STL - SYD

$613 Find Cheap Flights from St. Louis to Sydney - Compare and Save

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Everything you should know

Cheapest round-trip
$1,268
Typical prices: $1,281-$1,639
Air New Zealand
Fri 2/2Fri 2/23
STL - SYD • 2 stops
Cheapest one-way
$613
Typical prices: $779-$980
Multiple Airlines
Fri 10/26
STL - SYD • 2 stops
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Sydney. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
July
Cheapest • 18% price drop
November
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Los Angeles (LAX)
Cheapest • Avg $1,305 (round-trip)
Dallas/Fort Worth (DFW)
Shortest trip • 21h 04m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from St. Louis to Sydney (STL-SYD)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Sydney

Tue, Feb 2 - Tue, Feb 23
Air New Zealand Logo
8:30 am - 9:50 pmSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
44h 20m2 stops San Francisco Auckland Intl
Air New Zealand Logo
11:50 am - 9:55 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
27h 05m2 stops Auckland Intl San Francisco
$1,268Air New Zealand
Sun, Nov 15 - Thu, Nov 19
Air New Zealand Logo
6:15 am - 8:35 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
33h 20m2 stops Houston George Bush Intcntl Auckland Intl
Air New Zealand Logo
9:55 am - 10:25 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 30m2 stops Auckland Intl Houston George Bush Intcntl
$1,285Air New Zealand
Thu, Feb 4 - Tue, Feb 9
Air New Zealand Logo
6:15 am - 10:35 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
35h 20m2 stops Houston George Bush Intcntl Auckland Intl
Air New Zealand Logo
11:50 am - 10:13 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
27h 23m2 stops Auckland Intl Houston George Bush Intcntl
$1,285Air New Zealand
Tue, Feb 2 - Tue, Feb 23
United Airlines Logo
9:13 am - 9:20 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
31h 07m2 stops Denver Intl San Francisco
United Airlines Logo
1:20 pm - 9:55 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
25h 35m1 stop San Francisco
$1,316United Airlines
Tue, Feb 2 - Tue, Feb 23
United Airlines Logo
3:03 pm - 7:00 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
22h 57m1 stop Houston George Bush Intcntl
United Airlines Logo
11:50 am - 9:55 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
27h 05m1 stop San Francisco
$1,316United Airlines
Sat, Oct 31 - Sat, Nov 7
Qantas Airways Logo
3:20 pm - 6:55 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
23h 35m1 stop Dallas/Fort Worth
Qantas Airways Logo
11:05 am - 8:42 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
26h 37m2 stops Brisbane Los Angeles
$1,318Qantas Airways
Fri, Oct 30 - Fri, Nov 6
Qantas Airways Logo
3:20 pm - 6:55 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
23h 35m1 stop Dallas/Fort Worth
Qantas Airways Logo
11:05 am - 8:42 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
26h 37m2 stops Brisbane Los Angeles
$1,319Qantas Airways
Wed, Oct 14 - Tue, Oct 27
United Airlines Logo
4:39 pm - 8:00 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
23h 21m2 stops Denver Intl Los Angeles
United Airlines Logo
11:50 am - 6:05 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
22h 15m1 stop San Francisco
$1,329United Airlines
Tue, Nov 3 - Tue, Nov 10
American Airlines Logo
8:10 am - 6:25 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
29h 15m1 stop Los Angeles
American Airlines Logo
11:10 am - 8:42 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
26h 32m1 stop Los Angeles
$1,345American Airlines
Tue, Nov 3 - Tue, Nov 10
American Airlines Logo
11:35 am - 6:25 amSTL  Lambert-St Louis-SYD Sydney Kingsford Smith
25h 50m2 stops Chicago O'Hare Intl Los Angeles
American Airlines Logo
2:05 pm - 8:19 pmSYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 14m1 stop Dallas/Fort Worth
$1,350American Airlines
Booking Insights

Price, demand and travel trends for St. Louis to Sydney flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from St. Louis to Sydney with more confidence.

How much is a round-trip flight from St. Louis to Sydney?

Round-trip flights from St. Louis to Sydney start at $1,268. Prices are below average for this route right now, with typical round-trip fares ranging from $1,281 to $1,639. The lowest price found in the past 5 days was $1,268 on Air New Zealand.

