$487+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Apr 23 — Apr 301
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Australia with Cheapflights
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from St. Louis to AustraliaExplore the most affordable flight options available from St. Louis to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 24, 2026.
Explore the most affordable flight options available from St. Louis to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 24, 2026.
This Air Canada deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 5/61:05 pm
STL
- BNE
2 stops27h 00m
Air Canada
Wed 5/1310:00 am
BNE
- STL
2 stops25h 25m
Air Canada
Deal found 3/22![Air Canada logo]()
$963
This Air Canada deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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
- BNE
2 stops51h 00m
Air Canada
Mon 5/1110:00 am
BNE
- STL
2 stops49h 25m
Air Canada
Deal found 3/19![Air Canada logo]()
$965
This Expedia deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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.
Tue 5/51:05 pm
STL
- BNE
2 stops51h 00m
Air Canada
Tue 5/1210:00 am
BNE
- STL
2 stops49h 25m
Air Canada
Deal found 3/21![Air Canada logo]()
$968
This Expedia deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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.
Thu 5/71:05 pm
STL
- BNE
2 stops51h 00m
Air Canada
Thu 5/1410:00 am
BNE
- STL
2 stops25h 25m
Air Canada
Deal found 3/23![Air Canada logo]()
$1,044
This Air Canada deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 5/62:15 pm
STL
- BNE
3 stops30h 45m
Multiple Airlines
Wed 5/137:25 pm
BNE
- STL
3 stops39h 44m
Multiple Airlines
Deal found 3/22![Multiple Airlines logo]()
$1,064
This Air Canada deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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 5/52:15 pm
STL
- BNE
3 stops30h 45m
Multiple Airlines
Tue 5/127:25 pm
BNE
- STL
3 stops39h 44m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$1,087
This Air Canada deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 5/31:05 pm
STL
- BNE
2 stops51h 00m
Multiple Airlines
Sun 5/1010:00 am
BNE
- STL
2 stops21h 57m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$1,131
This Air Canada deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 5/51:05 pm
STL
- SYD
2 stops27h 15m
Air Canada
Tue 5/129:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 3/20![Air Canada logo]()
$1,139
This Air Canada deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 5/119:20 am
SYD
- STL
2 stops41h 46m
Air Canada
Deal found 3/20![Air Canada logo]()
$1,144
This Air Canada deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 5/31:05 pm
STL
- BNE
2 stops27h 00m
Air Canada
Sun 5/108:45 pm
BNE
- STL
3 stops54h 21m
Air Canada
Deal found 3/19![Air Canada logo]()
$1,153
This Air Canada deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 9/1112:10 pm
STL
- SYD
2 stops28h 10m
Air Canada
Mon 9/219:20 am
SYD
- STL
2 stops48h 21m
Air Canada
Deal found 3/19![Air Canada logo]()
$1,154
This Air Canada deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 stops52h 10m
Air Canada
Wed 11/1811:20 am
SYD
- STL
2 stops45h 10m
Air Canada
Deal found 3/20![Air Canada logo]()
$1,159
Best flights from St. Louis to AustraliaDiscover carefully curated flight deals from St. Louis to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 24, 2026.
Discover carefully curated flight deals from St. Louis to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 24, 2026.
This Expedia deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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.
Tue 5/51:05 pm
STL
- BNE
2 stops51h 00m
Air Canada
Tue 5/1210:00 am
BNE
- STL
2 stops49h 25m
Air Canada
Deal found 3/21![Air Canada logo]()
$968
This American Airlines deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 5/36:21 am
STL
- BNE
1 stop31h 39m
American Airlines
Sun 5/108:35 pm
BNE
- STL
2 stops27h 19m
American Airlines
Deal found 3/19![American Airlines logo]()
$1,258
This Air Canada deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 9/118:55 am
STL
- AVV
3 stops38h 15m
Multiple Airlines
Mon 9/218:55 pm
AVV
- STL
3 stops56h 05m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$1,265
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:49 pm
STL
- MEL
2 stops24h 26m
United Airlines
Sun 7/510:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 3/22![United Airlines logo]()
$1,381
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 4/310:12 am
STL
- MEL
2 stops30h 38m
Delta
Sun 4/1910:00 am
MEL
- STL
2 stops28h 13m
Delta
Deal found 3/22![Delta logo]()
$1,393
This Qatar Airways deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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.
