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Sun Valley

Cheap flights from Denver (DEN) to Sun Valley, ID

DEN — BOI
Nov 9 — Nov 161
Mon 11/9
Mon 11/16
1 adult, Economy
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Popular in

December

Cheapest in

April

Average price

$530
Highest demand for flights based on searches. 26% potential increase in price ($200 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Cheapflights Insights

Everything you need to know about your flight from Denver to Sun Valley

What is the cheapest time of day to fly from DEN to SV9?

It’s optimal to fly from Denver to Sun Valley in the afternoon. By choosing this option you can save up to 9% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Denver to Sun Valley?

Travelers seeking maximum savings on their Denver to Sun Valley flight should consider departing on Thursday mornings when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Sun Valley

Read reviews from past customers who have flown United Airlines from Denver to Sun Valley. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,331 reviews

Food

6.7

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
10,331 reviews
United Airlines
7.4
Good
10,331 reviews

Food

6.7

Overall

7.4

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

  • What airport do you fly from for flights from Denver to Sun Valley?

    If you book a flight to Sun Valley from Denver, you will be flying from Denver Intl, which is the city’s only airport. Denver Intl (DEN) is located 18.5 mi from the center of Denver. There are 2 flights from Denver Intl to Sun Valley per day from 4 different airlines.

  • How popular is this Denver to Sun Valley flight route?

    The Denver Intl to Sun Valley flight path was viewed by 3 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the most reliable airlines from Denver to Sun Valley?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Denver to Sun Valley on time: Frontier (88%), SkyWest Airlines (79%), United Airlines (77%).

  • What are the cheapest flights from Denver to Sun Valley?

    Looking at all options, your cheapest flight can be booked for $98. While the most popular route (Denver Intl - Hailey Sun Valley-Friedman) can be booked for $413 on average, our data indicates $341 when flying from Denver to Sun Valley.

  • Can I find deals for flights from Denver to Sun Valley that include hotel bookings?

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

  • How can I find direct flights from Denver to Sun Valley?

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

  • Can I find deals for business class flights from Denver to Sun Valley?

    Yes. Cheapflights offers flight deals from Denver to Sun Valley by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 4 airlines flying from Denver to Sun Valley

AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$55Average$137FlexibilityNo cancel feeOn-time62%
DeltaCheapest$68Average$262FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$191Average$407FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$197Average$341FlexibilityNo cancel feeOn-time63%

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