$607+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Oct 17 — Oct 241
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Australia with Cheapflights
1. Tell us where you want to go
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Australia
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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 September 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 September 17, 2026.
This American Airlines deal was found by Cheapflights users on 9/16. 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 10/2711:32 am -
2 stops25h 28m
Wed 11/1110:45 pm -
2 stops26h 22m
Deal found 9/16![American Airlines logo]()
$1,146
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/211:36 pm -
2 stops26h 54m
Wed 10/2811:45 am -
1 stop22h 20m
Deal found 9/15![United Airlines logo]()
$1,165
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/204:39 pm -
2 stops24h 36m
Wed 11/411:30 am -
2 stops24h 08m
Deal found 9/15![United Airlines logo]()
$1,169
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/201:29 pm -
2 stops27h 46m
Tue 11/312:45 pm -
2 stops25h 14m
Deal found 9/14![United Airlines logo]()
$1,170
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/154:39 pm -
2 stops24h 51m
Sun 11/2211:30 am -
2 stops23h 35m
Deal found 9/15![United Airlines logo]()
$1,215
This FlightHub deal was found by Cheapflights users on 9/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:15 am -
2 stops33h 20m
Thu 11/199:55 am -
2 stops29h 30m
Deal found 9/15![Air New Zealand logo]()
$1,285
This Air Canada deal was found by Cheapflights users on 9/13. 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.
Wed 10/284:39 pm -
2 stops24h 06m
Wed 11/410:45 am -
2 stops44h 41m
Deal found 9/13![Multiple Airlines logo]()
$1,294
This FlightHub deal was found by Cheapflights users on 9/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/911:00 am -
2 stops28h 35m
Tue 11/247:25 pm -
2 stops43h 50m
Deal found 9/13![Air New Zealand logo]()
$1,305
This FlightHub deal was found by Cheapflights users on 9/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/156:15 am -
2 stops35h 40m
Thu 11/1912:10 pm -
2 stops27h 15m
Deal found 9/15![Air New Zealand logo]()
$1,313
This Qantas Airways deal was found by Cheapflights users on 9/16. 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.
Sat 10/313:20 pm -
1 stop23h 35m
Sat 11/711:05 am -
2 stops26h 37m
Deal found 9/16![Qantas Airways logo]()
$1,318
This Qantas Airways deal was found by Cheapflights users on 9/15. 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.
Fri 10/303:20 pm -
1 stop23h 35m
Fri 11/611:05 am -
2 stops26h 37m
Deal found 9/15![Qantas Airways logo]()
$1,319
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/144:39 pm -
2 stops23h 21m
Tue 10/2710:20 am -
2 stops23h 45m
Deal found 9/16![United Airlines logo]()
$1,329
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 September 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 September 17, 2026.
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/204:39 pm -
2 stops24h 36m
Wed 11/411:30 am -
2 stops24h 08m
Deal found 9/15![United Airlines logo]()
$1,169
This Air Canada deal was found by Cheapflights users on 9/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/224:05 pm -
3 stops54h 30m
Mon 3/88:55 pm -
3 stops59h 31m
Deal found 9/15![Multiple Airlines logo]()
$1,335
This Qantas Airways deal was found by Cheapflights users on 9/16. 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.
Mon 2/85:18 pm -
1 stop21h 12m
Fri 2/121:10 pm -
1 stop26h 38m
Deal found 9/16![Qantas Airways logo]()
$1,345
This Expedia deal was found by Cheapflights users on 9/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:00 am -
3 stops34h 35m
Tue 11/2411:20 am -
2 stops45h 06m
Deal found 9/13![Air Canada logo]()
$1,380
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Thu 10/297:10 pm -
2 stops27h 20m
Thu 11/56:20 am -
2 stops23h 08m
Deal found 9/14![American Airlines logo]()
$1,540
This Qatar Airways deal was found by Cheapflights users on 9/12. 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.
