How long is the flight from London to Idaho?

Airlines like Scandinavian Airlines, United Airlines, and Alaska Airlines fly from London to Idaho in about 19h 44m. The time it takes to get you to your destination can typically vary by up to 11h 19m. The distance from London to Idaho is about 4829 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 to Idaho?

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

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

Consider United Airlines, Virgin Atlantic or Lufthansa when booking your flight. These represent the most popular airlines when flying from London to Idaho.

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

When flying from London 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 London to Idaho that include hotel bookings?

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

How can I find direct flights from London to Idaho?

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

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

Yes. Cheapflights offers flight deals from London 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.

£417+ Cheap Flights from London to Idaho

Cheap flight deals from London to Idaho

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from London to Idaho
Explore the most affordable flight options available from London to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Mon 28/919:30 -

2 stops29h 39m

Sat 3/1013:00 -

2 stops24h 40m

Deal found 17/8£587

Sat 3/1006:40 -

2 stops20h 35m

Sat 10/1011:18 -

2 stops23h 12m

Deal found 19/8£594

Thu 24/919:30 -

2 stops30h 09m

Sun 27/912:17 -

2 stops26h 23m

Deal found 19/8£627

Sat 7/1110:20 -

2 stops19h 44m

Wed 11/1116:14 -

2 stops40h 46m

Deal found 19/8£629

Tue 17/1106:35 -

2 stops20h 06m

Tue 24/1107:00 -

2 stops22h 30m

Deal found 20/8£672

Tue 22/914:50 -

1 stop14h 24m

Tue 29/913:05 -

2 stops23h 35m

Deal found 19/8£681

Wed 4/1111:35 -

2 stops31h 03m

Sun 8/1111:22 -

2 stops25h 58m

Deal found 16/8£682

Tue 29/913:05 -

2 stops30h 58m

Sun 4/1018:50 -

1 stop29h 35m

Deal found 20/8£683

Thu 1/1015:40 -

2 stops16h 19m

Thu 8/1012:42 -

2 stops17h 58m

Deal found 17/8£684

Tue 17/1114:30 -

2 stops36h 11m

Tue 24/1113:10 -

1 stop14h 05m

Deal found 17/8£685

Tue 17/1111:35 -

2 stops31h 03m

Tue 24/1105:00 -

1 stop20h 40m

Deal found 20/8£691

Thu 24/916:15 -

1 stop34h 14m

Sun 27/912:26 -

1 stop35h 19m

Deal found 19/8£698

Best flights from London to Idaho
Discover carefully curated flight deals from London to Idaho that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Sat 7/1110:20 -

