$603+ 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Aug 10 — Aug 171
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 July 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 July 11, 2026.
This Bravofly deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:00 am
STL
- SYD
1 stop34h 05m
Qantas Airways
Sun 8/309:10 am
SYD
- STL
1 stop28h 49m
Qantas Airways
Deal found 7/9![Qantas Airways logo]()
$1,131
This oojo deal was found by Cheapflights users on 7/6. 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.
Mon 8/173:32 pm
STL
- SYD
1 stop24h 23m
Qantas Airways
Mon 8/2412:00 pm
SYD
- STL
1 stop21h 05m
Qantas Airways
Deal found 7/6![Qantas Airways logo]()
$1,146
This United Airlines deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/267:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Sun 8/910:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 7/11![United Airlines logo]()
$1,178
This Vliegwinkel deal was found by Cheapflights users on 7/9. 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 Vliegwinkel 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
Fri 8/289:45 am
MEL
- STL
1 stop28h 14m
Qantas Airways
Deal found 7/9![Qantas Airways logo]()
$1,186
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Wed 8/128:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Sun 8/3010:20 am
SYD
- STL
1 stop22h 39m
United Airlines
Deal found 7/8![United Airlines logo]()
$1,186
This Delta deal was found by Cheapflights users on 7/8. 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.
Wed 8/1212:52 pm
STL
- SYD
2 stops26h 58m
Delta
Sun 8/309:15 am
SYD
- STL
2 stops29h 43m
Delta
Deal found 7/8![Delta logo]()
$1,191
This American Airlines deal was found by Cheapflights users on 7/9. 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.
Tue 10/278:48 am
STL
- MEL
1 stop28h 12m
American Airlines
Wed 11/1111:15 pm
MEL
- STL
2 stops26h 43m
American Airlines
Deal found 7/9![American Airlines logo]()
$1,193
This American Airlines deal was found by Cheapflights users on 7/9. 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.
Wed 8/125:11 pm
STL
- SYD
1 stop22h 44m
American Airlines
Sun 8/309:10 am
SYD
- STL
2 stops23h 55m
American Airlines
Deal found 7/9![American Airlines logo]()
$1,193
This oojo deal was found by Cheapflights users on 7/9. 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.
Thu 8/66:00 am
STL
- MEL
1 stop33h 45m
Qantas Airways
Sun 8/309:45 am
MEL
- STL
1 stop28h 14m
Qantas Airways
Deal found 7/9![Qantas Airways logo]()
$1,194
This United Airlines deal was found by Cheapflights users on 7/6. 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.
Wed 8/191:36 pm
STL
- MEL
2 stops26h 54m
United Airlines
Wed 8/2610:55 am
MEL
- STL
1 stop22h 44m
United Airlines
Deal found 7/6![United Airlines logo]()
$1,199
This United Airlines deal was found by Cheapflights users on 7/9. 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 8/1512:59 pm
STL
- MEL
2 stops28h 16m
United Airlines
Fri 8/289:30 am
MEL
- STL
2 stops24h 02m
United Airlines
Deal found 7/9![United Airlines logo]()
$1,201
This Delta deal was found by Cheapflights users on 7/8. 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.
Tue 10/207:20 pm
STL
- MEL
2 stops45h 30m
Delta
Tue 11/312:00 pm
MEL
- STL
2 stops25h 41m
Delta
Deal found 7/8![Delta logo]()
$1,211
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 July 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 July 11, 2026.
This United Airlines deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/267:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Sun 8/910:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 7/11![United Airlines logo]()
$1,178
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:52 pm
STL
- SYD
2 stops26h 58m
Delta
Sun 8/309:15 am
SYD
- STL
2 stops29h 43m
Delta
Deal found 7/9![Delta logo]()
$1,191
This Qantas Airways deal was found by Cheapflights users on 7/8. 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.
Sat 8/225:11 pm
STL
- SYD
1 stop22h 44m
Qantas Airways
Sat 8/2912:00 pm
SYD
- STL
1 stop21h 05m
Qantas Airways
Deal found 7/8![Qantas Airways logo]()
$1,302
This FlightHub deal was found by Cheapflights users on 7/6. 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.
