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

Airlines like Lufthansa, United Airlines, and KLM fly from Idaho to London Heathrow Airport in about 13h 36m. The time it takes to get you to your destination can typically vary by up to 16h 40m. There are 4697 mi between Idaho and London Heathrow Airport. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

The most popular route from Idaho to London Heathrow Airport is Boise Air Term. Gowen Fld - London Heathrow. You may also consider Spokane - London Heathrow or Idaho Falls Fanning Field - London Heathrow.

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

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

How can I find direct flights from Idaho to Heathrow?

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

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

Yes. Cheapflights offers flight deals from Idaho to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£359+ Flights from Idaho to London Heathrow Airport

Cheap flight deals from Idaho to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Idaho to Heathrow
Explore the most affordable flight options available from Idaho to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2025.

Wed 31/1208:20BOI - LHR

1 stop14h 35mUnited Airlines

Thu 8/118:00LHR - BOI

2 stops34h 52mUnited Airlines

Deal found 15/12£615

Wed 31/1205:05GEG - LHR

1 stop20h 35mUnited Airlines

Thu 8/111:10LHR - GEG

2 stops36h 11mUnited Airlines

Deal found 16/12£615

Wed 31/1205:30BOI - LHR

1 stop18h 35mVirgin Atlantic

Thu 8/110:45LHR - BOI

1 stop19h 27mVirgin Atlantic

Deal found 15/12£627

Wed 31/1206:00GEG - LHR

1 stop17h 05mKLM

Thu 8/111:05LHR - GEG

1 stop16h 49mKLM

Deal found 16/12£627

Wed 31/1205:00BOI - LHR

2 stops23h 20mAir Canada

Thu 8/113:25LHR - BOI

2 stops31h 10mAir Canada

Deal found 15/12£628

Wed 31/1205:05GEG - LHR

2 stops18h 05mMultiple Airlines

Thu 8/113:00LHR - GEG

3 stops31h 46mMultiple Airlines

Deal found 16/12£712

Wed 31/1210:42BOI - LHR

3 stops17h 38mMultiple Airlines

Thu 8/113:25LHR - BOI

2 stops27h 41mMultiple Airlines

Deal found 15/12£880

Tue 16/1209:10BOI - LHR

2 stops18h 40mMultiple Airlines

Wed 14/112:15LHR - BOI

2 stops15h 50mMultiple Airlines

Deal found 14/12£1,001

Fri 26/1206:00GEG - LHR

1 stop17h 05mKLM

Tue 6/106:30LHR - GEG

2 stops16h 30mKLM

Deal found 15/12£1,199

Fri 26/1205:55GEG - LHR

1 stop20h 05mMultiple Airlines

Tue 6/106:20LHR - GEG

2 stops17h 55mMultiple Airlines

Deal found 17/12£1,203

Fri 26/1206:00GEG - LHR

2 stops23h 30mLufthansa

Tue 6/107:25LHR - GEG

2 stops21h 57mLufthansa

Deal found 17/12£1,218

Fri 26/1223:59GEG - LHR

2 stops22h 41mUnited Airlines

Tue 6/116:20LHR - GEG

2 stops27h 19mUnited Airlines

Deal found 15/12£1,222

Best flights from Idaho to Heathrow
Discover carefully curated flight deals from Idaho to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 December 2025.

