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

Airlines like United Airlines, Lufthansa, and KLM fly from Idaho to London Heathrow Airport in about 12h 03m. The time it takes to get you to your destination can typically vary by up to 3h 57m. There are 4829 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.

£342+ Flights from Idaho to London Heathrow Airport

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

Airfare is below average for this route at the moment. Idaho to London Heathrow Airport flights typically cost between £777 and £1,359 in January. The cheapest return flight price found within the last 3 days was £443 on United Airlines (13 Jan-27 Jan).

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 9 December 2025.

Tue 16/1209:40BOI - LHR

2 stops18h 10mUnited Airlines

Wed 14/110:05LHR - BOI

1 stop20h 43mUnited Airlines

Deal found 8/12£597

Sun 21/1205:05GEG - LHR

2 stops18h 05mUnited Airlines

Fri 2/106:35LHR - GEG

2 stops22h 56mUnited Airlines

Deal found 7/12£830

Tue 16/1206:20BOI - LHR

3 stops19h 10mMultiple Airlines

Wed 14/113:25LHR - BOI

2 stops27h 41mMultiple Airlines

Deal found 8/12£861

Fri 26/1206:00GEG - LHR

1 stop22h 00mUnited Airlines

Tue 6/113:25LHR - GEG

2 stops30h 14mUnited Airlines

Deal found 8/12£868

Fri 26/1223:59GEG - LHR

2 stops23h 11mMultiple Airlines

Tue 6/120:15LHR - GEG

2 stops33h 07mMultiple Airlines

Deal found 7/12£970

Mon 15/1214:49BOI - LHR

1 stop11h 51mLufthansa

Mon 29/1206:35LHR - BOI

2 stops18h 28mLufthansa

Deal found 8/12£991

Tue 16/1214:49BOI - LHR

1 stop11h 51mLufthansa

Wed 14/106:30LHR - BOI

2 stops18h 37mLufthansa

Deal found 6/12£996

Mon 15/1212:16BOI - LHR

1 stop15h 59mLufthansa

Sun 28/1220:15LHR - BOI

2 stops32h 16mLufthansa

Deal found 8/12£998

Fri 26/1206:00GEG - LHR

1 stop22h 00mLufthansa

Tue 6/111:35LHR - GEG

1 stop17h 47mLufthansa

Deal found 9/12£1,011

Mon 15/1206:20BOI - LHR

2 stops17h 50mMultiple Airlines

Mon 29/1206:35LHR - BOI

2 stops21h 56mMultiple Airlines

Deal found 8/12£1,061

Tue 16/1211:10BOI - LHR

2 stops17h 30mDelta

Wed 14/106:30LHR - BOI

2 stops16h 47mDelta

Deal found 6/12£1,065

Sat 27/1206:34BOI - LHR

1 stop22h 26mUnited Airlines

Mon 5/115:10LHR - BOI

2 stops28h 29mUnited Airlines

Deal found 7/12£1,072

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 9 December 2025.

