$779+ 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 12/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Dec 12 — Dec 191
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 November 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 November 12, 2026.
This Justfly.com deal was found by Cheapflights users on 11/9. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/102:54 pm -
1 stop23h 36m
Sun 11/229:40 am -
1 stop24h 25m
Deal found 11/9![Qantas Airways logo]()
$1,244
This American Airlines deal was found by Cheapflights users on 11/9. 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.
Tue 11/1012:58 pm -
2 stops24h 52m
Sun 11/221:10 pm -
1 stop26h 48m
Deal found 11/9![American Airlines logo]()
$1,258
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Thu 11/127:05 pm -
1 stop20h 25m
Sat 11/2111:20 am -
1 stop26h 55m
Deal found 11/9![United Airlines logo]()
$1,266
This Delta deal was found by Cheapflights users on 11/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:29 pm -
2 stops28h 01m
Fri 11/2010:40 am -
2 stops28h 42m
Deal found 11/9![Delta logo]()
$1,267
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Thu 11/1210:53 am -
2 stops28h 37m
Fri 11/2011:20 am -
1 stop26h 55m
Deal found 11/9![United Airlines logo]()
$1,270
This United Airlines deal was found by Cheapflights users on 11/7. 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 12/18:17 am -
1 stop31h 13m
Sun 12/1311:20 am -
1 stop22h 51m
Deal found 11/7![United Airlines logo]()
$1,276
This Delta deal was found by Cheapflights users on 11/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:00 pm -
2 stops45h 30m
Wed 11/1810:40 am -
2 stops22h 03m
Deal found 11/9![Delta logo]()
$1,283
This FlightHub deal was found by Cheapflights users on 11/9. 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.
Tue 11/102:54 pm -
1 stop23h 36m
Fri 11/209:40 am -
1 stop18h 46m
Deal found 11/9![Qantas Airways logo]()
$1,284
This United Airlines deal was found by Cheapflights users on 11/9. 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 11/104:39 pm -
2 stops46h 51m
Sat 11/2111:20 am -
2 stops26h 20m
Deal found 11/9![United Airlines logo]()
$1,286
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Thu 11/127:05 pm -
1 stop20h 25m
Thu 11/195:05 am -
3 stops29h 00m
Deal found 11/9![United Airlines logo]()
$1,289
This Delta deal was found by Cheapflights users on 11/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/3010:05 am -
2 stops28h 55m
Mon 1/2510:10 am -
2 stops30h 16m
Deal found 11/10![Delta logo]()
$1,290
This United Airlines deal was found by Cheapflights users on 11/9. 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 11/111:08 pm -
2 stops26h 22m
Thu 11/195:05 am -
2 stops25h 08m
Deal found 11/9![United Airlines logo]()
$1,294
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 November 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 November 12, 2026.
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Sat 3/61:08 pm -
2 stops26h 22m
Mon 3/1510:20 am -
2 stops26h 32m
Deal found 11/10![United Airlines logo]()
$1,269
This Qantas Airways deal was found by Cheapflights users on 11/8. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/136:54 pm -
2 stops23h 11m
Mon 3/12:05 pm -
1 stop21h 04m
Deal found 11/8![Qantas Airways logo]()
$1,278
This Delta deal was found by Cheapflights users on 11/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:00 am -
2 stops33h 00m
Mon 1/2510:10 am -
2 stops28h 32m
Deal found 11/8![Delta logo]()
$1,292
This Qantas Airways deal was found by Cheapflights users on 11/9. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2412:27 pm -
3 stops25h 33m
Fri 4/301:05 pm -
2 stops21h 25m
Deal found 11/9![Multiple Airlines logo]()
$1,356
This Qatar Airways deal was found by Cheapflights users on 11/10. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/16:30 am -
3 stops56h 50m
Thu 3/412:30 pm -
3 stops42h 11m
Deal found 11/10![Qatar Airways logo]()
$2,461
This United Airlines deal was found by Cheapflights users on 11/7. 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.
Fri 3/125:59 pm -
2 stops45h 31m
Sun 3/2110:20 am -
1 stop26h 35m
Deal found 11/7![United Airlines logo]()
$1,287
This Qantas Airways deal was found by Cheapflights users on 11/7. 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.
