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Cheap flights from Sioux City to Denver from $302

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Sioux City to Denver departing on 10/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

United Airlines Logo
6:51 pm - 7:40 pmSUX-DEN
1h 49mnonstop
United Airlines Logo
3:40 pm - 6:14 pmDEN-SUX
1h 34mnonstop
$302United Airlines
Find Deal
Fri, Oct 10 - Tue, Oct 14
United Airlines Logo
6:51 pm - 7:40 pmSUX-DEN
1h 49mnonstop
United Airlines Logo
3:40 pm - 6:14 pmDEN-SUX
1h 34mnonstop
$310United Airlines
Find Deal
Mon, Oct 6 - Thu, Oct 9
United Airlines Logo
6:54 pm - 7:51 pmSUX-DEN
1h 57mnonstop
United Airlines Logo
3:35 pm - 6:13 pmDEN-SUX
1h 38mnonstop
$312United Airlines
Find Deal
Mon, Dec 22 - Mon, Dec 29
United Airlines Logo
6:30 pm - 7:27 pmSUX-DEN
1h 57mnonstop
United Airlines Logo
8:05 am - 10:39 amDEN-SUX
1h 34mnonstop
$350United Airlines
Find Deal
Tue, Mar 3 - Sat, Mar 7
United Airlines Logo
6:51 pm - 7:40 pmSUX-DEN
1h 49mnonstop
United Airlines Logo
3:40 pm - 6:14 pmDEN-SUX
1h 34mnonstop
$360United Airlines
Find Deal
Sat, Oct 4 - Sat, Oct 11
United Airlines Logo
6:54 pm - 7:51 pmSUX-DEN
1h 57mnonstop
United Airlines Logo
3:35 pm - 6:13 pmDEN-SUX
1h 38mnonstop
$362United Airlines
Find Deal
Thu, Dec 25 - Sun, Dec 28
United Airlines Logo
6:00 am - 6:57 amSUX-DEN
1h 57mnonstop
United Airlines Logo
8:34 pm - 4:32 pmDEN-SUX
18h 58m1 stop
$391United Airlines
Find Deal
Tue, Mar 3 - Sat, Mar 7
United Airlines Logo
6:51 pm - 7:40 pmSUX-DEN
1h 49mnonstop
United Airlines Logo
8:28 pm - 11:00 pmDEN-SUX
25h 32m1 stop
$395United Airlines
Find Deal
Fri, Oct 10 - Tue, Oct 14
United Airlines Logo
12:45 pm - 10:30 amSUX-DEN
22h 45m2 stops
United Airlines Logo
8:05 am - 10:39 amDEN-SUX
1h 34mnonstop
$405United Airlines
Find Deal
Tue, Mar 3 - Sat, Mar 7
United Airlines Logo
6:51 pm - 7:40 pmSUX-DEN
1h 49mnonstop
United Airlines Logo
3:35 pm - 6:08 pmDEN-SUX
1h 33mnonstop
$410United Airlines
Find Deal
Sun, Oct 19 - Sun, Oct 26

United Airlines flights from Sioux City to Denver

Our best United Airlines deals on Sioux City to Denver flight tickets
United Airlines
Oct 10
SUX6:51 pmSioux City Sioux Gateway
1h 49m
DEN7:40 pmDenver Intl
Oct 14
DEN3:40 pmDenver Intl
1h 34m
SUX6:14 pmSioux City Sioux Gateway
$302
Find similar
United Airlines
Oct 6
SUX6:51 pmSioux City Sioux Gateway
1h 49m
DEN7:40 pmDenver Intl
Oct 9
DEN3:40 pmDenver Intl
1h 34m
SUX6:14 pmSioux City Sioux Gateway
$310
Find similar
United Airlines
Dec 22
SUX6:54 pmSioux City Sioux Gateway
1h 57m
DEN7:51 pmDenver Intl
Dec 29
DEN3:35 pmDenver Intl
1h 38m
SUX6:13 pmSioux City Sioux Gateway
$312
Find similar

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 September 23, 2025.
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

Fri 10/10

6:51 pm-7:40 pm

Nonstop1h 49m

Denver Intl

Tue 10/14

3:40 pm-6:14 pm

Nonstop1h 34m

$302

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Mon 10/6

6:51 pm-7:40 pm

Nonstop1h 49m

Denver Intl

Thu 10/9

3:40 pm-6:14 pm

Nonstop1h 34m

$310

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Mon 12/22

6:54 pm-7:51 pm

Nonstop1h 57m

Denver Intl

Mon 12/29

3:35 pm-6:13 pm

Nonstop1h 38m

$312

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Tue 3/3

6:30 pm-7:27 pm

Nonstop1h 57m

Denver Intl

Sat 3/7

8:05 am-10:39 am

Nonstop1h 34m

$350

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

$360

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Thu 12/25

6:54 pm-7:51 pm

Nonstop1h 57m

Denver Intl

Sun 12/28

3:35 pm-6:13 pm

Nonstop1h 38m

$362

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Tue 3/3

6:00 am-6:57 am

Nonstop1h 57m

Denver Intl

Sat 3/7

8:34 pm-4:32 pm

1 stop18h 58m

$391

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Fri 10/10

6:51 pm-7:40 pm

Nonstop1h 49m

Denver Intl

Tue 10/14

8:28 pm-11:00 pm

1 stop25h 32m

$395

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Tue 3/3

12:45 pm-10:30 am

2 stops22h 45m

Denver Intl

Sat 3/7

8:05 am-10:39 am

Nonstop1h 34m

$405

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Sun 10/19

6:51 pm-7:40 pm

Nonstop1h 49m

Denver Intl

Sun 10/26

3:35 pm-6:08 pm

Nonstop1h 33m

$410

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 $381. 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 $717.

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 at noon are often more expensive with an average ticket price of $564.

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 3 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

$257

Fastest flight time

1h 48m

Direct flights

Every day

Airports in Denver

1 airport
The best one-way flight to Denver from Sioux City in the past 72 hours is $257. The best round-trip flight deal from Sioux City to Denver found on momondo in the last 72 hours is $268.
The fastest flight from Sioux City to Denver takes 1h 48m
Direct flights go from Sioux City to Denver every day.
There is 1 airport near Denver: 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 48m.

  • 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 $194Free CancellationRating
7.4
8,926 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 3 flights/week on average for this route. A good United Airlines flight deal for Sioux City to Denver starts from $194 round-trip, up to an average price of $268. 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
Estes Park
Breckenridge
Black Hawk
Aurora
Fort Collins
Keystone
Cripple Creek
Boulder
Manitou Springs
Longmont
Lakewood
Greeley
Thornton
Westminster
Winter Park
Copper Mountain
Frisco
Grand Lake
Silverthorne
Central City

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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