£667+ 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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
— BOI
23 May — 30 May1
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 23 April 2026.

Wed 15/710:55
LHR
-
SUN
1 stop18h 13m
Delta
Mon 3/815:19
SUN
-
LHR
2 stops14h 46m
Delta
Deal found 19/4£992
Wed 15/709:55
LHR
-
SUN
2 stops19h 13m
KLM
Mon 3/813:10
SUN
-
LHR
1 stop13h 50m
KLM
Deal found 22/4£1,037
Wed 15/709:50
LHR
-
SUN
1 stop30h 48m
Multiple Airlines
Mon 3/810:20
SUN
-
LHR
1 stop20h 25m
Multiple Airlines
Deal found 21/4£1,162
Tue 5/506:30
LHR
-
SUN
2 stops22h 12m
Virgin Atlantic
Fri 8/512:39
SUN
-
LHR
2 stops16h 31m
Virgin Atlantic
Deal found 21/4£1,418
Tue 5/510:20
LHR
-
SUN
3 stops32h 41m
Multiple Airlines
Fri 8/515:20
SUN
-
LHR
3 stops41h 40m
Multiple Airlines
Deal found 21/4£1,630

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 23 April 2026.

Return from

£992

One-way from

£667
Delta
  • Delta
  • 15/7-3/8
  • 2 total stops
  • 32h 03m total
  • London to Hailey
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 3/6
  • 1 total stop
  • 24h 14m 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 23 April 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

Wed 15/7

10:55-22:08

1 stop18h 13m

Hailey Sun Valley-Friedman

Mon 3/8

15:19-13:05

2 stops14h 46m

£992

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Wed 15/7

09:55-22:08

2 stops19h 13m

Hailey Sun Valley-Friedman

Mon 3/8

13:10-10:00

1 stop13h 50m

£1,037

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Wed 15/7

16:30-09:38

1 stop24h 08m

Hailey Sun Valley-Friedman

Mon 3/8

10:20-13:45

1 stop20h 25m

£1,189

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Tue 5/5

06:30-21:42

2 stops22h 12m

Hailey Sun Valley-Friedman

Fri 8/5

12:39-12:10

2 stops16h 31m

£1,418
Cheapest one-way

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Wed 3/6

17:00-10:14

1 stop24h 14m

£667
Fastest single journey

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Wed 3/6

07:25-21:26

2 stops21h 01m

£699

Flights are sorted by cheapest return flights first.

Deals found on 19/4

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 19 hours 13 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).

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, United Airlines 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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Users can book flights with no change fees policies with our dedicated filters. Book flights to Sun Valley flexibly with Cheapflights today.

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