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Cheap flights from the United Kingdom to Idaho from £317

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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
30 Dec — 6 Jan1
1 adult
1 adult, Economy, 0 bags

Find flight deals from United Kingdom to Idaho

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to Idaho
Explore the most affordable flight options available from United Kingdom to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 November 2025.

Tue 9/1211:55LHR - BOI
1 stop17h 30mAmerican Airlines
Mon 15/1213:17BOI - LHR
1 stop13h 43mAmerican Airlines
Deal found 28/11£515
Tue 9/1210:15LHR - BOI
1 stop19h 10mAmerican Airlines
Sun 14/1213:36BOI - LHR
1 stop13h 49mAmerican Airlines
Deal found 28/11£525
Tue 9/1211:55LHR - BOI
1 stop17h 30mFinnair
Mon 15/1206:44BOI - LHR
1 stop20h 16mFinnair
Deal found 29/11£665
Mon 8/1208:20LHR - BOI
1 stop21h 05mFinnair
Mon 15/1206:44BOI - LHR
1 stop20h 16mFinnair
Deal found 29/11£671
Tue 9/1208:20LHR - BOI
1 stop21h 05mFinnair
Sun 14/1206:44BOI - LHR
1 stop17h 06mFinnair
Deal found 27/11£680
Mon 8/1208:20LHR - BOI
1 stop21h 05mAmerican Airlines
Mon 15/1213:57BOI - LHR
1 stop13h 28mAmerican Airlines
Deal found 27/11£687
Tue 9/1213:45LHR - BOI
1 stop16h 59mUnited Airlines
Mon 15/1209:40BOI - LHR
1 stop17h 00mUnited Airlines
Deal found 28/11£692
Wed 24/1211:55LGW - GEG
2 stops20h 37mMultiple Airlines
Wed 7/112:10GEG - LGW
2 stops14h 45mMultiple Airlines
Deal found 28/11£707
Mon 8/1211:55LGW - BOI
2 stops16h 50mMultiple Airlines
Tue 16/1211:45BOI - LGW
2 stops16h 10mMultiple Airlines
Deal found 29/11£732
Mon 8/1211:55LGW - BOI
2 stops16h 50mMultiple Airlines
Mon 15/1211:45BOI - LGW
2 stops16h 10mMultiple Airlines
Deal found 29/11£769
Wed 24/1208:40LHR - GEG
2 stops22h 36mDelta
Wed 7/106:05GEG - LHR
1 stop20h 25mDelta
Deal found 28/11£777
Thu 11/1212:30LGW - BOI
2 stops30h 57mAmerican Airlines
Fri 9/117:54BOI - LGW
2 stops30h 36mAmerican Airlines
Deal found 28/11£818

Cheap flight deals from United Kingdom to Idaho

Keep the following information in mind while searching for United Kingdom to Idaho flight deals. Data was last updated 30 November 2025.

Round-trip from

£469

One-way from

£317

Popular in

December

Cheapest in

September

Average price

£642
4/2-18/2
  • 4/2-18/2
  • 4 total stops
  • 39h 08m total
  • United Kingdom to Idaho
Search Deals
11/2
  • 11/2
  • 3 total stops
  • 51h 01m total
  • United Kingdom to Idaho
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£46 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom to Idaho 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 858,174 searches. Data last updated 30 November 2025.
Use the filters below to find and compare flights from the United Kingdom to Idaho that are best for you.

