.
Thu 6/256:01 am
STL
- BNE
3 stops37h 29m
United Airlines
Sun 7/510:30 am
BNE
- STL
1 stop22h 47m
United Airlines
Deal found 5/6![United Airlines logo]()
$1,633
This Qatar Airways deal was found by Cheapflights users on 5/7. 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.
Sat 10/313:33 pm
STL
- CBR
3 stops48h 47m
Qatar Airways
Wed 11/412:30 pm
CBR
- STL
3 stops49h 25m
Qatar Airways
Deal found 5/7![Qatar Airways logo]()
$2,240
This Qantas Airways deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:13 pm
STL
- SYD
2 stops23h 42m
Multiple Airlines
Tue 11/1010:20 am
SYD
- STL
3 stops26h 10m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,782
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:23 pm
STL
- BNE
2 stops24h 07m
United Airlines
Sat 7/186:55 am
BNE
- STL
2 stops26h 22m
United Airlines
Deal found 5/7![United Airlines logo]()
$1,649
This Qatar Airways deal was found by Cheapflights users on 5/9. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:37 am
STL
- MEL
2 stops43h 13m
Qatar Airways
Sun 7/510:45 pm
MEL
- STL
2 stops40h 14m
Qatar Airways
Deal found 5/9![Qatar Airways logo]()
$2,263
This Air New Zealand deal was found by Cheapflights users on 5/8. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/261:36 pm
STL
- SYD
3 stops28h 09m
Multiple Airlines
Sat 9/1211:55 am
SYD
- STL
3 stops26h 55m
Multiple Airlines
Deal found 5/8![Multiple Airlines logo]()
$1,799
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/77:23 pm
STL
- BNE
2 stops24h 07m
United Airlines
Thu 8/207:05 am
BNE
- STL
3 stops47h 33m
United Airlines
Deal found 5/7![United Airlines logo]()
$1,675
This oojo deal was found by Cheapflights users on 5/8. 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.
Mon 10/266:51 pm
STL
- AVV
2 stops28h 59m
Qantas Airways
Mon 11/98:10 am
AVV
- STL
2 stops25h 30m
Qantas Airways
Deal found 5/8![Qantas Airways logo]()
$1,949
This Jetabroad deal was found by Cheapflights users on 5/6. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/2011:10 am
STL
- PER
3 stops39h 15m
Air New Zealand
Sat 6/274:25 pm
PER
- STL
2 stops38h 52m
Air New Zealand
Deal found 5/6![Air New Zealand logo]()
$2,967
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/77:23 pm
STL
- BNE
2 stops24h 07m
United Airlines
Mon 8/177:05 am
BNE
- STL
3 stops47h 33m
United Airlines
Deal found 5/7![United Airlines logo]()
$1,675
This Air Canada deal was found by Cheapflights users on 5/7. 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.
Sat 9/122:40 pm
STL
- AVV
3 stops32h 30m
Multiple Airlines
Wed 9/238:55 pm
AVV
- STL
3 stops56h 05m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$1,892
This Qantas Airways deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:11 pm
STL
- MEL
1 stop20h 49m
Qantas Airways
Wed 8/199:45 am
MEL
- STL
1 stop28h 10m
Qantas Airways
Deal found 5/5![Qantas Airways logo]()
$2,154
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated May 10, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated May 10, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/102:35 pm
STL
- SYD
2 stops25h 20m
United Airlines
Sun 5/179:30 am
SYD
- STL
2 stops23h 42m
United Airlines
Deal found 5/5![United Airlines logo]()
$1,309
This oojo deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/106:21 am
STL
- SYD
1 stop33h 44m
Qantas Airways
Sun 5/179:10 am
SYD
- STL
1 stop29h 49m
Qantas Airways
Deal found 5/5![Qantas Airways logo]()
$1,324
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/199:21 am
STL
- MEL
2 stops31h 54m
United Airlines
Tue 6/210:55 am
MEL
- STL
2 stops25h 26m
United Airlines
Deal found 5/5![United Airlines logo]()
$1,283
This Gotogate deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/217:05 am
STL
- SYD
2 stops33h 15m
Air Canada
Mon 5/259:20 am
SYD
- STL
2 stops53h 37m
Air Canada
Deal found 5/5![Air Canada logo]()
$1,353
This American Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/222:36 pm
STL
- BNE
2 stops23h 24m
American Airlines
Mon 6/12:25 pm
BNE
- STL
2 stops24h 31m
American Airlines
Deal found 5/5![American Airlines logo]()
$1,434
This Mytrip deal was found by Cheapflights users on 5/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/242:15 pm
STL
- SYD
2 stops26h 05m
Air Canada
Thu 5/289:20 am
SYD
- STL
2 stops50h 50m
Air Canada
Deal found 5/8![Air Canada logo]()
$1,356
This Expedia deal was found by Cheapflights users on 5/8. 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.
