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 KLM ($483), United Airlines ($490), and Scandinavian Airlines ($528).

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.

What are the most popular airlines that fly from Idaho to London?

The most popular airlines flying from Idaho to London are American Airlines, Delta and KLM. Something to consider prior to booking your flight.

How far in advance should I book a flight from Idaho to London?

To save on the cost of your flight from Idaho to London, book at least 36 days before your planned departure. Booking around this time can save you about 48% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $726 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $1,265.

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

Our data shows that November tends to be the cheapest month to fly to London from Idaho. Users have commonly found prices around $913 for the month, but tickets can be as low as $641. Due to multiple factors, prepare for potentially higher prices in June.

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.

$275+ Flights from Idaho to London

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Cheap flight deals from Idaho to London

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$722 (FlightHub)
One-way from	$275 (Kiwi.com)
Popular in	June
Cheapest in	November
Average price	$804

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. 26% potential increase in price ($325 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($51 potential savings vs. average RT 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 April 22, 2025.

Tue 9/233:05 pmBOI - LHR

2 stops19h 35mScandinavian Airlines

Wed 10/16:40 amLHR - BOI

2 stops20h 36mScandinavian Airlines

Deal found 4/21

$722

Wed 12/317:30 amGEG - LHR

1 stop14h 25mUnited Airlines

Wed 1/142:30 pmLHR - GEG

2 stops28h 25mUnited Airlines

Deal found 4/21

$764

Sat 9/62:42 pmBOI - LHR

2 stops32h 48mUnited Airlines

Fri 9/199:30 amLHR - BOI

2 stops35h 05mUnited Airlines

Deal found 4/22

$765

Sun 9/142:00 pmBOI - LHR

1 stop17h 15mDelta

Wed 10/86:30 amLHR - BOI

2 stops16h 59mDelta

Deal found 4/21

$773

Wed 10/15:15 amGEG - LHR

2 stops17h 15mMultiple Airlines

Tue 10/73:50 pmLHR - GEG

3 stops28h 46mMultiple Airlines

Deal found 4/21

$775

Wed 12/319:10 amGEG - LHR

2 stops19h 05mDelta

Wed 1/146:30 amLHR - GEG

2 stops20h 16mDelta

Deal found 4/22

$778

Wed 9/37:30 amBOI - LHR

1 stop15h 55mFinnair

Tue 9/1610:30 amLHR - BOI

1 stop17h 44mFinnair

Deal found 4/21

$787

Wed 12/3110:10 amGEG - LHR

1 stop15h 50mKLM

Wed 1/1412:20 pmLHR - GEG

1 stop14h 26mKLM

Deal found 4/22

$787

Fri 9/121:00 pmGEG - LHR

2 stops16h 35mScandinavian Airlines

Fri 9/266:40 amLHR - GEG

2 stops18h 17mScandinavian Airlines

Deal found 4/22

$792

Sat 9/61:41 pmBOI - LHR

1 stop33h 44mIberia

Fri 9/1910:30 amLHR - BOI

1 stop17h 44mIberia

Deal found 4/22

$793

Wed 9/35:00 amBOI - LHR

3 stops18h 35mMultiple Airlines

Tue 9/169:30 amLHR - BOI

2 stops18h 44mMultiple Airlines

Deal found 4/21

$798

Wed 9/35:00 amBOI - LHR

3 stops18h 35mAir Canada

Tue 9/168:30 amLHR - BOI

3 stops18h 03mAir Canada

Deal found 4/22

$804

Best flights from Idaho to London
Discover carefully curated flight deals from Idaho to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 22, 2025.

