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£722+ Cheap flights to Sun Valley

— BOI
11 Oct — 18 Oct1
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

Sat 24/1017:00 -
1 stop25h 06m
Sat 31/1011:48 -
1 stop18h 32m
Deal found 9/9£869
Sat 24/1006:15 -
2 stops22h 56m
Sat 31/1015:19 -
1 stop12h 41m
Deal found 9/9£955
Sat 24/1006:40 -
3 stops22h 31m
Sat 31/1015:19 -
3 stops20h 21m
Deal found 9/9£5,188

Find flight deals to Sun Valley

Return from

£722
Alaska Airlines
  • Alaska Airlines
  • 14/1-18/1
  • 2 total stops
  • 44h 53m total
  • London to Hailey
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights to Sun Valley that are best for you.

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Route

Depart

Return

Price

Cheapest return flight

LondonHailey

LHR London Heathrow - SUN Hailey Sun Valley-Friedman

LHRSUN

London Heathrow

Thu 14/1

14:45-10:41

1 stop26h 56m

Hailey Sun Valley-Friedman

Mon 18/1

11:23-12:20

1 stop17h 57m

£722

LondonHailey

LHR London Heathrow - SUN Hailey Sun Valley-Friedman

LHRSUN

London Heathrow

Sat 24/10

17:00-11:06

1 stop25h 06m

Hailey Sun Valley-Friedman

Sat 31/10

11:48-12:20

1 stop18h 32m

£869

LondonHailey

LHR London Heathrow - SUN Hailey Sun Valley-Friedman

LHRSUN

London Heathrow

Thu 14/1

15:20-12:31

2 stops52h 11m

Hailey Sun Valley-Friedman

Mon 18/1

07:00-07:55

2 stops17h 55m

£923
Fastest return journey

LondonHailey

LHR London Heathrow - SUN Hailey Sun Valley-Friedman

LHRSUN

London Heathrow

Sat 24/10

06:15-22:11

2 stops22h 56m

Hailey Sun Valley-Friedman

Sat 31/10

15:19-10:00

1 stop12h 41m

£955

Flights are sorted by cheapest return flights first.

Deals found on 6/9

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

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 26 hours 44 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

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

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 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
10,201 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.7

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!
United Airlines
7.4
Good
10,201 reviews
United Airlines
7.4
Good
10,201 reviews
Check prices

Boarding

7.7

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.7

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

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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