$705+ 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 6 — Jun 131
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 7, 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 7, 2026.
This oojo deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 12/23:59 pm
STL
- BNE
2 stops28h 51m
Qantas Airways
Mon 12/141:10 pm
BNE
- STL
1 stop26h 47m
Qantas Airways
Deal found 5/3![Qantas Airways logo]()
$981
This oojo deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 10/246:30 am
STL
- SYD
1 stop34h 30m
Qantas Airways
Sat 11/75:50 pm
SYD
- STL
2 stops39h 50m
Qantas Airways
Deal found 5/3![Qantas Airways logo]()
$1,012
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 5/6. 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 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 American Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 10/1812:43 pm
STL
- MEL
2 stops26h 02m
American Airlines
Sun 11/111:15 pm
MEL
- STL
2 stops26h 43m
American Airlines
Deal found 5/3![American Airlines logo]()
$1,271
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.
Wed 5/64:44 pm
STL
- MEL
2 stops23h 46m
United Airlines
Wed 5/2010:55 am
MEL
- STL
1 stop22h 27m
United Airlines
Deal found 5/5![United Airlines logo]()
$1,278
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 5/197:45 am
STL
- MEL
2 stops33h 30m
United Airlines
Tue 6/210:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 5/5![United Airlines logo]()
$1,283
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:06 pm
STL
- SYD
1 stop20h 49m
United Airlines
Mon 5/1110:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 5/4![United Airlines logo]()
$1,304
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.
Wed 5/66:21 am
STL
- SYD
1 stop33h 44m
Qantas Airways
Wed 5/139:10 am
SYD
- STL
1 stop29h 49m
Qantas Airways
Deal found 5/5![Qantas Airways logo]()
$1,315
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 7, 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 7, 2026.
This United Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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 5/261:13 pm
STL
- SYD
2 stops26h 47m
United Airlines
Wed 6/1010:20 am
SYD
- STL
2 stops21h 13m
United Airlines
Deal found 5/2![United Airlines logo]()
$1,308
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/61:19 pm
STL
- SYD
2 stops26h 46m
American Airlines
Sat 6/139:10 am
SYD
- STL
2 stops23h 23m
American Airlines
Deal found 5/6![American Airlines logo]()
$1,461
This Delta deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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.
Sun 10/48:50 am
STL
- SYD
2 stops31h 00m
Delta
Sun 10/1810:15 am
SYD
- STL
2 stops26h 22m
Delta
Deal found 5/2![Delta logo]()
$1,465
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 Alaska Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:59 pm
STL
- SYD
2 stops45h 26m
Alaska Airlines
Tue 9/229:25 pm
SYD
- STL
2 stops34h 38m
Alaska Airlines
Deal found 5/4![Alaska Airlines logo]()
$1,748
This BusinessClass deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:00 am
STL
- PER
2 stops35h 50m
Cathay Pacific
Sun 9/2012:10 am
PER
- STL
2 stops34h 50m
Cathay Pacific
Deal found 5/2![Cathay Pacific logo]()
$1,854
This Qatar Airways deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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 8/1511:35 am
STL
- MEL
2 stops43h 30m
Qatar Airways
Wed 8/1910:45 pm
MEL
- STL
2 stops38h 55m
Qatar Airways
Deal found 5/2![Qatar Airways logo]()
$1,904
This Qantas Airways deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 5/4![Qantas Airways logo]()
$2,153
This Turkish Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:32 pm
STL
- MEL
3 stops35h 08m
Turkish Airlines
Wed 8/199:35 pm
MEL
- STL
3 stops62h 47m
Turkish Airlines
Deal found 5/3![Turkish Airlines logo]()
$2,230
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/82:57 pm
STL
- SYD
2 stops25h 03m
United Airlines
Tue 6/239:30 am
SYD
- STL
2 stops29h 27m
United Airlines
Deal found 5/4![United Airlines logo]()
$1,308
This United Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:23 pm
STL
- CBR
2 stops31h 47m
United Airlines
Mon 6/88:10 am
CBR
- STL
2 stops25h 07m
United Airlines
Deal found 5/3![United Airlines logo]()
$1,413
This United Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” 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 6/97:23 pm
STL
- CBR
2 stops26h 52m
United Airlines
Tue 7/78:10 am
CBR
- STL
2 stops25h 07m
United Airlines
Deal found 5/1![United Airlines logo]()
$1,413
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 United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/294:48 pm
STL
- SYD
2 stops23h 12m
United Airlines
Fri 6/510:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/4![United Airlines logo]()
$1,440
This Air New Zealand deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 8/173:02 pm
STL
- SYD
2 stops26h 43m
Multiple Airlines
Mon 8/3111:55 am
SYD
- STL
3 stops26h 55m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$1,744
This Air New Zealand deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 10/131:36 pm
