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Cheap flights from London to Idaho from £364

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
22 tammi — 29 tammi1
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 23 joulukuu 2025.

ke 24/1206:20LHR - SUN
2 stops23h 00mDelta
pe 9/107:25SUN - LHR
2 stops19h 50mDelta
Deal found 21/12£1,212

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 23 joulukuu 2025.

Round-trip from

£381

One-way from

£364

Popular in

December

Cheapest in

September

Average price

£1,109
3/2-10/2
  • 3/2-10/2
  • 4 total stops
  • 38h 15m total
  • London to Idaho
Search Deals
8/6
  • 8/6
  • 1 total stop
  • 36h 12m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£54 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 23 joulukuu 2025.
Use the filters below to find and compare flights from London to Idaho that are best for you.

Fly from

London

Fly to

Idaho

Route

Depart

Return

Price

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

ke 4/2

06:35-23:01

2 stops23h 26m

Boise Air Term. Gowen Fld

ke 11/2

06:23-11:50

2 stops22h 27m

£432

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ti 3/2

09:25-21:25

1 stop20h 00m

Spokane

ti 10/2

07:30-12:20

1 stop20h 50m

£507

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ke 11/2

08:20-10:26

2 stops34h 06m

Spokane

su 1/3

13:55-06:15

2 stops32h 20m

£535

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ma 9/2

10:35-18:49

1 stop16h 14m

Spokane

su 1/3

13:55-06:15

2 stops32h 20m

£535

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ti 10/3

06:35-21:18

2 stops21h 43m

Spokane

ti 17/3

12:42-13:30

2 stops17h 48m

£539

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ke 4/2

06:35-21:22

2 stops22h 47m

Spokane

ke 11/2

05:00-08:25

2 stops19h 25m

£540

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

to 12/2

07:40-21:07

2 stops21h 27m

Spokane

pe 27/2

12:38-13:30

2 stops16h 52m

£540

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ti 10/3

06:35-21:18

2 stops21h 43m

Spokane

ti 17/3

13:37-09:40

1 stop13h 03m

£540

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

ke 11/2

08:30-21:50

2 stops21h 20m

Spokane

la 28/2

07:00-05:55

1 stop14h 55m

£541

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

pe 27/2

11:10-23:48

2 stops19h 38m

Boise Air Term. Gowen Fld

ma 9/3

06:15-09:40

1 stop21h 25m

£585

Flights are sorted by cheapest return flights first.

Deals found on 21/12

Showing 1-10 of 46 results
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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, March is the cheapest month in which you can book a flight from London to Idaho (average of £510). Flying from London to Idaho in February is currently the most expensive (average of £711). 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 LON to ID?

Find hourly flight availability from London to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 joulukuu 2025.

A simple way to save on the total cost of your ticket is to fly from London to Idaho in the afternoon. If you’re flexible enough to do this you can expect to save up to 20% on your trip compared to booking a flight in the morning.

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 23 joulukuu 2025.
Get a feel of what it's like to fly with KLM, Virgin Atlantic, andUnited Airlines 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.
KLM
7.7
Good
1,434 reviews
Check prices

Overall

7.7

Crew

8.3

Food

7.2

Boarding

7.7

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,434 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Overall

7.7

Crew

8.3

Food

7.2

Boarding

7.7

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Virgin Atlantic
7.5
Good
677 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Overall

7.7

Crew

8.3

Food

7.2

Boarding

7.7

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
United Airlines
7.4
Good
9,105 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Overall

7.7

Crew

8.3

Food

7.2

Boarding

7.7

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Lufthansa
6.8
Okay
7,649 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Overall

7.7

Crew

8.3

Food

7.2

Boarding

7.7

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
British Airways
6.7
Okay
7,605 reviews
KLM
7.7
Good
1,434 reviews
Check prices

Overall

7.7

Crew

8.3

Food

7.2

Boarding

7.7

Entertainment

7.1

Comfort

7.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 American Airlines, Lufthansa, and United Airlines fly from London to Idaho in about 19h 38m. The time it takes to get you to your destination can typically vary by up to 14h 28m. 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 Gatwick - Boise Air Term. Gowen Fld or London Gatwick - Spokane, 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, March is the cheapest month in which you can book a flight from London to Idaho (average of £510). Flying from London to Idaho in February is currently the most expensive (average of £711). 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 3 airlines flying from London to Idaho

Discover the top 3 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 23 joulukuu 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest£535Average£654FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£538Average£845FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£599Average£834FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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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