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

One-way options have recently been found by users for as low as £338 on United Airlines. Other airlines that offer cheap prices include Air Canada from £341 and Virgin Atlantic from £397 one-way.

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 Spokane - London Heathrow. You may also consider Boise Air Term. Gowen Fld - London Heathrow or Jackson Hole - London Heathrow.

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

To save on the cost of your flight from Idaho to London Heathrow Airport, book at least 36 days before your planned departure. Booking around this time can save you about 27% on the cost of this flight compared to booking a flight leaving this week. We have found prices from £529 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £633.

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

October is one of the best times of the year to fly to London Heathrow Airport from Idaho. Prices for October average £673 per person but you can even find prices for as low as £440. The most expensive prices can be found in the month of June. Opting for a October flight can save you 53% on your journey compared to booking in June

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.

£250+ Flights from Idaho to London Heathrow Airport

Cheap flight deals from Idaho to Heathrow

Round-trip from	£521
One-way from	£250
Popular in	June
Cheapest in	October
Average price	£873

Scandinavian Airlines
4/11-18/11
5 total stops
46h 54m total
Idaho to London

Search Deals

15/9
2 total stops
17h 33m total
Idaho to London

Search Deals

Highest demand for flights based on searches. 22% potential increase in price (£142 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£25 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Find flight deals from Idaho to Heathrow

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 1 July 2025.

Tue 4/1115:05BOI - LHR

3 stops23h 30mScandinavian Airlines

Tue 18/1106:40LHR - BOI

2 stops23h 24mScandinavian Airlines

Deal found 30/6£521

Wed 13/813:00BOI - LHR

1 stop15h 20mMultiple Airlines

Wed 20/806:15LHR - BOI

2 stops16h 39mMultiple Airlines

Deal found 29/6£532

Mon 25/808:20BOI - LHR

1 stop17h 00mUnited Airlines

Tue 2/914:05LHR - BOI

2 stops28h 26mUnited Airlines

Deal found 29/6£533

Wed 1/1016:00GEG - LHR

1 stop12h 20mUnited Airlines

Tue 7/1014:05LHR - GEG

2 stops41h 10mUnited Airlines

Deal found 30/6£533

Sun 14/906:59BOI - LHR

1 stop20h 51mIberia

Wed 1/1006:30LHR - BOI

2 stops22h 18mIberia

Deal found 29/6£534

Wed 12/1105:10GEG - LHR

2 stops18h 00mAir Canada

Wed 3/1213:00LHR - GEG

2 stops31h 45mAir Canada

Deal found 30/6£537

Fri 15/806:05GEG - LHR

2 stops19h 45mMultiple Airlines

Fri 22/813:35LHR - GEG

1 stop16h 50mMultiple Airlines

Deal found 1/7£556

Tue 28/1013:47GEG - LHR

1 stop12h 53mLufthansa

Thu 6/1107:40LHR - GEG

2 stops21h 05mLufthansa

Deal found 1/7£563

Thu 14/814:38IDA - LHR

1 stop12h 02mUnited Airlines

Thu 21/806:30LHR - IDA

2 stops23h 18mUnited Airlines

Deal found 30/6£577

Fri 19/913:07BOI - LHR

1 stop16h 08mAmerican Airlines

Fri 26/910:30LHR - BOI

1 stop18h 18mAmerican Airlines

Deal found 1/7£585

Sat 13/912:35GEG - LHR

1 stop33h 50mIberia

Sun 21/912:00LHR - GEG

1 stop18h 35mIberia

Deal found 30/6£590

Wed 17/905:00BOI - LHR

2 stops23h 50mAir Canada

Fri 3/1017:40LHR - BOI

2 stops32h 07mAir Canada

Deal found 30/6£592

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 1 July 2025.

