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$110+ Cheap flights from Sioux City to Denver (SUX - DEN)

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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
SUX — DEN
Mar 30 — Apr 61
Sun 3/30
Sun 4/6
1 adult, Economy
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Cheap flight deals from Sioux City to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Sioux City (SUX) to Denver (DEN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$205
(United Airlines)

One-way from

$110
(United Airlines)

Popular in

July

Cheapest in

November

Average price

$276

Good round-trip deal

$340 or less

Good one-way deal

$325 or less
Provider with most accurate pricing for Sioux City Sioux Gateway-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Sioux City Sioux Gateway-Denver Intl flights.
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From Sioux City Sioux Gateway to Denver Intl
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One-way flight from Sioux City Sioux Gateway to Denver Intl
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Highest demand for flights based on searches. 11% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Sioux City Sioux Gateway to Denver Intl.
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Price to beat on a one-way flight from Sioux City Sioux Gateway to Denver Intl.
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Find flight deals from Sioux City to Denver

Cheapest flights from Sioux City to Denver
Explore the most affordable flight options available from Sioux City to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

This United Airlines deal was found by Cheapflights users on 3/24. 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.
Mon 6/96:35 pmSUX - DEN
Nonstop1h 45mUnited Airlines
Thu 6/122:35 pmDEN - SUX
Nonstop1h 40mUnited Airlines
Deal found 3/24$205

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated March 25, 2025.
Use the filters below to find and compare flights from Sioux City to Denver that are best for you.

Fly from

Sioux City

Fly to

Denver

Route

Depart

Return

Price

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Mon 6/9

6:35 pm-7:20 pm

Nonstop1h 45m

Denver Intl

Thu 6/12

2:35 pm-5:15 pm

Nonstop1h 40m

$205

Sioux CityDenver

SUX - DEN

SUXDEN

Sioux City Sioux Gateway

Mon 8/25

6:50 pm-7:34 pm

Nonstop1h 44m

$110

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

Compare providers for flights from Sioux City to Denver

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sioux City to Denver in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sioux City-Denver flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sioux City-Denver flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sioux City-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sioux City-Denver flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sioux City-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Sioux City to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Sioux City 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 Sioux City to Denver

What is the cheapest month to book a flight from Sioux City to Denver?

Currently, October is the cheapest month in which you can book a flight from Sioux City to Denver (average of $197). Flying from Sioux City to Denver in March is currently the most expensive (average of $278). 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 SUX to DEN?

Find hourly flight availability from Sioux City to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 25, 2025.

One of the essential ways to save on airfare from Sioux City to Denver 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 32% on airfare.

Rainfall in Denver by month

Plan your trip to Denver by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Denver ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Denver when rainfall is around 0.5 in.

Temperature in Denver by month

Plan your trip to Denver by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Denver, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated March 25, 2025.
United Airlines
7.4
Good
8,605 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,605 reviews
United Airlines
7.4
Good
8,605 reviews

Crew

8.1

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Sioux City to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Sioux City to Denver flight route?

    Flights from Sioux City Sioux Gateway to Denver Intl have been viewed 8 times in the past calendar month.

  • What is the cheapest airline to fly from Sioux City to Denver round-trip?

    Cheapflights users have booked flights from Sioux City to Denver round-trip from $205. Users have found that United Airlines is 23% cheaper than the other options available to this destination.

  • What are the cheapest flights from Sioux City to Denver?

    Looking for the cheapest flight from Sioux City to Denver? While on average our users pay $747, our data indicates the cheapest price to be $99. The most popular route (Sioux City Sioux Gateway - Denver Intl), is priced around $214.

  • Can I find deals for flights from Sioux City to Denver that include hotel bookings?

    Yes. In addition to deals on Sioux City to Denver flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sioux City to Denver?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sioux City to Denver.

  • Can I find deals for business class flights from Sioux City to Denver?

    Yes. Cheapflights offers flight deals from Sioux City to Denver 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 Sioux City to Denver?

    Currently, October is the cheapest month in which you can book a flight from Sioux City to Denver (average of $197). Flying from Sioux City to Denver in March is currently the most expensive (average of $278). 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
Westminster
Lakewood
Black Hawk
Winter Park
Broomfield
Cripple Creek
Silverthorne
Golden
Brighton
Greeley
Frisco
Wheat Ridge
Grand Lake
Idaho Springs
Central City
Copper Mountain
Longmont
Thornton
Limon
Dillon

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Alternative routes for Sioux City to Denver

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Top airline flying from Sioux City to Denver

Discover the top airline that operate flights from Sioux City to Denver. 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 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$194Average$267FlexibilityNo cancel feeOn-time69%
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