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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 3/26. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SUX
Apr 12 — Apr 191
Sun 4/12
Sun 4/19
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 March 13, 2026.

This United Airlines deal was found by Cheapflights users on 3/11. 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 4/108:05 am
DEN
-
SUX
Nonstop1h 41m
United Airlines
Fri 4/176:00 am
SUX
-
DEN
Nonstop1h 53m
United Airlines
Deal found 3/11$214
This United Airlines deal was found by Cheapflights users on 3/10. 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 4/249:02 pm
DEN
-
SUX
Nonstop1h 42m
United Airlines
Sun 4/266:32 pm
SUX
-
DEN
Nonstop1h 53m
United Airlines
Deal found 3/10$254
This United Airlines deal was found by Cheapflights users on 3/9. 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 6/258:15 am
DEN
-
SUX
Nonstop1h 42m
United Airlines
Sun 6/2811:32 am
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 3/9$282
This United Airlines deal was found by Cheapflights users on 3/9. 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 7/315:30 am
COS
-
SUX
1 stop4h 27m
United Airlines
Sun 8/26:30 pm
SUX
-
COS
1 stop4h 36m
United Airlines
Deal found 3/9$294
This United Airlines deal was found by Cheapflights users on 3/9. 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 3/248:05 am
DEN
-
SUX
Nonstop1h 40m
United Airlines
Sat 3/286:10 am
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 3/9$310
This United Airlines deal was found by Cheapflights users on 3/12. 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 7/99:05 pm
DEN
-
SUX
Nonstop1h 36m
United Airlines
Sat 7/1811:32 am
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 3/12$312
This United Airlines deal was found by Cheapflights users on 3/9. 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 7/168:15 am
DEN
-
SUX
Nonstop1h 42m
United Airlines
Sun 7/1911:32 am
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 3/9$330
This United Airlines deal was found by Cheapflights users on 3/13. 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 3/288:05 am
DEN
-
SUX
Nonstop1h 40m
United Airlines
Wed 4/16:00 am
SUX
-
DEN
Nonstop1h 53m
United Airlines
Deal found 3/13$346
This United Airlines deal was found by Cheapflights users on 3/12. 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 7/38:15 am
DEN
-
SUX
Nonstop1h 42m
United Airlines
Sun 7/56:30 pm
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 3/12$350
This United Airlines deal was found by Cheapflights users on 3/13. 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 7/28:15 am
DEN
-
SUX
Nonstop1h 42m
United Airlines
Sun 7/56:30 pm
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 3/13$360
This United Airlines deal was found by Cheapflights users on 3/9. 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 4/76:00 am
COS
-
SUX
1 stop3h 46m
United Airlines
Sat 4/116:00 am
SUX
-
COS
1 stop6h 05m
United Airlines
Deal found 3/9$376
This United Airlines deal was found by Cheapflights users on 3/9. 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 3/179:04 pm
DEN
-
SUX
Nonstop1h 37m
United Airlines
Thu 3/196:10 am
SUX
-
DEN
Nonstop1h 54m
United Airlines
Deal found 3/9$387

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 March 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$214
(United Airlines)

One-way from

$153
(United Airlines)

Popular in

February

Cheapest in

March

Average price

$249

Good round-trip deal

$214 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
High demand for flights, 2% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip 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 March 13, 2026.
Use the filters below to find and compare flights from Colorado to Sioux City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 4/10

8:05 am-10:46 am

Nonstop1h 41m

Sioux City Sioux Gateway

Sun 4/12

6:32 pm-7:25 pm

Nonstop1h 53m

$214

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 4/24

8:05 am-10:46 am

Nonstop1h 41m

Sioux City Sioux Gateway

Sun 4/26

6:32 pm-7:25 pm

Nonstop1h 53m

$254

Colorado SpringsSioux City

COS - SUX

COSSUX

Colorado Springs

Fri 7/31

5:30 am-10:57 am

1 stop4h 27m

Sioux City Sioux Gateway

Sun 8/2

6:30 pm-10:06 pm

1 stop4h 36m

$294

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Thu 7/16

8:15 am-10:57 am

Nonstop1h 42m

Sioux City Sioux Gateway

Sun 7/19

11:32 am-12:26 pm

Nonstop1h 54m

$330
Quickest round-trip

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Sat 3/28

8:05 am-10:45 am

Nonstop1h 40m

Sioux City Sioux Gateway

Wed 4/1

6:00 am-6:53 am

Nonstop1h 53m

$346

Colorado SpringsSioux City

COS - SUX

COSSUX

Colorado Springs

Tue 4/7

6:00 am-10:46 am

1 stop3h 46m

Sioux City Sioux Gateway

Sat 4/11

6:00 am-11:05 am

1 stop6h 05m

$376

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Wed 7/8

9:05 pm-5:54 pm

1 stop19h 49m

Sioux City Sioux Gateway

Fri 7/17

6:30 pm-7:24 pm

Nonstop1h 54m

$427
Cheapest one-way

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Fri 5/15

8:00 am-10:41 am

Nonstop1h 41m

$153

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Sun 7/19

8:15 am-10:57 am

Nonstop1h 42m

$153

DenverSioux City

DEN - SUX

DENSUX

Denver Intl

Mon 5/11

8:00 am-10:41 am

Nonstop1h 41m

$153

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 16 resultsSorted by cheapest first
1
2

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, February is the cheapest month in which you can book a flight from Colorado to Sioux City (average of $58). Flying from Colorado to Sioux City in September is currently the most expensive (average of $84). 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 March 13, 2026.

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 28% 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 March 13, 2026.

The most flights from USCO to SUX are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 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 41m. 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 $254 for a flight from Colorado to Sioux City. The cheapest flight overall is $214 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, February is the cheapest month in which you can book a flight from Colorado to Sioux City (average of $58). Flying from Colorado to Sioux City in September is currently the most expensive (average of $84). 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 March 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$214Average$339FlexibilityNo cancel feeOn-time69%

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