$1,135+ Cheap flights from St. Louis (STL) to Australia
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
May 6 — May 131
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 April 6, 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 April 6, 2026.
This FlightHub deal was found by Cheapflights users on 4/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/271:20 pm
STL
- BNE
2 stops50h 45m
Air Canada
Sun 7/510:00 am
BNE
- STL
2 stops52h 57m
Air Canada
Deal found 4/1![Air Canada logo]()
$1,135
This Air Canada deal was found by Cheapflights users on 4/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:10 pm
STL
- BNE
2 stops27h 55m
Air Canada
Mon 9/2810:00 am
BNE
- STL
2 stops25h 00m
Air Canada
Deal found 4/1![Air Canada logo]()
$1,153
This Justfly.com deal was found by Cheapflights users on 4/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:10 am
STL
- SYD
2 stops35h 10m
Air Canada
Fri 9/119:20 am
SYD
- STL
2 stops42h 20m
Air Canada
Deal found 4/2![Air Canada logo]()
$1,153
This Air Canada deal was found by Cheapflights users on 4/4. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:10 pm
STL
- SYD
2 stops28h 10m
Air Canada
Fri 11/1311:20 am
SYD
- STL
2 stops45h 10m
Air Canada
Deal found 4/4![Air Canada logo]()
$1,156
This Air Canada deal was found by Cheapflights users on 4/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/138:55 am
STL
- SYD
2 stops31h 25m
Air Canada
Wed 11/1811:20 am
SYD
- STL
2 stops45h 10m
Air Canada
Deal found 4/1![Air Canada logo]()
$1,160
This Expedia deal was found by Cheapflights users on 4/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:40 am
STL
- SYD
2 stops31h 40m
Air Canada
Sat 7/119:20 am
SYD
- STL
2 stops43h 42m
Air Canada
Deal found 4/4![Air Canada logo]()
$1,161
This Air Canada deal was found by Cheapflights users on 4/5. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/111:05 pm
STL
- SYD
3 stops51h 15m
Air Canada
Tue 6/169:20 am
SYD
- STL
2 stops41h 46m
Air Canada
Deal found 4/5![Air Canada logo]()
$1,164
This Justfly.com deal was found by Cheapflights users on 4/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:20 am
STL
- SYD
2 stops35h 00m
Air Canada
Mon 10/1210:20 am
SYD
- STL
2 stops29h 23m
Air Canada
Deal found 4/3![Air Canada logo]()
$1,169
This Justfly.com deal was found by Cheapflights users on 4/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/75:10 am
STL
- SYD
2 stops35h 10m
Air Canada
Mon 9/149:20 am
SYD
- STL
2 stops29h 30m
Air Canada
Deal found 4/2![Air Canada logo]()
$1,176
This Air Canada deal was found by Cheapflights users on 4/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:10 pm
STL
- BNE
2 stops27h 55m
Multiple Airlines
Mon 9/288:40 pm
BNE
- STL
3 stops38h 20m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$1,181
This Air Canada deal was found by Cheapflights users on 4/3. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:15 pm
STL
- MEL
3 stops30h 05m
Multiple Airlines
Wed 5/208:50 pm
MEL
- STL
3 stops38h 19m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$1,185
This BusinessClass deal was found by Cheapflights users on 4/5. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/112:15 pm
STL
- SYD
2 stops26h 05m
Multiple Airlines
Tue 6/169:20 am
SYD
- STL
1 stop41h 46m
Multiple Airlines
Deal found 4/5![Multiple Airlines logo]()
$1,201
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 April 6, 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 April 6, 2026.
This Air Canada deal was found by Cheapflights users on 4/3. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:15 pm
STL
- MEL
3 stops30h 05m
Multiple Airlines
Wed 5/208:50 pm
MEL
- STL
3 stops38h 19m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$1,185
This BusinessClass deal was found by Cheapflights users on 4/5. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/118:40 am
STL
- SYD
1 stop31h 40m
Asiana Airlines
Tue 6/169:20 am
SYD
- STL
1 stop41h 46m
Asiana Airlines
Deal found 4/5![Asiana Airlines logo]()
$1,201
This Justfly.com deal was found by Cheapflights users on 4/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/271:20 pm
STL
- BNE
2 stops50h 45m
Air Canada
Sun 7/510:00 am
BNE
- STL
2 stops43h 02m
Air Canada
Deal found 4/3![Air Canada logo]()
$1,238
This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/186:21 am
STL
- BNE
1 stop31h 39m
American Airlines
Mon 5/258:35 pm
BNE
- STL
2 stops26h 57m
American Airlines
Deal found 4/2![American Airlines logo]()
$1,327
This oojo deal was found by Cheapflights users on 4/3. 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.
