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 £280 on Lufthansa. Other airlines that offer cheap prices include Iberia from £318 and Virgin Atlantic from £333 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 48% on the cost of this flight compared to booking a flight leaving this week. We have found prices from £546 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £952.

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 £677 per person but you can even find prices for as low as £454. The most expensive prices can be found in the month of June. Opting for a October flight can save you 50% 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.

£266+ Flights from Idaho to London Heathrow Airport

Cheap flight deals from Idaho to Heathrow

Round-trip from	£479
One-way from	£266
Popular in	June
Cheapest in	October
Average price	£728

United Airlines
14/9-8/10
2 total stops
30h 54m total
Idaho to London

Search Deals

23/7
2 total stops
17h 30m total
Idaho to London

Search Deals

Highest demand for flights based on searches. 23% potential increase in price (£154 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£25 potential savings vs. average return price).

Search Deals

Average for round-trip flights in May 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 16 May 2025.

Sun 14/914:45BOI - LHR

1 stop16h 25mUnited Airlines

Wed 8/1016:15LHR - BOI

1 stop14h 29mUnited Airlines

Deal found 15/5£479

Sat 23/814:42BOI - LHR

2 stops36h 18mMultiple Airlines

Fri 5/908:40LHR - BOI

2 stops19h 35mMultiple Airlines

Deal found 15/5£503

Wed 8/1008:20BOI - LHR

2 stops18h 15mAir Canada

Wed 15/1014:05LHR - BOI

2 stops35h 29mAir Canada

Deal found 15/5£507

Wed 8/1005:00IDA - LHR

2 stops19h 40mUnited Airlines

Wed 15/1014:05LHR - IDA

2 stops37h 59mUnited Airlines

Deal found 15/5£510

Wed 31/1207:30GEG - LHR

1 stop14h 25mUnited Airlines

Wed 14/108:55LHR - GEG

2 stops20h 29mUnited Airlines

Deal found 15/5£510

Tue 23/907:15BOI - LHR

1 stop20h 00mDelta

Wed 1/1006:15LHR - BOI

2 stops19h 16mDelta

Deal found 15/5£518

Tue 23/907:30BOI - LHR

1 stop18h 30mFinnair

Wed 1/1008:20LHR - BOI

1 stop19h 54mFinnair

Deal found 15/5£521

Wed 8/1012:46IDA - LHR

1 stop14h 44mMultiple Airlines

Wed 15/1016:30LHR - IDA

1 stop13h 08mMultiple Airlines

Deal found 16/5£524

Tue 23/915:00BOI - LHR

1 stop15h 10mKLM

Wed 1/1012:45LHR - BOI

1 stop17h 53mKLM

Deal found 15/5£524

Wed 31/1210:10GEG - LHR

1 stop15h 50mKLM

Wed 14/112:20LHR - GEG

1 stop14h 26mKLM

Deal found 15/5£524

Tue 19/811:20IDA - LHR

1 stop15h 30mKLM

Fri 12/911:45LHR - IDA

2 stops17h 35mKLM

Deal found 15/5£527

Wed 3/911:45BOI - LHR

2 stops15h 30mVirgin Atlantic

Tue 16/917:25LHR - BOI

1 stop13h 34mVirgin Atlantic

Deal found 16/5£527

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 16 May 2025.