Tue 4/1115:05BOI - LHR

3 stops23h 30mScandinavian Airlines

Tue 18/1106:40LHR - BOI

2 stops23h 24mScandinavian Airlines

Deal found 30/6£521

Wed 13/813:00BOI - LHR

1 stop15h 20mMultiple Airlines

Wed 20/806:15LHR - BOI

2 stops16h 39mMultiple Airlines

Deal found 29/6£532

Mon 25/808:20BOI - LHR

1 stop17h 00mUnited Airlines

Tue 2/914:05LHR - BOI

2 stops28h 26mUnited Airlines

Deal found 29/6£533

Sun 14/906:59BOI - LHR

1 stop20h 51mIberia

Wed 1/1006:30LHR - BOI

2 stops22h 18mIberia

Deal found 29/6£534

Wed 12/1105:10GEG - LHR

2 stops18h 00mAir Canada

Wed 3/1213:00LHR - GEG

2 stops31h 45mAir Canada

Deal found 30/6£537

Thu 25/911:40JAC - LHR

2 stops18h 50mDelta

Sat 4/1009:20LHR - JAC

1 stop17h 29mDelta

Deal found 29/6£597

Wed 17/906:59BOI - LHR

1 stop16h 26mFinnair

Fri 3/1012:00LHR - BOI

1 stop16h 48mFinnair

Deal found 30/6£599

Mon 15/912:54IDA - LHR

1 stop13h 16mAmerican Airlines

Mon 22/908:50LHR - IDA

2 stops19h 35mAmerican Airlines

Deal found 29/6£612

Fri 1/815:38GEG - LHR

1 stop14h 37mKLM

Wed 6/812:45LHR - GEG

1 stop18h 27mKLM

Deal found 29/6£680

Wed 1/1016:00GEG - LHR

1 stop12h 20mUnited Airlines

Tue 7/1014:05LHR - GEG

2 stops41h 10mUnited Airlines

Deal found 30/6£533

Thu 14/806:05GEG - LHR

2 stops25h 35mMultiple Airlines

Thu 21/813:35LHR - GEG

1 stop16h 50mMultiple Airlines

Deal found 29/6£556

Sat 13/912:35GEG - LHR

1 stop33h 50mIberia

Sun 21/912:00LHR - GEG

1 stop18h 35mIberia

Deal found 30/6£590

Last-minute flights from Idaho to Heathrow
Discover last-minute flight deals from Idaho to Heathrow. Data last updated 1 July 2025 and is based on user searches.

Sun 6/713:00BOI - LHR

2 stops15h 55mIcelandair

Sun 13/721:25LHR - BOI

2 stops32h 21mIcelandair

Deal found 30/6£3,019

Sun 6/708:18BOI - LHR

1 stop18h 52mMultiple Airlines

Sun 13/721:25LHR - BOI

2 stops51h 46mMultiple Airlines

Deal found 30/6£6,531

Sun 6/710:45BOI - LHR

1 stop18h 35mLufthansa

Sun 13/711:05LHR - BOI

1 stop18h 47mLufthansa

Deal found 30/6£6,818

Mon 7/720:48GEG - LHR

2 stops39h 32mIcelandair

Sun 27/721:25LHR - GEG

2 stops25h 15mIcelandair

Deal found 30/6£971

Mon 7/707:25GEG - LHR

1 stop16h 00mUnited Airlines

Sun 27/714:05LHR - GEG

2 stops38h 58mUnited Airlines

Deal found 29/6£1,030

Mon 7/713:37GEG - LHR

1 stop14h 43mLufthansa

Sun 27/716:25LHR - GEG

2 stops32h 58mLufthansa

Deal found 30/6£1,031

Mon 7/709:40GEG - LHR

1 stop16h 10mDelta

Sun 27/713:25LHR - GEG

1 stop18h 39mDelta

Deal found 30/6£1,046

Mon 7/714:22GEG - LHR

1 stop14h 48mKLM

Mon 14/712:25LHR - GEG

1 stop18h 47mKLM

Deal found 30/6£1,188

Mon 7/711:15GEG - LHR

3 stops22h 25mScandinavian Airlines

Sun 27/719:30LHR - GEG

2 stops29h 25mScandinavian Airlines

Deal found 30/6£1,429

Mon 7/711:37GEG - LHR

3 stops25h 23mMultiple Airlines

Mon 14/706:40LHR - GEG

3 stops21h 06mMultiple Airlines

Deal found 30/6£2,163

Thu 10/718:53JAC - LHR

2 stops18h 07mDelta

Sat 19/710:55LHR - JAC

1 stop16h 54mDelta

Deal found 30/6£736

Thu 10/708:30JAC - LHR

1 stop19h 40mKLM

Sat 19/710:55LHR - JAC

1 stop16h 54mKLM

Deal found 30/6£1,121

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 1 July 2025.

