Cheap flights from London Heathrow Airport to Idaho from £382

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 30/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
23 Jul — 30 Jul1
1 adult

Cheap flight deals from Heathrow to Idaho

Keep the following information in mind while searching for Heathrow to Idaho flight deals. Data was last updated 18 July 2025.

Round-trip from

£516

One-way from

£382

Popular in

July

Cheapest in

November

Average price

£934
United Airlines
  • United Airlines
  • 1/9-8/9
  • 4 total stops
  • 56h 45m total
  • London to Idaho
30/8
  • 30/8
  • 2 total stops
  • 38h 49m total
  • London to Idaho
Highest demand for flights based on searches. 17% potential increase in price (£110 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from Heathrow to Idaho

Cheapest flights from Heathrow to Idaho
Explore the most affordable flight options available from Heathrow to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 July 2025.

Mon 1/912:10LHR - GEG
2 stops54h 28mUnited Airlines
Mon 8/912:35GEG - LHR
1 stop34h 50mUnited Airlines
Deal found 18/7£516
Mon 1/920:55LHR - GEG
2 stops34h 53mVirgin Atlantic
Mon 8/917:30GEG - LHR
1 stop33h 50mVirgin Atlantic
Deal found 17/7£518
Mon 1/910:35LHR - GEG
1 stop20h 30mLufthansa
Mon 8/912:35GEG - LHR
1 stop34h 50mLufthansa
Deal found 18/7£533
Mon 1/906:40LHR - GEG
2 stops23h 45mMultiple Airlines
Mon 8/906:25GEG - LHR
2 stops27h 15mMultiple Airlines
Deal found 18/7£549
Mon 25/811:15LHR - BOI
1 stop15h 35mMultiple Airlines
Tue 9/912:43BOI - LHR
1 stop19h 57mMultiple Airlines
Deal found 16/7£560
Sat 30/807:25LHR - BOI
2 stops21h 56mUnited Airlines
Sat 13/914:42BOI - LHR
1 stop14h 38mUnited Airlines
Deal found 17/7£595
Sat 30/809:30LHR - BOI
2 stops18h 45mLufthansa
Sat 20/914:42BOI - LHR
2 stops17h 58mLufthansa
Deal found 16/7£603
Fri 26/914:05LHR - BOI
2 stops39h 25mAir Canada
Mon 6/1014:39BOI - LHR
2 stops34h 56mAir Canada
Deal found 18/7£609
Mon 25/806:30LHR - BOI
2 stops17h 27mDelta
Tue 9/910:45BOI - LHR
2 stops17h 15mDelta
Deal found 17/7£622
Wed 6/809:55LHR - GEG
2 stops16h 50mDelta
Thu 14/813:21GEG - LHR
2 stops16h 09mDelta
Deal found 16/7£628
Sat 22/1106:20LHR - IDA
2 stops18h 54mDelta
Wed 26/1106:05IDA - LHR
1 stop20h 55mDelta
Deal found 17/7£656
Sat 30/806:40LHR - BOI
2 stops20h 40mScandinavian Airlines
Sat 13/915:45BOI - LHR
3 stops22h 50mScandinavian Airlines
Deal found 17/7£669

Cheapflights Fare Finder

Customise your flight search to find flights from Heathrow 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 18 July 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Idaho that are best for you.

Fly from

Heathrow

Fly to

Idaho

Route

Depart

Return

Price

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 1/9

08:40-23:05

2 stops22h 25m

Spokane

Mon 8/9

12:35-06:55

2 stops34h 20m

£516

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 1/9

20:55-23:48

2 stops34h 53m

Spokane

Mon 8/9

17:30-06:45

2 stops29h 15m

£518

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 1/9

10:35-23:05

1 stop20h 30m

Spokane

Mon 8/9

12:35-07:25

1 stop34h 50m

£533

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 1/9

06:40-22:25

2 stops23h 45m

Spokane

Mon 8/9

06:25-17:40

2 stops27h 15m

£549

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 25/8

11:15-19:50

1 stop15h 35m

Boise Air Term. Gowen Fld

Tue 9/9

12:43-15:40

1 stop19h 57m

£560

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 30/8

07:25-22:21

2 stops21h 56m

Boise Air Term. Gowen Fld

Sat 13/9

14:42-12:20

1 stop14h 38m

£595

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 30/8

09:30-21:15

2 stops18h 45m

Boise Air Term. Gowen Fld

Sat 20/9

14:42-15:40

2 stops17h 58m

£603

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 26/9

14:05-22:30

2 stops39h 25m

Boise Air Term. Gowen Fld

Mon 6/10

14:39-08:35

2 stops34h 56m

£609

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 25/8

06:30-16:57

2 stops17h 27m

Boise Air Term. Gowen Fld

Tue 9/9

10:45-11:00

2 stops17h 15m

£622

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 6/8

09:55-18:45

2 stops16h 50m

Spokane

Thu 14/8

13:21-13:30

2 stops16h 09m

£628

Flights are sorted by cheapest return flights first.

Deals found on 16/7

Showing 1-10 of 45 results
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Best time to book a flight from Heathrow to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Heathrow 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 London Heathrow Airport to Idaho

What is the cheapest month to book a flight from London Heathrow Airport to Idaho?

Currently, October is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of £754). Flying from London Heathrow Airport to Idaho in August is currently the most expensive (average of £1,152). 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.

What is the cheapest time of day to fly from LHR to ID?

Find hourly flight availability from Heathrow to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 July 2025.

When flying from London Heathrow Airport to Idaho, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 18 July 2025.
See what other customers who have flown with Alaska Airlines, Delta, andAir New Zealand from London Heathrow Airport 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.

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
8.0
Very Good

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What are the cheapest airlines to fly from London Heathrow Airport to Idaho one-way?

    For one-way options, check prices for Lufthansa. According to our data, you can fly for as low as £525. Users have also found prices from £831 and £897 on Icelandair and Virgin Atlantic, respectively.

  • What are the most popular routes from London Heathrow Airport to Idaho?

  • Can I find deals for flights from Heathrow to Idaho that include hotel bookings?

    Yes. In addition to deals on Heathrow to Idaho flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Idaho?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Idaho.

  • Can I find deals for business class flights from Heathrow to Idaho?

    Yes. Cheapflights offers flight deals from Heathrow 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 London Heathrow Airport to Idaho?

    Currently, October is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of £754). Flying from London Heathrow Airport to Idaho in August is currently the most expensive (average of £1,152). 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

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Alternative routes for Heathrow to Idaho

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Heathrow to Idaho

Discover the top 6 airlines that operate flights from Heathrow 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 18 July 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£531Average£631FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£536Average£586FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£539Average£649FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£541Average£810FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£604Average£859FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£670Average£858FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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Certainly. Search results for flights to Idaho from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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