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Cheap flights from London to Idaho from £353

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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BOI
30 Mar — 6 Apr1
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 25 March 2025.

Round-trip from

£537

One-way from

£353

Popular in

August

Cheapest in

November

Average price

£708
United Airlines
  • United Airlines
  • 3/6-24/6
  • 3 total stops
  • 46h 50m total
  • London to Idaho
22/4
  • 22/4
  • 2 total stops
  • 30h 47m total
  • London to Idaho
Highest demand for flights based on searches. 17% potential increase in price (£117 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£23 potential savings vs. average return price).
Average for round-trip flights in March 2025

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 25 March 2025.

Tue 3/616:15LHR - BOI
2 stops30h 44mUnited Airlines
Tue 24/612:39BOI - LHR
1 stop16h 06mUnited Airlines
Deal found 24/3£537
Wed 7/508:40LHR - GEG
2 stops22h 58mUnited Airlines
Wed 14/515:25GEG - LHR
1 stop14h 45mUnited Airlines
Deal found 24/3£551
Fri 2/510:55LGW - GEG
2 stops20h 09mMultiple Airlines
Sun 11/507:00GEG - LGW
1 stop19h 55mMultiple Airlines
Deal found 24/3£584
Fri 2/506:30LHR - GEG
2 stops25h 26mVirgin Atlantic
Sun 11/514:36GEG - LHR
1 stop35h 24mVirgin Atlantic
Deal found 24/3£585
Fri 2/516:15LHR - GEG
1 stop15h 23mMultiple Airlines
Sun 11/515:25GEG - LHR
1 stop32h 00mMultiple Airlines
Deal found 24/3£595
Thu 1/515:40LHR - GEG
1 stop15h 19mAmerican Airlines
Sat 10/515:18GEG - LHR
1 stop13h 32mAmerican Airlines
Deal found 24/3£602
Fri 19/916:40LHR - JAC
2 stops28h 03mUnited Airlines
Sat 27/913:28JAC - LHR
2 stops15h 17mUnited Airlines
Deal found 25/3£627
Tue 6/506:15LHR - IDA
2 stops23h 41mVirgin Atlantic
Tue 13/512:30IDA - LHR
2 stops15h 50mVirgin Atlantic
Deal found 24/3£627
Wed 11/609:55LHR - GEG
2 stops16h 51mDelta
Thu 24/713:00GEG - LHR
1 stop14h 20mDelta
Deal found 25/3£653
Tue 6/513:25LHR - IDA
1 stop16h 11mMultiple Airlines
Tue 13/516:35IDA - LHR
1 stop14h 40mMultiple Airlines
Deal found 24/3£664
Wed 18/610:35LHR - BOI
1 stop15h 30mLufthansa
Mon 23/610:45BOI - LHR
1 stop13h 40mLufthansa
Deal found 24/3£674
Tue 3/609:30LHR - BOI
2 stops31h 16mAir Canada
Tue 24/606:30BOI - LHR
2 stops20h 30mAir Canada
Deal found 24/3£689

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 25 March 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

Tue 3/6

16:15-15:59

2 stops30h 44m

Boise Air Term. Gowen Fld

Tue 24/6

12:39-11:45

1 stop16h 06m

£537

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 7/5

08:40-23:38

2 stops22h 58m

Spokane

Wed 14/5

05:29-07:40

2 stops18h 11m

£551

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Fri 2/5

10:55-23:04

2 stops20h 09m

Spokane

Sun 11/5

07:00-10:55

1 stop19h 55m

£584

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 2/5

06:30-23:56

2 stops25h 26m

Spokane

Sun 11/5

14:36-10:00

1 stop35h 24m

£585

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 2/5

16:15-23:38

1 stop15h 23m

Spokane

Sun 11/5

15:25-07:25

1 stop32h 00m

£595

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 1/5

15:40-22:59

1 stop15h 19m

Spokane

Sat 10/5

15:18-12:50

1 stop13h 32m

£602

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 6/5

06:15-22:56

2 stops23h 41m

Idaho Falls Fanning Field

Tue 13/5

12:30-11:20

2 stops15h 50m

£627

LondonJackson

LHR - JAC

LHRJAC

London Heathrow

Fri 19/9

16:40-13:43

2 stops28h 03m

Jackson Hole

Sat 27/9

13:28-11:45

2 stops15h 17m

£627

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 11/6

09:55-18:46

2 stops16h 51m

Spokane

Thu 24/7

13:00-11:20

1 stop14h 20m

£653

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 6/5

13:25-22:36

1 stop16h 11m

Idaho Falls Fanning Field

Tue 13/5

16:35-14:15

1 stop14h 40m

£664

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 60 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, 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 25 March 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.

Rainfall in Idaho by month

Plan your trip to Idaho by taking into account the average rainfall totals by month.

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.

Temperature in Idaho by month

Plan your trip to Idaho by taking into account the average temperature totals by month.

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).

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 25 March 2025.
See what other customers who have flown with Delta, Air New Zealand and KLM from London to Idaho have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
8.0
Very Good

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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?

    £603 is the cheapest one-way deal found within the past few days, from Air New Zealand. You may also be able to find cheap deals on Lufthansa and Iberia, with prices starting from £617 and £639, respectively.

  • What are the most popular routes 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

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.

Top 7 airlines flying from London to Idaho

Discover the top 7 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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£508Average£672FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£549Average£799FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
KLMCheapest£551Average£640FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£556Average£621FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£599Average£881FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£686Average£839FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£695Average£890FlexibilityNo 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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