In terms of precipitation, rainfall in Sioux City ranges from 0.7 - 4.2 inches per month. June is typically the wettest month, when rainfall can reach 4.2 in. January is typically the driest time to visit Sioux City when rainfall is around 0.7 in.

If weather is an important factor for your trip to Sioux City, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

What is the cheapest time of day to fly from TYS to SUX?

When flying from Knoxville to Sioux City, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Knoxville-Sioux City flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Knoxville-Sioux City flight deals on Cheapflights vs. eDreams 90-95% of the time. Price accuracy is based on data collected from Knoxville-Sioux City flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Knoxville-Sioux City flights, Cheapflights users trust eDreams the most. eDreams 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-Sioux City flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Knoxville to Sioux City that include hotel bookings?

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

How can I find direct flights from Knoxville to Sioux City?

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

Can I find deals for business class flights from Knoxville to Sioux City?

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

$222+ Cheap Flights from Knoxville to Sioux City

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Cheap flight deals from Knoxville to Sioux City

One-way

One-way flights from Knoxville to Sioux City
Search for one-way flight options from Knoxville to Sioux City. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.

Fri 11/205:05 pm -

1 stop7h 38m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/21

$222

Find flight deals from Knoxville to Sioux City

Most accurate provider	eDreams 2 stars
Most trusted provider	eDreams 3 stars

Provider with most accurate pricing for Knoxville McGhee Tyson-Sioux City Sioux Gateway flight deals.

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Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Sioux City Sioux Gateway flights.

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KnoxvilleSioux City

TYS Knoxville McGhee Tyson - SUX Sioux City Sioux Gateway

TYSSUX

Knoxville McGhee Tyson

Fri 11/20

5:05 pm-11:43 pm

1 stop7h 38m

Sioux City Sioux Gateway

Wed 12/31

12:00 am-1:00 am

Nonstop0h 00m

$222

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Sorted by cheapest first

Compare providers for flights from Knoxville to Sioux City

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Knoxville to Sioux City in October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
eDreams	Price Accuracy2 stars	Trust 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-Sioux City flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Knoxville-Sioux City flight deals on Cheapflights vs. eDreams 90-95% of the time. Price accuracy is based on data collected from Knoxville-Sioux City flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Knoxville-Sioux City flights, Cheapflights users trust eDreams the most. eDreams 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-Sioux City 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 Sioux City

Have a flexible travel schedule? Discover the best time to fly to Sioux City from Knoxville with our price prediction graph.

TYS-SUX

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.

Related info for your journey

Can I find deals for flights from Knoxville to Sioux City that include hotel bookings?
Yes. In addition to deals on Knoxville to Sioux City flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Knoxville to Sioux City?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Knoxville to Sioux City.
Can I find deals for business class flights from Knoxville to Sioux City?
Yes. Cheapflights offers flight deals from Knoxville to Sioux City by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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$222+ Cheap flights from Knoxville to Sioux City (TYS - SUX)

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 11/20. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Knoxville to Sioux City with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Knoxville to Sioux City

One-way flights from Knoxville to Sioux CitySearch for one-way flight options from Knoxville to Sioux City. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.

Search for one-way flight options from Knoxville to Sioux City. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.

Find flight deals from Knoxville to Sioux City

Most accurate provider

Most trusted provider

Cheapflights Fare Finder

Use the filters below to find and compare flights from Knoxville to Sioux City that are best for you.

Compare providers for flights from Knoxville to Sioux City

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 Sioux City in October.

Best time to book a flight from Knoxville to Sioux City

Have a flexible travel schedule? Discover the best time to fly to Sioux City from Knoxville with our price prediction graph.

Related info for your journey

Can I find deals for flights from Knoxville to Sioux City that include hotel bookings?

How can I find direct flights from Knoxville to Sioux City?

Can I find deals for business class flights from Knoxville to Sioux City?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Knoxville to Sioux City

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Complete your trip

Complete your trip to Sioux City by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Knoxville to Sioux City by cabin class

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Knoxville and Sioux City flights

Browse other Knoxville and Sioux City flight options. Last updated on October 25, 2026.

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One-way flights from Knoxville to Sioux City
Search for one-way flight options from Knoxville to Sioux City. Find affordable one-way fares based on user searches. Data last updated October 25, 2026.