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Heathrow

$363+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
1 adult, Economy
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Cheap 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 February 4, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 2/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:00 am
GEG
-
LHR
2 stops24h 50m
Lufthansa
Mon 3/97:40 am
LHR
-
GEG
2 stops20h 38m
Lufthansa
Deal found 2/3$622
This United Airlines deal was found by Cheapflights users on 2/4. 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 3/45:33 pm
IDA
-
LHR
1 stop33h 07m
United Airlines
Wed 3/116:35 am
LHR
-
IDA
2 stops33h 21m
United Airlines
Deal found 2/4$633
This United Airlines deal was found by Cheapflights users on 2/4. 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 3/44:27 pm
JAC
-
LHR
1 stop34h 13m
United Airlines
Wed 3/116:35 am
LHR
-
JAC
2 stops20h 19m
United Airlines
Deal found 2/4$633
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/46:25 am
BOI
-
LHR
1 stop20h 15m
United Airlines
Wed 3/116:50 am
LHR
-
BOI
2 stops22h 06m
United Airlines
Deal found 2/3$633
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/47:00 am
GEG
-
LHR
1 stop16h 55m
United Airlines
Wed 3/116:35 am
LHR
-
GEG
2 stops36h 08m
United Airlines
Deal found 2/3$633
This Gotogate deal was found by Cheapflights users on 2/2. 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 3/37:00 am
GEG
-
LHR
2 stops17h 30m
Multiple Airlines
Tue 3/107:40 am
LHR
-
GEG
2 stops20h 38m
Multiple Airlines
Deal found 2/2$634
This United Airlines deal was found by Cheapflights users on 1/31. 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.
Mon 3/21:38 pm
JAC
-
LHR
1 stop16h 52m
United Airlines
Mon 3/97:40 am
LHR
-
JAC
2 stops19h 14m
United Airlines
Deal found 1/31$635
This United Airlines deal was found by Cheapflights users on 2/2. 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 3/37:00 am
GEG
-
LHR
1 stop14h 55m
United Airlines
Tue 3/106:35 am
LHR
-
GEG
2 stops21h 28m
United Airlines
Deal found 2/2$635
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Thu 3/55:00 am
GEG
-
LHR
2 stops18h 10m
United Airlines
Sat 3/146:35 am
LHR
-
GEG
2 stops21h 28m
United Airlines
Deal found 2/3$637
This Travelocity deal was found by Cheapflights users on 2/2. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/46:25 am
BOI
-
LHR
2 stops17h 45m
Multiple Airlines
Wed 3/117:40 am
LHR
-
BOI
2 stops19h 49m
Multiple Airlines
Deal found 2/2$638
This United Airlines deal was found by Cheapflights users on 2/2. 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 3/35:00 am
GEG
-
LHR
2 stops18h 10m
United Airlines
Sun 3/811:10 am
LHR
-
GEG
2 stops31h 33m
United Airlines
Deal found 2/2$638
This Delta deal was found by Cheapflights users on 2/3. 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 3/45:50 am
BOI
-
LHR
2 stops18h 15m
Delta
Wed 3/116:30 am
LHR
-
BOI
2 stops20h 39m
Delta
Deal found 2/3$639

Find flight deals from Idaho to Heathrow

Keep the following information in mind while searching for Idaho to Heathrow flight deals. Data was last updated February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$622
(Cheapflightsfares)

One-way from

$363
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$819
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 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 ($265 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 4, 2026.
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

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 3/4

1:44 pm-3:50 pm

2 stops18h 06m

London Heathrow

Wed 3/11

7:40 am-9:18 pm

2 stops20h 38m

$622

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 3/4

4:27 pm-9:40 am

1 stop34h 13m

London Heathrow

Wed 3/11

6:35 am-8:54 pm

2 stops20h 19m

$633

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Thu 3/5

1:37 pm-9:40 am

1 stop12h 03m

London Heathrow

Sat 3/14

6:35 am-9:03 pm

2 stops21h 28m

$633

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 3/4

12:38 pm-12:00 pm

1 stop15h 22m

London Heathrow

Wed 3/11

11:10 am-5:26 pm

2 stops37h 16m

$633

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 3/4

7:00 am-11:15 am

1 stop20h 15m

London Heathrow

Mon 3/9

7:40 am-9:18 pm

2 stops20h 38m

$633

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Mon 3/2

1:38 pm-1:30 pm

1 stop16h 52m

London Heathrow

Mon 3/9

7:40 am-8:54 pm

2 stops19h 14m

$635

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 3/4

2:40 pm-7:10 am

2 stops33h 30m

London Heathrow

Wed 3/11

6:35 am-9:56 am

2 stops33h 21m

$636

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 3/8

7:02 am-9:40 am

2 stops19h 38m

London Heathrow

Mon 3/16

7:40 am-9:03 pm

2 stops20h 23m

$638

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 4/7

5:20 pm-9:40 am

1 stop33h 20m

London Heathrow

Tue 4/14

6:55 am-9:53 am

2 stops33h 58m

$649

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Mon 4/13

2:18 pm-11:20 am

1 stop14h 02m

London Heathrow

Wed 4/22

6:30 am-4:14 pm

2 stops16h 44m

$651

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 59 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, October is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of $622). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of $1,085). 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.

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 Lufthansa, United Airlines, and Delta fly from Idaho to London Heathrow Airport in about 14h 02m. The time it takes to get you to your destination can typically vary by up to 20h 11m. Idaho and London Heathrow Airport are separated by a distance of 4829 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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, October is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of $622). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of $1,085). 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
Ilford
Hounslow
Croydon
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

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.
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Newark to Stansted flights
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Dulles Intl to London City flights
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O'Hare Intl to Gatwick flights
Los Angeles to Gatwick flights
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O'Hare Intl to London City flights
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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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$577Average$774FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$604Average$931FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$639Average$862FlexibilityNo cancel feeOn-time69%
DeltaCheapest$701Average$1,006FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$703Average$874FlexibilityNo cancel feeOn-time71%

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