Cheap Flights from Sioux City (SUX) to Denver (DEN)

You can find one-way and return flights from SUX to DEN with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when SUX to DEN ticket fares go up or down.

February is typically the cheapest month to fly from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.), with average return fares around CA$297. February often sees lower prices because it falls after the busy holiday travel season, when demand for flights tends to decrease. Other cheap months to fly from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) include July and October.

Only one airline offers direct flights from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.). United operates 22 direct flights from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) every week.

United is one of the cheapest airlines offering nonstop return flights from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.), with tickets starting from around CA$295 for flights that can be booked for departure within the next year. United also offers one of the cheapest connecting return flights on this route, with tickets starting from around CA$600. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.

To find a cheap flight from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best airline to fly with from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) will differ from traveler to traveler. If you like to fly early, United offers early morning flights. If price is the most important factor, United typically offers the lowest fares. United offers the most daily flights from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.

The cheapest months to fly from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) are typically February and July, with average return flights around CA$297. While these months offer the best value, you'll want to consider if they align with your travel plans for Denver.

You'll find approximately 3 nonstop flights per day from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.). For even more choices, look at flights that include layovers, as there are around 1 connecting flight per day. A common connection point is O'Hare Intl. (ORD).

The earliest flight from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) typically departs around 6:00 AM local time. This flight is operated by United. This is a seasonal service, active in January and February. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

You'll typically find the most flights from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) on a Thursday, with around 3 flights available. This gives you a good selection of options for your travel plans. United is a major airline on this route. Flight schedules are consistent throughout the week, so you'll find similar options on other days too.

The most popular departure times for flights from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) are in the evening, from 6pm to 9pm. United offers flights during this window. Many travelers prefer this because it allows you to finish your day before heading to the airport and arrive in Denver at a reasonable hour.

A nonstop flight from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) typically takes around 2 hours. This route covers a distance of approximately 750 kilometres. If you opt for a one-stop flight, your travel time will be longer, usually around 6 hours 20 minutes. Flights with two or more stops will take even longer, averaging about 11 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.

Select the "Business class" and "First class" filters when looking for Sioux City, IA (SUX) to Denver, CO (DEN) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.

It's easy to earn miles on a Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

If you're planning to travel to Denver from Sioux Gateway (SUX), you can fly directly into Denver Intl. (DEN) which offers international flights and connections. Some flights may connect through major hubs like O'Hare Intl. (ORD) before reaching Denver. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Securing a Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

If you booked your Sioux City, IA (SUX-Sioux Gateway) to Denver, CO (DEN-Denver Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.