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Cheap flights from London to Idaho from £342

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
9 Aug — 16 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Idaho

Enter your travel dates to find the best prices.

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 10 July 2026.

Fri 18/917:00
LHR
-
BOI
2 stops36h 34m
Scandinavian Airlines
Fri 25/912:14
BOI
-
LHR
2 stops38h 06m
Scandinavian Airlines
Deal found 6/7£570
Tue 8/906:40
LHR
-
GEG
2 stops18h 29m
Scandinavian Airlines
Tue 6/1013:00
GEG
-
LHR
2 stops20h 40m
Scandinavian Airlines
Deal found 6/7£580
Thu 10/917:00
LHR
-
BOI
2 stops36h 34m
Scandinavian Airlines
Mon 14/916:00
BOI
-
LHR
2 stops41h 00m
Scandinavian Airlines
Deal found 5/7£590
Wed 16/914:10
LHR
-
BOI
2 stops27h 56m
United Airlines
Wed 23/917:40
BOI
-
LHR
1 stop11h 55m
United Airlines
Deal found 7/7£633
Tue 8/907:25
LHR
-
GEG
2 stops19h 51m
United Airlines
Tue 6/1013:38
GEG
-
LHR
1 stop14h 47m
United Airlines
Deal found 6/7£658
Tue 18/806:40
LHR
-
GEG
2 stops20h 34m
Scandinavian Airlines
Tue 25/813:00
GEG
-
LHR
2 stops20h 40m
Scandinavian Airlines
Deal found 8/7£673
Tue 29/911:25
LHR
-
GEG
1 stop17h 24m
Lufthansa
Tue 6/1013:05
GEG
-
LHR
1 stop14h 05m
Lufthansa
Deal found 9/7£676
Tue 15/911:25
LHR
-
GEG
1 stop17h 49m
Lufthansa
Sun 20/913:09
GEG
-
LHR
1 stop34h 16m
Lufthansa
Deal found 5/7£685
Thu 10/907:25
LHR
-
BOI
2 stops18h 54m
United Airlines
Mon 14/910:31
BOI
-
LHR
1 stop16h 09m
United Airlines
Deal found 5/7£688
Fri 18/914:10
LHR
-
BOI
2 stops32h 21m
United Airlines
Fri 25/917:30
BOI
-
LHR
1 stop11h 55m
United Airlines
Deal found 6/7£695
Tue 8/915:40
LGW
-
GEG
2 stops39h 31m
Icelandair
Tue 6/1016:38
GEG
-
LGW
2 stops38h 02m
Icelandair
Deal found 9/7£716
Tue 8/910:35
LGW
-
GEG
2 stops20h 19m
Virgin Atlantic
Tue 6/1015:30
GEG
-
LGW
2 stops16h 30m
Virgin Atlantic
Deal found 8/7£732

Find flight deals from London to Idaho

Keep the following information in mind while searching for London to Idaho flight deals. Data was last updated 10 July 2026.

Round-trip from

£570

One-way from

£342

Popular in

December

Cheapest in

January

Average price

£919
Scandinavian Airlines
  • Scandinavian Airlines
  • 18/9-25/9
  • 4 total stops
  • 74h 40m total
  • London to Idaho
Search Deals
4/9
  • 4/9
  • 2 total stops
  • 41h 11m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£32 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Idaho that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 July 2026.
Use the filters below to find and compare flights from London to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 8/9

06:40-17:09

2 stops18h 29m

Spokane

Tue 6/10

13:00-17:40

2 stops20h 40m

£580

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 15/9

07:05-18:50

3 stops19h 45m

Spokane

Sun 20/9

13:00-16:25

3 stops19h 25m

£586

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Thu 10/9

17:00-22:34

2 stops36h 34m

Boise Air Term. Gowen Fld

Mon 14/9

16:00-16:00

2 stops41h 00m

£590

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 18/9

07:05-22:34

3 stops22h 29m

Boise Air Term. Gowen Fld

Fri 25/9

12:14-18:30

3 stops23h 16m

£594

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 8/9

07:25-19:16

2 stops19h 51m

Spokane

Tue 6/10

13:38-12:25

1 stop14h 47m

£658

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 15/9

06:55-21:14

2 stops22h 19m

Spokane

Sun 20/9

15:54-09:40

1 stop33h 46m

£658

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 29/9

07:30-20:49

2 stops21h 19m

Spokane

Tue 6/10

05:00-12:25

1 stop23h 25m

£659

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 1/10

06:55-20:49

2 stops21h 54m

Spokane

Mon 5/10

05:00-10:40

2 stops21h 40m

£688

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Thu 10/9

07:25-19:19

2 stops18h 54m

Boise Air Term. Gowen Fld

Mon 14/9

10:31-09:40

1 stop16h 09m

£688

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 16/9

06:55-21:37

2 stops21h 42m

Boise Air Term. Gowen Fld

Wed 23/9

12:28-11:55

1 stop16h 27m

£698

Flights are sorted by cheapest return flights first.

Deals found on 8/7

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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.
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

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 £502). Flying from London to Idaho in July is currently the most expensive (average of £659). 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?

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 10 July 2026.
Get a feel of what it's like to fly with Virgin Atlantic,United Airlines, andIcelandair 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.
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.5

Food

6.9

Boarding

7.7

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
693 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.5

Food

6.9

Boarding

7.7

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
9,966 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.5

Food

6.9

Boarding

7.7

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Icelandair
7.0
Good
702 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.5

Food

6.9

Boarding

7.7

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Lufthansa
6.8
Okay
8,129 reviews
Virgin Atlantic
7.5
Good
693 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.5

Food

6.9

Boarding

7.7

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

Related info for your journey

Find useful and relevant information for your journey from London to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London to Idaho?

    Airlines like Scandinavian Airlines, United Airlines, and Icelandair fly from London to Idaho in about 18h 29m. The time it takes to get you to your destination can typically vary by up to 21h 02m. The distance from London to Idaho is about 4643 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 - Jackson Hole or London Heathrow - Spokane, London Heathrow - Idaho Falls Fanning Field 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 £502). Flying from London to Idaho in July is currently the most expensive (average of £659). 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

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Alternative routes for London to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from London to Idaho

Discover the top 4 airlines that operate flights from London to Idaho. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 July 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£509Average£666FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£553Average£699FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£600Average£836FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Alaska AirlinesCheapest£736Average£972FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights

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 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.

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