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Cheap flights from the United Kingdom to Idaho from £355

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
14 Jun — 21 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 15 May 2026.

Tue 24/1109:00
LHR
-
GEG
2 stops22h 38m
Multiple Airlines
Tue 1/1212:30
GEG
-
LHR
2 stops17h 00m
Multiple Airlines
Deal found 13/5£658
Mon 2/1109:00
LHR
-
GEG
2 stops22h 38m
Multiple Airlines
Mon 16/1107:02
GEG
-
LHR
1 stop16h 23m
Multiple Airlines
Deal found 12/5£662
Wed 2/908:40
LHR
-
GEG
2 stops21h 56m
United Airlines
Wed 9/905:00
GEG
-
LHR
2 stops18h 15m
United Airlines
Deal found 12/5£669
Wed 9/908:40
LHR
-
GEG
2 stops20h 36m
United Airlines
Wed 23/916:00
GEG
-
LHR
1 stop12h 35m
United Airlines
Deal found 11/5£670
Tue 1/906:55
LHR
-
BOI
2 stops21h 42m
United Airlines
Mon 14/906:30
BOI
-
LHR
2 stops17h 25m
United Airlines
Deal found 11/5£673
Wed 2/909:30
LHR
-
BOI
2 stops19h 07m
United Airlines
Tue 15/919:01
BOI
-
LHR
1 stop29h 24m
United Airlines
Deal found 11/5£674
Tue 24/1111:35
LHR
-
GEG
1 stop17h 34m
Lufthansa
Tue 1/1207:02
GEG
-
LHR
1 stop16h 23m
Lufthansa
Deal found 13/5£686
Wed 2/914:50
LHR
-
GEG
1 stop14h 24m
Lufthansa
Wed 9/913:38
GEG
-
LHR
1 stop14h 57m
Lufthansa
Deal found 12/5£690
Mon 22/613:00
LHR
-
BOI
1 stop17h 55m
United Airlines
Sun 28/612:33
BOI
-
LHR
1 stop13h 27m
United Airlines
Deal found 11/5£690
Mon 23/1110:05
LHR
-
GEG
1 stop21h 33m
United Airlines
Thu 3/1212:30
GEG
-
LHR
1 stop14h 45m
United Airlines
Deal found 13/5£694
Tue 8/911:25
LHR
-
BOI
1 stop13h 28m
United Airlines
Thu 24/914:31
BOI
-
LHR
1 stop12h 09m
United Airlines
Deal found 11/5£697
Wed 25/1114:30
LHR
-
BOI
2 stops31h 26m
Air Canada
Sun 6/1217:22
BOI
-
LHR
2 stops30h 48m
Air Canada
Deal found 11/5£700

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 15 May 2026.

Round-trip from

£662

One-way from

£355

Popular in

December

Cheapest in

January

Average price

£680
Lufthansa
  • Lufthansa
  • 2/11-16/11
  • 3 total stops
  • 39h 01m total
  • United Kingdom to Idaho
Search Deals
1/9
  • 1/9
  • 2 total stops
  • 51h 19m total
  • United Kingdom to Idaho
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£50 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£30 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 15 May 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

13:00-21:16

1 stop16h 16m

Spokane

Wed 23/9

06:00-07:25

1 stop17h 25m

£697
Fastest return journey

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 8/9

14:50-21:25

1 stop13h 35m

Boise Air Term. Gowen Fld

Mon 21/9

17:44-12:25

1 stop11h 41m

£697

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 1/6

19:30-16:57

2 stops29h 27m

Spokane

Fri 5/6

13:11-18:30

3 stops21h 19m

£742

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 24/6

08:00-17:56

2 stops16h 56m

Boise Air Term. Gowen Fld

Wed 30/9

17:44-12:35

1 stop11h 51m

£750

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sun 13/9

14:50-21:25

1 stop13h 35m

Boise Air Term. Gowen Fld

Sat 26/9

17:44-12:25

1 stop11h 41m

£759

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 23/6

11:25-17:56

1 stop13h 31m

Boise Air Term. Gowen Fld

Sun 5/7

14:05-07:25

1 stop34h 20m

£783

ManchesterSpokane

MAN - GEG

MANGEG

Manchester

Wed 11/11

06:10-10:55

2 stops36h 45m

Spokane

Sun 15/11

11:30-17:00

2 stops45h 30m

£783

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Fri 5/6

10:20-23:58

2 stops20h 38m

Boise Air Term. Gowen Fld

Mon 8/6

06:35-18:50

2 stops29h 15m

£789

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 29/6

08:00-21:05

2 stops21h 05m

Spokane

Mon 6/7

05:00-11:35

2 stops22h 35m

£811

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 8/9

10:55-16:48

1 stop12h 53m

Boise Air Term. Gowen Fld

Sun 27/9

23:30-06:25

1 stop23h 55m

£837

Flights are sorted by cheapest return flights first.

Deals found on 13/5

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 76 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 £504). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £649). 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 15 May 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
1,517 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.2

Comfort

7.7

Crew

8.4

Overall

7.8

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
1,517 reviews
KLM
7.8
Good
1,517 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.2

Comfort

7.7

Crew

8.4

Overall

7.8

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
9,729 reviews
KLM
7.8
Good
1,517 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.2

Comfort

7.7

Crew

8.4

Overall

7.8

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
1,517 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.2

Comfort

7.7

Crew

8.4

Overall

7.8

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
654 reviews
KLM
7.8
Good
1,517 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.2

Comfort

7.7

Crew

8.4

Overall

7.8

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
8,004 reviews
KLM
7.8
Good
1,517 reviews
Check prices

Boarding

7.8

Food

7.3

Entertainment

7.2

Comfort

7.7

Crew

8.4

Overall

7.8

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 13h 31m. The distance between United Kingdom and Idaho is about 4829 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 £504). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £649). 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 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 15 May 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£511Average£698FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£549Average£688FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£603Average£811FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£606Average£740FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£704Average£717FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£705Average£802FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest£801Average£1,170FlexibilityNo 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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