Wed 25/207:00GEG - LHR

1 stop16h 25mLufthansa

Wed 11/306:35LHR - GEG

2 stops21h 28mLufthansa

Deal found 15/12£445

Tue 17/217:24BOI - LHR

2 stops30h 16mUnited Airlines

Thu 26/211:10LHR - BOI

2 stops19h 38mUnited Airlines

Deal found 15/12£462

Thu 15/106:53GEG - LHR

2 stops20h 57mMultiple Airlines

Thu 22/106:35LHR - GEG

2 stops20h 41mMultiple Airlines

Deal found 16/12£462

Wed 14/105:15GEG - LHR

1 stop20h 45mKLM

Sat 31/106:30LHR - GEG

2 stops16h 30mKLM

Deal found 16/12£463

Fri 30/107:05LWS - LHR

2 stops20h 35mDelta

Fri 6/206:30LHR - LWS

2 stops22h 29mDelta

Deal found 16/12£473

Mon 2/207:25BOI - LHR

1 stop20h 30mVirgin Atlantic

Wed 1/411:45LHR - BOI

2 stops17h 02mVirgin Atlantic

Deal found 15/12£545

Wed 4/312:38GEG - LHR

1 stop15h 22mLufthansa

Wed 11/306:35LHR - GEG

2 stops21h 28mLufthansa

Deal found 15/12£445

Thu 15/114:40IDA - LHR

1 stop12h 00mUnited Airlines

Wed 28/106:35LHR - IDA

2 stops34h 21mUnited Airlines

Deal found 16/12£463

Fri 30/113:15IDA - LHR

2 stops15h 25mMultiple Airlines

Fri 6/206:20LHR - IDA

2 stops18h 31mMultiple Airlines

Deal found 16/12£468

Fri 30/112:24LWS - LHR

1 stop13h 36mKLM

Fri 6/217:50LHR - LWS

2 stops35h 09mKLM

Deal found 16/12£469

Tue 13/105:45BOI - LHR

2 stops18h 20mDelta

Tue 20/106:30LHR - BOI

2 stops16h 47mDelta

Deal found 16/12£473

Wed 4/313:44GEG - LHR

2 stops21h 51mLufthansa

Mon 9/307:40LHR - GEG

2 stops20h 38mLufthansa

Deal found 17/12£451

Tue 3/216:19IDA - LHR

1 stop34h 21mUnited Airlines

Tue 10/206:35LHR - IDA

2 stops39h 56mUnited Airlines

Deal found 15/12£469

Tue 17/205:40BOI - LHR

2 stops18h 25mDelta

Fri 27/206:30LHR - BOI

2 stops20h 40mDelta

Deal found 15/12£473

Thu 15/114:07IDA - LHR

1 stop12h 53mMultiple Airlines

Wed 28/116:30LHR - IDA

1 stop28h 07mMultiple Airlines

Deal found 16/12£484

Tue 17/210:45BOI - LHR

1 stop16h 15mKLM

Fri 27/211:05LHR - BOI

1 stop16h 50mKLM

Deal found 15/12£490

Tue 17/207:00GEG - LHR

1 stop16h 25mLufthansa

Thu 26/207:30LHR - GEG

2 stops21h 47mLufthansa

Deal found 15/12£453

Tue 17/214:40BOI - LHR

1 stop12h 00mUnited Airlines

Fri 27/206:35LHR - BOI

2 stops24h 13mUnited Airlines

Deal found 15/12£469

Mon 12/118:35IDA - LHR

2 stops15h 15mDelta

Sun 25/116:50LHR - IDA

2 stops32h 01mDelta

Deal found 15/12£484

Tue 24/212:38GEG - LHR

1 stop15h 22mLufthansa

Tue 10/309:30LHR - GEG

2 stops18h 48mLufthansa

Deal found 15/12£453

Tue 17/205:00BOI - LHR

2 stops17h 55mUnited Airlines

Tue 24/211:10LHR - BOI

2 stops19h 13mUnited Airlines

Deal found 16/12£472

Fri 16/107:00JAC - LHR

1 stop19h 40mUnited Airlines

Tue 20/113:25LHR - JAC

2 stops30h 33mUnited Airlines

Deal found 14/12£475

Mon 23/305:50BOI - LHR

2 stops19h 15mDelta

Wed 8/408:40LHR - BOI

2 stops19h 15mDelta

Deal found 15/12£548

Mon 23/314:40BOI - LHR

1 stop13h 00mLufthansa

Wed 8/407:25LHR - BOI

2 stops21h 11mLufthansa

Deal found 17/12£514

Fri 30/114:40IDA - LHR

1 stop12h 00mUnited Airlines

Tue 3/216:40LHR - IDA

2 stops51h 50mUnited Airlines

Deal found 14/12£477

Thu 15/114:40IDA - LHR

1 stop12h 00mUnited Airlines

Mon 19/113:50LHR - IDA

2 stops51h 06mUnited Airlines

Deal found 16/12£477

Mon 23/305:50BOI - LHR

2 stops19h 15mDelta

Mon 6/411:45LHR - BOI

2 stops16h 21mDelta

Deal found 15/12£585

Mon 5/112:24LWS - LHR

1 stop13h 36mDelta

Tue 10/306:30LHR - LWS

2 stops23h 29mDelta

Deal found 15/12£619

Fri 20/312:20JAC - LHR

2 stops36h 10mUnited Airlines

Fri 3/406:55LHR - JAC

2 stops20h 58mUnited Airlines

Deal found 15/12£624

Last-minute flights from Idaho to Heathrow
Discover last-minute flight deals from Idaho to Heathrow. Data last updated 17 December 2025 and is based on user searches.