Tue 13/114:37BOI - LHR

1 stop12h 03mUnited Airlines

Tue 27/118:00LHR - BOI

2 stops35h 57mUnited Airlines

Deal found 8/12£443

Thu 15/110:40JAC - LHR

1 stop16h 00mLufthansa

Thu 29/120:15LHR - JAC

2 stops31h 27mLufthansa

Deal found 8/12£455

Mon 12/113:15IDA - LHR

1 stop13h 45mKLM

Tue 20/117:50LHR - IDA

2 stops31h 01mKLM

Deal found 7/12£472

Wed 21/110:39BOI - LHR

1 stop16h 51mMultiple Airlines

Fri 30/106:30LHR - BOI

2 stops18h 58mMultiple Airlines

Deal found 8/12£472

Wed 4/313:20GEG - LHR

1 stop12h 40mDelta

Wed 11/306:30LHR - GEG

2 stops20h 29mDelta

Deal found 9/12£472

Thu 8/110:51IDA - LHR

2 stops16h 34mUnited Airlines

Wed 21/106:35LHR - IDA

2 stops34h 21mUnited Airlines

Deal found 9/12£464

Wed 14/110:40JAC - LHR

1 stop16h 00mLufthansa

Fri 30/107:40LHR - JAC

2 stops20h 02mLufthansa

Deal found 8/12£471

Wed 18/213:10IDA - LHR

1 stop13h 50mKLM

Wed 25/217:50LHR - IDA

2 stops30h 54mKLM

Deal found 7/12£472

Wed 25/207:10GEG - LHR

1 stop19h 20mDelta

Wed 11/306:30LHR - GEG

2 stops20h 29mDelta

Deal found 9/12£472

Thu 21/506:25LWS - LHR

1 stop23h 50mAir France

Tue 2/611:20LHR - LWS

1 stop17h 45mAir France

Deal found 7/12£954

Tue 17/214:40BOI - LHR

2 stops33h 00mUnited Airlines

Thu 26/211:10LHR - BOI

2 stops19h 38mUnited Airlines

Deal found 8/12£464

Wed 14/107:20JAC - LHR

1 stop19h 40mKLM

Thu 29/120:25LHR - JAC

2 stops29h 41mKLM

Deal found 8/12£472

Wed 14/110:40JAC - LHR

1 stop16h 00mLufthansa

Mon 26/106:35LHR - JAC

2 stops21h 07mLufthansa

Deal found 8/12£475

Tue 17/206:30GEG - LHR

2 stops18h 15mDelta

Wed 25/206:30LHR - GEG

2 stops21h 27mDelta

Deal found 8/12£475

Thu 19/210:45IDA - LHR

1 stop15h 55mUnited Airlines

Thu 26/211:10LHR - IDA

2 stops29h 38mUnited Airlines

Deal found 7/12£471

Wed 14/105:15GEG - LHR

2 stops17h 50mDelta

Sun 18/106:30LHR - GEG

2 stops20h 10mDelta

Deal found 8/12£475

Tue 17/213:10IDA - LHR

2 stops17h 40mKLM

Wed 25/220:25LHR - IDA

2 stops28h 19mKLM

Deal found 7/12£479

Thu 15/110:40JAC - LHR

2 stops38h 15mLufthansa

Tue 27/106:35LHR - JAC

2 stops21h 07mLufthansa

Deal found 8/12£482

Tue 17/214:40IDA - LHR

1 stop12h 00mUnited Airlines

Thu 26/211:10LHR - IDA

2 stops29h 38mUnited Airlines

Deal found 7/12£471

Wed 4/305:00GEG - LHR

2 stops18h 05mDelta

Mon 9/306:30LHR - GEG

2 stops21h 34mDelta

Deal found 9/12£475

Tue 17/207:00GEG - LHR

1 stop16h 25mLufthansa

Wed 25/213:45LHR - GEG

1 stop15h 22mLufthansa

Deal found 8/12£489

Wed 21/108:15BOI - LHR

1 stop16h 40mUnited Airlines

Wed 28/106:35LHR - BOI

2 stops22h 17mUnited Airlines

Deal found 7/12£471

Fri 20/213:10IDA - LHR

1 stop13h 50mDelta

Wed 25/206:20LHR - IDA

2 stops23h 01mDelta

Deal found 7/12£476

Tue 17/207:11BOI - LHR

1 stop23h 19mUnited Airlines

Fri 27/211:10LHR - BOI

2 stops19h 38mUnited Airlines

Deal found 7/12£471

Wed 18/205:25IDA - LHR

1 stop21h 35mDelta

Wed 25/206:20LHR - IDA

2 stops23h 01mDelta

Deal found 7/12£476

Fri 23/111:25GEG - LHR

1 stop15h 50mUnited Airlines

Tue 27/106:35LHR - GEG

2 stops22h 47mUnited Airlines

Deal found 6/12£471

Sun 18/114:40JAC - LHR

1 stop14h 00mDelta

Mon 26/106:20LHR - JAC

2 stops17h 04mDelta

Deal found 8/12£476

Mon 5/112:24LWS - LHR

1 stop13h 36mKLM

Tue 10/306:30LHR - LWS

2 stops23h 29mKLM

Deal found 9/12£690

Thu 15/114:40IDA - LHR

1 stop12h 00mUnited Airlines

Mon 19/113:50LHR - IDA

2 stops54h 40mUnited Airlines

Deal found 6/12£479

Wed 18/205:25IDA - LHR

3 stops20h 35mDelta

Thu 26/206:20LHR - IDA

2 stops23h 01mDelta

Deal found 7/12£479

Last-minute flights from Idaho to Heathrow
Discover last-minute flight deals from Idaho to Heathrow. Data last updated 9 December 2025 and is based on user searches.

