$625+ Cheap flights from St. Louis (STL) to Australia
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Aug 16 — Aug 231
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 July 17, 2026.
Explore the most affordable flight options available from St. Louis to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 17, 2026.
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Sun 8/210:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,179
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/303:13 pm
STL
- SYD
2 stops24h 42m
United Airlines
Tue 10/1311:20 am
SYD
- STL
2 stops21h 17m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,181
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/308:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Wed 9/309:30 am
SYD
- STL
2 stops24h 13m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,186
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Wed 8/2610:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 7/17![United Airlines logo]()
$1,187
This American Airlines deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2710:22 am
STL
- MEL
2 stops26h 38m
American Airlines
Wed 11/1110:45 pm
MEL
- STL
2 stops27h 13m
American Airlines
Deal found 7/13![American Airlines logo]()
$1,193
This American Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:04 am
STL
- MEL
1 stop32h 41m
American Airlines
Tue 11/312:00 pm
MEL
- STL
1 stop27h 29m
American Airlines
Deal found 7/16![American Airlines logo]()
$1,198
This oojo deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” 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 10/307:10 pm
STL
- BNE
1 stop20h 20m
Qantas Airways
Sat 11/149:40 am
BNE
- STL
1 stop23h 00m
Qantas Airways
Deal found 7/12![Qantas Airways logo]()
$1,209
This Delta deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:20 pm
STL
- MEL
2 stops45h 30m
Delta
Tue 11/312:00 pm
MEL
- STL
2 stops29h 34m
Delta
Deal found 7/13![Delta logo]()
$1,211
This Delta deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 10/257:55 am
STL
- MEL
2 stops32h 55m
Delta
Wed 11/1112:00 pm
MEL
- STL
2 stops23h 56m
Delta
Deal found 7/17![Delta logo]()
$1,212
This Qantas Airways deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” 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 10/307:10 pm
STL
- BNE
2 stops31h 05m
Multiple Airlines
Sat 11/141:10 pm
BNE
- STL
2 stops22h 20m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$1,214
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:29 pm
STL
- MEL
2 stops27h 46m
United Airlines
Tue 11/312:45 pm
MEL
- STL
1 stop26h 25m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,215
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:40 pm
STL
- MEL
2 stops24h 50m
United Airlines
Wed 11/1111:30 am
MEL
- STL
2 stops22h 13m
United Airlines
Deal found 7/17![United Airlines logo]()
$1,216
Best flights from St. Louis to AustraliaDiscover carefully curated flight deals from St. Louis to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 17, 2026.
Discover carefully curated flight deals from St. Louis to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 17, 2026.
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:05 pm
STL
- MEL
1 stop22h 25m
United Airlines
Wed 11/1112:45 pm
MEL
- STL
1 stop26h 25m
United Airlines
Deal found 7/14![United Airlines logo]()
$1,211
This Delta deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:20 pm
STL
- MEL
2 stops45h 30m
Delta
Tue 11/312:00 pm
MEL
- STL
2 stops25h 41m
Delta
Deal found 7/14![Delta logo]()
$1,211
This Qantas Airways deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/141:20 pm
STL
- MEL
1 stop22h 40m
Qantas Airways
Wed 11/1810:15 am
MEL
- STL
2 stops30h 27m
Qantas Airways
Deal found 7/12![Qantas Airways logo]()
$1,317
This FlightHub deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:10 pm
STL
- BNE
2 stops51h 55m
Air Canada
Mon 8/3110:00 am
BNE
- STL
2 stops41h 40m
Air Canada
Deal found 7/16![Air Canada logo]()
$1,393
This oojo deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” 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 8/276:00 am
STL
- HBA
2 stops45h 50m
Multiple Airlines
Thu 9/36:10 pm
HBA
- STL
2 stops43h 49m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$1,429
This American Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:11 pm
STL
- PER
2 stops29h 04m
American Airlines
Tue 8/1811:45 pm
PER
- STL
2 stops33h 41m
American Airlines
Deal found 7/14![American Airlines logo]()
$1,503
This Qatar Airways deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” 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 9/76:35 am
STL
- BNE
2 stops43h 55m
Qatar Airways
Sun 9/1310:10 pm
BNE
- STL
2 stops40h 49m
Qatar Airways
Deal found 7/13![Qatar Airways logo]()
$1,602
This Turkish Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” 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.