Fri 26/1206:00GEG - LHR

1 stop17h 05mKLM

Tue 6/106:30LHR - GEG

2 stops16h 30mKLM

Deal found 15/12£1,199

Fri 26/1205:55GEG - LHR

1 stop20h 05mMultiple Airlines

Tue 6/106:20LHR - GEG

2 stops17h 55mMultiple Airlines

Deal found 17/12£1,203

Fri 26/1206:00GEG - LHR

2 stops23h 30mLufthansa

Tue 6/107:25LHR - GEG

2 stops21h 57mLufthansa

Deal found 17/12£1,218

Fri 26/1223:59GEG - LHR

2 stops22h 41mUnited Airlines

Tue 6/116:20LHR - GEG

2 stops27h 19mUnited Airlines

Deal found 15/12£1,222

Mon 5/112:24LWS - LHR

1 stop13h 36mDelta

Tue 10/306:30LHR - LWS

2 stops23h 29mDelta

Deal found 15/12£619

Mon 12/114:07IDA - LHR

1 stop12h 53mMultiple Airlines

Sun 25/116:30LHR - IDA

1 stop28h 07mMultiple Airlines

Deal found 15/12£484

Thu 15/114:40IDA - LHR

1 stop12h 00mUnited Airlines

Wed 28/106:35LHR - IDA

2 stops34h 21mUnited Airlines

Deal found 16/12£463

Thu 15/114:40IDA - LHR

1 stop12h 00mUnited Airlines

Mon 19/113:50LHR - IDA

2 stops51h 06mUnited Airlines

Deal found 16/12£477

Fri 30/113:15IDA - LHR

1 stop13h 45mMultiple Airlines

Fri 6/206:20LHR - IDA

2 stops18h 31mMultiple Airlines

Deal found 16/12£468

Fri 30/112:24LWS - LHR

1 stop13h 36mKLM

Fri 6/217:50LHR - LWS

2 stops35h 09mKLM

Deal found 16/12£469

Fri 30/107:05LWS - LHR

2 stops20h 35mDelta

Fri 6/206:30LHR - LWS

2 stops22h 29mDelta

Deal found 16/12£473

Fri 30/114:40IDA - LHR

2 stops22h 55mUnited Airlines

Tue 3/216:40LHR - IDA

2 stops48h 16mUnited Airlines

Deal found 14/12£480

One-way flights from Idaho to Heathrow
Search for one-way flight options from Idaho to Heathrow. Find affordable one-way fares based on user searches. Data last updated 17 December 2025.

Fri 3/413:43GEG - LHR

2 stops58h 52mAir Canada

Deal found 14/12£359

Thu 2/406:00BOI - LHR

3 stops19h 00mMultiple Airlines

Deal found 15/12£360

Wed 31/1207:15LWS - LHR

1 stop19h 15mDelta

Deal found 15/12£387

Thu 2/407:42BOI - LHR

1 stop16h 03mLufthansa

Deal found 15/12£389

Fri 3/413:43GEG - LHR

1 stop14h 37mLufthansa

Deal found 14/12£389

Thu 2/413:47BOI - LHR

2 stops16h 23mVirgin Atlantic

Deal found 15/12£390

Wed 27/513:40GEG - LHR

3 stops35h 15mMultiple Airlines

Deal found 14/12£447

Fri 3/411:35GEG - LHR

3 stops36h 20mMultiple Airlines

Deal found 14/12£456

Mon 22/1221:20IDA - LHR

3 stops52h 05mMultiple Airlines

Deal found 17/12£487

Wed 27/507:02GEG - LHR

1 stop16h 23mLufthansa

Deal found 14/12£556

Mon 22/1213:10IDA - LHR

1 stop13h 50mKLM

Deal found 17/12£780

Find flight deals from Idaho to Heathrow

Round-trip from	£445
One-way from	£359
Popular in	June
Cheapest in	October
Average price	£708

