$642+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Sep 11 — Sep 181
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
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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 August 12, 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 August 12, 2026.
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” 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 8/11![American Airlines logo]()
$1,244
This oojo deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” 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 10/2011:10 am -
2 stops31h 45m
Tue 11/38:15 am -
2 stops31h 11m
Deal found 8/11![Air New Zealand logo]()
$1,252
This FlightHub deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” 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 10/262:55 pm -
2 stops27h 40m
Sat 11/147:25 pm -
2 stops44h 01m
Deal found 8/9![Air New Zealand logo]()
$1,255
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:20 pm -
2 stops45h 30m
Tue 11/312:00 pm -
2 stops26h 25m
Deal found 8/7![Delta logo]()
$1,262
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:10 am -
2 stops30h 05m
Tue 11/312:45 pm -
1 stop22h 20m
Deal found 8/7![United Airlines logo]()
$1,267
This FlightHub deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” 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.
Tue 10/133:12 pm -
2 stops25h 33m
Fri 11/139:55 am -
2 stops29h 31m
Deal found 8/10![Air New Zealand logo]()
$1,283
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:59 pm -
2 stops27h 31m
Sat 10/2411:10 am -
2 stops46h 55m
Deal found 8/7![United Airlines logo]()
$1,284
This American Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:34 pm -
1 stop22h 26m
Sat 10/242:35 pm -
1 stop25h 07m
Deal found 8/7![American Airlines logo]()
$1,290
This oojo deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” 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 9/235:00 pm -
1 stop22h 55m
Wed 10/71:00 pm -
1 stop21h 20m
Deal found 8/11![Qantas Airways logo]()
$1,312
This United Airlines deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:05 pm -
2 stops45h 35m
Wed 11/189:15 am -
1 stop26h 23m
Deal found 8/6![United Airlines logo]()
$1,320
This Air Canada deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” 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 9/2312:10 pm -
2 stops27h 55m
Wed 9/3010:00 am -
2 stops23h 41m
Deal found 8/10![Air Canada logo]()
$1,326
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” 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 9/78:42 am -
1 stop31h 13m
Sun 9/2710:20 am -
1 stop23h 23m
Deal found 8/10![United Airlines logo]()
$1,328
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 August 12, 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 August 12, 2026.
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:20 pm -
2 stops45h 30m
Tue 11/312:00 pm -
2 stops26h 25m
Deal found 8/7![Delta logo]()
$1,262
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” 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 9/81:36 pm -
2 stops27h 39m
Mon 9/2810:55 am -
1 stop22h 48m
Deal found 8/9![United Airlines logo]()
$1,263
This American Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:30 am -
1 stop29h 30m
Sat 10/242:35 pm -
2 stops25h 34m
Deal found 8/7![American Airlines logo]()
$1,294
This Air Canada deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:05 pm -
3 stops63h 10m
Wed 11/116:00 am -
3 stops50h 26m
Deal found 8/7![Multiple Airlines logo]()
$1,372
This Air Canada deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 stops30h 25m
Tue 11/38:00 am -
3 stops48h 26m
Deal found 8/8![Air Canada logo]()
$1,389
This Cathay Pacific deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” 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.
Thu 10/226:04 am -
2 stops35h 46m
Mon 10/268:30 am -
2 stops46h 46m
Deal found 8/10![Cathay Pacific logo]()
$1,584
This oojo deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” 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 9/256:30 am -
2 stops37h 35m
Fri 10/26:55 pm -
2 stops43h 35m
Deal found 8/11![Qantas Airways logo]()
$1,630
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” 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 10/2011:10 am -
2 stops30h 05m
Tue 11/312:45 pm -
1 stop22h 20m
Deal found 8/9![United Airlines logo]()
$1,267
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:52 pm -
2 stops23h 58m
Wed 10/710:15 am -
2 stops24h 00m
Deal found 8/7![Delta logo]()
$1,333
This Air Canada deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” 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 stops52h 00m
Wed 11/118:00 am -
3 stops48h 26m
Deal found 8/10![Multiple Airlines logo]()
$1,399
This American Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” 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 -
1 stop32h 41m
Tue 11/312:00 pm -
1 stop28h 33m
Deal found 8/11![American Airlines logo]()
$1,401
This United Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 9/78:42 am -
1 stop31h 13m
Sun 9/279:30 am -
2 stops24h 13m
Deal found 8/8![United Airlines logo]()
$1,328
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:45 am -
2 stops32h 05m
Wed 11/1810:40 am -
2 stops24h 01m
Deal found 8/7![Delta logo]()
$1,333
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” 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 9/233:34 pm -
2 stops28h 11m
Wed 9/309:20 am -
2 stops29h 10m
Deal found 8/9![Multiple Airlines logo]()
$1,402
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/21:08 pm -