Mon 5/43:38 pm
STL
- MEL
1 stop22h 22m
Qantas Airways
Wed 5/209:45 am
MEL
- STL
1 stop29h 14m
Qantas Airways
Deal found 4/3![Qantas Airways logo]()
$1,461
This United Airlines deal was found by Cheapflights users on 4/3. 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 5/43:20 pm
STL
- MEL
2 stops25h 55m
United Airlines
Wed 5/2010:55 am
MEL
- STL
1 stop22h 27m
United Airlines
Deal found 4/3![United Airlines logo]()
$1,479
This oojo deal was found by Cheapflights users on 4/3. 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.
Tue 8/186:02 am
STL
- PER
2 stops47h 33m
Qatar Airways
Sun 9/2010:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 4/3![Qatar Airways logo]()
$1,610
This BusinessClass deal was found by Cheapflights users on 4/5. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/176:14 am
STL
- CNS
2 stops37h 31m
Air New Zealand
Mon 9/286:20 pm
CNS
- STL
3 stops37h 15m
Air New Zealand
Deal found 4/5![Air New Zealand logo]()
$1,915
This Jetabroad deal was found by Cheapflights users on 4/4. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:00 am
STL
- CBR
3 stops43h 05m
ANA
Mon 8/315:35 pm
CBR
- STL
3 stops35h 33m
ANA
Deal found 4/4![ANA logo]()
$2,009
This lastminute.com deal was found by Cheapflights users on 4/1. 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 lastminute.com 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
Sat 5/237:30 am
MEL
- STL
2 stops29h 12m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$1,232
This United Airlines deal was found by Cheapflights users on 4/4. 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
- MEL
1 stop22h 09m
United Airlines
Sat 5/2310:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 4/4![United Airlines logo]()
$1,479
This Orbitz deal was found by Cheapflights users on 4/4. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/42:40 pm
STL
- BNE
3 stops29h 50m
Multiple Airlines
Sat 7/117:25 pm
BNE
- STL
3 stops57h 37m
Multiple Airlines
Deal found 4/4![Multiple Airlines logo]()
$1,347
This Air Canada deal was found by Cheapflights users on 4/5. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:05 am
STL
- BNE
2 stops33h 00m
Air Canada
Sun 5/2410:00 am
BNE
- STL
2 stops25h 25m
Air Canada
Deal found 4/5![Air Canada logo]()
$1,487
This oojo deal was found by Cheapflights users on 4/5. 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 7/15:18 pm
STL
- BNE
2 stops25h 02m
Qantas Airways
Sat 7/117:40 am
BNE
- STL
2 stops24h 18m
Qantas Airways
Deal found 4/5![Qantas Airways logo]()
$1,550
This United Airlines deal was found by Cheapflights users on 4/2. 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.
Sun 5/174:44 pm
STL
- SYD
2 stops23h 16m
United Airlines
Sun 5/2410:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 4/2![United Airlines logo]()
$1,485
This Qatar Airways deal was found by Cheapflights users on 4/5. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:02 am
STL
- PER
2 stops47h 33m
Qatar Airways
Mon 9/2110:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 4/5![Qatar Airways logo]()
$1,667
This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/173:38 pm
STL
- CBR
2 stops30h 27m
American Airlines
Sun 5/246:10 am
CBR
- STL
2 stops25h 23m
American Airlines
Deal found 4/2![American Airlines logo]()
$1,697
This lastminute.com deal was found by Cheapflights users on 4/1. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:21 am
STL
- MEL
1 stop33h 24m
Qantas Airways
Sat 5/239:45 am
MEL
- STL
1 stop29h 11m
Qantas Airways
Deal found 4/1![Qantas Airways logo]()
$1,604
This United Airlines deal was found by Cheapflights users on 4/2. 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.
