$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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SUX
Oct 2 — Oct 91
Round-trip
1 adult, Economy
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Find cheap flights from Denver to Sioux City with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Denver to Sioux City
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Best
Last-minute
One-way
Cheapest flights from Denver to Sioux CityExplore 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 September 2, 2026.
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 September 2, 2026.
This United Airlines deal was found by Cheapflights users on 9/2. 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.
Wed 9/309:05 pm -
Nonstop1h 38m
Wed 10/76:58 pm -
Nonstop1h 54m
Deal found 9/2![United Airlines logo]()
$234
This United Airlines deal was found by Cheapflights users on 8/30. 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 10/249:05 pm -
Nonstop1h 38m
Sat 10/316:45 pm -
Nonstop1h 56m
Deal found 8/30![United Airlines logo]()
$248
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/179:05 pm -
Nonstop1h 38m
Mon 9/216:35 pm -
Nonstop1h 54m
Deal found 8/31![United Airlines logo]()
$282
This United Airlines deal was found by Cheapflights users on 9/1. 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.
Wed 9/169:05 pm -
Nonstop1h 38m
Sun 9/206:35 pm -
Nonstop1h 54m
Deal found 9/1![United Airlines logo]()
$330
This United Airlines deal was found by Cheapflights users on 9/1. 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 9/179:05 pm -
Nonstop1h 38m
Sun 9/206:35 pm -
Nonstop1h 54m
Deal found 9/1![United Airlines logo]()
$370
This United Airlines deal was found by Cheapflights users on 8/31. 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
Sun 9/276:58 pm -
Nonstop1h 54m
Deal found 8/31![United Airlines logo]()
$382
This United Airlines deal was found by Cheapflights users on 8/30. 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 12/259:02 pm -
Nonstop1h 42m
Tue 1/59:03 am -
2 stops25h 59m
Deal found 8/30![United Airlines logo]()
$422
This United Airlines deal was found by Cheapflights users on 8/29. 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 9/58:15 am -
Nonstop1h 40m
Tue 9/86:35 pm -
Nonstop1h 54m
Deal found 8/29![United Airlines logo]()
$430
This United Airlines deal was found by Cheapflights users on 9/1. 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 10/23:48 pm -
1 stop25h 05m
Fri 10/96:58 pm -
Nonstop1h 54m
Deal found 9/1![United Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 8/31. 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 11/59:05 pm -
Nonstop1h 38m
Mon 11/96:00 am -
1 stop27h 46m
Deal found 8/31![United Airlines logo]()
$441
Best flights from Denver to Sioux CityDiscover carefully curated flight deals from Denver to Sioux City that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 2, 2026.
Discover carefully curated flight deals from Denver to Sioux City that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 2, 2026.
This United Airlines deal was found by Cheapflights users on 8/31. 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 11/69:05 pm -
Nonstop1h 38m
Mon 11/96:45 pm -
Nonstop1h 56m
Deal found 8/31![United Airlines logo]()
$234
This United Airlines deal was found by Cheapflights users on 9/1. 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.
Wed 9/169:05 pm -
Nonstop1h 38m
Sun 9/206:35 pm -
Nonstop1h 54m
Deal found 9/1![United Airlines logo]()
$330
This United Airlines deal was found by Cheapflights users on 9/1. 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 9/179:05 pm -
Nonstop1h 38m
Sun 9/206:35 pm -
Nonstop1h 54m
Deal found 9/1![United Airlines logo]()
$370
This United Airlines deal was found by Cheapflights users on 8/31. 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 11/59:05 pm -
Nonstop1h 38m
Mon 11/96:00 am -
1 stop27h 46m
Deal found 8/31![United Airlines logo]()
$441
This United Airlines deal was found by Cheapflights users on 9/2. 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.
Wed 9/309:05 pm -
Nonstop1h 38m
Wed 10/78:35 am -
2 stops23h 15m
Deal found 9/2![United Airlines logo]()
$498
This United Airlines deal was found by Cheapflights users on 8/30. 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 10/239:05 pm -
Nonstop1h 38m
Sat 10/316:00 am -
2 stops13h 10m
Deal found 8/30![United Airlines logo]()
$546
Last-minute flights from Denver to Sioux CityDiscover last-minute flight deals from Denver to Sioux City. Data last updated September 2, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Sioux City. Data last updated September 2, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/29. 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 8/29![United Airlines logo]()
$480
This United Airlines deal was found by Cheapflights users on 8/29. 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 9/58:15 am -
Nonstop1h 40m
Tue 9/86:35 pm -
Nonstop1h 54m
Deal found 8/29![United Airlines logo]()
$430
This United Airlines deal was found by Cheapflights users on 9/1. 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.
Wed 9/169:05 pm -
Nonstop1h 38m
Sun 9/206:35 pm -
Nonstop1h 54m
Deal found 9/1![United Airlines logo]()
$330
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/179:05 pm -
Nonstop1h 38m
Mon 9/216:35 pm -
Nonstop1h 54m
Deal found 8/31![United Airlines logo]()
$282
This United Airlines deal was found by Cheapflights users on 9/1. 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 9/179:05 pm -
Nonstop1h 38m
Sun 9/206:35 pm -
Nonstop1h 54m
Deal found 9/1![United Airlines logo]()
$370
This United Airlines deal was found by Cheapflights users on 8/31. 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
Sun 9/276:58 pm -
Nonstop1h 54m
Deal found 8/31![United Airlines logo]()
$382
This United Airlines deal was found by Cheapflights users on 9/2. 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.
