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Cheap flights from Sioux City to Denver from $158

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Sioux City to Denver departing on 1/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Sioux City to Denver

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 am - 6:54 am
SUX
-
DEN
1h 54mnonstop
United Airlines Logo
8:05 am - 10:45 am
DEN
-
SUX
1h 40mnonstop
$214United Airlines
Mon, Feb 16 - Sun, Feb 22
United Airlines Logo
6:43 pm - 7:40 pm
SUX
-
DEN
1h 57mnonstop
United Airlines Logo
9:00 pm - 11:47 pm
DEN
-
SUX
1h 47mnonstop
$254United Airlines
Sat, Feb 7 - Wed, Feb 11
United Airlines Logo
6:00 am - 6:54 am
SUX
-
DEN
1h 54mnonstop
United Airlines Logo
8:05 am - 10:45 am
DEN
-
SUX
1h 40mnonstop
$262United Airlines
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
6:43 pm - 7:40 pm
SUX
-
DEN
1h 57mnonstop
United Airlines Logo
9:00 pm - 11:47 pm
DEN
-
SUX
1h 47mnonstop
$310United Airlines
Thu, Jan 22 - Mon, Jan 26
United Airlines Logo
6:43 pm - 7:40 pm
SUX
-
DEN
1h 57mnonstop
United Airlines Logo
5:42 pm - 5:41 pm
DEN
-
SUX
22h 59m1 stop
$350United Airlines
Sat, Feb 7 - Wed, Feb 11
United Airlines Logo
1:00 pm - 2:55 pm
SUX
-
DEN
26h 55m2 stops
United Airlines Logo
8:05 am - 10:45 am
DEN
-
SUX
1h 40mnonstop
$362United Airlines
Mon, Feb 16 - Sun, Mar 1
United Airlines Logo
1:00 pm - 3:57 pm
SUX
-
DEN
27h 57m1 stop
United Airlines Logo
8:05 am - 10:45 am
DEN
-
SUX
1h 40mnonstop
$368United Airlines
Fri, Feb 13 - Tue, Feb 17
United Airlines Logo
6:46 pm - 7:40 pm
SUX
-
DEN
1h 54mnonstop
United Airlines Logo
6:00 am - 5:41 pm
DEN
-
SUX
10h 41m1 stop
$377United Airlines
Thu, Feb 26 - Sun, Mar 1
United Airlines Logo
6:43 pm - 7:40 pm
SUX
-
DEN
1h 57mnonstop
United Airlines Logo
6:10 pm - 5:41 pm
DEN
-
SUX
22h 31m2 stops
$387United Airlines
Sat, Feb 7 - Wed, Feb 11
United Airlines Logo
6:00 am - 6:57 am
SUX
-
DEN
1h 57mnonstop
United Airlines Logo
3:20 pm - 5:32 pm
DEN
-
SUX
25h 12m1 stop
$391United Airlines
Wed, May 6 - Sat, May 9

United Airlines flights from Sioux City to Denver

Our best United Airlines deals on Sioux City to Denver flight tickets
United Airlines
Feb 16
SUX6:00 amSioux City Sioux Gateway
1h 54m
DEN6:54 amDenver Intl
Mar 1
DEN8:05 amDenver Intl
1h 40m
SUX10:45 amSioux City Sioux Gateway
$214
United Airlines
Feb 7
SUX6:43 pmSioux City Sioux Gateway
1h 57m
DEN7:40 pmDenver Intl
Feb 11
DEN9:00 pmDenver Intl
1h 47m
SUX11:47 pmSioux City Sioux Gateway
$254
United Airlines
Feb 19
SUX6:00 amSioux City Sioux Gateway
1h 54m
DEN6:54 amDenver Intl
Mar 1
DEN8:05 amDenver Intl
1h 40m
SUX10:45 amSioux City Sioux Gateway
$262

momondo Fare Finder

 
Customize your flight search to find flights from Sioux City to Denver 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, momondo users made 832,500 searches. Data last updated January 8, 2026.
Use the filters below to find and compare flights from Sioux City to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Mon 2/16

