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$286+ Cheap flights from Idaho to London (LON)

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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LON
Jan 18 — Jan 251
Sun 1/18
Sun 1/25
1 adult, Economy
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Cheap 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 December 19, 2025.

This KLM deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:17 amBOI - LHR
1 stop16h 13mKLM
Sat 1/1011:05 amLHR - BOI
1 stop16h 50mKLM
Deal found 12/17$849
This Virgin Atlantic deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:30 amBOI - LHR
2 stops18h 20mVirgin Atlantic
Sat 1/109:40 amLHR - BOI
2 stops18h 15mVirgin Atlantic
Deal found 12/17$853
This Air Canada deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:15 amBOI - LHR
3 stops19h 15mMultiple Airlines
Sat 1/102:30 pmLHR - BOI
2 stops27h 55mMultiple Airlines
Deal found 12/17$1,289
This Cheapflightsfares deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:40 pmBOI - LHR
1 stop12h 00mLufthansa
Sat 1/1010:25 amLHR - BOI
1 stop15h 48mLufthansa
Deal found 12/19$1,438
This Booking.com deal was found by Cheapflights users on 12/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:00 amBOI - LHR
2 stops23h 20mAir Canada
Sat 1/102:30 pmLHR - BOI
2 stops27h 55mAir Canada
Deal found 12/19$1,545
This KLM deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:04 amGEG - LHR
1 stop15h 56mMultiple Airlines
Tue 1/66:20 amLHR - GEG
2 stops17h 55mMultiple Airlines
Deal found 12/18$1,612
This FlightHub deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:00 amGEG - LHR
2 stops23h 30mLufthansa
Tue 1/67:25 amLHR - GEG
2 stops21h 57mLufthansa
Deal found 12/17$1,632
This KLM deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/265:55 amGEG - LHR
1 stop20h 05mKLM
Tue 1/611:05 amLHR - GEG
1 stop16h 49mKLM
Deal found 12/18$1,634
This United Airlines deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2611:59 pmGEG - LHR
2 stops22h 41mUnited Airlines
Tue 1/67:25 amLHR - GEG
2 stops21h 57mUnited Airlines
Deal found 12/18$1,638
This Cheapflightsfares deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/222:40 pmBOI - LHR
1 stop12h 00mLufthansa
Mon 12/298:15 pmLHR - BOI
2 stops28h 48mLufthansa
Deal found 12/17$1,668
This Cheapflightsfares deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/182:30 pmJAC - LHR
1 stop12h 10mLufthansa
Mon 12/226:35 amLHR - JAC
2 stops21h 17mLufthansa
Deal found 12/17$1,690
This United Airlines deal was found by Cheapflights users on 12/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/265:00 amIDA - LHR
1 stop21h 40mUnited Airlines
Wed 12/317:30 amLHR - IDA
2 stops22h 29mUnited Airlines
Deal found 12/18$1,757

Find flight deals from Idaho to London

Keep the following information in mind while searching for Idaho to London flight deals. Data was last updated December 19, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$597
(Cheapflightsfares)

One-way from

$286
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$949
Provider with most accurate pricing for Boise Air Term. Gowen Fld-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-London (LON) flights.
Search Deals
From Idaho to London (LON)
Search Deals
One-way flight from Idaho to London (LON)
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($276 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated December 19, 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

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Thu 1/15

10:40 am-9:40 am

1 stop16h 00m

London Heathrow

Thu 1/22

6:35 am-8:42 pm

2 stops21h 07m

$597

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 3/4

12:38 pm-12:00 pm

1 stop15h 22m

London Heathrow

Wed 3/11

7:40 am-9:18 pm

2 stops20h 38m

$597

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 2/24

7:00 am-7:25 am

1 stop16h 25m

London Heathrow

Tue 3/10

7:40 am-9:03 pm

2 stops20h 23m

$597

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 2/25

1:44 pm-5:05 pm

2 stops19h 21m

London Heathrow

Wed 3/11

7:40 am-9:03 pm

2 stops20h 23m

$605

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

2:40 pm-9:40 am

1 stop12h 00m

London Heathrow

Tue 2/24

7:30 am-9:32 pm

2 stops21h 02m

$607

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 2/17

1:44 pm-10:20 pm

2 stops24h 36m

London Heathrow

Wed 3/4

6:35 am-9:07 pm

2 stops22h 32m

$615

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 1/15

6:30 am-6:40 am

2 stops17h 10m

London Heathrow

Wed 1/28

6:35 am-9:56 am

2 stops34h 21m

$619

SpokaneLondon

GEG - LGW

GEGLGW

Spokane

Wed 3/4

5:51 am-7:30 am

2 stops17h 39m

London Gatwick

Mon 3/9

12:30 pm-11:45 am

2 stops30h 15m

$620

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Fri 1/16

2:40 pm-7:50 am

1 stop34h 10m

London Heathrow

Fri 1/23

8:25 pm-7:06 pm

2 stops29h 41m

$622

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Fri 1/16

12:58 pm-8:10 pm

2 stops24h 12m

London Heathrow

Fri 1/23

8:25 pm-4:24 pm

2 stops26h 59m

$622

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/18

Showing 1-10 of 60 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 round-trip 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, July is the cheapest month in which you can book a flight from Idaho to London (average of $603). Flying from Idaho to London in June is currently the most expensive (average of $1,085). 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 December 19, 2025.

When flying from Idaho to London, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 22% versus a flight in the afternoon.

What is the cheapest day to fly from Idaho to London?

Use this chart to determine the cheapest time to fly round-trip from Idaho to London. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Idaho to London flight should consider departing on Sunday mornings when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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.

  • How long is the flight from Idaho to London?

    A quick flight from Idaho to London can take about 16h. Lufthansa provides one of the quickest options available for as low as $597. Idaho and London are separated by a distance of 4658 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The most popular flight routes from Idaho to London are Spokane - London Heathrow, Boise Air Term. Gowen Fld - London Heathrow and Spokane - London Gatwick.

  • 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 vacation 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, July is the cheapest month in which you can book a flight from Idaho to London (average of $603). Flying from Idaho to London in June is currently the most expensive (average of $1,085). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Ilford
Hounslow
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Croydon
Orpington
Watford
Hayes
Borehamwood
Aylesbury
Chipping Norton
Horley
Kingston upon Thames
Wembley
Folkestone
Eastbourne

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 5 airlines flying from Idaho to London

Discover the top 5 airlines 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 2,558,603 searches. Data last updated December 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$577Average$774FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$604Average$915FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$639Average$988FlexibilityNo cancel feeOn-time69%
DeltaCheapest$701Average$980FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$703Average$992FlexibilityNo cancel feeOn-time71%

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