Lufthansa
4/3-9/3
3 total stops
41h 38m total
Idaho to London

Search Deals

Air Canada
3/4
2 total stops
58h 52m total
Idaho to London

Search Deals

Highest demand for flights based on searches. 23% potential increase in price (£153 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£28 potential savings vs. average return price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Idaho to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 25/2

07:00-07:25

1 stop16h 25m

London Heathrow

Wed 11/3

06:35-21:03

2 stops21h 28m

£445

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 4/3

12:38-12:00

1 stop15h 22m

London Heathrow

Wed 11/3

06:35-21:03

2 stops21h 28m

£445

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 4/3

13:44-19:35

2 stops21h 51m

London Heathrow

Mon 9/3

07:40-21:18

2 stops20h 38m

£451

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 17/2

07:00-07:25

1 stop16h 25m

London Heathrow

Thu 26/2

07:30-21:17

2 stops21h 47m

£453

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 24/2

12:38-12:00

1 stop15h 22m

London Heathrow

Tue 10/3

09:30-21:18

2 stops18h 48m

£453

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

17:24-06:40

2 stops30h 16m

London Heathrow

Thu 26/2

11:10-23:48

2 stops19h 38m

£462

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Thu 15/1

06:53-11:50

2 stops20h 57m

London Heathrow

Thu 22/1

06:35-19:16

2 stops20h 41m

£462

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 14/1

05:15-10:00

1 stop20h 45m

London Heathrow

Sat 31/1

06:30-15:00

2 stops16h 30m

£463

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 15/1

14:40-09:40

1 stop12h 00m

London Heathrow

Wed 28/1

06:35-09:56

2 stops34h 21m

£463

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 30/1

13:15-11:40

2 stops15h 25m

London Heathrow

Fri 6/2

06:20-17:51

2 stops18h 31m

£468

Flights are sorted by cheapest return flights first.

Deals found on 14/12

Showing 1-10 of 40 results

Best time to book a flight from Idaho to Heathrow

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

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

Currently, July is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £450). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £809). 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 ID to LHR?

It’s optimal to fly from Idaho to London Heathrow Airport in the evening. By choosing this option you can save up to 59% on the cost of your flight, compared to a flight in the morning.

Related info for your journey

How long is the flight from Idaho to London Heathrow Airport?
Airlines like Lufthansa, United Airlines, and KLM fly from Idaho to London Heathrow Airport in about 13h 36m. The time it takes to get you to your destination can typically vary by up to 16h 40m. There are 4697 mi between Idaho and London Heathrow Airport. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the most popular routes from Idaho to London Heathrow Airport?
The most popular route from Idaho to London Heathrow Airport is Boise Air Term. Gowen Fld - London Heathrow. You may also consider Spokane - London Heathrow or Idaho Falls Fanning Field - London Heathrow.
Can I find deals for flights from Idaho to Heathrow that include hotel bookings?
Yes. In addition to deals on Idaho to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Idaho to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Heathrow.
Can I find deals for business class flights from Idaho to Heathrow?
Yes. Cheapflights offers flight deals from Idaho to Heathrow 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 Idaho to London Heathrow Airport?
Currently, July is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £450). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £809). 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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Chichester

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Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Idaho to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights helps you find that perfect flight to Heathrow from Idaho 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 Idaho to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Idaho? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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Not ready to book yet? You can track prices for flights from Idaho to Heathrow on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Cheap flights from Idaho to London Heathrow Airport from £359

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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Idaho to Heathrow

Cheapest flights from Idaho to HeathrowExplore the most affordable flight options available from Idaho to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2025.

Explore the most affordable flight options available from Idaho to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2025.

Find flight deals from Idaho to Heathrow

Keep the following information in mind while searching for Idaho to Heathrow flight deals. Data was last updated 17 December 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Idaho to London Heathrow Airport that are best for you.

Best time to book a flight from Idaho to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Idaho with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Idaho to London Heathrow Airport

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

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

Find hourly flight availability from Idaho to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 December 2025.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Heathrow. 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 Idaho to London Heathrow Airport?

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

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

How can I find direct flights from Idaho to Heathrow?

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

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

Travelling to a place near London Heathrow Airport?

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.

Alternative routes for Idaho to Heathrow

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

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 Idaho to Heathrow?

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

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

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

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Cheapest flights from Idaho to Heathrow
Explore the most affordable flight options available from Idaho to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 December 2025.