Mon 8/312:10 pm
STL
- BNE
2 stops51h 55m
Air Canada
Mon 8/3110:00 am
BNE
- STL
2 stops41h 40m
Air Canada
Deal found 7/6![Air Canada logo]()
$1,392
This Air Canada deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:05 pm
STL
- AVV
3 stops63h 10m
Multiple Airlines
Wed 11/116:00 am
AVV
- STL
3 stops50h 26m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$1,435
This Qatar Airways deal was found by Cheapflights users on 7/9. 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.
Thu 9/106:29 am
STL
- PER
2 stops47h 06m
Qatar Airways
Mon 9/1410:45 pm
PER
- STL
2 stops33h 22m
Qatar Airways
Deal found 7/9![Qatar Airways logo]()
$1,925
This United Airlines deal was found by Cheapflights users on 7/6. 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.
Wed 8/191:36 pm
STL
- MEL
2 stops26h 54m
United Airlines
Wed 8/2610:55 am
MEL
- STL
1 stop22h 44m
United Airlines
Deal found 7/6![United Airlines logo]()
$1,199
This Delta deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:20 pm
STL
- MEL
2 stops45h 30m
Delta
Tue 11/312:00 pm
MEL
- STL
2 stops25h 41m
Delta
Deal found 7/9![Delta logo]()
$1,211
This Qantas Airways deal was found by Cheapflights users on 7/6. 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 11/141:20 pm
STL
- MEL
1 stop22h 40m
Qantas Airways
Wed 11/187:00 am
MEL
- STL
2 stops33h 42m
Qantas Airways
Deal found 7/6![Qantas Airways logo]()
$1,317
This United Airlines deal was found by Cheapflights users on 7/7. 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 10/277:05 pm
STL
- MEL
1 stop22h 25m
United Airlines
Wed 11/1112:45 pm
MEL
- STL
1 stop26h 25m
United Airlines
Deal found 7/7![United Airlines logo]()
$1,211
This Air Canada deal was found by Cheapflights users on 7/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:40 pm
STL
- AVV
3 stops33h 25m
Multiple Airlines
Tue 11/36:00 am
AVV
- STL
3 stops50h 26m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$1,435
This Air Canada deal was found by Cheapflights users on 7/10. 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.
Mon 8/3112:10 pm
STL
- BNE
2 stops27h 55m
Air Canada
Tue 9/158:45 pm
BNE
- STL
3 stops38h 35m
Air Canada
Deal found 7/10![Air Canada logo]()
$1,437
This Delta deal was found by Cheapflights users on 7/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:55 pm
STL
- SYD
2 stops25h 55m
Delta
Wed 10/710:15 am
SYD
- STL
2 stops27h 01m
Delta
Deal found 7/11![Delta logo]()
$1,311
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Sat 8/221:05 pm
STL
- MEL
2 stops28h 10m
United Airlines
Sat 8/2910:55 am
MEL
- STL
2 stops27h 45m
United Airlines
Deal found 7/8![United Airlines logo]()
$1,216
This United Airlines deal was found by Cheapflights users on 7/7. 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 10/204:39 pm
STL
- MEL
2 stops24h 36m
United Airlines
Tue 11/312:45 pm
MEL
- STL
1 stop26h 25m
United Airlines
Deal found 7/7![United Airlines logo]()
$1,216
This Ovago deal was found by Cheapflights users on 7/9. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/87:23 pm
STL
- CNS
2 stops34h 27m
Multiple Airlines
Sat 8/151:55 pm
CNS
- STL
2 stops43h 04m
Multiple Airlines
Deal found 7/9![Multiple Airlines logo]()
$1,489
This Air Canada deal was found by Cheapflights users on 7/7. 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.
Fri 8/218:55 am
STL
- BNE
3 stops35h 35m
Air Canada
Fri 8/2810:00 am
BNE
- STL
2 stops47h 42m
Air Canada
Deal found 7/7![Air Canada logo]()
$1,606
This Qantas Airways deal was found by Cheapflights users on 7/10. 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.