Mon 8/318:00 am
STL
- SYD
3 stops44h 10m
Turkish Airlines
Sun 9/279:05 pm
SYD
- STL
3 stops39h 16m
Turkish Airlines
Deal found 7/15![Turkish Airlines logo]()
$1,845
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:29 pm
STL
- MEL
2 stops27h 46m
United Airlines
Tue 11/312:45 pm
MEL
- STL
1 stop26h 25m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,215
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/143:13 pm
STL
- MEL
2 stops25h 17m
United Airlines
Fri 8/2110:55 am
MEL
- STL
2 stops24h 51m
United Airlines
Deal found 7/16![United Airlines logo]()
$1,216
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 9/63:29 pm
STL
- SYD
2 stops24h 21m
Delta
Sat 10/39:15 am
SYD
- STL
2 stops22h 32m
Delta
Deal found 7/16![Delta logo]()
$1,361
This Air Canada deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:05 pm
STL
- AVV
3 stops63h 10m
Multiple Airlines
Wed 11/116:00 am
AVV
- STL
3 stops50h 26m
Multiple Airlines
Deal found 7/17![Multiple Airlines logo]()
$1,440
This oojo deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:00 am
STL
- CBR
2 stops38h 05m
Qantas Airways
Fri 8/213:25 pm
CBR
- STL
2 stops22h 34m
Qantas Airways
Deal found 7/17![Qantas Airways logo]()
$1,495
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/257:05 pm
STL
- MEL
1 stop22h 25m
United Airlines
Sat 11/1412:45 pm
MEL
- STL
1 stop22h 18m
United Airlines
Deal found 7/17![United Airlines logo]()
$1,262
This Air Canada deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” 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 8/2612:10 pm
STL
- BNE
2 stops27h 55m
Air Canada
Wed 9/210:00 am
BNE
- STL
2 stops23h 42m
Air Canada
Deal found 7/12![Air Canada logo]()
$1,530
This Qatar Airways deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” 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.
Sun 9/66:35 am
STL
- BNE
2 stops43h 55m
Qatar Airways
Thu 9/1010:10 pm
BNE
- STL
2 stops59h 57m
Qatar Airways
Deal found 7/13![Qatar Airways logo]()
$1,609
This Air Canada deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/318:55 am
STL
- AVV
3 stops38h 15m
Multiple Airlines
Wed 9/98:55 pm
AVV
- STL
3 stops56h 05m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$1,477
This Qantas Airways deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 9/26:00 am
STL
- SYD
1 stop34h 05m
Qantas Airways
Thu 10/110:30 am
SYD
- STL
2 stops52h 00m
Qantas Airways
Deal found 7/16![Qantas Airways logo]()
$1,500
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/291:36 pm
STL
- SYD
2 stops26h 19m
United Airlines
Fri 9/2510:20 am
SYD
- STL
1 stop23h 23m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,282
This Ovago deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:01 pm
STL
- BNE
2 stops45h 04m
Multiple Airlines
Sat 10/107:40 pm
BNE
- STL
2 stops39h 20m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$1,496
This Qantas Airways deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” 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 8/306:45 pm
STL
- BNE
2 stops25h 45m
Qantas Airways
Sun 4/47:40 pm
BNE
- STL
2 stops43h 19m
Qantas Airways
Deal found 7/15![Qantas Airways logo]()
$1,572
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 9/63:32 pm
STL
- SYD
2 stops24h 23m
United Airlines
Tue 10/611:20 am
SYD
- STL
2 stops21h 17m
United Airlines
Deal found 7/16![United Airlines logo]()
$1,300
This Air Canada deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:40 pm
STL
- AVV
3 stops33h 25m
Multiple Airlines
Tue 11/36:00 am
AVV
- STL
3 stops50h 26m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$1,526
This Turkish Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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.
