$215+ Cheap flights from Denver (DEN) to Sun Valley, ID
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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BOI
Sep 19 — Sep 261
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Best
Last-minute
One-way
Cheapest flights from Denver to Sun ValleyExplore the most affordable flight options available from Denver to Sun Valley. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2026.
Explore the most affordable flight options available from Denver to Sun Valley. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 20, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/243:04 pm -
1 stop18h 42m
Mon 9/2810:28 am -
1 stop6h 15m
Deal found 8/18![Alaska Airlines logo]()
$419
This Expedia deal was found by Cheapflights users on 8/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:08 pm -
1 stop14h 38m
Sat 9/2610:28 am -
1 stop7h 42m
Deal found 8/19![Alaska Airlines logo]()
$424
This Alaska Airlines deal was found by Cheapflights users on 8/18. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:00 am -
1 stop27h 51m
Tue 11/1711:33 am -
1 stop6h 06m
Deal found 8/18![Alaska Airlines logo]()
$466
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Sat 9/1911:30 am -
Nonstop2h 03m
Sat 9/267:05 am -
Nonstop2h 02m
Deal found 8/19![United Airlines logo]()
$479
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Wed 9/211:45 am -
Nonstop2h 03m
Sun 9/67:00 am -
Nonstop2h 02m
Deal found 8/18![United Airlines logo]()
$489
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Thu 10/17:23 pm -
Nonstop2h 02m
Sun 10/43:19 pm -
1 stop5h 54m
Deal found 8/19![United Airlines logo]()
$517
Best flights from Denver to Sun ValleyDiscover carefully curated flight deals from Denver to Sun Valley that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
Discover carefully curated flight deals from Denver to Sun Valley that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 20, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:41 pm -
1 stop16h 05m
Mon 9/2810:28 am -
1 stop6h 15m
Deal found 8/15![Alaska Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Thu 10/227:23 pm -
Nonstop2h 02m
Sun 10/257:05 am -
Nonstop1h 56m
Deal found 8/17![United Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 8/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:20 am -
1 stop4h 00m
Sun 10/257:20 am -
1 stop4h 36m
Deal found 8/17![Delta logo]()
$499
This Alaska Airlines deal was found by Cheapflights users on 8/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:33 am -
2 stops27h 18m
Tue 11/1711:33 am -
1 stop6h 06m
Deal found 8/19![Alaska Airlines logo]()
$486
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Wed 9/211:45 am -
Nonstop2h 03m
Sun 9/67:00 am -
Nonstop2h 02m
Deal found 8/18![United Airlines logo]()
$489
This Delta deal was found by Cheapflights users on 8/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/303:40 pm -
1 stop6h 22m
Sat 2/61:20 pm -
1 stop5h 50m
Deal found 8/15![Delta logo]()
$499
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Fri 9/257:23 pm -
Nonstop2h 02m
Sun 9/277:00 am -
Nonstop2h 02m
Deal found 8/19![United Airlines logo]()
$530
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Thu 10/17:23 pm -
Nonstop2h 02m
Sun 10/47:00 am -
Nonstop2h 02m
Deal found 8/19![United Airlines logo]()
$530
Last-minute flights from Denver to Sun ValleyDiscover last-minute flight deals from Denver to Sun Valley. Data last updated August 20, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Sun Valley. Data last updated August 20, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Wed 9/211:45 am -
Nonstop2h 03m
Sun 9/67:00 am -
Nonstop2h 02m
Deal found 8/18![United Airlines logo]()
$489
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Fri 9/1111:30 am -
Nonstop2h 03m
Sun 9/137:00 am -
Nonstop2h 02m
Deal found 8/16![United Airlines logo]()
$531
This Expedia deal was found by Cheapflights users on 8/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:08 pm -
1 stop14h 38m
Sat 9/2610:28 am -
1 stop7h 42m
Deal found 8/19![Alaska Airlines logo]()
$424
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Sat 9/1911:30 am -
Nonstop2h 03m
Sat 9/267:05 am -
Nonstop2h 02m
Deal found 8/19![United Airlines logo]()
$479
This Alaska Airlines deal was found by Cheapflights users on 8/17. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/243:04 pm -
1 stop18h 42m
Mon 9/2810:28 am -
1 stop6h 15m
Deal found 8/17![Alaska Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Thu 9/247:23 pm -
Nonstop2h 02m
Sun 9/277:00 am -
Nonstop2h 02m
Deal found 8/19![United Airlines logo]()
$530
One-way flights from Denver to Sun ValleySearch for one-way flight options from Denver to Sun Valley. Find affordable one-way fares based on user searches. Data last updated August 20, 2026.
