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$300+ Cheap flights from Idaho to Heathrow (LHR)

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 10/24. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Idaho to Heathrow

Keep the following information in mind while searching for Idaho to Heathrow flight deals. Data was last updated September 16, 2025.

Round-trip from

$597
(Netflights)

One-way from

$300
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$796
From Idaho to London Heathrow
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One-way flight from Idaho to London Heathrow
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Highest demand for flights based on searches. 23% potential increase in price ($278 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 September 2025
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Find flight deals from Idaho to Heathrow

Cheapest flights from Idaho to Heathrow
Explore the most affordable flight options available from Idaho to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Netflights deal was found by Cheapflights users on 9/13. 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.
Wed 10/291:39 pmBOI - LHR
1 stop13h 21mVirgin Atlantic
Wed 11/511:20 amLHR - BOI
1 stop18h 32mVirgin Atlantic
Deal found 9/13$597
This Scandinavian Airlines deal was found by Cheapflights users on 9/14. 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.
Thu 11/133:54 pmBOI - LHR
2 stops22h 46mScandinavian Airlines
Fri 12/56:40 amLHR - BOI
2 stops22h 56mScandinavian Airlines
Deal found 9/14$604
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 9/235:39 pmBOI - LHR
1 stop11h 41mUnited Airlines
Wed 10/19:30 amLHR - BOI
2 stops33h 09mUnited Airlines
Deal found 9/15$608
This Air Canada deal was found by Cheapflights users on 9/16. 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 11/196:20 amBOI - LHR
2 stops20h 50mAir Canada
Wed 11/2611:10 amLHR - BOI
2 stops33h 34mAir Canada
Deal found 9/16$615
This KLM deal was found by Cheapflights users on 9/13. 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 10/291:39 pmBOI - LHR
1 stop13h 21mKLM
Wed 11/56:30 amLHR - BOI
2 stops16h 36mKLM
Deal found 9/13$616
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/292:31 pmBOI - LHR
2 stops14h 44mUnited Airlines
Wed 11/511:10 amLHR - BOI
2 stops18h 35mUnited Airlines
Deal found 9/13$621
This Delta deal was found by Cheapflights users on 9/14. 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.
Wed 11/127:30 amBOI - LHR
1 stop20h 00mDelta
Thu 11/208:55 amLHR - BOI
2 stops20h 30mDelta
Deal found 9/14$623
This Delta deal was found by Cheapflights users on 9/16. 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.
Wed 11/51:15 pmGEG - LHR
1 stop13h 15mDelta
Wed 11/196:20 amLHR - GEG
2 stops20h 38mDelta
Deal found 9/16$623
This Delta deal was found by Cheapflights users on 9/14. 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 10/142:00 pmBOI - LHR
1 stop14h 20mDelta
Tue 10/216:30 amLHR - BOI
2 stops20h 46mDelta
Deal found 9/14$624
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/122:31 pmBOI - LHR
1 stop12h 09mUnited Airlines
Mon 11/174:40 pmLHR - BOI
2 stops32h 29mUnited Airlines
Deal found 9/15$626
This Delta deal was found by Cheapflights users on 9/15. 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 9/2311:00 amBOI - LHR
2 stops19h 10mDelta
Wed 10/111:30 amLHR - BOI
2 stops19h 27mDelta
Deal found 9/15$627
This Delta deal was found by Cheapflights users on 9/15. 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 12/26:00 amGEG - LHR
1 stop17h 05mDelta
Fri 12/1211:05 amLHR - GEG
1 stop17h 04mDelta
Deal found 9/15$631

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Heathrow 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 September 16, 2025.
Use the filters below to find and compare flights from Idaho to London Heathrow Airport that are best for you.

Fly from

Idaho

Fly to

Heathrow

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Thu 11/13

3:54 pm-9:40 pm

2 stops22h 46m

London Heathrow

Fri 12/5

6:40 am-10:36 pm

2 stops22h 56m

$604

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 9/23

5:00 am-9:40 am

1 stop21h 40m

London Heathrow

Wed 10/1

9:30 am-11:39 am

2 stops33h 09m

$608

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 10/29

1:39 pm-9:00 am

1 stop13h 21m

London Heathrow

Wed 11/5

6:30 am-4:06 pm

2 stops16h 36m

$616

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 10/29

2:31 pm-11:15 am

2 stops14h 44m

London Heathrow

Wed 11/5

11:10 am-10:45 pm

2 stops18h 35m

$621

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 11/5

1:15 pm-10:30 am

1 stop13h 15m

London Heathrow

Wed 11/19

6:20 am-6:58 pm

2 stops20h 38m

$623

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 11/12

11:19 am-10:30 am

1 stop15h 11m

London Heathrow

Wed 12/3

6:20 am-6:56 pm

2 stops20h 36m

$623

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 10/14

2:00 pm-11:20 am

1 stop14h 20m

London Heathrow

Tue 10/21

6:30 am-8:16 pm

2 stops20h 46m

$624

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 11/12

6:15 am-9:40 am

1 stop20h 25m

London Heathrow

Mon 11/17

4:40 pm-7:45 pm

2 stops34h 05m

$626

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 9/23

11:00 am-1:10 pm

2 stops19h 10m

London Heathrow

Wed 10/1

11:30 am-11:57 pm

2 stops19h 27m

$627

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 10/15

1:10 pm-9:50 am

1 stop12h 40m

London Heathrow

Wed 10/29

12:20 pm-6:43 pm

1 stop13h 23m

$631

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

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

Currently, November is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of $661). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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 LHR?

Find hourly flight availability from Idaho to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 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 Heathrow Airport as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Heathrow. 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 Heathrow Airport?

    Airlines like Scandinavian Airlines, United Airlines, and Delta fly from Idaho to London Heathrow Airport in about 13h 15m. The time it takes to get you to your destination can typically vary by up to 9h 31m. Idaho and London Heathrow Airport are separated by a distance of 4643 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Idaho to London Heathrow Airport one-way?

    $449 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Iberia and United Airlines, with prices starting from $449 and $463, respectively.

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

    Most travelers choose Spokane - London Heathrow, Boise Air Term. Gowen Fld - London Heathrow or Jackson Hole - London Heathrow when deciding on the best route from Idaho to London Heathrow Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Idaho to Heathrow 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 Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of $661). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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 Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone
Chichester

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Idaho to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Los Angeles to London City flights
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O'Hare Intl to London City flights
Los Angeles to Gatwick flights
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Boston to Stansted flights
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LaGuardia to London City flights
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San Diego to Heathrow flights
Boston to Luton flights

Top 5 airlines flying from Idaho to Heathrow

Discover the top 5 airlines that operate flights from Idaho to Heathrow. 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$577Average$774FlexibilityNo cancel feeOn-time75%
DeltaCheapest$691Average$1,138FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$695Average$977FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$697Average$977FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$703Average$865FlexibilityNo cancel feeOn-time71%

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