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Sioux City

$163+ Cheap flights from Denver to Sioux City (DEN - SUX)

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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SUX
Sep 9 — Sep 161
Wed 9/9
Wed 9/16
1 adult, Economy
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Cheap flight deals from Denver to Sioux City

Cheapest flights from Denver to Sioux City
Explore the most affordable flight options available from Denver to Sioux City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.

This United Airlines deal was found by Cheapflights users on 8/9. 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.
Mon 9/78:15 am -
Nonstop1h 40m
Sun 9/136:35 pm -
Nonstop1h 54m
Deal found 8/9$234
This United Airlines deal was found by Cheapflights users on 8/7. 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 12/53:35 pm -
Nonstop1h 36m
Mon 12/76:46 pm -
Nonstop1h 51m
Deal found 8/7$274
This United Airlines deal was found by Cheapflights users on 8/6. 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 9/48:15 am -
Nonstop1h 40m
Mon 9/711:30 am -
Nonstop1h 54m
Deal found 8/6$282
This United Airlines deal was found by Cheapflights users on 8/6. 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 10/89:05 pm -
Nonstop1h 38m
Tue 10/136:58 pm -
Nonstop1h 54m
Deal found 8/6$322
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Tue 8/258:15 am -
Nonstop1h 40m
Sat 8/2911:30 am -
Nonstop1h 54m
Deal found 8/9$330
This United Airlines deal was found by Cheapflights users on 8/6. 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 10/119:05 pm -
Nonstop1h 38m
Wed 10/146:58 pm -
Nonstop1h 54m
Deal found 8/6$370
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Mon 8/178:15 am -
Nonstop1h 40m
Sun 8/236:43 pm -
Nonstop1h 54m
Deal found 8/5$380
This United Airlines deal was found by Cheapflights users on 8/6. 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 8/138:15 am -
Nonstop1h 40m
Sun 8/166:43 pm -
Nonstop1h 54m
Deal found 8/6$430
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Thu 9/38:15 am -
Nonstop1h 40m
Mon 9/78:10 am -
1 stop24h 29m
Deal found 8/8$431
This United Airlines deal was found by Cheapflights users on 8/7. 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 12/48:17 am -
1 stop8h 37m
Mon 12/76:46 pm -
Nonstop1h 51m
Deal found 8/7$432
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 9/249:05 pm -
Nonstop1h 38m
Sat 9/268:35 am -
1 stop23h 04m
Deal found 8/10$441

Find flight deals from Denver to Sioux City

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Sioux City (SUX). 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 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$234
(United Airlines)

One-way from

$163
(United Airlines)

Popular in

February

Cheapest in

July

Average price

$274

Good round-trip deal

$234 or less

Good one-way deal

$163 or less
Provider with most accurate pricing for Denver Intl-Sioux City Sioux Gateway flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Sioux City Sioux Gateway flights.
Search Deals
From Denver Intl to Sioux City Sioux Gateway
Search Deals
One-way flight from Denver Intl to Sioux City Sioux Gateway
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Denver Intl to Sioux City Sioux Gateway.
Search Deals
Price to beat on a one-way flight from Denver Intl to Sioux City Sioux Gateway.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Sioux City 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 10, 2026.
Use the filters below to find and compare flights from Denver to Sioux City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverSioux City

