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Cheap flights from Idaho to London Heathrow Airport from £151

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 27/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
26 Jul — 2 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Idaho to Heathrow

Enter your travel dates to find the best prices.

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 26 June 2026.

Wed 19/817:00
BOI
-
LHR
1 stop15h 00m
Virgin Atlantic
Mon 31/806:30
LHR
-
BOI
2 stops19h 18m
Virgin Atlantic
Deal found 24/6£384
Thu 10/916:00
BOI
-
LHR
1 stop18h 35m
Virgin Atlantic
Sat 26/909:55
LHR
-
BOI
1 stop20h 04m
Virgin Atlantic
Deal found 23/6£415
Wed 7/1018:01
BOI
-
LHR
1 stop14h 04m
Alaska Airlines
Tue 13/1017:00
LHR
-
BOI
1 stop13h 58m
Alaska Airlines
Deal found 26/6£486
Sun 18/1018:01
BOI
-
LHR
1 stop14h 04m
Alaska Airlines
Mon 2/1114:45
LHR
-
BOI
1 stop14h 35m
Alaska Airlines
Deal found 26/6£524
Sun 1/1117:44
BOI
-
LHR
2 stops29h 56m
United Airlines
Wed 4/1106:35
LHR
-
BOI
2 stops21h 44m
United Airlines
Deal found 25/6£570
Sun 20/905:00
GEG
-
LHR
1 stop20h 40m
United Airlines
Tue 22/907:30
LHR
-
GEG
2 stops21h 44m
United Airlines
Deal found 22/6£575
Mon 30/1117:40
IDA
-
LHR
1 stop33h 00m
United Airlines
Thu 3/1206:35
LHR
-
IDA
2 stops33h 53m
United Airlines
Deal found 26/6£635
Tue 10/1112:32
BOI
-
LHR
2 stops20h 18m
Lufthansa
Tue 17/1107:40
LHR
-
BOI
2 stops20h 50m
Lufthansa
Deal found 22/6£657
Mon 5/1006:44
BOI
-
LHR
1 stop19h 16m
Iberia
Thu 5/1106:15
LHR
-
BOI
2 stops22h 48m
Iberia
Deal found 22/6£659
Tue 13/1012:45
GEG
-
LHR
1 stop16h 05m
Iberia
Tue 20/1006:15
LHR
-
GEG
2 stops22h 32m
Iberia
Deal found 22/6£660
Wed 23/905:00
GEG
-
LHR
1 stop20h 40m
United Airlines
Wed 14/1007:25
LHR
-
GEG
2 stops22h 51m
United Airlines
Deal found 23/6£662
Mon 26/1007:00
JAC
-
LHR
1 stop20h 40m
Multiple Airlines
Tue 3/1106:35
LHR
-
JAC
2 stops21h 27m
Multiple Airlines
Deal found 22/6£663

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 26 June 2026.

Round-trip from

£384

One-way from

£151

Popular in

January

Cheapest in

October

Average price

£971
Virgin Atlantic
  • Virgin Atlantic
  • 19/8-31/8
  • 3 total stops
  • 34h 18m total
  • Idaho to London
Search Deals
Virgin Atlantic
  • Virgin Atlantic
  • 27/11
  • 1 total stop
  • 16h 05m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 33% potential increase in price (£315 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 19% potential price decrease (£103 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 26 June 2026.
Use the filters below to find and compare flights from Idaho to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 30/11

17:40-09:40

1 stop33h 00m

London Heathrow

Thu 3/12

06:35-09:28

2 stops33h 53m

£635

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 8/11

12:50-11:15

1 stop14h 25m

London Heathrow

Thu 12/11

06:35-21:05

2 stops22h 30m

£662

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 14/10

05:00-06:30

2 stops17h 30m

London Heathrow

Wed 28/10

06:35-21:01

2 stops21h 26m

£665

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 13/10

05:00-10:00

2 stops21h 00m

London Heathrow

Thu 22/10

08:45-22:16

2 stops21h 31m

£665

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 29/9

10:30-09:20

2 stops15h 50m

London Heathrow

Wed 14/10

07:25-19:29

2 stops19h 04m

£666
Fastest return journey

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 29/9

19:48-15:05

1 stop12h 17m

London Heathrow

Wed 7/10

17:00-23:58

1 stop13h 58m

£669

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 7/10

10:35-11:35

2 stops18h 00m

London Heathrow

Tue 13/10

06:55-09:53

2 stops33h 58m

£669

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 25/10

05:00-07:10

2 stops19h 10m

London Heathrow

Mon 2/11

11:10-21:05

2 stops41h 55m

£672

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 7/10

13:46-15:05

1 stop18h 19m

London Heathrow

Tue 13/10

17:00-15:35

1 stop29h 35m

£674

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 6/10

19:30-15:35

1 stop13h 05m

London Heathrow

Wed 21/10

11:45-20:17

2 stops15h 32m

£683

Flights are sorted by cheapest return flights first.

Deals found on 24/6

Showing 1-10 of 53 resultsSorted by cheapest first
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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 return 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, July is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £437). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £949). 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.

How much does it cost for a return flight from Idaho to London Heathrow Airport?

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 United Airlines, Alaska Airlines, and Virgin Atlantic fly from Idaho to London Heathrow Airport in about 12h 17m. The time it takes to get you to your destination can typically vary by up to 20h 43m. There are 4829 mi between Idaho and London Heathrow Airport. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    The most popular route from Idaho to London Heathrow Airport is Boise Air Term. Gowen Fld - London Heathrow. You may also consider Spokane - London Heathrow or Idaho Falls Fanning Field - London Heathrow.

  • 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 holiday 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, July is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £437). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £949). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Milton Keynes
Wembley
Luton
Gatwick
Croydon
Ilford
Slough
Hayes
Brentford
Colchester
Northampton
Kingston upon Thames
Swindon
Eastbourne
Watford
Poole
Southall
Romford
Ipswich

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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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Boston to Stansted flights
Dulles Intl to London City flights
George Bush Intcntl to Heathrow flights
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Philadelphia to Heathrow flights
Los Angeles to Stansted flights
LaGuardia to Stansted flights
Baltimore to Gatwick flights
Reagan-National to Gatwick flights
O'Hare Intl to Gatwick flights
Sky Harbor Intl to Heathrow flights
Los Angeles to London City flights
Orlando to Gatwick flights
O'Hare Intl to Stansted flights
Dallas/Fort Worth to Gatwick flights
San Francisco to Gatwick flights
Austin to Heathrow flights
O'Hare Intl to London City flights
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Minneapolis to Heathrow flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Idaho to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Idaho to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Idaho to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow from Idaho by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Idaho to Heathrow with no change fees?

Need flexible booking options for your flight to Heathrow from Idaho? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Idaho to Heathrow become cheaper?

Not ready to book yet? You can track prices for flights from Idaho to Heathrow on Cheapflights with our Price Alert feature and get notified when better prices are available.

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