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$1,139+ Cheap flights from Knoxville (TYS) to Sydney (SYD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SYD
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
1 adult, Economy
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Cheap flight deals from Knoxville to Sydney

Cheapest flights from Knoxville to Sydney
Explore the most affordable flight options available from Knoxville to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 11, 2026.

This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/154:30 pm
TYS
-
SYD
2 stops24h 25m
United Airlines
Tue 4/2810:20 am
SYD
-
TYS
2 stops26h 09m
United Airlines
Deal found 2/9$1,139
This United Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/274:18 pm
TYS
-
SYD
2 stops24h 47m
United Airlines
Mon 4/139:30 am
SYD
-
TYS
2 stops26h 59m
United Airlines
Deal found 2/10$1,188
This American Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/154:29 pm
TYS
-
SYD
2 stops24h 31m
American Airlines
Sat 2/2811:20 am
SYD
-
TYS
2 stops22h 11m
American Airlines
Deal found 2/11$1,257
This American Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/164:29 pm
TYS
-
SYD
1 stop22h 26m
American Airlines
Mon 3/22:05 pm
SYD
-
TYS
1 stop26h 23m
American Airlines
Deal found 2/9$1,332
This American Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/65:40 am
TYS
-
SYD
1 stop35h 15m
American Airlines
Sat 4/1112:00 pm
SYD
-
TYS
2 stops25h 55m
American Airlines
Deal found 2/9$1,344
This United Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/84:55 pm
TYS
-
SYD
1 stop23h 05m
United Airlines
Sun 3/1511:50 am
SYD
-
TYS
1 stop21h 20m
United Airlines
Deal found 2/8$1,382
This United Airlines deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/284:55 pm
TYS
-
SYD
2 stops24h 05m
United Airlines
Sat 4/411:20 am
SYD
-
TYS
2 stops42h 46m
United Airlines
Deal found 2/10$1,397
This United Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/251:53 pm
TYS
-
SYD
2 stops27h 12m
United Airlines
Wed 4/111:20 am
SYD
-
TYS
2 stops50h 09m
United Airlines
Deal found 2/8$1,450

Find flight deals from Knoxville to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,139
(United Airlines)

Popular in

April

Cheapest in

July

Average price

$1,296
Provider with most accurate pricing for Knoxville McGhee Tyson-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Sydney Kingsford Smith flights.
Search Deals
From Knoxville McGhee Tyson to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($416 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($85 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 11, 2026.
Use the filters below to find and compare flights from Knoxville to Sydney that are best for you.

Fly from

Knoxville

Fly to

Sydney

Route

Depart

Return

Price

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Wed 4/15

4:30 pm-6:55 am

2 stops24h 25m

Sydney Kingsford Smith

Tue 4/28

10:20 am-10:29 pm

2 stops26h 09m

$1,139

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Fri 3/27

4:18 pm-8:05 am

2 stops24h 47m

Sydney Kingsford Smith

Mon 4/13

9:30 am-10:29 pm

2 stops26h 59m

$1,188

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Wed 4/15

10:56 am-6:55 am

1 stop29h 59m

Sydney Kingsford Smith

Tue 4/28

12:00 pm-11:56 pm

1 stop25h 56m

$1,332

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Sun 3/1

4:29 pm-6:55 am

1 stop22h 26m

Sydney Kingsford Smith

Wed 3/4

2:05 pm-5:31 pm

1 stop19h 26m

$1,332

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Sun 3/8

4:15 pm-9:00 am

2 stops25h 45m

Sydney Kingsford Smith

Sun 3/15

1:05 pm-9:38 pm

2 stops23h 33m

$1,335

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Sun 5/17

4:09 pm-7:30 am

2 stops25h 21m

Sydney Kingsford Smith

Sun 5/24

9:10 am-7:31 pm

2 stops24h 21m

$1,335

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Mon 4/6

2:49 pm-7:05 am

2 stops26h 16m

Sydney Kingsford Smith

Sat 4/11

12:00 pm-11:55 pm

2 stops25h 55m

$1,335

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/9

Compare providers for flights from Knoxville to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Sydney in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Knoxville-Sydney flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Knoxville-Sydney flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Knoxville-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Knoxville-Sydney flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Knoxville-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Knoxville to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Knoxville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Knoxville to Sydney

What is the cheapest month to book a flight from Knoxville to Sydney?

Currently, July is the cheapest month in which you can book a flight from Knoxville to Sydney (average of $546). Flying from Knoxville to Sydney in April is currently the most expensive (average of $2,144). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated February 11, 2026.
See what other customers who have flown with United Airlines and American Airlines from Knoxville to Sydney have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,274 reviews

Crew

8.1

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,274 reviews
United Airlines
7.4
Good
9,274 reviews

Crew

8.1

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,266 reviews
United Airlines
7.4
Good
9,274 reviews

Crew

8.1

Overall

7.4

Entertainment

7.1

Comfort

7.3

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Knoxville to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Knoxville to Sydney?

    A quick flight from Knoxville to Sydney can take about 24h 25m. United Airlines provides one of the quickest options available for as low as $1,139. There are 9343 mi between Knoxville and Sydney. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Knoxville to Sydney round-trip?

    Cheapflights users have booked flights from Knoxville to Sydney round-trip from $821. Another airline that can offer you cheap pricing is American Airlines. Users have found that United Airlines is 42% cheaper than the other options available to this destination.

  • Can I find deals for flights from Knoxville to Sydney that include hotel bookings?

    Yes. In addition to deals on Knoxville to Sydney flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Knoxville to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Knoxville to Sydney.

  • Can I find deals for business class flights from Knoxville to Sydney?

    Yes. Cheapflights offers flight deals from Knoxville to Sydney by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Knoxville to Sydney?

    Currently, July is the cheapest month in which you can book a flight from Knoxville to Sydney (average of $546). Flying from Knoxville to Sydney in April is currently the most expensive (average of $2,144). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Manly

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Alternative routes for Knoxville to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Knoxville to Sydney

Discover the top 2 airlines that operate flights from Knoxville to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$821Average$1,262FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$901Average$1,297FlexibilityNo cancel feeOn-time71%

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