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$178+ Cheap flights from Sioux City (SUX) to Colorado

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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
SUX — DEN
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheap flight deals from Sioux City to Colorado

Keep the following information in mind while searching for Sioux City to Colorado flight deals. Data was last updated August 20, 2025.

Round-trip from

$254
(United Airlines)

One-way from

$178
(United Airlines)

Popular in

May

Cheapest in

March

Average price

$325

Good round-trip deal

$303 or less

Good one-way deal

$332 or less
From Sioux City Sioux Gateway to Colorado
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One-way flight from Sioux City Sioux Gateway to Colorado
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Highest demand for flights based on searches. 11% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Sioux City Sioux Gateway to Colorado.
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Price to beat on a one-way flight from Sioux City Sioux Gateway to Colorado.
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Find flight deals from Sioux City to Colorado

Cheapest flights from Sioux City to Colorado
Explore the most affordable flight options available from Sioux City to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2025.

This United Airlines deal was found by Cheapflights users on 8/18. 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 9/166:48 pmSUX - DEN
Nonstop1h 47mUnited Airlines
Tue 9/233:40 pmDEN - SUX
Nonstop1h 33mUnited Airlines
Deal found 8/18$254
This United Airlines deal was found by Cheapflights users on 8/19. 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 9/96:48 pmSUX - DEN
Nonstop1h 47mUnited Airlines
Sun 9/143:40 pmDEN - SUX
Nonstop1h 33mUnited Airlines
Deal found 8/19$262
This United Airlines deal was found by Cheapflights users on 8/20. 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 9/46:48 pmSUX - DEN
Nonstop1h 47mUnited Airlines
Mon 9/83:40 pmDEN - SUX
Nonstop1h 33mUnited Airlines
Deal found 8/20$310
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/116:48 pmSUX - DEN
Nonstop1h 47mUnited Airlines
Sun 9/143:40 pmDEN - SUX
Nonstop1h 33mUnited Airlines
Deal found 8/18$312
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/26:48 pmSUX - DEN
Nonstop1h 47mUnited Airlines
Fri 9/53:40 pmDEN - SUX
Nonstop1h 33mUnited Airlines
Deal found 8/18$350
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/236:48 pmSUX - DEN
Nonstop1h 47mUnited Airlines
Thu 9/253:40 pmDEN - SUX
Nonstop1h 34mUnited Airlines
Deal found 8/18$360
This United Airlines deal was found by Cheapflights users on 8/19. 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 10/96:51 pmSUX - DEN
Nonstop1h 49mUnited Airlines
Sun 10/123:40 pmDEN - SUX
Nonstop1h 34mUnited Airlines
Deal found 8/19$362
This United Airlines deal was found by Cheapflights users on 8/18. 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 9/156:48 pmSUX - DEN
Nonstop1h 47mUnited Airlines
Mon 9/226:26 pmDEN - SUX
2 stops27h 31mUnited Airlines
Deal found 8/18$378

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sioux City to Colorado 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 August 20, 2025.
Use the filters below to find and compare flights from Sioux City to Colorado that are best for you.

Fly from

Sioux City

Fly to

Colorado

Route

Depart

Return

Price

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Fri 9/19

6:48 pm-7:35 pm

Nonstop1h 47m

Denver Intl

Tue 9/23

3:40 pm-6:13 pm

Nonstop1h 33m

$254

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Sat 10/4

6:51 pm-7:40 pm

Nonstop1h 49m

Denver Intl

Sat 10/11

3:40 pm-6:14 pm

Nonstop1h 34m

$254

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Tue 9/16

6:48 pm-7:35 pm

Nonstop1h 47m

Denver Intl

Tue 9/23

3:40 pm-6:13 pm

Nonstop1h 33m

$254

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Mon 9/15

6:48 pm-7:35 pm

Nonstop1h 47m

Denver Intl

Mon 9/22

3:40 pm-6:13 pm

Nonstop1h 33m

$254

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Tue 9/9

6:48 pm-7:35 pm

Nonstop1h 47m

Denver Intl

Sun 9/14

3:40 pm-6:13 pm

Nonstop1h 33m

$262

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Fri 9/5

6:48 pm-7:35 pm

Nonstop1h 47m

Denver Intl

Sun 9/7

3:40 pm-6:13 pm

Nonstop1h 33m

$310

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Tue 9/23

6:48 pm-7:35 pm

Nonstop1h 47m

Denver Intl

Fri 9/26

3:40 pm-6:14 pm

Nonstop1h 34m

$310

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Thu 9/11

6:48 pm-7:35 pm

Nonstop1h 47m

Denver Intl

Sun 9/14

3:40 pm-6:13 pm

Nonstop1h 33m

$312

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Thu 10/9

6:51 pm-7:40 pm

Nonstop1h 49m

Denver Intl

Sun 10/12

3:40 pm-6:14 pm

Nonstop1h 34m

$312

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Tue 9/16

6:48 pm-7:35 pm

Nonstop1h 47m

$178

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 11 results
1
2

Best time to book a flight from Sioux City to Colorado

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

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

Currently, October is the cheapest month in which you can book a flight from Sioux City to Colorado (average of $197). Flying from Sioux City to Colorado in March is currently the most expensive (average of $278). 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 CO?

Find hourly flight availability from Sioux City to Colorado. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

When flying from Sioux City to Colorado, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Sioux City to Colorado

Explore weekly flight availability from Sioux City to Colorado. 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 August 20, 2025.

The most flights from SUX to USCO 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).

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated August 20, 2025.
Get a feel of what it's like to fly with United Airlines from Sioux City to Colorado by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,928 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,928 reviews
United Airlines
7.4
Good
8,928 reviews

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Sioux City to Colorado. 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 from for flights from Sioux City to Colorado?

    Sioux City Sioux Gateway (SUX) is the airport you will fly out of if you book a flight from Sioux City to Colorado. It is only a 7.0 mi journey to Sioux Gateway (SUX) from Sioux City’s city center.

  • How popular is this Sioux City to Colorado flight route?

    Flights from Sioux City Sioux Gateway to Colorado have been viewed 6 times in the past calendar month.

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

    A quick flight from Sioux City to Colorado can take about 1h 47m. United Airlines provides one of the quickest options available for as low as $254. Airlines will cover a distance of 465 mi. Most flights are nonstop.

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

    While on average a flight from Sioux City to Colorado is generally $689, our data shows the cheapest flight currently is $254. When looking at the most popular route, (Sioux City Sioux Gateway - Denver Intl), you can expect to pay $254 for that flight.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Sioux City to Colorado (average of $197). Flying from Sioux City to Colorado in March is currently the most expensive (average of $278). 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 Sioux City to Colorado

Discover the top airline that operate flights from Sioux City to Colorado. 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$194Average$266FlexibilityNo cancel feeOn-time69%

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