$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 25 — Oct 21
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 26, 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 26, 2026.
This American Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 8/25![American Airlines logo]()
$1,145
This American Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:04 am -
1 stop32h 41m
Tue 11/312:00 pm -
1 stop28h 33m
Deal found 8/25![American Airlines logo]()
$1,150
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 10/2712:00 pm -
2 stops27h 00m
Wed 11/1110:10 am -
2 stops28h 08m
Deal found 8/25![Delta logo]()
$1,164
This Delta deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 8/26![Delta logo]()
$1,165
This Delta deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 10/307:00 pm -
2 stops69h 00m
Mon 11/910:10 am -
2 stops24h 31m
Deal found 8/24![Delta logo]()
$1,178
This FlightHub deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:10 pm -
1 stop41h 50m
Wed 11/1110:45 pm -
1 stop42h 00m
Deal found 8/24![Qantas Airways logo]()
$1,191
This Qantas Airways deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 10/267:10 pm -
1 stop41h 50m
Sun 11/812:00 pm -
1 stop23h 16m
Deal found 8/24![Qantas Airways logo]()
$1,202
This Delta deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 10/292:25 pm -
2 stops24h 35m
Tue 11/1010:10 am -
2 stops23h 33m
Deal found 8/24![Delta logo]()
$1,214
This Trip.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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.
Mon 9/2812:17 pm -
3 stops32h 33m
Sun 10/182:15 pm -
3 stops38h 20m
Deal found 8/23![Multiple Airlines logo]()
$1,216
This Delta deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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.
Sat 10/245:00 pm -
2 stops46h 00m
Thu 11/1210:10 am -
2 stops24h 31m
Deal found 8/24![Delta logo]()
$1,228
This Delta deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 10/287:00 pm -
2 stops44h 00m
Mon 11/910:10 am -
2 stops24h 31m
Deal found 8/24![Delta logo]()
$1,229
This Air Canada deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/712:10 pm -
2 stops27h 55m
Wed 4/710:00 am -
2 stops21h 26m
Deal found 8/25![Multiple Airlines logo]()
$1,290
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 26, 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 26, 2026.
This Delta deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 10/2712:00 pm -
2 stops27h 00m
Wed 11/1110:10 am -
2 stops28h 08m
Deal found 8/23![Delta logo]()
$1,164
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.
Tue 10/611:10 am -
2 stops30h 05m
Tue 10/1311:55 am -
1 stop22h 48m
Deal found 8/21![United Airlines logo]()
$1,268
This Air Canada deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 stops55h 30m
Wed 11/116:00 am -
3 stops50h 26m
Deal found 8/25![Multiple Airlines logo]()
$1,334
This oojo deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 9/226:30 am -
2 stops36h 50m
Tue 9/295:35 pm -
2 stops38h 05m
Deal found 8/24![Qantas Airways logo]()
$1,548
This Qatar Airways deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 2/88:29 am -
2 stops41h 01m
Fri 2/123:10 pm -
2 stops44h 31m
Deal found 8/23![Qatar Airways logo]()
$1,653
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/81:30 pm -
2 stops51h 15m
Thu 1/2810:45 am -
2 stops26h 14m
Deal found 8/21![Air Canada logo]()
$1,716
This Ovago deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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.
Thu 10/87:08 am -
2 stops39h 32m
Thu 10/1510:55 am -
2 stops26h 35m
Deal found 8/23![Air New Zealand logo]()
$2,066
This Delta deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 9/2312:00 pm -
2 stops28h 50m
Wed 9/3010:00 am -
2 stops24h 58m
Deal found 8/26![Delta logo]()
$1,164
This United Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 8/23![United Airlines logo]()
$1,268
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.
Mon 2/87:06 pm -
1 stop20h 24m
Fri 2/1211:20 am -
1 stop26h 35m
Deal found 8/21![United Airlines logo]()
$1,297
This Cathay Pacific 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 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 8/21![Multiple Airlines logo]()
$1,450
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.
