$527+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Apr 10 — Apr 171
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from St. Louis to AustraliaExplore the most affordable flight options available from St. Louis to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 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 March 11, 2026.
This Air Canada deal was found by Cheapflights users on 3/6. 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.
Tue 4/214:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Tue 4/2810:00 am
BNE
- STL
2 stops44h 25m
Air Canada
Deal found 3/6![Air Canada logo]()
$993
This Air Canada deal was found by Cheapflights users on 3/10. 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.
Fri 4/244:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Fri 5/110:00 am
BNE
- STL
2 stops41h 06m
Air Canada
Deal found 3/10![Air Canada logo]()
$1,064
This Trip.com deal was found by Cheapflights users on 3/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/274:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Sun 5/1010:00 am
BNE
- STL
2 stops41h 06m
Air Canada
Deal found 3/9![Air Canada logo]()
$1,087
This Air Canada deal was found by Cheapflights users on 3/10. 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.
Fri 4/242:40 pm
STL
- BNE
2 stops25h 25m
Multiple Airlines
Fri 5/18:45 pm
BNE
- STL
3 stops54h 21m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$1,090
This Air Canada deal was found by Cheapflights users on 3/10. 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.
Sat 4/254:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Wed 4/2910:00 am
BNE
- STL
2 stops25h 54m
Air Canada
Deal found 3/10![Air Canada logo]()
$1,109
This Jetabroad deal was found by Cheapflights users on 3/11. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:11 pm
STL
- MEL
2 stops34h 09m
Multiple Airlines
Sat 5/27:30 am
MEL
- STL
2 stops30h 27m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$1,134
This United Airlines deal was found by Cheapflights users on 3/6. 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.
Sat 4/259:16 am
STL
- BNE
2 stops54h 14m
United Airlines
Wed 4/2910:30 am
BNE
- STL
1 stop22h 54m
United Airlines
Deal found 3/6![United Airlines logo]()
$1,135
This oojo deal was found by Cheapflights users on 3/7. 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 12/93:59 pm
STL
- SYD
1 stop21h 56m
Qantas Airways
Tue 12/157:00 am
SYD
- STL
2 stops22h 32m
Qantas Airways
Deal found 3/7![Qantas Airways logo]()
$1,143
This oojo deal was found by Cheapflights users on 3/7. 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 5/46:21 am
STL
- SYD
2 stops35h 59m
Qantas Airways
Mon 5/1812:00 pm
SYD
- STL
1 stop22h 30m
Qantas Airways
Deal found 3/7![Qantas Airways logo]()
$1,146
This Gotogate deal was found by Cheapflights users on 3/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/234:48 pm
STL
- BNE
2 stops23h 17m
Air Canada
Fri 7/310:00 am
BNE
- STL
2 stops43h 02m
Air Canada
Deal found 3/10![Air Canada logo]()
$1,149
This United Airlines deal was found by Cheapflights users on 3/6. 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 4/211:10 pm
STL
- MEL
2 stops28h 05m
United Airlines
Tue 4/2810:55 am
MEL
- STL
1 stop22h 29m
United Airlines
Deal found 3/6![United Airlines logo]()
$1,177
This United Airlines deal was found by Cheapflights users on 3/6. 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 3/126:51 am
STL
- MEL
1 stop34h 09m
United Airlines
Sat 3/2110:30 am
MEL
- STL
2 stops26h 35m
United Airlines
Deal found 3/6![United Airlines logo]()
$1,187
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 March 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 March 11, 2026.
This Air Canada deal was found by Cheapflights users on 3/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/244:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Fri 5/110:00 am
BNE
- STL
2 stops41h 06m
Air Canada
Deal found 3/9![Air Canada logo]()
$1,126
This United Airlines deal was found by Cheapflights users on 3/6. 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.
Sat 4/259:16 am
STL
- BNE
2 stops54h 14m
United Airlines
Wed 4/2910:30 am
BNE
- STL
1 stop22h 54m
United Airlines
Deal found 3/6![United Airlines logo]()
$1,135
This Delta deal was found by Cheapflights users on 3/7. 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.