Wed 9/166:41 am
STL
- PER
2 stops46h 54m
Qatar Airways
Wed 10/2110:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 3/22![Qatar Airways logo]()
$1,595
This oojo deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 9/186:30 am
STL
- CBR
2 stops38h 40m
Qantas Airways
Thu 9/245:35 pm
CBR
- STL
2 stops44h 27m
Qantas Airways
Deal found 3/23![Qantas Airways logo]()
$1,630
This Air Canada deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 3/19![Air Canada logo]()
$1,194
This Air Canada deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 9/118:55 am
STL
- MEL
3 stops35h 10m
Multiple Airlines
Mon 9/218:50 pm
MEL
- STL
3 stops38h 10m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$1,286
This American Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 6/279:41 am
STL
- BNE
2 stops28h 19m
American Airlines
Sun 7/58:35 pm
BNE
- STL
2 stops27h 12m
American Airlines
Deal found 3/23![American Airlines logo]()
$1,297
This United Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 6/47:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Thu 6/1110:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 3/23![United Airlines logo]()
$1,381
This Delta deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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 4/199:59 am
STL
- SYD
2 stops29h 51m
Delta
Sun 4/269:15 am
SYD
- STL
2 stops26h 29m
Delta
Deal found 3/21![Delta logo]()
$1,393
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 5/710:25 am
STL
- MEL
2 stops30h 50m
United Airlines
Thu 5/1410:55 am
MEL
- STL
1 stop22h 27m
United Airlines
Deal found 3/22![United Airlines logo]()
$1,385
This lastminute.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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.
Tue 5/56:21 am
STL
- CNS
2 stops37h 54m
Multiple Airlines
Tue 5/129:10 pm
CNS
- STL
2 stops41h 49m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$1,472
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 5/137:00 am
STL
- MEL
2 stops33h 50m
Delta
Sun 8/1610:00 am
MEL
- STL
2 stops29h 36m
Delta
Deal found 3/23![Delta logo]()
$1,493
This oojo deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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 4/186:21 am
STL
- CNS
2 stops37h 14m
Qantas Airways
Sat 4/251:40 pm
CNS
- STL
2 stops49h 17m
Qantas Airways
Deal found 3/21![Qantas Airways logo]()
$1,647
This United Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 7/272:57 pm
STL
- MEL
2 stops25h 33m
United Airlines
Sat 8/810:55 am
MEL
- STL
2 stops25h 31m
United Airlines
Deal found 3/20![United Airlines logo]()
$1,386
This Qatar Airways deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 9/196:41 am
STL
- PER
2 stops46h 54m
Qatar Airways
Sun 10/1810:45 pm
PER
- STL
2 stops38h 14m
Qatar Airways
Deal found 3/22![Qatar Airways logo]()
$1,749
This lastminute.com deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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.
Thu 5/76:21 am
STL
- BNE
1 stop31h 39m
Multiple Airlines
Thu 5/148:15 am
BNE
- STL
2 stops24h 06m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$1,505
This United Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 4/267:05 pm
STL
- SYD
1 stop20h 50m
United Airlines
Sun 5/1010:20 am
SYD
- STL
1 stop23h 02m
United Airlines
Deal found 3/23![United Airlines logo]()
$1,388
This oojo deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 5/36:21 am
STL
- PER
2 stops40h 44m
Qantas Airways
Sun 5/1011:45 pm
PER
- STL
2 stops37h 14m
Qantas Airways
Deal found 3/19![Qantas Airways logo]()
$1,757
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 3/22![United Airlines logo]()
$1,388
This oojo deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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 5/56:21 am
STL
- HBA
2 stops44h 09m
Multiple Airlines
Tue 5/122:55 pm
HBA
- STL
2 stops48h 04m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$1,534
This Qantas Airways deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/293:38 pm
STL
- PER
2 stops30h 37m
Qantas Airways
Thu 8/2010:30 am
PER
- STL
2 stops25h 38m
Qantas Airways
Deal found 3/23![Qantas Airways logo]()
$1,817
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/214:30 pm
STL
- SYD
2 stops23h 30m
United Airlines
Tue 4/289:30 am
SYD
- STL
2 stops26h 24m
United Airlines
Deal found 3/22![United Airlines logo]()
$1,393
This Qatar Airways deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 9/129:46 am
STL
- PER
2 stops43h 49m
Qatar Airways
Wed 9/1610:45 pm
PER
- STL
2 stops37h 35m
Qatar Airways
Deal found 3/19![Qatar Airways logo]()
$2,070
This lastminute.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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.
