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 £344 on American Airlines. Other airlines that offer cheap prices include KLM from £378 and Delta from £378 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 Boise Air Term. Gowen Fld - London Heathrow. You may also consider Spokane - London Heathrow or Idaho Falls Fanning Field - 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 £534 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £639.

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 £676 per person but you can even find prices for as low as £444. The most expensive prices can be found in the month of June. Opting for a October flight can save you 54% 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.

£246+ Flights from Idaho to London Heathrow Airport

Cheap flight deals from Idaho to Heathrow

Round-trip from	£517
One-way from	£246
Popular in	June
Cheapest in	October
Average price	£1,043

Scandinavian Airlines
8/10-17/10
4 total stops
40h 09m total
Idaho to London

Search Deals

3/10
2 total stops
22h 20m total
Idaho to London

Search Deals

Highest demand for flights based on searches. 22% potential increase in price (£148 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 June 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 13 June 2025.

Wed 8/1015:05BOI - LHR

2 stops20h 25mScandinavian Airlines

Fri 17/1010:20LHR - BOI

2 stops19h 44mScandinavian Airlines

Deal found 10/6£517

Fri 12/913:00GEG - LHR

2 stops36h 20mScandinavian Airlines

Fri 26/906:40LHR - GEG

2 stops18h 17mScandinavian Airlines

Deal found 12/6£529

Sun 9/1106:20BOI - LHR

2 stops22h 30mAir Canada

Fri 21/1114:30LHR - BOI

2 stops30h 14mAir Canada

Deal found 11/6£536

Tue 19/805:15GEG - LHR

1 stop23h 05mUnited Airlines

Fri 29/809:30LHR - GEG

2 stops33h 57mUnited Airlines

Deal found 11/6£536

Sun 9/1107:21BOI - LHR

1 stop21h 19mIberia

Fri 21/1106:25LHR - BOI

2 stops21h 53mIberia

Deal found 11/6£539

Fri 7/1111:25GEG - LHR

2 stops59h 05mMultiple Airlines

Tue 18/1107:40LHR - GEG

2 stops21h 05mMultiple Airlines

Deal found 11/6£539

Sun 26/1010:45JAC - LHR

1 stop16h 55mUnited Airlines

Thu 6/1118:00LHR - JAC

2 stops33h 37mUnited Airlines

Deal found 11/6£541

Wed 3/910:40BOI - LHR

1 stop16h 00mUnited Airlines

Tue 16/907:25LHR - BOI

2 stops19h 08mUnited Airlines

Deal found 12/6£541

Wed 12/1111:30JAC - LHR

1 stop15h 30mAir France

Thu 20/1106:20LHR - JAC

2 stops17h 02mAir France

Deal found 12/6£546

Sun 3/805:00IDA - LHR

2 stops18h 20mUnited Airlines

Tue 19/814:50LHR - IDA

1 stop13h 04mUnited Airlines

Deal found 12/6£548

Wed 12/1111:30JAC - LHR

2 stops16h 05mMultiple Airlines

Thu 20/1106:20LHR - JAC

2 stops17h 02mMultiple Airlines

Deal found 12/6£549

Sat 13/912:35GEG - LHR

1 stop36h 25mIberia

Tue 23/911:30LHR - GEG

2 stops32h 15mIberia

Deal found 13/6£549

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 13 June 2025.

