$609+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SYD
Jul 6 — Jul 131
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
Best
Last-minute
One-way
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 June 6, 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 June 6, 2026.
This American Airlines deal was found by Cheapflights users on 6/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:43 pm
STL
- MEL
2 stops26h 02m
American Airlines
Tue 11/312:00 pm
MEL
- STL
1 stop20h 29m
American Airlines
Deal found 6/4![American Airlines logo]()
$1,086
This KAYAK deal was found by Cheapflights users on 6/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/307:23 pm
STL
- MEL
1 stop21h 52m
Multiple Airlines
Fri 7/3110:55 am
MEL
- STL
1 stop22h 22m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$1,092
This United Airlines deal was found by Cheapflights users on 6/4. 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.
Tue 6/306:01 am
STL
- MEL
2 stops35h 14m
United Airlines
Fri 7/3110:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 6/4![United Airlines logo]()
$1,093
This American Airlines deal was found by Cheapflights users on 6/2. 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.
Wed 10/216:30 am
STL
- MEL
1 stop32h 15m
American Airlines
Wed 11/411:15 pm
MEL
- STL
2 stops26h 12m
American Airlines
Deal found 6/2![American Airlines logo]()
$1,094
This oojo deal was found by Cheapflights users on 6/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:30 am
STL
- MEL
1 stop35h 00m
Qantas Airways
Wed 11/1111:15 pm
MEL
- STL
1 stop41h 27m
Qantas Airways
Deal found 6/4![Qantas Airways logo]()
$1,097
This KAYAK deal was found by Cheapflights users on 6/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/208:42 am
STL
- MEL
1 stop32h 33m
ANA
Sun 8/3010:55 am
MEL
- STL
1 stop22h 44m
ANA
Deal found 6/5![ANA logo]()
$1,100
This United Airlines deal was found by Cheapflights users on 6/2. 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.
Wed 7/17:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Tue 7/710:10 am
MEL
- STL
2 stops47h 07m
United Airlines
Deal found 6/2![United Airlines logo]()
$1,116
This Air Canada deal was found by Cheapflights users on 6/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/812:10 pm
STL
- SYD
2 stops52h 10m
Air Canada
Sun 8/169:20 am
SYD
- STL
2 stops48h 22m
Air Canada
Deal found 6/6![Air Canada logo]()
$1,190
This American Airlines deal was found by Cheapflights users on 6/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2712:43 pm
STL
- MEL
1 stop24h 17m
American Airlines
Wed 11/1111:15 pm
MEL
- STL
2 stops26h 43m
American Airlines
Deal found 6/4![American Airlines logo]()
$1,236
This oojo deal was found by Cheapflights users on 6/6. 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.
Fri 10/306:51 pm
STL
- BNE
1 stop20h 39m
Qantas Airways
Thu 11/129:15 am
BNE
- STL
1 stop22h 14m
Qantas Airways
Deal found 6/6![Qantas Airways logo]()
$1,266
This FlightHub deal was found by Cheapflights users on 6/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:10 am
STL
- SYD
2 stops35h 10m
Air Canada
Wed 10/710:20 am
SYD
- STL
3 stops41h 53m
Air Canada
Deal found 6/2![Air Canada logo]()
$1,295
This Booking.com deal was found by Cheapflights users on 6/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/168:50 am
STL
- SYD
2 stops31h 30m
Air Canada
Mon 8/249:20 am
SYD
- STL
2 stops46h 14m
Air Canada
Deal found 6/3![Air Canada logo]()
$1,312
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 June 6, 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 June 6, 2026.
This United Airlines deal was found by Cheapflights users on 6/2. 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.
