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Cheap flights from Idaho to London Heathrow Airport from £248

BOI — LHR
31 Oct — 7 Nov1
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

Tue 29/1214:43 -
1 stop11h 57m
Mon 11/111:10 -
2 stops41h 10m
Deal found 28/9£661
Tue 10/1107:00 -
1 stop20h 00m
Tue 17/1107:30 -
2 stops22h 12m
Deal found 29/9£679
Wed 28/1012:31 -
1 stop13h 24m
Wed 4/1106:35 -
2 stops21h 40m
Deal found 29/9£681
Wed 11/1105:00 -
2 stops19h 10m
Wed 18/1106:35 -
2 stops21h 40m
Deal found 26/9£683
Tue 1/1206:15 -
2 stops18h 40m
Wed 9/1206:35 -
2 stops21h 55m
Deal found 27/9£684
Wed 4/1112:00 -
2 stops16h 50m
Wed 11/1114:30 -
2 stops38h 02m
Deal found 30/9£685
Wed 4/1112:31 -
1 stop12h 24m
Wed 11/1113:00 -
2 stops29h 31m
Deal found 30/9£688
Wed 28/1011:32 -
2 stops18h 08m
Wed 4/1108:40 -
2 stops20h 45m
Deal found 29/9£699
Tue 29/1216:56 -
1 stop12h 24m
Mon 11/114:45 -
1 stop16h 01m
Deal found 28/9£700
Tue 10/1113:24 -
1 stop14h 01m
Tue 17/1111:45 -
1 stop16h 48m
Deal found 29/9£702
Wed 28/1013:32 -
1 stop15h 48m
Wed 4/1113:50 -
1 stop15h 52m
Deal found 29/9£703

Find flight deals from Idaho to Heathrow

Round-trip from

£571

One-way from

£248

Popular in

January

Cheapest in

November

Average price

£824
United Airlines
  • United Airlines
  • 2/3-5/3
  • 4 total stops
  • 53h 08m total
  • Idaho to London
Search Deals
United Airlines
  • United Airlines
  • 2/2-31/12
  • 1 total stop
  • 16h 40m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 31% potential increase in price (£306 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 18% potential price decrease (£100 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Idaho to London Heathrow Airport that are best for you.

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Cheapest return flight

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

14:00-12:20

1 stop15h 20m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£286
Fastest return journey

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

14:00-12:10

1 stop15h 10m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£297

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Thu 5/11

14:49-19:30

3 stops45h 41m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£335

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Thu 12/11

20:59-12:50

2 stops32h 51m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£347

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

10:39-06:30

2 stops36h 51m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£382

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Wed 23/12

18:56-10:50

3 stops32h 54m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£427

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Tue 2/3

17:22-08:30

2 stops32h 08m

London Heathrow

Fri 5/3

06:35-19:16

2 stops19h 41m

£575

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Tue 2/3

12:00-12:20

1 stop17h 20m

London Heathrow

Fri 5/3

14:45-00:11

1 stop16h 26m

£663

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Wed 11/11

10:37-10:40

1 stop17h 03m

London Heathrow

Wed 18/11

12:20-22:26

1 stop17h 06m

£702

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Wed 4/11

13:06-10:00

1 stop13h 54m

London Heathrow

Tue 10/11

06:30-17:17

2 stops17h 47m

£708

Flights are sorted by cheapest return flights first.

Deals found on 29/9

Showing 1-10 of 15 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

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, November is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £482). Flying from Idaho to London Heathrow Airport in January is currently the most expensive (average of £1,524). 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?

Airfare is below average for this route at the moment.
Idaho to London Heathrow Airport flights typically cost between £643 and £948 in March.
The cheapest return price found within the last 5 days was £571 on United Airlines (2 Mar–5 Mar).

Related info for your journey

  • How long is the flight from Idaho to London Heathrow Airport?

    Airlines like United Airlines and Alaska Airlines fly from Idaho to London Heathrow Airport in about 17h 20m. The time it takes to get you to your destination can typically vary by up to 14h 48m. 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 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, November is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £482). Flying from Idaho to London Heathrow Airport in January is currently the most expensive (average of £1,524). 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
Luton
Gatwick
Wembley
Slough
Ilford
Hayes
Croydon
Northampton
Colchester
Eastbourne
Enfield
Brentford
Southend-on-Sea
Barnet
Southall
Watford
Stratford-upon-Avon
Kingston upon Thames

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Idaho to Heathrow

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Dulles Intl to Gatwick flights
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Newark to Luton flights
Dulles Intl to London City flights
Boston to Gatwick flights
Seattle to Heathrow flights
Boston to London City flights
Boston to Stansted flights
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Baltimore to Gatwick flights
Miami to Heathrow flights
Philadelphia to Heathrow flights
San Francisco to Gatwick flights
Los Angeles to Gatwick flights
Dulles Intl to Luton flights
Hobby to Heathrow flights
Reagan-National to Gatwick flights
Denver to Heathrow flights
Los Angeles to Stansted flights
Los Angeles to London City flights
Boston to Luton flights
San Francisco to London City flights
O'Hare Intl to Gatwick flights
San Francisco to Stansted flights
O'Hare Intl to London City flights
O'Hare Intl to Stansted flights
George Bush Intcntl to Heathrow flights
Orlando to Gatwick flights
Baltimore to Luton flights
Charlotte to Heathrow flights

Fly with Cheapflights

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.

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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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