Fri 2/53:45 pm -
1 stop22h 10m
Sat 2/206:05 am -
2 stops24h 36m
Deal found 11/7![Qantas Airways logo]()
$1,287
This Jetabroad deal was found by Cheapflights users on 11/9. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/13:00 pm -
3 stops29h 10m
Fri 12/47:05 am -
3 stops28h 36m
Deal found 11/9![Air New Zealand logo]()
$2,598
This Qantas Airways deal was found by Cheapflights users on 11/9. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2412:27 pm -
3 stops25h 33m
Tue 5/46:40 am -
3 stops25h 41m
Deal found 11/9![Multiple Airlines logo]()
$1,388
This Qantas Airways deal was found by Cheapflights users on 11/7. 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.
Mon 2/13:45 pm -
1 stop22h 10m
Mon 2/157:20 am -
2 stops23h 21m
Deal found 11/7![Qantas Airways logo]()
$1,289
This United Airlines deal was found by Cheapflights users on 11/6. 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 12/51:18 pm -
2 stops26h 12m
Thu 12/176:05 am -
2 stops39h 01m
Deal found 11/6![United Airlines logo]()
$1,302
This Air New Zealand deal was found by Cheapflights users on 11/8. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/138:53 am -
3 stops30h 42m
Mon 3/111:50 am -
3 stops28h 32m
Deal found 11/8![Multiple Airlines logo]()
$1,437
This Malaysia Airlines deal was found by Cheapflights users on 11/9. 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 Malaysia Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/116:01 am -
3 stops53h 29m
Sat 1/234:15 pm -
3 stops45h 21m
Deal found 11/9![Malaysia Airlines logo]()
$3,463
This Air New Zealand deal was found by Cheapflights users on 11/11. 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 Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2610:55 am -
3 stops29h 00m
Mon 3/810:20 am -
3 stops29h 59m
Deal found 11/11![Multiple Airlines logo]()
$1,460
This United Airlines deal was found by Cheapflights users on 11/6. 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.
Mon 2/18:30 am -
1 stop31h 00m
Fri 2/511:20 am -
1 stop22h 57m
Deal found 11/6![United Airlines logo]()
$1,486
This Qantas Airways deal was found by Cheapflights users on 11/11. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/146:00 pm -
2 stops24h 05m
Mon 2/12:05 pm -
1 stop20h 04m
Deal found 11/11![Qantas Airways logo]()
$1,503
This Justfly.com deal was found by Cheapflights users on 11/8. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/94:10 pm -
3 stops56h 45m
Thu 4/157:15 pm -
3 stops59h 11m
Deal found 11/8![Air Canada logo]()
$3,800
This Air New Zealand deal was found by Cheapflights users on 11/10. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/53:07 pm -
2 stops26h 28m
Sat 2/2011:50 am -
3 stops26h 33m
Deal found 11/10![Multiple Airlines logo]()
$1,474
This United Airlines deal was found by Cheapflights users on 11/10. 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 2/33:03 pm -
2 stops24h 27m
Sun 2/711:20 am -
2 stops26h 17m
Deal found 11/10![United Airlines logo]()
$1,489
This Air New Zealand deal was found by Cheapflights users on 11/10. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/68:33 am -
3 stops30h 27m
Mon 3/158:20 am -
3 stops28h 32m
Deal found 11/10![Multiple Airlines logo]()
$1,476
This Qantas Airways deal was found by Cheapflights users on 11/11. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/232:23 pm -
1 stop21h 37m
Wed 3/109:20 am -
2 stops31h 39m
Deal found 11/11![Qantas Airways logo]()
$1,630
This Air New Zealand deal was found by Cheapflights users on 11/7. 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 New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/298:52 am -
3 stops32h 43m
Sat 5/1511:55 am -
2 stops25h 11m
Deal found 11/7![Multiple Airlines logo]()
$1,477
This FlightHub deal was found by Cheapflights users on 11/9. 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.
Tue 12/12:48 pm -
2 stops31h 27m
Fri 12/46:20 am -
2 stops31h 20m
Deal found 11/9![Qantas Airways logo]()
$1,678
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Wed 3/317:06 pm -
1 stop22h 09m
Tue 4/1310:55 am -
1 stop26h 14m
Deal found 11/8![United Airlines logo]()
$1,702
This Qantas Airways deal was found by Cheapflights users on 11/11. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/146:00 pm -
2 stops24h 05m
Mon 2/111:15 am -
2 stops22h 54m
Deal found 11/11![Multiple Airlines logo]()
$1,508
This Qantas Airways deal was found by Cheapflights users on 11/7. 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 2/65:00 pm -
2 stops34h 15m
Wed 2/109:15 am -
2 stops30h 21m
Deal found 11/7![Qantas Airways logo]()
$1,712
This United Airlines deal was found by Cheapflights users on 11/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/238:40 am -
1 stop32h 50m
Sun 3/712:45 pm -
1 stop26h 10m
Deal found 11/11![United Airlines logo]()
$1,713
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Fri 3/126:54 am -
1 stop34h 36m
Tue 3/2311:45 am -
1 stop26h 10m
Deal found 11/9![United Airlines logo]()
$1,715
This Qantas Airways deal was found by Cheapflights users on 11/7. 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.
