204 € Cheap Flights from Sioux City to Denver International

Compare Sioux City to Denver International flight deals

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Flight deals from Sioux City to Denver International

Looking for a cheap last-minute deal or the best return flight from Sioux City Airport to Denver International Airport? If you want to travel next month, return fares start from 204 €. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Sioux City to Denver International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Sioux City to Denver International flights are currently cheapest in August.

Direct flights from Sioux City to Denver International

Sioux City to Denver International: Alternative routes

Compare routes from Sioux City to Denver below. You may find an airport to fly into that's cheaper, faster, or easier than Denver International.

Sioux City to Denver: Flight information

The things to know before you go.
Cheapest flight found204 €
Cheapest month to flyAugust
Average flight time1 hr, 55 mins
Most popular airlineUnited
Average flights per week25

Finding cheap flights from Sioux City to Denver International: Frequently asked questions

The best price we found for a return flight from Sioux City to Denver International is 204 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 55 minutes is the average flight time from Sioux City to Denver International.
United and SkyWest Airlines fly direct from Sioux City to Denver International.
As of July 2026, there are 25 flights per week flying from Sioux City to Denver International.
The cheapest month to fly from Sioux City to Denver International is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Sioux City Airport to Denver International Airport on Thursday, 6 August 2026.
Yes – the average flight time is 1 hour and 55 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Denver International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Denver is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, United offers the cheapest flight tickets to Denver International.

Flying from Sioux City Airport (SUX) to Denver International Airport (DEN): what you need to know

  • Hop on a direct flight from Sioux City Airport to Denver International Airport and you'll be travelling for an average of 1 hour 55 minutes.

  • The timezone in Denver is UTC-7, which is one hour behind Sioux City.

  • Each week, there are 12 Sioux City Airport to Denver International Airport flights. If you prefer to get going as soon as possible, pick the 15:15 United Airlines flight. If you're eager to make the most of your day before flying, the last departure is at 18:50 with United Airlines.

  • Give yourself plenty of time to catch your SUX to DEN flight. A good rule of thumb is to arrive two hours before international departures and an hour ahead for domestic flights.

  • During popular months such as February, it's best to get to the airport earlier than normal. Plan to arrive two hours before domestic departures and four hours ahead of an international flight whenever you're travelling during peak periods in general.

  • United offers direct flights from Sioux City Airport to Denver International Airport. Book with this popular airline, then get ready to see the sights in Denver — and maybe even more of the United States if you have time.

  • The majority of travellers choose to fly with United on this route.

  • United is the most punctual carrier offering SUX to DEN flights, with 77.12% of its services arriving on schedule.

  • If you'd like to check out a different city along the way, search for a flight with a stopover. To see all your options for tickets from Sioux City Airport to Denver International Airport, deselect 'Direct flights only.' Chicago O'Hare International Airport is a popular stop between SUX and DEN.

How to find the cheapest flights from Sioux City Airport (SUX) to Denver International Airport (DEN)

  • 146 € is currently the best price for a one-way Sioux City Airport to Denver International Airport flight. A return flight starts from 204 €. These fares may change based on availability.

  • To find cheap tickets from SUX to DEN, book as early as you can. Airlines tend to offer lower fares when flights are first made available.

  • If you're flexible with your travel plans, try using the 'Whole month' search function. It'll show you the cheapest price across the month when searching for a flight from Sioux City Airport to Denver International Airport.

  • You don't need to check every day to see if fares have gone down when you set up a Price Alert. We'll notify you as soon as there's a better deal on cheap flights from SUX to DEN.

  • Choose your ideal arrival and departure times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to get the best deals on flights from Sioux City Airport to Denver International Airport.

Handy information about Sioux City Airport (SUX)

  • You'll find SUX at 2403 Odgen Road.

  • When it comes to Sioux City Airport's on-time performance, data shows 74% of flights arrive within the scheduled timeframe.

  • Central Sioux City to Sioux City Airport is approximately 11 kilometres. Depending on traffic, it'll take you about 15 minutes to get there if you're driving, catching a taxi or ride-sharing.

  • Planning to take public transport? You can expect a journey time of around 35 minutes.

  • Get your trip off to a relaxed start by staying near SUX. Whether you're taking an early flight from Sioux City Airport to Denver International Airport or want to avoid feeling rushed, these stays are perfect:

Arriving at Denver International Airport (DEN)

  • After your Sioux City Airport to Denver International Airport flight has arrived, kick back at a hotel close by. Baymont by Wyndham Denver International Airport is a great option that's not too far from DEN.

  • Go wherever you want, whenever you want with a Denver International Airport rental car. Pick up your wheels from Routes Car Rentals, Dollar or Budget and experience more of Denver and beyond.

  • To secure the lowest price, book your ride from Denver International Airport about one week before you set off.

Getting from Denver International Airport (DEN) to central Denver

  • DEN is located at 8500 Pena Boulevard.

  • Denver International Airport to central Denver has a drive time of about 35 minutes. It's approximately 40 kilometres away.

  • If you're using public transport, expect a journey time of roughly 35 minutes.

When to fly to Denver International Airport (DEN)

  • The quietest month for a flight from Sioux City Airport to Denver International Airport is January, while July is the most popular. Choose the best time to visit Denver based on whether you prefer a laid-back vibe or a more bustling atmosphere.

  • Book your flight from Sioux City Airport to Denver International Airport for July if you want to explore Denver during its warmest month. Expect temperatures of between 14ºC (57ºF) and 32ºC (90ºF).

  • For cooler conditions, search for a cheap ticket from SUX to DEN in January. Average temperatures are between -9ºC (16ºF) and 7ºC (45ºF) then.

Explore more of the United States

  • You've done Denver, now it's time to discover more of the United States. Journey around 105 kilometres south to Colorado Springs to tick off its top sights. From Garden of the Gods to Pikes Peak Region Attractions and Red Rock Canyon, you've got a jam-packed schedule ahead.

  • If you want to check out another side of the United States, consider Aurora, roughly 13 kilometres east of Denver. Plains Conservation Centre, DeLaney Homestead Historic District and Aircraft viewing are among the biggest draws.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.