Thu 8/113:40BOI - LHR

1 stop13h 50mVirgin Atlantic

Wed 21/111:45LHR - BOI

2 stops39h 27mVirgin Atlantic

Deal found 7/12£459

Thu 8/110:51IDA - LHR

2 stops16h 34mUnited Airlines

Wed 21/106:35LHR - IDA

2 stops34h 21mUnited Airlines

Deal found 9/12£464

Thu 8/117:16BOI - LHR

2 stops30h 54mAir Canada

Wed 21/114:30LHR - BOI

2 stops32h 40mAir Canada

Deal found 7/12£469

Mon 12/113:15IDA - LHR

1 stop13h 45mKLM

Tue 20/117:50LHR - IDA

2 stops31h 01mKLM

Deal found 7/12£472

Tue 13/114:37BOI - LHR

1 stop12h 03mUnited Airlines

Tue 27/118:00LHR - BOI

2 stops35h 57mUnited Airlines

Deal found 8/12£443

Tue 13/114:37BOI - LHR

2 stops33h 33mAir Canada

Tue 27/113:25LHR - BOI

2 stops40h 32mAir Canada

Deal found 8/12£447

Wed 14/110:40JAC - LHR

1 stop16h 00mLufthansa

Fri 30/107:40LHR - JAC

2 stops20h 02mLufthansa

Deal found 8/12£471

Thu 15/110:40JAC - LHR

1 stop16h 00mLufthansa

Thu 29/120:15LHR - JAC

2 stops31h 27mLufthansa

Deal found 8/12£455

Thu 15/106:53GEG - LHR

1 stop21h 07mLufthansa

Tue 20/119:30LHR - GEG

2 stops31h 46mLufthansa

Deal found 8/12£469

Fri 16/112:58JAC - LHR

1 stop14h 02mKLM

Fri 30/120:25LHR - JAC

2 stops26h 59mKLM

Deal found 8/12£472

Thu 22/106:53GEG - LHR

2 stops20h 57mMultiple Airlines

Thu 29/106:35LHR - GEG

2 stops20h 41mMultiple Airlines

Deal found 8/12£464

Fri 23/111:25GEG - LHR

1 stop15h 50mUnited Airlines

Tue 27/106:35LHR - GEG

2 stops22h 47mUnited Airlines

Deal found 8/12£471

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 9 December 2025.

Wed 4/312:38GEG - LHR

2 stops16h 52mLufthansa

Deal found 7/12£342

Wed 15/406:00BOI - LHR

3 stops22h 55mMultiple Airlines

Deal found 8/12£351

Sun 15/305:00BOI - LHR

2 stops20h 10mAir Canada

Deal found 8/12£354

Sun 15/307:30BOI - LHR

1 stop21h 00mDelta

Deal found 8/12£355

Mon 2/307:00GEG - LHR

1 stop14h 55mUnited Airlines

Deal found 7/12£355

Wed 4/307:00GEG - LHR

3 stops18h 20mAir Canada

Deal found 7/12£359

Sat 7/314:05GEG - LHR

1 stop33h 00mDelta

Deal found 7/12£366

Sun 1/305:55GEG - LHR

3 stops19h 05mDelta

Deal found 7/12£377

Sun 15/313:25BOI - LHR

3 stops41h 15mMultiple Airlines

Deal found 8/12£386

Wed 31/1207:15LWS - LHR

1 stop19h 15mDelta

Deal found 8/12£389

Thu 5/307:02GEG - LHR

1 stop20h 58mLufthansa

Deal found 7/12£392

Fri 6/305:00GEG - LHR

2 stops17h 20mDelta

Deal found 7/12£392

Find flight deals from Idaho to Heathrow

Round-trip from	£443
One-way from	£342
Popular in	June
Cheapest in	October
Average price	£712

United Airlines
13/1-27/1
3 total stops
48h 00m total
Idaho to London

Search Deals

Lufthansa
4/3
2 total stops
16h 52m total
Idaho to London

Search Deals

Highest demand for flights based on searches. 22% potential increase in price (£153 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£27 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

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 13/1

14:37-09:40

1 stop12h 03m

London Heathrow

Tue 27/1

18:00-22:57

2 stops35h 57m

£443

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Thu 15/1

10:40-09:40

1 stop16h 00m

London Heathrow

Thu 29/1

20:15-20:42

2 stops31h 27m

£455

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 8/1

10:51-10:25

2 stops16h 34m

London Heathrow

Wed 21/1

06:35-09:56

2 stops34h 21m

£464

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

14:40-06:40

2 stops33h 00m

London Heathrow

Thu 26/2

11:10-23:48

2 stops19h 38m

£464

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 14/1

10:40-09:40

1 stop16h 00m

London Heathrow

Fri 30/1

07:40-20:42

2 stops20h 02m

£471

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 19/2

10:45-09:40

1 stop15h 55m

London Heathrow

Thu 26/2

11:10-09:48

2 stops29h 38m

£471

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 17/2

14:40-09:40

1 stop12h 00m

London Heathrow

Thu 26/2

11:10-09:48

2 stops29h 38m

£471

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 21/1

08:15-07:55

1 stop16h 40m

London Heathrow

Wed 28/1

06:35-21:52

2 stops22h 17m

£471

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

07:11-13:30

1 stop23h 19m

London Heathrow

Fri 27/2

11:10-23:48

2 stops19h 38m

£471

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Fri 23/1

11:25-11:15

1 stop15h 50m

London Heathrow

Tue 27/1

06:35-21:22

2 stops22h 47m

£471

Flights are sorted by cheapest return flights first.

Deals found on 7/12

Showing 1-10 of 56 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 £451). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £814). 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.

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

Related info for your journey

How long is the flight from Idaho to London Heathrow Airport?
Airlines like United Airlines, Lufthansa, and KLM fly from Idaho to London Heathrow Airport in about 12h 03m. The time it takes to get you to your destination can typically vary by up to 3h 57m. There are 4829 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 £451). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £814). 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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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!

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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 £342

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 4/3. 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 9 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 9 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 9 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 9 December 2025.

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

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?

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Alternative routes for Idaho to Heathrow

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

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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 9 December 2025.