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Cheap flights from Idaho to London Heathrow Airport from £232

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 20/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
18 Jul — 25 Jul1
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 18 June 2026.

Mon 26/1013:40
JAC
-
LHR
1 stop16h 35m
Multiple Airlines
Tue 3/1117:15
LHR
-
JAC
2 stops25h 59m
Multiple Airlines
Deal found 15/6£618
Tue 3/1113:11
JAC
-
LHR
2 stops15h 24m
Multiple Airlines
Tue 10/1117:15
LHR
-
JAC
2 stops25h 59m
Multiple Airlines
Deal found 16/6£621
Wed 7/1012:12
IDA
-
LHR
1 stop15h 43m
American Airlines
Tue 13/1008:15
LHR
-
IDA
2 stops20h 07m
American Airlines
Deal found 17/6£649
Wed 30/906:00
IDA
-
LHR
1 stop21h 00m
Delta
Thu 8/1011:45
LHR
-
IDA
2 stops41h 34m
Delta
Deal found 14/6£654
Mon 2/1111:35
JAC
-
LHR
1 stop15h 25m
KLM
Mon 9/1120:25
LHR
-
JAC
2 stops27h 04m
KLM
Deal found 16/6£654
Tue 29/914:14
BOI
-
LHR
1 stop16h 01m
Delta
Wed 7/1008:40
LHR
-
BOI
2 stops18h 37m
Delta
Deal found 15/6£654
Wed 23/905:40
GEG
-
LHR
1 stop20h 20m
Delta
Wed 14/1008:40
LHR
-
GEG
2 stops18h 47m
Delta
Deal found 16/6£654
Sun 8/1113:11
JAC
-
LHR
1 stop15h 49m
Multiple Airlines
Sun 15/1117:15
LHR
-
JAC
2 stops25h 59m
Multiple Airlines
Deal found 16/6£655
Tue 29/906:25
BOI
-
LHR
1 stop23h 00m
United Airlines
Wed 7/1007:25
LHR
-
BOI
2 stops19h 04m
United Airlines
Deal found 16/6£655
Wed 23/913:37
GEG
-
LHR
1 stop14h 58m
United Airlines
Wed 14/1008:40
LHR
-
GEG
2 stops21h 36m
United Airlines
Deal found 17/6£655
Tue 17/1107:05
GEG
-
LHR
1 stop21h 15m
Alaska Airlines
Tue 24/1114:45
LHR
-
GEG
1 stop17h 33m
Alaska Airlines
Deal found 15/6£656
Mon 26/1007:00
JAC
-
LHR
2 stops18h 10m
United Airlines
Tue 3/1106:35
LHR
-
JAC
2 stops21h 27m
United Airlines
Deal found 15/6£657

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 18 June 2026.

Round-trip from

£618

One-way from

£232

Popular in

January

Cheapest in

October

Average price

£958
26/10-3/11
  • 26/10-3/11
  • 3 total stops
  • 42h 34m total
  • Idaho to London
Search Deals
20/10
  • 20/10
  • 3 total stops
  • 34h 57m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 34% potential increase in price (£315 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 19% potential price decrease (£101 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 18 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

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Tue 3/11

13:10-10:00

1 stop13h 50m

London Heathrow

Wed 11/11

20:25-16:29

2 stops27h 04m

£654

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Mon 26/10

07:00-07:10

2 stops18h 10m

London Heathrow

Tue 3/11

06:35-21:02

2 stops21h 27m

£657

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Tue 10/11

13:10-11:40

2 stops15h 30m

London Heathrow

Mon 16/11

17:50-16:29

2 stops29h 39m

£658

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sat 3/10

16:08-09:40

1 stop33h 32m

London Heathrow

Tue 27/10

06:35-23:38

2 stops24h 03m

£658

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Mon 2/11

11:35-11:40

2 stops17h 05m

London Heathrow

Wed 11/11

20:25-16:29

2 stops27h 04m

£658

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 7/10

10:35-11:35

2 stops18h 00m

London Heathrow

Tue 13/10

07:25-09:53

2 stops33h 28m

£662

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 25/10

12:30-11:15

1 stop15h 45m

London Heathrow

Mon 2/11

11:10-21:09

2 stops41h 59m

£662

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 26/10

16:38-12:20

1 stop12h 42m

London Heathrow

Fri 30/10

14:45-23:54

1 stop16h 09m

£663

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 7/10

06:09-15:05

1 stop25h 56m

London Heathrow

Tue 13/10

17:00-15:35

1 stop29h 35m

£670

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 7/10

12:12-10:55

1 stop15h 43m

London Heathrow

Tue 13/10

11:00-21:22

1 stop17h 22m

£676

Flights are sorted by cheapest return flights first.

Deals found on 16/6

Showing 1-10 of 60 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 £431). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £936). 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, United Airlines, and Alaska Airlines fly from Idaho to London Heathrow Airport in about 13h 50m. The time it takes to get you to your destination can typically vary by up to 12h 06m. There are 4658 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 £431). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £936). 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
Slough
Ilford
Hayes
Brentford
Colchester
Northampton
Kingston upon Thames
Swindon
Eastbourne
Watford
Poole
Guildford
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 London City flights
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Los Angeles to Gatwick flights
Boston to Stansted flights
Baltimore to Gatwick flights
Philadelphia to Heathrow flights
Los Angeles to Stansted flights
Reagan-National to Gatwick flights
Los Angeles to London City flights
George Bush Intcntl to Heathrow flights
O'Hare Intl to Gatwick flights
O'Hare Intl to Stansted flights
San Francisco to Gatwick flights
Charlotte to Heathrow flights
O'Hare Intl to London City flights
Seattle to Gatwick flights
San Francisco to London City flights
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Sky Harbor Intl 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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