How long is the flight from Idaho to London?

A quick flight from Idaho to London can take about 13h 21m. Scandinavian Airlines provides one of the quickest options available for as low as $616. Idaho and London are separated by a distance of 4829 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines to fly from Idaho to London one-way?

The cheapest airlines for a one-way flight from Idaho to London are American Airlines ($449), United Airlines ($459), and Air Canada ($459).

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

If weather is an important factor for your trip to London, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

What are the most popular routes from Idaho to London?

The most popular flight routes from Idaho to London are Spokane - London Heathrow, Spokane - London Gatwick and Boise Air Term. Gowen Fld - London Heathrow.

What are the most popular airlines that fly from Idaho to London?

The most popular airlines flying from Idaho to London are American Airlines, Delta and KLM. Something to consider prior to booking your flight.

How far in advance should I book a flight from Idaho to London?

To save on the cost of your flight from Idaho to London, book at least 54 days before your planned departure. Booking around this time can save you about 42% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $627 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $868.

What is the cheapest month to fly from Idaho to London?

Our data shows that October tends to be the cheapest month to fly to London from Idaho. Users have commonly found prices around $926 for the month, but tickets can be as low as $548. Due to multiple factors, prepare for potentially higher prices in June.

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

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

How can I find direct flights from Idaho to London?

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

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

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

$296+ Cheap Flights from Idaho to London

Q: How much does it cost to fly round-trip from Idaho to London?

Airfare is below average for this route at the moment. Idaho to London flights typically cost between $769 and $897 in October. The cheapest round-trip price found within the last 3 days was $597 on Virgin Atlantic (Oct 29-Nov 5).

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Cheap flight deals from Idaho to London

Round-trip from	$597 (Netflights)
One-way from	$296 (Trip.com)
Popular in	June
Cheapest in	October
Average price	$796

From Idaho to London (LON)

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One-way flight from Idaho to London (LON)

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Highest demand for flights based on searches. 23% potential increase in price ($278 potential increase over avg. RT price).

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Cheapest flight prices on average. 5% potential price decrease ($49 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Find flight deals from Idaho to London

Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Wed 10/291:39 pmBOI - LHR

1 stop13h 21mVirgin Atlantic

Wed 11/511:20 amLHR - BOI

1 stop18h 32mVirgin Atlantic

Deal found 9/13

$597

Thu 11/133:54 pmBOI - LHR

2 stops22h 46mScandinavian Airlines

Fri 12/56:40 amLHR - BOI

2 stops22h 56mScandinavian Airlines

Deal found 9/14

$604

Tue 9/235:39 pmBOI - LHR

1 stop11h 41mUnited Airlines

Wed 10/19:30 amLHR - BOI

2 stops33h 09mUnited Airlines

Deal found 9/15

$608

Wed 10/291:39 pmBOI - LHR

1 stop13h 21mKLM

Wed 11/56:30 amLHR - BOI

2 stops16h 36mKLM

Deal found 9/13

$616

Wed 10/292:31 pmBOI - LHR

2 stops14h 44mUnited Airlines

Wed 11/511:10 amLHR - BOI

2 stops18h 35mUnited Airlines

Deal found 9/13

$621

Wed 11/127:30 amBOI - LHR

1 stop20h 00mDelta

Thu 11/208:55 amLHR - BOI

2 stops20h 30mDelta

Deal found 9/14

$623

Tue 10/2812:51 pmGEG - LHR

1 stop15h 49mMultiple Airlines

Thu 11/66:20 amLHR - GEG

2 stops16h 37mMultiple Airlines

Deal found 9/15

$623

Tue 10/142:00 pmBOI - LHR

1 stop14h 20mDelta

Tue 10/216:30 amLHR - BOI

2 stops20h 46mDelta

Deal found 9/14

$624

Wed 11/122:31 pmBOI - LHR

1 stop12h 09mUnited Airlines

Mon 11/174:40 pmLHR - BOI

2 stops32h 29mUnited Airlines

Deal found 9/15

$626

Tue 9/2311:00 amBOI - LHR

2 stops19h 10mDelta

Wed 10/111:30 amLHR - BOI

2 stops19h 27mDelta

Deal found 9/15

$627

Wed 11/59:45 amGEG - LHR

2 stops15h 00mDelta

Wed 11/196:20 amLHR - GEG

2 stops17h 28mDelta

Deal found 9/15

$627

Tue 10/285:45 amGEG - LHR

2 stops18h 05mVirgin Atlantic

Tue 11/46:20 amLHR - GEG

2 stops20h 38mVirgin Atlantic

Deal found 9/13

$628

Best flights from Idaho to London
Discover carefully curated flight deals from Idaho to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

Thu 11/133:54 pmBOI - LHR

2 stops22h 46mScandinavian Airlines

Fri 12/56:40 amLHR - BOI

2 stops22h 56mScandinavian Airlines

Deal found 9/14

$604

Wed 10/291:39 pmBOI - LHR

1 stop13h 21mKLM

Wed 11/56:30 amLHR - BOI

2 stops16h 36mKLM

Deal found 9/13

$616

Wed 10/292:31 pmBOI - LHR

2 stops14h 44mUnited Airlines

Wed 11/511:10 amLHR - BOI

2 stops18h 35mUnited Airlines

Deal found 9/13

$621

Wed 11/55:45 amGEG - LHR

1 stop17h 20mDelta

Wed 11/196:20 amLHR - GEG

2 stops24h 30mDelta

Deal found 9/13

$623

Tue 11/45:45 amGEG - LHR

1 stop17h 20mMultiple Airlines

Tue 11/116:20 amLHR - GEG

2 stops16h 34mMultiple Airlines

Deal found 9/13

$623

Tue 10/147:05 pmBOI - LHR

2 stops28h 25mAir Canada

Tue 10/215:40 pmLHR - BOI

2 stops27h 03mAir Canada

Deal found 9/14

$629

Tue 10/142:00 pmBOI - LHR

1 stop17h 15mVirgin Atlantic

Tue 10/2112:45 pmLHR - BOI

2 stops18h 09mVirgin Atlantic

Deal found 9/14

$635

Wed 11/122:31 pmBOI - LCY

2 stops19h 09mLufthansa

Thu 11/209:40 amLCY - BOI

2 stops18h 41mLufthansa

Deal found 9/14

$717

Thu 9/257:44 amJAC - LHR

1 stop15h 41mAmerican Airlines

Sun 10/59:15 amLHR - JAC

1 stop13h 13mAmerican Airlines

Deal found 9/14

$812

Wed 10/2911:43 amBOI - LGW

2 stops17h 12mIcelandair

Wed 11/511:55 amLGW - BOI

2 stops17h 25mIcelandair

Deal found 9/13

$880

Wed 11/122:45 pmGEG - LHR

1 stop18h 05mDelta

Wed 12/36:20 amLHR - GEG

2 stops20h 36mDelta

Deal found 9/13

$623

Wed 11/126:15 amBOI - LHR

1 stop20h 25mUnited Airlines

Mon 11/174:40 pmLHR - BOI

2 stops34h 05mUnited Airlines

Deal found 9/14

$626

Last-minute flights from Idaho to London
Discover last-minute flight deals from Idaho to London. Data last updated September 15, 2025 and is based on user searches.

