What airlines fly to Colorado?

United Airlines, Frontier and Southwest are the top three most popular airlines that fly to Colorado from Sioux City according to our data. United Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 3 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Sioux City Sioux Gateway to Colorado?

United Airlines is the most popular carrier operating from Sioux City Sioux Gateway to Colorado

How many flights depart from Sioux City to Colorado on average per day?

As of June 2026, there are 1 flights per day flying from Sioux City to Colorado. The most common time of day flights depart is 11:00AM, with 63% of flights taking off at noon.

How many flights depart from Sioux City to Colorado on average per week?

The number of flights available between Sioux City and Colorado is 11 per week as of June 2026. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.

When did momondo last update prices for flights from Sioux City Sioux Gateway Airport to Colorado?

Prices for flights from Sioux City Sioux Gateway Airport to Colorado are updated daily.

How many operators does momondo search for flights from Sioux City Sioux Gateway Airport to Colorado?

The number of operators available for flights from Sioux City Sioux Gateway Airport to Colorado is 1 as of June 2026.

How old do you have to be to fly from Sioux City Sioux Gateway Airport to Colorado?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sioux City Sioux Gateway Airport to Colorado.

What documentation or ID do you need to fly to Colorado?

The required travel and health documents for your Colorado trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Colorado. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$168 Cheap Flights from Sioux City to Colorado in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Sioux City to Colorado

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:32 am - 12:26 pm

SUX

DEN

1h 54mnonstop

8:15 am - 10:57 am

DEN

SUX

1h 42mnonstop

$234United Airlines

Thu, Jul 9 - Sun, Jul 19

11:32 am - 12:26 pm

SUX

DEN

1h 54mnonstop

8:15 am - 10:57 am

DEN

SUX

1h 42mnonstop

$247United Airlines

Wed, Jul 1 - Tue, Jul 7

6:43 pm - 7:37 pm

SUX

DEN

1h 54mnonstop

9:05 pm - 11:43 pm

DEN

SUX

1h 38mnonstop

$274United Airlines

Fri, Aug 21 - Mon, Aug 24

6:35 pm - 7:29 pm

SUX

DEN

1h 54mnonstop

9:05 pm - 11:41 pm

DEN

SUX

1h 36mnonstop

$282United Airlines

Fri, Jun 26 - Mon, Jun 29

11:32 am - 12:26 pm

SUX

DEN

1h 54mnonstop

9:05 pm - 11:41 pm

DEN

SUX

1h 36mnonstop

$330United Airlines

Tue, Jul 7 - Fri, Jul 10

6:43 pm - 7:37 pm

SUX

DEN

1h 54mnonstop

8:15 am - 10:55 am

DEN

SUX

1h 40mnonstop

$370United Airlines

Mon, Aug 31 - Fri, Sep 4

11:32 am - 12:26 pm

SUX

DEN

1h 54mnonstop

8:15 am - 10:57 am

DEN

SUX

1h 42mnonstop

$380United Airlines

Tue, Jun 23 - Sat, Jun 27

7:45 am - 6:39 am

SUX

DEN

23h 54m

1 stop

8:15 am - 10:55 am

DEN

SUX

1h 40mnonstop

$399United Airlines

Fri, Aug 21 - Tue, Aug 25

7:45 am - 6:39 am

SUX

DEN

23h 54m

1 stop

8:15 am - 10:55 am

DEN

SUX

1h 40mnonstop

$422United Airlines

Fri, Aug 21 - Mon, Aug 24

8:10 am - 7:42 am

SUX

DEN

24h 32m

1 stop

9:05 pm - 11:41 pm

DEN

SUX

1h 36mnonstop

$426United Airlines

Mon, Jul 13 - Mon, Jul 20

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United Airlines flights from Sioux City to Colorado