Mon 15/911:22BOI - LHR

2 stops17h 33mMultiple Airlines

Deal found 29/6£250

Wed 12/1106:20BOI - LHR

1 stop22h 40mUnited Airlines

Deal found 30/6£338

Mon 21/710:50BOI - LHR

2 stops19h 30mAir Canada

Deal found 30/6£341

Wed 13/807:25GEG - LHR

2 stops19h 45mUnited Airlines

Deal found 29/6£341

Fri 29/807:30JAC - LHR

2 stops15h 55mVirgin Atlantic

Deal found 29/6£397

Fri 29/812:39JAC - LHR

3 stops26h 56mMultiple Airlines

Deal found 29/6£530

Sun 12/1007:30BOI - LHR

1 stop15h 55mFinnair

Deal found 29/6£1,824

Fri 12/911:29GEG - LHR

3 stops20h 56mScandinavian Airlines

Deal found 30/6£2,643

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 4/11

15:05-21:35

3 stops23h 30m

London Heathrow

Tue 18/11

06:40-23:04

2 stops23h 24m

£521

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 13/8

13:00-11:20

1 stop15h 20m

London Heathrow

Wed 20/8

06:15-15:54

2 stops16h 39m

£532

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Mon 25/8

08:20-08:20

1 stop17h 00m

London Heathrow

Tue 2/9

14:05-11:31

2 stops28h 26m

£533

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 1/10

16:00-12:20

1 stop12h 20m

London Heathrow

Tue 7/10

14:05-23:15

2 stops41h 10m

£533

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 14/9

06:59-10:50

1 stop20h 51m

London Heathrow

Wed 1/10

06:30-21:48

2 stops22h 18m

£534

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/11

05:10-07:10

2 stops18h 00m

London Heathrow

Wed 3/12

13:00-12:45

2 stops31h 45m

£537

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Thu 14/8

06:05-15:40

2 stops25h 35m

London Heathrow

Thu 21/8

13:35-22:25

1 stop16h 50m

£556

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 14/8

14:38-09:40

1 stop12h 02m

London Heathrow

Thu 21/8

06:30-22:48

2 stops23h 18m

£577

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sat 13/9

12:35-06:25

1 stop33h 50m

London Heathrow

Sun 21/9

12:00-22:35

1 stop18h 35m

£590

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 17/9

05:00-11:50

2 stops23h 50m

London Heathrow

Fri 3/10

17:40-18:47

2 stops32h 07m

£592

Flights are sorted by cheapest return flights first.

Deals found on 29/6

Showing 1-10 of 29 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, January is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £112). Flying from Idaho to London Heathrow Airport in August is currently the most expensive (average of £164). 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?

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

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Delta, KLM, andFinnair from Idaho to London Heathrow Airport by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very Good

7,973 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,366 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Finnair

7.6

Good

1,301 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,852 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Virgin Atlantic

7.4

Good

654 reviews

Delta

8.0

Very Good

7,973 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines to fly from Idaho to London Heathrow Airport one-way?
One-way options have recently been found by users for as low as £338 on United Airlines. Other airlines that offer cheap prices include Air Canada from £341 and Virgin Atlantic from £397 one-way.
What are the most popular routes from Idaho to London Heathrow Airport?
The most popular route from Idaho to London Heathrow Airport is Spokane - London Heathrow. You may also consider Boise Air Term. Gowen Fld - London Heathrow or Jackson Hole - 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, January is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £112). Flying from Idaho to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Croydon

Milton Keynes

Hounslow

Deal

Northampton

Gatwick

Slough

Luton

Wembley

Crawley

Eastbourne

Ilford

Watford

Southend-on-Sea

Folkestone

Ipswich

Winchester

Hayes

Maidstone

Swindon

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Idaho to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£443	Average£875	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights

Fly with Cheapflights

How does Cheapflights help users find flights from Idaho to Heathrow?

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.

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

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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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Idaho to London Heathrow Airport from £250

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Idaho to Heathrow

Keep the following information in mind while searching for Idaho to Heathrow flight deals. Data was last updated 1 July 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 1 July 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 1 July 2025.

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 1 July 2025.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Delta, KLM, andFinnair from Idaho to London Heathrow Airport by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

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

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 Idaho?

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.

Top airline flying from Idaho to Heathrow

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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Travel Smart

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 1 July 2025.