$188+ Cheap flights from Sioux City to Denver (SUX - DEN)
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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
SUX — DEN
Nov 25 — Dec 21
Round-trip
1 adult, Economy
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Find cheap flights from Sioux City to Denver 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 Sioux City to Denver
Cheapest
Best
Last-minute
One-way
Cheapest flights from Sioux City to DenverExplore the most affordable flight options available from Sioux City to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 26, 2026.
Explore the most affordable flight options available from Sioux City to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 26, 2026.
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/136:45 pm -
Nonstop1h 56m
Sun 11/159:05 pm -
Nonstop1h 38m
Deal found 10/23![United Airlines logo]()
$274
This United Airlines deal was found by Cheapflights users on 10/25. 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 11/216:45 pm -
Nonstop1h 56m
Sat 11/289:05 pm -
Nonstop1h 38m
Deal found 10/25![United Airlines logo]()
$362
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/66:45 pm -
Nonstop1h 56m
Sun 11/89:05 pm -
Nonstop1h 38m
Deal found 10/23![United Airlines logo]()
$370
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/86:45 pm -
Nonstop1h 56m
Thu 11/129:05 pm -
Nonstop1h 38m
Deal found 10/23![United Airlines logo]()
$381
This United Airlines deal was found by Cheapflights users on 10/24. 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 12/296:46 pm -
Nonstop1h 59m
Sat 1/29:02 pm -
Nonstop1h 42m
Deal found 10/24![United Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/126:45 pm -
Nonstop1h 56m
Sat 11/149:05 pm -
Nonstop1h 38m
Deal found 10/22![United Airlines logo]()
$410
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/46:45 pm -
Nonstop1h 56m
Sun 11/89:05 pm -
Nonstop1h 38m
Deal found 10/22![United Airlines logo]()
$420
Best flights from Sioux City to DenverDiscover carefully curated flight deals from Sioux City to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 26, 2026.
Discover carefully curated flight deals from Sioux City to Denver that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 26, 2026.
This United Airlines deal was found by Cheapflights users on 10/24. 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 11/136:45 pm -
Nonstop1h 56m
Sun 11/159:05 pm -
Nonstop1h 38m
Deal found 10/24![United Airlines logo]()
$322
This United Airlines deal was found by Cheapflights users on 10/25. 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 11/126:45 pm -
Nonstop1h 56m
Sat 11/149:05 pm -
Nonstop1h 38m
Deal found 10/25![United Airlines logo]()
$370
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/216:00 am -
1 stop17h 30m
Sat 11/289:05 pm -
Nonstop1h 38m
Deal found 10/22![United Airlines logo]()
$504
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/86:45 pm -
Nonstop1h 56m
Thu 11/127:45 am -
1 stop9h 25m
Deal found 10/23![United Airlines logo]()
$544
This United Airlines deal was found by Cheapflights users on 10/25. 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 11/256:45 pm -
Nonstop1h 56m
Tue 12/13:50 pm -
1 stop25h 15m
Deal found 10/25![United Airlines logo]()
$593
Last-minute flights from Sioux City to DenverDiscover last-minute flight deals from Sioux City to Denver. Data last updated October 26, 2026 and is based on user searches.
Discover last-minute flight deals from Sioux City to Denver. Data last updated October 26, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/46:45 pm -
Nonstop1h 56m
Sun 11/89:05 pm -
Nonstop1h 38m
Deal found 10/22![United Airlines logo]()
$420
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/66:45 pm -
Nonstop1h 56m
Sun 11/89:05 pm -
Nonstop1h 38m
Deal found 10/23![United Airlines logo]()
$370
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/86:45 pm -
Nonstop1h 56m
Thu 11/129:05 pm -
Nonstop1h 38m
Deal found 10/23![United Airlines logo]()
$381
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/126:45 pm -
Nonstop1h 56m
Sat 11/149:05 pm -
Nonstop1h 38m
Deal found 10/22![United Airlines logo]()
$410
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/136:45 pm -
Nonstop1h 56m
Sun 11/159:05 pm -
Nonstop1h 38m
Deal found 10/23![United Airlines logo]()
$274
This United Airlines deal was found by Cheapflights users on 10/25. 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 11/216:45 pm -
Nonstop1h 56m
Sat 11/289:05 pm -
Nonstop1h 38m
Deal found 10/25![United Airlines logo]()
$362
This United Airlines deal was found by Cheapflights users on 10/25. 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 11/236:45 pm -
Nonstop1h 56m
Tue 11/249:05 pm -
Nonstop1h 38m
Deal found 10/25![United Airlines logo]()
$496
One-way flights from Sioux City to DenverSearch for one-way flight options from Sioux City to Denver. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
Search for one-way flight options from Sioux City to Denver. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/66:45 pm -
Nonstop1h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![United Airlines logo]()
$188
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/96:45 pm -
Nonstop1h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$208
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/16:45 pm -
Nonstop1h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$238
This United Airlines deal was found by Cheapflights users on 10/24. 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 12/296:46 pm -
Nonstop1h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![United Airlines logo]()
$245
This United Airlines deal was found by Cheapflights users on 10/25. 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 10/316:45 pm -
Nonstop1h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![United Airlines logo]()
$288
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/106:00 am -
2 stops13h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$314
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/136:00 am -
2 stops29h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$411
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/116:00 am -
2 stops26h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 10/23. 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 11/86:00 am -
2 stops26h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![United Airlines logo]()
$447
Find flight deals from Sioux City to Denver
Discover tips and strategies to find the most affordable flight options for your journey from Sioux City (SUX) to Denver (DEN). 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 October 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $274 (United Airlines) |
One-way from | $188 (United Airlines) |
Popular in | November |
Cheapest in | March |
Average price | $330 |
Good round-trip deal | $410 or less |
Good one-way deal | $333 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Sioux City to Denver 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 October 26, 2026.