Mon 5/48:30 am
STL
- SYD
1 stop31h 25m
United Airlines
Mon 5/1810:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 4/2![United Airlines logo]()
$1,485
This Qatar Airways deal was found by Cheapflights users on 4/5. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:02 am
STL
- PER
2 stops47h 33m
Qatar Airways
Mon 9/2110:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 4/5![Qatar Airways logo]()
$1,667
This Air Canada deal was found by Cheapflights users on 4/1. 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 Air Canada 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
Wed 5/206:00 am
MEL
- STL
3 stops45h 06m
Air Canada
Deal found 4/1![Air Canada logo]()
$1,684
This United Airlines deal was found by Cheapflights users on 4/5. 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 5/37:06 pm
STL
- SYD
1 stop20h 49m
United Airlines
Sun 5/1010:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 4/5![United Airlines logo]()
$1,486
This oojo deal was found by Cheapflights users on 4/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:30 am
STL
- CBR
2 stops38h 40m
Qantas Airways
Mon 8/316:00 am
CBR
- STL
2 stops32h 08m
Qantas Airways
Deal found 4/4![Qantas Airways logo]()
$1,730
This United Airlines deal was found by Cheapflights users on 4/4. 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.
Tue 7/214:48 pm
STL
- SYD
2 stops23h 07m
United Airlines
Wed 8/510:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 4/4![United Airlines logo]()
$1,486
This Qatar Airways deal was found by Cheapflights users on 4/2. 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.
Mon 8/179:45 am
STL
- PER
2 stops43h 50m
Qatar Airways
Sun 9/2010:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 4/2![Qatar Airways logo]()
$1,813
This FlightHub deal was found by Cheapflights users on 4/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:21 am
STL
- AVV
2 stops46h 59m
Multiple Airlines
Fri 5/86:00 am
AVV
- STL
2 stops26h 21m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$1,839
This Qatar Airways deal was found by Cheapflights users on 4/2. 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.
Thu 8/204:18 pm
STL
- PER
2 stops37h 17m
Qatar Airways
Mon 9/2110:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 4/2![Qatar Airways logo]()
$1,846
This Gotogate deal was found by Cheapflights users on 4/5. 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.
Wed 5/207:05 am
STL
- MEL
3 stops37h 30m
Multiple Airlines
Wed 5/2712:10 pm
MEL
- STL
2 stops25h 35m
Multiple Airlines
Deal found 4/5![Multiple Airlines logo]()
$1,918
This oojo deal was found by Cheapflights users on 4/5. 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 9/176:30 am
STL
- CNS
2 stops39h 25m
Qantas Airways
Mon 9/285:00 pm
CNS
- STL
2 stops45h 02m
Qantas Airways
Deal found 4/5![Qantas Airways logo]()
$1,924
This United Airlines deal was found by Cheapflights users on 4/2. 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.
Sat 6/271:38 pm
STL
- BNE
2 stops49h 52m
United Airlines
Sun 7/510:30 am
BNE
- STL
1 stop22h 47m
United Airlines
Deal found 4/2![United Airlines logo]()
$1,626
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated April 6, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated April 6, 2026 and is based on user searches.
This Justfly.com deal was found by Cheapflights users on 4/1. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/304:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Thu 5/710:00 am
BNE
- STL
2 stops49h 43m
Air Canada
Deal found 4/1![Air Canada logo]()
$1,290
This BusinessClass deal was found by Cheapflights users on 4/5. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/31:05 pm
STL
- SYD
2 stops27h 15m
Multiple Airlines
Sun 5/109:20 am
SYD
- STL
1 stop41h 46m
Multiple Airlines
Deal found 4/5![Multiple Airlines logo]()
$1,308
This Air Canada deal was found by Cheapflights users on 4/3. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:15 pm
STL
- MEL
3 stops30h 05m
Multiple Airlines
Wed 5/208:50 pm
MEL
- STL
3 stops38h 19m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$1,185
This Air Canada deal was found by Cheapflights users on 4/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:15 pm
STL
- MEL
3 stops30h 20m
Air Canada
Wed 5/208:30 pm
MEL
- STL
3 stops38h 39m
Air Canada
Deal found 4/2![Air Canada logo]()
$1,207
This Air Canada deal was found by Cheapflights users on 4/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/41:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Mon 5/189:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 4/2![Air Canada logo]()
$1,262
This Air Canada deal was found by Cheapflights users on 4/3. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/141:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Thu 5/219:20 am
SYD
- STL
2 stops41h 46m
Air Canada
Deal found 4/3![Air Canada logo]()
$1,268
This lastminute.com deal was found by Cheapflights users on 4/1. 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 lastminute.com 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
Sat 5/237:30 am
MEL
- STL
2 stops29h 12m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$1,232
This FlightHub deal was found by Cheapflights users on 4/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/181:05 pm
STL
- BNE
2 stops27h 00m
Air Canada
Mon 6/1510:00 am
BNE
- STL
2 stops41h 06m
Air Canada
Deal found 4/4![Air Canada logo]()
$1,228
This Air Canada deal was found by Cheapflights users on 4/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/181:05 pm
STL
- BNE
2 stops27h 00m
Air Canada
Mon 5/258:45 pm
BNE
- STL
3 stops54h 21m
Air Canada
Deal found 4/2![Air Canada logo]()
$1,247
This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/183:38 pm
STL
- BNE
2 stops22h 22m
American Airlines
Mon 5/258:35 pm
BNE
- STL
2 stops26h 58m
American Airlines
Deal found 4/2![American Airlines logo]()
$1,327
This Air Canada deal was found by Cheapflights users on 4/5. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/207:05 am
STL
- SYD
2 stops33h 15m
Air Canada
Wed 5/279:20 am
SYD
- STL
3 stops50h 05m
Air Canada
Deal found 4/5![Air Canada logo]()
$1,351
This Air Canada deal was found by Cheapflights users on 4/3. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/261:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Wed 6/109:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 4/3![Air Canada logo]()
$1,338
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 April 6, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated April 6, 2026.
