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Sioux City

$153+ 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 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SUX
Mar 18 — Mar 251
Wed 3/18
Wed 3/25
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 February 16, 2026.

This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/208:05 am
DEN
-
SUX
Nonstop1h 40m
United Airlines
Fri 3/276:30 pm
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 2/11$214
This United Airlines deal was found by Cheapflights users on 2/13. 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 4/248:05 am
DEN
-
SUX
Nonstop1h 41m
United Airlines
Sun 4/266:00 am
SUX
-
DEN
Nonstop1h 53m
United Airlines
Deal found 2/13$254
This United Airlines deal was found by Cheapflights users on 2/15. 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 3/69:04 pm
DEN
-
SUX
Nonstop1h 37m
United Airlines
Fri 3/136:30 pm
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 2/15$302
This United Airlines deal was found by Cheapflights users on 2/12. 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 2/279:05 pm
DEN
-
SUX
Nonstop1h 37m
United Airlines
Tue 3/36:00 am
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 2/12$310
This United Airlines deal was found by Cheapflights users on 2/13. 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 3/128:05 am
DEN
-
SUX
Nonstop1h 40m
United Airlines
Sat 3/146:10 am
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 2/13$350
This United Airlines deal was found by Cheapflights users on 2/12. 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 2/239:05 pm
DEN
-
SUX
Nonstop1h 37m
United Airlines
Thu 2/266:46 pm
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 2/12$360
This United Airlines deal was found by Cheapflights users on 2/14. 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 3/128:05 am
DEN
-
SUX
Nonstop1h 40m
United Airlines
Mon 3/1612:53 pm
SUX
-
DEN
1 stop22h 40m
United Airlines
Deal found 2/14$368
This United Airlines deal was found by Cheapflights users on 2/14. 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 3/268:23 pm
DEN
-
SUX
1 stop20h 18m
United Airlines
Sun 3/296:00 am
SUX
-
DEN
Nonstop1h 53m
United Airlines
Deal found 2/14$374
This United Airlines deal was found by Cheapflights users on 2/12. 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 4/28:05 am
DEN
-
SUX
Nonstop1h 41m
United Airlines
Sun 4/512:55 pm
SUX
-
DEN
1 stop28h 05m
United Airlines
Deal found 2/12$376

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 February 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$214
(United Airlines)

One-way from

$153
(United Airlines)

Popular in

February

Cheapest in

March

Average price

$433

Good round-trip deal

$297 or less
Provider with most accurate pricing for Denver Intl-Sioux City Sioux Gateway flight deals.
Search Deals
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
High demand for flights, 7% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip 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 February 16, 2026.
Use the filters below to find and compare flights from Denver to Sioux City that are best for you.

Fly from

Denver

Fly to

Sioux City

Route

Depart

Return

Price

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 3/13

8:05 am-10:45 am

Nonstop1h 40m

Sioux City Sioux Gateway

Fri 3/20

6:10 am-7:04 am

Nonstop1h 54m

$214

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 3/12

8:05 am-10:45 am

Nonstop1h 40m

Sioux City Sioux Gateway

Mon 3/16

6:30 pm-7:24 pm

Nonstop1h 54m

$214

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 3/26

8:05 am-10:45 am

Nonstop1h 40m

Sioux City Sioux Gateway

Sun 3/29

6:00 am-6:53 am

Nonstop1h 53m

$214

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 3/20

8:05 am-10:45 am

Nonstop1h 40m

Sioux City Sioux Gateway

Fri 3/27

6:30 pm-7:24 pm

Nonstop1h 54m

$214

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Tue 4/21

8:05 am-10:46 am

Nonstop1h 41m

Sioux City Sioux Gateway

Sun 4/26

6:00 am-6:53 am

Nonstop1h 53m

$214

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 3/27

9:04 pm-11:41 pm

Nonstop1h 37m

Sioux City Sioux Gateway

Sun 3/29

6:32 pm-7:25 pm

Nonstop1h 53m

$214

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 4/24

8:05 am-10:46 am

Nonstop1h 41m

Sioux City Sioux Gateway

Sun 4/26

6:00 am-6:53 am

Nonstop1h 53m

$254

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 4/2

8:05 am-10:46 am

Nonstop1h 41m

Sioux City Sioux Gateway

Sun 4/5

6:32 pm-7:25 pm

Nonstop1h 53m

$254

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Sat 4/4

8:05 am-10:46 am

Nonstop1h 41m

$153

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Mon 7/13

9:00 pm-11:42 pm

Nonstop1h 42m

$153

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/15

Showing 1-10 of 11 results
1
2

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 February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust 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, March is the cheapest month in which you can book a flight from Denver to Sioux City (average of $45). Flying from Denver to Sioux City in September is currently the most expensive (average of $84). 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 February 16, 2026.

It’s optimal to fly from Denver to Sioux City in the evening. By choosing this option you can save up to 39% on the cost of your flight, compared to a flight at noon.

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 February 16, 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
9,299 reviews

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

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
9,299 reviews
United Airlines
7.4
Good
9,299 reviews

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Boarding

7.7

Food

6.6

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 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 are 2 flights 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 40m 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 37% 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 $262. While the most popular route (Denver Intl - Sioux City Sioux Gateway) can be booked for $214 on average, our data indicates $334 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, March is the cheapest month in which you can book a flight from Denver to Sioux City (average of $45). Flying from Denver to Sioux City in September is currently the most expensive (average of $84). 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 February 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$350FlexibilityNo cancel feeOn-time69%

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