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Cheap flights from the United Kingdom to Idaho from £310

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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
4 Mar — 11 Mar1
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 2 February 2026.

Tue 17/306:30
LHR
-
BOI
2 stops19h 55m
Multiple Airlines
Tue 24/311:58
BOI
-
LHR
1 stop16h 32m
Multiple Airlines
Deal found 31/1£541
Tue 3/309:00
LHR
-
BOI
2 stops19h 11m
United Airlines
Tue 10/310:21
BOI
-
LHR
2 stops18h 04m
United Airlines
Deal found 1/2£553
Tue 10/306:35
LHR
-
GEG
2 stops21h 28m
United Airlines
Tue 17/306:00
GEG
-
LHR
1 stop16h 55m
United Airlines
Deal found 1/2£556
Wed 18/308:30
LHR
-
BOI
2 stops20h 26m
United Airlines
Wed 25/310:49
BOI
-
LHR
1 stop19h 11m
United Airlines
Deal found 1/2£557
Tue 17/306:35
LHR
-
BOI
2 stops20h 54m
United Airlines
Tue 24/307:47
BOI
-
LHR
2 stops18h 38m
United Airlines
Deal found 31/1£558
Tue 1/909:30
LHR
-
BOI
2 stops18h 46m
Lufthansa
Tue 15/914:43
BOI
-
LHR
1 stop11h 57m
Lufthansa
Deal found 30/1£560
Tue 1/908:45
LHR
-
BOI
2 stops19h 30m
United Airlines
Tue 15/907:00
BOI
-
LHR
2 stops16h 55m
United Airlines
Deal found 30/1£567
Mon 20/409:00
LHR
-
BOI
2 stops20h 35m
United Airlines
Mon 27/405:00
BOI
-
LHR
1 stop21h 40m
United Airlines
Deal found 1/2£568
Tue 3/310:25
LHR
-
BOI
1 stop15h 22m
Lufthansa
Tue 10/307:47
BOI
-
LHR
1 stop18h 08m
Lufthansa
Deal found 1/2£573
Mon 4/508:40
LHR
-
GEG
2 stops21h 00m
United Airlines
Sun 10/512:35
GEG
-
LHR
1 stop34h 50m
United Airlines
Deal found 1/2£573
Mon 20/418:00
LHR
-
BOI
2 stops24h 49m
Lufthansa
Mon 27/419:03
BOI
-
LHR
2 stops28h 42m
Lufthansa
Deal found 1/2£586
Wed 18/312:20
LHR
-
IDA
1 stop16h 32m
Multiple Airlines
Wed 25/306:00
IDA
-
LHR
2 stops20h 45m
Multiple Airlines
Deal found 1/2£587

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 2 February 2026.

Round-trip from

£541

One-way from

£310

Popular in

December

Cheapest in

January

Average price

£587
17/3-24/3
  • 17/3-24/3
  • 3 total stops
  • 36h 27m total
  • United Kingdom to Idaho
Search Deals
6/6
  • 6/6
  • 1 total stop
  • 20h 36m 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 February 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 2 February 2026.
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

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 17/3

06:30-20:25

2 stops19h 55m

Boise Air Term. Gowen Fld

Tue 24/3

11:58-10:30

1 stop16h 32m

£541

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 3/3

09:00-21:11

2 stops19h 11m

Boise Air Term. Gowen Fld

Tue 10/3

10:21-10:25

2 stops18h 04m

£553

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:18

2 stops21h 43m

Spokane

Tue 17/3

06:00-11:05

2 stops22h 05m

£556

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 18/3

08:30-22:56

2 stops20h 26m

Boise Air Term. Gowen Fld

Wed 25/3

10:49-12:00

1 stop19h 11m

£557

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 17/3

06:35-21:29

2 stops20h 54m

Boise Air Term. Gowen Fld

Tue 24/3

07:47-08:25

2 stops18h 38m

£558

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 20/4

09:00-22:35

2 stops20h 35m

Boise Air Term. Gowen Fld

Mon 27/4

05:00-09:40

1 stop21h 40m

£568

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/5

08:40-21:40

2 stops21h 00m

Spokane

Sun 10/5

12:35-10:10

2 stops37h 35m

£573

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 20/4

18:00-11:49

2 stops24h 49m

Boise Air Term. Gowen Fld

Mon 27/4

19:03-06:45

2 stops28h 42m

£586

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

£589

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 7/3

06:35-22:43

2 stops23h 08m

Boise Air Term. Gowen Fld

Sat 14/3

10:49-07:25

1 stop14h 36m

£628

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Showing 1-10 of 60 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, March is the cheapest month in which you can book a flight from United Kingdom to Idaho (average of £503). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £656). 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 2 February 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
7.7
Good
1,448 reviews
Check prices

Entertainment

7.1

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.7

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,448 reviews
KLM
7.7
Good
1,448 reviews
Check prices

Entertainment

7.1

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.7

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,448 reviews
Check prices

Entertainment

7.1

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.7

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,229 reviews
KLM
7.7
Good
1,448 reviews
Check prices

Entertainment

7.1

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.7

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Icelandair
7.1
Good
606 reviews
KLM
7.7
Good
1,448 reviews
Check prices

Entertainment

7.1

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.7

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,758 reviews
KLM
7.7
Good
1,448 reviews
Check prices

Entertainment

7.1

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.7

Comfort

7.6

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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.

  • 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, March is the cheapest month in which you can book a flight from United Kingdom to Idaho (average of £503). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £656). 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 2 February 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£460Average£783FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£525Average£662FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£588Average£826FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£590Average£916FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£636Average£713FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£643Average£763FlexibilityNo cancel feeOn-time77%
Search Air France flights
KLMCheapest£684Average£792FlexibilityNo 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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