St. Louis (STL) → Sydney (SYD)
About St. Louis to Sydney Flights
Discover the best flights from St. Louis to Sydney, covering 14,581 km in approximately 18h 44m. St. Louis (STL) to Sydney (SYD) is one of the major long-haul routes connecting United States and Australia. With 7 major airlines operating this route, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from St. Louis to Sydney.
12-Month Price History
Flight prices from St. Louis to Sydney vary significantly throughout the year. February typically offers the best deals with average prices around $2569, while July sees the highest prices, averaging $4344. Savvy travelers can save up to 41% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
139 days
For best prices
Booking Tips
For the best prices on St. Louis to Sydney flights, we recommend booking 134 days in advance. International flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
United Airlines UA | $2540 | $10840 | $13250 |
Qantas QF | $2580 | $11270 | $17590 |
American Airlines AA | $3130 | $10860 | $13870 |
Virgin Australia VA | $3140 | $9070 | $14390 |
Jetstar Airways JQ | $3140 | $10120 | $17540 |
British Airways BA | $3200 | $9890 | $15400 |
Delta Air Lines DL | $3370 | $11090 | $16220 |
United Airlines
UA
Economy
$2540
Business
$10840
First
$13250
Qantas
QF
Economy
$2580
Business
$11270
First
$17590
American Airlines
AA
Economy
$3130
Business
$10860
First
$13870
Virgin Australia
VA
Economy
$3140
Business
$9070
First
$14390
Jetstar Airways
JQ
Economy
$3140
Business
$10120
First
$17540
British Airways
BA
Economy
$3200
Business
$9890
First
$15400
Delta Air Lines
DL
Economy
$3370
Business
$11090
First
$16220
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Don't Forget Travel Insurance!
Found your flight? Protect your trip with SafetyWing's comprehensive travel insurance. Perfect for trips to Sydney, Australia.
- Medical coverage up to $250,000
- Trip interruption & delays covered
- Lost luggage protection included
From just $45/month • Works in 180+ countries • COVID-19 coverage included
Trusted by 100,000+ travelers
Frequently Asked Questions
How long is the flight from St. Louis to Sydney?
The flight time from St. Louis (STL) to Sydney (SYD) is approximately 18 hours and 44 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between St. Louis and Sydney?
The aerial distance between St. Louis and Sydney is 14,581 kilometers (9,060 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from St. Louis to Sydney?
Several airlines operate flights between St. Louis and Sydney, including Qantas, Jetstar Airways, Virgin Australia and 4 more airlines. Most flights on this route include one or more stops.
What is the cheapest month to fly from St. Louis to Sydney?
Based on historical data, February typically offers the lowest airfares for flights from St. Louis to Sydney. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to Sydney?
For the best prices on St. Louis to Sydney flights, we recommend booking 154 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from St. Louis to Sydney?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of United States traveling to Australia should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between St. Louis and Sydney?
St. Louis operates on America/Chicago time zone, while Sydney is in the Australia/Sydney time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.