Wed 8/1015:05BOI - LHR

2 stops20h 25mScandinavian Airlines

Fri 17/1010:20LHR - BOI

2 stops19h 44mScandinavian Airlines

Deal found 10/6£517

Sun 9/1106:20BOI - LHR

2 stops22h 30mAir Canada

Fri 21/1114:30LHR - BOI

2 stops30h 14mAir Canada

Deal found 11/6£536

Tue 19/805:15GEG - LHR

1 stop23h 05mUnited Airlines

Fri 29/809:30LHR - GEG

2 stops33h 57mUnited Airlines

Deal found 11/6£536

Sun 9/1107:21BOI - LHR

1 stop21h 19mIberia

Fri 21/1106:25LHR - BOI

2 stops21h 53mIberia

Deal found 11/6£539

Fri 7/1111:25GEG - LHR

2 stops59h 05mMultiple Airlines

Tue 18/1107:40LHR - GEG

2 stops21h 05mMultiple Airlines

Deal found 11/6£539

Wed 12/1111:30JAC - LHR

1 stop15h 30mAir France

Thu 20/1106:20LHR - JAC

2 stops17h 02mAir France

Deal found 12/6£546

Wed 12/1111:30JAC - LHR

1 stop15h 30mKLM

Thu 20/1110:45LHR - JAC

1 stop17h 18mKLM

Deal found 12/6£552

Sun 23/1114:31BOI - LHR

2 stops24h 49mLufthansa

Tue 2/1220:15LHR - BOI

2 stops32h 01mLufthansa

Deal found 11/6£567

Sun 3/815:43BOI - LHR

1 stop18h 32mDelta

Tue 19/811:30LHR - BOI

2 stops18h 27mDelta

Deal found 11/6£583

Fri 1/815:35BOI - LHR

1 stop14h 10mFinnair

Tue 19/810:30LHR - BOI

1 stop18h 13mFinnair

Deal found 12/6£589

Mon 4/813:39GEG - LHR

1 stop12h 41mAmerican Airlines

Thu 14/812:00LHR - GEG

1 stop18h 36mAmerican Airlines

Deal found 11/6£603

Thu 17/714:00BOI - LHR

2 stops16h 30mVirgin Atlantic

Sat 26/711:45LHR - BOI

2 stops19h 14mVirgin Atlantic

Deal found 12/6£762

Last-minute flights from Idaho to Heathrow
Discover last-minute flight deals from Idaho to Heathrow. Data last updated 13 June 2025 and is based on user searches.

Tue 17/615:20GEG - LHR

2 stops36h 35mIcelandair

Mon 23/621:25LHR - GEG

2 stops34h 34mIcelandair

Deal found 12/6£932

Tue 17/613:37GEG - LHR

1 stop12h 03mLufthansa

Mon 23/620:25LHR - GEG

2 stops28h 39mLufthansa

Deal found 11/6£1,265

Wed 18/616:50BOI - LHR

2 stops20h 30mIcelandair

Wed 25/621:25LHR - BOI

2 stops32h 21mIcelandair

Deal found 11/6£942

Wed 18/605:10BOI - LHR

1 stop21h 30mUnited Airlines

Wed 25/614:05LHR - BOI

2 stops35h 02mUnited Airlines

Deal found 11/6£1,264

Wed 18/615:00BOI - LHR

1 stop15h 10mKLM

Wed 25/613:05LHR - BOI

1 stop16h 24mKLM

Deal found 11/6£1,281

Fri 20/605:30GEG - LHR

2 stops17h 00mMultiple Airlines

Sat 21/621:25LHR - GEG

2 stops34h 34mMultiple Airlines

Deal found 10/6£1,565

Sat 21/617:55IDA - LHR

2 stops31h 40mUnited Airlines

Wed 9/714:05LHR - IDA

2 stops32h 24mUnited Airlines

Deal found 11/6£1,275

Sun 22/607:00GEG - LHR

1 stop15h 20mUnited Airlines

Fri 4/714:05LHR - GEG

2 stops38h 58mUnited Airlines

Deal found 11/6£1,264

Sun 22/615:36GEG - LHR

1 stop14h 39mKLM

Fri 4/712:25LHR - GEG

1 stop15h 07mKLM

Deal found 10/6£1,281

Sun 22/611:12GEG - LHR

2 stops20h 48mScandinavian Airlines

Fri 4/721:05LHR - GEG

3 stops27h 35mScandinavian Airlines

Deal found 10/6£1,357

Mon 23/611:20IDA - LHR

1 stop15h 30mDelta

Wed 2/711:00LHR - IDA

1 stop14h 12mDelta

Deal found 13/6£1,281

Mon 23/615:04IDA - LHR

1 stop11h 46mKLM

Wed 2/711:00LHR - IDA

1 stop18h 55mKLM

Deal found 11/6£1,281

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 13 June 2025.