Search for one-way flight options from Denver to Sun Valley. Find affordable one-way fares based on user searches. Data last updated August 20, 2026.
This Expedia deal was found by Cheapflights users on 8/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/113:04 pm -
1 stop18h 42m
Deal found 8/16![Alaska Airlines logo]()
$215
This Expedia deal was found by Cheapflights users on 8/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:34 pm -
1 stop16h 05m
Deal found 8/18![Alaska Airlines logo]()
$275
This Gotogate deal was found by Cheapflights users on 8/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:08 am -
2 stops25h 38m
Deal found 8/15![Alaska Airlines logo]()
$293
This Expedia deal was found by Cheapflights users on 8/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/45:34 pm -
1 stop16h 05m
Deal found 8/18![Alaska Airlines logo]()
$341
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Fri 9/1111:30 am -
Nonstop2h 03m
Deal found 8/16![United Airlines logo]()
$359
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Fri 9/411:45 am -
Nonstop2h 03m
Deal found 8/18![United Airlines logo]()
$439
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Fri 8/2811:45 am -
Nonstop2h 03m
Deal found 8/18![United Airlines logo]()
$539
This Booking.com deal was found by Cheapflights users on 8/19. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2912:05 pm -
2 stops21h 34m
Deal found 8/19![Alaska Airlines logo]()
$569
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:00 am -
3 stops26h 46m
Deal found 8/16![Multiple Airlines logo]()
$647
Find flight deals from Denver to Sun Valley
Keep the following information in mind while searching for Denver to Sun Valley flight deals. Data was last updated August 20, 2026.
Round-trip from | $419 (Alaska Airlines) |
|---|---|
One-way from | $215 (Expedia) |
Popular in | January |
Cheapest in | November |
Average price | $379 |
Cheapflights Fare Finder
Customize your flight search to find flights from Denver to Sun Valley 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 7,457,451 searches. Data last updated August 20, 2026.
Use the filters below to find and compare flights from Denver to Sun Valley that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DenverHailey
DEN Denver Intl - SUN Hailey Sun Valley-Friedman
DENSUN
Denver Intl
Thu 9/24
5:41 pm-9:46 am
1 stop16h 05m
Hailey Sun Valley-Friedman
Mon 9/28
10:28 am-4:43 pm
1 stop6h 15m
$419
Quickest round-trip
DenverHailey
DEN Denver Intl - SUN Hailey Sun Valley-Friedman
DENSUN
Denver Intl
Thu 10/22
7:23 pm-9:25 pm
Nonstop2h 02m
Hailey Sun Valley-Friedman
Sun 10/25
7:05 am-9:01 am
Nonstop1h 56m
$479
DenverHailey
DEN Denver Intl - SUN Hailey Sun Valley-Friedman
DENSUN
Denver Intl
Sat 11/14
7:33 am-10:51 am
2 stops27h 18m
Hailey Sun Valley-Friedman
Tue 11/17
11:33 am-5:39 pm
1 stop6h 06m
$486
DenverHailey
DEN Denver Intl - SUN Hailey Sun Valley-Friedman
DENSUN
Denver Intl
Wed 9/2
11:45 am-1:48 pm
Nonstop2h 03m
Hailey Sun Valley-Friedman
Sun 9/6
7:00 am-9:02 am
Nonstop2h 02m
$489
DenverHailey
DEN Denver Intl - SUN Hailey Sun Valley-Friedman
DENSUN
Denver Intl
Thu 10/22
8:20 am-12:20 pm
1 stop4h 00m
Hailey Sun Valley-Friedman
Sun 10/25
7:20 am-11:56 am
1 stop4h 36m
$499
DenverHailey
DEN Denver Intl - SUN Hailey Sun Valley-Friedman
DENSUN
Denver Intl
Sat 1/30
3:40 pm-10:02 pm
1 stop6h 22m
Hailey Sun Valley-Friedman
Sat 2/6
1:20 pm-7:10 pm
1 stop5h 50m
$499
DenverHailey
DEN Denver Intl - SUN Hailey Sun Valley-Friedman
DENSUN
Denver Intl
Fri 9/25
7:23 pm-9:25 pm
Nonstop2h 02m
Hailey Sun Valley-Friedman
Sun 9/27
7:00 am-9:02 am
Nonstop2h 02m
$530
DenverHailey
DEN Denver Intl - SUN Hailey Sun Valley-Friedman
DENSUN
Denver Intl
Thu 10/1
7:23 pm-9:25 pm
Nonstop2h 02m
Hailey Sun Valley-Friedman