Tue 9/235:39 pmBOI - LHR

1 stop11h 41mUnited Airlines

Wed 10/19:30 amLHR - BOI

2 stops33h 09mUnited Airlines

Deal found 9/15

$608

Tue 9/2311:00 amBOI - LHR

2 stops19h 10mDelta

Wed 10/111:30 amLHR - BOI

2 stops19h 27mDelta

Deal found 9/15

$627

Tue 9/2311:32 amBOI - LHR

1 stop15h 18mKLM

Wed 10/15:25 pmLHR - BOI

1 stop13h 32mKLM

Deal found 9/15

$631

Tue 10/142:00 pmBOI - LHR

1 stop14h 20mDelta

Tue 10/216:30 amLHR - BOI

2 stops20h 46mDelta

Deal found 9/14

$624

Tue 10/147:05 pmBOI - LHR

2 stops28h 25mAir Canada

Tue 10/215:40 pmLHR - BOI

2 stops27h 03mAir Canada

Deal found 9/14

$629

Wed 10/229:22 amGEG - LHR

2 stops16h 53mDelta

Fri 10/316:20 amLHR - GEG

2 stops21h 45mDelta

Deal found 9/13

$627

Tue 10/2812:51 pmGEG - LHR

1 stop15h 49mMultiple Airlines

Thu 11/66:20 amLHR - GEG

2 stops16h 37mMultiple Airlines

Deal found 9/15

$623

Tue 10/285:45 amGEG - LHR

2 stops18h 05mVirgin Atlantic

Tue 11/46:20 amLHR - GEG

2 stops20h 38mVirgin Atlantic

Deal found 9/13

$628

Tue 10/2812:51 pmGEG - LHR

1 stop15h 49mKLM

Thu 11/611:05 amLHR - GEG

1 stop16h 41mKLM

Deal found 9/15

$631

Wed 10/291:39 pmBOI - LHR

1 stop13h 21mVirgin Atlantic

Wed 11/511:20 amLHR - BOI

1 stop18h 32mVirgin Atlantic

Deal found 9/13

$597

Wed 10/291:39 pmBOI - LHR

1 stop13h 21mKLM

Wed 11/56:30 amLHR - BOI

2 stops16h 36mKLM

Deal found 9/13

$616

Wed 10/292:31 pmBOI - LHR

2 stops14h 44mUnited Airlines

Wed 11/511:10 amLHR - BOI

2 stops18h 35mUnited Airlines

Deal found 9/13

$621

One-way flights from Idaho to London
Search for one-way flight options from Idaho to London. Find affordable one-way fares based on user searches. Data last updated September 15, 2025.