Wed 7/16:01 am
STL
- MEL
2 stops35h 14m
United Airlines
Tue 7/710:10 am
MEL
- STL
2 stops47h 07m
United Airlines
Deal found 6/2![United Airlines logo]()
$1,116
This oojo deal was found by Cheapflights users on 6/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/411:39 am
STL
- BNE
1 stop26h 51m
Qantas Airways
Sat 11/149:15 am
BNE
- STL
1 stop22h 14m
Qantas Airways
Deal found 6/3![Qantas Airways logo]()
$1,304
This Air Canada deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 10/1312:10 pm
STL
- SYD
2 stops28h 10m
Air Canada
Fri 11/1311:20 am
SYD
- STL
2 stops45h 10m
Air Canada
Deal found 6/1![Air Canada logo]()
$1,335
This Air Canada deal was found by Cheapflights users on 6/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/58:55 am
STL
- AVV
3 stops37h 15m
Multiple Airlines
Fri 10/96:00 am
AVV
- STL
3 stops48h 00m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$1,440
This oojo deal was found by Cheapflights users on 6/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:00 am
STL
- PER
2 stops45h 45m
Qatar Airways
Sun 11/1510:45 pm
PER
- STL
2 stops39h 11m
Qatar Airways
Deal found 6/4![Qatar Airways logo]()
$1,455
This American Airlines deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 10/136:30 am
STL
- SYD
1 stop33h 00m
American Airlines
Fri 11/132:05 pm
SYD
- STL
1 stop22h 25m
American Airlines
Deal found 6/1![American Airlines logo]()
$1,467
This United Airlines deal was found by Cheapflights users on 6/3. 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.
Sun 8/163:35 pm
STL
- SYD
2 stops24h 25m
United Airlines
Mon 8/2410:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 6/3![United Airlines logo]()
$1,332
This FlightHub deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:30 am
STL
- SYD
2 stops35h 15m
Qantas Airways
Wed 11/182:05 pm
SYD
- STL
1 stop19h 35m
Qantas Airways
Deal found 6/1![Qantas Airways logo]()
$1,392
This Air Canada deal was found by Cheapflights users on 6/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:15 pm
STL
- AVV
3 stops63h 00m
Multiple Airlines
Wed 11/116:00 am
AVV
- STL
3 stops50h 30m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$1,440
This United Airlines deal was found by Cheapflights users on 6/2. 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 6/301:13 pm
STL
- SYD
2 stops26h 47m
United Airlines
Tue 7/79:30 am
SYD
- STL
2 stops23h 43m
United Airlines
Deal found 6/2![United Airlines logo]()
$1,337
This Qantas Airways deal was found by Cheapflights users on 6/2. 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.
Wed 9/235:00 pm
STL
- SYD
1 stop22h 55m
Qantas Airways
Wed 10/71:00 pm
SYD
- STL
1 stop21h 14m
Qantas Airways
Deal found 6/2![Qantas Airways logo]()
$1,406
This Air Canada deal was found by Cheapflights users on 6/3. 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.
Tue 10/202:40 pm
STL
- AVV
3 stops33h 25m
Multiple Airlines
Tue 11/36:00 am
AVV
- STL
3 stops50h 30m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$1,440
This United Airlines deal was found by Cheapflights users on 6/4. 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.
Sat 7/187:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Sat 7/256:00 am
MEL
- STL
2 stops27h 17m
United Airlines
Deal found 6/4![United Airlines logo]()
$1,376
This Air Canada deal was found by Cheapflights users on 6/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/218:55 am
STL
- AVV
3 stops37h 15m
Multiple Airlines
Wed 11/46:00 am
AVV
- STL
3 stops50h 30m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$1,441
This Expedia deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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.
Fri 7/317:22 pm
STL
- SYD
2 stops45h 38m
Qantas Airways
Fri 8/79:10 am
SYD
- STL
1 stop28h 49m
Qantas Airways
Deal found 6/1![Qantas Airways logo]()
$1,480
This United Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/87:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Sun 8/1610:20 am
SYD
- STL
1 stop23h 19m
United Airlines
Deal found 6/6![United Airlines logo]()
$1,381
This Air Canada deal was found by Cheapflights users on 6/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/202:40 pm
STL
- MEL
3 stops29h 30m
Multiple Airlines
Tue 11/37:25 am
MEL
- STL
3 stops49h 05m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$1,454
This Air Canada deal was found by Cheapflights users on 6/5. 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.
