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

For as low as £671, Scandinavian Airlines can have you in Idaho from London Heathrow Airport in 20h 06m. Airlines will cover a distance of 4643 mi. Both multi-stop and direct flights can be found to your destination and back.

In terms of precipitation, rainfall in Idaho ranges from 5.0 - 41.0 inches per month. December is typically the wettest month, when rainfall can reach 41.0 mm. August is typically the driest time to visit Idaho when rainfall is around 5.0 mm.

If weather is an important factor for your trip to Idaho, 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 24.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around -1.0 C).

What are the most popular routes from London Heathrow Airport to Idaho?

While some choose either London Heathrow - Spokane or London Heathrow - Jackson Hole, London Heathrow - Boise Air Term. Gowen Fld is the most popular route from London Heathrow Airport to Idaho.

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

When booking a flight from London Heathrow Airport to Idaho, you may want to consider flying on United Airlines, Virgin Atlantic or Lufthansa as they are the most popular for this route.

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

When flying from London Heathrow Airport to Idaho, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

How can I find direct flights from Heathrow to Idaho?

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

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

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

£327+ Cheap Flights from London Heathrow Airport to Idaho

Cheap flight deals from Heathrow to Idaho

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Heathrow to Idaho
Explore the most affordable flight options available from Heathrow to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 August 2026.

Thu 24/919:30 -

2 stops30h 09m

Sun 27/912:17 -

2 stops26h 23m

Deal found 19/8£626

Sat 7/1110:20 -

2 stops19h 44m

Wed 11/1116:14 -

2 stops40h 46m

Deal found 19/8£628

Fri 2/1021:05 -

3 stops28h 35m

Sun 11/1012:08 -

3 stops21h 17m

Deal found 22/8£629

Sat 19/906:40 -

2 stops20h 35m

Sat 26/913:00 -

3 stops21h 50m

Deal found 22/8£654

Mon 5/1006:50 -

2 stops36h 49m

Mon 12/1006:00 -

2 stops22h 25m

Deal found 23/8£662

Tue 17/1106:35 -

2 stops20h 06m

Tue 24/1107:00 -

2 stops22h 30m

Deal found 20/8£671

Tue 22/914:50 -

1 stop14h 24m

Tue 29/913:05 -

2 stops23h 35m

Deal found 19/8£680

Wed 4/1111:35 -

2 stops31h 03m

Sun 8/1111:22 -

2 stops25h 58m

Deal found 19/8£682

Tue 29/913:05 -

2 stops30h 58m

Sun 4/1018:50 -

1 stop29h 35m

Deal found 20/8£682

Tue 17/1111:35 -

2 stops31h 03m

Tue 24/1105:00 -

1 stop20h 40m

Deal found 20/8£690

Thu 24/916:15 -

1 stop34h 14m

Sun 27/912:26 -

1 stop35h 19m

Deal found 19/8£697

Tue 17/1115:00 -

3 stops29h 47m

Tue 24/1107:00 -

2 stops20h 20m

Deal found 20/8£702

Best flights from Heathrow to Idaho
Discover carefully curated flight deals from Heathrow to Idaho that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 August 2026.