This BusinessClass deal was found by Cheapflights users on 4/2. 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 4/216:11 pm
STL
- BNE
2 stops25h 44m
Qantas Airways
Deal found 4/2![Qantas Airways logo]()
$1,498
This AranGrant deal was found by Cheapflights users on 4/2. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/126:21 am
STL
- BNE
2 stops38h 09m
Qantas Airways
Deal found 4/2![Qantas Airways logo]()
$1,577
This BusinessClass deal was found by Cheapflights users on 4/2. 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 4/213:25 pm
STL
- BNE
3 stops27h 40m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$1,578
This Kiwi.com deal was found by Cheapflights users on 4/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/126:29 am
STL
- BNE
3 stops37h 21m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$2,530
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 April 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,135 (FlightHub) |
Popular in | December |
Cheapest in | March |
Average price | $1,391 |
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 April 6, 2026.
Use the filters below to find and compare flights from St. Louis to Australia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Mon 5/4
2:15 pm-11:20 am
3 stops30h 05m
Melbourne
Wed 5/20
8:50 pm-8:09 pm
3 stops38h 19m
$1,185
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Thu 6/11
8:40 am-7:20 am
1 stop31h 40m
Sydney Kingsford Smith
Tue 6/16
9:20 am-12:06 pm
1 stop41h 46m
$1,201
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sat 5/16
6:11 pm-7:20 pm
2 stops34h 09m
Melbourne
Sat 5/23
7:30 am-9:42 pm
2 stops29h 12m
$1,232
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Sat 6/27
1:20 pm-7:05 am
2 stops50h 45m
Brisbane
Sun 7/5
10:00 am-2:02 pm
2 stops43h 02m
$1,238
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Mon 5/18
6:21 am-5:00 am
1 stop31h 39m
Brisbane
Mon 5/25
8:35 pm-8:32 am
2 stops26h 57m
$1,327
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Sat 7/4
2:40 pm-11:30 am
3 stops29h 50m
Brisbane
Sat 7/11
7:25 pm-2:02 pm
3 stops57h 37m
$1,347
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Mon 5/4
3:38 pm-5:00 am
1 stop22h 22m
Melbourne
Wed 5/20
9:45 am-11:59 pm
1 stop29h 14m
$1,461
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Mon 5/4
3:20 pm-8:15 am
2 stops25h 55m
Melbourne
Wed 5/20
10:55 am-6:22 pm
1 stop22h 27m
$1,479
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Mon 5/4
7:06 pm-8:15 am
1 stop22h 09m
Melbourne
Sat 5/23
10:55 am-6:17 pm
1 stop22h 22m
$1,479
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sun 5/17
4:44 pm-7:00 am
2 stops23h 16m
Sydney Kingsford Smith
Sun 5/24
10:20 am-6:17 pm
1 stop22h 57m
$1,485
Showing 1-10 of 33 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-BNE
STL-MEL
STL-SYD
STL-PER
STL-CNS
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-BNE
STL-MEL
STL-SYD
STL-PER
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 $645). 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 April 6, 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
Entertainment
7.5
Boarding
8.2
Food
7.5
Overall
8.1
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Boarding
8.2
Food
7.5
Overall
8.1
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Boarding
8.2
Food
7.5
Overall
8.1
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Boarding
8.2
Food
7.5
Overall
8.1
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Boarding
8.2
Food
7.5
Overall
8.1
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Boarding
8.2
Food
7.5
Overall
8.1
Crew
8.6
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 April 6, 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 April 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$887 | Average$1,268 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$975 | Average$1,307 | 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% |