2 stops19h 44m

Wed 11/1116:14 -

2 stops40h 46m

Deal found 19/8£629

Wed 4/1111:35 -

2 stops31h 03m

Sun 8/1111:22 -

2 stops25h 58m

Deal found 17/8£682

Thu 1/1015:40 -

2 stops16h 19m

Thu 8/1012:42 -

2 stops17h 58m

Deal found 17/8£684

Wed 30/917:00 -

1 stop29h 20m

Wed 7/1013:58 -

1 stop18h 07m

Deal found 16/8£764

Sun 4/1011:45 -

2 stops17h 30m

Sun 11/1019:23 -

2 stops16h 47m

Deal found 20/8£786

Tue 8/906:45 -

2 stops37h 10m

Tue 6/1006:00 -

2 stops31h 35m

Deal found 16/8£795

Wed 30/910:55 -

1 stop18h 27m

Wed 7/1013:05 -

2 stops19h 30m

Deal found 16/8£799

Tue 8/918:00 -

1 stop34h 08m

Thu 17/916:25 -

1 stop13h 00m

Deal found 18/8£864

Tue 29/909:20 -

2 stops20h 39m

Sun 4/1018:44 -

2 stops14h 56m

Deal found 20/8£872

Sat 12/1210:25 -

2 stops38h 49m

Thu 31/1213:21 -

2 stops17h 39m

Deal found 20/8£937

Tue 15/1211:45 -

2 stops40h 55m

Tue 29/1205:25 -

2 stops29h 35m

Deal found 19/8£949

Sun 20/916:40 -

2 stops25h 50m

Sun 27/916:08 -

1 stop33h 32m

Deal found 21/8£716

Sat 7/1107:40 -

2 stops22h 53m

Wed 11/1114:51 -

1 stop11h 49m

Deal found 20/8£716

Fri 4/915:40 -

2 stops16h 19m

Fri 11/912:17 -

2 stops18h 23m

Deal found 17/8£795

Fri 4/1214:45 -

1 stop25h 53m

Tue 8/1210:20 -

1 stop19h 00m

Deal found 18/8£798

Thu 24/921:05 -

3 stops28h 34m

Sun 27/910:34 -

2 stops28h 06m

Deal found 19/8£818

Tue 15/910:55 -

1 stop18h 17m

Mon 21/915:19 -

1 stop11h 41m

Deal found 16/8£824

Tue 15/909:20 -

2 stops19h 52m

Mon 21/915:19 -

2 stops17h 16m

Deal found 16/8£824

Thu 14/107:40 -

2 stops23h 58m

Mon 18/105:00 -

2 stops18h 40m

Deal found 20/8£722

Mon 12/1009:15 -

2 stops19h 20m

Tue 27/1014:51 -

2 stops20h 49m

Deal found 18/8£874

Thu 28/114:45 -

1 stop31h 36m

Mon 1/213:56 -

1 stop15h 24m

Deal found 18/8£798

Tue 22/915:40 -

2 stops16h 19m

Tue 29/913:36 -

2 stops17h 04m

Deal found 19/8£801

Tue 15/910:55 -

1 stop18h 27m

Sat 19/913:05 -

2 stops34h 40m

Deal found 16/8£829

Sun 13/1219:40 -

2 stops33h 00m

Tue 29/1205:25 -

2 stops29h 35m

Deal found 19/8£949

Thu 1/1012:25 -

2 stops16h 47m

Thu 8/1013:00 -

2 stops17h 50m

Deal found 17/8£868

Wed 30/907:45 -

2 stops39h 54m

Wed 7/1012:20 -

1 stop13h 10m

Deal found 16/8£884

Tue 8/915:40 -

2 stops16h 19m

Tue 6/1016:41 -

2 stops13h 59m

Deal found 16/8£807

Wed 9/1207:40 -

2 stops23h 58m

Tue 29/1207:45 -

1 stop15h 40m

Deal found 17/8£741

Fri 2/1017:00 -

1 stop25h 06m

Fri 9/1011:48 -

1 stop20h 17m

Deal found 18/8£843

Tue 1/910:55 -

1 stop18h 37m

Fri 25/906:00 -

1 stop21h 00m

Deal found 16/8£868

Find flight deals from London to Idaho

Round-trip from	£587
One-way from	£417
Popular in	December
Cheapest in	January
Average price	£1,077

Scandinavian Airlines
28/9-3/10
4 total stops
54h 19m total
London to Idaho

Search Deals

10/12
2 total stops
33h 30m total
London to Idaho

Search Deals

Highest demand for flights based on searches. 0% potential increase in price (£6 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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

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

£629

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

LondonSpokane

LGW London Gatwick - GEG Spokane

LGWGEG

London Gatwick

Thu 1/10

15:40-23:59

2 stops16h 19m

Spokane

Thu 8/10

12:42-14:40

2 stops17h 58m

£684

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

£716

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

£716

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Thu 14/1

07:40-23:38

2 stops23h 58m

Spokane

Mon 18/1

05:00-07:40

2 stops18h 40m

£722

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Wed 9/12

07:40-23:38

2 stops23h 58m

Spokane

Tue 29/12

07:45-07:25

1 stop15h 40m

£741

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Wed 30/9

17:00-15:20

1 stop29h 20m

Idaho Falls Fanning Field

Wed 7/10

13:58-15:05

1 stop18h 07m

£764

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

£786

LondonSpokane

LCY London City - GEG Spokane

LCYGEG

London City

Tue 8/9

06:45-11:55

2 stops37h 10m

Spokane

Tue 6/10

06:00-21:35

2 stops31h 35m

£795

Flights are sorted by cheapest return flights first.

Deals found on 17/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from London to Idaho

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

LHR-BOI

LHR-GEG

LGW-GEG

LHR-IDA

LCY-GEG

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 to Idaho

LON-USID

LHR-BOI

LHR-GEG

LGW-GEG

LHR-IDA

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

Currently, January is the cheapest month in which you can book a flight from London to Idaho (average of £561). Flying from London to Idaho in August is currently the most expensive (average of £1,093). 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 to Idaho?

Airfare is below average for this route at the moment.

London to Idaho flights typically cost between £680 and £951 in September.
The cheapest return price found within the last 5 days was £627 on Scandinavian Airlines (24 Sept–27 Sept).

Reviews of airlines servicing Idaho

Get a feel of what it's like to fly with United Airlines,Virgin Atlantic, andLufthansa from London to Idaho 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.

United Airlines

7.4

Good

10,104 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

United Airlines

7.4

Good

10,104 reviews

United Airlines

7.4

Good

10,104 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Virgin Atlantic

7.4

Good

695 reviews

United Airlines

7.4

Good

10,104 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Lufthansa

6.8

Okay

8,202 reviews

United Airlines

7.4

Good

10,104 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Chris,Aug 2026

MIA - ORD

Related info for your journey

How long is the flight from London to Idaho?
Airlines like Scandinavian Airlines, United Airlines, and Alaska Airlines fly from London to Idaho in about 19h 44m. The time it takes to get you to your destination can typically vary by up to 11h 19m. The distance from London to Idaho is about 4829 mi. Both multi-stop and direct flights can be found to your destination and back.
What are the most popular routes from London to Idaho?
While some choose either London Heathrow - Spokane or London Gatwick - Boise Air Term. Gowen Fld, London Heathrow - Boise Air Term. Gowen Fld is the most popular route from London to Idaho.
Can I find deals for flights from London to Idaho that include hotel bookings?
Yes. In addition to deals on London to Idaho flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from London to Idaho?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Idaho.
Can I find deals for business class flights from London to Idaho?
Yes. Cheapflights offers flight deals from London 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 to Idaho?
Currently, January is the cheapest month in which you can book a flight from London to Idaho (average of £561). Flying from London to Idaho in August is currently the most expensive (average of £1,093). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to United States