Fri 2/1021:05 -

3 stops28h 35m

Sun 11/1012:08 -

2 stops22h 32m

Deal found 22/8£626

Wed 4/1111:35 -

2 stops31h 03m

Sun 8/1111:22 -

2 stops25h 58m

Deal found 19/8£682

Sun 4/1011:45 -

2 stops17h 30m

Sun 11/1019:23 -

2 stops16h 47m

Deal found 20/8£785

Fri 4/1214:45 -

1 stop25h 53m

Tue 8/1210:20 -

1 stop19h 00m

Deal found 19/8£799

Sat 7/1110:20 -

2 stops19h 44m

Wed 11/1116:14 -

2 stops40h 46m

Deal found 23/8£631

Tue 29/913:05 -

2 stops30h 58m

Sun 4/1018:50 -

1 stop29h 35m

Deal found 22/8£685

Sun 20/916:40 -

2 stops25h 50m

Sun 27/916:08 -

1 stop33h 32m

Deal found 21/8£714

Thu 28/114:45 -

1 stop31h 36m

Mon 1/213:56 -

1 stop15h 24m

Deal found 20/8£801

Sat 7/1107:40 -

2 stops22h 53m

Wed 11/1114:51 -

1 stop11h 49m

Deal found 23/8£715

Thu 14/114:45 -

1 stop26h 56m

Mon 18/119:37 -

1 stop33h 43m

Deal found 23/8£802

Thu 24/921:05 -

3 stops28h 34m

Sun 27/910:34 -

2 stops28h 06m

Deal found 19/8£816

Thu 14/107:40 -

2 stops23h 58m

Mon 18/105:00 -

1 stop20h 40m

Deal found 20/8£721

Thu 24/914:50 -

1 stop13h 45m

Wed 23/1217:25 -

1 stop33h 15m

Deal found 21/8£784

Mon 26/1014:45 -

1 stop30h 35m

Fri 30/1006:09 -

1 stop24h 11m

Deal found 20/8£953

Fri 11/1215:20 -

2 stops28h 04m

Sun 27/1223:42 -

2 stops22h 58m

Deal found 23/8£817

Thu 10/1207:40 -

2 stops18h 17m

Mon 28/1205:00 -

2 stops16h 55m

Deal found 23/8£846

Wed 2/1211:10 -

2 stops29h 38m

Sun 6/1215:30 -

2 stops31h 25m

Deal found 23/8£861

Tue 6/1014:50 -

2 stops33h 37m

Tue 13/1014:48 -

1 stop11h 52m

Deal found 23/8£885

Wed 7/1016:15 -

1 stop36h 37m

Wed 14/1015:19 -

2 stops35h 21m

Deal found 23/8£885

Fri 4/1210:25 -

2 stops35h 21m

Tue 8/1214:29 -

1 stop12h 11m

Deal found 19/8£911

Thu 1/1016:15 -

2 stops28h 30m

Tue 6/1012:20 -

1 stop13h 40m

Deal found 22/8£915

Tue 16/206:35 -

2 stops21h 27m

Tue 23/207:00 -

1 stop19h 40m

Deal found 20/8£934

Sun 4/1009:30 -

2 stops42h 24m

Sun 11/1016:05 -

1 stop34h 35m

Deal found 20/8£942

Fri 13/1106:35 -

2 stops21h 22m

Tue 17/1107:00 -

2 stops17h 40m

Deal found 19/8£956

Thu 8/1007:30 -

2 stops16h 46m

Thu 15/1007:00 -

2 stops16h 55m

Deal found 20/8£957

Wed 17/208:00 -

3 stops20h 02m

Tue 23/212:30 -

2 stops15h 20m

Deal found 20/8£958

Thu 28/106:35 -

2 stops17h 47m

Mon 1/207:00 -

1 stop19h 40m

Deal found 19/8£963

Thu 17/908:00 -

1 stop18h 27m

Thu 24/914:38 -

1 stop14h 47m

Deal found 20/8£980

Thu 14/110:00 -

2 stops18h 11m

Mon 18/107:00 -

2 stops20h 25m

Deal found 22/8£992

Find flight deals from Heathrow to Idaho

Round-trip from	£594
One-way from	£327
Popular in	December
Cheapest in	January
Average price	£1,089

Scandinavian Airlines
3/10-10/10
4 total stops
43h 47m total
London to Idaho

Search Deals

6/12
3 total stops
47h 45m total
London to Idaho

Search Deals

Highest demand for flights based on searches. 1% potential increase in price (£8 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 2/10

21:05-18:40

3 stops28h 35m

Boise Air Term. Gowen Fld

Sun 11/10

12:08-17:40

2 stops22h 32m

£626

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 7/11

10:20-23:04

2 stops19h 44m

Boise Air Term. Gowen Fld

Wed 11/11

16:14-16:00

2 stops40h 46m

£631

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Wed 4/11

11:35-10:38

2 stops31h 03m

Spokane

Sun 8/11

11:22-21:20

2 stops25h 58m

£682

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Tue 29/9

13:05-13:03

2 stops30h 58m

Boise Air Term. Gowen Fld

Sun 4/10

18:50-07:25

1 stop29h 35m

£685

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Sun 20/9

16:40-10:30

2 stops25h 50m

Spokane

Sun 27/9

16:08-09:40

1 stop33h 32m

£714

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 7/11

07:40-23:33

2 stops22h 53m

Boise Air Term. Gowen Fld

Wed 11/11

14:51-09:40

1 stop11h 49m

£715

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Thu 14/1

07:40-23:38

2 stops23h 58m

Spokane

Mon 18/1

05:00-09:40

1 stop20h 40m

£721

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Thu 24/9

14:50-21:35

1 stop13h 45m

Boise Air Term. Gowen Fld

Wed 23/12

17:25-09:40

1 stop33h 15m

£784

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Sun 4/10

11:45-21:15

2 stops17h 30m

Spokane

Sun 11/10

19:23-20:10

2 stops16h 47m

£785

LondonHailey

LHR London Heathrow - SUN Hailey Sun Valley-Friedman

LHRSUN

London Heathrow

Fri 4/12

14:45-09:38

1 stop25h 53m

Hailey Sun Valley-Friedman

Tue 8/12

10:20-12:20

1 stop19h 00m

£799

Flights are sorted by cheapest return flights first.

Deals found on 21/8

Showing 1-10 of 57 resultsSorted by cheapest first

...

Best time to book a flight from Heathrow to Idaho

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

LHR-BOI

LHR-GEG

LHR-SUN

LHR-IDA

LHR-JAC

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 London Heathrow Airport to Idaho

LHR-USID

LHR-BOI

LHR-GEG

LHR-SUN

LHR-IDA

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

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of £626). Flying from London Heathrow Airport to Idaho in August is currently the most expensive (average of £1,118). 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.

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

Airfare is below average for this route at the moment.

London Heathrow Airport to Idaho flights typically cost between £829 and £957 in September.
The cheapest return price found within the last 5 days was £626 on Scandinavian Airlines (24 Sept–27 Sept).

