$693 Find Cheap Flights from St. Louis to Australia - Compare and Save

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Cheap Flights from St. Louis to Australia

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Sydney
Sydney1 stop$1,139
Brisbane
Brisbane2 stops$1,108
Perth
Perth2 stops$1,527
Cairns
Cairns2 stops$1,361
Hobart
Hobart2 stops$1,712
Canberra
Canberra3 stops$1,878
Sydney
Sydney1 stop$1,139
Brisbane
Brisbane2 stops$1,108
Perth
Perth2 stops$1,527
Cairns
Cairns2 stops$1,361
Hobart
Hobart2 stops$1,712
Canberra
Canberra3 stops$1,878
Booking Insights

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

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

Are flights from St. Louis to Australia cheaper or more expensive than last year?

Fares from St. Louis to Australia are running about 7% lower than they were around this time last year, averaging $1,396 round-trip.

What are the cheapest fares from St. Louis to Australia right now?

Here are the cheapest round-trip fares from St. Louis to Australia on KAYAK in the last week:

• Melbourne (MEL) from $1,083
• Brisbane (BNE) from $1,108
• Sydney Kingsford Smith (SYD) from $1,139
• Cairns (CNS) from $1,361
• Perth (PER) from $1,527

What’s the cheapest month to fly from St. Louis to Australia?

May is the cheapest time of year to fly, with average fares of $1,149. Prices are highest in December, when average flight costs increase to around $1,809.

Which airport in Australia is the cheapest to fly to from St. Louis?

Based on KAYAK data from the past 12 months, the cheapest airports to fly into Australia are:

• Brisbane (BNE) from $1,177
• Sydney Kingsford Smith (SYD) from $1,434
• Hobart (HBA) from $1,474

What’s the cheapest day to fly from St. Louis to Australia?

Friday tends to be the cheapest day to fly from St. Louis to Australia, while Saturday is the most expensive. Fares run about 17% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from St. Louis to Australia?

Data from the past 12 months shows it's cheapest to fly to Australia during the afternoon with average prices of $1,389. The evening is the most expensive time to fly, with average prices of $1,539.

Key details for St. Louis to Australia flights

Low season

March

Cheapest flight

$693
Beat the crowds with an average 31% drop in travelers.
The most popular month to fly with an average 125% increase in travelers.
One-way flight from St. Louis to Brisbane

Your St. Louis to Australia flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from St. Louis to Australia?

    Yes. Fares from St. Louis to Australia are low right now. As a rule of thumb, a round-trip under $1,177 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from St. Louis to Australia?

    Over the past 12 months, round-trip fares from St. Louis to Australia have ranged from $1,177 to $1,780.

  • What are the main airports serving Australia?

    Australia has 10 airports. The three busiest are Sydney Kingsford Smith (SYD) (37% of arrivals), Melbourne (MEL) (25%) and Brisbane (BNE) (11%).

  • What airlines fly nonstop from St. Louis to Australia?

    Based on the flight schedule for the next 3 months, no airline regularly operates nonstop flights from St. Louis to Australia. One-stop options include United Airlines and American Airlines.

  • Which cabin classes are available on flights from St. Louis to Australia?

    On flights from St. Louis to Australia you can book Economy Class, Premium Economy Class, Business Class or First Class.

  • What are some popular landmarks in Australia?

    KAYAK travelers' favorite landmarks in Australia include:

    • Sydney Opera House
    • Marvel Stadium
    • Melbourne Cricket Ground
    • Crown Casino

Your guide to booking St. Louis to Australia flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your travel dates are flexible, book your trip for May when flights are typically cheapest and avoid December when prices are at their highest.
  • Flying on Friday is usually the cheapest. Flights on Saturday cost about 17% more on average, so being flexible with your travel dates could help you save.
  • If you're looking to save, Brisbane (BNE) is the cheapest airport to fly into from St. Louis. If you have onward travel, don't forget to factor in the cost of your journey by train, bus or domestic flight.
  • Start your trip in Sydney, which is the most popular destination in Australia. From there, it's easy to continue on to other popular destinations such as Melbourne, Brisbane and Perth.

Reviews of the top 4 airlines serving from St. Louis to Australia

 
Need help choosing which airline to fly with from St. Louis to Australia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
Qantas AirwaysOverall score based on 1104 reviews
7.7Boarding
7.2Entertainment
8.1Crew
7.0Food
7.4Comfort
Airline reviews

Despite having numerous passengers held up by American Airlines delays. Qantas (an AA partner) closed boarding with 0 flexibility

2.0 MediocreAnonymous, Aug 2026
Read more Qantas Airways reviews

Despite having numerous passengers held up by American Airlines delays. Qantas (an AA partner) closed boarding with 0 flexibility

Boarding , crew and meals were all amazing. Couldn't wish for a better LOOONG flight from Dallas to Sydney .

Boarding was effortless, the food was outstanding, the seats in Premium Economy were extremely comfortable, and the staff and crew were excellent.

