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Cheap flights from Idaho to London Heathrow Airport from £249

BOI — LHR
12 Nov — 19 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 10/1107:00 -
1 stop20h 00m
Tue 17/1107:30 -
2 stops22h 12m
Deal found 11/10£707
Sun 8/1107:00 -
1 stop18h 15m
Tue 24/1107:30 -
2 stops23h 19m
Deal found 8/10£708
Tue 10/1112:00 -
2 stops16h 50m
Tue 17/1106:35 -
2 stops18h 28m
Deal found 11/10£708
Wed 2/1206:15 -
2 stops19h 55m
Thu 10/1206:35 -
2 stops21h 55m
Deal found 10/10£711
Wed 11/1106:20 -
2 stops22h 30m
Thu 19/1114:30 -
2 stops40h 03m
Deal found 12/10£712
Tue 8/1206:40 -
2 stops22h 25m
Mon 15/219:05 -
2 stops23h 23m
Deal found 9/10£717
Mon 9/1107:00 -
2 stops22h 50m
Mon 16/1119:05 -
2 stops25h 46m
Deal found 12/10£718
Mon 7/1210:37 -
1 stop17h 03m
Wed 16/1206:30 -
2 stops19h 08m
Deal found 9/10£723
Wed 25/1114:51 -
1 stop11h 49m
Wed 2/1211:10 -
2 stops41h 20m
Deal found 11/10£723

Find flight deals from Idaho to Heathrow

Round-trip from

£572

One-way from

£249

Popular in

January

Cheapest in

November

Average price

£934
United Airlines
  • United Airlines
  • 23/2-26/2
  • 4 total stops
  • 55h 07m total
  • Idaho to London
Search Deals
Air Canada
  • Air Canada
  • 16/1-31/12
  • 2 total stops
  • 45h 46m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 30% potential increase in price (£291 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 17% potential price decrease (£99 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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Depart

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Price

Cheapest return flight

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sat 16/1

07:04-11:50

2 stops45h 46m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£249

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sat 16/1

19:00-12:20

1 stop34h 20m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£249
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

£298

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sun 8/11

05:00-07:55

2 stops19h 55m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£350

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Mon 2/11

07:00-12:50

3 stops46h 50m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£372

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

12:42-12:05

2 stops16h 23m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£387

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

10:39-07:10

2 stops37h 31m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£389

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sun 18/10

20:22-10:20

3 stops30h 58m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£413

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Tue 23/2

14:43-07:10

2 stops33h 27m

London Heathrow

Fri 26/2

06:35-21:15

2 stops21h 40m

£572

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Tue 2/3

14:43-09:40

1 stop11h 57m

London Heathrow

Fri 5/3

06:35-19:16

2 stops19h 41m

£661

Flights are sorted by cheapest return flights first.

Deals found on 11/10

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 £483). Flying from Idaho to London Heathrow Airport in January is currently the most expensive (average of £1,528). 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 £645 and £950 in February.
The cheapest return price found within the last 5 days was £572 on United Airlines (23 Feb–26 Feb).

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 16h 07m. 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 £483). Flying from Idaho to London Heathrow Airport in January is currently the most expensive (average of £1,528). 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
Slough
Gatwick
Wembley
Hayes
Ilford
Croydon
Colchester
Northampton
Eastbourne
Brentford
Southend-on-Sea
Barnet
Enfield
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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Orlando to Gatwick flights
Sky Harbor Intl to Heathrow flights
Boston to Luton flights
O'Hare Intl to Gatwick flights
O'Hare Intl to London City flights
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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.

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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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