Mon 11/911:35 am -
2 stops41h 10m
Fri 11/1310:45 pm -
2 stops37h 39m
Deal found 9/12![Qatar Airways logo]()
$1,939
This United Airlines deal was found by Cheapflights users on 9/15. 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 2/267:06 pm -
1 stop22h 24m
Mon 3/812:45 pm -
1 stop22h 08m
Deal found 9/15![United Airlines logo]()
$1,215
This Air Canada deal was found by Cheapflights users on 9/17. 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 -
3 stops51h 35m
Wed 11/117:45 am -
3 stops48h 41m
Deal found 9/17![Multiple Airlines logo]()
$1,351
This Qantas Airways deal was found by Cheapflights users on 9/16. 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.
Mon 2/85:18 pm -
1 stop42h 42m
Fri 2/1210:20 am -
2 stops30h 28m
Deal found 9/16![Qantas Airways logo]()
$1,380
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/144:39 pm -
2 stops23h 21m
Tue 10/2710:20 am -
2 stops23h 45m
Deal found 9/16![United Airlines logo]()
$1,329
This Air Canada deal was found by Cheapflights users on 9/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/264:05 pm -
3 stops54h 30m
Mon 3/86:00 am -
3 stops50h 26m
Deal found 9/15![Multiple Airlines logo]()
$1,372
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Wed 10/284:39 pm -
2 stops23h 26m
Wed 11/411:20 am -
2 stops23h 45m
Deal found 9/12![United Airlines logo]()
$1,330
This oojo deal was found by Cheapflights users on 9/16. 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.
Sat 10/316:04 am -
2 stops38h 26m
Sat 11/712:35 pm -
2 stops46h 41m
Deal found 9/16![Qantas Airways logo]()
$1,540
This Air New Zealand deal was found by Cheapflights users on 9/15. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/158:50 am -
3 stops31h 05m
Sun 11/2212:10 pm -
2 stops27h 05m
Deal found 9/15![Multiple Airlines logo]()
$1,418
This Air Canada deal was found by Cheapflights users on 9/16. 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.
Sat 2/134:05 pm -
3 stops54h 50m
Wed 2/173:45 pm -
3 stops63h 41m
Deal found 9/16![Air Canada logo]()
$1,757
This United Airlines deal was found by Cheapflights users on 9/16. 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 12/96:30 am -
2 stops33h 50m
Fri 1/811:20 am -
2 stops27h 53m
Deal found 9/16![United Airlines logo]()
$1,399
This Air New Zealand deal was found by Cheapflights users on 9/15. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:08 pm -
3 stops27h 27m
Fri 11/62:05 pm -
3 stops26h 19m
Deal found 9/15![Multiple Airlines logo]()
$1,436
This Qantas Airways deal was found by Cheapflights users on 9/16. 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.
Sat 2/132:54 pm -
2 stops36h 21m
Wed 2/179:15 am -
2 stops30h 33m
Deal found 9/16![Qantas Airways logo]()
$1,599
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Mon 2/88:30 am -
1 stop31h 00m
Fri 2/1211:20 am -
1 stop22h 33m
Deal found 9/14![United Airlines logo]()
$1,423
This Air Canada deal was found by Cheapflights users on 9/16. 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.
Sat 10/314:05 pm -
3 stops55h 10m
Sat 11/77:25 am -
3 stops49h 01m
Deal found 9/16![Multiple Airlines logo]()
$1,449
This Qantas Airways deal was found by Cheapflights users on 9/15. 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.
