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Cheap flights from London to Idaho from £217

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 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
16 Jul — 23 Jul1
1 adult

Cheap flight deals from London to Idaho

Keep the following information in mind while searching for London to Idaho flight deals. Data was last updated 11 July 2025.

Round-trip from

£477

One-way from

£217

Popular in

August

Cheapest in

November

Average price

£865
25/8-1/9
  • 25/8-1/9
  • 2 total stops
  • 54h 25m total
  • London to Idaho
Search Deals
14/9
  • 14/9
  • 3 total stops
  • 49h 09m total
  • London to Idaho
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£90 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from London to Idaho

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 11 July 2025.

Mon 25/810:45LGW - GEG
1 stop34h 00mMultiple Airlines
Mon 1/906:25GEG - LGW
1 stop20h 25mMultiple Airlines
Deal found 11/7£477
Wed 24/908:40LHR - GEG
2 stops22h 25mUnited Airlines
Sun 28/905:15GEG - LHR
2 stops20h 20mUnited Airlines
Deal found 9/7£514
Wed 24/909:50LHR - GEG
2 stops17h 27mAmerican Airlines
Sun 28/912:36GEG - LHR
2 stops34h 19mAmerican Airlines
Deal found 10/7£519
Wed 24/914:50LHR - GEG
1 stop14h 13mLufthansa
Sun 28/912:35GEG - LHR
1 stop13h 50mLufthansa
Deal found 9/7£542
Mon 25/811:45LHR - GEG
2 stops20h 03mDelta
Tue 9/906:50GEG - LHR
2 stops15h 55mDelta
Deal found 10/7£545
Wed 24/909:20LCY - GEG
2 stops17h 25mVirgin Atlantic
Sun 28/914:23GEG - LCY
2 stops35h 07mVirgin Atlantic
Deal found 9/7£578
Wed 24/909:20LCY - GEG
2 stops17h 25mDelta
Sun 28/914:23GEG - LCY
2 stops33h 47mDelta
Deal found 8/7£579
Sun 24/813:35LHR - GEG
1 stop16h 50mMultiple Airlines
Sun 31/806:25GEG - LHR
1 stop26h 50mMultiple Airlines
Deal found 9/7£591
Mon 4/812:25LHR - GEG
1 stop18h 47mKLM
Thu 14/812:45GEG - LHR
1 stop16h 45mKLM
Deal found 10/7£610
Fri 26/912:05LHR - BOI
2 stops30h 34mAir Canada
Mon 6/1014:39BOI - LHR
2 stops34h 56mAir Canada
Deal found 11/7£614
Fri 29/814:10LHR - BOI
1 stop15h 31mLufthansa
Sun 21/914:42BOI - LHR
1 stop11h 58mLufthansa
Deal found 10/7£617
Wed 6/818:50LHR - GEG
2 stops29h 28mVirgin Atlantic
Thu 14/817:30GEG - LHR
1 stop12h 45mVirgin Atlantic
Deal found 10/7£618

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 11 July 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

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Mon 25/8

10:45-12:45

1 stop34h 00m

Spokane

Mon 1/9

06:25-10:50

1 stop20h 25m

£477

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 24/9

08:40-23:05

2 stops22h 25m

Spokane

Sun 28/9

11:20-11:45

1 stop16h 25m

£514

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 24/9

09:50-19:17

2 stops17h 27m

Spokane

Sun 28/9

12:36-06:55

2 stops34h 19m

£519

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 24/9

14:50-21:03

1 stop14h 13m

Spokane

Sun 28/9

12:35-10:25

1 stop13h 50m

£542

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 25/8

11:45-23:48

2 stops20h 03m

Spokane

Tue 9/9

06:50-06:45

2 stops15h 55m

£545

LondonSpokane

LCY - GEG

LCYGEG

London City

Wed 24/9

09:20-18:45

2 stops17h 25m

Spokane

Sun 28/9

14:23-09:30

2 stops35h 07m

£578

LondonSpokane

LCY - GEG

LCYGEG

London City

Wed 24/9

09:20-18:45

2 stops17h 25m

Spokane

Sun 28/9

14:23-08:10

2 stops33h 47m

£579

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 24/8

13:35-22:25

1 stop16h 50m

Spokane

Sun 31/8

06:25-17:15

1 stop26h 50m

£591

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/8

12:25-23:12

1 stop18h 47m

Spokane

Thu 14/8

12:45-13:30

1 stop16h 45m

£610

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 26/9

12:05-11:39

2 stops30h 34m

Boise Air Term. Gowen Fld

Mon 6/10

14:39-08:35

2 stops34h 56m

£614

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 60 results
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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, October is the cheapest month in which you can book a flight from London to Idaho (average of £754). Flying from London to Idaho in August is currently the most expensive (average of £1,152). 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 11 July 2025.

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.

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 11 July 2025.
Get a feel of what it's like to fly with Delta, KLM, andFinnair 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.
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very Good
7,951 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,372 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Finnair
7.6
Good
1,312 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air France
7.5
Good
1,467 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,655 reviews
Delta
8.0
Very Good
7,951 reviews
Check prices

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

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.

  • What are the cheapest airlines to fly from London to Idaho one-way?

    £548 is the cheapest one-way deal found within the past few days, from Lufthansa. You may also be able to find cheap deals on Icelandair and Iberia, with prices starting from £752 and £789, respectively.

  • 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, October is the cheapest month in which you can book a flight from London to Idaho (average of £754). Flying from London to Idaho in August is currently the most expensive (average of £1,152). 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 6 airlines flying from London to Idaho

Discover the top 6 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 11 July 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£524Average£638FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£529Average£571FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£531Average£640FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£531Average£803FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£595Average£847FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£661Average£847FlexibilityNo cancel feeOn-time70%
Search British Airways 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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