Fri 10/247:00 amGEG - LGW

1 stop19h 55mMultiple Airlines

Deal found 9/15

$296

Mon 10/137:40 pmIDA - LHR

3 stops39h 05mMultiple Airlines

Deal found 9/14

$447

Wed 10/2212:33 pmGEG - LHR

1 stop16h 12mAmerican Airlines

Deal found 9/13

$449

Tue 11/255:00 amIDA - LHR

2 stops17h 55mUnited Airlines

Deal found 9/15

$459

Wed 10/227:15 amGEG - LHR

2 stops22h 05mAir Canada

Deal found 9/14

$459

Tue 11/2510:45 amJAC - LHR

2 stops17h 05mUnited Airlines

Deal found 9/15

$463

Fri 11/219:43 pmIDA - LHR

2 stops32h 07mMultiple Airlines

Deal found 9/15

$464

Mon 10/131:15 pmIDA - LHR

2 stops18h 00mKLM

Deal found 9/14

$468

Wed 12/317:15 amLWS - LHR

2 stops19h 00mDelta

Deal found 9/15

$468

Wed 10/227:15 amGEG - LCY

2 stops21h 15mUnited Airlines

Deal found 9/15

$495

Mon 11/310:45 amJAC - LCY

3 stops19h 05mUnited Airlines

Deal found 9/15

$504

Mon 11/310:45 amJAC - LCY

2 stops22h 55mLufthansa

Deal found 9/15

$508

Fly from

Fly to

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Thu 11/13

3:54 pm-9:40 pm

2 stops22h 46m

London Heathrow

Fri 12/5

6:40 am-10:36 pm

2 stops22h 56m

$604

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 10/29

1:39 pm-9:00 am

1 stop13h 21m

London Heathrow

Wed 11/5

6:30 am-4:06 pm

2 stops16h 36m

$616

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 10/29

2:31 pm-11:15 am

2 stops14h 44m

London Heathrow

Wed 11/5

11:10 am-10:45 pm

2 stops18h 35m

$621

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 11/5

5:45 am-7:05 am

1 stop17h 20m

London Heathrow

Wed 11/19

6:20 am-10:50 pm

2 stops24h 30m

$623

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 11/4

5:45 am-7:05 am

1 stop17h 20m

London Heathrow

Tue 11/11

6:20 am-2:54 pm

2 stops16h 34m

$623

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 11/12

2:45 pm-4:50 pm

1 stop18h 05m

London Heathrow

Wed 12/3

6:20 am-6:56 pm

2 stops20h 36m

$623

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 10/22

11:20 am-2:15 pm

1 stop18h 55m

London Heathrow

Fri 10/31

6:20 am-10:34 pm

2 stops23h 14m

$623

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 11/12

6:15 am-9:40 am

1 stop20h 25m

London Heathrow

Mon 11/17

4:40 pm-7:45 pm

2 stops34h 05m

$626

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 11/4

6:10 am-8:45 am

2 stops18h 35m

London Heathrow

Tue 11/11

6:20 am-8:03 pm

2 stops21h 43m

$627

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 10/14

7:05 pm-6:30 am

2 stops28h 25m

London Heathrow

Tue 10/21

5:40 pm-1:43 pm

2 stops27h 03m

$629

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 54 results

...

Best time to book a flight from Idaho to London

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

Estimated round-trip 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

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

Currently, November is the cheapest month in which you can book a flight from Idaho to London (average of $661). Flying from Idaho to London in June is currently the most expensive (average of $1,097). 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 LON?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to London as you normally would.

How much does it cost to fly round-trip from Idaho to London?

Related info for your journey

How long is the flight from Idaho to London?
A quick flight from Idaho to London can take about 13h 21m. Scandinavian Airlines provides one of the quickest options available for as low as $616. Idaho and London are separated by a distance of 4829 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines to fly from Idaho to London one-way?
The cheapest airlines for a one-way flight from Idaho to London are American Airlines ($449), United Airlines ($459), and Air Canada ($459).
What are the most popular routes from Idaho to London?
The most popular flight routes from Idaho to London are Spokane - London Heathrow, Spokane - London Gatwick and Boise Air Term. Gowen Fld - London Heathrow.
Can I find deals for flights from Idaho to London that include hotel bookings?
Yes. In addition to deals on Idaho to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Idaho to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to London.
Can I find deals for business class flights from Idaho to London?
Yes. Cheapflights offers flight deals from Idaho to London 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?
Currently, November is the cheapest month in which you can book a flight from Idaho to London (average of $661). Flying from Idaho to London in June is currently the most expensive (average of $1,097). 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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Hayes

Southend-on-Sea

Harrow

Canterbury

Croydon

Eastleigh

Dartford

Dover

Winchester

Orpington

Gatwick

Borehamwood

Aylesbury

Bedford

Wembley

Folkestone

Chichester

Eastbourne

Sutton

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Top 5 airlines flying from Idaho to London

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest$577	Average$774	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$691	Average$1,138	FlexibilityNo cancel fee	On-timeN/A
Virgin Atlantic	Cheapest$695	Average$977	FlexibilityNo cancel fee	On-time72%
United Airlines	Cheapest$697	Average$977	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$703	Average$865	FlexibilityNo cancel fee	On-time71%

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$296+ Cheap flights from Idaho to London (LON)

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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Idaho to London

Keep the following information in mind while searching for Idaho to London flight deals. Data was last updated September 15, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Idaho to London

Cheapest flights from Idaho to LondonExplore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Idaho to London

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Idaho to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

How much does it cost to fly round-trip from Idaho to London?

Related info for your journey

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

What are the cheapest airlines to fly from Idaho to London one-way?

What are the most popular routes from Idaho to London?

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

How can I find direct flights from Idaho to London?

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

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

Traveling to a place near London?

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Alternative routes for Idaho to London

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Top 5 airlines flying from Idaho to London

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Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.