$608+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Sep 16 — Sep 231
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 17, 2026.
Explore the most affordable flight options available from St. Louis to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 17, 2026.
This American Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:40 am -
1 stop31h 20m
Wed 11/1110:45 pm -
2 stops26h 22m
Deal found 8/14![American Airlines logo]()
$1,145
This Delta 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 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 8/17![Delta logo]()
$1,163
This American Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:47 pm -
2 stops29h 48m
Tue 11/312:00 pm -
1 stop26h 59m
Deal found 8/14![American Airlines logo]()
$1,178
This American Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/295:00 pm -
2 stops28h 40m
Tue 10/63:25 pm -
2 stops24h 21m
Deal found 8/15![American Airlines logo]()
$1,208
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/161:36 pm -
2 stops26h 24m
Sun 8/3010:20 am -
2 stops21h 14m
Deal found 8/14![United Airlines logo]()
$1,229
This United Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/163:32 pm -
2 stops24h 28m
Sun 8/2310:20 am -
1 stop22h 39m
Deal found 8/15![United Airlines logo]()
$1,238
This American Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:00 am -
1 stop34h 05m
Sun 8/309:10 am -
1 stop28h 49m
Deal found 8/14![American Airlines logo]()
$1,255
This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/182:25 pm -
2 stops26h 25m
Fri 9/2510:00 am -
2 stops29h 44m
Deal found 8/14![Delta logo]()
$1,263
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2911:10 am -
2 stops30h 05m
Tue 10/611:55 am -
2 stops24h 21m
Deal found 8/14![United Airlines logo]()
$1,268
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/167:05 pm -
1 stop22h 25m
Sun 11/228:00 am -
2 stops47h 13m
Deal found 8/14![United Airlines logo]()
$1,277
This oojo deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/208:36 am -
2 stops33h 09m
Wed 9/306:50 am -
2 stops30h 40m
Deal found 8/12![Air New Zealand logo]()
$1,292
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:53 am -
2 stops29h 02m
Sat 8/299:30 am -
2 stops22h 36m
Deal found 8/12![United Airlines logo]()
$1,293
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 17, 2026.
Discover carefully curated flight deals from St. Louis to Australia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 17, 2026.
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 10/207:20 pm -
2 stops45h 30m
Tue 11/310:10 am -
2 stops27h 59m
Deal found 8/16![Delta logo]()
$1,163
This United Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/293:12 pm -
2 stops26h 03m
Tue 10/611:55 am -
1 stop22h 48m
Deal found 8/15![United Airlines logo]()
$1,263
This Qantas Airways deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/104:57 pm -
2 stops25h 08m
Tue 2/162:05 pm -
1 stop21h 06m
Deal found 8/15![Qantas Airways logo]()
$1,311
This Air Canada deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:05 pm -
3 stops63h 10m
Wed 11/116:00 am -
3 stops50h 26m
Deal found 8/15![Multiple Airlines logo]()
$1,373
This Qatar Airways deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:00 am -
2 stops41h 50m
Wed 11/1811:40 pm -
2 stops55h 37m
Deal found 8/15![Qatar Airways logo]()
$1,570
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 Air Canada deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/292:40 pm -
3 stops42h 00m
Tue 10/610:55 pm -
3 stops52h 05m
Deal found 8/15![Air Canada logo]()
$1,669
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/297:05 pm -
1 stop20h 25m
Mon 11/211:40 am -
1 stop22h 25m
Deal found 8/12![United Airlines logo]()
$1,297
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 Qantas Airways deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/142:54 pm -
1 stop21h 06m
Wed 11/184:55 pm -
2 stops47h 50m
Deal found 8/15![Qantas Airways logo]()
$1,371
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:39 pm -
2 stops46h 51m
Sat 10/3110:40 am -
1 stop22h 25m
Deal found 8/12![United Airlines logo]()
$1,317
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/296:00 am -
2 stops33h 30m
Tue 12/810:40 am -
2 stops29h 43m
Deal found 8/17![Delta logo]()
$1,333
This Air Canada deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:55 pm -
2 stops45h 10m
Thu 9/178:15 pm -
3 stops39h 05m
Deal found 8/13![Multiple Airlines logo]()
$1,469
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:50 pm -
2 stops44h 40m
Mon 11/211:40 am -
2 stops26h 44m
Deal found 8/12![United Airlines logo]()
$1,318
This Cathay Pacific deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/76:00 am -
2 stops35h 40m
Mon 9/142:05 pm -
2 stops45h 39m
Deal found 8/15![Multiple Airlines logo]()
$1,473
This oojo deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:00 am -
2 stops34h 25m
Sat 9/1910:40 am -
2 stops51h 50m
Deal found 8/15![Qantas Airways logo]()
$1,583
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.
