$558+ Cheap flights from St. Louis (STL) to Australia
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Oct 7 — Oct 141
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 September 7, 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 September 7, 2026.
This Bravofly deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:04 am -
1 stop31h 56m
Thu 10/296:30 pm -
2 stops38h 48m
Deal found 9/6![Qantas Airways logo]()
$1,121
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 9/4![Delta logo]()
$1,164
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 10/203:12 pm -
2 stops26h 03m
Wed 11/412:45 pm -
1 stop22h 20m
Deal found 9/3![United Airlines logo]()
$1,169
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected ” under the list of providers to see comparable flight deals.
Tue 10/203:12 pm -
2 stops26h 03m
Tue 11/312:45 pm -
1 stop22h 20m
Deal found 9/7![United Airlines logo]()
$1,170
This American Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:12 am -
2 stops28h 33m
Thu 10/2910:45 pm -
2 stops25h 52m
Deal found 9/7![American Airlines logo]()
$1,246
This American Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:04 am -
1 stop31h 56m
Thu 10/299:40 am -
1 stop19h 50m
Deal found 9/6![American Airlines logo]()
$1,288
This American Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 10/202:31 pm -
2 stops23h 29m
Tue 10/271:10 pm -
1 stop25h 36m
Deal found 9/5![American Airlines logo]()
$1,291
This Air Canada deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 10/2012:10 pm -
2 stops27h 55m
Tue 10/279:45 am -
2 stops44h 38m
Deal found 9/5![Air Canada logo]()
$1,293
This American Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 9/6![American Airlines logo]()
$1,303
This oojo deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:47 pm -
1 stop26h 08m
Wed 10/281:05 pm -
1 stop19h 58m
Deal found 9/6![Qantas Airways logo]()
$1,327
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:29 pm -
2 stops26h 26m
Wed 10/289:15 am -
1 stop20h 58m
Deal found 9/6![United Airlines logo]()
$1,330
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:15 am -
2 stops33h 40m
Wed 11/189:15 am -
1 stop24h 35m
Deal found 9/6![United Airlines logo]()
$1,335
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 September 7, 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 September 7, 2026.
This Qantas Airways deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 2/85:18 pm -
1 stop21h 12m
Fri 2/126:30 pm -
2 stops39h 41m
Deal found 9/4![Qantas Airways logo]()
$1,087
This Delta deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 2/2312:30 pm -
2 stops26h 30m
Wed 3/179:10 am -
2 stops30h 08m
Deal found 9/3![Delta logo]()
$1,164
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/234:17 pm -
2 stops24h 13m
Wed 3/1711:45 am -
1 stop22h 08m
Deal found 9/3![United Airlines logo]()
$1,165
This Air Canada deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 10/2012:10 pm -
2 stops27h 55m
Tue 10/279:45 am -
2 stops44h 38m
Deal found 9/5![Air Canada logo]()
$1,293
This Air New Zealand deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air New Zealand is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/38:05 am -
3 stops31h 30m
Wed 2/242:05 pm -
3 stops26h 14m
Deal found 9/7![Multiple Airlines logo]()
$1,342
This American Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 10/132:31 pm -
2 stops24h 59m
Wed 11/182:05 pm -
1 stop23h 15m
Deal found 9/2![American Airlines logo]()
$1,351
This Cathay Pacific deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 9/276:43 pm -
2 stops44h 27m
Wed 3/38:45 am -
2 stops30h 20m
Deal found 9/3![Cathay Pacific logo]()
$1,614
This Qatar Airways deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 11/911:35 am -
2 stops41h 10m
Fri 11/1310:45 pm -
2 stops37h 39m
Deal found 9/2![Qatar Airways logo]()
$1,939
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 9/4![Delta logo]()
$1,164
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:29 pm -
2 stops27h 46m
Tue 11/312:45 pm -
2 stops25h 14m
Deal found 9/7![United Airlines logo]()
$1,170
This Qantas Airways deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/25:18 pm -
2 stops24h 47m
Sat 2/272:05 pm -
1 stop21h 06m
Deal found 9/2![Qantas Airways logo]()
$1,273
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2711:00 am -
2 stops30h 30m
Wed 11/1112:45 pm -
1 stop22h 20m
Deal found 9/7![United Airlines logo]()
$1,170
This Delta deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 2/2612:30 pm -
2 stops26h 30m
Mon 3/810:10 am -
2 stops30h 29m
Deal found 9/2![Delta logo]()
$1,215
This Air Canada deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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.