Sat 11/76:44 pm -
2 stops30h 06m
Wed 11/113:40 pm -
2 stops45h 02m
Deal found 9/15![Qantas Airways logo]()
$1,600
This Qatar Airways deal was found by Cheapflights users on 9/15. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/89:50 am -
2 stops40h 30m
Wed 11/1110:10 pm -
2 stops40h 37m
Deal found 9/15![Qatar Airways logo]()
$2,172
This Air Canada deal was found by Cheapflights users on 9/16. 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 11/94:05 pm -
3 stops62h 15m
Fri 11/1310:55 pm -
3 stops54h 31m
Deal found 9/16![Air Canada logo]()
$2,015
This Air Canada deal was found by Cheapflights users on 9/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/294:05 pm -
3 stops53h 00m
Thu 11/57:55 am -
3 stops48h 31m
Deal found 9/14![Multiple Airlines logo]()
$1,464
This Qantas Airways deal was found by Cheapflights users on 9/15. 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 2/85:18 pm -
2 stops26h 07m
Fri 2/121:05 pm -
2 stops51h 43m
Deal found 9/15![Qantas Airways logo]()
$1,670
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Thu 10/297:05 pm -
2 stops24h 35m
Thu 11/56:05 am -
3 stops29h 00m
Deal found 9/14![United Airlines logo]()
$1,550
This Cathay Pacific deal was found by Cheapflights users on 9/13. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2810:12 am -
2 stops47h 43m
Wed 11/48:30 am -
2 stops46h 13m
Deal found 9/13![Multiple Airlines logo]()
$1,496
This Qantas Airways deal was found by Cheapflights users on 9/13. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/82:54 pm -
1 stop23h 01m
Wed 11/119:55 am -
2 stops27h 47m
Deal found 9/13![Qantas Airways logo]()
$1,675
This United Airlines deal was found by Cheapflights users on 9/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:00 am -
2 stops31h 55m
Sun 10/1811:20 am -
1 stop23h 23m
Deal found 9/13![United Airlines logo]()
$1,565
This Cathay Pacific deal was found by Cheapflights users on 9/12. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:29 pm -
2 stops47h 26m
Mon 11/168:30 am -
2 stops47h 47m
Deal found 9/12![Multiple Airlines logo]()
$1,501
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated September 17, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated September 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Tue 10/1311:10 am -
2 stops28h 45m
Wed 11/189:15 am -
1 stop21h 58m
Deal found 9/12![United Airlines logo]()
$1,335
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/144:39 pm -
2 stops23h 21m
Tue 10/2711:50 am -
1 stop22h 15m
Deal found 9/16![United Airlines logo]()
$1,329
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/203:12 pm -
2 stops26h 03m
Wed 11/412:45 pm -
1 stop22h 20m
Deal found 9/15![United Airlines logo]()
$1,169
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/201:29 pm -
2 stops27h 46m
Tue 11/312:45 pm -
2 stops25h 14m
Deal found 9/14![United Airlines logo]()
$1,170
This Air Canada deal was found by Cheapflights users on 9/17. 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 10/202:40 pm -
3 stops29h 25m
Tue 11/38:00 am -
3 stops48h 26m
Deal found 9/17![Multiple Airlines logo]()
$1,351
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/211:36 pm -
2 stops26h 54m
Wed 10/2811:45 am -
1 stop22h 20m
Deal found 9/15![United Airlines logo]()
$1,165
This American Airlines deal was found by Cheapflights users on 9/16. 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 10/275:40 am -
1 stop31h 20m
Wed 11/1110:45 pm -
2 stops26h 22m
Deal found 9/16![American Airlines logo]()
$1,146
This Air Canada deal was found by Cheapflights users on 9/16. 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.
Tue 10/274:05 pm -
3 stops51h 35m
Wed 11/117:45 am -
3 stops48h 41m
Deal found 9/16![Multiple Airlines logo]()
$1,352
This Air Canada deal was found by Cheapflights users on 9/13. 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.
Wed 10/284:39 pm -
2 stops24h 06m
Wed 11/410:45 am -
2 stops44h 41m
Deal found 9/13![Multiple Airlines logo]()
$1,294
This United Airlines deal was found by Cheapflights users on 9/12. 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.
Wed 10/285:55 pm -
1 stop21h 05m
Wed 11/49:15 am -
1 stop24h 35m
Deal found 9/12![United Airlines logo]()
$1,330
This Qantas Airways deal was found by Cheapflights users on 9/15. 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.
Fri 10/303:20 pm -
1 stop23h 35m
Fri 11/611:05 am -
2 stops26h 37m
Deal found 9/15![Qantas Airways logo]()
$1,319
This Qantas Airways deal was found by Cheapflights users on 9/16. 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.
