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Cheap flights from Idaho to London Heathrow Airport from £231

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 28/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LHR
25 Dec — 1 Jan1
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 25 November 2025.

Wed 31/1206:00GEG - LHR
1 stop17h 25mMultiple Airlines
Wed 7/113:25LHR - GEG
2 stops31h 21mMultiple Airlines
Deal found 24/11£564
Wed 31/1205:05GEG - LHR
2 stops21h 20mUnited Airlines
Wed 7/113:25LHR - GEG
2 stops33h 56mUnited Airlines
Deal found 24/11£570
Thu 11/1214:49JAC - LHR
1 stop11h 51mUnited Airlines
Mon 15/1213:00LHR - JAC
2 stops38h 37mUnited Airlines
Deal found 23/11£633
Tue 23/1219:00GEG - LHR
1 stop31h 00mDelta
Thu 8/110:45LHR - GEG
1 stop13h 30mDelta
Deal found 23/11£636
Fri 12/1212:02JAC - LHR
1 stop12h 53mUnited Airlines
Tue 16/1207:25LHR - JAC
2 stops20h 12mUnited Airlines
Deal found 23/11£649
Fri 12/1205:35BOI - LHR
1 stop18h 30mAir France
Sun 21/1217:20LHR - BOI
1 stop35h 05mAir France
Deal found 23/11£650
Thu 4/1206:03BOI - LHR
2 stops30h 27mIcelandair
Mon 8/1220:35LHR - BOI
2 stops32h 10mIcelandair
Deal found 24/11£668
Tue 23/1219:00GEG - LHR
1 stop31h 00mDelta
Tue 6/117:35LHR - GEG
2 stops33h 10mDelta
Deal found 22/11£695
Thu 4/1215:54BOI - LHR
2 stops22h 46mScandinavian Airlines
Mon 8/1207:05LHR - BOI
3 stops22h 00mScandinavian Airlines
Deal found 24/11£699
Tue 23/1216:00GEG - LHR
1 stop33h 40mUnited Airlines
Thu 8/111:35LHR - GEG
1 stop17h 47mUnited Airlines
Deal found 24/11£702
Mon 22/1222:33GEG - LHR
1 stop26h 27mDelta
Thu 8/110:45LHR - GEG
1 stop13h 30mDelta
Deal found 23/11£704
Tue 23/1216:53GEG - LHR
1 stop33h 07mDelta
Wed 7/112:30LHR - GEG
1 stop31h 15mDelta
Deal found 24/11£708

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 25 November 2025.

Round-trip from

£460

One-way from

£231

Popular in

June

Cheapest in

October

Average price

£741
Virgin Atlantic
  • Virgin Atlantic
  • 8/1-15/1
  • 4 total stops
  • 43h 59m total
  • Idaho to London
Search Deals
28/2
  • 28/2
  • 3 total stops
  • 57h 44m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£164 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 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 25 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

14:40-09:40

1 stop12h 00m

London Heathrow

Tue 24/2

09:30-21:32

2 stops19h 02m

£473

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 23/1

14:40-09:40

1 stop12h 00m

London Heathrow

Tue 27/1

06:35-09:56

2 stops34h 21m

£476

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Fri 16/1

08:15-07:55

1 stop16h 40m

London Heathrow

Fri 23/1

06:35-21:52

2 stops22h 17m

£476

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 13/1

10:15-13:30

1 stop20h 15m

London Heathrow

Tue 27/1

06:35-18:07

2 stops18h 32m

£476

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

08:41-12:00

1 stop20h 19m

London Heathrow

Fri 27/2

11:10-23:48

2 stops19h 38m

£476

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 21/1

11:25-07:55

1 stop12h 30m

London Heathrow

Wed 28/1

06:35-21:22

2 stops22h 47m

£476

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sat 17/1

05:45-10:00

1 stop21h 15m

London Heathrow

Sat 24/1

08:40-20:55

2 stops19h 15m

£477

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 13/1

05:45-10:00

1 stop21h 15m

London Heathrow

Wed 21/1

06:30-16:17

2 stops16h 47m

£477

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Fri 16/1

10:39-10:30

1 stop16h 51m

London Heathrow

Wed 21/1

06:30-16:17

2 stops16h 47m

£477

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 13/1

13:40-11:55

1 stop15h 15m

London Heathrow

Thu 22/1

06:30-20:12

2 stops20h 42m

£477

Flights are sorted by cheapest return flights first.

Deals found on 23/11

Showing 1-10 of 51 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 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 £466). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £828). 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 25 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 Lufthansa, United Airlines, and Delta fly from Idaho to London Heathrow Airport in about 12h. The time it takes to get you to your destination can typically vary by up to 4h 05m. 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 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 £301 on Air Canada. Other airlines that offer cheap prices include Lufthansa from £304 and United Airlines from £305 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 Spokane - London Heathrow. You may also consider Boise Air Term. Gowen Fld - London Heathrow or Jackson Hole - 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 £466). Flying from Idaho to London Heathrow Airport in June is currently the most expensive (average of £828). 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
Swindon
Crawley
Brentford
Romford
Chichester
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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Fly with Cheapflights

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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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