Mon 9/78:00 am
STL
- SYD
3 stops44h 10m
Turkish Airlines
Tue 10/610:05 pm
SYD
- STL
3 stops39h 16m
Turkish Airlines
Deal found 7/16![Turkish Airlines logo]()
$2,045
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/23:32 pm
STL
- SYD
2 stops24h 28m
United Airlines
Tue 9/299:30 am
SYD
- STL
2 stops23h 46m
United Airlines
Deal found 7/16![United Airlines logo]()
$1,306
This Qantas Airways deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:00 am
STL
- BNE
2 stops41h 35m
Qantas Airways
Sun 4/47:40 pm
BNE
- STL
2 stops43h 19m
Qantas Airways
Deal found 7/15![Qantas Airways logo]()
$1,584
This Qatar Airways deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:29 am
STL
- PER
2 stops47h 06m
Qatar Airways
Mon 9/1410:45 pm
PER
- STL
2 stops33h 22m
Qatar Airways
Deal found 7/12![Qatar Airways logo]()
$1,925
This Booking.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:40 pm
STL
- PER
3 stops34h 05m
Air Canada
Tue 8/185:15 pm
PER
- STL
3 stops36h 19m
Air Canada
Deal found 7/14![Air Canada logo]()
$2,010
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 9/68:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Mon 10/511:20 am
SYD
- STL
1 stop23h 23m
United Airlines
Deal found 7/16![United Airlines logo]()
$1,307
This Turkish Airlines deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” 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 11/147:33 am
STL
- MEL
3 stops44h 07m
Turkish Airlines
Wed 11/1810:35 pm
MEL
- STL
3 stops58h 06m
Turkish Airlines
Deal found 7/13![Turkish Airlines logo]()
$2,133
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated July 17, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated July 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Sun 8/210:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,179
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:01 am
STL
- SYD
2 stops33h 54m
United Airlines
Sun 8/2310:20 am
SYD
- STL
1 stop22h 39m
United Airlines
Deal found 7/14![United Airlines logo]()
$1,237
This American Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” 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 8/16:37 am
STL
- SYD
1 stop33h 28m
American Airlines
Sun 8/235:50 pm
SYD
- STL
1 stop20h 09m
American Airlines
Deal found 7/14![American Airlines logo]()
$1,263
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Wed 8/2610:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 7/17![United Airlines logo]()
$1,187
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/123:13 pm
STL
- MEL
2 stops26h 02m
United Airlines
Tue 8/1810:00 am
MEL
- STL
2 stops47h 39m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,229
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/143:13 pm
STL
- MEL
2 stops25h 17m
United Airlines
Fri 8/2110:55 am
MEL
- STL
1 stop22h 44m
United Airlines
Deal found 7/17![United Airlines logo]()
$1,212
This United Airlines deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” 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 8/276:59 pm
STL
- MEL
2 stops45h 31m
United Airlines
Thu 9/310:00 am
MEL
- STL
2 stops47h 39m
United Airlines
Deal found 7/12![United Airlines logo]()
$1,240
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/284:40 pm
STL
- SYD
2 stops23h 20m
United Airlines
Tue 9/2910:20 am
SYD
- STL
2 stops21h 17m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,232
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/288:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Sun 9/2710:20 am
SYD
- STL
1 stop23h 23m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,236
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/303:13 pm
STL
- SYD
2 stops24h 47m
United Airlines
Mon 10/1211:20 am
SYD
- STL
2 stops21h 17m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,181
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/308:42 am
STL
- SYD
1 stop31h 13m
United Airlines
Wed 9/309:30 am
SYD
- STL
2 stops24h 13m
United Airlines
Deal found 7/15![United Airlines logo]()
$1,186
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 8/313:50 pm
STL
- MEL
2 stops25h 00m
Delta
Wed 9/910:00 am
MEL
- STL
2 stops25h 35m
Delta
Deal found 7/16![Delta logo]()
$1,211
One-way flights from St. Louis to AustraliaSearch for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated July 17, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated July 17, 2026.
