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Cheap flights from London to Idaho from £410

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 22/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
10 Jul — 17 Jul1
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 June 2026.

Thu 9/713:05
LHR
-
GEG
2 stops18h 54m
Multiple Airlines
Wed 22/706:13
GEG
-
LHR
2 stops45h 42m
Multiple Airlines
Deal found 9/6£595
Tue 10/1107:40
LHR
-
GEG
2 stops23h 58m
United Airlines
Tue 17/1107:02
GEG
-
LHR
2 stops18h 08m
United Airlines
Deal found 8/6£623
Mon 22/613:00
LHR
-
BOI
1 stop17h 55m
United Airlines
Sun 28/617:46
BOI
-
LHR
1 stop11h 49m
United Airlines
Deal found 8/6£632
Thu 23/713:05
LHR
-
GEG
2 stops18h 54m
Multiple Airlines
Thu 30/706:13
GEG
-
LHR
2 stops21h 42m
Multiple Airlines
Deal found 8/6£647
Tue 10/1111:35
LHR
-
GEG
1 stop17h 34m
Lufthansa
Tue 17/1107:02
GEG
-
LHR
1 stop16h 23m
Lufthansa
Deal found 8/6£677
Wed 14/1013:05
LHR
-
GEG
2 stops29h 23m
United Airlines
Sun 18/1013:05
GEG
-
LHR
1 stop34h 20m
United Airlines
Deal found 7/6£682
Sat 5/906:55
LHR
-
BOI
2 stops19h 29m
United Airlines
Mon 7/912:24
BOI
-
LHR
1 stop35h 21m
United Airlines
Deal found 7/6£689
Fri 4/911:25
LHR
-
BOI
1 stop13h 33m
Lufthansa
Mon 7/912:24
BOI
-
LHR
1 stop35h 21m
Lufthansa
Deal found 8/6£729
Tue 10/1110:00
LGW
-
GEG
2 stops19h 37m
Virgin Atlantic
Tue 17/1110:50
GEG
-
LGW
2 stops20h 55m
Virgin Atlantic
Deal found 8/6£737
Fri 7/809:00
LHR
-
GEG
2 stops19h 56m
Multiple Airlines
Fri 14/806:13
GEG
-
LHR
2 stops19h 22m
Multiple Airlines
Deal found 7/6£739
Tue 10/1109:20
LCY
-
GEG
2 stops18h 07m
Virgin Atlantic
Tue 17/1110:05
GEG
-
LCY
2 stops22h 30m
Virgin Atlantic
Deal found 8/6£745
Sun 13/908:50
LHR
-
GEG
2 stops36h 33m
Multiple Airlines
Sun 20/917:21
GEG
-
LHR
1 stop13h 44m
Multiple Airlines
Deal found 8/6£752

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 June 2026.

Round-trip from

£595

One-way from

£410

Popular in

December

Cheapest in

January

Average price

£807
9/7-22/7
  • 9/7-22/7
  • 4 total stops
  • 64h 36m total
  • London to Idaho
Search Deals
22/6
  • 22/6
  • 3 total stops
  • 48h 17m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£41 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 June 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 10/11

07:40-23:38

2 stops23h 58m

Spokane

Tue 17/11

12:30-11:15

1 stop14h 45m

£623

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 14/10

13:05-10:28

2 stops29h 23m

Spokane

Sun 18/10

13:05-07:25

1 stop34h 20m

£682

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 5/9

06:55-19:24

2 stops19h 29m

Boise Air Term. Gowen Fld

Mon 7/9

12:24-06:45

1 stop35h 21m

£689

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 8/7

06:55-17:56

2 stops18h 01m

Boise Air Term. Gowen Fld

Wed 15/7

10:35-07:25

1 stop13h 50m

£779

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 9/7

06:55-21:05

2 stops22h 10m

Spokane

Wed 22/7

05:00-12:35

1 stop23h 35m

£795

LondonSpokane

LCY - GEG

LCYGEG

London City

Fri 9/10

10:00-19:27

2 stops17h 27m

Spokane

Tue 20/10

13:00-17:20

2 stops20h 20m

£807

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sat 4/7

06:55-20:30

2 stops21h 35m

Spokane

Sat 11/7

16:08-12:25

1 stop12h 17m

£813

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sat 4/7

09:50-19:00

1 stop17h 10m

Spokane

Sat 11/7

07:23-13:45

1 stop22h 22m

£814

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 13/9

08:40-19:20

2 stops18h 40m

Spokane

Sun 20/9

06:20-09:15

2 stops18h 55m

£821

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

08:55-21:20

1 stop19h 25m

Idaho Falls Fanning Field

Fri 25/9

12:15-10:55

1 stop15h 40m

£825

Flights are sorted by cheapest return flights first.

Deals found on 10/6

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
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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 £503). Flying from London to Idaho in July is currently the most expensive (average of £661). 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?

How far ahead should I book a flight from London to Idaho?

The best time to book flights from London to Idaho is 75 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 June 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
689 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Overall

7.5

Comfort

7.3

Boarding

7.7

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
689 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Overall

7.5

Comfort

7.3

Boarding

7.7

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
9,808 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Overall

7.5

Comfort

7.3

Boarding

7.7

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
672 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Overall

7.5

Comfort

7.3

Boarding

7.7

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
8,053 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Entertainment

7.5

Overall

7.5

Comfort

7.3

Boarding

7.7

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 United Airlines, Virgin Atlantic, and American Airlines fly from London to Idaho in about 17h 27m. The time it takes to get you to your destination can typically vary by up to 6h 31m. The distance from London to Idaho is about 4655 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 - Idaho Falls Fanning Field, London Heathrow - Spokane 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 £503). Flying from London to Idaho in July is currently the most expensive (average of £661). 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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Heathrow to Ontario flights
Heathrow to Reagan-National flights
Heathrow to Denver flights
Gatwick to San Francisco flights
Luton to Boston flights
Gatwick to Dulles Intl flights

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 June 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£510Average£643FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£549Average£700FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£597Average£837FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Alaska AirlinesCheapest£838Average£1,122FlexibilityNo 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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