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Cheap flights from the United Kingdom to Idaho from £360

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
17 May — 24 May1
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 17 April 2026.

Wed 16/910:50
LHR
-
BOI
2 stops20h 00m
United Airlines
Sun 20/919:01
BOI
-
LHR
1 stop29h 24m
United Airlines
Deal found 12/4£655
Sat 5/906:40
LHR
-
BOI
2 stops18h 55m
Scandinavian Airlines
Sat 19/910:23
BOI
-
LHR
2 stops24h 17m
Scandinavian Airlines
Deal found 14/4£690
Sat 31/1011:10
LHR
-
BOI
2 stops37h 45m
Lufthansa
Sat 14/1117:22
BOI
-
LHR
2 stops59h 28m
Lufthansa
Deal found 14/4£701
Sat 21/1107:30
LHR
-
BOI
2 stops20h 46m
Lufthansa
Sat 5/1217:22
BOI
-
LHR
2 stops59h 28m
Lufthansa
Deal found 14/4£702
Fri 9/1014:50
LHR
-
BOI
1 stop13h 26m
Lufthansa
Fri 23/1010:39
BOI
-
LHR
1 stop16h 01m
Lufthansa
Deal found 14/4£711
Fri 29/506:40
LHR
-
GEG
2 stops20h 03m
Scandinavian Airlines
Fri 5/613:11
GEG
-
LHR
2 stops18h 49m
Scandinavian Airlines
Deal found 14/4£720
Sat 30/506:40
LHR
-
BOI
2 stops20h 54m
Scandinavian Airlines
Sat 6/612:15
BOI
-
LHR
3 stops23h 35m
Scandinavian Airlines
Deal found 15/4£721
Mon 4/519:15
LHR
-
GEG
2 stops31h 08m
Virgin Atlantic
Mon 18/516:15
GEG
-
LHR
1 stop11h 55m
Virgin Atlantic
Deal found 15/4£726
Mon 4/516:10
LHR
-
GEG
1 stop30h 09m
American Airlines
Tue 2/605:44
GEG
-
LHR
2 stops20h 31m
American Airlines
Deal found 16/4£743
Mon 2/1111:50
MAN
-
GEG
2 stops32h 50m
United Airlines
Tue 24/1116:00
GEG
-
MAN
2 stops16h 55m
United Airlines
Deal found 12/4£757
Mon 2/1111:50
MAN
-
GEG
2 stops31h 05m
United Airlines
Wed 18/1111:30
GEG
-
MAN
2 stops19h 20m
United Airlines
Deal found 12/4£758
Thu 7/511:25
LHR
-
JAC
1 stop16h 33m
United Airlines
Mon 18/516:15
JAC
-
LHR
1 stop13h 10m
United Airlines
Deal found 13/4£760

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 17 April 2026.

Round-trip from

£655

One-way from

£360

Popular in

December

Cheapest in

January

Average price

£619
United Airlines
  • United Airlines
  • 16/9-20/9
  • 3 total stops
  • 49h 24m total
  • United Kingdom to Idaho
Search Deals
20/5
  • 20/5
  • 3 total stops
  • 39h 23m total
  • United Kingdom to Idaho
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£46 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 17 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

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 16/9

10:50-23:50

2 stops20h 00m

Boise Air Term. Gowen Fld

Sun 20/9

10:37-07:45

2 stops38h 08m

£655

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 9/10

07:25-17:55

2 stops17h 30m

Boise Air Term. Gowen Fld

Fri 23/10

05:00-06:55

2 stops18h 55m

£714

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/5

11:40-18:57

1 stop15h 17m

Spokane

Mon 18/5

14:16-13:05

1 stop14h 49m

£740

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 5/9

06:40-20:18

2 stops20h 38m

Boise Air Term. Gowen Fld

Sat 19/9

10:23-16:25

3 stops23h 02m

£745

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 5/5

13:05-23:02

2 stops16h 57m

Boise Air Term. Gowen Fld

Wed 13/5

16:19-20:20

2 stops21h 01m

£751

LondonJackson

LHR - JAC

LHRJAC

London Heathrow

Thu 7/5

11:25-20:58

1 stop16h 33m

Jackson Hole

Mon 18/5

16:15-12:25

1 stop13h 10m

£760

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 1/6

10:50-22:37

2 stops18h 47m

Boise Air Term. Gowen Fld

Tue 16/6

06:30-12:25

1 stop22h 55m

£779

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Sun 31/5

14:00-23:58

2 stops40h 58m

Boise Air Term. Gowen Fld

Sun 7/6

08:38-10:55

1 stop19h 17m

£784

LondonBoise

LCY - BOI

LCYBOI

London City

Sat 10/10

08:25-22:55

2 stops21h 30m

Boise Air Term. Gowen Fld

Sat 24/10

08:18-14:15

2 stops22h 57m

£797

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 14/5

10:35-21:40

1 stop19h 05m

Spokane

Tue 16/6

16:08-12:25

1 stop12h 17m

£803

Flights are sorted by cheapest return flights first.

Deals found on 17/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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 £497). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £631). 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 17 April 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
1,499 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Crew

8.4

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.8
Good
1,499 reviews
KLM
7.8
Good
1,499 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Crew

8.4

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
687 reviews
KLM
7.8
Good
1,499 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Crew

8.4

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
United Airlines
7.4
Good
9,602 reviews
KLM
7.8
Good
1,499 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Crew

8.4

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Icelandair
7.0
Good
634 reviews
KLM
7.8
Good
1,499 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Crew

8.4

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Lufthansa
6.8
Okay
7,926 reviews
KLM
7.8
Good
1,499 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Crew

8.4

Overall

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 15h 17m. 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 £497). Flying from United Kingdom to Idaho in July is currently the most expensive (average of £631). 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.

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 17 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£465Average£793FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£503Average£665FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£594Average£785FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£597Average£913FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£694Average£707FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£694Average£814FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest£789Average£1,153FlexibilityNo 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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