Sun 10/46:15 am -
2 stops33h 35m
Sun 10/1110:15 am -
2 stops30h 29m
Deal found 8/21![Delta logo]()
$1,334
This Cathay Pacific deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 10/81:06 pm -
2 stops42h 09m
Sun 10/1812:45 am -
2 stops39h 14m
Deal found 8/25![Multiple Airlines logo]()
$1,467
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 8/24![United Airlines logo]()
$1,334
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:52 pm -
2 stops23h 58m
Wed 10/710:15 am -
2 stops24h 00m
Deal found 8/25![Delta logo]()
$1,334
This Qantas Airways 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/84:57 pm -
2 stops26h 28m
Fri 2/121:05 pm -
2 stops51h 43m
Deal found 8/21![Qantas Airways logo]()
$1,665
This Cathay Pacific deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 9/76:35 am -
2 stops38h 10m
Sun 9/279:55 pm -
2 stops40h 35m
Deal found 8/23![Multiple Airlines logo]()
$1,474
This Qantas Airways deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/82:54 pm -
1 stop23h 01m
Wed 11/119:55 am -
2 stops27h 47m
Deal found 8/25![Qantas Airways logo]()
$1,674
This Qatar Airways deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/911:32 am -
2 stops41h 13m
Fri 11/1310:45 pm -
2 stops37h 38m
Deal found 8/22![Qatar Airways logo]()
$1,938
This Cathay Pacific deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 9/1711:01 am -
2 stops33h 44m
Wed 9/232:05 pm -
2 stops46h 52m
Deal found 8/25![Multiple Airlines logo]()
$1,475
This Delta deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 12/287:38 pm -
2 stops43h 22m
Sun 1/1010:10 am -
2 stops30h 08m
Deal found 8/24![Delta logo]()
$1,494
This United Airlines deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 10/87:08 am -
1 stop34h 07m
Mon 10/1911:55 am -
1 stop22h 48m
Deal found 8/25![United Airlines logo]()
$1,498
This Air Canada deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:05 pm -
3 stops62h 15m
Fri 11/1310:55 pm -
3 stops54h 31m
Deal found 8/25![Air Canada logo]()
$2,015
This Cathay Pacific deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 9/137:36 pm -
2 stops46h 04m
Wed 9/237:40 am -
2 stops31h 03m
Deal found 8/24![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.
Sun 10/411:10 am -
2 stops28h 50m
Sun 10/1111:20 am -
1 stop23h 23m
Deal found 8/21![United Airlines logo]()
$1,513
This Qantas Airways deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/72:54 pm -
2 stops32h 01m
Wed 11/116:00 am -
2 stops30h 42m
Deal found 8/25![Qantas Airways logo]()
$1,885
This Air Canada deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 stops33h 25m
Tue 11/36:00 am -
3 stops50h 26m
Deal found 8/25![Multiple Airlines logo]()
$1,481
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 12/286:15 am -
2 stops34h 15m
Thu 1/712:45 pm -
2 stops44h 41m
Deal found 8/24![United Airlines logo]()
$1,636
This Ovago deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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.
Thu 10/82:27 pm -
3 stops29h 23m
Thu 10/1512:40 pm -
2 stops48h 19m
Deal found 8/23![Qantas Airways logo]()
$2,095
This Air New Zealand deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 10/272:55 pm -
2 stops26h 00m
Wed 11/118:15 am -
3 stops30h 20m
Deal found 8/22![Multiple Airlines logo]()
$1,702
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated August 26, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated August 26, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/712:10 pm -
2 stops27h 55m
Wed 4/710:00 am -
2 stops21h 26m
Deal found 8/25![Multiple Airlines logo]()
$1,290
This Expedia deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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.
Tue 9/88:55 am -
3 stops56h 40m
Mon 9/286:00 am -
3 stops47h 00m
Deal found 8/25![Multiple Airlines logo]()
$1,379
This Delta deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/188:00 am -
2 stops31h 50m
Wed 10/710:15 am -
2 stops26h 36m
Deal found 8/22![Delta logo]()
$1,384
This oojo deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:30 am -
1 stop33h 35m
Wed 10/76:50 pm -
1 stop20h 56m
Deal found 8/22![Qantas Airways logo]()
$1,415
This Delta deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 9/2312:00 pm -
2 stops28h 50m
Wed 9/3010:00 am -
2 stops24h 58m
Deal found 8/26![Delta logo]()
$1,164
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 9/233:13 pm -
2 stops26h 02m
Wed 9/3010:55 am -
1 stop22h 48m
Deal found 8/26![United Airlines logo]()
$1,265
This oojo deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 9/233:34 pm -
1 stop24h 21m
Wed 10/71:00 pm -
1 stop21h 20m
Deal found 8/25![Qantas Airways logo]()
$1,326
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” 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 8/26![United Airlines logo]()
$1,334
This American Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 9/2310:14 am -
1 stop29h 41m
Wed 10/71:00 pm -
1 stop26h 42m
Deal found 8/24![American Airlines logo]()
$1,346
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 9/243:12 pm -
2 stops26h 03m
Thu 10/110:55 am -
1 stop22h 48m
Deal found 8/24![United Airlines logo]()
$1,364
This Trip.com deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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.
Mon 9/2812:17 pm -
3 stops32h 33m
Sun 10/182:15 pm -
3 stops38h 20m
Deal found 8/23![Multiple Airlines logo]()
$1,216
This American Airlines deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:30 am -
1 stop33h 35m
Sun 10/181:00 pm -
1 stop26h 42m
Deal found 8/23![American Airlines logo]()
$1,406
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 26, 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 26, 2026.