Sat 11/147:05 pm -
2 stops45h 35m
Wed 11/189:15 am -
1 stop26h 23m
Deal found 8/16![United Airlines logo]()
$1,320
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 9/46:00 am -
2 stops38h 45m
Mon 9/149:55 pm -
2 stops40h 35m
Deal found 8/16![Multiple Airlines logo]()
$1,523
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/243:12 pm -
2 stops24h 18m
Thu 10/298:55 pm -
3 stops36h 10m
Deal found 8/12![United Airlines logo]()
$1,324
This Qantas Airways deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/313:20 pm -
2 stops29h 05m
Wed 11/41:05 pm -
2 stops51h 40m
Deal found 8/15![Qantas Airways logo]()
$1,664
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 United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/181:36 pm -
2 stops26h 24m
Tue 10/279:20 am -
1 stop20h 53m
Deal found 8/12![United Airlines logo]()
$1,328
This Qantas Airways deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:05 pm -
2 stops23h 25m
Sun 11/157:50 pm -
2 stops33h 38m
Deal found 8/14![Qantas Airways logo]()
$1,688
This Cathay Pacific deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/411:01 am -
2 stops32h 49m
Sun 10/1812:20 pm -
2 stops47h 37m
Deal found 8/13![Multiple Airlines logo]()
$1,569
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/181:36 pm -
2 stops26h 24m
Wed 10/711:20 am -
1 stop23h 23m
Deal found 8/12![United Airlines logo]()
$1,383
This Cathay Pacific deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am -
2 stops37h 50m
Wed 9/22:20 pm -
3 stops47h 21m
Deal found 8/14![Multiple Airlines logo]()
$1,637
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:40 pm -
3 stops32h 30m
Wed 10/76:00 am -
3 stops30h 00m
Deal found 8/16![Multiple Airlines logo]()
$1,671
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 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/91:06 pm -
3 stops35h 34m
Sun 10/256:20 pm -
3 stops41h 37m
Deal found 8/15![Multiple Airlines logo]()
$1,705
This United Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/411:10 am -
2 stops28h 20m
Sun 10/1810:30 am -
1 stop23h 13m
Deal found 8/13![United Airlines logo]()
$1,597
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated August 17, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated August 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/161:36 pm -
2 stops26h 24m
Sun 8/3010:20 am -
2 stops21h 14m
Deal found 8/14![United Airlines logo]()
$1,229
This United Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/163:32 pm -
2 stops24h 28m
Sun 8/2310:20 am -
1 stop22h 39m
Deal found 8/15![United Airlines logo]()
$1,238
This American Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:00 am -
1 stop34h 05m
Sun 8/309:10 am -
1 stop28h 49m
Deal found 8/14![American Airlines logo]()
$1,255
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:53 am -
2 stops29h 02m
Sat 8/299:30 am -
2 stops22h 36m
Deal found 8/12![United Airlines logo]()
$1,293
This American Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/181:25 pm -
2 stops26h 40m
Sat 8/295:50 pm -
1 stop20h 09m
Deal found 8/12![American Airlines logo]()
$1,309
This Delta deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/182:25 pm -
2 stops26h 25m
Fri 9/2510:00 am -
2 stops29h 44m
Deal found 8/14![Delta logo]()
$1,263
This oojo deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/208:36 am -
2 stops33h 09m
Wed 9/306:50 am -
2 stops30h 40m
Deal found 8/12![Air New Zealand logo]()
$1,292
This oojo deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:00 pm -
1 stop22h 55m
Wed 10/71:00 pm -
1 stop21h 20m
Deal found 8/12![Qantas Airways logo]()
$1,306
This American Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/295:00 pm -
2 stops28h 40m
Tue 10/63:25 pm -
2 stops24h 21m
Deal found 8/15![American Airlines logo]()
$1,208
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2911:10 am -
2 stops30h 05m
Tue 10/611:55 am -
2 stops24h 21m
Deal found 8/14![United Airlines logo]()
$1,268
This United Airlines deal was found by Cheapflights users on 8/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/294:39 pm -
2 stops23h 21m
Tue 10/610:30 am -
2 stops24h 13m
Deal found 8/14![United Airlines logo]()
$1,328
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
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 17, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
This Delta deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:47 am -
2 stops34h 03m
Deal found 8/13![Delta logo]()
$608
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 10/149:00 am -
2 stops31h 30m
Deal found 8/17![United Airlines logo]()
$661
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.
