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$515+ Cheap flights from Knoxville (TYS) to Sydney (SYD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — SYD
Aug 16 — Aug 231
Sat 8/16
Sat 8/23
1 adult, Economy
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Cheap 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 August 11, 2025.

Round-trip from

$829
(United Airlines)

One-way from

$515
(United Airlines)

Popular in

October

Cheapest in

July

Average price

$1,241
From Knoxville McGhee Tyson to Sydney Kingsford Smith
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One-way flight from Knoxville McGhee Tyson to Sydney Kingsford Smith
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Highest demand for flights based on searches. 19% potential increase in price ($319 potential increase over avg. RT price).
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Cheapest flight prices on average. 11% potential price decrease ($143 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 11, 2025.

This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/95:10 pmTYS - SYD
2 stops23h 50mUnited Airlines
Tue 9/1610:20 amSYD - TYS
2 stops27h 24mUnited Airlines
Deal found 8/11$829
This United Airlines deal was found by Cheapflights users on 8/10. 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.
Sun 11/94:55 pmTYS - SYD
2 stops46h 05mUnited Airlines
Wed 11/1911:50 amSYD - TYS
1 stop24h 19mUnited Airlines
Deal found 8/10$842
This United Airlines deal was found by Cheapflights users on 8/10. 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.
Sun 11/94:55 pmTYS - SYD
2 stops46h 05mUnited Airlines
Thu 11/2011:20 amSYD - TYS
2 stops27h 35mUnited Airlines
Deal found 8/10$869
This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/144:35 pmTYS - SYD
2 stops24h 20mUnited Airlines
Wed 8/2710:20 amSYD - TYS
2 stops27h 24mUnited Airlines
Deal found 8/11$884
This United Airlines deal was found by Cheapflights users on 8/10. 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.
Thu 11/134:25 pmTYS - SYD
1 stop22h 35mUnited Airlines
Mon 11/1711:50 amSYD - TYS
1 stop22h 14mUnited Airlines
Deal found 8/10$894
This American Airlines deal was found by Cheapflights users on 8/11. 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 11/232:45 pmTYS - SYD
2 stops26h 15mAmerican Airlines
Sat 12/611:15 amSYD - TYS
2 stops22h 05mAmerican Airlines
Deal found 8/11$1,100
This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/239:10 amTYS - SYD
1 stop29h 50mUnited Airlines
Sat 12/612:10 pmSYD - TYS
2 stops26h 20mUnited Airlines
Deal found 8/11$1,115
This American Airlines deal was found by Cheapflights users on 8/11. 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.
Tue 9/96:24 pmTYS - SYD
1 stop22h 31mAmerican Airlines
Tue 9/169:10 amSYD - TYS
2 stops27h 06mAmerican Airlines
Deal found 8/11$1,149
This American Airlines deal was found by Cheapflights users on 8/11. 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.
Thu 8/145:27 pmTYS - SYD
2 stops23h 38mAmerican Airlines
Wed 8/2712:10 pmSYD - TYS
1 stop19h 39mAmerican Airlines
Deal found 8/11$1,348

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 August 11, 2025.
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

Tue 9/9

5:10 pm-7:00 am

2 stops23h 50m

Sydney Kingsford Smith

Tue 9/16

10:20 am-11:44 pm

2 stops27h 24m

$829

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Sat 2/7

5:39 pm-7:00 am

2 stops45h 21m

Sydney Kingsford Smith

Mon 2/16

11:50 am-10:58 pm

2 stops27h 08m

$842

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Fri 2/6

9:15 am-6:20 am

2 stops29h 05m

Sydney Kingsford Smith

Mon 2/16

11:50 am-11:19 pm

1 stop27h 29m

$856

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Sun 11/9

4:55 pm-7:00 am

2 stops46h 05m

Sydney Kingsford Smith

Thu 11/20

11:20 am-10:55 pm

2 stops27h 35m

$869

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Sat 2/7

12:00 pm-7:00 am

1 stop27h 00m

Sydney Kingsford Smith

Sat 3/14

11:50 am-11:19 pm

1 stop26h 29m

$879

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Thu 11/13

4:25 pm-7:00 am

1 stop22h 35m

Sydney Kingsford Smith

Mon 11/17

11:50 am-6:04 pm

1 stop22h 14m

$894

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Sun 11/23

2:45 pm-9:00 am

2 stops26h 15m

Sydney Kingsford Smith

Sat 12/6

11:15 am-5:20 pm

2 stops22h 05m

$1,100

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Sun 11/23

9:10 am-7:00 am

1 stop29h 50m

Sydney Kingsford Smith

Sat 12/6

12:10 pm-10:30 pm

2 stops26h 20m

$1,115

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Tue 9/9

6:24 pm-6:55 am

1 stop22h 31m

Sydney Kingsford Smith

Tue 9/16

9:10 am-10:16 pm

2 stops27h 06m

$1,149

KnoxvilleSydney

TYS - SYD

TYSSYD

Knoxville McGhee Tyson

Fri 2/6

4:27 pm-6:55 am

1 stop22h 28m

Sydney Kingsford Smith

Mon 2/16

2:20 pm-11:40 pm

1 stop25h 20m

$1,385

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 13 results
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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, February is the cheapest month in which you can book a flight from Knoxville to Sydney (average of $1,028). Flying from Knoxville to Sydney in December is currently the most expensive (average of $1,619). 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 August 11, 2025.
See what other customers who have flown with Korean Air, Delta, and Qantas Airways 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.
Korean Air
8.4
Very good
1,129 reviews

Food

8.1

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,129 reviews
Korean Air
8.4
Very good
1,129 reviews

Food

8.1

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very good
7,978 reviews
Korean Air
8.4
Very good
1,129 reviews

Food

8.1

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Qantas Airways
7.5
Good
893 reviews
Korean Air
8.4
Very good
1,129 reviews

Food

8.1

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Qatar Airways
7.4
Good
3,605 reviews
Korean Air
8.4
Very good
1,129 reviews

Food

8.1

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
United Airlines
7.4
Good
8,922 reviews
Korean Air
8.4
Very good
1,129 reviews

Food

8.1

Comfort

8.3

Boarding

8.5

Crew

8.7

Entertainment

8.2

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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.

  • What is the cheapest airline to fly from Knoxville to Sydney round-trip?

    Cheapflights users have booked flights from Knoxville to Sydney round-trip from $829. Users have found that United Airlines is 38% 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, February is the cheapest month in which you can book a flight from Knoxville to Sydney (average of $1,028). Flying from Knoxville to Sydney in December is currently the most expensive (average of $1,619). 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
Wollongong
Parramatta
Manly
Coogee

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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 August 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$825Average$1,252FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$901Average$1,241FlexibilityNo cancel feeOn-time71%

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