Wed 9/309:05 pm -
Nonstop1h 38m
Wed 10/76:58 pm -
Nonstop1h 54m
Deal found 9/2![United Airlines logo]()
$234
This United Airlines deal was found by Cheapflights users on 9/1. 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 10/23:48 pm -
1 stop25h 05m
Fri 10/96:58 pm -
Nonstop1h 54m
Deal found 9/1![United Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 8/30. 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 10/249:05 pm -
Nonstop1h 38m
Sat 10/316:45 pm -
Nonstop1h 56m
Deal found 8/30![United Airlines logo]()
$248
One-way flights from Denver to Sioux CitySearch for one-way flight options from Denver to Sioux City. Find affordable one-way fares based on user searches. Data last updated September 2, 2026.
Search for one-way flight options from Denver to Sioux City. Find affordable one-way fares based on user searches. Data last updated September 2, 2026.
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/149:05 pm -
Nonstop1h 38m
Deal found 8/31![United Airlines logo]()
$163
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/159:05 pm -
Nonstop1h 38m
Deal found 8/31![United Airlines logo]()
$183
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/119:05 pm -
Nonstop1h 38m
Deal found 8/31![United Airlines logo]()
$213
This United Airlines deal was found by Cheapflights users on 9/1. 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 12/36:15 am -
1 stop10h 39m
Deal found 9/1![United Airlines logo]()
$325
This United Airlines deal was found by Cheapflights users on 9/2. 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 10/48:29 pm -
1 stop20h 24m
Deal found 9/2![United Airlines logo]()
$389
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/185:30 pm -
2 stops23h 23m
Deal found 8/31![United Airlines logo]()
$408
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/178:29 pm -
1 stop20h 24m
Deal found 8/31![United Airlines logo]()
$430
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 September 2, 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 | $410 |
Good round-trip deal | $217 or less |
Good one-way deal | $163 or less |
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 7,457,451 searches. Data last updated September 2, 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
Cheapest round-trip
DenverSioux City
DEN Denver Intl - SUX Sioux City Sioux Gateway
DENSUX
Denver Intl
Fri 11/6
9:05 pm-11:43 pm
Nonstop1h 38m
Sioux City Sioux Gateway
Mon 11/9
6:45 pm-7:41 pm
Nonstop1h 56m
$234
Quickest round-trip
DenverSioux City
DEN Denver Intl - SUX Sioux City Sioux Gateway
DENSUX
Denver Intl
Wed 9/16
9:05 pm-11:43 pm
Nonstop1h 38m
Sioux City Sioux Gateway
Sun 9/20
6:35 pm-7:29 pm
Nonstop1h 54m
$330
DenverSioux City
DEN Denver Intl - SUX Sioux City Sioux Gateway
DENSUX
Denver Intl
Thu 9/17
9:05 pm-11:43 pm
Nonstop1h 38m
Sioux City Sioux Gateway
Sun 9/20
6:35 pm-7:29 pm
Nonstop1h 54m
$370
DenverSioux City
DEN Denver Intl - SUX Sioux City Sioux Gateway
DENSUX
Denver Intl
Thu 11/5
9:05 pm-11:43 pm
Nonstop1h 38m
Sioux City Sioux Gateway
Mon 11/9
6:00 am-8:46 am
1 stop27h 46m
$441
DenverSioux City
DEN Denver Intl - SUX Sioux City Sioux Gateway
DENSUX
Denver Intl
Wed 9/30
9:05 pm-11:43 pm
Nonstop1h 38m
Sioux City Sioux Gateway
Wed 10/7
8:35 am-6:50 am
2 stops23h 15m
$498
DenverSioux City
DEN Denver Intl - SUX Sioux City Sioux Gateway
DENSUX
Denver Intl
Fri 10/23
9:05 pm-11:43 pm
Nonstop1h 38m
Sioux City Sioux Gateway
Sat 10/31
6:00 am-6:10 pm
2 stops13h 10m
$546
Cheapest one-way
Quickest one-way
DenverSioux City
DEN Denver Intl - SUX Sioux City Sioux Gateway
DENSUX
Denver Intl
Sun 10/4
9:05 pm-11:43 pm
Nonstop1h 38m
$183
DenverSioux City
DEN Denver Intl - SUX Sioux City Sioux Gateway
DENSUX
Denver Intl
Fri 9/18
9:05 pm-11:43 pm
Nonstop1h 38m
$183
DenverSioux City
DEN Denver Intl - SUX Sioux City Sioux Gateway
DENSUX
Denver Intl
Thu 9/17
9:05 pm-11:43 pm
Nonstop1h 38m
$183
DenverSioux City
DEN Denver Intl - SUX Sioux City Sioux Gateway
DENSUX
Denver Intl
Fri 9/11
9:05 pm-11:43 pm
Nonstop1h 38m
$213
Showing 1-10 of 12 resultsSorted by cheapest first
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
DEN-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.
Cheapflights Insights
Everything you need to know about your flight from Denver to Sioux City
Prices
Airlines
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 September 2, 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.
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 September 2, 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.
Entertainment
7.1
Crew
8.1
Food
6.6
Boarding
7.7
Overall
7.4
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Entertainment
7.1
Crew
8.1
Food
6.6
Boarding
7.7
Overall
7.4
Comfort
7.3
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
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.
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Complete your trip
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Denver and Sioux City flights
Browse other Denver and Sioux City flight options. Last updated on September 2, 2026.
Other flights from Denver
Browse through other flights departing from Denver. Flights are based on user searches made on Cheapflights and were last updated on September 2, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Sioux City
Explore flights to Sioux City departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 2, 2026.
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 7,457,451 searches. Data last updated September 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$214 | Average$278 | FlexibilityNo cancel fee | On-time69% |