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Cheap flights from Idaho to London from £230

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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LON
23 apr — 30 apr1
1 adult

Cheap flight deals from Idaho to London

Keep the following information in mind while searching for Idaho to London flight deals. Data was last updated 18 aprile 2025.

Round-trip from

£473

One-way from

£230

Popular in

June

Cheapest in

November

Average price

£607
Scandinavian Airlines
  • Scandinavian Airlines
  • 14/10-21/10
  • 4 total stops
  • 49h 36m total
  • Idaho to London
Search Deals
24/9
  • 24/9
  • 1 total stop
  • 19h 45m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (£185 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 April 2025
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Find flight deals from Idaho to London

Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 aprile 2025.

mar 14/1015:05BOI - LHR
2 stops19h 35mScandinavian Airlines
mar 21/1019:30LHR - BOI
2 stops30h 01mScandinavian Airlines
Deal found 17/4£473
dom 4/507:00GEG - LGW
1 stop19h 55mMultiple Airlines
mer 14/510:55LGW - GEG
1 stop19h 34mMultiple Airlines
Deal found 17/4£518
dom 17/813:00GEG - LHR
2 stops19h 00mScandinavian Airlines
dom 24/818:40LHR - GEG
2 stops30h 19mScandinavian Airlines
Deal found 17/4£532
mar 14/1013:41BOI - LHR
1 stop14h 09mIberia
mar 21/1012:00LHR - BOI
1 stop16h 12mIberia
Deal found 17/4£563
ven 5/911:21GEG - LHR
2 stops16h 29mMultiple Airlines
dom 21/920:05LHR - GEG
2 stops32h 24mMultiple Airlines
Deal found 17/4£571
sab 10/506:30BOI - LGW
2 stops20h 30mMultiple Airlines
dom 25/510:55LGW - BOI
1 stop18h 57mMultiple Airlines
Deal found 17/4£574
sab 4/1010:56IDA - LHR
2 stops36h 34mUnited Airlines
mer 15/1009:30LHR - IDA
2 stops38h 45mUnited Airlines
Deal found 17/4£576
mar 4/1107:00GEG - LHR
1 stop16h 25mUnited Airlines
mar 18/1114:30LHR - GEG
2 stops28h 25mUnited Airlines
Deal found 17/4£576
ven 5/917:39BOI - LHR
2 stops53h 51mAir Canada
ven 19/914:05LHR - BOI
2 stops30h 25mAir Canada
Deal found 17/4£581
mer 3/907:00BOI - LHR
1 stop19h 40mUnited Airlines
mar 16/912:05LHR - BOI
2 stops30h 50mUnited Airlines
Deal found 18/4£581
mar 23/913:15BOI - LHR
1 stop13h 35mDelta
mer 1/1006:30LHR - BOI
2 stops19h 01mDelta
Deal found 17/4£584
mer 3/914:45BOI - LHR
1 stop15h 25mKLM
mar 16/912:25LHR - BOI
1 stop18h 13mKLM
Deal found 17/4£594

Cheapflights Fare Finder

Customise your flight search to find flights from Idaho to London 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 18 aprile 2025.
Use the filters below to find and compare flights from Idaho to London that are best for you.

Fly from

Idaho

Fly to

London

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

mar 14/10

15:05-17:40

2 stops19h 35m

London Heathrow

mar 21/10

19:30-18:31

2 stops30h 01m

£473

SpokaneLondon

GEG - LGW

GEGLGW

Spokane

dom 4/5

07:00-10:55

1 stop19h 55m

London Gatwick

mer 14/5

10:55-22:29

1 stop19h 34m

£518

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

dom 17/8

13:00-16:00

2 stops19h 00m

London Heathrow

dom 24/8

18:40-16:59

2 stops30h 19m

£532

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

mar 14/10

13:41-10:50

1 stop14h 09m

London Heathrow

mar 21/10

12:00-21:12

1 stop16h 12m

£563

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

ven 5/9

11:21-11:50

2 stops16h 29m

London Heathrow

dom 21/9

20:05-20:29

2 stops32h 24m

£571

BoiseLondon

BOI - LGW

BOILGW

Boise Air Term. Gowen Fld

sab 10/5

06:30-10:00

2 stops20h 30m

London Gatwick

dom 25/5

10:55-22:52

1 stop18h 57m

£574

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

sab 4/10

10:56-06:30

2 stops36h 34m

London Heathrow

mer 15/10

09:30-17:15

2 stops38h 45m

£576

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

ven 5/9

17:39-06:30

2 stops53h 51m

London Heathrow

ven 19/9

14:05-13:30

2 stops30h 25m

£581

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

mer 3/9

07:00-09:40

1 stop19h 40m

London Heathrow

mar 16/9

12:05-11:55

2 stops30h 50m

£581

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

mar 23/9

13:15-09:50

1 stop13h 35m

London Heathrow

mer 1/10

06:30-18:31

2 stops19h 01m

£584

Flights are sorted by cheapest return flights first.

Deals found on 17/4

Showing 1-10 of 55 results
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Best time to book a flight from Idaho to London

Have a flexible travel schedule? Discover the best time to fly to London from Idaho 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 Idaho to London

What is the cheapest month to book a flight from Idaho to London?

Currently, January is the cheapest month in which you can book a flight from Idaho to London (average of £112). Flying from Idaho to London in August is currently the most expensive (average of £164). 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 ID to LON?

Find hourly flight availability from Idaho to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 aprile 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to London as you normally would.

Rainfall in London by month

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

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London by month

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

If weather is an important factor for your trip to London, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 18 aprile 2025.
Read through reviews of airlines operating flights from Idaho to London, such as Delta, Alaska Airlines and KLM. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,917 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,917 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Alaska Airlines
8.0
Very Good
9,887 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,329 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,269 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Food

7.3

Overall

8.0

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Idaho to London. 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 Idaho to London one-way?

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as £361. However, be on the lookout for offers from KLM and United Airlines, as they are both options that can get you from Idaho to London for a low price.

  • What are the most popular routes from Idaho to London?

    While some choose either Spokane - London Heathrow or Boise Air Term. Gowen Fld - London Gatwick, Boise Air Term. Gowen Fld - London Heathrow is the most popular route from Idaho to London.

  • Can I find deals for flights from Idaho to London that include hotel bookings?

    Yes. In addition to deals on Idaho to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Idaho to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to London.

  • Can I find deals for business class flights from Idaho to London?

    Yes. Cheapflights offers flight deals from Idaho to London 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 Idaho to London?

    Currently, January is the cheapest month in which you can book a flight from Idaho to London (average of £112). Flying from Idaho to London in August is currently the most expensive (average of £164). 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

Travelling to a place near Idaho?

Book flights to Idaho if you plan to visit one of these locations
Hounslow
Deal
Milton Keynes
Gatwick
Luton
Slough
Croydon
Eastbourne
Wembley
Hayes
Crawley
Southend-on-Sea
Maidstone
Ipswich
Southall
Ilford
Winchester
Folkestone
Dartford
Watford

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Idaho to London

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

Discover the top airline that operate flights from Idaho to London. 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 18 aprile 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£459Average£929FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Idaho to London?

When you search for this flight from Idaho to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Idaho to London?

Millions of users choose and trust Cheapflights to book the best flight deals from Idaho to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Idaho to London flexibly with Cheapflights today.

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Of course! You can now track prices for flights from Idaho to London 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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