Mon 7/208:55 am
STL
- BNE
2 stops31h 10m
Air Canada
Mon 7/2710:00 am
BNE
- STL
2 stops47h 42m
Air Canada
Deal found 6/5![Air Canada logo]()
$2,007
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Fri 7/33:22 pm
STL
- SYD
2 stops24h 33m
United Airlines
Fri 7/1010:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 6/5![United Airlines logo]()
$1,422
This Qantas Airways deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 11/186:13 pm
STL
- CNS
2 stops30h 42m
Qantas Airways
Sun 11/222:55 pm
CNS
- STL
2 stops37h 42m
Qantas Airways
Deal found 6/1![Qantas Airways logo]()
$1,713
This United Airlines deal was found by Cheapflights users on 6/2. 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.
Wed 7/157:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Wed 7/229:30 am
MEL
- STL
2 stops29h 27m
United Airlines
Deal found 6/2![United Airlines logo]()
$1,427
This Qatar Airways deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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.
Fri 9/181:49 pm
STL
- PER
2 stops39h 46m
Qatar Airways
Mon 9/2110:45 pm
PER
- STL
2 stops34h 59m
Qatar Airways
Deal found 6/1![Qatar Airways logo]()
$2,382
This Qantas Airways deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 8/86:00 am
STL
- CBR
2 stops42h 30m
Qantas Airways
Wed 8/1211:35 am
CBR
- STL
2 stops50h 24m
Qantas Airways
Deal found 6/1![Qantas Airways logo]()
$1,807
This FlightHub deal was found by Cheapflights users on 6/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/14:15 pm
STL
- PER
3 stops62h 05m
Air Canada
Sun 11/1510:55 pm
PER
- STL
3 stops54h 35m
Air Canada
Deal found 6/4![Air Canada logo]()
$2,412
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Mon 7/207:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Tue 7/2810:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 6/5![United Airlines logo]()
$1,532
This Cathay Pacific deal was found by Cheapflights users on 6/3. 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.
Tue 10/277:00 am
STL
- MEL
2 stops32h 10m
Multiple Airlines
Wed 11/114:30 pm
MEL
- STL
3 stops46h 59m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$1,965
This United Airlines deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 12/27:06 pm
STL
- HBA
2 stops29h 04m
United Airlines
Sun 12/69:20 pm
HBA
- STL
2 stops37h 33m
United Airlines
Deal found 6/1![United Airlines logo]()
$1,547
This oojo deal was found by Cheapflights users on 6/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:30 am
STL
- AVV
2 stops40h 50m
Qantas Airways
Tue 11/310:20 am
AVV
- STL
2 stops23h 20m
Qantas Airways
Deal found 6/3![Qantas Airways logo]()
$1,945
This Air New Zealand deal was found by Cheapflights users on 6/5. 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.
Wed 10/211:29 pm
STL
- MEL
3 stops29h 26m
Multiple Airlines
Wed 11/410:35 am
MEL
- STL
2 stops25h 03m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,988
This United Airlines deal was found by Cheapflights users on 6/4. 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.
Mon 8/37:23 pm
STL
- BNE
1 stop20h 07m
United Airlines
Mon 8/316:55 am
BNE
- STL
2 stops26h 44m
United Airlines
Deal found 6/4![United Airlines logo]()
$1,625
Last-minute flights from St. Louis to AustraliaDiscover last-minute flight deals from St. Louis to Australia. Data last updated June 6, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Australia. Data last updated June 6, 2026 and is based on user searches.
This KAYAK deal was found by Cheapflights users on 6/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:29 pm
STL
- SYD
2 stops46h 31m
Air New Zealand
Sat 6/209:30 am
SYD
- STL
2 stops26h 27m
Air New Zealand
Deal found 6/2![Air New Zealand logo]()
$1,403
This United Airlines deal was found by Cheapflights users on 6/3. 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.
Sun 6/71:13 pm
STL
- SYD
2 stops26h 47m
United Airlines
Sun 6/219:30 am
SYD
- STL
2 stops26h 12m
United Airlines
Deal found 6/3![United Airlines logo]()
$1,324
This FlightHub deal was found by Cheapflights users on 6/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/91:05 pm
STL
- BNE
2 stops27h 00m
Air Canada
Tue 6/1610:15 am
BNE
- STL
2 stops49h 10m
Air Canada
Deal found 6/4![Air Canada logo]()
$1,413
This FlightHub deal was found by Cheapflights users on 6/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/271:20 pm
STL
- BNE
2 stops50h 45m
Air Canada
Sun 7/510:00 am
BNE
- STL
2 stops37h 39m
Air Canada
Deal found 6/2![Air Canada logo]()
$1,385
This KAYAK deal was found by Cheapflights users on 6/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/307:23 pm
STL
- MEL
1 stop21h 52m
Multiple Airlines
Fri 7/3110:55 am
MEL
- STL
1 stop22h 22m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$1,092
This United Airlines deal was found by Cheapflights users on 6/4. 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.