6:00 am-6:54 am

Nonstop1h 54m

Denver Intl

Sun 2/22

8:05 am-10:45 am

Nonstop1h 40m

$214

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Sat 2/7

6:43 pm-7:40 pm

Nonstop1h 57m

Denver Intl

Wed 2/11

9:00 pm-11:47 pm

Nonstop1h 47m

$254

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Thu 2/19

6:00 am-6:54 am

Nonstop1h 54m

Denver Intl

Mon 2/23

8:05 am-10:45 am

Nonstop1h 40m

$262

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Thu 1/22

6:43 pm-7:40 pm

Nonstop1h 57m

Denver Intl

Mon 1/26

9:00 pm-11:47 pm

Nonstop1h 47m

$310

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Sat 2/7

6:43 pm-7:40 pm

Nonstop1h 57m

Denver Intl

Wed 2/11

5:42 pm-5:41 pm

1 stop22h 59m

$350

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Mon 2/16

1:00 pm-2:55 pm

2 stops26h 55m

Denver Intl

Sun 3/1

8:05 am-10:45 am

Nonstop1h 40m

$362

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Fri 2/13

1:00 pm-3:57 pm

1 stop27h 57m

Denver Intl

Tue 2/17

8:05 am-10:45 am

Nonstop1h 40m

$368

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Thu 2/26

6:46 pm-7:40 pm

Nonstop1h 54m

Denver Intl

Sun 3/1

6:00 am-5:41 pm

1 stop10h 41m

$377

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Sat 2/7

6:43 pm-7:40 pm

Nonstop1h 57m

Denver Intl

Wed 2/11

6:10 pm-5:41 pm

2 stops22h 31m

$387

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Wed 5/6

6:00 am-6:57 am

Nonstop1h 57m

Denver Intl

Sat 5/9

3:20 pm-5:32 pm

1 stop25h 12m

$391

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Denver from

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

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

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Sioux City is in March. Flight prices, which tend to average around $214, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in March, then you should wait until November to fly from Sioux City, when ticket prices are also cheap, with an average price of $214.

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

The cheapest day to depart on your flight to Denver is on a Thursday when prices can be found for as low as $355. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Denver is Sunday, with ticket prices averaging around $593.

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

The cheapest time of day to fly to Denver is in the evening when flights can be purchased for as low as $160. Flights in the morning are often more expensive with an average ticket price of $388.

What is the cheapest Sioux City Sioux Gateway to Denver Intl flight route?

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

What cabin class options are available on Sioux City Sioux Gateway to Denver Intl flights?

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

When to book flights from Sioux City to Denver

Are you open to changing your travel dates? Check out the ideal times to fly from Sioux City to Denver according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Sioux City to Denver (SUX to DEN) flight deals and tips

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

Best Price Found

$205

Fastest flight time

1h 53m

Direct flights

Tue, Thu, Fri and Sun

Airports in Denver

1 airport
The best one-way flight to Denver from Sioux City in the past 72 hours is $205. The best round-trip flight deal from Sioux City to Denver found on momondo in the last 72 hours is $273.
The fastest flight from Sioux City to Denver takes 1h 53m
Direct flights go from Sioux City to Denver on Tuesday, Thursday, Friday and Sunday. There are no airlines offering direct flights.
There is 1 airport in Denver. From Sioux City there are direct flights to Denver Intl (DEN).
Search flight deals

  • How far is Sioux City Sioux Gateway to Denver Intl by plane?

    The distance between Sioux City Sioux Gateway and Denver Intl is about 485.2 mi. In terms of flight time, this usually takes a little over 1h 53m.

  • When did momondo last update prices for flights from Sioux City Sioux Gateway Airport to Denver Intl Airport?

    Prices for flights from Sioux City Sioux Gateway Airport to Denver Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Sioux City Sioux Gateway Airport to Denver Intl Airport?

  • How old do you have to be to fly from Sioux City Sioux Gateway Airport to Denver Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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 Denver Intl Airport.

  • What documentation or ID do you need to fly to Denver Intl Airport?

    The travel and health documents you'll need for your trip to Denver Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Denver Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Sioux City to Denver?

  • What is the most popular airline from Sioux City to Denver?

Best airlines flying from Sioux City to Denver

Compare and see reviews for airlines that fly from Sioux City to Denver with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $205Free CancellationRating
7.4
9,139 reviews
Search United Airlines flights

  • United Airlines Flights From Sioux City to Denver

    United Airlines is one of the most popular airlines flying from Sioux City to Denver, operating 12 flights/week on average for this route. A good United Airlines flight deal for Sioux City to Denver starts from $205 round-trip, up to an average price of $262. Our users have rated United Airlines at 7.4/10.

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Breckenridge
Estes Park
Black Hawk
Aurora
Fort Collins
Manitou Springs
Cripple Creek
Keystone
Longmont
Boulder
Greeley
Lakewood
Thornton
Westminster
Winter Park
Frisco
Copper Mountain
Centennial
Grand Lake
Englewood

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Sioux City to Denver for you.

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

All flight searches from Sioux City to Denver on momondo can be filtered to show those which offer flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Denver from Sioux City. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

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

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