Sat 11/73:59 pm
STL
- CBR
2 stops26h 21m
Qantas Airways
Wed 11/117:45 pm
CBR
- STL
2 stops44h 57m
Qantas Airways
Deal found 7/10![Qantas Airways logo]()
$1,631
This United Airlines deal was found by Cheapflights users on 7/8. 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 10/297:05 pm
STL
- BNE
1 stop20h 25m
United Airlines
Mon 11/211:40 am
BNE
- STL
1 stop26h 30m
United Airlines
Deal found 7/8![United Airlines logo]()
$1,245
This oojo deal was found by Cheapflights users on 7/7. 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 8/216:00 am
STL
- CNS
2 stops49h 30m
Multiple Airlines
Fri 8/2812:35 pm
CNS
- STL
2 stops49h 24m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$1,522
This oojo deal was found by Cheapflights users on 7/6. 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.
Thu 8/206:00 am
STL
- PER
2 stops40h 15m
Qantas Airways
Thu 8/2711:45 pm
PER
- STL
2 stops36h 14m
Qantas Airways
Deal found 7/6![Qantas Airways logo]()
$1,631
This United Airlines deal was found by Cheapflights users on 7/10. 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 10/189:04 am
STL
- MEL
2 stops32h 11m
United Airlines
Sat 11/1412:45 pm
MEL
- STL
1 stop26h 25m
United Airlines
Deal found 7/10![United Airlines logo]()
$1,265
This KAYAK deal was found by Cheapflights users on 7/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/2612:35 pm
STL
- CNS
3 stops42h 50m
Multiple Airlines
Sun 8/29:40 pm
CNS
- STL
2 stops41h 19m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$1,549
This United Airlines deal was found by Cheapflights users on 7/9. 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 11/72:56 pm
STL
- MEL
2 stops26h 34m
United Airlines
Sat 11/1412:10 pm
MEL
- STL
2 stops46h 53m
United Airlines
Deal found 7/9![United Airlines logo]()
$1,281
This Air Canada deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/132:40 pm
STL
- AVV
3 stops32h 30m
Multiple Airlines
Sun 9/278:55 pm
AVV
- STL
3 stops56h 05m
Multiple Airlines
Deal found 7/11![Multiple Airlines logo]()
$1,558
This oojo deal was found by Cheapflights users on 7/9. 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.
Sat 8/85:11 pm
STL
- CNS
2 stops27h 39m
Qantas Airways
Sat 8/156:50 am
CNS
- STL
2 stops24h 24m
Qantas Airways
Deal found 7/9![Qantas Airways logo]()
$1,726
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Fri 8/74:48 pm
STL
- SYD
2 stops23h 07m
United Airlines
Fri 8/1410:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 7/8![United Airlines logo]()
$1,286
This Air Canada deal was found by Cheapflights users on 7/6. 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.
Mon 8/312:10 pm
STL
- BNE
2 stops27h 55m
Multiple Airlines
Mon 8/318:40 pm
BNE
- STL
3 stops38h 42m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$1,563
This United Airlines deal was found by Cheapflights users on 7/7. 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.
Wed 9/234:40 pm
STL
- SYD
2 stops23h 20m
United Airlines
Wed 10/710:30 am
SYD
- STL
2 stops24h 13m
United Airlines
Deal found 7/7![United Airlines logo]()
$1,306
This Qantas Airways deal was found by Cheapflights users on 7/7. 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 8/173:32 pm
STL
- HBA
2 stops38h 53m
Qantas Airways
Fri 8/214:55 pm
HBA
- STL
2 stops45h 04m
Qantas Airways
Deal found 7/7![Qantas Airways logo]()
$1,922
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated July 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated July 11, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 7/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/267:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Sun 8/910:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 7/11![United Airlines logo]()
$1,178
This American Airlines deal was found by Cheapflights users on 7/9. 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.
Thu 8/612:45 pm
STL
- MEL
2 stops27h 00m
American Airlines
Sun 8/309:45 am
MEL
- STL
2 stops25h 06m
American Airlines
Deal found 7/9![American Airlines logo]()
$1,193
This oojo deal was found by Cheapflights users on 7/9. 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.