Fly from

United Kingdom

Fly to

Idaho

Route

Depart

Return

Price

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:03

2 stops21h 28m

Spokane

Tue 17/3

06:00-06:20

2 stops17h 20m

£508

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 20/2

06:35-23:48

2 stops24h 13m

Boise Air Term. Gowen Fld

Mon 2/3

05:00-05:55

2 stops17h 55m

£508

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 27/2

11:10-23:48

2 stops19h 38m

Boise Air Term. Gowen Fld

Mon 9/3

12:59-12:00

1 stop17h 01m

£508

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sun 1/2

06:30-19:51

2 stops20h 21m

Boise Air Term. Gowen Fld

Wed 18/2

06:25-09:40

1 stop20h 15m

£508

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sun 1/2

06:30-19:51

2 stops20h 21m

Boise Air Term. Gowen Fld

Tue 17/2

05:00-09:40

1 stop21h 40m

£508

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 3/2

07:30-18:07

2 stops17h 37m

Boise Air Term. Gowen Fld

Sun 8/2

08:15-08:25

2 stops17h 10m

£508

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/5

08:45-23:38

2 stops22h 53m

Spokane

Sun 10/5

07:02-14:10

1 stop23h 08m

£517

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 11/2

11:35-21:22

1 stop17h 47m

Spokane

Sun 15/2

05:00-05:55

2 stops16h 55m

£532

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Wed 11/2

12:30-21:13

2 stops40h 43m

Spokane

Sun 15/2

05:51-09:00

2 stops43h 09m

£569

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Tue 10/3

11:55-21:37

2 stops16h 42m

Spokane

Tue 17/3

12:00-10:55

2 stops15h 55m

£582

Flights are sorted by cheapest return flights first.

Deals found on 29/11

Showing 1-10 of 56 results
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Best time to book a flight from United Kingdom to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from United Kingdom 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 from the United Kingdom to Idaho

What is the cheapest month to book a flight from United Kingdom to Idaho?

Currently, September is the cheapest month in which you can book a flight from United Kingdom to Idaho (average of £509). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £667). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from GB to ID?

Find hourly flight availability from United Kingdom to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 November 2025.

A simple way to save on the total cost of your ticket is to fly from United Kingdom to Idaho in the evening. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated 30 November 2025.
See what other customers who have flown with KLM, Virgin Atlantic, andUnited Airlines from the United Kingdom to Idaho have to say. 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.
KLM
7.7
Good
1,424 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,424 reviews
KLM
7.7
Good
1,424 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
675 reviews
KLM
7.7
Good
1,424 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
9,055 reviews
KLM
7.7
Good
1,424 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Icelandair
7.0
Good
584 reviews
KLM
7.7
Good
1,424 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,598 reviews
KLM
7.7
Good
1,424 reviews
Check prices

Crew

8.4

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from United Kingdom to Idaho?

    Departing from United Kingdom to Idaho will take you 16h 42m. The distance between United Kingdom and Idaho is about 4667 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from United Kingdom to Idaho one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as £347. However, be on the lookout for offers from Lufthansa and WestJet, as they are both options that can get you from United Kingdom to Idaho for a low price.

  • Can I find deals for flights from United Kingdom to Idaho that include hotel bookings?

    Yes. In addition to deals on United Kingdom to Idaho flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to Idaho?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Idaho.

  • Can I find deals for business class flights from United Kingdom to Idaho?

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

  • What is the cheapest month to book a flight from United Kingdom to Idaho?

    Currently, September is the cheapest month in which you can book a flight from United Kingdom to Idaho (average of £509). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £667). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for United Kingdom to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from United Kingdom to Idaho

Discover the top 9 airlines that operate flights from United Kingdom to Idaho. 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 858,174 searches. Data last updated 30 November 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£543Average£788FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£550Average£698FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£559Average£715FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapest£608Average£835FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£611Average£948FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
British AirwaysCheapest£635Average£841FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£658Average£740FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£665Average£781FlexibilityNo cancel feeOn-time77%
Search Air France flights
KLMCheapest£695Average£815FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from United Kingdom to Idaho?

Deals for United Kingdom to Idaho flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Idaho?

Cheapflights helps you find that perfect flight to Idaho from United Kingdom by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from United Kingdom to Idaho with no change fees?

Need flexible booking options for your flight to Idaho from United Kingdom? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from United Kingdom to Idaho become cheaper?

Yes! Start tracking prices for United Kingdom to Idaho flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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