This American Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/141:06 pm
STL
- MEL
2 stops25h 39m
American Airlines
Deal found 7/15![American Airlines logo]()
$625
This Delta deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” 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 8/99:15 am
STL
- SYD
2 stops30h 35m
Delta
Deal found 7/13![Delta logo]()
$625
This oojo deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” 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 10/146:04 am
STL
- MEL
1 stop32h 41m
Qantas Airways
Deal found 7/16![Qantas Airways logo]()
$628
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:27 am
STL
- MEL
2 stops30h 48m
United Airlines
Deal found 7/17![United Airlines logo]()
$636
This Delta deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:20 pm
STL
- MEL
2 stops45h 30m
Delta
Deal found 7/15![Delta logo]()
$643
This Kiwi.com deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” 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 10/138:10 pm
STL
- MEL
3 stops43h 20m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$676
This Kiwi.com deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” 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 10/135:19 pm
STL
- SYD
2 stops33h 31m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$678
This oojo deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” 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 10/136:04 am
STL
- SYD
1 stop34h 01m
Qantas Airways
Deal found 7/12![Qantas Airways logo]()
$693
This Kiwi.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:10 pm
STL
- SYD
3 stops57h 00m
Multiple Airlines
Deal found 7/13![Multiple Airlines logo]()
$722
This Kiwi.com deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” 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 10/135:19 pm
STL
- AVV
3 stops37h 31m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$745
This Kiwi.com deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” 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 12/127:00 am
STL
- MEL
2 stops33h 30m
Multiple Airlines
Deal found 7/12![Multiple Airlines logo]()
$748
This Kiwi.com deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” 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 10/148:10 pm
STL
- AVV
3 stops58h 40m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$757
Find flight deals from St. Louis to Australia
Keep the following information in mind while searching for St. Louis to Australia flight deals. Data was last updated July 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,181 (United Airlines) |
One-way from | $625 (American Airlines) |
Popular in | December |
Cheapest in | July |
Average price | $1,161 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 17, 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
Tue 10/27
7:05 pm-9:30 am
1 stop22h 25m
Melbourne
Wed 11/11
12:45 pm-10:10 pm
1 stop26h 25m
$1,211
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/20
7:20 pm-8:50 am
2 stops45h 30m
Melbourne
Tue 11/3
12:00 pm-8:41 pm
2 stops25h 41m
$1,211
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Tue 10/20
1:29 pm-9:15 am
2 stops27h 46m
Melbourne
Tue 11/3
12:45 pm-10:10 pm
1 stop26h 25m
$1,215
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Fri 8/14
3:13 pm-7:30 am
2 stops25h 17m
Melbourne
Fri 8/21
10:55 am-8:46 pm
2 stops24h 51m
$1,216
Quickest round-trip
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sun 10/25
7:05 pm-9:30 am
1 stop22h 25m
Melbourne
Sat 11/14
12:45 pm-6:03 pm
1 stop22h 18m
$1,262
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sat 8/29
1:36 pm-6:55 am
2 stops26h 19m
Sydney Kingsford Smith
Fri 9/25
10:20 am-6:43 pm
1 stop23h 23m
$1,282
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sun 9/6
3:32 pm-6:55 am
2 stops24h 23m
Sydney Kingsford Smith
Tue 10/6
11:20 am-4:37 pm
2 stops21h 17m
$1,300
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 9/2
3:32 pm-7:00 am
2 stops24h 28m
Sydney Kingsford Smith
Tue 9/29
9:30 am-6:16 pm
2 stops23h 46m
$1,306
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sun 9/6
8:42 am-6:55 am
1 stop31h 13m
Sydney Kingsford Smith
Mon 10/5
11:20 am-6:43 pm
1 stop23h 23m
$1,307
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sat 11/14
1:20 pm-5:00 am
1 stop22h 40m
Melbourne
Wed 11/18
10:15 am-11:42 pm
2 stops30h 27m
$1,317
Showing 1-10 of 52 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Australia
Have a flexible travel schedule? Discover the best time to fly to Australia from St. Louis with our price prediction graph.
STL-SYD
STL-MEL
STL-BNE
STL-AVV
STL-HBA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Australia
STL-AU0
STL-SYD
STL-MEL
STL-BNE
STL-AVV
What is the cheapest month to book a flight from St. Louis to Australia?
Currently, May is the cheapest month in which you can book a flight from St. Louis to Australia (average of $310). Flying from St. Louis to Australia in June is currently the most expensive (average of $1,225). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing Australia
Get insights into the airlines that provide service to Australia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Australia. Reviews last updated July 17, 2026.
Read reviews from past customers who have flown Fiji Airways,Qantas Airways, andUnited Airlines from St. Louis to Australia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Crew
8.5
Overall
8.0
Comfort
8.0
Food
7.5
Boarding
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Crew
8.5
Overall
8.0
Comfort
8.0
Food
7.5
Boarding
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Crew
8.5
Overall
8.0
Comfort
8.0
Food
7.5
Boarding
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Crew
8.5
Overall
8.0
Comfort
8.0
Food
7.5
Boarding
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Crew
8.5
Overall
8.0
Comfort
8.0
Food
7.5
Boarding
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Entertainment
7.5
Crew
8.5
Overall
8.0
Comfort
8.0
Food
7.5
Boarding
8.1
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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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 July 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Fly to Australia regions
Consider these flights traveling to Australia regions.
Top 5 airlines flying from St. Louis to Australia
Discover the top 5 airlines that operate flights from St. Louis to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$857 | Average$1,361 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,029 | Average$1,398 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,361 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$1,265 | Average$1,291 | FlexibilityNo cancel fee | On-time74% |