Sun 5/36:21 am
STL
- CNS
2 stops59h 59m
Multiple Airlines
Sun 5/109:40 pm
CNS
- STL
2 stops36h 50m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$1,560
This KAYAK deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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.
Tue 9/88:30 pm
STL
- BNE
2 stops43h 00m
Multiple Airlines
Mon 9/2810:30 am
BNE
- STL
1 stop22h 23m
Multiple Airlines
Deal found 3/22![Multiple Airlines logo]()
$1,560
This oojo deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 9/116:30 am
STL
- AVV
2 stops40h 50m
Qantas Airways
Mon 9/218:55 pm
AVV
- STL
2 stops34h 47m
Qantas Airways
Deal found 3/19![Qantas Airways logo]()
$1,894
This United Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 5/132:35 pm
STL
- MEL
2 stops26h 40m
United Airlines
Tue 8/1110:55 am
MEL
- STL
1 stop22h 29m
United Airlines
Deal found 3/23![United Airlines logo]()
$1,467
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated March 24, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated March 24, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” 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 3/254:13 pm
STL
- SYD
1 stop22h 42m
Qantas Airways
Fri 10/307:40 pm
SYD
- STL
2 stops43h 25m
Qantas Airways
Deal found 3/18![Qantas Airways logo]()
$1,328
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 4/126:12 pm
STL
- MEL
2 stops46h 38m
Delta
Wed 5/610:00 am
MEL
- STL
2 stops22h 26m
Delta
Deal found 3/22![Delta logo]()
$1,410
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:25 am
STL
- MEL
2 stops33h 25m
Delta
Fri 5/810:00 am
MEL
- STL
2 stops24h 03m
Delta
Deal found 3/22![Delta logo]()
$1,393
This Kiwi.com deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/183:38 pm
STL
- MEL
1 stop22h 22m
Qantas Airways
Sat 5/99:45 am
MEL
- STL
1 stop29h 14m
Qantas Airways
Deal found 3/22![Qantas Airways logo]()
$1,397
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 4/196:00 am
STL
- SYD
2 stops33h 50m
Delta
Sun 4/269:15 am
SYD
- STL
2 stops22h 27m
Delta
Deal found 3/20![Delta logo]()
$1,393
This American Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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 4/194:30 pm
STL
- SYD
2 stops24h 00m
American Airlines
Sun 4/2612:00 pm
SYD
- STL
1 stop20h 21m
American Airlines
Deal found 3/21![American Airlines logo]()
$1,409
This Gurufare deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/218:54 am
STL
- SYD
2 stops31h 26m
Multiple Airlines
Tue 4/289:20 am
SYD
- STL
1 stop45h 05m
Multiple Airlines
Deal found 3/22![Multiple Airlines logo]()
$1,208
This oojo deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 4/216:11 pm
STL
- SYD
1 stop21h 44m
Qantas Airways
Tue 4/2812:00 pm
SYD
- STL
1 stop20h 21m
Qantas Airways
Deal found 3/22![Qantas Airways logo]()
$1,399
This Air Canada deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/254:05 pm
STL
- BNE
2 stops48h 00m
Air Canada
Wed 4/2910:00 am
BNE
- STL
2 stops49h 43m
Air Canada
Deal found 3/19![Air Canada logo]()
$1,369
This Air Canada deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 4/264:05 pm
STL
- SYD
2 stops48h 15m
Air Canada
Sun 5/109:20 am
SYD
- STL
2 stops26h 05m
Air Canada
Deal found 3/23![Air Canada logo]()
$1,179
This United Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 4/267:05 pm
STL
- SYD
1 stop20h 50m
United Airlines
Sun 5/1010:20 am
SYD
- STL
2 stops25h 23m
United Airlines
Deal found 3/23![United Airlines logo]()
$1,388
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:49 pm
STL
- MEL
2 stops24h 26m
United Airlines
Sun 7/510:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 3/22![United Airlines logo]()
$1,381
One-way flights from St. Louis to AustraliaSearch for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated March 24, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated March 24, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:51 pm
STL
- SYD
3 stops49h 59m
Multiple Airlines
Deal found 3/22![Multiple Airlines logo]()
$487
This Kiwi.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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 5/308:08 pm
STL
- SYD
3 stops48h 42m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$530
This Kiwi.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/56:51 pm
STL
- MEL
3 stops50h 14m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$553
This Air Canada deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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 5/51:05 pm
STL
- SYD
2 stops51h 15m
Air Canada
Deal found 3/21![Air Canada logo]()
$635
This Air Canada deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” 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 5/52:25 pm
STL
- AVV
3 stops34h 40m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$657
