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Sioux City

$112+ Cheap flights from Colorado to Sioux City (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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SUX
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap flight deals from Colorado to Sioux City

Cheapest flights from Colorado to Sioux City
Explore the most affordable flight options available from Colorado to Sioux City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/4. 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 12/318:15 amDEN - SUX
Nonstop1h 50mUnited Airlines
Sun 1/46:54 pmSUX - DEN
Nonstop1h 57mUnited Airlines
Deal found 12/4$254
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Sat 12/203:35 pmDEN - SUX
Nonstop1h 38mUnited Airlines
Wed 12/246:54 pmSUX - DEN
Nonstop1h 57mUnited Airlines
Deal found 12/2$262
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Thu 12/183:35 pmDEN - SUX
Nonstop1h 38mUnited Airlines
Wed 12/246:54 pmSUX - DEN
Nonstop1h 57mUnited Airlines
Deal found 12/2$302
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/123:35 pmDEN - SUX
Nonstop1h 35mUnited Airlines
Thu 1/16:54 pmSUX - DEN
Nonstop1h 57mUnited Airlines
Deal found 12/3$312
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/183:35 pmDEN - SUX
Nonstop1h 38mUnited Airlines
Mon 12/226:54 pmSUX - DEN
Nonstop1h 57mUnited Airlines
Deal found 12/3$330
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/123:35 pmDEN - SUX
Nonstop1h 35mUnited Airlines
Wed 12/3111:48 amSUX - DEN
Nonstop1h 57mUnited Airlines
Deal found 12/3$360
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/123:35 pmDEN - SUX
Nonstop1h 35mUnited Airlines
Mon 1/57:50 amSUX - DEN
1 stop26h 05mUnited Airlines
Deal found 12/3$403
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Thu 12/113:35 pmDEN - SUX
Nonstop1h 35mUnited Airlines
Sun 12/146:52 pmSUX - DEN
Nonstop1h 48mUnited Airlines
Deal found 12/2$410
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/1712:32 pmCOS - SUX
1 stop4h 38mUnited Airlines
Sun 12/216:54 pmSUX - COS
1 stop6h 05mUnited Airlines
Deal found 12/2$444
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/123:35 pmDEN - SUX
Nonstop1h 35mUnited Airlines
Fri 1/26:54 pmSUX - DEN
Nonstop1h 57mUnited Airlines
Deal found 12/3$460

Find flight deals from Colorado to Sioux City

Keep the following information in mind while searching for Colorado to Sioux City flight deals. Data was last updated December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$214
(United Airlines)

One-way from

$112
(United Airlines)

Popular in

April

Cheapest in

February

Average price

$350

Good one-way deal

$173 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 Colorado to Sioux City Sioux Gateway
Search Deals
One-way flight from Colorado to Sioux City Sioux Gateway
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($49 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a one-way flight from Colorado to Sioux City Sioux Gateway.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado 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 December 4, 2025.
Use the filters below to find and compare flights from Colorado to Sioux City that are best for you.

Fly from

Colorado

Fly to

Sioux City

Route

Depart

Return

Price

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 1/1

3:35 pm-6:13 pm

Nonstop1h 38m

Sioux City Sioux Gateway

Thu 1/8

6:00 am-6:57 am

Nonstop1h 57m

$214

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Wed 12/31

8:15 am-11:05 am

Nonstop1h 50m

Sioux City Sioux Gateway

Sun 1/4

6:54 pm-7:51 pm

Nonstop1h 57m

$254

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Sat 2/14

9:05 pm-11:42 pm

Nonstop1h 37m

Sioux City Sioux Gateway

Wed 2/18

6:00 am-6:54 am

Nonstop1h 54m

$254

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Sat 12/20

3:35 pm-6:13 pm

Nonstop1h 38m

Sioux City Sioux Gateway

Wed 12/24

6:54 pm-7:51 pm

Nonstop1h 57m

$262

Colorado SpringsSioux City

COS - SUX

COSSUX

Colorado Springs

Sat 1/24

5:50 am-10:55 am

1 stop4h 05m

Sioux City Sioux Gateway

Wed 1/28

6:43 pm-10:06 pm

1 stop4h 23m

$274

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 12/18

3:35 pm-6:13 pm

Nonstop1h 38m

Sioux City Sioux Gateway

Wed 12/24

6:54 pm-7:51 pm

Nonstop1h 57m

$302

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 12/12

3:35 pm-6:10 pm

Nonstop1h 35m

Sioux City Sioux Gateway

Mon 1/5

6:54 pm-7:51 pm

Nonstop1h 57m

$312

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 12/12

3:35 pm-6:10 pm

Nonstop1h 35m

Sioux City Sioux Gateway

Sat 1/3

6:54 pm-7:51 pm

Nonstop1h 57m

$312

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 12/12

3:35 pm-6:10 pm

Nonstop1h 35m

Sioux City Sioux Gateway

Thu 1/1

6:54 pm-7:51 pm

Nonstop1h 57m

$312

Colorado SpringsSioux City

COS - SUX

COSSUX

Colorado Springs

Wed 12/17

12:32 pm-6:10 pm

1 stop4h 38m

Sioux City Sioux Gateway

Sun 12/21

6:54 pm-11:59 pm

1 stop6h 05m

$444

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 13 results
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Best time to book a flight from Colorado to Sioux City

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

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

Currently, March is the cheapest month in which you can book a flight from Colorado to Sioux City (average of $39). Flying from Colorado to Sioux City in April is currently the most expensive (average of $88). 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 CO to SUX?

Find hourly flight availability from Colorado 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 December 4, 2025.

One of the essential ways to save on airfare from Colorado to Sioux City is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 44% on airfare.

Related info for your journey

Find useful and relevant information for your journey from Colorado 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 airport do you fly into for flights to Sioux City from Colorado?

    Sioux City Sioux Gateway (SUX), located 7.0 mi from the city center, is the airport you fly into when you book flights from Colorado to Sioux City.

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

    There are many flights that can get you from Colorado to Sioux City in 1h 38m. Fly via United Airlines to get the fastest option. The distance between Colorado and Sioux City is about 465 mi. Generally, flights for this route are nonstop.

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

    On average you can expect to pay $173 for a flight from Colorado to Sioux City. The cheapest flight overall is $153 while the most popular route, (Denver Intl - Sioux City Sioux Gateway) is currently priced at $214.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Colorado 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 Colorado to Sioux City?

    Currently, March is the cheapest month in which you can book a flight from Colorado to Sioux City (average of $39). Flying from Colorado to Sioux City in April is currently the most expensive (average of $88). 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

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Alternative routes for Colorado to Sioux City

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Top airline flying from Colorado to Sioux City

Discover the top airline that operate flights from Colorado 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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$350FlexibilityNo cancel feeOn-time69%

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