Use the filters below to find and compare flights from Sioux City to Denver that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
Sioux CityDenver
SUX Sioux City Sioux Gateway - DEN Denver Intl
SUXDEN
Sioux City Sioux Gateway
Tue 11/10
6:45 pm-7:41 pm
Nonstop1h 56m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$188
Sioux CityDenver
SUX Sioux City Sioux Gateway - DEN Denver Intl
SUXDEN
Sioux City Sioux Gateway
Mon 11/9
6:45 pm-7:41 pm
Nonstop1h 56m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$208
Sioux CityDenver
SUX Sioux City Sioux Gateway - DEN Denver Intl
SUXDEN
Sioux City Sioux Gateway
Thu 11/12
6:45 pm-7:41 pm
Nonstop1h 56m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$208
Sioux CityDenver
SUX Sioux City Sioux Gateway - DEN Denver Intl
SUXDEN
Sioux City Sioux Gateway
Wed 11/4
6:45 pm-7:41 pm
Nonstop1h 56m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$238
Sioux CityDenver
SUX Sioux City Sioux Gateway - DEN Denver Intl
SUXDEN
Sioux City Sioux Gateway
Sun 11/1
6:45 pm-7:41 pm
Nonstop1h 56m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$288
Sioux CityDenver
SUX Sioux City Sioux Gateway - DEN Denver Intl
SUXDEN
Sioux City Sioux Gateway
Sun 11/15
6:45 pm-7:41 pm
Nonstop1h 56m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$288
Sioux CityDenver
SUX Sioux City Sioux Gateway - DEN Denver Intl
SUXDEN
Sioux City Sioux Gateway
Fri 11/13
6:45 pm-7:41 pm
Nonstop1h 56m
Denver Intl
Sun 11/15
9:05 pm-11:43 pm
Nonstop1h 38m
$322
Sioux CityDenver
SUX Sioux City Sioux Gateway - DEN Denver Intl
SUXDEN
Sioux City Sioux Gateway
Thu 11/12
6:45 pm-7:41 pm
Nonstop1h 56m
Denver Intl
Sat 11/14
9:05 pm-11:43 pm
Nonstop1h 38m
$370
Sioux CityDenver
SUX Sioux City Sioux Gateway - DEN Denver Intl
SUXDEN
Sioux City Sioux Gateway
Sat 11/14
6:00 am-6:23 pm
2 stops13h 23m
Denver Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$487
Sioux CityDenver
SUX Sioux City Sioux Gateway - DEN Denver Intl
SUXDEN
Sioux City Sioux Gateway
Sat 11/21
6:00 am-10:30 pm
1 stop17h 30m
Denver Intl
Sat 11/28
9:05 pm-11:43 pm
Nonstop1h 38m
$504
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Sioux City to Denver
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 Sioux City to Denver in October.
| 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 Sioux City-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sioux City-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sioux City-Denver flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Sioux City-Denver 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 Sioux City-Denver 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 Sioux City to Denver
Have a flexible travel schedule? Discover the best time to fly to Denver from Sioux City with our price prediction graph.
SUX-DEN
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 Sioux City to Denver
Prices
Airlines
What is the cheapest month to book a flight from Sioux City to Denver?
Currently, March is the cheapest month in which you can book a flight from Sioux City to Denver (average of $214). Flying from Sioux City to Denver in November is currently the most expensive (average of $430). 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 SUX to DEN?
Find hourly flight availability from Sioux City to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 26, 2026.
When flying from Sioux City to Denver, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Reviews of airlines servicing Denver
Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated October 26, 2026.
Read reviews from past customers who have flown United Airlines from Sioux City to Denver. 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.
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Overall
7.3
Crew
8.1
Food
6.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Boarding
7.7
Comfort
7.3
Entertainment
7.1
Overall
7.3
Crew
8.1
Food
6.7
Reviews
1 / 20
2.0
MediocreDawn,Aug 2026
ORD - DEN
Related info for your journey
Find useful and relevant information for your journey from Sioux City to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Denver?
Book flights to Denver if you plan to visit one of these locationsThornton
Westminster
Lakewood
Centennial
Broomfield
Englewood
Golden
Wheat Ridge
Silverthorne
Fort Morgan
Limon
Greeley
Frisco
Winter Park
Black Hawk
Central City
Manitou Springs
Glendale
Cripple Creek
Evergreen
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Other flights to Denver
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Sioux City and Denver flights
Browse other Sioux City and Denver flight options. Last updated on October 26, 2026.
Other flights from Sioux City
Browse through other flights departing from Sioux City. Flights are based on user searches made on Cheapflights and were last updated on October 26, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top airline flying from Sioux City to Denver
Discover the top airline that operate flights from Sioux City to Denver. 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 October 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$214 | Average$262 | FlexibilityNo cancel fee | On-time69% |