Fri 2/264:05 pm -
3 stops53h 00m
Mon 3/86:00 am -
3 stops50h 26m
Deal found 9/3![Multiple Airlines logo]()
$1,372
This Qantas Airways deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/65:18 pm -
1 stop21h 12m
Wed 2/249:40 am -
1 stop24h 31m
Deal found 9/2![Qantas Airways logo]()
$1,313
This United Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 2/267:06 pm -
1 stop22h 24m
Mon 3/812:45 pm -
1 stop26h 10m
Deal found 9/4![United Airlines logo]()
$1,215
This Air New Zealand deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 stops28h 00m
Wed 11/1112:10 pm -
3 stops25h 49m
Deal found 9/5![Multiple Airlines logo]()
$1,412
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/28:30 am -
1 stop31h 00m
Mon 2/2211:20 am -
1 stop26h 35m
Deal found 9/2![United Airlines logo]()
$1,258
This United deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/47:08 am -
2 stops47h 57m
Sun 10/116:40 pm -
3 stops40h 03m
Deal found 9/4![Multiple Airlines logo]()
$1,455
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 9/6![Delta logo]()
$1,515
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/28:30 am -
1 stop31h 00m
Thu 2/2511:20 am -
1 stop26h 35m
Deal found 9/2![United Airlines logo]()
$1,258
This Air Canada deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:05 pm -
3 stops55h 30m
Wed 11/116:00 am -
3 stops50h 26m
Deal found 9/7![Multiple Airlines logo]()
$1,484
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 2/58:30 am -
1 stop31h 00m
Fri 2/2611:20 am -
1 stop26h 35m
Deal found 9/2![United Airlines logo]()
$1,258
This Qantas Airways deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/82:54 pm -
1 stop23h 01m
Wed 11/119:55 am -
2 stops27h 47m
Deal found 9/6![Qantas Airways logo]()
$1,675
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 stops25h 25m
Wed 10/710:15 am -
2 stops29h 39m
Deal found 9/5![Delta logo]()
$1,565
This Cathay Pacific deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:04 am -
2 stops35h 46m
Wed 10/2812:25 am -
2 stops36h 17m
Deal found 9/7![Multiple Airlines logo]()
$1,496
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 1/313:00 pm -
2 stops24h 30m
Sat 2/2711:20 am -
2 stops21h 36m
Deal found 9/2![United Airlines logo]()
$1,263
This Ovago deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/510:12 am -
3 stops35h 58m
Mon 10/126:00 am -
3 stops33h 42m
Deal found 9/7![Qantas Airways logo]()
$1,715
This Cathay Pacific deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:29 pm -
2 stops47h 26m
Mon 11/168:30 am -
2 stops47h 47m
Deal found 9/6![Multiple Airlines logo]()
$1,501
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 1/318:30 am -
1 stop31h 00m
Wed 2/246:05 am -
2 stops31h 50m
Deal found 9/2![United Airlines logo]()
$1,281
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated September 7, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated September 7, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:15 am -
2 stops33h 40m
Wed 11/189:15 am -
1 stop24h 35m
Deal found 9/6![United Airlines logo]()
$1,335
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 10/203:12 pm -
2 stops26h 03m
Wed 11/412:45 pm -
1 stop22h 20m
Deal found 9/3![United Airlines logo]()
$1,169
This United Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:12 pm -
2 stops26h 03m
Tue 11/312:45 pm -
1 stop22h 20m
Deal found 9/7![United Airlines logo]()
$1,170
This American Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 10/202:31 pm -
2 stops23h 29m
Tue 10/271:10 pm -
1 stop25h 36m
Deal found 9/5![American Airlines logo]()
$1,291
This Air Canada deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 10/2012:10 pm -
2 stops27h 55m
Tue 10/279:45 am -
2 stops44h 38m
Deal found 9/5![Air Canada logo]()
$1,293
This American Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 9/6![American Airlines logo]()
$1,303
This oojo deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:47 pm -
1 stop26h 08m
Wed 10/281:05 pm -
1 stop19h 58m
Deal found 9/6![Qantas Airways logo]()
$1,327
This United Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:29 pm -
2 stops26h 26m
Wed 10/289:15 am -
1 stop20h 58m
Deal found 9/6![United Airlines logo]()
$1,330
This Bravofly deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:04 am -
1 stop31h 56m
Thu 10/296:30 pm -
2 stops38h 48m
Deal found 9/6![Qantas Airways logo]()
$1,121
This American Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:12 am -
2 stops28h 33m
Thu 10/2910:45 pm -
2 stops25h 52m
Deal found 9/7![American Airlines logo]()
$1,246
This American Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:04 am -
1 stop31h 56m
Thu 10/299:40 am -
1 stop19h 50m
Deal found 9/6![American Airlines logo]()
$1,288
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 9/4![Delta logo]()
$1,164
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 September 7, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated September 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 11/27:59 pm -
2 stops41h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$558
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 10/168:00 pm -
2 stops42h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$564
This Kiwi.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 9/268:10 pm -