Mon 5/41:46 pm
STL
- SYD
2 stops26h 04m
Delta
Mon 5/189:15 am
SYD
- STL
2 stops26h 54m
Delta
Deal found 3/7![Delta logo]()
$1,199
This Qantas Airways deal was found by Cheapflights users on 3/6. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:21 am
STL
- SYD
2 stops35h 59m
Qantas Airways
Mon 5/412:00 pm
SYD
- STL
1 stop20h 21m
Qantas Airways
Deal found 3/6![Qantas Airways logo]()
$1,200
This KAYAK deal was found by Cheapflights users on 3/7. 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.
Mon 5/47:06 pm
STL
- SYD
1 stop20h 49m
Air New Zealand
Mon 5/1810:20 am
SYD
- STL
1 stop23h 02m
Air New Zealand
Deal found 3/7![Air New Zealand logo]()
$1,243
This Air New Zealand deal was found by Cheapflights users on 3/9. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:45 am
STL
- SYD
3 stops34h 00m
Multiple Airlines
Mon 5/189:55 am
SYD
- STL
2 stops27h 35m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$1,319
This United Airlines deal was found by Cheapflights users on 3/6. 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 4/211:10 pm
STL
- MEL
2 stops28h 05m
United Airlines
Tue 4/2810:55 am
MEL
- STL
1 stop22h 29m
United Airlines
Deal found 3/6![United Airlines logo]()
$1,177
This Qatar Airways deal was found by Cheapflights users on 3/8. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:46 pm
STL
- CBR
3 stops44h 34m
Qatar Airways
Wed 8/1912:10 pm
CBR
- STL
3 stops38h 59m
Qatar Airways
Deal found 3/8![Qatar Airways logo]()
$2,360
This Air Canada deal was found by Cheapflights users on 3/8. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/254:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Wed 4/2910:00 am
BNE
- STL
2 stops45h 57m
Air Canada
Deal found 3/8![Air Canada logo]()
$1,192
This Qantas Airways deal was found by Cheapflights users on 3/11. 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 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
Sun 8/97:40 am
BNE
- STL
2 stops24h 11m
Qantas Airways
Deal found 3/11![Qantas Airways logo]()
$1,272
This Air Canada deal was found by Cheapflights users on 3/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/274:05 pm
STL
- AVV
3 stops57h 00m
Multiple Airlines
Wed 5/68:55 pm
AVV
- STL
3 stops54h 11m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$1,361
This United Airlines deal was found by Cheapflights users on 3/6. 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 4/302:35 pm
STL
- SYD
2 stops25h 25m
United Airlines
Mon 5/49:30 am
SYD
- STL
2 stops22h 27m
United Airlines
Deal found 3/6![United Airlines logo]()
$1,240
This Qantas Airways deal was found by Cheapflights users on 3/11. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:21 am
STL
- BNE
1 stop31h 39m
Qantas Airways
Sat 8/87:40 pm
BNE
- STL
2 stops36h 11m
Qantas Airways
Deal found 3/11![Qantas Airways logo]()
$1,353
This Air New Zealand deal was found by Cheapflights users on 3/7. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:45 am
STL
- SYD
3 stops34h 00m
Multiple Airlines
Wed 6/1011:55 am
SYD
- STL
3 stops27h 02m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$1,374
This Delta deal was found by Cheapflights users on 3/7. 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.
Thu 5/217:00 am
STL
- SYD
2 stops32h 50m
Delta
Thu 6/119:15 am
SYD
- STL
2 stops37h 52m
Delta
Deal found 3/7![Delta logo]()
$1,513
This lastminute.com deal was found by Cheapflights users on 3/7. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:00 am
STL
- PER
2 stops45h 00m
Air New Zealand
Wed 4/297:50 pm
PER
- STL
2 stops39h 40m
Air New Zealand
Deal found 3/7![Air New Zealand logo]()
$1,527
This Air New Zealand deal was found by Cheapflights users on 3/9. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/249:10 am
STL
- SYD
3 stops32h 35m
Multiple Airlines
Fri 5/111:55 am
SYD
- STL
2 stops25h 35m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$1,414
This Qantas Airways deal was found by Cheapflights users on 3/6. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/153:33 pm
STL
- CBR
2 stops38h 57m
Qantas Airways
Wed 8/196:00 am
CBR
- STL
2 stops32h 08m
Qantas Airways
Deal found 3/6![Qantas Airways logo]()
$1,473
This United Airlines deal was found by Cheapflights users on 3/7. 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.
