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Cheap flights from London Heathrow Airport to Idaho from £475

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 26/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOI
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

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 31 October 2025.

Round-trip from

£552

One-way from

£475

Popular in

July

Cheapest in

September

Average price

£756
United Airlines
  • United Airlines
  • 8/12-15/12
  • 3 total stops
  • 45h 10m total
  • London to Idaho
Search Deals
26/11
  • 26/11
  • 3 total stops
  • 28h 11m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£91 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find 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 31 October 2025.

Mon 8/1207:40LHR - BOI
2 stops33h 19mUnited Airlines
Mon 15/1214:49BOI - LHR
1 stop11h 51mUnited Airlines
Deal found 31/10£552
Tue 9/1208:30LHR - BOI
2 stops21h 15mUnited Airlines
Mon 15/1206:20BOI - LHR
1 stop20h 20mUnited Airlines
Deal found 30/10£556
Wed 26/1107:30LHR - GEG
2 stops21h 15mUnited Airlines
Wed 3/1207:00GEG - LHR
1 stop21h 00mUnited Airlines
Deal found 29/10£559
Tue 9/1206:35LHR - BOI
2 stops18h 32mUnited Airlines
Sun 14/1217:25BOI - LHR
1 stop33h 15mUnited Airlines
Deal found 31/10£559
Tue 9/1211:35LHR - BOI
1 stop13h 32mLufthansa
Mon 15/1214:49BOI - LHR
1 stop11h 51mLufthansa
Deal found 30/10£568
Tue 9/1207:40LHR - BOI
2 stops19h 03mLufthansa
Sun 14/1214:49BOI - LHR
2 stops32h 06mLufthansa
Deal found 31/10£568
Wed 26/1113:45LHR - GEG
1 stop17h 14mLufthansa
Wed 3/1212:33GEG - LHR
1 stop15h 27mLufthansa
Deal found 29/10£569
Wed 12/1110:45LHR - GEG
1 stop15h 48mVirgin Atlantic
Thu 20/1106:05GEG - LHR
1 stop17h 00mVirgin Atlantic
Deal found 29/10£653
Wed 12/1108:40LHR - GEG
2 stops19h 23mDelta
Thu 20/1107:05GEG - LHR
2 stops16h 00mDelta
Deal found 29/10£663
Wed 26/1118:00LHR - GEG
3 stops26h 45mMultiple Airlines
Wed 3/1207:00GEG - LHR
2 stops20h 50mMultiple Airlines
Deal found 29/10£696
Tue 23/1220:15LHR - GEG
2 stops32h 43mLufthansa
Mon 29/1206:00GEG - LHR
1 stop17h 25mLufthansa
Deal found 28/10£711
Sat 22/1117:50LHR - SUN
2 stops35h 09mVirgin Atlantic
Tue 2/1213:06SUN - LHR
1 stop13h 54mVirgin Atlantic
Deal found 30/10£741

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 31 October 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

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 9/12

06:35-18:07

2 stops18h 32m

Boise Air Term. Gowen Fld

Mon 15/12

12:16-11:15

1 stop15h 59m

£552

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 8/12

07:40-09:59

2 stops33h 19m

Boise Air Term. Gowen Fld

Mon 15/12

09:40-11:15

2 stops18h 35m

£552

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 26/11

09:30-22:59

2 stops21h 29m

Spokane

Wed 3/12

05:25-10:50

2 stops21h 25m

£559

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:20

2 stops21h 45m

Spokane

Tue 17/3

06:05-06:20

2 stops17h 15m

£559

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 9/12

06:35-18:07

2 stops18h 32m

Boise Air Term. Gowen Fld

Sun 14/12

12:16-05:55

1 stop34h 39m

£562

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 24/2

07:30-17:45

2 stops17h 15m

Boise Air Term. Gowen Fld

Mon 9/3

14:43-09:40

1 stop12h 57m

£565

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 20/4

07:25-21:16

2 stops20h 51m

Boise Air Term. Gowen Fld

Mon 27/4

07:00-07:15

2 stops17h 15m

£572

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Sat 22/11

17:50-21:59

2 stops35h 09m

Hailey Sun Valley-Friedman

Tue 2/12

13:06-10:00

1 stop13h 54m

£741

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 21/4

20:55-18:14

2 stops28h 19m

Idaho Falls Fanning Field

Fri 1/5

18:50-09:50

1 stop32h 00m

£760

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Thu 15/1

12:20-19:38

1 stop14h 18m

Hailey Sun Valley-Friedman

Sat 24/1

11:56-13:05

1 stop18h 09m

£766

Flights are sorted by cheapest return flights first.

Deals found on 29/10

Showing 1-10 of 44 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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of £549). Flying from London Heathrow Airport to Idaho in July is currently the most expensive (average of £687). 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 31 October 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 10% on flights from London Heathrow Airport to Idaho by exploring options for tickets in the evening.

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 31 October 2025.
See what other customers who have flown with Finnair, Virgin Atlantic, andUnited Airlines 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.
Finnair
7.6
Good
1,333 reviews
Check prices

Comfort

7.4

Entertainment

6.9

Crew

8.1

Overall

7.6

Boarding

7.6

Food

6.7

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Finnair
7.6
Good
1,333 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Comfort

7.4

Entertainment

6.9

Crew

8.1

Overall

7.6

Boarding

7.6

Food

6.7

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Virgin Atlantic
7.5
Good
671 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Comfort

7.4

Entertainment

6.9

Crew

8.1

Overall

7.6

Boarding

7.6

Food

6.7

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
United Airlines
7.4
Good
8,995 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Comfort

7.4

Entertainment

6.9

Crew

8.1

Overall

7.6

Boarding

7.6

Food

6.7

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Lufthansa
6.8
Okay
7,542 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Comfort

7.4

Entertainment

6.9

Crew

8.1

Overall

7.6

Boarding

7.6

Food

6.7

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

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 £552, United Airlines can have you in Idaho from London Heathrow Airport in 18h 32m. 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 cheapest airlines to fly from London Heathrow Airport to Idaho one-way?

    For one-way options, check prices for Icelandair. According to our data, you can fly for as low as £820. Users have also found prices from £918 and £945 on Finnair and Lufthansa, respectively.

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

    While some choose either London Heathrow - Spokane or London Heathrow - Hailey Sun Valley-Friedman, 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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of £549). Flying from London Heathrow Airport to Idaho in July is currently the most expensive (average of £687). 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 31 October 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£527Average£650FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£550Average£865FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£553Average£653FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£611Average£874FlexibilityNo 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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