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Cheap flights from Sioux City to Knoxville from $374

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sioux City to Knoxville departing on 9/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Sioux City to Knoxville

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
9:03 am - 4:49 pm
SUX
-
TYS
6h 46m
1 stop
United Airlines Logo
2:00 pm - 5:54 pm
TYS
-
SUX
4h 54m
1 stop
$394United Airlines
Wed, Jan 20 - Sat, Jan 23
United Airlines Logo
9:03 am - 4:49 pm
SUX
-
TYS
6h 46m
1 stop
United Airlines Logo
2:00 pm - 5:54 pm
TYS
-
SUX
4h 54m
1 stop
$398United Airlines
Wed, Jan 20 - Sat, Jan 23
United Airlines Logo
9:03 am - 8:54 pm
SUX
-
TYS
10h 51m
2 stops
United Airlines Logo
10:16 am - 5:54 pm
TYS
-
SUX
8h 38m
2 stops
$399United Airlines
Wed, Jan 20 - Sat, Jan 23
United Airlines Logo
9:03 am - 8:54 pm
SUX
-
TYS
10h 51m
2 stops
United Airlines Logo
8:30 am - 5:54 pm
TYS
-
SUX
10h 24m
3 stops
$404United Airlines
Wed, Jan 20 - Sat, Jan 23
United Airlines Logo
8:10 am - 5:00 pm
SUX
-
TYS
7h 50m
1 stop
United Airlines Logo
1:53 pm - 5:53 pm
TYS
-
SUX
5h 00m
1 stop
$773United Airlines
Mon, Aug 10 - Wed, Aug 12
United Airlines Logo
8:10 am - 5:00 pm
SUX
-
TYS
7h 50m
1 stop
United Airlines Logo
9:45 am - 5:53 pm
TYS
-
SUX
9h 08m
2 stops
$787United Airlines
Mon, Aug 10 - Wed, Aug 12
United Airlines Logo
8:10 am - 8:34 pm
SUX
-
TYS
11h 24m
2 stops
United Airlines Logo
9:45 am - 5:53 pm
TYS
-
SUX
9h 08m
2 stops
$805United Airlines
Mon, Aug 10 - Wed, Aug 12
United Airlines Logo
8:35 am - 9:45 am
SUX
-
TYS
24h 10m
1 stop
United Airlines Logo
9:00 am - 11:43 pm
TYS
-
SUX
15h 43m
1 stop
$969United Airlines
Thu, Oct 1 - Sun, Oct 4
United Airlines Logo
8:35 am - 8:19 pm
SUX
-
TYS
10h 44m
2 stops
United Airlines Logo
3:45 pm - 11:43 pm
TYS
-
SUX
8h 58m
2 stops
$1,421United Airlines
Thu, Oct 1 - Sun, Oct 4

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United Airlines flights from Sioux City to Knoxville

Our best United Airlines deals on Sioux City to Knoxville flight tickets
United Airlines
Jan 20
SUX9:03 amSioux City Sioux Gateway
6h 46m
1 stop
TYS4:49 pmKnoxville McGhee Tyson
Jan 23
TYS2:00 pmKnoxville McGhee Tyson
4h 54m
1 stop
SUX5:54 pmSioux City Sioux Gateway
$394
United Airlines
Jan 20
SUX9:03 amSioux City Sioux Gateway
6h 46m
1 stop
TYS4:49 pmKnoxville McGhee Tyson
Jan 23
TYS2:00 pmKnoxville McGhee Tyson
4h 54m
1 stop
SUX5:54 pmSioux City Sioux Gateway
$398
United Airlines
Jan 20
SUX9:03 amSioux City Sioux Gateway
10h 51m
2 stops
TYS8:54 pmKnoxville McGhee Tyson
Jan 23
TYS10:16 amKnoxville McGhee Tyson
8h 38m
2 stops
SUX5:54 pmSioux City Sioux Gateway
$399

momondo Fare Finder

 
Customize your flight search to find flights from Sioux City to Knoxville 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, momondo users made 832,500 searches. Data last updated July 26, 2026.
Use the filters below to find and compare flights from Sioux City to Knoxville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Sioux CityKnoxville