2 stops43h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Multiple Airlines logo]()
$595
This United Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 10/141:29 pm -
2 stops27h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![United Airlines logo]()
$606
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 10/317:59 pm -
3 stops56h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$656
This Kiwi.com deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 10/144:19 pm -
2 stops47h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Multiple Airlines logo]()
$666
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 10/167:08 am -
1 stop34h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![United Airlines logo]()
$683
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2812:17 pm -
3 stops43h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$700
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” 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 9/2710:20 am -
2 stops30h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Multiple Airlines logo]()
$701
This oojo deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” 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 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Qantas Airways logo]()
$703
This United Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” 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 10/136:15 am -
2 stops33h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![United Airlines logo]()
$708
This Kiwi.com deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” 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 10/185:53 pm -
3 stops50h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$719
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 September 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,087 (Qantas Airways) |
One-way from | $558 (Kiwi.com) |
Popular in | December |
Cheapest in | July |
Average price | $1,398 |
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 September 7, 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
Sat 9/26
8:10 pm-6:45 am
2 stops43h 35m
Melbourne
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$595
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Sun 10/11
6:15 am-9:15 am
2 stops35h 00m
Melbourne
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$606
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Wed 10/14
1:29 pm-8:30 am
2 stops27h 01m
Melbourne
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$606
St. LouisMelbourne
STL Lambert-St Louis - MEL Melbourne
STLMEL
Lambert-St Louis
Sun 10/18
7:08 am-9:15 am
1 stop34h 07m
Melbourne
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$622
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Tue 10/27
12:47 pm-6:55 am
1 stop26h 08m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$703
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Tue 10/27
1:08 pm-8:05 am
3 stops26h 57m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$708
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Mon 11/2
8:30 am-7:00 am
1 stop29h 30m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$708
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Wed 10/7
1:29 pm-8:00 am
2 stops26h 31m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$708
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Tue 10/13
11:10 am-7:55 am
2 stops28h 45m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$708
St. LouisSydney
STL Lambert-St Louis - SYD Sydney Kingsford Smith
STLSYD
Lambert-St Louis
Mon 10/5
7:08 am-7:55 am
1 stop32h 47m
Sydney Kingsford Smith
Wed 12/31
12:00 am-8:00 am
Nonstop0h 00m
$726
Showing 1-10 of 53 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Australia
Have a flexible travel schedule? Discover the best time to fly to Australia from St. Louis with our price prediction graph.
STL-MEL
STL-SYD
STL-BNE
STL-AVV
STL-PER
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Australia
STL-AU0
STL-MEL
STL-SYD
STL-BNE
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 $975). Flying from St. Louis to Australia in December is currently the most expensive (average of $1,599). 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 September 7, 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.
Food
7.0
Overall
7.5
Boarding
7.7
Crew
8.1
Entertainment
7.2
Comfort
7.4
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Food
7.0
Overall
7.5
Boarding
7.7
Crew
8.1
Entertainment
7.2
Comfort
7.4
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Food
7.0
Overall
7.5
Boarding
7.7
Crew
8.1
Entertainment
7.2
Comfort
7.4
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Food
7.0
Overall
7.5
Boarding
7.7
Crew
8.1
Entertainment
7.2
Comfort
7.4
Reviews
1 / 20
4.0
OkayRobyn,Aug 2026
LAX - SYD
Food
7.0
Overall
7.5
Boarding
7.7
Crew
8.1
Entertainment
7.2
Comfort
7.4
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 September 7, 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 September 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$857 | Average$1,407 | 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$1,233 | Average$1,549 | FlexibilityNo cancel fee | On-time71% |