Thu 8/66:00 am
STL
- MEL
1 stop33h 45m
Qantas Airways
Sun 8/309:45 am
MEL
- STL
1 stop28h 14m
Qantas Airways
Deal found 7/9![Qantas Airways logo]()
$1,194
This Bravofly deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:00 am
STL
- SYD
1 stop34h 05m
Qantas Airways
Sun 8/309:10 am
SYD
- STL
1 stop28h 49m
Qantas Airways
Deal found 7/9![Qantas Airways logo]()
$1,131
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Wed 8/128:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Sun 8/3010:20 am
SYD
- STL
1 stop22h 39m
United Airlines
Deal found 7/8![United Airlines logo]()
$1,186
This Delta deal was found by Cheapflights users on 7/8. 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.
Wed 8/1212:52 pm
STL
- SYD
2 stops26h 58m
Delta
Sun 8/309:15 am
SYD
- STL
2 stops29h 43m
Delta
Deal found 7/8![Delta logo]()
$1,191
This American Airlines deal was found by Cheapflights users on 7/9. 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.
Wed 8/125:11 pm
STL
- SYD
1 stop22h 44m
American Airlines
Sun 8/309:10 am
SYD
- STL
2 stops23h 55m
American Airlines
Deal found 7/9![American Airlines logo]()
$1,193
This Vliegwinkel deal was found by Cheapflights users on 7/9. 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 Vliegwinkel 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
Fri 8/289:45 am
MEL
- STL
1 stop28h 14m
Qantas Airways
Deal found 7/9![Qantas Airways logo]()
$1,186
This United Airlines deal was found by Cheapflights users on 7/9. 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 8/1512:59 pm
STL
- MEL
2 stops28h 16m
United Airlines
Fri 8/289:30 am
MEL
- STL
2 stops24h 02m
United Airlines
Deal found 7/9![United Airlines logo]()
$1,201
This oojo deal was found by Cheapflights users on 7/6. 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.
Mon 8/173:32 pm
STL
- SYD
1 stop24h 23m
Qantas Airways
Mon 8/2412:00 pm
SYD
- STL
1 stop21h 05m
Qantas Airways
Deal found 7/6![Qantas Airways logo]()
$1,146
This United Airlines deal was found by Cheapflights users on 7/6. 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.
Wed 8/191:36 pm
STL
- MEL
2 stops26h 54m
United Airlines
Wed 8/2610:55 am
MEL
- STL
1 stop22h 44m
United Airlines
Deal found 7/6![United Airlines logo]()
$1,199
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Sat 8/221:05 pm
STL
- MEL
2 stops28h 10m
United Airlines
Sat 8/2910:55 am
MEL
- STL
2 stops27h 45m
United Airlines
Deal found 7/8![United Airlines logo]()
$1,216
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 July 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 July 11, 2026.
This oojo deal was found by Cheapflights users on 7/8. 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.
Sun 8/303:35 pm
STL
- SYD
1 stop24h 20m
Qantas Airways
Deal found 7/8![Qantas Airways logo]()
$603
This United Airlines deal was found by Cheapflights users on 7/8. 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.
Sun 8/308:35 am
STL
- SYD
2 stops31h 25m
United Airlines
Deal found 7/8![United Airlines logo]()
$625
This United Airlines deal was found by Cheapflights users on 7/10. 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 10/1410:27 am
STL
- MEL
2 stops30h 48m
United Airlines
Deal found 7/10![United Airlines logo]()
$636
This Trip.com deal was found by Cheapflights users on 7/9. 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 10/143:20 pm
STL
- MEL
1 stop21h 40m
Qantas Airways
Deal found 7/9![Qantas Airways logo]()
$649
This Kiwi.com deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/306:45 pm
STL
- SYD
3 stops47h 40m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$718
This oojo deal was found by Cheapflights users on 7/8. 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.
Sun 7/196:37 am
STL
- SYD
1 stop33h 28m
Qantas Airways
Deal found 7/8![Qantas Airways logo]()
$772
This American Airlines deal was found by Cheapflights users on 7/8. 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.
Sun 7/191:14 pm
STL
- SYD
1 stop26h 41m
American Airlines
Deal found 7/8![American Airlines logo]()
$780
This Air Canada deal was found by Cheapflights users on 7/10. 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 10/142:40 pm
STL
- MEL
3 stops29h 30m
Multiple Airlines
Deal found 7/10![Multiple Airlines logo]()
$808
This United Airlines deal was found by Cheapflights users on 7/9. 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.
