Cheap flights from Sydney to St. Louis from $1,129
This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Sydney to St. Louis departing on 8/18. 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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How to get the cheapest flight ticket from Sydney to St. Louis
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 typical price of a round-trip flight between Sydney and St. Louis?
What is the cheapest month to fly to St. Louis?
In general, November is the cheapest month to fly from Sydney to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,065. The month of March is another great option to travel to St. Louis, with average flight prices from Sydney averaging around $1,196.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Friday when prices can be found for as low as $1,050. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,861. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
When to book flights from Sydney to St. Louis
Cheap Sydney to St. Louis (SYD to STL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Sydney to St. Louis
How far is Sydney Kingsford Smith to Lambert-St Louis by plane?
A flight from Sydney Kingsford Smith to Lambert-St Louis will travel around 9057.2 mi. Typically, this will take 20h 45m by plane in normal conditions.
When did momondo last update prices for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport?
Prices for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport are updated daily.
How many operators does momondo search for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport?
As of June 2025, there is 1 operator available to choose from for flights from Sydney Kingsford Smith Airport to Lambert-St Louis Airport.
How old do you have to be to fly from Sydney Kingsford Smith Airport to Lambert-St Louis 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 Sydney Kingsford Smith Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Sydney to St. Louis?
Based on momondo bookings for flights between Sydney and St. Louis, the leading airline is Qantas Airways, making up 100% of the total bookings.
Best airlines flying from Sydney to St. Louis
Compare and see reviews for airlines that fly from Sydney to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $1,101 | Free Cancellation | Rating 7.5 854 reviews |
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Why should I use momondo to find a flight deal from Sydney to St. Louis?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Sydney to St. Louis. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Sydney to St. Louis with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to St. Louis from Sydney with this policy.
How can momondo help me find flights from Sydney to St. Louis?
Once all potential Sydney to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Sydney to St. Louis right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Sydney to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.