This Air Canada deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 6/77:05 am
STL
- AVV
3 stops40h 05m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$658
This Expedia deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/77:05 am
STL
- MEL
3 stops37h 00m
Air Canada
Deal found 3/20![Air Canada logo]()
$671
This Kiwi.com deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 8/217:32 pm
STL
- PER
3 stops47h 38m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$677
This Kiwi.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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 9/126:30 am
STL
- CNS
2 stops38h 10m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$695
This Gurufare deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:05 am
STL
- SYD
1 stop33h 15m
EVA Air
Deal found 3/21![EVA Air logo]()
$696
This Kiwi.com deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 5/238:08 pm
STL
- AVV
3 stops59h 42m
Multiple Airlines
Deal found 3/22![Multiple Airlines logo]()
$719
This Kiwi.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/88:08 pm
STL
- AVV
3 stops52h 57m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$751
Find flight deals from St. Louis to Australia
Keep the following information in mind while searching for St. Louis to Australia flight deals. Data was last updated March 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $963 (Air Canada) |
One-way from | $487 (Kiwi.com) |
Popular in | December |
Cheapest in | March |
Average price | $1,254 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 24, 2026.
Use the filters below to find and compare flights from St. Louis to Australia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Tue 5/5
1:05 pm-7:05 am
2 stops51h 00m
Brisbane
Tue 5/12
10:00 am-8:25 pm
2 stops49h 25m
$968
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Mon 5/4
1:05 pm-7:20 am
2 stops27h 15m
Sydney Kingsford Smith
Mon 5/18
9:20 am-8:25 pm
2 stops26h 05m
$1,194
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Sun 5/3
6:21 am-5:00 am
1 stop31h 39m
Brisbane
Sun 5/10
8:35 pm-8:54 am
2 stops27h 19m
$1,258
St. LouisMelbourne
STL - AVV
STLAVV
Lambert-St Louis
Fri 9/11
8:55 am-2:10 pm
3 stops38h 15m
Melbourne Avalon
Mon 9/21
8:55 pm-2:00 pm
3 stops56h 05m
$1,265
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Fri 9/11
8:55 am-11:05 am
3 stops35h 10m
Melbourne
Mon 9/21
8:50 pm-8:00 pm
3 stops38h 10m
$1,286
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Sat 6/27
9:41 am-5:00 am
2 stops28h 19m
Brisbane
Sun 7/5
8:35 pm-8:47 am
2 stops27h 12m
$1,297
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 4/28
4:49 pm-8:15 am
2 stops24h 26m
Melbourne
Sun 7/5
10:55 am-6:17 pm
1 stop22h 22m
$1,381
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Thu 6/4
7:23 pm-8:15 am
1 stop21h 52m
Melbourne
Thu 6/11
10:55 am-6:17 pm
1 stop22h 22m
$1,381
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Thu 5/7
10:25 am-8:15 am
2 stops30h 50m
Melbourne
Thu 5/14
10:55 am-6:22 pm
1 stop22h 27m
$1,385
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Mon 7/27
2:57 pm-7:30 am
2 stops25h 33m
Melbourne
Sat 8/8
10:55 am-9:26 pm
2 stops25h 31m
$1,386
Showing 1-10 of 49 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-AVV
STL-MEL
STL-PER
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-BNE
STL-AVV
STL-MEL
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 $649). Flying from St. Louis to Australia in June is currently the most expensive (average of $1,225). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing Australia
Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated March 24, 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
Overall
8.1
Boarding
8.2
Crew
8.5
Food
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Overall
8.1
Boarding
8.2
Crew
8.5
Food
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Overall
8.1
Boarding
8.2
Crew
8.5
Food
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Overall
8.1
Boarding
8.2
Crew
8.5
Food
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Overall
8.1
Boarding
8.2
Crew
8.5
Food
7.5
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Comfort
8.1
Entertainment
7.5
Overall
8.1
Boarding
8.2
Crew
8.5
Food
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 March 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Fly to Australia regions
Consider these flights traveling to Australia regions.
Top 5 airlines flying from St. Louis to Australia
Discover the top 5 airlines that operate flights from St. Louis to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| 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$1,370 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,132 | Average$1,268 | FlexibilityNo cancel fee | On-time74% |