Reviews of airlines servicing Idaho

See what other customers who have flown with Alaska Airlines,United Airlines, andVirgin Atlantic from London Heathrow Airport to Idaho have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

7.9

Good

12,841 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jun 2026

LHR - SEA

It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.

Alaska Airlines

7.9

Good

12,841 reviews

Alaska Airlines

7.9

Good

12,841 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jun 2026

LHR - SEA

United Airlines

7.4

Good

10,116 reviews

Alaska Airlines

7.9

Good

12,841 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jun 2026

LHR - SEA

Virgin Atlantic

7.4

Good

695 reviews

Alaska Airlines

7.9

Good

12,841 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jun 2026

LHR - SEA

Lufthansa

6.8

Okay

8,215 reviews

Alaska Airlines

7.9

Good

12,841 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jun 2026

LHR - SEA

Related info for your journey

How long is the flight from London Heathrow Airport to Idaho?
For as low as £671, Scandinavian Airlines can have you in Idaho from London Heathrow Airport in 20h 06m. Airlines will cover a distance of 4643 mi. Both multi-stop and direct flights can be found to your destination and back.
What are the most popular routes from London Heathrow Airport to Idaho?
While some choose either London Heathrow - Spokane or London Heathrow - Jackson Hole, London Heathrow - Boise Air Term. Gowen Fld is the most popular route from London Heathrow Airport to Idaho.
Can I find deals for flights from Heathrow to Idaho that include hotel bookings?
Yes. In addition to deals on Heathrow to Idaho flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Idaho?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Idaho.
Can I find deals for business class flights from Heathrow to Idaho?
Yes. Cheapflights offers flight deals from Heathrow to Idaho 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 London Heathrow Airport to Idaho?
Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Idaho (average of £626). Flying from London Heathrow Airport to Idaho in August is currently the most expensive (average of £1,118). 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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Alternative routes for Heathrow to Idaho

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Top 4 airlines flying from Heathrow to Idaho

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£500	Average£754	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£516	Average£908	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£706	Average£834	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Alaska Airlines	Cheapest£723	Average£934	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Idaho from Heathrow today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Idaho?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Idaho.

Can Cheapflights find flights from Heathrow to Idaho with no change fees?

Certainly. Search results for flights to Idaho from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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Cheap flights from London Heathrow Airport to Idaho from £327

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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Idaho

Cheapest flights from Heathrow to IdahoExplore the most affordable flight options available from Heathrow to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 August 2026.

Explore the most affordable flight options available from Heathrow to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 August 2026.

Best flights from Heathrow to IdahoDiscover carefully curated flight deals from Heathrow to Idaho that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 August 2026.

Discover carefully curated flight deals from Heathrow to Idaho that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 August 2026.

Last-minute flights from Heathrow to IdahoDiscover last-minute flight deals from Heathrow to Idaho. Data last updated 24 August 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Idaho. Data last updated 24 August 2026 and is based on user searches.

One-way flights from Heathrow to IdahoSearch for one-way flight options from Heathrow to Idaho. Find affordable one-way fares based on user searches. Data last updated 24 August 2026.

Search for one-way flight options from Heathrow to Idaho. Find affordable one-way fares based on user searches. Data last updated 24 August 2026.

Find flight deals from Heathrow to Idaho

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 London Heathrow Airport to Idaho that are best for you.

Best time to book a flight from Heathrow to Idaho

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

Cheapflights Insights

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

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

Airfare is below average for this route at the moment.

London Heathrow Airport to Idaho flights typically cost between £829 and £957 in September.The cheapest return price found within the last 5 days was £626 on Scandinavian Airlines (24 Sept–27 Sept).

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated 24 August 2026.

Related info for your journey

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

What are the most popular routes from London Heathrow Airport to Idaho?

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

How can I find direct flights from Heathrow to Idaho?

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

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

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

Complete your trip

Complete your trip to Idaho by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Heathrow to Idaho by cabin class

Find flights from Heathrow to Idaho, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Heathrow and Idaho flights

Browse other Heathrow and Idaho flight options. Last updated on 24 August 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Heathrow to Idaho flights

Consider these flights travelling from Heathrow to Idaho.

Top 4 airlines flying from Heathrow to Idaho

Fly with Cheapflights

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

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Idaho?

Can Cheapflights find flights from Heathrow to Idaho with no change fees?

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

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Travel Smart

Cheapest flights from Heathrow to Idaho
Explore the most affordable flight options available from Heathrow to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 August 2026.

Best flights from Heathrow to Idaho
Discover carefully curated flight deals from Heathrow to Idaho that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 August 2026.

Last-minute flights from Heathrow to Idaho
Discover last-minute flight deals from Heathrow to Idaho. Data last updated 24 August 2026 and is based on user searches.

One-way flights from Heathrow to Idaho
Search for one-way flight options from Heathrow to Idaho. Find affordable one-way fares based on user searches. Data last updated 24 August 2026.

London Heathrow Airport to Idaho flights typically cost between £829 and £957 in September.
The cheapest return price found within the last 5 days was £626 on Scandinavian Airlines (24 Sept–27 Sept).