DEN Denver Intl - SUX Sioux City Sioux Gateway

DENSUX

Denver Intl

Sat 8/29

8:15 am-10:55 am

Nonstop1h 40m

Sioux City Sioux Gateway

Mon 8/31

11:30 am-12:24 pm

Nonstop1h 54m

$234
Quickest round-trip

DenverSioux City

DEN Denver Intl - SUX Sioux City Sioux Gateway

DENSUX

Denver Intl

Sat 12/5

3:35 pm-6:11 pm

Nonstop1h 36m

Sioux City Sioux Gateway

Wed 12/9

6:46 pm-7:37 pm

Nonstop1h 51m

$274

DenverSioux City

DEN Denver Intl - SUX Sioux City Sioux Gateway

DENSUX

Denver Intl

Mon 9/7

8:15 am-10:55 am

Nonstop1h 40m

Sioux City Sioux Gateway

Mon 9/14

6:35 pm-7:29 pm

Nonstop1h 54m

$274

DenverSioux City

DEN Denver Intl - SUX Sioux City Sioux Gateway

DENSUX

Denver Intl

Sat 9/5

8:15 am-10:55 am

Nonstop1h 40m

Sioux City Sioux Gateway

Sun 9/6

11:30 am-12:24 pm

Nonstop1h 54m

$274

DenverSioux City

DEN Denver Intl - SUX Sioux City Sioux Gateway

DENSUX

Denver Intl

Fri 8/28

9:05 pm-11:43 pm

Nonstop1h 38m

Sioux City Sioux Gateway

Mon 8/31

6:43 pm-7:37 pm

Nonstop1h 54m

$274

DenverSioux City

DEN Denver Intl - SUX Sioux City Sioux Gateway

DENSUX

Denver Intl

Thu 9/3

8:15 am-10:55 am

Nonstop1h 40m

Sioux City Sioux Gateway

Mon 9/7

11:30 am-12:24 pm

Nonstop1h 54m

$274

DenverSioux City

DEN Denver Intl - SUX Sioux City Sioux Gateway

DENSUX

Denver Intl

Fri 9/18

9:05 pm-11:43 pm

Nonstop1h 38m

Sioux City Sioux Gateway

Sun 9/20

6:35 pm-7:29 pm

Nonstop1h 54m

$282

DenverSioux City

DEN Denver Intl - SUX Sioux City Sioux Gateway

DENSUX

Denver Intl

Thu 10/8

9:05 pm-11:43 pm

Nonstop1h 38m

Sioux City Sioux Gateway

Tue 10/13

6:58 pm-7:52 pm

Nonstop1h 54m

$322

DenverSioux City

DEN Denver Intl - SUX Sioux City Sioux Gateway

DENSUX

Denver Intl

Fri 9/4

8:15 am-10:55 am

Nonstop1h 40m

Sioux City Sioux Gateway

Sat 9/5

11:30 am-12:24 pm

Nonstop1h 54m

$330

DenverSioux City

DEN Denver Intl - SUX Sioux City Sioux Gateway

DENSUX

Denver Intl

Thu 9/24

9:05 pm-11:43 pm

Nonstop1h 38m

Sioux City Sioux Gateway

Sat 9/26

6:58 pm-7:52 pm

Nonstop1h 54m

$330

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/9

Showing 1-10 of 17 resultsSorted by cheapest first
1
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Compare providers for flights from Denver 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 Denver to Sioux City in August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 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 Denver-Sioux City flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Sioux City flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Sioux City flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Sioux City 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 Denver-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 Denver to Sioux City

Have a flexible travel schedule? Discover the best time to fly to Sioux City from Denver 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 Denver to Sioux City

What is the cheapest month to book a flight from Denver to Sioux City?

Currently, July is the cheapest month in which you can book a flight from Denver to Sioux City (average of $234). Flying from Denver to Sioux City in February is currently the most expensive (average of $433). 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.

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

Find hourly flight availability from Denver to Sioux City. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 10, 2026.

It’s optimal to fly from Denver to Sioux City in the evening. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight in the afternoon.

How much does it cost to fly round-trip from Denver to Sioux City?

Airfare is typical for this route at the moment.

Denver to Sioux City flights typically cost between $234 and $274 in September.
The cheapest round-trip price found within the last 5 days was $234 on United Airlines (Sep 7-Sep 13).

Reviews of airlines servicing Sioux City

Get insights into the airlines that provide service to Sioux City. 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 Sioux City. Reviews last updated August 10, 2026.
Read reviews from past customers who have flown United Airlines from Denver to Sioux City. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,099 reviews

Food

6.7

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
10,099 reviews
United Airlines
7.4
Good
10,099 reviews

Food

6.7

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

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

  • What airports do I use to fly from Denver to Sioux City?

    If you wish to fly to Sioux City from Denver, then you need to book flights from Denver Intl to Sioux City Sioux Gateway. There is 1 flight from Denver Intl (DEN) to Sioux Gateway (SUX) per day to choose from. Flights to Sioux City from Denver Intl are available from 1 airline, which means you should have some options if you want to compare airfare deals. 1h 36m is how long a nonstop flight from Denver to Sioux City Sioux Gateway typically takes.

  • How long is the flight from Denver to Sioux City?

    United Airlines can get you from Denver to Sioux City in just under 1h 40m. Your travel time will be generally consistent. There are 465 mi between Denver and Sioux City. Generally, flights for this route are nonstop.

  • What is the cheapest airline to fly from Denver to Sioux City round-trip?

    United Airlines, at $214, was found to be the cheapest airline from Denver to Sioux City.. Users have found that United Airlines is 35% cheaper than the other options available to this destination.

  • What are the cheapest flights from Denver to Sioux City?

    Looking at all options, your cheapest flight can be booked for $163. While the most popular route (Denver Intl - Sioux City Sioux Gateway) can be booked for $234 on average, our data indicates $228 when flying from Denver to Sioux City.

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

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

  • How can I find direct flights from Denver to Sioux City?

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

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

    Yes. Cheapflights offers flight deals from Denver 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.

  • What is the cheapest month to book a flight from Denver to Sioux City?

    Currently, July is the cheapest month in which you can book a flight from Denver to Sioux City (average of $234). Flying from Denver to Sioux City in February is currently the most expensive (average of $433). 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

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Denver to Sioux City

Discover the top airline that operate flights from Denver to Sioux City. 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 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$278FlexibilityNo cancel feeOn-time69%

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