Tue 9/233:05 pmBOI - LHR

2 stops19h 35mScandinavian Airlines

Wed 10/16:40 amLHR - BOI

2 stops20h 36mScandinavian Airlines

Deal found 4/21

$722

Sat 9/62:42 pmBOI - LHR

2 stops32h 48mUnited Airlines

Fri 9/199:30 amLHR - BOI

2 stops35h 05mUnited Airlines

Deal found 4/22

$765

Sun 9/142:00 pmBOI - LHR

1 stop17h 15mDelta

Wed 10/86:30 amLHR - BOI

2 stops16h 59mDelta

Deal found 4/21

$773

Wed 10/15:15 amGEG - LHR

2 stops17h 15mMultiple Airlines

Tue 10/73:50 pmLHR - GEG

3 stops28h 46mMultiple Airlines

Deal found 4/21

$775

Wed 10/15:15 amGEG - LHR

2 stops17h 15mAir Canada

Tue 10/710:15 amLHR - GEG

2 stops21h 00mAir Canada

Deal found 4/21

$778

Wed 9/37:30 amBOI - LHR

1 stop15h 55mFinnair

Tue 9/1610:30 amLHR - BOI

1 stop17h 44mFinnair

Deal found 4/21

$787

Wed 10/13:05 pmGEG - LHR

1 stop15h 10mKLM

Tue 10/710:55 amLHR - GEG

1 stop13h 12mKLM

Deal found 4/21

$787

Sat 9/61:41 pmBOI - LHR

1 stop33h 44mIberia

Fri 9/1910:30 amLHR - BOI

1 stop17h 44mIberia

Deal found 4/22

$793

Tue 8/122:32 pmBOI - LHR

2 stops17h 08mLufthansa

Mon 8/258:25 pmLHR - BOI

2 stops31h 49mLufthansa

Deal found 4/22

$808

Wed 10/112:39 pmGEG - LGW

2 stops18h 01mIcelandair

Tue 10/73:40 pmLGW - GEG

2 stops16h 19mIcelandair

Deal found 4/21

$850

Fri 8/152:32 pmBOI - LGW

2 stops20h 18mSWISS

Sun 8/316:40 pmLGW - BOI

2 stops33h 34mSWISS

Deal found 4/21

$904

Mon 7/283:05 pmIDA - LHR

2 stops32h 40mVirgin Atlantic

Thu 8/75:25 pmLHR - IDA

2 stops59h 50mVirgin Atlantic

Deal found 4/22

$1,032

Last-minute flights from Idaho to London
Discover last-minute flight deals from Idaho to London. Data last updated April 22, 2025 and is based on user searches.

Mon 4/2812:06 pmBOI - LCY

2 stops21h 19mLufthansa

Wed 4/308:45 amLCY - BOI

2 stops19h 37mLufthansa

Deal found 4/21

$1,844

Mon 4/287:05 amBOI - LHR

1 stop20h 45mFinnair

Wed 4/3012:00 pmLHR - BOI

1 stop17h 11mFinnair

Deal found 4/21

$1,889

Mon 4/281:10 pmBOI - LHR

3 stops25h 25mScandinavian Airlines

Wed 4/306:40 amLHR - BOI

3 stops21h 54mScandinavian Airlines

Deal found 4/21

$2,915

Fri 5/24:20 pmBOI - LHR

2 stops21h 00mIcelandair

Thu 5/159:25 pmLHR - BOI

2 stops56h 19mIcelandair

Deal found 4/21

$952

Fri 5/24:20 pmBOI - LGW

2 stops15h 20mIcelandair

Thu 5/153:40 pmLGW - BOI

2 stops38h 02mIcelandair

Deal found 4/21

$970

Fri 5/212:05 pmBOI - LHR

1 stop16h 40mUnited Airlines

Thu 5/1510:50 amLHR - BOI

2 stops19h 02mUnited Airlines

Deal found 4/21

$997

Fri 5/22:15 pmBOI - LHR

1 stop13h 55mKLM

Thu 5/151:05 pmLHR - BOI

1 stop16h 44mKLM

Deal found 4/21

$1,012

Fri 5/25:00 amBOI - LHR

3 stops18h 35mMultiple Airlines

Thu 5/159:30 amLHR - BOI

2 stops19h 12mMultiple Airlines

Deal found 4/21

$1,223

Fri 5/25:00 amBOI - LHR

3 stops18h 35mAir Canada

Thu 5/158:30 amLHR - BOI

3 stops21h 22mAir Canada

Deal found 4/21

$1,697

Sun 5/44:10 pmGEG - LHR

1 stop12h 10mUnited Airlines

Wed 5/142:05 pmLHR - GEG

2 stops32h 36mUnited Airlines

Deal found 4/21

$939

Sun 5/43:35 pmGEG - LHR

1 stop14h 40mKLM

Wed 5/1411:00 amLHR - GEG

1 stop13h 00mKLM

Deal found 4/22

$962

Sun 5/45:29 amGEG - LHR

2 stops17h 01mMultiple Airlines

Wed 5/143:50 pmLHR - GEG

3 stops28h 48mMultiple Airlines

Deal found 4/22

$973

One-way flights from Idaho to London
Search for one-way flight options from Idaho to London. Find affordable one-way fares based on user searches. Data last updated April 22, 2025.