STL
- SYD
3 stops27h 09m
Multiple Airlines
Wed 11/1811:45 am
SYD
- STL
3 stops28h 09m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$1,748
This United Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:23 pm
STL
- CBR
2 stops24h 17m
United Airlines
Sat 5/306:50 pm
CBR
- STL
3 stops59h 56m
United Airlines
Deal found 5/2![United Airlines logo]()
$1,508
This Qatar Airways deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 10/315:11 pm
STL
- CBR
3 stops47h 09m
Qatar Airways
Wed 11/412:30 pm
CBR
- STL
3 stops49h 25m
Qatar Airways
Deal found 5/3![Qatar Airways logo]()
$2,240
This Cathay Pacific deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/249:47 am
STL
- PER
2 stops48h 08m
Cathay Pacific
Tue 10/2712:25 am
PER
- STL
2 stops30h 39m
Cathay Pacific
Deal found 5/2![Cathay Pacific logo]()
$2,242
This Qantas 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:37 am
STL
- MEL
1 stop33h 08m
Qantas Airways
Sun 7/58:30 pm
MEL
- STL
2 stops42h 29m
Qantas Airways
Deal found 5/6![Qantas Airways logo]()
$2,363
This Cathay Pacific 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:16 am
STL
- PER
2 stops47h 24m
Multiple Airlines
Sun 9/2012:10 am
PER
- STL
2 stops31h 28m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$1,826
This Qatar Airways deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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 5/2![Qatar Airways logo]()
$2,250
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/127:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Mon 6/229:30 am
SYD
- STL
2 stops29h 27m
United Airlines
Deal found 5/4![United Airlines logo]()
$1,576
This Qantas Airways deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” 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 10/265:11 pm
STL
- CNS
2 stops35h 09m
Qantas Airways
Fri 10/3011:50 am
CNS
- STL
2 stops50h 15m
Qantas Airways
Deal found 5/2![Qantas Airways logo]()
$2,394
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/133:22 pm
STL
- SYD
2 stops24h 38m
United Airlines
Mon 6/229:30 am
SYD
- STL
2 stops29h 27m
United Airlines
Deal found 5/4![United Airlines logo]()
$1,576
This Qantas Airways deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/272:32 pm
STL
- BNE
3 stops29h 58m
Multiple Airlines
Sun 7/58:45 am
BNE
- STL
2 stops22h 43m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$2,006
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/287:23 pm
STL
- BNE
1 stop20h 07m
United Airlines
Sun 7/1210:30 am
BNE
- STL
2 stops38h 37m
United Airlines
Deal found 5/4![United Airlines logo]()
$1,598
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.
Thu 6/252:15 pm
STL
- BNE
3 stops30h 50m
Multiple Airlines
Sun 7/58:45 pm
BNE
- STL
3 stops56h 17m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$2,028
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 5/4![United Airlines logo]()
$1,632
This United Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” 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 6/275:33 pm
STL
- BNE
2 stops45h 57m
United Airlines
Sun 7/510:30 am
BNE
- STL
2 stops27h 59m
United Airlines
Deal found 5/3![United Airlines logo]()
$1,632
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated May 7, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated May 7, 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.
Wed 5/64:44 pm
STL
- MEL
2 stops23h 46m
United Airlines
Wed 5/2010:55 am
MEL
- STL
1 stop22h 27m
United Airlines
Deal found 5/5![United Airlines logo]()
$1,278
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 5/66:21 am
STL
- SYD
1 stop33h 44m
Qantas Airways
Wed 5/139:10 am
SYD
- STL
1 stop29h 49m
Qantas Airways
Deal found 5/5![Qantas Airways logo]()
$1,315
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 United Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Wed 6/1010:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 5/2![United Airlines logo]()
$1,304
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 United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/84:52 pm
STL
- SYD
2 stops23h 03m
United Airlines
Sun 6/219:30 am
SYD
- STL
2 stops28h 59m
United Airlines
Deal found 5/4![United Airlines logo]()
$1,308
This Qantas Airways deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/86:35 am
STL
- SYD
1 stop33h 30m
Qantas Airways
Sun 6/219:10 am
SYD
- STL
1 stop29h 46m
Qantas Airways
Deal found 5/4![Qantas Airways logo]()
$1,375
This United Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/114:48 pm
STL
- SYD
2 stops23h 07m
United Airlines
Tue 6/239:30 am
SYD
- STL
2 stops29h 27m
United Airlines
Deal found 5/4![United Airlines logo]()
$1,376
This Qantas Airways deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” 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 6/147:20 pm
STL
- SYD
1 stop20h 35m
Qantas Airways
Sun 6/219:10 am
SYD
- STL
1 stop29h 46m
Qantas Airways
Deal found 5/4![Qantas Airways logo]()
$1,363
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 7, 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 7, 2026.
