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Cheap flights from Idaho to London Heathrow Airport from £214

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 26/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
12 Apr — 19 Apr1
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 13 March 2026.

Tue 15/912:42
BOI
-
LHR
2 stops21h 58m
Scandinavian Airlines
Tue 22/910:20
LHR
-
BOI
2 stops19h 44m
Scandinavian Airlines
Deal found 9/3£542
Tue 15/913:00
GEG
-
LHR
2 stops20h 40m
Scandinavian Airlines
Sat 26/906:40
LHR
-
GEG
2 stops20h 07m
Scandinavian Airlines
Deal found 9/3£542
Wed 28/1012:29
JAC
-
LHR
1 stop21h 01m
Multiple Airlines
Wed 4/1115:00
LHR
-
JAC
1 stop28h 14m
Multiple Airlines
Deal found 9/3£563
Sat 22/815:30
BOI
-
LHR
2 stops41h 30m
Scandinavian Airlines
Sat 5/914:20
LHR
-
BOI
2 stops39h 44m
Scandinavian Airlines
Deal found 10/3£574
Wed 12/806:00
GEG
-
LHR
1 stop19h 00m
Iberia
Tue 15/906:15
LHR
-
GEG
2 stops24h 07m
Iberia
Deal found 12/3£582
Wed 2/915:30
BOI
-
LHR
2 stops20h 00m
Scandinavian Airlines
Tue 27/1006:40
LHR
-
BOI
2 stops22h 28m
Scandinavian Airlines
Deal found 10/3£583
Wed 9/912:15
GEG
-
LHR
1 stop16h 35m
Iberia
Wed 7/1006:30
LHR
-
GEG
2 stops23h 49m
Iberia
Deal found 12/3£585
Sat 3/1012:42
BOI
-
LHR
3 stops21h 18m
Scandinavian Airlines
Mon 12/1006:40
LHR
-
BOI
2 stops23h 28m
Scandinavian Airlines
Deal found 10/3£593
Mon 17/813:36
BOI
-
LHR
1 stop17h 49m
Iberia
Tue 25/808:55
LHR
-
BOI
1 stop19h 45m
Iberia
Deal found 13/3£606
Wed 9/915:50
GEG
-
LHR
1 stop15h 15m
American Airlines
Wed 7/1008:55
LHR
-
GEG
1 stop21h 24m
American Airlines
Deal found 12/3£606
Sun 20/913:38
BOI
-
LHR
1 stop16h 12m
Multiple Airlines
Wed 30/916:10
LHR
-
BOI
1 stop14h 22m
Multiple Airlines
Deal found 12/3£607
Sat 3/1015:20
GEG
-
LHR
1 stop15h 45m
Alaska Airlines
Wed 7/1017:00
LHR
-
GEG
1 stop26h 05m
Alaska Airlines
Deal found 12/3£635

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 13 March 2026.

Round-trip from

£574

One-way from

£214

Popular in

January

Cheapest in

October

Average price

£620
Scandinavian Airlines
  • Scandinavian Airlines
  • 22/8-5/9
  • 4 total stops
  • 81h 14m total
  • Idaho to London
Search Deals
American Airlines
  • American Airlines
  • 26/7
  • 1 total stop
  • 13h 18m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£174 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease (£50 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 13 March 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

LewistonLondon

LWS - LHR

LWSLHR

Lewiston Nez Perce Rgnl

Tue 7/4

06:10-15:35

1 stop25h 25m

London Heathrow

Tue 21/4

06:30-00:08

2 stops25h 38m

£688

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 27/4

13:43-10:55

1 stop14h 12m

London Heathrow

Mon 4/5

16:10-23:39

1 stop14h 29m

£689

LewistonLondon

LWS - LHR

LWSLHR

Lewiston Nez Perce Rgnl

Tue 7/4

06:10-12:10

1 stop22h 00m

London Heathrow

Tue 21/4

17:45-00:08

1 stop14h 23m

£709

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 7/4

14:15-20:10

2 stops21h 55m

London Heathrow

Tue 14/4

10:45-21:05

2 stops18h 20m

£713

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 4/5

10:40-11:35

2 stops17h 55m

London Heathrow

Wed 20/5

16:40-09:50

2 stops24h 10m

£722

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 29/4

16:55-15:00

1 stop15h 05m

London Heathrow

Wed 6/5

09:55-21:24

2 stops18h 29m

£726

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 15/4

07:15-12:10

1 stop20h 55m

London Heathrow

Sat 25/4

06:30-18:57

2 stops20h 27m

£726

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Fri 1/5

14:14-10:50

1 stop13h 36m

London Heathrow

Sat 9/5

10:05-17:53

1 stop14h 48m

£727

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 18/8

14:45-12:10

1 stop14h 25m

London Heathrow

Wed 26/8

11:45-23:56

2 stops19h 11m

£742
Fastest return journey

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 28/4

17:29-12:25

1 stop11h 56m

London Heathrow

Sun 3/5

14:50-21:17

1 stop13h 27m

£747

Flights are sorted by cheapest return flights first.

Deals found on 12/3

Showing 1-10 of 59 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, October is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £468). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £817). 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 KLM, Delta, and Virgin Atlantic fly from Idaho to London Heathrow Airport in about 21h 55m. The time it takes to get you to your destination can typically vary by up to 3h 30m. There are 4643 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 Spokane - London Heathrow. You may also consider Boise Air Term. Gowen Fld - 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, October is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £468). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £817). 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
Milton Keynes
Wembley
Croydon
Northampton
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Chelmsford
Eastbourne
Ipswich
Swindon
Bedford

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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
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Los Angeles to Gatwick flights
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O'Hare Intl to Gatwick flights
Los Angeles to London City flights
San Francisco to Gatwick flights
O'Hare Intl to London City flights
George Bush Intcntl to Heathrow flights
O'Hare Intl to Stansted flights
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Dallas/Fort Worth to Gatwick flights
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LaGuardia to Stansted 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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