$649 Cheap Flights from Tri-Cities (TRI) to Sydney (SYD)

View $649 flight on Fri, Sep 4, 2026Opens in a new window

Popular airlines from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney Airport (SYD)

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Cheap Flights from Tri-Cities to Sydney (TRI-SYD)

Prices were available within the past 7 days and start at $649 for one-way flights and $1,407 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Oct 7 - Wed, Oct 14
TRI
Tri-Cities
SYD
Sydney
$1,407 Roundtrip, found 3 days ago
$1,407
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Oct 7 from Tri-Cities to Sydney, returning Wed, Oct 14, priced at $1,407 found 3 days ago
American Airlines
Wed, Oct 7 - Wed, Oct 14
TRI
Tri-Cities
SYD
Sydney
$1,413 Roundtrip, found 3 days ago
$1,413
Roundtrip
found 3 days ago
Select American Airlines flight, departing Wed, Oct 7 from Tri-Cities to Sydney, returning Wed, Oct 14, priced at $1,413 found 3 days ago
American Airlines
Sat, Jun 13 - Sat, Jun 20
TRI
Tri-Cities
SYD
Sydney
$1,416 Roundtrip, found 5 days ago
$1,416
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Jun 13 from Tri-Cities to Sydney, returning Sat, Jun 20, priced at $1,416 found 5 days ago
American Airlines
Sat, Jun 13 - Sat, Jun 20
TRI
Tri-Cities
SYD
Sydney
$1,419 Roundtrip, found 5 days ago
$1,419
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Jun 13 from Tri-Cities to Sydney, returning Sat, Jun 20, priced at $1,419 found 5 days ago
American Airlines
Sat, Jun 13 - Sat, Jun 20
TRI
Tri-Cities
SYD
Sydney
$1,421 Roundtrip, found 5 days ago
$1,421
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Jun 13 from Tri-Cities to Sydney, returning Sat, Jun 20, priced at $1,421 found 5 days ago
American Airlines
Sat, Jun 13 - Sat, Jun 20
TRI
Tri-Cities
SYD
Sydney
$1,426 Roundtrip, found 5 days ago
$1,426
Roundtrip
found 5 days ago
Select American Airlines flight, departing Sat, Jun 13 from Tri-Cities to Sydney, returning Sat, Jun 20, priced at $1,426 found 5 days ago
United
Thu, Oct 1 - Thu, Oct 29
TRI
Tri-Cities
SYD
Sydney
$1,512 Roundtrip, found 5 days ago
$1,512
Roundtrip
found 5 days ago
Select United flight, departing Thu, Oct 1 from Tri-Cities to Sydney, returning Thu, Oct 29, priced at $1,512 found 5 days ago
Delta
Fri, Sep 4 - Sun, Sep 20
TRI
Tri-Cities
SYD
Sydney
$1,513 Roundtrip, found 4 days ago
$1,513
Roundtrip
found 4 days ago
Select Delta flight, departing Fri, Sep 4 from Tri-Cities to Sydney, returning Sun, Sep 20, priced at $1,513 found 4 days ago
Korean Air
Sun, Nov 1 - Sat, Nov 7
TRI
Tri-Cities
SYD
Sydney
$2,559 Roundtrip, found 8 hours ago
$2,559
Roundtrip
found 8 hours ago
Select Korean Air flight, departing Sun, Nov 1 from Tri-Cities to Sydney, returning Sat, Nov 7, priced at $2,559 found 8 hours ago
Qatar Airways
Mon, Sep 28 - Thu, Oct 15
TRI
Tri-Cities
SYD
Sydney
$3,531 Roundtrip, found 5 days ago
$3,531
Roundtrip
found 5 days ago
Select Qatar Airways flight, departing Mon, Sep 28 from Tri-Cities to Sydney, returning Thu, Oct 15, priced at $3,531 found 5 days ago

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Frequently asked questions

How much does a flight from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.) cost?
You can find cheap one-way flights from $649 and cheap return flights from $1,407 Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.) with Expedia. Return flights typically cost between $1297 and $4757. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The cheapest month to fly from TRI to SYD is October when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Enter TRI to SYD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Delta is one of the cheapest airlines offering connecting flights from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.), with round-trip tickets starting from around $1,297. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
To find a cheap flight from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The earliest flight from Tri-Cities Regional (TRI) to Kingsford Smith International (SYD) typically departs at 6:05 AM, operated by Delta. This seasonal service is available in January, allowing you to maximize your time in Sydney. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
You'll usually find the most flights from Tri-Cities Regional (TRI) to Kingsford Smith Intl. (SYD) on a Tuesday, with around 10 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines and Delta.
What are the most popular departure times for flights from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The most popular departure times for flights from Tri-Cities, TN (TRI) to Sydney, NSW (SYD) are in the early morning, from 6am to 9am. About 28% of passengers prefer this time window. Many major carriers, including American Airlines, Delta Airlines and Qantas, offer flights during this window. This timing is popular because it allows you to arrive in Sydney with a full day to explore.
How long does it take to fly from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Flights from TRI to SYD with one stop typically take around 22 hours 50 minutes, covering approximately 9,447 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Select the "Business class" and "First class" filters when looking for TRI to SYD flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight with Expedia?
It's easy to earn miles on a Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Sydney from Tri-Cities Regional (TRI)?
From Tri-Cities Regional (TRI), you can fly into Kingsford Smith Intl. (SYD) to reach Sydney. Some flights may connect through major hubs like Hartsfield-Jackson Atlanta Intl. (ATL), Dallas-Fort Worth Intl. (DFW), Charlotte-Douglas Intl. (CLT) before reaching Sydney. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.) at the last minute?
Typically, booking a last minute flight from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight and hotel package?
Securing a Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.) Sydney Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
If you booked your Tri-Cities, TN (TRI-Tri-Cities Regional) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Tri-Cities Regional
Destination airport
Kingsford Smith Intl.
Airlines serving
Korean Air
Roundtrip price
$1,407
Distance
9446 mi

Book with confidence

Tri-Cities to Sydney Flights

The cheapest times to fly from Tri-Cities to Sydney

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Tri-Cities to Sydney are during the month of October. You can find some of the cheapest flights from Tri-Cities to Sydney with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Tri-Cities to Sydney

Sunday is one of the best days to book for cheap flights from Tri-Cities to Sydney: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Tri-Cities to Sydney

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Tri-Cities to Sydney in 2026. You can also book with separate airlines for your outbound and return journeys, from $649 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Tri-Cities to Sydney flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Tri-Cities to Sydney airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Tri-Cities to Sydney Flights

*Flight schedules are subject to change.

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*Available to One Key members.