$595+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Sep 20 — Sep 271
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 August 21, 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 21, 2026.
This American Airlines deal was found by Cheapflights users on 8/17. 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 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 8/17![American Airlines logo]()
$1,145
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 11/310:10 am -
2 stops27h 59m
Deal found 8/18![Delta logo]()
$1,163
This American Airlines deal was found by Cheapflights users on 8/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:47 pm -
2 stops29h 48m
Tue 11/312:00 pm -
1 stop26h 59m
Deal found 8/17![American Airlines logo]()
$1,178
This FlightHub deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/258:00 am -
2 stops36h 50m
Sat 10/317:25 pm -
2 stops43h 50m
Deal found 8/20![Air New Zealand logo]()
$1,256
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:12 pm -
2 stops26h 03m
Wed 10/711:55 am -
1 stop22h 48m
Deal found 8/16![United Airlines logo]()
$1,263
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 8/18![United Airlines logo]()
$1,268
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/47:08 am -
2 stops37h 12m
Sun 10/1111:55 am -
1 stop22h 48m
Deal found 8/20![United Airlines logo]()
$1,292
This oojo deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:47 pm -
1 stop26h 43m
Fri 10/301:10 pm -
1 stop25h 49m
Deal found 8/18![Qantas Airways logo]()
$1,293
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2211:00 am -
2 stops28h 35m
Mon 11/307:25 pm -
2 stops43h 41m
Deal found 8/17![Air New Zealand logo]()
$1,303
This FlightHub deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/133:12 pm -
2 stops38h 38m
Fri 11/139:55 am -
2 stops29h 31m
Deal found 8/19![Air New Zealand logo]()
$1,304
This oojo deal was found by Cheapflights users on 8/16. 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.
Tue 9/153:34 pm -
1 stop24h 21m
Tue 9/225:50 pm -
1 stop20h 40m
Deal found 8/16![Qantas Airways logo]()
$1,307
This Trip.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:17 pm -
3 stops43h 08m
Wed 10/72:15 pm -
3 stops48h 58m
Deal found 8/18![Multiple Airlines logo]()
$1,310
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 21, 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 21, 2026.
This Delta deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:20 pm -
2 stops45h 30m
Tue 11/310:10 am -
2 stops27h 59m
Deal found 8/21![Delta logo]()
$1,164
This American Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:47 pm -
2 stops29h 48m
Tue 11/312:00 pm -
1 stop26h 59m
Deal found 8/21![American Airlines logo]()
$1,179
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:12 pm -
2 stops26h 03m
Wed 10/711:55 am -
1 stop22h 48m
Deal found 8/16![United Airlines logo]()
$1,263
This Qantas Airways deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:47 pm -
2 stops29h 23m
Fri 10/307:40 am -
2 stops25h 38m
Deal found 8/18![Qantas Airways logo]()
$1,340
This Air New Zealand deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/271:08 pm -
3 stops27h 47m
Wed 11/118:15 am -
3 stops31h 09m
Deal found 8/20![Multiple Airlines logo]()
$1,362
This Air Canada deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:40 pm -
3 stops30h 25m
Tue 11/38:00 am -
3 stops48h 26m
Deal found 8/21![Air Canada logo]()
$1,390
This Cathay Pacific deal was found by Cheapflights users on 8/16. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1411:29 am -
2 stops42h 31m
Wed 11/188:40 am -
2 stops49h 07m
Deal found 8/16![Cathay Pacific logo]()
$1,605
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 8/19![United Airlines logo]()
$1,268
This Delta deal was found by Cheapflights users on 8/16. 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.