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/162:37 pm
STL
- MEL
2 stops25h 08m
American Airlines
Deal found 5/6![American Airlines logo]()
$705
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 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.
Wed 5/136:51 pm
STL
- HBA
3 stops56h 49m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$820
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 5/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/168:08 pm
STL
- AVV
3 stops59h 42m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$853
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 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 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.
Thu 7/25:13 pm
STL
- SYD
2 stops22h 52m
American Airlines
Deal found 5/5![American Airlines logo]()
$921
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 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.
Thu 7/26:37 am
STL
- SYD
1 stop33h 28m
Qantas Airways
Deal found 5/5![Qantas Airways logo]()
$934
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 Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/27:38 pm
STL
- SYD
3 stops32h 12m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$976
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 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,265 (Delta) |
One-way from | $705 (American Airlines) |
Popular in | December |
Cheapest in | March |
Average price | $1,434 |
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 7, 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. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Tue 5/26
1:13 pm-7:00 am
2 stops26h 47m
Sydney Kingsford Smith
Wed 6/10
10:20 am-4:33 pm
2 stops21h 13m
$1,308
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 6/8
2:57 pm-7:00 am
2 stops25h 03m
Sydney Kingsford Smith
Tue 6/23
9:30 am-11:57 pm
2 stops29h 27m
$1,308
St. LouisCanberra
STL - CBR
STLCBR
Lambert-St Louis
Mon 6/1
7:23 pm-6:10 pm
2 stops31h 47m
Canberra
Mon 6/8
8:10 am-6:17 pm
2 stops25h 07m
$1,413
St. LouisCanberra
STL - CBR
STLCBR
Lambert-St Louis
Tue 6/9
7:23 pm-1:15 pm
2 stops26h 52m
Canberra
Tue 7/7
8:10 am-6:17 pm
2 stops25h 07m
$1,413
Quickest round-trip
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Fri 5/29
4:48 pm-7:00 am
2 stops23h 12m
Sydney Kingsford Smith
Fri 6/5
10:20 am-6:17 pm
1 stop22h 57m
$1,440
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sat 6/6
1:19 pm-7:05 am
2 stops26h 46m
Sydney Kingsford Smith
Sat 6/13
9:10 am-5:33 pm
2 stops23h 23m
$1,461
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sun 10/4
8:50 am-7:50 am
2 stops31h 00m
Sydney Kingsford Smith
Sun 10/18
10:15 am-8:37 pm
2 stops26h 22m
$1,465
St. LouisCanberra
STL - CBR
STLCBR
Lambert-St Louis
Fri 5/22
7:23 pm-10:40 am
2 stops24h 17m
Canberra
Sat 5/30
6:50 pm-3:46 pm
3 stops59h 56m
$1,508
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. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Fri 6/12
7:23 pm-6:55 am
1 stop20h 32m
Sydney Kingsford Smith
Mon 6/22
9:30 am-11:57 pm
2 stops29h 27m
$1,576
Showing 1-10 of 43 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-AVV
STL-PER
STL-MEL
STL-CBR
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Australia
STL-AU0
STL-SYD
STL-AVV
STL-PER
STL-MEL
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 7, 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
8.2
Crew
8.6
Food
7.5
Overall
8.1
Entertainment
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Boarding
8.2
Crew
8.6
Food
7.5
Overall
8.1
Entertainment
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Boarding
8.2
Crew
8.6
Food
7.5
Overall
8.1
Entertainment
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Boarding
8.2
Crew
8.6
Food
7.5
Overall
8.1
Entertainment
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Boarding
8.2
Crew
8.6
Food
7.5
Overall
8.1
Entertainment
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Boarding
8.2
Crew
8.6
Food
7.5
Overall
8.1
Entertainment
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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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 7, 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 7, 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$1,325 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,029 | Average$1,430 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,365 | FlexibilityNo cancel fee | On-time71% |