HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
London

$499+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LON
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho to London with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$666
(Gotogate)

One-way from

$499
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$787
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. 28% potential increase in price ($370 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

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 February 20, 2025.

This Gotogate deal was found by Cheapflights users on 2/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1512:06 pmBOI - LHR
2 stops35h 29mAir Canada
Tue 4/222:05 pmLHR - BOI
2 stops29h 05mAir Canada
Deal found 2/20$666
This Netflights deal was found by Cheapflights users on 2/20. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/152:10 pmBOI - LHR
1 stop14h 15mVirgin Atlantic
Tue 4/2212:25 pmLHR - BOI
1 stop18h 34mVirgin Atlantic
Deal found 2/20$674
This KLM deal was found by Cheapflights users on 2/19. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/91:00 pmIDA - LHR
2 stops17h 40mKLM
Tue 3/255:50 pmLHR - IDA
2 stops30h 23mKLM
Deal found 2/19$676
This United Airlines deal was found by Cheapflights users on 2/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1911:10 amBOI - LHR
1 stop18h 50mUnited Airlines
Wed 3/263:00 pmLHR - BOI
2 stops36h 29mUnited Airlines
Deal found 2/19$677
This United Airlines deal was found by Cheapflights users on 2/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/24:08 pmGEG - LHR
1 stop12h 12mUnited Airlines
Wed 4/97:25 amLHR - GEG
2 stops22h 01mUnited Airlines
Deal found 2/19$688
This United Airlines deal was found by Cheapflights users on 2/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/92:35 pmIDA - LHR
1 stop13h 05mUnited Airlines
Tue 3/2511:35 amLHR - IDA
1 stop15h 31mUnited Airlines
Deal found 2/19$690
This StudentUniverse deal was found by Cheapflights users on 2/18. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/157:05 amBOI - LHR
1 stop16h 20mFinnair
Tue 4/2212:00 pmLHR - BOI
1 stop17h 11mFinnair
Deal found 2/18$692
This Delta deal was found by Cheapflights users on 2/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1511:25 amBOI - LHR
2 stops18h 45mDelta
Tue 4/226:30 amLHR - BOI
2 stops17h 33mDelta
Deal found 2/18$693
This Expedia deal was found by Cheapflights users on 2/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/197:05 amBOI - LHR
1 stop17h 15mIberia
Wed 3/269:25 amLHR - BOI
1 stop18h 30mIberia
Deal found 2/19$700
This Kissandfly.com deal was found by Cheapflights users on 2/19. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/92:35 pmIDA - LHR
1 stop13h 05mLufthansa
Tue 3/254:00 pmLHR - IDA
2 stops31h 03mLufthansa
Deal found 2/19$704
This SmartFares deal was found by Cheapflights users on 2/20. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/257:15 amBOI - LHR
2 stops27h 25mScandinavian Airlines
Tue 3/46:40 pmLHR - BOI
2 stops34h 41mScandinavian Airlines
Deal found 2/20$723
This Expedia deal was found by Cheapflights users on 2/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/152:38 pmBOI - LCY
2 stops18h 47mLufthansa
Tue 4/228:45 amLCY - BOI
2 stops19h 37mLufthansa
Deal found 2/18$741

Find flights from Idaho to London within your budget

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 February 20, 2025.