Mon 11/302:48 pm -
2 stops26h 47m
Mon 1/258:15 am -
3 stops25h 54m
Deal found 11/7![Multiple Airlines logo]()
$1,575
This Qantas Airways deal was found by Cheapflights users on 11/8. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/116:11 pm -
2 stops27h 34m
Sat 4/1711:20 am -
2 stops51h 39m
Deal found 11/8![Qantas Airways logo]()
$1,771
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated November 12, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated November 12, 2026 and is based on user searches.
This Justfly.com deal was found by Cheapflights users on 11/9. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/102:54 pm -
1 stop23h 36m
Sun 11/229:40 am -
1 stop24h 25m
Deal found 11/9![Qantas Airways logo]()
$1,244
This American Airlines deal was found by Cheapflights users on 11/9. 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.
Tue 11/1012:58 pm -
2 stops24h 52m
Sun 11/221:10 pm -
1 stop26h 48m
Deal found 11/9![American Airlines logo]()
$1,258
This Delta deal was found by Cheapflights users on 11/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:00 pm -
2 stops45h 30m
Sun 11/2210:40 am -
2 stops30h 00m
Deal found 11/9![Delta logo]()
$1,283
This FlightHub deal was found by Cheapflights users on 11/9. 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.
Tue 11/102:54 pm -
1 stop23h 36m
Fri 11/209:40 am -
1 stop18h 46m
Deal found 11/9![Qantas Airways logo]()
$1,284
This United Airlines deal was found by Cheapflights users on 11/9. 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 11/104:39 pm -
2 stops46h 51m
Sat 11/2111:20 am -
2 stops26h 20m
Deal found 11/9![United Airlines logo]()
$1,286
This Delta deal was found by Cheapflights users on 11/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1112:29 pm -
2 stops28h 01m
Fri 11/2010:40 am -
2 stops28h 42m
Deal found 11/9![Delta logo]()
$1,267
This United Airlines deal was found by Cheapflights users on 11/9. 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 11/111:08 pm -
2 stops26h 22m
Thu 11/195:05 am -
2 stops25h 08m
Deal found 11/9![United Airlines logo]()
$1,294
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Thu 11/127:05 pm -
1 stop20h 25m
Sat 11/2111:20 am -
1 stop26h 55m
Deal found 11/9![United Airlines logo]()
$1,266
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Thu 11/1210:53 am -
2 stops28h 37m
Fri 11/2011:20 am -
1 stop26h 55m
Deal found 11/9![United Airlines logo]()
$1,270
This United Airlines deal was found by Cheapflights users on 11/9. 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.
Thu 11/127:05 pm -
1 stop20h 25m
Thu 11/195:05 am -
3 stops29h 00m
Deal found 11/9![United Airlines logo]()
$1,289
This Delta deal was found by Cheapflights users on 11/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/3010:05 am -
2 stops28h 55m
Mon 1/2510:10 am -
2 stops30h 16m
Deal found 11/10![Delta logo]()
$1,290
This United Airlines deal was found by Cheapflights users on 11/7. 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 12/18:17 am -
1 stop31h 13m
Sun 12/1311:20 am -
1 stop22h 51m
Deal found 11/7![United Airlines logo]()
$1,276
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 November 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 November 12, 2026.
This oojo deal was found by Cheapflights users on 11/8. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/286:57 pm -
1 stop42h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Qantas Airways logo]()
$779
This Qantas Airways deal was found by Cheapflights users on 11/8. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/276:55 pm -
2 stops23h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Qantas Airways logo]()
$792
This United Airlines deal was found by Cheapflights users on 11/8. 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.
Fri 11/272:55 pm -
1 stop23h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![United Airlines logo]()
$796
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/96:20 pm -
3 stops56h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/11![Multiple Airlines logo]()
$833
This American Airlines deal was found by Cheapflights users on 11/11. 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.
