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Cheap flights from London Heathrow Airport to Idaho from £447

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
20 Jun — 27 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Idaho

Enter your travel dates to find the best prices.

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 21 May 2026.

Mon 21/907:30
LHR
-
BOI
2 stops17h 28m
United Airlines
Wed 7/1017:44
BOI
-
LHR
1 stop32h 56m
United Airlines
Deal found 19/5£660
Tue 22/914:50
LHR
-
BOI
1 stop13h 47m
United Airlines
Thu 1/1014:31
BOI
-
LHR
1 stop12h 09m
United Airlines
Deal found 19/5£683
Mon 21/906:30
LHR
-
BOI
2 stops22h 07m
Lufthansa
Sun 4/1014:31
BOI
-
LHR
2 stops33h 14m
Lufthansa
Deal found 19/5£684
Tue 22/915:05
LHR
-
BOI
2 stops27h 03m
Air Canada
Wed 7/1006:25
BOI
-
LHR
2 stops20h 35m
Air Canada
Deal found 19/5£686
Wed 23/909:30
LHR
-
BOI
2 stops19h 07m
Air Canada
Wed 7/1006:25
BOI
-
LHR
2 stops17h 05m
Air Canada
Deal found 19/5£688
Fri 25/918:00
LHR
-
BOI
2 stops25h 02m
Lufthansa
Mon 5/1019:05
BOI
-
LHR
2 stops28h 40m
Lufthansa
Deal found 20/5£689
Wed 23/909:30
LHR
-
BOI
2 stops19h 07m
Air Canada
Tue 6/1017:44
BOI
-
LHR
2 stops29h 51m
Air Canada
Deal found 19/5£692
Sat 21/1109:00
LHR
-
GEG
2 stops22h 38m
Multiple Airlines
Sat 28/1107:02
GEG
-
LHR
1 stop20h 13m
Multiple Airlines
Deal found 16/5£705
Sat 21/1109:00
LHR
-
GEG
2 stops22h 38m
United Airlines
Sat 28/1107:02
GEG
-
LHR
1 stop20h 13m
United Airlines
Deal found 17/5£712
Fri 18/911:25
LHR
-
BOI
1 stop13h 33m
United Airlines
Thu 1/1017:44
BOI
-
LHR
1 stop11h 41m
United Airlines
Deal found 19/5£713
Tue 22/915:05
LHR
-
BOI
2 stops27h 03m
Air Canada
Sat 3/1017:44
BOI
-
LHR
2 stops29h 46m
Air Canada
Deal found 19/5£716
Fri 18/909:30
LHR
-
BOI
2 stops31h 04m
Air Canada
Wed 7/1006:25
BOI
-
LHR
2 stops17h 05m
Air Canada
Deal found 19/5£718

Find flight deals from Heathrow to Idaho

Keep the following information in mind while searching for Heathrow to Idaho flight deals. Data was last updated 21 May 2026.

Round-trip from

£660

One-way from

£447

Popular in

December

Cheapest in

January

Average price

£677
United Airlines
  • United Airlines
  • 21/9-7/10
  • 4 total stops
  • 32h 43m total
  • London to Idaho
Search Deals
4/6
  • 4/6
  • 3 total stops
  • 37h 21m total
  • London 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 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 21 May 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 23/6

12:00-22:37

2 stops17h 37m

Boise Air Term. Gowen Fld

Sun 5/7

19:05-10:10

2 stops32h 05m

£768

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 22/6

14:50-21:35

1 stop13h 45m

Boise Air Term. Gowen Fld

Sun 28/6

17:46-09:40

1 stop32h 54m

£769
Fastest return journey

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 22/6

14:50-21:05

1 stop14h 15m

Spokane

Mon 6/7

13:41-12:25

1 stop14h 44m

£796

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 22/6

10:25-21:05

2 stops18h 40m

Spokane

Mon 6/7

06:00-07:25

1 stop17h 25m

£800

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 1/7

07:45-21:05

2 stops21h 20m

Spokane

Wed 15/7

16:18-12:35

1 stop12h 17m

£809

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 8/6

21:25-21:18

2 stops31h 53m

Spokane

Tue 7/7

19:45-20:20

2 stops16h 35m

£818

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 1/7

17:45-23:55

1 stop14h 10m

Spokane

Wed 15/7

12:50-13:15

1 stop16h 25m

£878

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 8/6

06:30-15:40

2 stops17h 10m

Spokane

Tue 7/7

13:00-12:05

1 stop15h 05m

£880

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 9/6

06:30-17:30

2 stops18h 00m

Boise Air Term. Gowen Fld

Tue 16/6

11:55-12:10

1 stop17h 15m

£888

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/6

12:55-22:15

1 stop16h 20m

Idaho Falls Fanning Field

Tue 16/6

14:26-10:55

1 stop13h 29m

£911

Flights are sorted by cheapest return flights first.

Deals found on 21/5

Showing 1-10 of 52 resultsSorted by cheapest first
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6

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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of £508). Flying from London Heathrow Airport to Idaho in January is currently the most expensive (average of £787). 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.

How much does it cost for a return flight from London Heathrow Airport to Idaho?

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 21 May 2026.
See what other customers who have flown with Virgin Atlantic,United Airlines, andLufthansa 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.
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
689 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
9,752 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Lufthansa
6.8
Okay
8,018 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

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.

  • How long is the flight from London Heathrow Airport to Idaho?

    For as low as £768, Lufthansa can have you in Idaho from London Heathrow Airport in 17h 37m. Airlines will cover a distance of 4829 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    While some choose either London Heathrow - Idaho Falls Fanning Field or London Heathrow - Jackson Hole, London Heathrow - Boise Air Term. Gowen Fld is the most popular route 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of £508). Flying from London Heathrow Airport to Idaho in January is currently the most expensive (average of £787). 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.
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Gatwick to O'Hare Intl flights
Stansted to O'Hare Intl flights
Heathrow to George Bush Intcntl flights

Top 3 airlines flying from Heathrow to Idaho

Discover the top 3 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 21 May 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£508Average£695FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£547Average£689FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£600Average£834FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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 Heathrow to Idaho?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Idaho from Heathrow today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Idaho?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Idaho.

Can Cheapflights find flights from Heathrow to Idaho with no change fees?

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.

Can Cheapflights notify me if prices for flights from Heathrow to Idaho become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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