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Cheap flights from the United Kingdom to Idaho from £405

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
29 May — 5 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap 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 29 April 2026.

Wed 9/908:40
LHR
-
GEG
2 stops33h 55m
United Airlines
Sun 13/911:16
GEG
-
LHR
1 stop35h 29m
United Airlines
Deal found 24/4£656
Wed 4/1106:35
LHR
-
BOI
2 stops23h 30m
United Airlines
Sun 8/1118:55
BOI
-
LHR
2 stops28h 00m
United Airlines
Deal found 24/4£659
Wed 30/914:50
LHR
-
BOI
1 stop13h 41m
United Airlines
Sun 4/1017:44
BOI
-
LHR
1 stop32h 56m
United Airlines
Deal found 28/4£684
Wed 27/519:30
LHR
-
BOI
2 stops34h 28m
Scandinavian Airlines
Wed 3/615:23
BOI
-
LHR
2 stops41h 37m
Scandinavian Airlines
Deal found 27/4£704
Wed 27/511:40
LHR
-
BOI
1 stop19h 18m
Multiple Airlines
Wed 3/618:07
BOI
-
LHR
1 stop14h 28m
Multiple Airlines
Deal found 27/4£742
Thu 21/518:15
LHR
-
BOI
1 stop35h 43m
Multiple Airlines
Thu 4/608:38
BOI
-
LHR
2 stops22h 22m
Multiple Airlines
Deal found 25/4£756
Tue 9/617:00
LHR
-
BOI
1 stop13h 58m
Alaska Airlines
Tue 16/618:13
BOI
-
LHR
1 stop13h 52m
Alaska Airlines
Deal found 25/4£770
Wed 16/1206:35
LHR
-
GEG
2 stops25h 03m
Lufthansa
Wed 6/112:30
GEG
-
LHR
1 stop34h 55m
Lufthansa
Deal found 27/4£771
Mon 6/711:25
LHR
-
GEG
1 stop17h 40m
Lufthansa
Mon 13/712:37
GEG
-
LHR
1 stop17h 33m
Lufthansa
Deal found 28/4£776
Wed 30/909:30
LHR
-
BOI
2 stops31h 05m
Air Canada
Sun 4/1017:44
BOI
-
LHR
2 stops29h 51m
Air Canada
Deal found 28/4£776
Sat 2/510:20
LGW
-
BOI
2 stops19h 42m
Multiple Airlines
Sun 10/509:02
BOI
-
LGW
2 stops22h 38m
Multiple Airlines
Deal found 27/4£789
Sat 2/510:20
LGW
-
BOI
2 stops19h 42m
Multiple Airlines
Sat 9/514:57
BOI
-
LGW
2 stops16h 43m
Multiple Airlines
Deal found 27/4£795

Find 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 29 April 2026.

Round-trip from

£656

One-way from

£405

Popular in

December

Cheapest in

January

Average price

£621
United Airlines
  • United Airlines
  • 9/9-13/9
  • 3 total stops
  • 69h 24m total
  • United Kingdom to Idaho
Search Deals
8/6
  • 8/6
  • 3 total stops
  • 32h 20m total
  • United Kingdom to Idaho
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£43 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
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 29 April 2026.
Use the filters below to find and compare flights from the United Kingdom to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 9/9

08:40-21:16

2 stops20h 36m

Spokane

Sun 13/9

11:16-06:45

1 stop35h 29m

£658

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 30/9

14:50-21:31

1 stop13h 41m

Boise Air Term. Gowen Fld

Sun 4/10

17:44-09:40

1 stop32h 56m

£684

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 30/9

09:30-09:35

2 stops31h 05m

Boise Air Term. Gowen Fld

Sun 4/10

17:44-06:35

2 stops29h 51m

£776

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 6/7

11:25-21:05

1 stop17h 40m

Spokane

Mon 13/7

13:41-18:25

2 stops20h 44m

£779

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 27/5

07:25-21:40

2 stops21h 15m

Boise Air Term. Gowen Fld

Wed 3/6

08:30-06:45

1 stop15h 15m

£780

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 23/6

13:00-13:08

1 stop31h 08m

Boise Air Term. Gowen Fld

Sat 4/7

05:00-10:00

2 stops22h 00m

£797

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 23/6

12:15-22:37

2 stops17h 22m

Boise Air Term. Gowen Fld

Sun 5/7

10:20-20:40

2 stops27h 20m

£802

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 6/7

13:05-23:51

2 stops18h 46m

Spokane

Mon 13/7

05:00-06:45

2 stops17h 45m

£804

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 25/5

11:25-21:05

1 stop17h 40m

Spokane

Tue 9/6

07:00-08:20

2 stops17h 20m

£804

LondonIdaho Falls

LGW - IDA

LGWIDA

London Gatwick

Tue 1/9

13:00-22:56

2 stops16h 56m

Idaho Falls Fanning Field

Fri 25/9

13:45-14:40

2 stops17h 55m

£813

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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6

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

How far ahead should I book a flight from United Kingdom to Idaho?

Booking 19 days in advance of your planned departure date is, on average, the best time to get cheap flights from United Kingdom to Idaho. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from United Kingdom to Idaho (average of £498). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £633). 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.

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 29 April 2026.
See what other customers who have flown with KLM,United Airlines, andVirgin Atlantic 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
7.8
Good
1,512 reviews
Check prices

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,512 reviews
KLM
7.8
Good
1,512 reviews
Check prices

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,677 reviews
KLM
7.8
Good
1,512 reviews
Check prices

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Virgin Atlantic
7.4
Good
688 reviews
KLM
7.8
Good
1,512 reviews
Check prices

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Icelandair
7.0
Good
646 reviews
KLM
7.8
Good
1,512 reviews
Check prices

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Lufthansa
6.8
Okay
7,962 reviews
KLM
7.8
Good
1,512 reviews
Check prices

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Overall

7.8

Food

7.3

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 17h 40m. The distance between United Kingdom and Idaho is about 4643 mi. This flight may include one or multiple stops.

  • 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, January is the cheapest month in which you can book a flight from United Kingdom to Idaho (average of £498). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £633). 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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Luton to Los Angeles flights

Top 7 airlines flying from United Kingdom to Idaho

Discover the top 7 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 29 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£466Average£795FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£505Average£667FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£596Average£785FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£598Average£916FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£696Average£709FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£696Average£816FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest£791Average£1,156FlexibilityNo cancel feeOn-timeN/A
Search Delta 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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