Fri 1/227:06 pm -
1 stop21h 14m
Deal found 8/16![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 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 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/142:40 pm -
3 stops29h 25m
Deal found 8/13![Multiple Airlines logo]()
$826
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
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.
Sun 10/187:02 am -
3 stops47h 48m
Deal found 8/16![Multiple Airlines logo]()
$837
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:31 am -
2 stops30h 19m
Deal found 8/16![Cathay Pacific logo]()
$856
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.
Fri 10/235:53 pm -
3 stops46h 42m
Deal found 8/16![Multiple Airlines logo]()
$867
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.
Thu 10/224:42 pm -
3 stops58h 18m
Deal found 8/16![Multiple Airlines logo]()
$872
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 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,145 (American Airlines) |
One-way from | $608 (Delta) |
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 17, 2026.
Use the filters below to find and compare flights from St. Louis to Australia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
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
$1,163
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Tue 9/29
3:12 pm-8:15 am
2 stops26h 03m
Melbourne
Tue 10/6
11:55 am-6:43 pm
1 stop22h 48m
$1,263
Quickest round-trip
St. LouisBrisbane
STL Lambert-St Louis - BNE Brisbane
STLBNE
Lambert-St Louis
Thu 10/29
7:05 pm-6:30 am
1 stop20h 25m
Brisbane
Mon 11/2
11:40 am-6:05 pm
1 stop22h 25m
$1,297
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 2/10
4:57 pm-11:05 am
2 stops25h 08m
Sydney Kingsford Smith
Tue 2/16
2:05 pm-6:11 pm
1 stop21h 06m
$1,311
St. LouisBrisbane
STL Lambert-St Louis - BNE Brisbane
STLBNE
Lambert-St Louis
Tue 10/27
4:39 pm-6:30 am
2 stops46h 51m
Brisbane
Sat 10/31
10:40 am-6:05 pm
1 stop22h 25m
$1,317
St. LouisBrisbane
STL Lambert-St Louis - BNE Brisbane
STLBNE
Lambert-St Louis
Sun 10/25
6:50 pm-6:30 am
2 stops44h 40m
Brisbane
Mon 11/2
11:40 am-10:24 pm
2 stops26h 44m
$1,318
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Sat 11/14
7:05 pm-9:40 am
2 stops45h 35m
Sydney Kingsford Smith
Wed 11/18
9:15 am-6:38 pm
1 stop26h 23m
$1,320
St. LouisBrisbane
STL Lambert-St Louis - BNE Brisbane
STLBNE
Lambert-St Louis
Sat 10/24
3:12 pm-6:30 am
2 stops24h 18m
Brisbane
Thu 10/29
8:55 pm-6:05 pm
3 stops36h 10m
$1,324
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Sun 10/18
1:36 pm-8:00 am
2 stops26h 24m
Sydney Kingsford Smith
Tue 10/27
9:20 am-2:13 pm
1 stop20h 53m
$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
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-AVV
STL-PER
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-SYD
STL-AVV
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 $1,523). 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 17, 2026.
Read reviews from past customers who have flown Qantas Airways,United Airlines, andAmerican Airlines from St. Louis to Australia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.4
Boarding
7.7
Crew
8.1
Entertainment
7.2
Food
7.0
Overall
7.5
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Comfort
7.4
Boarding
7.7
Crew
8.1
Entertainment
7.2
Food
7.0
Overall
7.5
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Comfort
7.4
Boarding
7.7
Crew
8.1
Entertainment
7.2
Food
7.0
Overall
7.5
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Comfort
7.4
Boarding
7.7
Crew
8.1
Entertainment
7.2
Food
7.0
Overall
7.5
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Comfort
7.4
Boarding
7.7
Crew
8.1
Entertainment
7.2
Food
7.0
Overall
7.5
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for St. Louis to Australia
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Australia by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Australia by cabin class
Find flights from St. Louis to Australia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Australia flights
Browse other St. Louis and Australia flight options. Last updated on August 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Fly to Australia regions
Consider these flights traveling to Australia regions.
Top 4 airlines flying from St. Louis to Australia
Discover the top 4 airlines that operate flights from St. Louis to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 17, 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% |