Fri 7/115:52 pmGEG - LGW

1 stop33h 03mMultiple Airlines

Deal found 4/22

$275

Tue 9/2311:19 amBOI - LHR

2 stops17h 36mMultiple Airlines

Deal found 4/21

$430

Mon 7/214:17 pmBOI - LHR

1 stop14h 58mKLM

Deal found 4/21

$483

Mon 7/217:15 pmBOI - LHR

3 stops28h 20mUnited Airlines

Deal found 4/21

$490

Sat 7/126:05 amGEG - LHR

2 stops42h 10mMultiple Airlines

Deal found 4/22

$500

Fri 9/121:00 pmGEG - LHR

2 stops16h 35mScandinavian Airlines

Deal found 4/21

$528

Fri 9/123:46 pmGEG - LHR

1 stop14h 54mAmerican Airlines

Deal found 4/21

$533

Fri 7/1111:37 amGEG - LHR

2 stops58h 58mAir Canada

Deal found 4/22

$564

Sat 7/1212:40 pmGEG - LHR

1 stop34h 35mDelta

Deal found 4/22

$574

Sun 5/43:35 pmGEG - LHR

1 stop14h 40mKLM

Deal found 4/22

$576

Sun 5/46:00 amGEG - LCY

2 stops22h 30mUnited Airlines

Deal found 4/22

$612

Thu 7/1011:44 amGEG - LCY

3 stops21h 56mMultiple Airlines

Deal found 4/22

$615

Cheapflights Fare Finder

Use the filters below to find and compare flights from Idaho to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 9/23

3:05 pm-5:40 pm

2 stops19h 35m

London Heathrow

Wed 10/1

6:40 am-8:16 pm

2 stops20h 36m

$722

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sat 9/6

2:42 pm-6:30 am

2 stops32h 48m

London Heathrow

Fri 9/19

9:30 am-1:35 pm

2 stops35h 05m

$765

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 10/1

1:38 pm-12:20 pm

1 stop14h 42m

London Heathrow

Tue 10/7

3:50 pm-11:27 am

2 stops27h 37m

$770

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 9/14

2:00 pm-2:15 pm

1 stop17h 15m

London Heathrow

Wed 10/8

6:30 am-4:29 pm

2 stops16h 59m

$773

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 10/1

5:15 am-6:30 am

2 stops17h 15m

London Heathrow

Tue 10/7

3:50 pm-12:36 pm

3 stops28h 46m

$775

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 10/1

5:15 am-6:30 am

2 stops17h 15m

London Heathrow

Tue 10/7

10:15 am-11:15 pm

2 stops21h 00m

$778

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 9/3

7:30 am-6:25 am

1 stop15h 55m

London Heathrow

Tue 9/16

10:30 am-9:14 pm

1 stop17h 44m

$787

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 10/1

3:05 pm-2:15 pm

1 stop15h 10m

London Heathrow

Tue 10/7

10:55 am-4:07 pm

1 stop13h 12m

$787

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Fri 9/12

1:00 pm-1:35 pm

2 stops16h 35m

London Heathrow

Fri 9/26

6:40 am-4:57 pm

2 stops18h 17m

$792

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sat 9/6

1:41 pm-6:25 am

1 stop33h 44m

London Heathrow

Fri 9/19

10:30 am-9:14 pm

1 stop17h 44m

$793

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 59 results

...

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 $1,110). 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?

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

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

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

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

7,920 reviews

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

7,920 reviews

Delta

8.0

Very good

7,920 reviews

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

9,906 reviews

Delta

8.0

Very good

7,920 reviews

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

1,331 reviews

Delta

8.0

Very good

7,920 reviews

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

1,272 reviews

Delta

8.0

Very good

7,920 reviews

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

1,582 reviews

Delta

8.0

Very good

7,920 reviews

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

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 KLM ($483), United Airlines ($490), and Scandinavian Airlines ($528).
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 $1,110). 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

Hayes

Hounslow

Thornton Heath

Luton

Horley

Canterbury

Harrow

Wembley

Dover

Gatwick

Orpington

Watford

Croydon

Borehamwood

Folkestone

Ilford

Aylesbury

Chelmsford

Sutton

Brentwood

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from Idaho to London

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest$555	Average$774	FlexibilityNo cancel fee	On-time75%
American Airlines	Cheapest$648	Average$865	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$687	Average$1,183	FlexibilityNo cancel fee	On-time69%
Virgin Atlantic	Cheapest$695	Average$887	FlexibilityNo cancel fee	On-time72%
Delta	Cheapest$727	Average$1,126	FlexibilityNo cancel fee	On-timeN/A

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$275+ 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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Idaho to London with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 April 22, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Idaho to London

Cheapest flights from Idaho to LondonExplore 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 April 22, 2025.

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 April 22, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Idaho to London that are best for you.

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.

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?

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 April 22, 2025.

Rainfall in London by month

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

Temperature in London by month

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

Reviews of airlines servicing London

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.

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?

What are the most popular routes from Idaho to London?

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

How can I find direct flights from Idaho to London?

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

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

Traveling to a place near Idaho?

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Alternative routes for Idaho to London

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Top 5 airlines flying from Idaho to London

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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 April 22, 2025.