What's the cheapest day of the week to fly from St. Louis to Sydney?

Tuesday is the cheapest day of the week to fly from St. Louis to Sydney, it is 12% cheaper than the average day. Sunday is the most expensive day with flight prices 32% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from St. Louis to Sydney?

•July is the cheapest month to fly from St. Louis to Sydney at $1,161 round-trip.
•October ($1,605) and June ($1,604) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 38% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Key details for St. Louis to Sydney flights

Low season

July

Cheapest flight

$613
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from St. Louis to Sydney

When to book flights from St. Louis to Sydney

Are your dates flexible? Find out the best times to travel from St. Louis to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your St. Louis to Sydney flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from St. Louis to Sydney?

    Flights from St. Louis to Sydney usually depart from Lambert-St Louis (STL) and arrive at Sydney Kingsford Smith (SYD).

  • What cabin classes can I book on flights from St. Louis to Sydney?

    Four cabin classes are available on flights from St. Louis to Sydney:

    • Economy Class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

  • Which airports do connecting flights from St. Louis to Sydney pass through?

    One-stop flights from St. Louis to Sydney most commonly connect through:

    • Dallas/Fort Worth (DFW) - 71% of one-stop connections
    • San Francisco (SFO) - 23% of one-stop connections
    • Houston George Bush Intcntl (IAH) - 3% of one-stop connections
    • Los Angeles (LAX) - 2% of one-stop connections

    Dallas/Fort Worth (DFW) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from St. Louis to Sydney?

    Yes. Being flexible with your travel dates can save you up to 33% on the St. Louis to Sydney route. Tuesday is the cheapest departure day at $1,253 round-trip on average, while Sunday is the most expensive at $1,867, a difference of $614. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Sydney?

    Some of the most popular sights in Sydney are Sydney Opera House, Museum of Contemporary Art and Chinatown Night Market. These are among the most viewed places in Sydney on KAYAK.

  • How long is a flight from St. Louis to Sydney?

    A nonstop flight from St. Louis to Sydney takes 0h 00m, covering 9,054 miles.

  • Do I need a passport to fly from St. Louis to Sydney?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How are flight prices from St. Louis to Sydney looking right now?

    One-way fares from St. Louis to Sydney are currently lower than usual. Average one-way flight prices are about $837, which is 6% below the typical average for this route.

  • How much time can I save by choosing a different layover airport from St. Louis to Sydney?

    Flying via Dallas/Fort Worth (DFW) gives the shortest average 1-stop total travel time at 21h 04m, compared with 21h 19m via Houston George Bush Intcntl (IAH) and 22h 12m via San Francisco (SFO).

  • What is the time difference between St. Louis and Sydney?

    Sydney is 15 hours ahead of St. Louis (Eastern Australia Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Sydney Kingsford Smith Airport (SYD)?

    Sydney Kingsford Smith Airport (SYD) hosts 5 major car rental companies, with daily rates starting from around $10 for economy cars. Top options include:
    • Bargain Car Rentals
    • East Coast Car Rentals
    • EverythingFleet
    • YESDRIVE CAR RENTAL
    • No Birds

  • How much should I expect to pay for a St. Louis to Sydney flight?

    Round-trip flights from St. Louis to Sydney range from $1,281 to $1,639, with an average of $1,411 over the past 12 months. Anything below $1,281 counts as a good deal.

Your guide to booking St. Louis to Sydney flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Tuesday departure instead of Sunday. On this route, Tuesday flights average $1,253 - about $614 less than Sunday (33% savings) based on the last 12 months.
  • If you can choose when to travel, plan your St. Louis to Sydney trip for July. Fares historically average $1,161 round-trip in that month - typically $444 less than the most expensive month, which is October (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Sydney Kingsford Smith Airport.
    - Travelodge Hotel Sydney Airport
    - Rydges Sydney Airport Hotel
    - ibis budget Sydney Airport

More options for your flight from St. Louis to Sydney

Complete your trip to Sydney with a hotel stay or car rental

Car rentals in Sydney
Hotels in Sydney
Vacations in Sydney