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£496+ Cheap flights to Sun Valley

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 23/10. Fares are subject to change and may not be available on all flights or dates of travel.
— BOI
24 Aug — 31 Aug1
1 adult
1 adult, Economy, 0 bags

Flights to Sun Valley in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Sun Valley
Explore the most affordable flight options available to Sun Valley. Find the lowest fares based on data from user searches, with prices last updated on 25 July 2026.

Sat 31/1011:10
LHR
-
SUN
2 stops33h 43m
United Airlines
Wed 4/1114:34
SUN
-
LHR
2 stops34h 21m
United Airlines
Deal found 24/7£952

Find flight deals to Sun Valley

Find the latest flights to Sun Valley in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 25 July 2026.

Return from

£952

One-way from

£496
United Airlines
  • United Airlines
  • 31/10-4/11
  • 3 total stops
  • 49h 29m total
  • London to Hailey
Search Deals
23/10
  • 23/10
  • 2 total stops
  • 30h 06m total
  • London to Sun Valley
Search Deals

Cheapflights Fare Finder

 
Locate flights to Sun Valley that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 25 July 2026.
Use the filters below to find and compare flights to Sun Valley that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Sat 31/10

07:30-14:53

2 stops37h 23m

Hailey Sun Valley-Friedman

Wed 4/11

14:34-09:40

1 stop12h 06m

£952
Cheapest one-way
Fastest single journey

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Fri 23/10

14:10-11:06

3 stops51h 56m

£636

Flights are sorted by cheapest return flights first.

Deals found on 24/7

Sorted by cheapest first

Best time to book a flight to Sun Valley

Have a flexible travel schedule? Discover the best time to fly to Sun Valley with our price prediction graph.
Estimated return 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 to Sun Valley

How long is the flight to Sun Valley?

On average, a flight from London to Sun Valley takes 33 hours 43 minutes. Flights to Sun Valley from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

Rainfall in Sun Valley by month

Plan your trip to Sun Valley by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sun Valley ranges from 10.0 - 60.0 inches per month. January is typically the wettest month, when rainfall can reach 60.0 mm. July is typically the driest time to visit Sun Valley when rainfall is around 10.0 mm.

Temperature in Sun Valley by month

Plan your trip to Sun Valley by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sun Valley, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 18.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -7.0 C).

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 25 July 2026.
Get a feel of what it's like to fly with United Airlines to the United States by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,034 reviews
Check prices

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
United Airlines
7.4
Good
10,034 reviews
United Airlines
7.4
Good
10,034 reviews
Check prices

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this

FAQs about flying to Sun Valley

  • Can I find cheaper flights to Sun Valley if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Sun Valley on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Sun Valley?

    Based on reviews from Cheapflights users, Lufthansa is rated the highest out of the airlines that fly to Sun Valley.

  • Does Boise Air Term. Gowen Fld have car hire?

    Yes. Those touching down at Boise Air Term. Gowen Fld can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Boise Air Term. Gowen Fld?

    Yes. Boise Air Term. Gowen Fld has hotels nearby for those requiring accommodations. Layover Inn Boise Airport is the closest property to Boise Air Term. Gowen Fld (0.0 mi away from Boise Air Term. Gowen Fld).

See more FAQs

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