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Cheap flights from London Heathrow Airport to Idaho from £403

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 18/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
23 Jun — 30 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 24 May 2026.

Mon 21/907:30
LHR
-
BOI
2 stops17h 28m
United Airlines
Mon 5/1006:25
BOI
-
LHR
2 stops17h 20m
United Airlines
Deal found 19/5£659
Tue 8/907:25
LHR
-
GEG
2 stops19h 26m
United Airlines
Tue 15/905:00
GEG
-
LHR
2 stops16h 55m
United Airlines
Deal found 22/5£659
Mon 14/906:55
LHR
-
BOI
2 stops22h 45m
United Airlines
Sun 27/919:05
BOI
-
LHR
1 stop33h 05m
United Airlines
Deal found 21/5£659
Mon 14/911:05
LHR
-
BOI
1 stop31h 21m
Lufthansa
Sun 27/917:44
BOI
-
LHR
1 stop32h 56m
Lufthansa
Deal found 21/5£660
Tue 8/914:50
LHR
-
GEG
1 stop14h 24m
Lufthansa
Tue 15/913:37
GEG
-
LHR
1 stop14h 48m
Lufthansa
Deal found 22/5£677
Tue 22/909:30
LHR
-
BOI
2 stops19h 07m
United Airlines
Mon 5/1017:44
BOI
-
LHR
1 stop11h 41m
United Airlines
Deal found 19/5£682
Mon 21/906:30
LHR
-
BOI
2 stops22h 07m
Lufthansa
Sun 4/1014:31
BOI
-
LHR
2 stops33h 14m
Lufthansa
Deal found 19/5£682
Mon 7/914:50
LHR
-
GEG
1 stop13h 56m
United Airlines
Mon 14/913:09
GEG
-
LHR
1 stop17h 01m
United Airlines
Deal found 22/5£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£685
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£687
Fri 25/918:00
LHR
-
BOI
2 stops25h 02m
Lufthansa
Mon 5/1019:05
BOI
-
LHR
2 stops28h 40m
Lufthansa
Deal found 20/5£688
Thu 10/907:25
LHR
-
GEG
2 stops23h 16m
United Airlines
Mon 14/913:09
GEG
-
LHR
1 stop17h 01m
United Airlines
Deal found 22/5£690

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 24 May 2026.

Round-trip from

£659

One-way from

£403

Popular in

December

Cheapest in

January

Average price

£676
United Airlines
  • United Airlines
  • 21/9-6/10
  • 3 total stops
  • 39h 08m total
  • London to Idaho
Search Deals
United Airlines
  • United Airlines
  • 18/9
  • 1 total stop
  • 13h 47m 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 (£29 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 24 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

Mon 21/9

07:30-17:58

2 stops17h 28m

Boise Air Term. Gowen Fld

Tue 6/10

06:25-05:55

2 stops16h 30m

£659

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 22/9

09:30-21:37

2 stops19h 07m

Boise Air Term. Gowen Fld

Thu 1/10

14:31-09:40

1 stop12h 09m

£682

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 23/9

11:25-17:58

1 stop13h 33m

Boise Air Term. Gowen Fld

Sun 4/10

19:05-07:25

1 stop29h 20m

£682

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 10/9

07:25-22:41

2 stops23h 16m

Spokane

Mon 14/9

05:00-09:20

2 stops20h 20m

£690

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 8/9

07:05-18:47

3 stops19h 42m

Spokane

Tue 15/9

10:50-18:30

2 stops23h 40m

£729
Fastest return journey

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 19/9

11:25-17:58

1 stop13h 33m

Boise Air Term. Gowen Fld

Fri 2/10

17:44-12:25

1 stop11h 41m

£741

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sun 5/7

11:05-22:56

2 stops42h 51m

Boise Air Term. Gowen Fld

Sun 12/7

19:05-06:45

2 stops28h 40m

£790

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

£799

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 23/6

18:00-11:32

2 stops24h 32m

Boise Air Term. Gowen Fld

Sat 4/7

19:05-20:40

2 stops18h 35m

£801

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 23/6

06:30-17:56

2 stops18h 26m

Boise Air Term. Gowen Fld

Sun 5/7

12:38-18:40

2 stops47h 02m

£802

Flights are sorted by cheapest return flights first.

Deals found on 19/5

Showing 1-10 of 48 resultsSorted by cheapest first
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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, 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 £785). 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 24 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

Comfort

7.3

Entertainment

7.5

Food

6.9

Boarding

7.7

Overall

7.5

Crew

8.1

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

Comfort

7.3

Entertainment

7.5

Food

6.9

Boarding

7.7

Overall

7.5

Crew

8.1

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

Comfort

7.3

Entertainment

7.5

Food

6.9

Boarding

7.7

Overall

7.5

Crew

8.1

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
8,023 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Food

6.9

Boarding

7.7

Overall

7.5

Crew

8.1

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 £659, United Airlines can have you in Idaho from London Heathrow Airport in 17h 28m. 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 £785). 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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Top 4 airlines flying from Heathrow to Idaho

Discover the top 4 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 24 May 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£507Average£694FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£546Average£680FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£599Average£834FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Alaska AirlinesCheapest£834Average£1,117FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines 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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