Fri 7/175:59 pm
STL
- SYD
2 stops46h 01m
United Airlines
Deal found 7/9![United Airlines logo]()
$845
This Orbitz deal was found by Cheapflights users on 7/9. 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 10/146:04 am
STL
- AVV
2 stops46h 16m
Multiple Airlines
Deal found 7/9![Multiple Airlines logo]()
$848
This BusinessClass deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/86:13 pm
STL
- MEL
2 stops26h 22m
Qantas Airways
Deal found 7/7![Qantas Airways logo]()
$1,174
This Arangrant deal was found by Cheapflights users on 7/7. 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 Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/911:39 am
STL
- MEL
2 stops31h 01m
Qantas Airways
Deal found 7/7![Qantas Airways logo]()
$1,186
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 July 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,131 (Bravofly) |
One-way from | $603 (oojo) |
Popular in | December |
Cheapest in | July |
Average price | $1,161 |
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 July 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
Quickest round-trip
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sun 7/26
7:23 pm-6:55 am
1 stop20h 32m
Sydney Kingsford Smith
Sun 8/9
10:20 am-6:17 pm
1 stop22h 57m
$1,178
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 8/12
12:52 pm-6:50 am
2 stops26h 58m
Sydney Kingsford Smith
Sun 8/30
9:15 am-11:58 pm
2 stops29h 43m
$1,191
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Wed 8/19
1:36 pm-7:30 am
2 stops26h 54m
Melbourne
Wed 8/26
10:55 am-6:39 pm
1 stop22h 44m
$1,199
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/20
7:20 pm-8:50 am
2 stops45h 30m
Melbourne
Tue 11/3
12:00 pm-8:41 pm
2 stops25h 41m
$1,211
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/27
7:05 pm-9:30 am
1 stop22h 25m
Melbourne
Wed 11/11
12:45 pm-10:10 pm
1 stop26h 25m
$1,211
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sat 8/22
1:05 pm-8:15 am
2 stops28h 10m
Melbourne
Sat 8/29
10:55 am-11:40 pm
2 stops27h 45m
$1,216
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/20
4:39 pm-9:15 am
2 stops24h 36m
Melbourne
Tue 11/3
12:45 pm-10:10 pm
1 stop26h 25m
$1,216
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Thu 10/29
7:05 pm-6:30 am
1 stop20h 25m
Brisbane
Mon 11/2
11:40 am-10:10 pm
1 stop26h 30m
$1,245
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sun 10/18
9:04 am-9:15 am
2 stops32h 11m
Melbourne
Sat 11/14
12:45 pm-10:10 pm
1 stop26h 25m
$1,265
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sat 11/7
2:56 pm-10:30 am
2 stops26h 34m
Melbourne
Sat 11/14
12:10 pm-6:03 pm
2 stops46h 53m
$1,281
Showing 1-10 of 51 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Australia
Have a flexible travel schedule? Discover the best time to fly to Australia from St. Louis with our price prediction graph.
STL-SYD
STL-MEL
STL-AVV
STL-BNE
STL-PER
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Australia
STL-AU0
STL-SYD
STL-MEL
STL-AVV
STL-BNE
What is the cheapest month to book a flight from St. Louis to Australia?
Currently, May is the cheapest month in which you can book a flight from St. Louis to Australia (average of $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 July 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.
Entertainment
7.5
Comfort
8.1
Crew
8.6
Boarding
8.1
Food
7.5
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Comfort
8.1
Crew
8.6
Boarding
8.1
Food
7.5
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Comfort
8.1
Crew
8.6
Boarding
8.1
Food
7.5
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Comfort
8.1
Crew
8.6
Boarding
8.1
Food
7.5
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Comfort
8.1
Crew
8.6
Boarding
8.1
Food
7.5
Overall
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Comfort
8.1
Crew
8.6
Boarding
8.1
Food
7.5
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 July 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 July 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$998 | Average$1,334 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,402 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,343 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,265 | Average$1,291 | FlexibilityNo cancel fee | On-time74% |