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Sioux City

$173+ 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 9/18. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SUX
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
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 August 20, 2025.

Round-trip from

$244
(United Airlines)

One-way from

$173
(United Airlines)

Popular in

April

Cheapest in

December

Average price

$392
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. 18% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 20, 2025.

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.
Wed 9/31:55 pmCOS - SUX
1 stop3h 18mUnited Airlines
Sun 9/76:48 pmSUX - COS
1 stop4h 06mUnited Airlines
Deal found 8/19$244
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.
Fri 10/103:40 pmDEN - SUX
Nonstop1h 34mUnited Airlines
Mon 10/136:51 pmSUX - DEN
Nonstop1h 49mUnited Airlines
Deal found 8/18$254
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/33:40 pmDEN - SUX
Nonstop1h 34mUnited Airlines
Fri 10/106:51 pmSUX - DEN
Nonstop1h 49mUnited Airlines
Deal found 8/19$300
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 10/93:40 pmDEN - SUX
Nonstop1h 34mUnited Airlines
Sun 10/126:51 pmSUX - DEN
Nonstop1h 49mUnited Airlines
Deal found 8/18$302
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/31:55 pmCOS - SUX
1 stop3h 18mUnited Airlines
Sat 9/66:48 pmSUX - COS
1 stop4h 06mUnited Airlines
Deal found 8/17$314
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.
Wed 9/33:40 pmDEN - SUX
Nonstop1h 33mUnited Airlines
Sun 9/76:48 pmSUX - DEN
Nonstop1h 47mUnited Airlines
Deal found 8/19$350
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.
Fri 10/246:00 amDEN - SUX
1 stop16h 00mUnited Airlines
Mon 10/276:46 pmSUX - DEN
Nonstop1h 48mUnited Airlines
Deal found 8/19$369
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.
Fri 8/293:40 pmDEN - SUX
Nonstop1h 33mUnited Airlines
Sun 8/316:48 pmSUX - DEN
Nonstop1h 47mUnited Airlines
Deal found 8/19$410

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 August 20, 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

Colorado SpringsSioux City

COS - SUX

COSSUX

Colorado Springs

Wed 9/3

1:55 pm-6:13 pm

1 stop3h 18m

Sioux City Sioux Gateway

Sun 9/7

6:48 pm-9:54 pm

1 stop4h 06m

$244

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 10/24

3:40 pm-6:14 pm

Nonstop1h 34m

Sioux City Sioux Gateway

Mon 10/27

6:46 pm-7:34 pm

Nonstop1h 48m

$254

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 10/10

3:40 pm-6:14 pm

Nonstop1h 34m

Sioux City Sioux Gateway

Mon 10/13

6:51 pm-7:40 pm

Nonstop1h 49m

$254

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 10/3

3:40 pm-6:14 pm

Nonstop1h 34m

Sioux City Sioux Gateway

Fri 10/10

6:51 pm-7:40 pm

Nonstop1h 49m

$300

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 10/9

3:40 pm-6:14 pm

Nonstop1h 34m

Sioux City Sioux Gateway

Sun 10/12

6:51 pm-7:40 pm

Nonstop1h 49m

$302

Colorado SpringsSioux City

COS - SUX

COSSUX

Colorado Springs

Wed 9/3

1:55 pm-6:13 pm

1 stop3h 18m

Sioux City Sioux Gateway

Sat 9/6

6:48 pm-9:54 pm

1 stop4h 06m

$314

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Wed 9/3

3:40 pm-6:13 pm

Nonstop1h 33m

Sioux City Sioux Gateway

Sun 9/7

6:48 pm-7:35 pm

Nonstop1h 47m

$350

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 8/29

3:40 pm-6:13 pm

Nonstop1h 33m

Sioux City Sioux Gateway

Sun 8/31

6:48 pm-7:35 pm

Nonstop1h 47m

$410

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 9/18

3:40 pm-6:13 pm

Nonstop1h 33m

$173

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 8/28

3:40 pm-6:13 pm

Nonstop1h 33m

$203

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 12 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, October is the cheapest month in which you can book a flight from Colorado to Sioux City (average of $318). Flying from Colorado to Sioux City in March is currently the most expensive (average of $446). 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 August 20, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Sioux City as you normally would.

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 August 20, 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 3h 18m. Fly via United Airlines to get the fastest option. The distance between Colorado and Sioux City is about 501 mi.

  • 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, October is the cheapest month in which you can book a flight from Colorado to Sioux City (average of $318). Flying from Colorado to Sioux City in March is currently the most expensive (average of $446). 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

Traveling to a place near Sioux City?

Book flights to Sioux City if you plan to visit one of these locations
Norfolk

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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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$301FlexibilityNo cancel feeOn-time69%

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