Sun 5/246:35 am
STL
- SYD
1 stop33h 30m
Qantas Airways
Thu 5/289:10 am
SYD
- STL
1 stop29h 46m
Qantas Airways
Deal found 5/8![Qantas Airways logo]()
$1,449
This Ovago deal was found by Cheapflights users on 5/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:23 pm
STL
- SYD
1 stop20h 32m
Air New Zealand
Sat 6/610:20 am
SYD
- STL
1 stop22h 57m
Air New Zealand
Deal found 5/10![Air New Zealand logo]()
$1,211
This Delta deal was found by Cheapflights users on 5/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/511:25 am
STL
- SYD
2 stops28h 25m
Delta
Fri 6/129:15 am
SYD
- STL
2 stops30h 28m
Delta
Deal found 5/6![Delta logo]()
$1,265
This oojo deal was found by Cheapflights users on 5/6. 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.
Fri 6/56:35 am
STL
- SYD
1 stop33h 30m
Qantas Airways
Fri 6/129:10 am
SYD
- STL
1 stop29h 46m
Qantas Airways
Deal found 5/6![Qantas Airways logo]()
$1,450
This American Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/191:42 pm
STL
- MEL
2 stops26h 03m
American Airlines
Fri 6/269:45 am
MEL
- STL
2 stops23h 45m
American Airlines
Deal found 5/5![American Airlines logo]()
$1,422
This American Airlines deal was found by Cheapflights users on 5/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/227:04 am
STL
- MEL
1 stop30h 56m
American Airlines
Mon 6/299:45 am
MEL
- STL
1 stop29h 11m
American Airlines
Deal found 5/8![American Airlines logo]()
$1,082
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 May 10, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated May 10, 2026.
This American Airlines deal was found by Cheapflights users on 5/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1612:27 pm
STL
- MEL
2 stops27h 18m
American Airlines
Deal found 5/9![American Airlines logo]()
$586
This FlightHub deal was found by Cheapflights users on 5/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:05 am
STL
- MEL
3 stops37h 00m
Air Canada
Deal found 5/6![Air Canada logo]()
$751
This BusinessClass deal was found by Cheapflights users on 5/10. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/167:12 am
STL
- MEL
3 stops38h 28m
Qantas Airways
Deal found 5/10![Qantas Airways logo]()
$757
This oojo deal was found by Cheapflights users on 5/6. 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.
Fri 5/156:21 am
STL
- HBA
2 stops48h 04m
Qantas Airways
Deal found 5/6![Qantas Airways logo]()
$846
This Kiwi.com deal was found by Cheapflights users on 5/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:33 pm
STL
- AVV
3 stops53h 37m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$847
This Trip.com deal was found by Cheapflights users on 5/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:21 am
STL
- SYD
1 stop34h 09m
Qantas Airways
Deal found 5/10![Qantas Airways logo]()
$866
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Sat 6/207:19 pm
STL
- PER
3 stops58h 11m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$870
This BusinessClass deal was found by Cheapflights users on 5/10. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/152:35 pm
STL
- SYD
2 stops25h 25m
Air New Zealand
Deal found 5/10![Air New Zealand logo]()
$874
This Kiwi.com deal was found by Cheapflights users on 5/6. 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.