Fly from

Idaho

Fly to

London

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 4/15

12:06 pm-6:35 am

2 stops35h 29m

London Heathrow

Tue 4/22

2:05 pm-12:10 pm

2 stops29h 05m

$666

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 4/15

2:10 pm-11:25 am

1 stop14h 15m

London Heathrow

Tue 4/22

12:25 pm-11:59 pm

1 stop18h 34m

$674

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Sun 3/9

1:00 pm-12:40 pm

2 stops17h 40m

London Heathrow

Tue 3/25

5:50 pm-6:13 pm

2 stops30h 23m

$676

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/19

11:10 am-12:00 pm

1 stop18h 50m

London Heathrow

Wed 3/26

3:00 pm-9:29 pm

2 stops36h 29m

$677

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 4/2

4:08 pm-12:20 pm

1 stop12h 12m

London Heathrow

Wed 4/9

7:25 am-9:26 pm

2 stops22h 01m

$688

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Sun 3/9

2:35 pm-9:40 am

1 stop13h 05m

London Heathrow

Tue 3/25

11:35 am-9:06 pm

1 stop15h 31m

$690

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 4/15

7:05 am-6:25 am

1 stop16h 20m

London Heathrow

Tue 4/22

12:00 pm-10:11 pm

1 stop17h 11m

$692

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 4/15

11:25 am-1:10 pm

2 stops18h 45m

London Heathrow

Tue 4/22

6:30 am-5:03 pm

2 stops17h 33m

$693

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/19

7:05 am-6:20 am

1 stop17h 15m

London Heathrow

Wed 3/26

9:25 am-9:55 pm

1 stop18h 30m

$700

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Sun 3/9

2:35 pm-9:40 am

1 stop13h 05m

London Heathrow

Tue 3/25

4:00 pm-5:03 pm

2 stops31h 03m

$704

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 47 results
1
2
3
...
5

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.

Travel insights for flights from Idaho to London

Get recent, data-driven insights about flights from Idaho to London including ideal travel times, pricing trends, and more.

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 $1,136). 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 February 20, 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 February 20, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair 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
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

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
8,219 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

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
1,333 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

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
1,274 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

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
1,568 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

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.

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very good
8,219 reviews

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

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 United Airlines ($514), Virgin Atlantic ($532), and WestJet ($547).

  • 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 $1,136). 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
Harrow
Luton
Wembley
Horley
Canterbury
Gatwick
Milton Keynes
Dover
Orpington
Watford
Croydon
Borehamwood
Bromley
Folkestone
Ilford
Aylesbury
Chelmsford

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 Idaho to London

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Gatwick flights
LaGuardia to Heathrow flights
John F Kennedy Intl to London City flights
Los Angeles to Heathrow flights
Newark to Gatwick flights
Dulles Intl to Heathrow flights
Boston to Heathrow flights
San Francisco to Heathrow flights
O'Hare Intl to Heathrow flights
Baltimore to Heathrow flights
Newark to London City flights
Seattle to Heathrow flights
Stewart to Stansted flights
Dallas/Fort Worth to Heathrow flights
Atlanta to Heathrow flights
Boston to Gatwick flights
Denver to Heathrow flights
Miami to Heathrow flights
Reagan-National to Heathrow flights
Dulles Intl to Gatwick flights
John F Kennedy Intl to Luton flights
Dulles Intl to London City flights
Boston to London City flights
Los Angeles to London City flights
Orlando to Heathrow flights
Hobby to Heathrow flights
John F Kennedy Intl to Stansted flights
John F Kennedy Intl to Edinburgh flights
Minneapolis to Heathrow flights
Baltimore to Gatwick flights
George Bush Intcntl to Heathrow flights
LaGuardia to Gatwick flights
Newark to Edinburgh flights
Boston to Stansted flights
Philadelphia to Heathrow flights
San Francisco to London City flights
O'Hare Intl to Gatwick flights
San Francisco to Gatwick flights
O'Hare Intl to London City flights
Los Angeles to Gatwick flights
Tampa to Heathrow flights
Sky Harbor Intl to Heathrow flights
Seattle to Gatwick flights
Detroit to Heathrow flights
Austin to Heathrow flights
Newark to Luton flights
Reagan-National to Gatwick flights
Baltimore to Stansted flights

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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$670Average$1,020FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$695Average$946FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$697Average$861FlexibilityNo cancel feeOn-time71%
DeltaCheapest$698Average$1,133FlexibilityNo cancel feeOn-timeN/A
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.