Sun 14/914:45BOI - LHR

1 stop16h 25mUnited Airlines

Wed 8/1016:15LHR - BOI

1 stop14h 29mUnited Airlines

Deal found 15/5£479

Sat 23/814:42BOI - LHR

2 stops36h 18mMultiple Airlines

Fri 5/908:40LHR - BOI

2 stops19h 35mMultiple Airlines

Deal found 15/5£503

Wed 8/1008:20BOI - LHR

2 stops18h 15mAir Canada

Wed 15/1014:05LHR - BOI

2 stops35h 29mAir Canada

Deal found 15/5£507

Tue 23/907:15BOI - LHR

1 stop20h 00mDelta

Wed 1/1006:15LHR - BOI

2 stops19h 16mDelta

Deal found 15/5£518

Tue 23/907:30BOI - LHR

1 stop18h 30mFinnair

Wed 1/1008:20LHR - BOI

1 stop19h 54mFinnair

Deal found 15/5£521

Wed 3/914:45BOI - LHR

1 stop15h 25mKLM

Tue 16/910:55LHR - BOI

1 stop12h 53mKLM

Deal found 16/5£524

Wed 3/911:45BOI - LHR

2 stops15h 30mVirgin Atlantic

Tue 16/917:25LHR - BOI

1 stop13h 34mVirgin Atlantic

Deal found 16/5£527

Wed 8/1012:46IDA - LHR

1 stop16h 29mAmerican Airlines

Wed 15/1008:55LHR - IDA

2 stops19h 16mAmerican Airlines

Deal found 16/5£528

Sat 23/813:36BOI - LHR

1 stop33h 49mIberia

Fri 5/912:00LHR - BOI

1 stop16h 14mIberia

Deal found 15/5£528

Fri 15/814:00BOI - LHR

2 stops16h 35mScandinavian Airlines

Mon 25/806:40LHR - BOI

2 stops18h 30mScandinavian Airlines

Deal found 16/5£567

Wed 30/715:28GEG - LHR

1 stop14h 42mLufthansa

Wed 13/807:25LHR - GEG

2 stops18h 02mLufthansa

Deal found 15/5£578

Thu 7/820:46BOI - LHR

2 stops32h 09mIcelandair

Mon 11/821:25LHR - BOI

2 stops25h 45mIcelandair

Deal found 15/5£784

Last-minute flights from Idaho to Heathrow
Discover last-minute flight deals from Idaho to Heathrow. Data last updated 16 May 2025 and is based on user searches.

Thu 22/516:16GEG - LHR

2 stops20h 04mIcelandair

Mon 9/621:25LHR - GEG

2 stops24h 57mIcelandair

Deal found 15/5£832

Thu 22/513:37GEG - LHR

1 stop12h 03mLufthansa

Mon 9/620:25LHR - GEG

2 stops28h 39mLufthansa

Deal found 15/5£1,014

Thu 22/514:15GEG - LHR

1 stop16h 00mKLM

Mon 9/613:05LHR - GEG

1 stop16h 54mKLM

Deal found 15/5£1,065

Sat 24/516:35BOI - LHR

2 stops20h 45mIcelandair

Tue 10/613:05LHR - BOI

2 stops16h 37mIcelandair

Deal found 15/5£904

Sat 24/514:31BOI - LHR

1 stop33h 54mUnited Airlines

Tue 10/607:25LHR - BOI

2 stops21h 01mUnited Airlines

Deal found 15/5£962

Sat 24/512:39BOI - LHR

2 stops14h 21mAir Canada

Sat 14/609:30LHR - BOI

2 stops20h 22mAir Canada

Deal found 15/5£1,058

Sat 24/512:50BOI - LHR

2 stops15h 30mVirgin Atlantic

Sat 14/610:55LHR - BOI

1 stop18h 49mVirgin Atlantic

Deal found 15/5£1,068

Sun 25/507:14BOI - LHR

1 stop24h 11mFinnair

Sat 14/612:00LHR - BOI

1 stop17h 29mFinnair

Deal found 15/5£1,005

Mon 26/514:35BOI - LHR

1 stop12h 05mSWISS

Fri 6/608:40LHR - BOI

2 stops19h 46mSWISS

Deal found 15/5£950

Mon 26/508:10BOI - LHR

2 stops18h 50mMultiple Airlines

Fri 6/608:40LHR - BOI

2 stops19h 46mMultiple Airlines

Deal found 16/5£953

Mon 26/511:30BOI - LHR

1 stop15h 20mDelta

Fri 6/611:30LHR - BOI

2 stops17h 59mDelta

Deal found 16/5£961

Mon 26/514:47BOI - LHR

1 stop15h 23mKLM

Fri 6/612:25LHR - BOI

1 stop18h 57mKLM

Deal found 15/5£967

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 16 May 2025.