2 stops24h 52m
Mon 11/911:50 am -
1 stop27h 25m
Deal found 8/7![United Airlines logo]()
$1,328
This Qantas Airways deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/72:54 pm -
2 stops28h 31m
Wed 11/111:05 pm -
2 stops51h 40m
Deal found 8/7![Qantas Airways logo]()
$1,664
This Air Canada deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 10/218:55 am -
3 stops39h 00m
Sun 10/255:35 pm -
3 stops60h 51m
Deal found 8/8![Air Canada logo]()
$1,705
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” 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 9/233:32 pm -
2 stops24h 28m
Wed 10/711:20 am -
1 stop23h 23m
Deal found 8/9![United Airlines logo]()
$1,332
This Air Canada deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” 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 stops31h 30m
Tue 11/36:00 am -
3 stops50h 26m
Deal found 8/10![Multiple Airlines logo]()
$1,500
This Qantas Airways deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:20 pm -
2 stops34h 50m
Sun 11/16:50 pm -
2 stops45h 55m
Deal found 8/6![Qantas Airways logo]()
$1,682
This Air Canada deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:05 pm -
3 stops51h 30m
Sun 11/13:20 pm -
3 stops65h 06m
Deal found 8/6![Air Canada logo]()
$1,732
This United Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 9/73:32 pm -
2 stops24h 23m
Mon 9/149:30 am -
2 stops46h 04m
Deal found 8/8![United Airlines logo]()
$1,348
This Ovago deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/213:34 pm -
2 stops25h 51m
Mon 9/281:50 pm -
3 stops34h 39m
Deal found 8/7![Qantas Airways logo]()
$1,740
This American Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/73:32 pm -
2 stops30h 43m
Wed 9/1610:30 am -
2 stops26h 00m
Deal found 8/8![Multiple Airlines logo]()
$1,621
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” 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 10/2611:00 am -
1 stop28h 00m
Sat 11/1411:20 am -
2 stops23h 45m
Deal found 8/9![United Airlines logo]()
$1,378
This Qantas Airways deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:20 pm -
2 stops38h 10m
Sun 11/110:25 am -
2 stops51h 20m
Deal found 8/6![Qantas Airways logo]()
$1,805
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” 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 11/12:55 pm -
1 stop23h 05m
Thu 11/1211:20 am -
2 stops23h 45m
Deal found 8/10![United Airlines logo]()
$1,378
This Air Canada deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:55 am -
3 stops38h 15m
Sat 10/246:00 am -
3 stops30h 00m
Deal found 8/7![Multiple Airlines logo]()
$1,709
This Emirates deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Emirates is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:13 pm -
2 stops40h 07m
Wed 9/309:00 pm -
2 stops39h 21m
Deal found 8/9![Emirates logo]()
$5,023
This Qantas Airways deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:04 am -
2 stops41h 06m
Mon 10/2611:10 pm -
2 stops37h 36m
Deal found 8/7![Qantas Airways logo]()
$1,814
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated August 12, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated August 12, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” 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 8/238:42 am -
2 stops33h 03m
Wed 8/267:50 am -
2 stops29h 37m
Deal found 8/9![Air New Zealand logo]()
$1,338
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:42 am -
1 stop31h 13m
Sun 9/2710:20 am -
1 stop23h 23m
Deal found 8/7![United Airlines logo]()
$1,328
This American Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/710:16 am -
1 stop29h 39m
Mon 9/149:10 am -
1 stop29h 20m
Deal found 8/7![American Airlines logo]()
$1,344
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” 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 9/81:36 pm -
2 stops27h 39m
Mon 9/2810:55 am -
1 stop22h 48m
Deal found 8/9![United Airlines logo]()
$1,263
This oojo deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” 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 9/93:34 pm -
1 stop24h 21m
Wed 9/1612:00 pm -
1 stop21h 04m
Deal found 8/10![Qantas Airways logo]()
$1,329
This oojo deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1011:15 am -
2 stops30h 30m
Wed 9/167:20 pm -
2 stops42h 10m
Deal found 8/11![Air New Zealand logo]()
$1,339
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:59 pm -
2 stops27h 31m
Sat 10/2411:10 am -
2 stops46h 55m
Deal found 8/7![United Airlines logo]()
$1,284
This American Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:34 pm -
1 stop22h 26m
Sat 10/242:35 pm -
1 stop25h 07m
Deal found 8/7![American Airlines logo]()
$1,290
This oojo deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” 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 9/235:00 pm -
1 stop22h 55m
Wed 10/71:00 pm -
1 stop21h 20m
Deal found 8/11![Qantas Airways logo]()
$1,312
This Air Canada deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” 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 9/2312:10 pm -
2 stops27h 55m
Wed 9/3010:00 am -
2 stops23h 41m
Deal found 8/10![Air Canada logo]()
$1,326
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” 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 9/233:32 pm -
2 stops24h 28m
Wed 10/711:20 am -
1 stop23h 23m
Deal found 8/10![United Airlines logo]()
$1,332
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:52 pm -
2 stops23h 58m
Wed 10/710:15 am -
2 stops24h 00m
Deal found 8/7![Delta logo]()
$1,333
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 August 12, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated August 12, 2026.
