Find flights
When to book
FAQs

Cheap flights from Idaho to London Heathrow Airport from £258

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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
2 Dec — 9 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 2 November 2025.

Wed 5/1112:51GEG - LHR
1 stop14h 49mMultiple Airlines
Wed 19/1106:20LHR - GEG
2 stops17h 28mMultiple Airlines
Deal found 2/11£449
Wed 19/1113:50BOI - LHR
1 stop13h 40mDelta
Wed 26/1106:30LHR - BOI
2 stops16h 35mDelta
Deal found 1/11£449
Wed 12/1113:15GEG - LHR
1 stop12h 45mDelta
Wed 3/1206:30LHR - GEG
2 stops21h 40mDelta
Deal found 1/11£450
Wed 5/1107:15GEG - LHR
2 stops15h 50mDelta
Wed 19/1106:20LHR - GEG
2 stops20h 13mDelta
Deal found 2/11£452
Wed 5/1112:51GEG - LHR
1 stop14h 49mKLM
Wed 19/1110:45LHR - GEG
1 stop15h 48mKLM
Deal found 2/11£454
Mon 1/1205:35BOI - LHR
1 stop18h 30mAir France
Wed 10/1210:45LHR - BOI
1 stop13h 31mAir France
Deal found 30/10£455
Wed 10/1205:35BOI - LHR
2 stops17h 45mVirgin Atlantic
Wed 17/1209:40LHR - BOI
2 stops21h 29mVirgin Atlantic
Deal found 1/11£458
Sun 7/1211:44BOI - LHR
1 stop15h 46mKLM
Sun 14/1211:20LHR - BOI
1 stop17h 45mKLM
Deal found 2/11£473
Sun 7/1213:12GEG - LHR
1 stop14h 28mKLM
Sun 14/1210:45LHR - GEG
1 stop15h 52mKLM
Deal found 2/11£473
Sun 7/1205:50BOI - LHR
2 stops19h 55mDelta
Sun 14/1210:45LHR - BOI
1 stop18h 26mDelta
Deal found 31/10£477
Sun 7/1206:00GEG - LHR
2 stops16h 50mMultiple Airlines
Sun 14/1210:45LHR - GEG
1 stop15h 52mMultiple Airlines
Deal found 2/11£477
Fri 7/1113:00JAC - LHR
1 stop14h 00mMultiple Airlines
Fri 14/1106:20LHR - JAC
2 stops17h 50mMultiple Airlines
Deal found 1/11£487

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 2 November 2025.

Round-trip from

£430

One-way from

£258

Popular in

June

Cheapest in

October

Average price

£721
Virgin Atlantic
  • Virgin Atlantic
  • 17/2-26/2
  • 2 total stops
  • 32h 39m total
  • Idaho to London
Search Deals
8/3
  • 8/3
  • 2 total stops
  • 18h 56m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£161 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£28 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
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 2 November 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

Tue 17/2

13:46-12:50

1 stop16h 04m

London Heathrow

Thu 26/2

11:05-20:57

1 stop16h 52m

£430

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

13:43-11:40

1 stop14h 57m

London Heathrow

Thu 26/2

06:20-16:26

2 stops17h 06m

£447

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/11

09:20-10:30

1 stop17h 10m

London Heathrow

Wed 3/12

06:20-18:56

2 stops20h 36m

£449

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 31/12

11:21-10:30

1 stop15h 09m

London Heathrow

Wed 14/1

06:20-18:47

2 stops20h 27m

£449

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 19/11

13:50-10:30

1 stop13h 40m

London Heathrow

Wed 26/11

06:30-16:05

2 stops16h 35m

£449

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Mon 1/12

15:54-16:50

1 stop17h 56m

London Heathrow

Wed 10/12

06:20-20:20

2 stops21h 00m

£449

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 31/12

12:02-11:40

1 stop15h 38m

London Heathrow

Wed 14/1

12:20-18:47

1 stop14h 27m

£454

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/11

11:19-10:30

1 stop15h 11m

London Heathrow

Wed 3/12

12:20-18:56

1 stop14h 36m

£454

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 13/1

11:20-10:00

1 stop15h 40m

London Heathrow

Tue 27/1

06:20-15:57

2 stops16h 37m

£455

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

13:46-12:50

1 stop16h 04m

London Heathrow

Tue 24/2

06:20-18:28

2 stops19h 08m

£455

Flights are sorted by cheapest return flights first.

Deals found on 2/11

Showing 1-10 of 36 results
1
2
3
4

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 £465). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £825). 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 2 November 2025.

It’s optimal to fly from Idaho to London Heathrow Airport in the evening. By choosing this option you can save up to 48% on the cost of your flight, compared to a flight at midday.

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 Virgin Atlantic, Delta, and United Airlines fly from Idaho to London Heathrow Airport in about 15h 46m. The time it takes to get you to your destination can typically vary by up to 1h 24m. 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 cheapest airlines to fly from Idaho to London Heathrow Airport one-way?

    One-way options have recently been found by users for as low as £299 on United Airlines. Other airlines that offer cheap prices include Air Canada from £300 and Lufthansa from £302 one-way.

  • 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 £465). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £825). 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
Croydon
Slough
Gatwick
Hounslow
Northampton
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Winchester
Chichester
Swindon
Crawley
Romford
Brentford
Ipswich

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
Boston to Heathrow flights
John F Kennedy Intl to London City flights
Los Angeles to Heathrow flights
Newark to Gatwick flights
LaGuardia to Heathrow flights
Dulles Intl to Heathrow flights
LaGuardia to Gatwick flights
San Francisco to Heathrow flights
John F Kennedy Intl to Stansted flights
O'Hare Intl to Heathrow flights
Dallas/Fort Worth to Heathrow flights
Newark to London City flights
Baltimore to Heathrow flights
Seattle to Heathrow flights
Newark to Stansted flights
Boston to Gatwick flights
Newark to Luton flights
Boston to London City flights
Miami to Heathrow flights
Atlanta to Heathrow flights
Orlando to Heathrow flights
Los Angeles to Gatwick flights
Dulles Intl to Gatwick flights
Reagan-National to Heathrow flights
Dulles Intl to London City flights
Los Angeles to London City flights
Boston to Stansted flights
Philadelphia to Heathrow flights
San Francisco to Gatwick flights
Hobby to Heathrow flights
O'Hare Intl to Gatwick flights
Boston to Luton flights
Baltimore to Gatwick flights
George Bush Intcntl to Heathrow flights
Denver to Heathrow flights
Reagan-National to Gatwick flights
O'Hare Intl to London City flights
Dallas/Fort Worth to Gatwick flights
Tampa to Heathrow flights
San Francisco to London City flights
Charlotte to Heathrow flights
Minneapolis to Heathrow flights
Detroit to Heathrow flights
Seattle to Gatwick 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.

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.