PREMIUM ECONOMY - excellent !Brilliant new plane. Excellent tv catalogue. Good food. Good communication and service from all friend Australian crew. Good communication from captain. Best travel experience in years.

I couldn't hear all of the announcements. It was nice when they put them on the screen.

I liked boarding the plane. The staff were rude, the food was appalling and the chairs the most uncomfortable I have ever experienced

One of the best Qantas business flights I've had. Quality product

Loved the staff. The economy seats could have been bigger.

The food was terrible. And the flight attendants were very rude. One flight attendant wouldn’t help a passenger lift their carry-on. Another flight attendant wouldn’t give a man an extra blanket. And they walked by not even looking at the passengers to see if they needed a glass of water.

I have flown Qantas multiple times in the past it seemed this flight the plane had less seat room or the seats were way less comfortable than before. Everything else was about the same. Thanks

Great Brasilia aircraft - not a Boeing 757 like the next part of the flight. Flight from MCI to IAD was great, on-time, comfortable, did I mention that? The flight from IAD to EDI was painful. One of the reasons I won't fly United again? Boeing 757, with a seat pitch and material that was horrendous. Worst aircraft ever, made worse by United sardine-can tight seating. Oh, and the connection window, 45 minutes, really? At IAD, in different concourses? What idiot came up with that flight scenario? Happily, (for me and my travel insurance people) the flight was late (reminiscent of American Airlines). The crew was professional and courteous.

On boarding crew at the airport called in the boarding numbers too early meaning before the previous line was completed resulting in later numbers getting to board ahead. Also she asked those who boarded from number 3 to have the tags in their carry-on bags and leave it in the jet bridge. Most of the overhead bins were empty though. This is more work for the ground staff in addition to more inconvenience for passengers waiting to get their carry-ons from the jet bridge.

The flight to America was freezing. The overnight flight back to the UK was boiling hot and the cabin stank of toilet or occasionally perfume, even though I was several rows back from either bathroom. Food was tiny portions. Two small pieces of tough and dry beef in random gravy with pretend mashed potato raking up most of it. Very little veg. Salad was ok. Wooden cutlery broke within minutes of using. Lots of old films for entertainment. Some new ones. Generally a bit rubbish.

I almost missed my connection in Chicago due to having to wait on a gate to be open I am assuming. Having to run from E terminal to C terminal and I barely made it there before they closed the door. This may not be the actual airline's fault it's crazy how there is so little time between flight especially when they are placed so far apart in the airport.

Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

Onboarding - it would be great to see on the screen what group they were boarding. It was very confusing on who was boarding (even though they called it out) they were not clear and the space to board was strange.

Older plane. Food was really bad, almost not worth the effort. Huge difference with European based airlines.

Older interior meant less luggage storage space. Service was good. I was in business class. I receive better service from other carriers

It was pretty good. It was my first time using the airline I believe but it was a relatively pleasant experience.

Boarded on time and arrived early. Overall quick flight. Snack and beverage offered.

Good but I don’t received my bags yet is been 5days still no update

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Friendlier staff who are nice to the elderly who need assistance

Service was great. Flight was delayed an hour which made our connection very tight and stressful. But we fortunately made it.

There was a mistake with the first name we only discovered at security. Air canada was unable to correct it to match then passport since it was booked through an agency. The agency could not correct it either since they need at least two hours to do that. We could not fly and lost a bunch of money. Learned my lesson about kayak.

Fresh fuit or veg snacks would be so great, but there are two good restaurants in Denver airport. Try Etais UDIS or Freshens DIA for nutritious delicious pita sandwiches/ donairs and crepes in Freshens.

I appreciate the fact that the flight took off and landed on time What I didn’t like they never offer a snack eg nuts/cookies/chips

Staff in first class seemed to struggle to provide service to both sections. I didn’t get breakfast though I requested it. I only got coffee after asking the opposite side flight attendant and then could never see them to request a bottle of water.

My luggage was not sent with us. Not sure if this is Envoy Air responsibility but that was a very BAD experience

American delayed the flight for a crew rest period. The delay occurred late in the evening - the earliest i can find is 10:20 pm. With a 6 am flight anyone on the flight would have already have been asleep (unless you are insane, a vampire or on drugs) and at least for me i was already on the way to the airport at 445 am the next morning when i discovered they delayed the flight until 9 am. Given the incoming flight was in the air at 6 pm the evening before this should have been figured out a lot more timely that was there only crew to use. Just frustrating given there is no consideration for customer experience anymore in flying.

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

No enough space plus only allowing one laggage instead of two like other airlines.

Qatar airways ,boarding arrangements at Hamid international airport could been better

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

Miami lounges were overcrowded and we were unable to get in. We only had a short time. But the banks are too tight in all American hubs

Overall boarding and debarking is a joke. I dont even bring luggage anymore on trips because you can never allow them to be place then in the overhead bin or you have to pay or you check them which is even worse having to wait for your luggage on the tarmac.

More options for your flight from St. Louis to Australia

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