Sat 6/274:45 pm
STL
- BNE
2 stops46h 45m
United Airlines
Sun 7/510:30 am
BNE
- STL
1 stop22h 47m
United Airlines
Deal found 3/7![United Airlines logo]()
$1,529
This Sembo deal was found by Cheapflights users on 3/9. 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 Sembo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/234:46 pm
STL
- PER
2 stops60h 49m
Multiple Airlines
Thu 4/303:40 pm
PER
- STL
2 stops61h 10m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$1,533
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Sun 5/172:35 pm
STL
- MEL
2 stops26h 40m
United Airlines
Sun 8/169:30 am
MEL
- STL
2 stops23h 19m
United Airlines
Deal found 3/10![United Airlines logo]()
$1,542
This Qantas Airways deal was found by Cheapflights users on 3/10. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:21 am
STL
- SYD
2 stops35h 59m
Qantas Airways
Wed 8/129:10 am
SYD
- STL
1 stop28h 58m
Qantas Airways
Deal found 3/10![Qantas Airways logo]()
$1,555
This Air Canada deal was found by Cheapflights users on 3/6. 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 4/254:05 pm
STL
- CNS
3 stops56h 50m
Air Canada
Wed 4/294:35 pm
CNS
- STL
3 stops58h 31m
Air Canada
Deal found 3/6![Air Canada logo]()
$2,000
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Wed 5/1311:15 am
STL
- MEL
2 stops29h 15m
United Airlines
Mon 8/1010:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 3/10![United Airlines logo]()
$1,555
This Qantas Airways deal was found by Cheapflights users on 3/6. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:21 am
STL
- CNS
2 stops37h 14m
Qantas Airways
Wed 4/291:40 pm
CNS
- STL
2 stops42h 41m
Qantas Airways
Deal found 3/6![Qantas Airways logo]()
$1,556
This Sembo deal was found by Cheapflights users on 3/10. 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 Sembo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/244:46 pm
STL
- PER
2 stops54h 09m
Multiple Airlines
Fri 5/13:40 pm
PER
- STL
2 stops45h 19m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$1,571
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Wed 5/137:06 pm
STL
- SYD
1 stop20h 49m
United Airlines
Sun 8/99:30 am
SYD
- STL
2 stops22h 53m
United Airlines
Deal found 3/10![United Airlines logo]()
$1,562
This Qantas Airways deal was found by Cheapflights users on 3/8. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:38 pm
STL
- MEL
1 stop22h 22m
Qantas Airways
Wed 4/291:35 pm
MEL
- STL
1 stop20h 55m
Qantas Airways
Deal found 3/8![Qantas Airways logo]()
$1,592
This Qantas Airways deal was found by Cheapflights users on 3/11. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/257:23 pm
STL
- BNE
2 stops23h 42m
Multiple Airlines
Sun 7/58:45 am
BNE
- STL
3 stops26h 44m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$1,603
This Booking.com deal was found by Cheapflights users on 3/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/248:30 am
STL
- HBA
3 stops45h 55m
Air New Zealand
Fri 5/14:55 pm
HBA
- STL
3 stops44h 35m
Air New Zealand
Deal found 3/9![Air New Zealand logo]()
$2,361
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated March 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated March 11, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 3/6. 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 3/126:51 am
STL
- MEL
1 stop34h 09m
United Airlines
Sat 3/2110:30 am
MEL
- STL
2 stops26h 35m
United Airlines
Deal found 3/6![United Airlines logo]()
$1,187
This oojo deal was found by Cheapflights users on 3/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1910:09 am
STL
- MEL
2 stops33h 46m
Air New Zealand
Sun 5/38:35 am
MEL
- STL
2 stops28h 55m
Air New Zealand
Deal found 3/9![Air New Zealand logo]()
$1,214
This lastminute.com deal was found by Cheapflights users on 3/7. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:30 am
STL
- SYD
2 stops33h 15m
Air New Zealand
Mon 4/279:55 am
SYD
- STL
2 stops27h 33m
Air New Zealand
Deal found 3/7![Air New Zealand logo]()
$1,222
This Air Canada deal was found by Cheapflights users on 3/6. 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.
