HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$334+ 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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho to Heathrow 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 Heathrow

Keep the following information in mind while searching for Idaho to Heathrow flight deals. Data was last updated June 12, 2025.

Round-trip from

$702
(FlightHub)

One-way from

$334
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$1,417
From Idaho to London Heathrow
Search Deals
One-way flight from Idaho to London Heathrow
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($273 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/10. 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 10/83:05 pmBOI - LHR
2 stops20h 25mScandinavian Airlines
Fri 10/1710:20 amLHR - BOI
2 stops19h 44mScandinavian Airlines
Deal found 6/10$702
This CheapOair deal was found by Cheapflights users on 6/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/121:00 pmGEG - LHR
2 stops36h 20mScandinavian Airlines
Fri 9/266:40 amLHR - GEG
2 stops18h 17mScandinavian Airlines
Deal found 6/10$719
This Air Canada deal was found by Cheapflights users on 6/11. 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.
Sun 11/96:20 amBOI - LHR
2 stops22h 30mAir Canada
Fri 11/212:30 pmLHR - BOI
2 stops30h 14mAir Canada
Deal found 6/11$728
This United Airlines deal was found by Cheapflights users on 6/11. 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 8/195:15 amGEG - LHR
1 stop23h 05mUnited Airlines
Fri 8/299:30 amLHR - GEG
2 stops33h 57mUnited Airlines
Deal found 6/11$728
This Iberia deal was found by Cheapflights users on 6/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/97:21 amBOI - LHR
1 stop17h 54mIberia
Wed 11/197:25 amLHR - BOI
2 stops20h 53mIberia
Deal found 6/11$733
This Booking.com deal was found by Cheapflights users on 6/11. 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.
Fri 11/711:25 amGEG - LHR
2 stops59h 05mMultiple Airlines
Tue 11/187:40 amLHR - GEG
2 stops21h 05mMultiple Airlines
Deal found 6/11$733
This United Airlines deal was found by Cheapflights users on 6/11. 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 10/2610:45 amJAC - LHR
1 stop16h 55mUnited Airlines
Thu 11/66:00 pmLHR - JAC
2 stops33h 37mUnited Airlines
Deal found 6/11$735
This United Airlines deal was found by Cheapflights users on 6/12. 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 9/310:40 amBOI - LHR
1 stop16h 00mUnited Airlines
Tue 9/167:25 amLHR - BOI
2 stops19h 08mUnited Airlines
Deal found 6/12$735
This Air Canada deal was found by Cheapflights users on 6/10. 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.
Mon 9/15:15 amGEG - LHR
2 stops44h 45mAir Canada
Tue 9/169:30 amLHR - GEG
2 stops45h 35mAir Canada
Deal found 6/10$740
This Air France deal was found by Cheapflights users on 6/12. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1211:30 amJAC - LHR
1 stop15h 30mAir France
Thu 11/206:20 amLHR - JAC
2 stops17h 02mAir France
Deal found 6/12$742
This United Airlines deal was found by Cheapflights users on 6/12. 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 8/35:00 amIDA - LHR
2 stops18h 20mUnited Airlines
Tue 8/192:50 pmLHR - IDA
1 stop13h 04mUnited Airlines
Deal found 6/12$744
This Iberia deal was found by Cheapflights users on 6/10. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/112:29 pmGEG - LHR
1 stop17h 56mIberia
Tue 9/168:00 pmLHR - GEG
2 stops34h 52mIberia
Deal found 6/10$745

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 June 12, 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