Tue 6/306:01 am
STL
- MEL
2 stops35h 14m
United Airlines
Fri 7/3110:55 am
MEL
- STL
1 stop22h 22m
United Airlines
Deal found 6/4![United Airlines logo]()
$1,093
This United Airlines deal was found by Cheapflights users on 6/2. 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 6/301:13 pm
STL
- SYD
2 stops26h 47m
United Airlines
Tue 7/79:30 am
SYD
- STL
2 stops23h 43m
United Airlines
Deal found 6/2![United Airlines logo]()
$1,337
This United Airlines deal was found by Cheapflights users on 6/2. 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.
Wed 7/17:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Tue 7/710:10 am
MEL
- STL
2 stops47h 07m
United Airlines
Deal found 6/2![United Airlines logo]()
$1,116
This United Airlines deal was found by Cheapflights users on 6/3. 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.
Wed 7/16:01 am
STL
- SYD
2 stops33h 54m
United Airlines
Wed 7/810:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 6/3![United Airlines logo]()
$1,332
This United Airlines deal was found by Cheapflights users on 6/3. 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.
Thu 7/26:01 am
STL
- SYD
2 stops33h 54m
United Airlines
Sun 7/1210:20 am
SYD
- STL
1 stop22h 57m
United Airlines
Deal found 6/3![United Airlines logo]()
$1,382
This United Airlines deal was found by Cheapflights users on 6/4. 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.
Sat 7/187:23 pm
STL
- MEL
1 stop21h 52m
United Airlines
Sat 7/256:00 am
MEL
- STL
2 stops27h 17m
United Airlines
Deal found 6/4![United Airlines logo]()
$1,376
This CheapOair deal was found by Cheapflights users on 6/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/204:48 pm
STL
- SYD
2 stops23h 32m
Air Canada
Tue 7/289:20 am
SYD
- STL
3 stops51h 06m
Air Canada
Deal found 6/5![Air Canada logo]()
$1,349
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 June 6, 2026.
Search for one-way flight options from St. Louis to Australia. Find affordable one-way fares based on user searches. Data last updated June 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/3. 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.
Tue 9/18:08 pm
STL
- SYD
3 stops56h 02m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$609
This Kiwi.com deal was found by Cheapflights users on 6/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:00 am
STL
- SYD
2 stops37h 45m
Qantas Airways
Deal found 6/6![Qantas Airways logo]()
$701
This oojo deal was found by Cheapflights users on 6/6. 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.
Sat 8/16:37 am
STL
- SYD
2 stops37h 08m
Qantas Airways
Deal found 6/6![Qantas Airways logo]()
$711
This United Airlines deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 6/147:23 pm
STL
- SYD
1 stop20h 32m
United Airlines
Deal found 6/1![United Airlines logo]()
$755
This Kiwi.com deal was found by Cheapflights users on 6/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/83:41 pm
STL
- SYD
3 stops50h 59m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$757
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Sun 8/236:33 pm
STL
- BNE
3 stops45h 12m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$759
This Delta deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 6/203:57 pm
STL
- SYD
2 stops47h 53m
Delta
Deal found 6/1![Delta logo]()
$779
This FlightHub deal was found by Cheapflights users on 6/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2312:10 pm
STL
- BNE
2 stops51h 55m
Air Canada
Deal found 6/5![Air Canada logo]()
$790
This Kiwi.com deal was found by Cheapflights users on 6/2. 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.
Fri 7/37:03 pm
STL
- SYD
2 stops45h 27m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$795
This oojo deal was found by Cheapflights users on 6/2. 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.