Sun 10/4
7:00 am-9:02 am
Nonstop2h 02m
$530
Cheapest one-way
DenverHailey
DEN Denver Intl - SUN Hailey Sun Valley-Friedman
DENSUN
Denver Intl
Mon 9/14
7:30 pm-9:46 am
1 stop14h 16m
$215
DenverHailey
DEN Denver Intl - SUN Hailey Sun Valley-Friedman
DENSUN
Denver Intl
Fri 9/11
3:04 pm-9:46 am
1 stop18h 42m
$215
Showing 1-10 of 18 resultsSorted by cheapest first
Best time to book a flight from Denver to Sun Valley
Have a flexible travel schedule? Discover the best time to fly to Sun Valley from Denver with our price prediction graph.
DEN-SUN
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 Denver to Sun Valley
DEN-SV9
DEN-SUN
What is the cheapest time of day to fly from DEN to SV9?
Find hourly flight availability from Denver to Sun Valley. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2026.
It’s optimal to fly from Denver to Sun Valley in the afternoon. By choosing this option you can save up to 7% on the cost of your flight, compared to a flight in the evening.
Weekly flight availability from Denver to Sun Valley
Explore weekly flight availability from Denver to Sun Valley. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 20, 2026.
The most flights from DEN to SV9 are scheduled on a Monday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).
How much does it cost to fly round-trip from Denver to Sun Valley?
Airfare is below average for this route at the moment.
Denver to Sun Valley flights typically cost between $442 and $548 in September.The cheapest round-trip price found within the last 5 days was $419 on Alaska Airlines (Sep 24-Sep 28).
What is the cheapest day to fly from Denver to Sun Valley?
Use this chart to determine the cheapest time to fly round-trip from Denver to Sun Valley. Price data was last updated on August 15, 2026.
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
Get insights into the airlines that provide service to Sun Valley. 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 Sun Valley. Reviews last updated August 20, 2026.
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.
Overall
7.4
Crew
8.1
Entertainment
7.1
Comfort
7.3
Boarding
7.7
Food
6.7
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Overall
7.4
Crew
8.1
Entertainment
7.1
Comfort
7.3
Boarding
7.7
Food
6.7
Reviews
1 / 20
10.0
ExcellentMichelle,Dec 2025
DEN - MKE
Related info for your journey
Find useful and relevant information for your journey from Denver to Sun Valley. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Denver to Sun Valley
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Complete your trip
Complete your trip to Sun Valley by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Denver to Sun Valley by cabin class
Find flights from Denver to Sun Valley, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Denver and Sun Valley flights
Browse other Denver and Sun Valley flight options. Last updated on August 20, 2026.
Other flights from Denver
Browse through other flights departing from Denver. Flights are based on user searches made on Cheapflights and were last updated on August 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Denver to Sun Valley flights
Consider these flights traveling from Denver to Sun Valley.
Top 4 airlines flying from Denver to Sun Valley
Discover the top 4 airlines that operate flights from Denver to Sun Valley. 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 7,457,451 searches. Data last updated August 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$54 | Average$135 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$68 | Average$209 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$177 | Average$397 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$189 | Average$333 | FlexibilityNo cancel fee | On-time63% |