Our best United Airlines deals on Sioux City to Colorado flight tickets

United Airlines

Jul 2

SUX6:35 pmSioux City Sioux Gateway

1h 54m

DEN7:29 pmDenver Intl

Jul 5

DEN9:05 pmDenver Intl

1h 36m

SUX11:41 pmSioux City Sioux Gateway

$234

United Airlines

Aug 21

SUX6:43 pmSioux City Sioux Gateway

1h 54m

DEN7:37 pmDenver Intl

Aug 25

DEN8:15 amDenver Intl

1h 40m

SUX10:55 amSioux City Sioux Gateway

$274

United Airlines

Jun 26

SUX6:35 pmSioux City Sioux Gateway

1h 54m

DEN7:29 pmDenver Intl

Jun 29

DEN9:05 pmDenver Intl

1h 36m

SUX11:41 pmSioux City Sioux Gateway

$282

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Thu 7/9

11:32 am-12:26 pm

Nonstop1h 54m

Denver Intl

Sun 7/19

8:15 am-10:57 am

Nonstop1h 42m

$234

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Wed 7/1

11:32 am-12:26 pm

Nonstop1h 54m

Denver Intl

Tue 7/7

8:15 am-10:57 am

Nonstop1h 42m

$247

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Fri 8/21

6:43 pm-7:37 pm

Nonstop1h 54m

Denver Intl

Mon 8/24

9:05 pm-11:43 pm

Nonstop1h 38m

$274

Quickest round-trip

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Fri 6/26

6:35 pm-7:29 pm

Nonstop1h 54m

Denver Intl

Mon 6/29

9:05 pm-11:41 pm

Nonstop1h 36m

$282

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Tue 7/7

11:32 am-12:26 pm

Nonstop1h 54m

Denver Intl

Fri 7/10

9:05 pm-11:41 pm

Nonstop1h 36m

$330

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Mon 8/31

6:43 pm-7:37 pm

Nonstop1h 54m

Denver Intl

Fri 9/4

8:15 am-10:55 am

Nonstop1h 40m

$370

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Tue 6/23

11:32 am-12:26 pm

Nonstop1h 54m

Denver Intl

Sat 6/27

8:15 am-10:57 am

Nonstop1h 42m

$380

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Fri 8/21

7:45 am-6:39 am

1 stop23h 54m

Denver Intl

Tue 8/25

8:15 am-10:55 am

Nonstop1h 40m

$399

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Fri 8/21

7:45 am-6:39 am

1 stop23h 54m

Denver Intl

Mon 8/24

8:15 am-10:55 am

Nonstop1h 40m

$422

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Mon 7/13

8:10 am-7:42 am

1 stop24h 32m

Denver Intl

Mon 7/20

9:05 pm-11:41 pm

Nonstop1h 36m

$426

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Sioux City to Colorado

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Colorado?

The month of August is, on average, the cheapest month to fly to Colorado from Sioux City, with most prices found around $171. The month of December is another great option to travel to Colorado, with average flight prices from Sioux City averaging around $214.

What is the cheapest day to depart on your flight to Colorado?

The cheapest day to depart from Sioux City to Colorado is on a Wednesday when prices can be found for as low as $340. On the other hand, Monday is the most expensive day to depart from Sioux City because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $850.

What is the cheapest time of day to depart on your flight to Colorado?

The cheapest time of day to fly to Colorado is in the evening when flights can be purchased for as low as $160. In the morning is when there is more demand to fly to Colorado, so prices are often more expensive at around $480 per ticket.

What is the cheapest Sioux City Sioux Gateway to Colorado flight route?

Fly from Sioux City Sioux Gateway to Denver Intl for the best Sioux City Sioux Gateway - Colorado flight prices

What cabin class options are available on Sioux City to Colorado flights?

There are 2 cabin classes available to choose from on Sioux City to Colorado flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Sioux City to Colorado flights?

You could potentially save up to 11% on your flight if you consider stops on a Sioux City to Colorado flight.

Cheap Sioux City to Colorado flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Sioux City to Colorado

Best Price Found	$267
Fastest flight time	1h 54m
Direct flights	Tue, Wed, Fri and Sat
Airports in Colorado	87 airports

The best one-way flight to Colorado from Sioux City in the past 72 hours is $267. The best round-trip flight deal from Sioux City to Colorado found on momondo in the last 72 hours is $328.

The fastest flight from Sioux City to Colorado takes 1h 54m

Direct flights go from Sioux City to Colorado on Tuesday, Wednesday, Friday and Saturday. There are no airlines offering direct flights.

There are 87 airports in Colorado. From Sioux City there are direct flights to Denver Intl (DEN).

Search flight deals

Frequently asked questions about flying from Sioux City to Colorado

When did momondo last update prices for flights from Sioux City Sioux Gateway Airport to Colorado?
Prices for flights from Sioux City Sioux Gateway Airport to Colorado are updated daily.
How many operators does momondo search for flights from Sioux City Sioux Gateway Airport to Colorado?
The number of operators available for flights from Sioux City Sioux Gateway Airport to Colorado is 1 as of June 2026.
How old do you have to be to fly from Sioux City Sioux Gateway Airport to Colorado?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Sioux City Sioux Gateway Airport to Colorado.
What documentation or ID do you need to fly to Colorado?
The required travel and health documents for your Colorado trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Colorado. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Sioux City to Colorado?
Based on momondo bookings for flights between Sioux City and Colorado, the leading plane model is Canadair (Bombardier) Regional Jet, making up 63.27% of the total bookings. Other popular models include Boeing 737 MAX 8 with 4.08%, Boeing 737-900 with 4.08%, and Boeing 737-900 Passenger/BBJ3 (winglets) with 4.08%.

Best airlines flying from Sioux City to Colorado

Compare and see reviews for airlines that fly from Sioux City to Colorado with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $214	Free Cancellation	Rating 7.4 9,804 reviews		Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Sioux City to Colorado?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Colorado from Sioux City.

Can I find flights from Sioux City to Colorado with flexible booking policies on momondo?

Flights from Sioux City to Colorado with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Sioux City to Colorado?

momondo helps you find the best flight between Sioux City and Colorado by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Sioux City to Colorado right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Colorado, momondo offers a useful price alert feature which will track prices for flights to Colorado from Sioux City and alert you when they change.