Thu 12/3112:14 pm -
1 stop25h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/11![American Airlines logo]()
$845
This Trip.com deal was found by Cheapflights users on 11/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/316:01 am -
1 stop33h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/11![Qantas Airways logo]()
$846
This oojo deal was found by Cheapflights users on 11/11. 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 1/86:00 pm -
2 stops43h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/11![Qantas Airways logo]()
$946
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/86:20 pm -
3 stops47h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/11![Multiple Airlines logo]()
$988
This FlightHub deal was found by Cheapflights users on 11/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/76:01 am -
2 stops42h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/11![Qantas Airways logo]()
$1,043
This Kiwi.com deal was found by Cheapflights users on 11/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/710:22 pm -
3 stops57h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/11![Multiple Airlines logo]()
$1,061
This Turkish Airlines deal was found by Cheapflights users on 11/10. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/227:55 pm -
3 stops55h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Multiple Airlines logo]()
$1,069
This Gurufare deal was found by Cheapflights users on 11/10. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/226:57 pm -
2 stops35h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Qantas Airways logo]()
$1,219
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 November 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,236 (Qantas Airways) |
One-way from | $779 (oojo) |
Popular in | December |
Cheapest in | March |
Average price | $1,470 |
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 November 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. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Fri 11/27
6:55 pm-11:05 am
2 stops23h 10m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$792
Quickest round-trip
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Fri 11/27
2:55 pm-7:00 am
1 stop23h 05m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$796
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Thu 12/31
1:51 pm-6:55 am
2 stops24h 04m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$845
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Thu 12/31
6:01 am-9:00 am
1 stop33h 59m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$846
St. LouisBrisbane
STL Lambert-St Louis - BNE Brisbane
STLBNE
Lambert-St Louis
Fri 1/8
6:00 pm-5:50 am
2 stops43h 50m
Brisbane
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$946
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Fri 11/27
10:20 am-7:25 pm
3 stops40h 05m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$954
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Thu 12/31
10:15 am-7:25 pm
3 stops40h 10m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$956
St. LouisBrisbane
STL Lambert-St Louis - BNE Brisbane
STLBNE
Lambert-St Louis
Thu 1/7
10:22 pm-11:25 pm
3 stops57h 03m
Brisbane
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$1,061
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Tue 12/22
7:55 pm-8:45 pm
3 stops55h 50m
Melbourne
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$1,069
St. LouisBrisbane
STL Lambert-St Louis - BNE Brisbane
STLBNE
Lambert-St Louis
Sat 3/6
1:08 pm-7:30 am
2 stops26h 22m
Brisbane
Mon 3/15
10:20 am-9:52 pm
2 stops26h 32m
$1,269
Showing 1-10 of 44 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Australia
Have a flexible travel schedule? Discover the best time to fly to Australia from St. Louis with our price prediction graph.
STL-BNE
STL-SYD
STL-MEL
STL-CBR
STL-PER
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Australia
STL-AU0
STL-BNE
STL-SYD
STL-MEL
STL-CBR
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 $1,868). 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 November 12, 2026.
Read reviews from past customers who have flown Qantas Airways,United Airlines, andAir Canada from St. Louis to Australia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.5
Entertainment
7.2
Food
7.0
Crew
8.1
Boarding
7.7
Overall
7.5
Reviews
1 / 20
8.0
ExcellentJodie,Oct 2026
SYD - GFF
Comfort
7.5
Entertainment
7.2
Food
7.0
Crew
8.1
Boarding
7.7
Overall
7.5
Reviews
1 / 20
8.0
ExcellentJodie,Oct 2026
SYD - GFF
Comfort
7.5
Entertainment
7.2
Food
7.0
Crew
8.1
Boarding
7.7
Overall
7.5
Reviews
1 / 20
8.0
ExcellentJodie,Oct 2026
SYD - GFF
Comfort
7.5
Entertainment
7.2
Food
7.0
Crew
8.1
Boarding
7.7
Overall
7.5
Reviews
1 / 20
8.0
ExcellentJodie,Oct 2026
SYD - GFF
Comfort
7.5
Entertainment
7.2
Food
7.0
Crew
8.1
Boarding
7.7
Overall
7.5
Reviews
1 / 20
8.0
ExcellentJodie,Oct 2026
SYD - GFF
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 November 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 7,457,451 searches. Data last updated November 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$857 | Average$1,488 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,029 | Average$1,380 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,233 | Average$1,605 | FlexibilityNo cancel fee | On-time71% |