Wed 10/8

3:05 pm-6:30 pm

2 stops20h 25m

London Heathrow

Fri 10/17

10:20 am-11:04 pm

2 stops19h 44m

$702

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Fri 9/12

1:00 pm-9:20 am

2 stops36h 20m

London Heathrow

Fri 9/26

6:40 am-4:57 pm

2 stops18h 17m

$719

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 11/9

6:20 am-11:50 am

2 stops22h 30m

London Heathrow

Fri 11/21

2:30 pm-1:44 pm

2 stops30h 14m

$728

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 8/19

5:15 am-12:20 pm

1 stop23h 05m

London Heathrow

Fri 8/29

9:30 am-11:27 am

2 stops33h 57m

$728

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 11/9

7:21 am-8:15 am

1 stop17h 54m

London Heathrow

Wed 11/19

7:25 am-9:18 pm

2 stops20h 53m

$733

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Fri 11/7

11:25 am-6:30 am

2 stops59h 05m

London Heathrow

Tue 11/18

7:40 am-8:45 pm

2 stops21h 05m

$733

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Sun 10/26

10:45 am-9:40 am

1 stop16h 55m

London Heathrow

Thu 11/6

6:00 pm-8:37 pm

2 stops33h 37m

$735

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 9/3

10:40 am-9:40 am

1 stop16h 00m

London Heathrow

Tue 9/16

7:25 am-7:33 pm

2 stops19h 08m

$735

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 9/1

5:15 am-10:00 am

2 stops44h 45m

London Heathrow

Tue 9/16

9:30 am-11:05 pm

2 stops45h 35m

$740

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 11/12

11:30 am-10:00 am

1 stop15h 30m

London Heathrow

Thu 11/20

6:20 am-4:22 pm

2 stops17h 02m

$742

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 46 results
1
2
3
...
5

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 $1,108). 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 June 12, 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.

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport 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 Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, 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 Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated June 12, 2025.
Peruse reviews from past customers who have flown with Delta, Alaska Airlines and KLM from Idaho to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,290 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,950 reviews

Overall

8.0

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    $468 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on United Airlines and KLM, with prices starting from $475 and $513, respectively.

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

    Most travelers choose Boise Air Term. Gowen Fld - London Heathrow, Spokane - London Heathrow or Idaho Falls Fanning Field - 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 $1,108). 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
Hayes
Hounslow
Thornton Heath
Luton
Canterbury
Harrow
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Folkestone
Borehamwood
Broadway
Sutton
Aylesbury
Chelmsford
Brentwood

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 Heathrow

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
Los Angeles to Heathrow flights
Boston to Heathrow flights
LaGuardia to Heathrow flights
Dulles Intl to Heathrow flights
John F Kennedy Intl to London City flights
Newark to Gatwick flights
Seattle to Heathrow flights
San Francisco to Heathrow flights
O'Hare Intl to Heathrow flights
Dallas/Fort Worth to Heathrow flights
Baltimore to Heathrow flights
Boston to Gatwick flights
LaGuardia to Gatwick flights
John F Kennedy Intl to Stansted flights
Newark to London City flights
Atlanta to Heathrow flights
Miami to Heathrow flights
Dulles Intl to Gatwick flights
Reagan-National to Heathrow flights
Dulles Intl to London City flights
Denver to Heathrow flights
John F Kennedy Intl to Luton flights
Boston to London City flights
Los Angeles to London City flights
Orlando to Heathrow flights
Baltimore to Gatwick flights
Hobby to Heathrow flights
Los Angeles to Gatwick flights
Philadelphia to Heathrow flights
Reagan-National to Gatwick flights
Dallas/Fort Worth to Gatwick flights
Seattle to Gatwick flights
Minneapolis to Heathrow flights
O'Hare Intl to Gatwick flights
San Francisco to Gatwick flights
Detroit to Heathrow flights
O'Hare Intl to London City flights
Newark to Stansted flights
George Bush Intcntl to Heathrow flights
Sky Harbor Intl to Heathrow flights
San Francisco to London City flights
Boston to Stansted flights
Portland to Heathrow flights
Seattle to London City flights
Newark to Luton flights
Charlotte to Heathrow flights
Austin to Heathrow 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$555Average$774FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$685Average$1,004FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$695Average$996FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$703Average$865FlexibilityNo cancel feeOn-time71%
DeltaCheapest$727Average$1,083FlexibilityNo 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.