Wed 23/711:25BOI - LHR

2 stops17h 30mMultiple Airlines

Deal found 15/5£266

Wed 3/910:40BOI - LHR

2 stops22h 00mLufthansa

Deal found 15/5£280

Fri 12/913:38GEG - LHR

2 stops18h 02mLufthansa

Deal found 15/5£311

Wed 3/907:30BOI - LHR

1 stop23h 55mIberia

Deal found 15/5£318

Wed 23/714:00BOI - LHR

1 stop17h 15mVirgin Atlantic

Deal found 15/5£333

Mon 21/719:15BOI - LHR

3 stops28h 20mUnited Airlines

Deal found 15/5£338

Fri 12/912:35GEG - LHR

2 stops57h 55mAir Canada

Deal found 15/5£347

Thu 5/609:35GEG - LHR

3 stops49h 50mMultiple Airlines

Deal found 15/5£366

Fri 12/915:05GEG - LHR

1 stop15h 10mKLM

Deal found 15/5£371

Tue 17/605:05GEG - LHR

2 stops23h 00mWestJet

Deal found 15/5£612

Fri 30/507:00JAC - LHR

1 stop17h 15mUnited Airlines

Deal found 16/5£685

Fri 30/511:40JAC - LHR

1 stop15h 10mKLM

Deal found 15/5£834

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

Sun 14/9

14:45-14:10

1 stop16h 25m

London Heathrow

Wed 8/10

16:15-23:44

1 stop14h 29m

£479

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sat 23/8

14:42-10:00

2 stops36h 18m

London Heathrow

Fri 5/9

08:40-21:15

2 stops19h 35m

£503

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 8/10

08:20-09:35

2 stops18h 15m

London Heathrow

Wed 15/10

14:05-18:34

2 stops35h 29m

£507

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 8/10

05:00-07:40

2 stops19h 40m

London Heathrow

Wed 15/10

14:05-21:04

2 stops37h 59m

£510

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 23/9

07:15-10:15

1 stop20h 00m

London Heathrow

Wed 1/10

06:15-18:31

2 stops19h 16m

£518

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 23/9

07:30-09:00

1 stop18h 30m

London Heathrow

Wed 1/10

08:20-21:14

1 stop19h 54m

£521

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/9

14:45-13:10

1 stop15h 25m

London Heathrow

Tue 16/9

10:55-16:48

1 stop12h 53m

£524

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 8/10

12:46-10:30

1 stop14h 44m

London Heathrow

Wed 15/10

16:30-22:38

1 stop13h 08m

£524

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/9

11:45-10:15

2 stops15h 30m

London Heathrow

Tue 16/9

17:25-23:59

1 stop13h 34m

£527

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 19/8

11:20-13:10

2 stops18h 50m

London Heathrow

Fri 12/9

11:45-22:20

2 stops17h 35m

£527

Flights are sorted by cheapest return flights first.

Deals found on 15/5

Showing 1-10 of 50 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, Alaska Airlines and KLM 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!

Alaska Airlines

8.0

Very Good

10,000 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

1,344 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

1,280 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!

SWISS

7.5

Good

1,595 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 £280 on Lufthansa. Other airlines that offer cheap prices include Iberia from £318 and Virgin Atlantic from £333 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

Deal

Hounslow

Milton Keynes

Luton

Gatwick

Slough

Croydon

Wembley

Eastbourne

Crawley

Ilford

Southend-on-Sea

Northampton

Hayes

Ipswich

Watford

Swindon

Folkestone

Maidstone

Winchester

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£457	Average£925	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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

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 £266

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 23/7. 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 16 May 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 16 May 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 16 May 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 16 May 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, Alaska Airlines and KLM 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?

100% Free

Book with Flexibility

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 16 May 2025.