STL - SYD

$773 Find Cheap Flights from St. Louis to Sydney – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
$1,742
Typical prices: $1,775-$2,271
Air New Zealand
Thu 8/2Thu 15/2
STL - SYD • 2 stops
Cheapest one-way flight
$773
Typical prices: $1,079-$1,359
Multiple Airlines
Fri 2/11
STL - SYD • 2 stops
Direct 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 stopover airports
Los Angeles (LAX)
Cheapest • Avg $1,809 (return)
Dallas/Fort Worth (DFW)
Shortest trip • 21h 04m (one-way)
Insights
Insights
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We hope you enjoy your trip to Sydney!
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Booking Insights
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 return flight deals from St. Louis to Sydney

Mon, 8 Feb - Mon, 15 Feb
Air New Zealand Logo
15:03 - 12:50STL  Lambert-St Louis-SYD Sydney Kingsford Smith
28h 47m2 stops Houston George Bush Intcntl Auckland Intl
Air New Zealand Logo
19:25 - 21:55SYD  Sydney Kingsford Smith-STL Lambert-St Louis
43h 30m2 stops Auckland Intl San Francisco
$1,742Air New Zealand
Wed, 3 Feb - Wed, 24 Feb
Qantas Airways Logo
17:18 - 11:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
24h 47m2 stops Dallas/Fort Worth Brisbane
Qantas Airways Logo
14:05 - 18:11SYD  Sydney Kingsford Smith-STL Lambert-St Louis
21h 06m1 stop Dallas/Fort Worth
$1,764Qantas Airways
Mon, 8 Feb - Sat, 20 Feb
Air New Zealand Logo
15:03 - 10:35STL  Lambert-St Louis-SYD Sydney Kingsford Smith
26h 32m2 stops Houston George Bush Intcntl Auckland Intl
Air New Zealand Logo
11:50 - 21:55SYD  Sydney Kingsford Smith-STL Lambert-St Louis
27h 05m2 stops Auckland Intl San Francisco
$1,782Air New Zealand
Sat, 6 Feb - Thu, 18 Feb
Air New Zealand Logo
17:55 - 08:35STL  Lambert-St Louis-SYD Sydney Kingsford Smith
45h 40m2 stops Houston George Bush Intcntl Auckland Intl
Air New Zealand Logo
11:50 - 21:55SYD  Sydney Kingsford Smith-STL Lambert-St Louis
27h 05m2 stops Auckland Intl San Francisco
$1,793Air New Zealand
Sun, 18 Oct - Sun, 8 Nov
Air New Zealand Logo
07:08 - 21:50STL  Lambert-St Louis-SYD Sydney Kingsford Smith
46h 42m2 stops San Francisco Auckland Intl
Air New Zealand Logo
09:55 - 22:26SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 31m2 stops Auckland Intl Houston George Bush Intcntl
$1,808Air New Zealand
Sun, 7 Feb - Wed, 24 Feb
Air New Zealand Logo
06:15 - 10:35STL  Lambert-St Louis-SYD Sydney Kingsford Smith
35h 20m2 stops Houston George Bush Intcntl Auckland Intl
Air New Zealand Logo
09:55 - 21:55SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 00m2 stops Auckland Intl San Francisco
$1,811Air New Zealand
Sat, 6 Feb - Mon, 22 Feb
Qantas Airways Logo
17:18 - 11:05STL  Lambert-St Louis-SYD Sydney Kingsford Smith
24h 47m2 stops Dallas/Fort Worth Brisbane
Qantas Airways Logo
14:05 - 18:11SYD  Sydney Kingsford Smith-STL Lambert-St Louis
21h 06m1 stop Dallas/Fort Worth
$1,818Qantas Airways
Sat, 6 Feb - Wed, 24 Feb
Air New Zealand Logo
17:55 - 10:35STL  Lambert-St Louis-SYD Sydney Kingsford Smith
47h 40m2 stops Houston George Bush Intcntl Auckland Intl
Air New Zealand Logo
09:55 - 21:55SYD  Sydney Kingsford Smith-STL Lambert-St Louis
29h 00m2 stops Auckland Intl San Francisco
$1,822Air New Zealand
Sat, 6 Feb - Sat, 20 Feb
Qantas Airways Logo
17:18 - 06:55STL  Lambert-St Louis-SYD Sydney Kingsford Smith
20h 37m1 stop Dallas/Fort Worth
Qantas Airways Logo
06:05 - 12:32SYD  Sydney Kingsford Smith-STL Lambert-St Louis
23h 27m2 stops Brisbane Dallas/Fort Worth
$1,832Qantas Airways
Sun, 7 Feb - Sat, 20 Feb
Qantas Airways Logo
12:50 - 06:55STL  Lambert-St Louis-SYD Sydney Kingsford Smith
25h 05m1 stop Dallas/Fort Worth
Qantas Airways Logo
17:25 - 12:32SYD  Sydney Kingsford Smith-STL Lambert-St Louis
36h 07m2 stops Brisbane Dallas/Fort Worth
$1,834Qantas Airways
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 return flight from St. Louis to Sydney?

Return flights from St. Louis to Sydney start at $1,742. Prices are below average for this route right now, with typical return fares ranging from $1,775 to $2,271. The lowest price found in the past 5 days was $1,742 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 and 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 $1,609 return.
  • October ($2,224) and June ($2,222) 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

$773
Best time to beat the crowds (18% less expensive on average)
Most popular time to fly (4% more expensive on average)
Flights 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 return 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).

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

    Only Economy class is available on flights from St. Louis to Sydney.

  • 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 $1,736 return on average, while Sunday is the most expensive at $2,587, a difference of $851. 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 Darling Harbour, Circular Quay, and Central Railway Station. These are among the most viewed places in Sydney on KAYAK.

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

    A direct flight from St. Louis to Sydney takes 0h 00m, covering 23,449 km.

  • 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 $954, which is 23% below the typical average for this route.

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

    Flying via Dallas/Fort Worth (DFW) gives the shortest average 1-stop total travel time of 21h 04m, compared to 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.

  • Which car hire options are available at Sydney Kingsford Smith Airport (SYD)?

    Sydney Kingsford Smith Airport (SYD) hosts 5 major car hire companies, with daily rates starting from around $14 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?

    Return flights from St. Louis to Sydney range from $1,775 to $2,271, with an average of $1,955 over the past 12 months. Anything below $1,775 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 are flexible, aim for a Tuesday departure instead of Sunday. On this route, Tuesday flights average $1,736 – about $851 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 $1,609 return in that month – typically $615 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.
    - ibis budget Sydney Airport
    - Rydges Sydney Airport Hotel
    - Travelodge Hotel Sydney Airport

More options for your flight from St. Louis to Sydney

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

Car hire in Sydney
Hotels in Sydney
Holidays in Sydney