Sat 10/313:20 pm -
1 stop23h 35m
Sat 11/711:05 am -
2 stops26h 37m
Deal found 9/16![Qantas Airways logo]()
$1,318
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 September 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 September 17, 2026.
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 10/1411:10 am -
2 stops30h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![United Airlines logo]()
$607
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:18 pm -
2 stops46h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$650
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:59 pm -
2 stops41h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$652
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/307:59 pm -
2 stops42h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$655
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2912:14 pm -
2 stops50h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$686
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/137:08 am -
1 stop32h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![United Airlines logo]()
$707
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 10/2811:00 am -
1 stop28h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![United Airlines logo]()
$708
This Delta deal was found by Cheapflights users on 9/14. 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 9/297:05 am -
2 stops32h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Delta logo]()
$721
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/147:08 am -
1 stop32h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![United Airlines logo]()
$725
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Mon 10/127:08 am -
1 stop32h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![United Airlines logo]()
$726
This Delta deal was found by Cheapflights users on 9/16. 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.
Wed 9/302:25 pm -
2 stops25h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Delta logo]()
$728
This SmartFares deal was found by Cheapflights users on 9/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:00 am -
2 stops50h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$741
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 September 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,146 (American Airlines) |
One-way from | $607 (United Airlines) |
Popular in | December |
Cheapest in | July |
Average price | $1,373 |
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 7,457,451 searches. Data last updated September 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 Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Wed 10/14
11:10 am-9:15 am
2 stops30h 05m
Melbourne
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$607
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Tue 11/3
8:50 am-7:00 am
2 stops29h 10m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$708
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Tue 9/29
7:05 am-6:50 am
2 stops32h 45m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$721
St. LouisPerth
STL Lambert-St Louis - PER Perth
STLPER
Lambert-St Louis
Tue 11/3
6:00 am-10:55 pm
2 stops50h 55m
Perth
Wed 12/31
12:00 am-10:00 am
Nonstop0h 00m
$741
Quickest round-trip
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Fri 10/30
7:05 pm-9:20 am
1 stop22h 15m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$768
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Sat 10/31
7:05 pm-9:20 am
1 stop22h 15m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$768
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 9/30
11:01 am-11:45 am
2 stops33h 44m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$770
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Thu 10/15
6:04 am-8:05 am
1 stop34h 01m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$791
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 10/14
11:10 am-7:55 am
2 stops28h 45m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$791
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Tue 10/13
11:10 am-7:55 am
2 stops28h 45m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$791
Showing 1-10 of 53 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-MEL
STL-SYD
STL-BNE
STL-AVV
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-MEL
STL-SYD
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 $975). Flying from St. Louis to Australia in December is currently the most expensive (average of $1,599). 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 September 17, 2026.
Read reviews from past customers who have flown Qantas Airways,United Airlines, andAmerican 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.
Food
7.0
Comfort
7.4
Crew
8.1
Entertainment
7.2
Overall
7.5
Boarding
7.7
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Food
7.0
Comfort
7.4
Crew
8.1
Entertainment
7.2
Overall
7.5
Boarding
7.7
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Food
7.0
Comfort
7.4
Crew
8.1
Entertainment
7.2
Overall
7.5
Boarding
7.7
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Food
7.0
Comfort
7.4
Crew
8.1
Entertainment
7.2
Overall
7.5
Boarding
7.7
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Food
7.0
Comfort
7.4
Crew
8.1
Entertainment
7.2
Overall
7.5
Boarding
7.7
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for St. Louis to Australia
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Australia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Australia by cabin class
Find flights from St. Louis to Australia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Australia flights
Browse other St. Louis and Australia flight options. Last updated on September 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 4 airlines flying from St. Louis to Australia
Discover the top 4 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 7,457,451 searches. Data last updated September 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$857 | Average$1,493 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,029 | Average$1,357 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,233 | Average$1,549 | FlexibilityNo cancel fee | On-time71% |