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” 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 10/142:38 pm -
2 stops26h 12m
Deal found 8/25![Delta logo]()
$608
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 10/177:42 pm -
3 stops56h 28m
Deal found 8/24![Multiple Airlines logo]()
$642
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:27 am -
2 stops30h 48m
Deal found 8/26![United Airlines logo]()
$661
This Kiwi.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 9/1212:17 pm -
3 stops39h 53m
Deal found 8/22![Multiple Airlines logo]()
$699
This Kiwi.com deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 10/225:53 pm -
3 stops57h 32m
Deal found 8/22![Multiple Airlines logo]()
$715
This Mytrip deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:35 am -
2 stops32h 20m
Deal found 8/24![Multiple Airlines logo]()
$731
This oojo deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” 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 2/196:30 am -
1 stop30h 55m
Deal found 8/22![Qantas Airways logo]()
$763
This United Airlines deal was found by Cheapflights users on 8/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/191:08 pm -
3 stops26h 57m
Deal found 8/22![United Airlines logo]()
$768
This United Airlines deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” 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 10/177:08 am -
1 stop32h 47m
Deal found 8/24![United Airlines logo]()
$786
This Air Canada deal was found by Cheapflights users on 8/23. Clicking the “Pick Dates” 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 8/23![Multiple Airlines logo]()
$826
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:00 am -
1 stop33h 45m
Deal found 8/24![Qantas Airways logo]()
$839
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:58 pm -
3 stops51h 12m
Deal found 8/24![Multiple Airlines logo]()
$850
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 26, 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 7,457,451 searches. Data last updated August 26, 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 10/27
12:00 pm-7:00 am
2 stops27h 00m
Melbourne
Wed 11/11
10:10 am-9:18 pm
2 stops28h 08m
$1,164
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Wed 9/23
12:00 pm-7:50 am
2 stops28h 50m
Melbourne
Wed 9/30
10:00 am-7:58 pm
2 stops24h 58m
$1,164
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Tue 10/6
11:10 am-9:15 am
2 stops30h 05m
Melbourne
Tue 10/13
11:55 am-6:43 pm
1 stop22h 48m
$1,268
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
Quickest round-trip
St. LouisBrisbane
STL Lambert-St Louis - BNE Brisbane
STLBNE
Lambert-St Louis
Mon 2/8
7:06 pm-7:30 am
1 stop20h 24m
Brisbane
Fri 2/12
11:20 am-9:55 pm
1 stop26h 35m
$1,297
St. LouisMelbourne
STL Lambert-St Louis - AVV Melbourne Avalon
STLAVV
Lambert-St Louis
Tue 10/27
4:05 pm-3:35 pm
3 stops55h 30m
Melbourne Avalon
Wed 11/11
6:00 am-3:26 pm
3 stops50h 26m
$1,334
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Sun 10/4
6:15 am-7:50 am
2 stops33h 35m
Sydney Kingsford Smith
Sun 10/11
10:15 am-12:44 am
2 stops30h 29m
$1,334
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 9/23
3:32 pm-7:00 am
2 stops24h 28m
Sydney Kingsford Smith
Wed 10/7
11:20 am-6:43 pm
1 stop23h 23m
$1,334
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 9/23
3:52 pm-6:50 am
2 stops23h 58m
Sydney Kingsford Smith
Wed 10/7
10:15 am-6:15 pm
2 stops24h 00m
$1,334
St. LouisPerth
STL Lambert-St Louis - PER Perth
STLPER
Lambert-St Louis
Sun 11/1
8:13 pm-6:55 am
2 stops44h 42m
Perth
Sun 11/15
12:25 am-11:45 pm
2 stops37h 20m
$1,450
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-PER
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-SYD
STL-PER
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 $1,548). 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 26, 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.
Entertainment
7.2
Food
7.0
Boarding
7.7
Comfort
7.4
Overall
7.5
Crew
8.1
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Entertainment
7.2
Food
7.0
Boarding
7.7
Comfort
7.4
Overall
7.5
Crew
8.1
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Entertainment
7.2
Food
7.0
Boarding
7.7
Comfort
7.4
Overall
7.5
Crew
8.1
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Entertainment
7.2
Food
7.0
Boarding
7.7
Comfort
7.4
Overall
7.5
Crew
8.1
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Entertainment
7.2
Food
7.0
Boarding
7.7
Comfort
7.4
Overall
7.5
Crew
8.1
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 26, 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 26, 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$1,372 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,086 | Average$1,418 | FlexibilityNo cancel fee | On-time71% |