Flights by cabin class

Other flight options

Popular flights

Top destinations

Alternative routes for London to Idaho

Heathrow to Newark flights

Heathrow to John F Kennedy Intl flights

Gatwick to John F Kennedy Intl flights

Heathrow to LaGuardia flights

Stansted to John F Kennedy Intl flights

London City to John F Kennedy Intl flights

Gatwick to Newark flights

Heathrow to Los Angeles flights

Heathrow to Orlando flights

Luton to John F Kennedy Intl flights

Heathrow to Miami flights

Gatwick to LaGuardia flights

London City to Newark flights

Stansted to Newark flights

Manchester to John F Kennedy Intl flights

Heathrow to Las Vegas flights

Luton to Newark flights

Manchester to Orlando flights

Heathrow to San Francisco flights

Heathrow to Boston flights

Heathrow to Dallas/Fort Worth flights

Heathrow to O'Hare Intl flights

Gatwick to Orlando flights

Gatwick to Los Angeles flights

Heathrow to Dulles Intl flights

Stansted to Orlando flights

Gatwick to Miami flights

Manchester to Newark flights

London City to Los Angeles flights

Stansted to Los Angeles flights

London City to Miami flights

Stansted to Miami flights

London City to Orlando flights

Heathrow to Tampa flights

Heathrow to Baltimore flights

Heathrow to Seattle flights

Heathrow to Hobby flights

Heathrow to Atlanta flights

Manchester to LaGuardia flights

Gatwick to Las Vegas flights

Edinburgh to Newark flights

Heathrow to Ontario flights

Gatwick to Boston flights

Heathrow to George Bush Intcntl flights

Luton to Miami flights

London City to Las Vegas flights

Edinburgh to John F Kennedy Intl flights

London City to Boston flights

Stansted to Las Vegas flights

Heathrow to Austin flights

Top 4 airlines flying from London to Idaho

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£500	Average£752	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£517	Average£910	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£707	Average£854	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Alaska Airlines	Cheapest£724	Average£935	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights

Fly with Cheapflights

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

Deals for London to Idaho flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from London to Idaho for you. Better yet — we are completely free to use.

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

Yes, we can. To see specific flights from London to Idaho with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can now track prices for flights from London to Idaho and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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 London to Idaho from £417

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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to Idaho

Cheapest flights from London to IdahoExplore the most affordable flight options available from London to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Explore the most affordable flight options available from London to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Best flights from London to IdahoDiscover carefully curated flight deals from London to Idaho that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Discover carefully curated flight deals from London to Idaho that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Last-minute flights from London to IdahoDiscover last-minute flight deals from London to Idaho. Data last updated 21 August 2026 and is based on user searches.

Discover last-minute flight deals from London to Idaho. Data last updated 21 August 2026 and is based on user searches.

One-way flights from London to IdahoSearch for one-way flight options from London to Idaho. Find affordable one-way fares based on user searches. Data last updated 21 August 2026.

Search for one-way flight options from London to Idaho. Find affordable one-way fares based on user searches. Data last updated 21 August 2026.

Find flight deals from London 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 to Idaho that are best for you.

Best time to book a flight from London to Idaho

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

Cheapflights Insights

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

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

Airfare is below average for this route at the moment.

London to Idaho flights typically cost between £680 and £951 in September.The cheapest return price found within the last 5 days was £627 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 21 August 2026.

Get a feel of what it's like to fly with United Airlines,Virgin Atlantic, andLufthansa from London to Idaho 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

How long is the flight from London to Idaho?

What are the most popular routes from London to Idaho?

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

How can I find direct flights from London to Idaho?

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

What is the cheapest month to book a flight from London 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 London 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 London to Idaho by cabin class

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

London and Idaho flights

Browse other London and Idaho flight options. Last updated on 21 August 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

London to Idaho flights

Consider these flights travelling from London to Idaho.

Top 4 airlines flying from London to Idaho

Fly with Cheapflights

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

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

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from London to Idaho
Explore the most affordable flight options available from London to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Best flights from London to Idaho
Discover carefully curated flight deals from London to Idaho that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Last-minute flights from London to Idaho
Discover last-minute flight deals from London to Idaho. Data last updated 21 August 2026 and is based on user searches.

One-way flights from London to Idaho
Search for one-way flight options from London to Idaho. Find affordable one-way fares based on user searches. Data last updated 21 August 2026.

London to Idaho flights typically cost between £680 and £951 in September.
The cheapest return price found within the last 5 days was £627 on Scandinavian Airlines (24 Sept–27 Sept).