Fri 3/1006:35BOI - LHR

2 stops22h 20mMultiple Airlines

Deal found 10/6£246

Wed 23/707:16BOI - LHR

1 stop16h 09mAmerican Airlines

Deal found 11/6£344

Fri 3/1013:43BOI - LHR

1 stop14h 27mKLM

Deal found 10/6£378

Fri 12/910:20GEG - LHR

2 stops15h 55mDelta

Deal found 10/6£378

Fri 25/705:30GEG - LHR

2 stops17h 15mUnited Airlines

Deal found 10/6£381

Mon 14/717:52GEG - LHR

2 stops32h 08mMultiple Airlines

Deal found 11/6£397

Mon 30/613:00JAC - LHR

2 stops17h 10mVirgin Atlantic

Deal found 11/6£422

Mon 14/714:22GEG - LHR

1 stop14h 48mKLM

Deal found 11/6£428

Sun 13/718:53JAC - LHR

2 stops18h 07mDelta

Deal found 11/6£429

Mon 21/710:45BOI - LHR

3 stops18h 05mAir Canada

Deal found 11/6£478

Sat 21/611:46BOI - LHR

1 stop16h 04mFinnair

Deal found 12/6£540

Tue 24/607:00BOI - LHR

1 stop20h 50mIberia

Deal found 12/6£626

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

Wed 8/10

15:05-18:30

2 stops20h 25m

London Heathrow

Fri 17/10

10:20-23:04

2 stops19h 44m

£517

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Fri 12/9

13:00-09:20

2 stops36h 20m

London Heathrow

Fri 26/9

06:40-16:57

2 stops18h 17m

£529

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 9/11

06:20-11:50

2 stops22h 30m

London Heathrow

Fri 21/11

14:30-13:44

2 stops30h 14m

£536

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 19/8

05:15-12:20

1 stop23h 05m

London Heathrow

Fri 29/8

09:30-11:27

2 stops33h 57m

£536

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 9/11

07:21-11:40

1 stop21h 19m

London Heathrow

Fri 21/11

06:25-21:18

2 stops21h 53m

£539

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Fri 7/11

11:25-06:30

2 stops59h 05m

London Heathrow

Tue 18/11

07:40-20:45

2 stops21h 05m

£539

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Sun 26/10

10:45-09:40

1 stop16h 55m

London Heathrow

Thu 6/11

18:00-20:37

2 stops33h 37m

£541

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/9

10:40-09:40

1 stop16h 00m

London Heathrow

Tue 16/9

07:25-19:33

2 stops19h 08m

£541

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 1/9

05:15-10:00

2 stops44h 45m

London Heathrow

Tue 16/9

09:30-23:05

2 stops45h 35m

£545

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 12/11

11:30-10:00

1 stop15h 30m

London Heathrow

Thu 20/11

06:20-16:22

2 stops17h 02m

£546

Flights are sorted by cheapest return flights first.

Deals found on 10/6

Showing 1-10 of 45 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.

Rainfall in Heathrow by month

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.

Temperature in Heathrow by month

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).

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Delta, KLM and Finnair from Idaho to London by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,946 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

7,946 reviews

Delta

8.0

Very Good

7,946 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

1,358 reviews

Delta

8.0

Very Good

7,946 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

1,290 reviews

Delta

8.0

Very Good

7,946 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!

Air France

7.5

Good

1,463 reviews

Delta

8.0

Very Good

7,946 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

8,790 reviews

Delta

8.0

Very Good

7,946 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 £344 on American Airlines. Other airlines that offer cheap prices include KLM from £378 and Delta from £378 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 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, 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

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Top airline flying from Idaho to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£447	Average£883	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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Cheap flights from Idaho to London Heathrow Airport from £246

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 3/10. 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 13 June 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 13 June 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 13 June 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 13 June 2025.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Delta, KLM and Finnair from Idaho to London by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines 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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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 13 June 2025.