Tue 9/158:46 am -
2 stops31h 04m
Tue 9/229:15 am -
2 stops23h 22m
Deal found 8/16![Delta logo]()
$1,333
This Air Canada deal was found by Cheapflights users on 8/17. 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 stops63h 10m
Wed 11/116:00 am -
3 stops50h 26m
Deal found 8/17![Multiple Airlines logo]()
$1,373
This Qantas Airways deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 stops30h 50m
Deal found 8/20![Qantas Airways logo]()
$1,385
This United Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/84:17 pm -
1 stop21h 43m
Mon 2/159:20 am -
1 stop26h 18m
Deal found 8/17![United Airlines logo]()
$1,328
This Delta deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:40 am -
2 stops33h 10m
Wed 10/710:15 am -
2 stops24h 00m
Deal found 8/19![Delta logo]()
$1,383
This Cathay Pacific deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:13 pm -
2 stops44h 42m
Sun 11/1512:25 am -
2 stops37h 20m
Deal found 8/20![Multiple Airlines logo]()
$1,450
This Ovago deal was found by Cheapflights users on 8/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:00 pm -
2 stops26h 15m
Wed 10/79:45 am -
2 stops24h 35m
Deal found 8/16![Qantas Airways logo]()
$1,464
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:40 pm -
2 stops23h 15m
Wed 10/710:30 am -
2 stops25h 46m
Deal found 8/21![United Airlines logo]()
$1,333
This Air Canada deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/14:05 pm -
3 stops62h 15m
Mon 11/163:15 pm -
3 stops62h 11m
Deal found 8/18![Air Canada logo]()
$1,626
This Air New Zealand deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/113:13 pm -
2 stops26h 32m
Sat 10/1011:55 am -
3 stops27h 49m
Deal found 8/18![Multiple Airlines logo]()
$1,481
This United Airlines deal was found by Cheapflights users on 8/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/183:32 pm -
2 stops24h 28m
Wed 10/711:20 am -
1 stop23h 23m
Deal found 8/21![United Airlines logo]()
$1,383
This Delta deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/46:59 pm -
2 stops44h 01m
Thu 1/2110:10 am -
2 stops23h 44m
Deal found 8/18![Delta logo]()
$1,603
This Qantas Airways deal was found by Cheapflights users on 8/17. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/313:20 pm -
2 stops29h 05m
Wed 11/41:05 pm -
2 stops51h 40m
Deal found 8/17![Qantas Airways logo]()
$1,664
This Cathay Pacific deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:29 am -
2 stops37h 46m
Sun 9/2011:45 pm -
2 stops38h 45m
Deal found 8/18![Multiple Airlines logo]()
$1,520
This United Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/217:05 pm -
1 stop21h 15m
Sat 11/2811:20 am -
2 stops29h 12m
Deal found 8/17![United Airlines logo]()
$1,523
This Qantas Airways deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/116:02 am -
2 stops47h 28m
Sun 11/157:50 pm -
2 stops39h 25m
Deal found 8/16![Qantas Airways logo]()
$1,697
This Cathay Pacific deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/33:34 pm -
2 stops42h 06m
Fri 10/912:10 am -
2 stops36h 49m
Deal found 8/18![Multiple Airlines logo]()
$1,545
This United Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:08 am -
1 stop34h 07m
Thu 10/811:55 am -
1 stop22h 48m
Deal found 8/17![United Airlines logo]()
$1,546
This Cathay Pacific deal was found by Cheapflights users on 8/17. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:01 am -
2 stops46h 39m
Wed 10/712:10 am -
2 stops36h 36m
Deal found 8/17![Multiple Airlines logo]()
$1,546
This Expedia deal was found by Cheapflights users on 8/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:00 pm -
2 stops38h 50m
Wed 10/72:55 pm -
2 stops24h 51m
Deal found 8/16![Multiple Airlines logo]()
$1,611
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/11:08 pm -
3 stops32h 12m
Mon 11/1611:45 pm -
2 stops32h 20m
Deal found 8/18![United Airlines logo]()
$1,730
This oojo deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:47 pm -
2 stops39h 53m
Wed 11/116:00 am -
2 stops34h 45m
Deal found 8/19![Qantas Airways logo]()
$2,236
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated August 21, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated August 21, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/203:13 pm -
2 stops24h 47m
Thu 8/2710:20 am -
1 stop22h 39m
Deal found 8/19![United Airlines logo]()
$1,339
This Delta deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:15 am -
2 stops30h 35m
Thu 8/279:15 am -
2 stops24h 40m
Deal found 8/19![Delta logo]()
$1,344
This KAYAK deal was found by Cheapflights users on 8/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/76:15 am -
2 stops48h 35m
Sun 9/276:05 pm -
2 stops43h 25m
Deal found 8/17![Air New Zealand logo]()
$1,331
This oojo deal was found by Cheapflights users on 8/16. 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.
Tue 9/153:34 pm -
1 stop24h 21m
Tue 9/225:50 pm -
1 stop20h 40m
Deal found 8/16![Qantas Airways logo]()
$1,307
This American Airlines deal was found by Cheapflights users on 8/16. 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 9/155:00 pm -
1 stop22h 55m
Tue 9/229:10 am -
2 stops22h 38m
Deal found 8/16![American Airlines logo]()
$1,349
This Air Canada deal was found by Cheapflights users on 8/17. 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 9/152:40 pm -
3 stops29h 40m
Mon 9/218:30 pm -
3 stops38h 50m
Deal found 8/17![Multiple Airlines logo]()
$1,429
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/181:36 pm -
2 stops26h 24m
Wed 10/711:20 am -
1 stop23h 23m
Deal found 8/18![United Airlines logo]()
$1,383
This United Airlines deal was found by Cheapflights users on 8/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:32 pm -
2 stops24h 28m
Wed 10/711:20 am -
1 stop23h 23m
Deal found 8/17![United Airlines logo]()
$1,333
This American Airlines deal was found by Cheapflights users on 8/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:30 am -
1 stop33h 35m
Wed 10/71:00 pm -
1 stop22h 48m
Deal found 8/17![American Airlines logo]()
$1,355
This Delta deal was found by Cheapflights users on 8/16. 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 9/306:15 am -
2 stops34h 35m
Wed 10/711:00 am -
2 stops22h 44m
Deal found 8/16![Delta logo]()
$1,163
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:12 pm -
2 stops26h 03m
Wed 10/711:55 am -
1 stop22h 48m
Deal found 8/16![United Airlines logo]()
$1,263
This Trip.com deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:17 pm -
3 stops43h 08m
Wed 10/72:15 pm -
3 stops48h 58m
Deal found 8/18![Multiple Airlines logo]()
$1,310
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 21, 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 21, 2026.
