$129 Cheap United flights Idaho Falls (IDA) to Denver (DEN)

View $129 flight on Fri, Jan 23, 2026Opens in a new window

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$129 Cheap United flights Idaho Falls (IDA) to Denver (DEN)

Prices were available within the past 7 days and start at $129 for one-way flights and $189 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Jan 23 - Mon, Jan 26
IDA
Idaho Falls
DEN
Denver
$189 Roundtrip, found 1 hour ago
$189
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Jan 23 from Idaho Falls to Denver, returning Mon, Jan 26, priced at $189 found 1 hour ago
United
Thu, Oct 30 - Sun, Nov 2
IDA
Idaho Falls
DEN
Denver
$194 Roundtrip, found 7 hours ago
$194
Roundtrip
found 7 hours ago
Select United flight, departing Thu, Oct 30 from Idaho Falls to Denver, returning Sun, Nov 2, priced at $194 found 7 hours ago
United
Thu, Sep 11 - Sun, Sep 14
IDA
Idaho Falls
DEN
Denver
$199 Roundtrip, found 5 hours ago
$199
Roundtrip
found 5 hours ago
Select United flight, departing Thu, Sep 11 from Idaho Falls to Denver, returning Sun, Sep 14, priced at $199 found 5 hours ago
United
Fri, Jan 23 - Mon, Jan 26
IDA
Idaho Falls
DEN
Denver
$219 Roundtrip, found 1 hour ago
$219
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Jan 23 from Idaho Falls to Denver, returning Mon, Jan 26, priced at $219 found 1 hour ago
United
Thu, Sep 11 - Sun, Sep 14
IDA
Idaho Falls
DEN
Denver
$224 Roundtrip, found 5 hours ago
$224
Roundtrip
found 5 hours ago
Select United flight, departing Thu, Sep 11 from Idaho Falls to Denver, returning Sun, Sep 14, priced at $224 found 5 hours ago
United
Tue, Oct 28 - Wed, Nov 12
IDA
Idaho Falls
DEN
Denver
$249 Roundtrip, just found
$249
Roundtrip
just found
Select United flight, departing Tue, Oct 28 from Idaho Falls to Denver, returning Wed, Nov 12, priced at $249 just found
Flights from Idaho Falls (IDA) to Denver (DEN)
Origin airport
Idaho Falls Regional
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Popular airline
Alaska Airlines
Distance
457 mi
Average flight time
1 hour 48 mins

Frequently asked questions

How much is a United Airlines flight from Idaho Falls Regional Airport (IDA) to Denver Intl. Airport (DEN)?
You can find budget-friendly return United Airlines flights from $189 from IDA to DEN by organizing your results from "Price (lowest to highest)" on Expedia. Or look for bargains from $129 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IDA to DEN with United Airlines?
Search for round-trip or one-way flights to Denver in January or November. You could find a cheap fare with United Airlines during these off-season months.
What is the cheapest time to book flights from Idaho Falls Regional Airport (IDA) to Denver Intl. Airport (DEN) with United Airlines?
For cheap United Airlines fares from Idaho Falls Regional Airport (IDA) to Denver Intl. Airport (DEN), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also influence the overall cost. Sunday tends to be the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Idaho Falls Regional Airport (IDA) to Denver Intl. Airport (DEN)?
United Airlines operates direct flights from Idaho Falls Regional Airport (IDA) to Denver Intl. Airport (DEN), with 28 departures every week. Just choose the "Nonstop" and "Airline" filters while searching on Expedia to see all direct United Airlines flights to DEN.
How long does it take to fly from IDA to DEN with United Airlines?
From wheels-up to touchdown, a direct United Airlines flight from Idaho Falls Regional Airport (IDA) to Denver Intl. Airport (DEN) typically takes 1h 55m.
Which day of the week has the most United Airlines flights from Idaho Falls Regional Airport (IDA) to Denver Intl. Airport (DEN)?
United Airlines has the most flights from Idaho Falls Regional Airport (IDA) to Denver Intl. Airport (DEN) on Wednesday. With up to 4 daily departures, you'll get the most options and flexibility on this day.
What is the earliest United Airlines flight from IDA to DEN?
The first flight from IDA to DEN with United Airlines leaves at 7:00AM UTC-7. You'll touch down at 8:59AM UTC-7. The last United Airlines flight of the day leaves at 5:50PM UTC-7 and arrives at 7:40PM UTC-7. With 20% fewer cancellations for morning and mid-morning departures, beginning your travel day early is usually the best choice.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Denver?
United Airlines flights from Idaho Falls Regional Airport (IDA) to Denver arrive at Denver Intl. Airport (DEN). This is the main entry point here.
Why fly with United Airlines from IDA to DEN?
Journey from IDA to DEN with United Airlines and you'll enjoy a range of perks including a rewarding loyalty program. When you book through Expedia as a United Mileage Plus and One Key™ member, you may also earn OneKeyCash™* to redeem on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Idaho Falls Regional Airport (IDA) to Denver Intl. Airport (DEN)?
You'll likely board a Bombardier CRJ700 or a Bombardier CRJ when flying United Airlines from Idaho Falls Regional Airport (IDA) to Denver Intl. Airport (DEN). However, keep in mind that a different aircraft may be assigned due to operational demands.
Can I change or cancel my United Airlines flight from Idaho Falls Regional Airport (IDA) to Denver Intl. Airport (DEN)?
Changes are typically free within 24 hours of making a booking, but your airline may charge a fee after that time. For more details about modifying your reservation, check out your "Trips," select your flight and click on "Manage Booking." If you'd like the freedom to change your itinerary without being charged, apply the "Changes included" and "No cancel fee" filters when organizing your next break.

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