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Sioux City

$153+ 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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SUX
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheap 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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$214
(United Airlines)

One-way from

$153
(United Airlines)

Popular in

April

Cheapest in

February

Average price

$347

Good round-trip deal

$478 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.
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From Colorado to Sioux City Sioux Gateway
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One-way flight from Colorado to Sioux City Sioux Gateway
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Highest demand for flights based on searches. 12% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Colorado to Sioux City Sioux Gateway.
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Find 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 November 6, 2025.

This United Airlines deal was found by Cheapflights users on 11/5. 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.
Wed 12/33:35 pmDEN - SUX
Nonstop1h 35mUnited Airlines
Wed 12/106:52 pmSUX - DEN
Nonstop1h 48mUnited Airlines
Deal found 11/5$214
This United Airlines deal was found by Cheapflights users on 11/6. 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 12/183:35 pmDEN - SUX
Nonstop1h 38mUnited Airlines
Wed 12/246:54 pmSUX - DEN
Nonstop1h 57mUnited Airlines
Deal found 11/6$254
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Mon 12/223:35 pmDEN - SUX
Nonstop1h 38mUnited Airlines
Mon 12/296:54 pmSUX - DEN
Nonstop1h 57mUnited Airlines
Deal found 11/4$299
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 11/203:35 pmDEN - SUX
Nonstop1h 33mUnited Airlines
Mon 11/246:46 pmSUX - DEN
Nonstop1h 48mUnited Airlines
Deal found 11/5$310
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Thu 11/133:35 pmDEN - SUX
Nonstop1h 33mUnited Airlines
Sat 11/156:46 pmSUX - DEN
Nonstop1h 48mUnited Airlines
Deal found 11/4$410
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Thu 12/116:00 amDEN - SUX
1 stop15h 59mUnited Airlines
Sun 12/147:50 amSUX - DEN
1 stop26h 05mUnited Airlines
Deal found 11/5$436

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 November 6, 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 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

$214

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Wed 12/3

3:35 pm-6:10 pm

Nonstop1h 35m

Sioux City Sioux Gateway

Wed 12/10

6:52 pm-7:40 pm

Nonstop1h 48m

$214

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Mon 12/22

3:35 pm-6:13 pm

Nonstop1h 38m

Sioux City Sioux Gateway

Mon 12/29

6:54 pm-7:51 pm

Nonstop1h 57m

$299

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 11/20

3:35 pm-6:08 pm

Nonstop1h 33m

Sioux City Sioux Gateway

Mon 11/24

6:46 pm-7:34 pm

Nonstop1h 48m

$310

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 1/29

8:20 pm-5:28 pm

2 stops20h 08m

Sioux City Sioux Gateway

Mon 2/2

6:00 am-6:57 am

Nonstop1h 57m

$377

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 3/6

3:20 pm-5:32 pm

1 stop25h 12m

Sioux City Sioux Gateway

Sun 3/8

6:31 pm-7:28 pm

Nonstop1h 57m

$391

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 12/11

6:00 am-10:59 pm

1 stop15h 59m

Sioux City Sioux Gateway

Sun 12/14

6:52 pm-7:40 pm

Nonstop1h 48m

$393

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 11/21

3:35 pm-6:08 pm

Nonstop1h 33m

$153

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

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, November is the cheapest month in which you can book a flight from Colorado to Sioux City (average of $35). 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 November 6, 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.

Weekly flight availability from Colorado to Sioux City

Explore weekly flight availability from Colorado to Sioux City. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 6, 2025.

The most flights from USCO to SUX are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

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 $510 for a flight from Colorado to Sioux City. The cheapest flight overall is $262 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, November is the cheapest month in which you can book a flight from Colorado to Sioux City (average of $35). 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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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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$350FlexibilityNo cancel feeOn-time69%

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