This American Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:20 pm -
1 stop21h 40m
Deal found 8/20![American Airlines logo]()
$595
This American Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:04 am -
1 stop32h 41m
Deal found 8/20![American Airlines logo]()
$611
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/149:00 am -
2 stops31h 30m
Deal found 8/18![United Airlines logo]()
$661
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/241:08 pm -
3 stops26h 57m
Deal found 8/19![United Airlines logo]()
$708
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/227:06 pm -
1 stop21h 14m
Deal found 8/19![United Airlines logo]()
$768
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:02 am -
3 stops47h 48m
Deal found 8/16![Multiple Airlines logo]()
$778
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:53 pm -
3 stops50h 02m
Deal found 8/16![Multiple Airlines logo]()
$786
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/207:06 pm -
1 stop42h 14m
Deal found 8/19![United Airlines logo]()
$786
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:02 am -
3 stops48h 53m
Deal found 8/16![Multiple Airlines logo]()
$803
This Air Canada deal was found by Cheapflights users on 8/17. 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.
Wed 10/142:40 pm -
3 stops29h 00m
Deal found 8/17![Multiple Airlines logo]()
$826
This Kiwi.com deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:02 am -
3 stops45h 18m
Deal found 8/20![Multiple Airlines logo]()
$829
This Cathay Pacific deal was found by Cheapflights users on 8/16. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/231:06 pm -
2 stops28h 44m
Deal found 8/16![Cathay Pacific logo]()
$833
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 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,145 (American Airlines) |
One-way from | $595 (American Airlines) |
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 7,457,451 searches. Data last updated August 21, 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
10:10 am-9:09 pm
2 stops27h 59m
$1,164
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Tue 10/20
12:47 pm-10:35 am
2 stops29h 48m
Melbourne
Tue 11/3
12:00 pm-9:59 pm
1 stop26h 59m
$1,179
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Wed 9/30
3:12 pm-8:15 am
2 stops26h 03m
Melbourne
Wed 10/7
11:55 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
$1,268
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Mon 2/8
4:17 pm-7:00 am
1 stop21h 43m
Sydney Kingsford Smith
Mon 2/15
9:20 am-6:38 pm
1 stop26h 18m
$1,328
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Tue 9/15
8:46 am-6:50 am
2 stops31h 04m
Sydney Kingsford Smith
Tue 9/22
9:15 am-5:37 pm
2 stops23h 22m
$1,333
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 9/23
4:40 pm-6:55 am
2 stops23h 15m
Sydney Kingsford Smith
Wed 10/7
10:30 am-8:16 pm
2 stops25h 46m
$1,333
St. LouisBrisbane
STL Lambert-St Louis - BNE Brisbane
STLBNE
Lambert-St Louis
Tue 10/27
12:47 pm-9:10 am
2 stops29h 23m
Brisbane
Fri 10/30
7:40 am-6:18 pm
2 stops25h 38m
$1,340
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Tue 10/27
1:08 pm-8:55 am
3 stops27h 47m
Melbourne
Wed 11/11
8:15 am-10:24 pm
3 stops31h 09m
$1,362
St. LouisMelbourne
STL Lambert-St Louis - AVV Melbourne Avalon
STLAVV
Lambert-St Louis
Tue 10/27
4:05 pm-11:15 pm
3 stops63h 10m
Melbourne Avalon
Wed 11/11
6:00 am-3:26 pm
3 stops50h 26m
$1,373
Showing 1-10 of 54 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-PER
STL-SYD
STL-AVV
STL-BNE
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-PER
STL-SYD
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 $992). Flying from St. Louis to Australia in December is currently the most expensive (average of $1,523). 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 21, 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.
Comfort
7.4
Boarding
7.7
Crew
8.1
Food
7.0
Overall
7.5
Entertainment
7.2
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Comfort
7.4
Boarding
7.7
Crew
8.1
Food
7.0
Overall
7.5
Entertainment
7.2
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Comfort
7.4
Boarding
7.7
Crew
8.1
Food
7.0
Overall
7.5
Entertainment
7.2
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Comfort
7.4
Boarding
7.7
Crew
8.1
Food
7.0
Overall
7.5
Entertainment
7.2
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Comfort
7.4
Boarding
7.7
Crew
8.1
Food
7.0
Overall
7.5
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 21, 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 August 21, 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$1,364 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,086 | Average$1,444 | FlexibilityNo cancel fee | On-time71% |