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$312+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LON
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$687
(FlightHub)

One-way from

$312
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$850
Provider with most accurate pricing for Boise Air Term. Gowen Fld-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-London (LON) flights.
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From Idaho to London (LON)
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One-way flight from Idaho to London (LON)
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Highest demand for flights based on searches. 28% potential increase in price ($368 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($49 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 28, 2025.

This FlightHub deal was found by Cheapflights users on 3/28. 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.
Wed 9/33:43 pmBOI - LHR
2 stops18h 57mScandinavian Airlines
Tue 9/1610:20 amLHR - BOI
2 stops19h 56mScandinavian Airlines
Deal found 3/28$687
This Scandinavian Airlines deal was found by Cheapflights users on 3/27. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/91:23 pmGEG - LHR
2 stops20h 17mMultiple Airlines
Tue 9/2310:20 amLHR - GEG
2 stops20h 05mMultiple Airlines
Deal found 3/27$699
This United deal was found by Cheapflights users on 3/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:00 amGEG - LHR
1 stop21h 00mUnited Airlines
Wed 1/142:30 pmLHR - GEG
2 stops28h 25mUnited Airlines
Deal found 3/27$759
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/235:00 pmBOI - LHR
1 stop14h 15mDelta
Wed 10/16:30 amLHR - BOI
2 stops17h 00mDelta
Deal found 3/27$768
This United deal was found by Cheapflights users on 3/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/45:57 pmIDA - LHR
1 stop32h 43mUnited Airlines
Wed 10/159:00 amLHR - IDA
2 stops31h 28mUnited Airlines
Deal found 3/27$778
This KLM deal was found by Cheapflights users on 3/27. 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.
Tue 9/232:35 pmBOI - LHR
1 stop16h 40mKLM
Wed 10/112:45 pmLHR - BOI
1 stop17h 44mKLM
Deal found 3/27$782
This Justfly.com deal was found by Cheapflights users on 3/27. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/25:25 pmBOI - LHR
2 stops33h 35mAir Canada
Thu 5/159:30 amLHR - BOI
2 stops43h 12mAir Canada
Deal found 3/27$815
This United deal was found by Cheapflights users on 3/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/212:05 pmBOI - LHR
1 stop13h 15mUnited Airlines
Thu 5/159:00 amLHR - BOI
2 stops20h 52mUnited Airlines
Deal found 3/27$817
This Kiwi.com deal was found by Cheapflights users on 3/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/15:49 pmGEG - LGW
2 stops33h 06mMultiple Airlines
Wed 5/710:55 amLGW - GEG
1 stop19h 34mMultiple Airlines
Deal found 3/26$821
This Finnair deal was found by Cheapflights users on 3/27. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/247:05 amBOI - LHR
1 stop16h 20mFinnair
Thu 5/112:00 pmLHR - BOI
1 stop17h 11mFinnair
Deal found 3/27$822
This oojo deal was found by Cheapflights users on 3/25. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/234:29 pmBOI - LGW
2 stops39h 11mIcelandair
Tue 9/303:40 pmLGW - BOI
2 stops38h 05mIcelandair
Deal found 3/25$833
This oojo deal was found by Cheapflights users on 3/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2711:35 amGEG - LHR
2 stops23h 55mIcelandair
Thu 12/48:40 pmLHR - GEG
2 stops34h 13mIcelandair
Deal found 3/27$848

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 March 28, 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

Wed 9/3

3:43 pm-5:40 pm

2 stops18h 57m

London Heathrow

Tue 9/16

10:20 am-11:16 pm

2 stops19h 56m

$687

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 9/9

1:23 pm-5:40 pm

2 stops20h 17m

London Heathrow

Tue 9/23

10:20 am-10:25 pm

2 stops20h 05m

$699

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 9/23

5:00 pm-2:15 pm

1 stop14h 15m

London Heathrow

Wed 10/1

6:30 am-4:30 pm

2 stops17h 00m

$768

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 9/23

2:35 pm-2:15 pm

1 stop16h 40m

London Heathrow

Wed 10/1

12:45 pm-11:29 pm

1 stop17h 44m

$782

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 4/23

4:08 pm-12:20 pm

1 stop12h 12m

London Heathrow

Fri 5/2

11:25 am-8:55 pm

1 stop17h 30m

$782

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Fri 5/2

5:25 pm-10:00 am

2 stops33h 35m

London Heathrow

Thu 5/15

9:30 am-9:42 pm

2 stops43h 12m

$815

SpokaneLondon

GEG - LGW

GEGLGW

Spokane

Mon 5/5

7:00 am-7:10 pm

2 stops28h 10m

London Gatwick

Sun 5/11

10:55 am-10:29 pm

1 stop19h 34m

$816

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Fri 5/2

12:05 pm-8:20 am

1 stop13h 15m

London Heathrow

Thu 5/15

9:00 am-10:52 pm

2 stops20h 52m

$817

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Thu 4/24

7:05 am-6:25 am

1 stop16h 20m

London Heathrow

Thu 5/1

12:00 pm-10:11 pm

1 stop17h 11m

$822

BoiseLondon

BOI - LGW

BOILGW

Boise Air Term. Gowen Fld

Tue 9/23

4:29 pm-2:40 pm

2 stops39h 11m

London Gatwick

Tue 9/30

3:40 pm-10:45 pm

2 stops38h 05m

$833

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

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, November is the cheapest month in which you can book a flight from Idaho to London (average of $661). Flying from Idaho to London in June is currently the most expensive (average of $1,115). 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 March 28, 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 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 March 28, 2025.
Peruse reviews from past customers who have flown with Delta, Alaska Airlines and KLM from Idaho to London to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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
7,897 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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
9,798 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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
1,321 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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
1,267 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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.
SWISS
7.5
Good
1,570 reviews
Delta
8.0
Very good
7,897 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

8.0

Overall

8.0

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 airlines for a one-way flight from Idaho to London are Scandinavian Airlines ($459), Air Canada ($552), and KLM ($556).

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

    The most popular flight routes from Idaho to London are Boise Air Term. Gowen Fld - London Heathrow, Spokane - London Heathrow and Boise Air Term. Gowen Fld - 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, November is the cheapest month in which you can book a flight from Idaho to London (average of $661). Flying from Idaho to London in June is currently the most expensive (average of $1,115). 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 Idaho?

Book flights to Idaho if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Luton
Wembley
Harrow
Horley
Canterbury
Gatwick
Dover
Orpington
Watford
Milton Keynes
Croydon
Borehamwood
Bromley
Folkestone
Ilford
Aylesbury
Sutton

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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 4 airlines flying from Idaho to London

Discover the top 4 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$687Average$1,206FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$695Average$893FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$697Average$857FlexibilityNo cancel feeOn-time71%
DeltaCheapest$727Average$1,137FlexibilityNo cancel feeOn-timeN/A
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