Fri 7/35:13 pm
STL
- SYD
1 stop22h 42m
Qantas Airways
Deal found 6/2![Qantas Airways logo]()
$800
This Ovago deal was found by Cheapflights users on 6/6. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/88:55 am
STL
- SYD
1 stop31h 25m
Singapore Airlines
Deal found 6/6![Singapore Airlines logo]()
$801
This Delta deal was found by Cheapflights users on 6/1. Clicking the “Pick Dates” 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 6/189:21 am
STL
- SYD
2 stops30h 29m
Delta
Deal found 6/1![Delta logo]()
$820
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 June 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,086 (American Airlines) |
One-way from | $609 (Kiwi.com) |
Popular in | December |
Cheapest in | March |
Average price | $1,560 |
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 June 6, 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 - MEL
STLMEL
Lambert-St Louis
Wed 7/1
6:01 am-8:15 am
2 stops35h 14m
Melbourne
Tue 7/7
10:10 am-6:17 pm
2 stops47h 07m
$1,116
St. LouisBrisbane
STL - BNE
STLBNE
Lambert-St Louis
Wed 11/4
11:39 am-6:30 am
1 stop26h 51m
Brisbane
Sat 11/14
9:15 am-3:29 pm
1 stop22h 14m
$1,304
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sun 8/16
3:35 pm-7:00 am
2 stops24h 25m
Sydney Kingsford Smith
Mon 8/24
10:20 am-6:39 pm
1 stop23h 19m
$1,332
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Tue 10/13
12:10 pm-8:20 am
2 stops28h 10m
Sydney Kingsford Smith
Fri 11/13
11:20 am-3:30 pm
2 stops45h 10m
$1,335
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Tue 6/30
1:13 pm-7:00 am
2 stops26h 47m
Sydney Kingsford Smith
Tue 7/7
9:30 am-6:13 pm
2 stops23h 43m
$1,337
St. LouisMelbourne
STL - MEL
STLMEL
Lambert-St Louis
Sat 7/18
7:23 pm-8:15 am
1 stop21h 52m
Melbourne
Sat 7/25
6:00 am-6:17 pm
2 stops27h 17m
$1,376
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Sat 8/8
7:23 pm-6:55 am
1 stop20h 32m
Sydney Kingsford Smith
Sun 8/16
10:20 am-6:39 pm
1 stop23h 19m
$1,381
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Tue 10/13
6:30 am-9:45 am
2 stops35h 15m
Sydney Kingsford Smith
Wed 11/18
2:05 pm-4:40 pm
1 stop19h 35m
$1,392
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Wed 9/23
5:00 pm-6:55 am
1 stop22h 55m
Sydney Kingsford Smith
Wed 10/7
1:00 pm-6:14 pm
1 stop21h 14m
$1,406
St. LouisSydney
STL - SYD
STLSYD
Lambert-St Louis
Fri 7/3
3:22 pm-6:55 am
2 stops24h 33m
Sydney Kingsford Smith
Fri 7/10
10:20 am-6:17 pm
1 stop22h 57m
$1,422
Showing 1-10 of 48 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-SYD
STL-BNE
STL-MEL
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-SYD
STL-BNE
STL-MEL
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 $310). Flying from St. Louis to Australia in June is currently the most expensive (average of $1,225). 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 June 6, 2026.
Read reviews from past customers who have flown Fiji Airways,Qantas Airways, andUnited 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.
Boarding
8.2
Food
7.5
Overall
8.1
Entertainment
7.5
Comfort
8.1
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Boarding
8.2
Food
7.5
Overall
8.1
Entertainment
7.5
Comfort
8.1
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Boarding
8.2
Food
7.5
Overall
8.1
Entertainment
7.5
Comfort
8.1
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Boarding
8.2
Food
7.5
Overall
8.1
Entertainment
7.5
Comfort
8.1
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Boarding
8.2
Food
7.5
Overall
8.1
Entertainment
7.5
Comfort
8.1
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
Boarding
8.2
Food
7.5
Overall
8.1
Entertainment
7.5
Comfort
8.1
Crew
8.6
Reviews
1 / 19
8.0
ExcellentPaul,Mar 2026
YVR - NAN
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top regions
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 June 6, 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 5 airlines flying from St. Louis to Australia
Discover the top 5 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 June 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$857 | Average$1,312 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$887 | Average$1,264 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$894 | Average$907 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$1,029 | Average$1,416 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$1,056 | Average$1,363 | FlexibilityNo cancel fee | On-time71% |