Tue 4/214:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Tue 4/2810:00 am
BNE
- STL
2 stops44h 25m
Air Canada
Deal found 3/6![Air Canada logo]()
$993
This United Airlines deal was found by Cheapflights users on 3/6. 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 4/214:49 pm
STL
- MEL
2 stops24h 26m
United Airlines
Tue 4/2810:55 am
MEL
- STL
2 stops23h 36m
United Airlines
Deal found 3/6![United Airlines logo]()
$1,177
This Air Canada deal was found by Cheapflights users on 3/10. 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.
Fri 4/244:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Fri 5/110:00 am
BNE
- STL
2 stops41h 06m
Air Canada
Deal found 3/10![Air Canada logo]()
$1,064
This Air Canada deal was found by Cheapflights users on 3/10. 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.
Fri 4/242:40 pm
STL
- BNE
2 stops25h 25m
Multiple Airlines
Fri 5/18:45 pm
BNE
- STL
3 stops54h 21m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$1,090
This Air Canada deal was found by Cheapflights users on 3/10. 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.
Sat 4/254:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Wed 4/2910:00 am
BNE
- STL
2 stops25h 54m
Air Canada
Deal found 3/10![Air Canada logo]()
$1,109
This Jetabroad deal was found by Cheapflights users on 3/11. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:11 pm
STL
- MEL
2 stops34h 09m
Multiple Airlines
Sat 5/27:30 am
MEL
- STL
2 stops30h 27m
Multiple Airlines
Deal found 3/11![Multiple Airlines logo]()
$1,134
This United Airlines deal was found by Cheapflights users on 3/6. 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.
Sat 4/259:16 am
STL
- BNE
2 stops54h 14m
United Airlines
Wed 4/2910:30 am
BNE
- STL
1 stop22h 54m
United Airlines
Deal found 3/6![United Airlines logo]()
$1,135
This Trip.com deal was found by Cheapflights users on 3/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/274:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Sun 5/1010:00 am
BNE
- STL
2 stops41h 06m
Air Canada
Deal found 3/9![Air Canada logo]()
$1,087
This Qantas Airways deal was found by Cheapflights users on 3/6. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:21 am
STL
- SYD
2 stops35h 59m
Qantas Airways
Mon 5/412:00 pm
SYD
- STL
1 stop20h 21m
Qantas Airways
Deal found 3/6![Qantas Airways logo]()
$1,200
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 March 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 March 11, 2026.
This Orbitz deal was found by Cheapflights users on 3/9. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/175:15 am
STL
- BNE
2 stops35h 30m
Air Canada
Deal found 3/9![Air Canada logo]()
$527
This Expedia deal was found by Cheapflights users on 3/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/164:05 pm
STL
- BNE
2 stops48h 40m
Air Canada
Deal found 3/9![Air Canada logo]()
$528
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Sun 5/3110:55 am
STL
- SYD
3 stops33h 55m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$528
This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Sat 4/41:06 pm
STL
- MEL
3 stops31h 54m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$530
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Thu 4/169:55 pm
STL
- MEL
3 stops47h 10m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$543
This Orbitz deal was found by Cheapflights users on 3/9. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/189:00 am
STL
- BNE
2 stops31h 45m
Air Canada
Deal found 3/9![Air Canada logo]()
$546
This Kiwi.com deal was found by Cheapflights users on 3/10. 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.