SUX - TYS

SUXTYS

Sioux City Sioux Gateway

Wed 1/20

9:03 am-4:49 pm

1 stop6h 46m

Knoxville McGhee Tyson

Sat 1/23

2:00 pm-5:54 pm

1 stop4h 54m

$394

Sioux CityKnoxville

SUX - TYS

SUXTYS

Sioux City Sioux Gateway

Wed 1/20

9:03 am-4:49 pm

1 stop6h 46m

Knoxville McGhee Tyson

Sat 1/23

2:00 pm-5:54 pm

1 stop4h 54m

$398

Sioux CityKnoxville

SUX - TYS

SUXTYS

Sioux City Sioux Gateway

Wed 1/20

9:03 am-8:54 pm

2 stops10h 51m

Knoxville McGhee Tyson

Sat 1/23

10:16 am-5:54 pm

2 stops8h 38m

$399

Sioux CityKnoxville

SUX - TYS

SUXTYS

Sioux City Sioux Gateway

Wed 1/20

9:03 am-8:54 pm

2 stops10h 51m

Knoxville McGhee Tyson

Sat 1/23

8:30 am-5:54 pm

3 stops10h 24m

$404

Sioux CityKnoxville

SUX - TYS

SUXTYS

Sioux City Sioux Gateway

Mon 8/10

8:10 am-5:00 pm

1 stop7h 50m

Knoxville McGhee Tyson

Wed 8/12

1:53 pm-5:53 pm

1 stop5h 00m

$773

Sioux CityKnoxville

SUX - TYS

SUXTYS

Sioux City Sioux Gateway

Mon 8/10

8:10 am-5:00 pm

1 stop7h 50m

Knoxville McGhee Tyson

Wed 8/12

9:45 am-5:53 pm

2 stops9h 08m

$787

Sioux CityKnoxville

SUX - TYS

SUXTYS

Sioux City Sioux Gateway

Mon 8/10

8:10 am-8:34 pm

2 stops11h 24m

Knoxville McGhee Tyson

Wed 8/12

9:45 am-5:53 pm

2 stops9h 08m

$805

Sioux CityKnoxville

SUX - TYS

SUXTYS

Sioux City Sioux Gateway

Thu 10/1

8:35 am-9:45 am

1 stop24h 10m

Knoxville McGhee Tyson

Sun 10/4

9:00 am-11:43 pm

1 stop15h 43m

$969

Sioux CityKnoxville

SUX - TYS

SUXTYS

Sioux City Sioux Gateway

Thu 10/1

8:35 am-8:19 pm

2 stops10h 44m

Knoxville McGhee Tyson

Sun 10/4

3:45 pm-11:43 pm

2 stops8h 58m

$1,421
Cheapest one-way

Sioux CityKnoxville

SUX - TYS

SUXTYS

Sioux City Sioux Gateway

Fri 9/25

6:58 pm-3:54 pm

1 stop19h 56m

$374

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Knoxville from

How to get the cheapest flight ticket from Sioux City to Knoxville

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Sioux City Sioux Gateway to Knoxville McGhee Tyson?

United Airlines is the most popular carrier operating from Sioux City Sioux Gateway to Knoxville McGhee Tyson

What airlines fly to Knoxville?

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to Knoxville from Sioux City according to our data. American Airlines is the first choice among our users, with 44% of people opting to fly with this airline when traveling to Knoxville. Keep in mind that there are 4 different airlines that fly to Knoxville on a routine basis, so you have a few additional options to choose from.

When to book flights from Sioux City to Knoxville

Are you open to changing your travel dates? Check out the ideal times to fly from Sioux City to Knoxville according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Sioux City to Knoxville (SUX to TYS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sioux City to Knoxville

Fastest flight time

7h 50m

Direct flights

None
The fastest flight from Sioux City to Knoxville takes 7h 50m
There are no direct flights from Sioux City to Knoxville. There are no popular flight routes from Sioux City to Knoxville.
Search flight deals

Frequently asked questions about flying from Sioux City to Knoxville

  • How far is Sioux City Sioux Gateway to Knoxville McGhee Tyson by plane?

    The straight-line distance from Sioux City Sioux Gateway to Knoxville McGhee Tyson is 804.5 mi. 7h 50m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Sioux City Sioux Gateway Airport to Knoxville McGhee Tyson Airport?

    Prices for flights from Sioux City Sioux Gateway Airport to Knoxville McGhee Tyson Airport were last updated today.

  • How old do you have to be to fly from Sioux City Sioux Gateway Airport to Knoxville McGhee Tyson Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Sioux City Sioux Gateway Airport to Knoxville McGhee Tyson Airport.

  • What documentation or ID do you need to fly to Knoxville McGhee Tyson Airport?

    The travel and health documents required for your trip to Knoxville McGhee Tyson Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Knoxville McGhee Tyson Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Pigeon Forge
Gatlinburg
Cherokee
Bryson City
Morristown
Corbin
Alcoa
Maryville
Crossville
Murphy
Oak Ridge
Kodak
Newport
Lenoir City
Dandridge
Clinton
Jefferson City
Rockford

Why use momondo?

Why should I use momondo to find a flight deal from Sioux City to Knoxville?

Finding the right flight to Knoxville from Sioux City is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Knoxville quick and easy, saving you time and money.

Can I find flights from Sioux City to Knoxville with flexible booking policies on momondo?

momondo does allow users to show only those flights to Knoxville from Sioux City which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Sioux City to Knoxville?

momondo provides multiple filters to help you find the best flight to Knoxville from Sioux City. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Sioux City to Knoxville right now. Can momondo alert me if prices change?

Price alerts on flights to Knoxville from Sioux City are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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