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Cheap flights from the United Kingdom to Idaho from £345

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 16/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
30 Jul — 6 Aug1
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 30 June 2026.

Tue 1/906:40
LHR
-
BOI
2 stops19h 08m
Scandinavian Airlines
Sun 13/912:14
BOI
-
LHR
2 stops23h 16m
Scandinavian Airlines
Deal found 26/6£566
Tue 29/906:40
LHR
-
GEG
2 stops18h 29m
Scandinavian Airlines
Tue 6/1013:00
GEG
-
LHR
2 stops19h 00m
Scandinavian Airlines
Deal found 27/6£577
Tue 8/906:40
LHR
-
GEG
2 stops18h 29m
Scandinavian Airlines
Tue 6/1010:50
GEG
-
LHR
2 stops23h 40m
Scandinavian Airlines
Deal found 25/6£580
Fri 18/906:40
LHR
-
BOI
2 stops18h 59m
Scandinavian Airlines
Sun 27/912:14
BOI
-
LHR
2 stops26h 26m
Scandinavian Airlines
Deal found 26/6£581
Tue 15/906:40
LHR
-
BOI
2 stops22h 54m
Scandinavian Airlines
Fri 25/912:14
BOI
-
LHR
2 stops38h 06m
Scandinavian Airlines
Deal found 26/6£592
Mon 7/1215:20
LHR
-
GEG
2 stops28h 04m
United Airlines
Wed 13/107:02
GEG
-
LHR
1 stop16h 23m
United Airlines
Deal found 25/6£623
Wed 2/1210:25
LHR
-
GEG
2 stops32h 59m
United Airlines
Sun 6/1211:30
GEG
-
LHR
1 stop34h 25m
United Airlines
Deal found 28/6£624
Wed 23/914:05
LHR
-
BOI
2 stops40h 54m
United Airlines
Tue 6/1014:44
BOI
-
LHR
1 stop11h 56m
United Airlines
Deal found 29/6£627
Tue 1/906:40
LHR
-
BOI
2 stops22h 50m
Scandinavian Airlines
Wed 16/916:00
BOI
-
LHR
2 stops41h 00m
Scandinavian Airlines
Deal found 28/6£644
Thu 3/1207:40
LHR
-
BOI
2 stops23h 19m
United Airlines
Sun 6/1218:55
BOI
-
LHR
1 stop33h 20m
United Airlines
Deal found 28/6£654
Fri 30/1013:00
LHR
-
BOI
2 stops28h 14m
United Airlines
Mon 16/1112:32
BOI
-
LHR
1 stop12h 23m
United Airlines
Deal found 29/6£656
Mon 21/907:30
LHR
-
BOI
2 stops17h 28m
United Airlines
Tue 29/914:20
BOI
-
LHR
1 stop16h 50m
United Airlines
Deal found 26/6£660

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 30 June 2026.

Round-trip from

£566

One-way from

£345

Popular in

December

Cheapest in

January

Average price

£822
Scandinavian Airlines
  • Scandinavian Airlines
  • 1/9-13/9
  • 4 total stops
  • 42h 24m total
  • United Kingdom to Idaho
Search Deals
16/9
  • 16/9
  • 2 total stops
  • 41h 59m total
  • United Kingdom to Idaho
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£44 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 June 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 30 June 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

Tue 8/9

06:40-17:09

2 stops18h 29m

Spokane

Tue 6/10

13:00-18:30

2 stops21h 30m

£581

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 2/12

15:20-11:24

2 stops28h 04m

Spokane

Sun 6/12

11:30-21:20

2 stops25h 50m

£624

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 28/9

11:25-12:36

1 stop33h 11m

Spokane

Thu 8/10

06:00-12:25

2 stops22h 25m

£624

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 6/12

15:20-11:24

2 stops28h 04m

Spokane

Sun 17/1

11:30-05:55

1 stop34h 25m

£652

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Thu 3/12

07:40-23:59

2 stops23h 19m

Boise Air Term. Gowen Fld

Sun 6/12

18:55-11:15

1 stop33h 20m

£654

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 8/9

07:25-18:51

2 stops19h 26m

Spokane

Tue 6/10

13:38-12:25

1 stop14h 47m

£659

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 23/9

07:30-17:58

2 stops17h 28m

Boise Air Term. Gowen Fld

Tue 6/10

06:25-07:15

2 stops17h 50m

£661

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Tue 29/9

10:20-22:25

2 stops20h 05m

Spokane

Tue 6/10

12:44-18:50

2 stops22h 06m

£672

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 5/10

08:00-17:43

2 stops16h 43m

Boise Air Term. Gowen Fld

Mon 19/10

10:30-10:25

2 stops16h 55m

£684

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Tue 1/9

10:20-23:44

2 stops20h 24m

Boise Air Term. Gowen Fld

Wed 16/9

13:15-18:45

2 stops22h 30m

£692

Flights are sorted by cheapest return flights first.

Deals found on 26/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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 £509). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £668). 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 30 June 2026.
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
7.8
Good
1,531 reviews
Check prices

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

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
1,531 reviews
KLM
7.8
Good
1,531 reviews
Check prices

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

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
7.5
Good
690 reviews
KLM
7.8
Good
1,531 reviews
Check prices

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

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
9,897 reviews
KLM
7.8
Good
1,531 reviews
Check prices

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

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
694 reviews
KLM
7.8
Good
1,531 reviews
Check prices

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

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
8,109 reviews
KLM
7.8
Good
1,531 reviews
Check prices

Comfort

7.7

Crew

8.4

Entertainment

7.2

Boarding

7.8

Overall

7.8

Food

7.3

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 18h 29m. 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 £509). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £668). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 30 June 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£515Average£679FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£554Average£699FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£608Average£807FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£664Average£1,116FlexibilityNo cancel feeOn-time75%
Search KLM flights
IcelandairCheapest£710Average£724FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Alaska AirlinesCheapest£745Average£963FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
DeltaCheapest£1,052Average£1,181FlexibilityNo 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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