Mon 5/188:12 pm
STL
- MEL
3 stops48h 48m
Multiple Airlines
Deal found 3/10![Multiple Airlines logo]()
$562
This Kiwi.com deal was found by Cheapflights users on 3/7. 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.
Mon 6/88:08 pm
STL
- SYD
3 stops48h 42m
Multiple Airlines
Deal found 3/7![Multiple Airlines logo]()
$562
This Jetabroad deal was found by Cheapflights users on 3/10. 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 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 3/10![Multiple Airlines logo]()
$563
This Trip.com deal was found by Cheapflights users on 3/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1811:32 am
STL
- BNE
3 stops32h 03m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$579
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Tue 3/171:00 pm
STL
- BNE
3 stops30h 35m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$582
This Kiwi.com deal was found by Cheapflights users on 3/9. 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.
Mon 3/168:12 pm
STL
- BNE
3 stops47h 23m
Multiple Airlines
Deal found 3/9![Multiple Airlines logo]()
$592
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 March 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $993 (Air Canada) |
One-way from | $527 (Orbitz) |
Popular in | December |
Cheapest in | March |
Average price | $1,254 |
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 March 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
Fri 4/24
4:05 pm-7:05 am
2 stops48h 00m
Brisbane
Fri 5/1
10:00 am-12:06 pm
2 stops41h 06m
$1,126
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Sat 4/25
9:16 am-6:30 am
2 stops54h 14m
Brisbane
Wed 4/29
10:30 am-6:24 pm
1 stop22h 54m
$1,135
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 4/21
1:10 pm-8:15 am
2 stops28h 05m
Melbourne
Tue 4/28
10:55 am-6:24 pm
1 stop22h 29m
$1,177
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Sat 4/25
4:05 pm-7:05 am
2 stops48h 00m
Brisbane
Wed 4/29
10:00 am-4:57 pm
2 stops45h 57m
$1,192
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
1:46 pm-6:50 am
2 stops26h 04m
Sydney Kingsford Smith
Mon 5/18
9:15 am-9:09 pm
2 stops26h 54m
$1,199
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Thu 4/30
6:21 am-9:20 am
2 stops35h 59m
Sydney Kingsford Smith
Mon 5/4
12:00 pm-5:21 pm
1 stop20h 21m
$1,200
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Thu 4/30
2:35 pm-7:00 am
2 stops25h 25m
Sydney Kingsford Smith
Mon 5/4
9:30 am-4:57 pm
2 stops22h 27m
$1,240
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
7:06 pm-6:55 am
1 stop20h 49m
Sydney Kingsford Smith
Mon 5/18
10:20 am-6:22 pm
1 stop23h 02m
$1,243
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Tue 5/19
6:21 am-5:00 am
1 stop31h 39m
Brisbane
Sun 8/9
7:40 am-4:51 pm
2 stops24h 11m
$1,272
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
7:45 am-8:45 am
3 stops34h 00m
Sydney Kingsford Smith
Mon 5/18
9:55 am-10:30 pm
2 stops27h 35m
$1,319
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-SYD
STL-MEL
STL-BNE
STL-AVV
STL-PER
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Australia
STL-AU0
STL-SYD
STL-MEL
STL-BNE
STL-AVV
What is the cheapest month to book a flight from St. Louis to Australia?
Currently, August is the cheapest month in which you can book a flight from St. Louis to Australia (average of $649). 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 March 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.
Comfort
8.1
Boarding
8.1
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Comfort
8.1
Boarding
8.1
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Comfort
8.1
Boarding
8.1
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Comfort
8.1
Boarding
8.1
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Comfort
8.1
Boarding
8.1
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.5
Reviews
1 / 18
10.0
ExcellentAnonymous,Feb 2026
SFO - NAN
Comfort
8.1
Boarding
8.1
Overall
8.1
Entertainment
7.5
Food
7.5
Crew
8.5
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.
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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 March 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 March 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$608 | Average$1,077 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$975 | Average$1,325 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,427 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,370 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,132 | Average$1,268 | FlexibilityNo cancel fee | On-time74% |