This Bravofly deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:00 am -
1 stop34h 05m
Deal found 8/8![Qantas Airways logo]()
$642
This United Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 8/235:10 am -
2 stops34h 50m
Deal found 8/8![United Airlines logo]()
$648
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:27 am -
2 stops30h 48m
Deal found 8/7![United Airlines logo]()
$661
This United Airlines deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 8/154:40 pm -
2 stops47h 20m
Deal found 8/8![United Airlines logo]()
$672
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 8/246:00 am -
1 stop34h 05m
Deal found 8/8![Qantas Airways logo]()
$676
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 8/153:41 pm -
3 stops49h 54m
Deal found 8/8![Multiple Airlines logo]()
$708
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” 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 9/1710:20 am -
2 stops30h 10m
Deal found 8/9![Multiple Airlines logo]()
$717
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 8/205:27 pm -
3 stops47h 03m
Deal found 8/8![Multiple Airlines logo]()
$723
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 8/247:58 pm -
3 stops55h 52m
Deal found 8/8![Multiple Airlines logo]()
$759
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 8/226:00 am -
2 stops36h 45m
Deal found 8/8![Qantas Airways logo]()
$764
This Kiwi.com deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” 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 8/216:45 pm -
2 stops45h 45m
Deal found 8/8![Multiple Airlines logo]()
$768
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2112:17 pm -
3 stops31h 33m
Deal found 8/7![Multiple Airlines logo]()
$786
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 August 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,163 (Delta) |
One-way from | $642 (Bravofly) |
Popular in | December |
Cheapest in | July |
Average price | $1,345 |
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 August 12, 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
Tue 10/20
7:20 pm-8:50 am
2 stops45h 30m
Melbourne
Tue 11/3
12:00 pm-9:25 pm
2 stops26h 25m
$1,262
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Tue 9/8
1:36 pm-8:15 am
2 stops27h 39m
Melbourne
Mon 9/28
10:55 am-6:43 pm
1 stop22h 48m
$1,263
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Tue 10/20
11:10 am-9:15 am
2 stops30h 05m
Melbourne
Tue 11/3
12:45 pm-6:05 pm
1 stop22h 20m
$1,267
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Wed 9/23
8:30 am-5:00 am
1 stop29h 30m
Melbourne
Sat 10/24
2:35 pm-12:09 am
2 stops25h 34m
$1,294
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Mon 9/7
8:42 am-6:55 am
1 stop31h 13m
Sydney Kingsford Smith
Sun 9/27
9:30 am-6:43 pm
2 stops24h 13m
$1,328
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Mon 11/2
1:08 pm-7:00 am
2 stops24h 52m
Sydney Kingsford Smith
Mon 11/9
11:50 am-10:15 pm
1 stop27h 25m
$1,328
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 9/23
3:32 pm-7:00 am
2 stops24h 28m
Sydney Kingsford Smith
Wed 10/7
11:20 am-6:43 pm
1 stop23h 23m
$1,332
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 9/23
3:52 pm-6:50 am
2 stops23h 58m
Sydney Kingsford Smith
Wed 10/7
10:15 am-6:15 pm
2 stops24h 00m
$1,333
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Tue 10/13
7:45 am-7:50 am
2 stops32h 05m
Sydney Kingsford Smith
Wed 11/18
10:40 am-5:41 pm
2 stops24h 01m
$1,333
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Mon 9/7
3:32 pm-6:55 am
2 stops24h 23m
Sydney Kingsford Smith
Mon 9/14
9:30 am-4:34 pm
2 stops46h 04m
$1,348
Showing 1-10 of 45 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-PER
STL-AVV
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-PER
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 $992). Flying from St. Louis to Australia in December is currently the most expensive (average of $1,545). 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 August 12, 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.
Overall
7.5
Boarding
7.7
Comfort
7.4
Crew
8.1
Food
7.0
Entertainment
7.2
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Overall
7.5
Boarding
7.7
Comfort
7.4
Crew
8.1
Food
7.0
Entertainment
7.2
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Overall
7.5
Boarding
7.7
Comfort
7.4
Crew
8.1
Food
7.0
Entertainment
7.2
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Overall
7.5
Boarding
7.7
Comfort
7.4
Crew
8.1
Food
7.0
Entertainment
7.2
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Overall
7.5
Boarding
7.7
Comfort
7.4
Crew
8.1
Food
7.0
Entertainment
7.2
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
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Complete your trip
Complete your trip to Australia by adding a car rental and/or hotel reservation to your travel itinerary.
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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 August 12, 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 2,558,603 searches. Data last updated August 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$857 | Average$1,404 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,029 | Average$1,368 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,086 | Average$1,444 | FlexibilityNo cancel fee | On-time71% |