Sat 5/168:08 pm
STL
- HBA
3 stops57h 17m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$879
This KAYAK deal was found by Cheapflights users on 5/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:21 am
STL
- HBA
2 stops40h 54m
Qantas Airways
Deal found 5/6![Qantas Airways logo]()
$923
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 5/158:08 pm
STL
- HBA
3 stops59h 22m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$945
This United Airlines deal was found by Cheapflights users on 5/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:23 pm
STL
- BNE
2 stops24h 07m
United Airlines
Deal found 5/7![United Airlines logo]()
$946
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 May 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,013 (oojo) |
One-way from | $586 (American Airlines) |
Popular in | December |
Cheapest in | March |
Average price | $1,341 |
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 May 10, 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
Mon 6/22
8:36 am-5:00 am
1 stop29h 24m
Melbourne
Mon 6/29
2:05 pm-11:56 pm
2 stops24h 51m
$1,114
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 5/27
7:23 pm-6:55 am
1 stop20h 32m
Sydney Kingsford Smith
Sat 6/6
10:20 am-6:17 pm
1 stop22h 57m
$1,211
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sat 8/1
7:23 pm-6:55 am
1 stop20h 32m
Sydney Kingsford Smith
Fri 8/14
10:20 am-6:39 pm
1 stop23h 19m
$1,261
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Thu 8/13
1:36 pm-6:55 am
2 stops26h 19m
Sydney Kingsford Smith
Sat 8/22
10:20 am-5:30 pm
2 stops22h 10m
$1,266
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 9/23
8:55 am-7:20 am
2 stops31h 25m
Sydney Kingsford Smith
Wed 10/7
10:20 am-6:41 pm
3 stops48h 21m
$1,420
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 9/7
3:35 pm-6:55 am
1 stop24h 20m
Sydney Kingsford Smith
Mon 9/14
12:00 pm-6:14 pm
1 stop21h 14m
$1,458
Quickest round-trip
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Tue 10/13
6:51 pm-6:55 am
1 stop20h 04m
Sydney Kingsford Smith
Fri 11/13
2:05 pm-4:40 pm
1 stop19h 35m
$1,506
St. LouisMelbourne
STL - AVV
STLAVV
Lambert-St Louis
Mon 10/26
4:15 pm-2:05 pm
3 stops53h 50m
Melbourne Avalon
Mon 11/9
8:55 pm-3:30 pm
3 stops59h 35m
$1,517
St. LouisMelbourne
STL - AVV
STLAVV
Lambert-St Louis
Sun 10/18
8:55 am-2:10 pm
3 stops37h 15m
Melbourne Avalon
Sun 11/1
8:55 pm-3:30 pm
3 stops59h 35m
$1,557
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Mon 8/3
5:13 pm-11:55 am
2 stops27h 42m
Brisbane
Sat 8/22
11:40 am-10:55 pm
2 stops50h 15m
$1,598
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-MEL
STL-SYD
STL-AVV
STL-BNE
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-MEL
STL-SYD
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 $310). Flying from St. Louis to Australia in June is currently the most expensive (average of $1,225). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing Australia
Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated May 10, 2026.
Read reviews from past customers who have flown Fiji Airways,Qantas Airways, andUnited Airlines from St. Louis to Australia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Boarding
8.2
Crew
8.6
Food
7.5
Comfort
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Boarding
8.2
Crew
8.6
Food
7.5
Comfort
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Boarding
8.2
Crew
8.6
Food
7.5
Comfort
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Boarding
8.2
Crew
8.6
Food
7.5
Comfort
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Boarding
8.2
Crew
8.6
Food
7.5
Comfort
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Boarding
8.2
Crew
8.6
Food
7.5
Comfort
8.1
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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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 May 10, 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 May 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$887 | Average$1,264 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$998 | Average$1,324 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,429 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,365 | FlexibilityNo cancel fee | On-time71% |