Cheap flights from St. Louis to Sydney from $941
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sydney departing on 7/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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American Airlines flights from St. Louis to Sydney
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Qantas Airways flights from St. Louis to Sydney
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How to get the cheapest flight ticket from St. Louis to Sydney
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Sydney?
In general, August is the cheapest month to fly from St. Louis to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,275. If you are unable to visit Sydney during the month of August, then departing from St. Louis during the month May is also very affordable. Most momondo users find prices during this month for around $1,383.
What is the cheapest day to depart on your flight to Sydney?
The cheapest day to depart from St. Louis to Sydney is on a Wednesday when prices can be found for as low as $1,392. The most expensive day to fly to Sydney is Saturday, with ticket prices averaging around $1,518.
What is the cheapest time of day to depart on your flight to Sydney?
According to our data, the cheapest time of day to fly to Sydney is in the evening. momondo users have found flights departing from St. Louis to Sydney in the evening for as low as $1,440. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly at noon, with an average ticket price of $1,882. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.
How far in advance should I book a flight to Sydney?
You are more likely to see cheaper flights to Sydney from St. Louis when booking 19 weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,474 when searching 19 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from St. Louis for as low as $1,272 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Sydney Kingsford Smith?
United Airlines is the most popular carrier operating from Lambert-St Louis to Sydney Kingsford Smith
What airlines fly to Sydney?
United Airlines, Qantas Airways and American Airlines are the top three most popular airlines that fly to Sydney from St. Louis according to our data. United Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Sydney. Keep in mind that there are 6 different airlines that fly to Sydney on a routine basis, so you have a few additional options to choose from.
When to book flights from St. Louis to Sydney
Cheap St. Louis to Sydney (STL to SYD) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sydney
How far is Lambert-St Louis to Sydney Kingsford Smith by plane?
Lambert-St Louis and Sydney Kingsford Smith are 9057.2 mi apart from one another. A reasonable flight in good conditions will take 20h 50m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Sydney Kingsford Smith Airport?
Prices for flights from Lambert-St Louis Airport to Sydney Kingsford Smith Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Sydney Kingsford Smith Airport?
The number of operators available for flights from Lambert-St Louis Airport to Sydney Kingsford Smith Airport is 6 as of June 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Sydney Kingsford Smith Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sydney Kingsford Smith Airport.
What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?
The travel and health documents you'll need for your trip to Sydney Kingsford Smith Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sydney Kingsford Smith Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Sydney?
Based on momondo bookings for this flight route, the most popular airline on flight routes from St. Louis to Sydney is United Airlines (39% of total bookings). The next most popular airlines are Qantas Airways (29%), American Airlines (17%), and Air Canada (7%).
Best airlines flying from St. Louis to Sydney
Compare and see reviews for airlines that fly from St. Louis to Sydney with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $962 | Free Cancellation | Rating 7.1 9,553 reviews | |||
| PriceFrom $1,132 | Free Cancellation | Rating 8.0 199 reviews | |||
| PriceFrom $1,173 | Free Cancellation | Rating 8.0 483 reviews | |||
| PriceFrom $1,193 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $1,204 | Free Cancellation | Rating 7.4 8,798 reviews | |||
| PriceFrom $1,260 | Free Cancellation | Rating 7.5 856 reviews |
Traveling to a place near Sydney?
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Why should I use momondo to find a flight deal from St. Louis to Sydney?
It is quick and easy to find St. Louis to Sydney flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sydney that suits you.
Can I find flights from St. Louis to Sydney with flexible booking policies on momondo?
Yes. All flights to Sydney from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from St. Louis to Sydney?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Sydney from St. Louis.
I’m not ready to book a flight from St. Louis to Sydney right now. Can momondo alert me if prices change?
If you are not ready to book a flight from St. Louis to Sydney now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sydney and let you know when they change.