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Cheap flights from Idaho to London Heathrow Airport from £240

BOI — LHR
4 Dec — 11 Dec1
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

Mon 30/1106:44 -
1 stop18h 31m
Mon 7/1219:40 -
2 stops25h 12m
Deal found 2/11£703
Tue 1/1207:00 -
1 stop15h 55m
Tue 8/1206:35 -
2 stops21h 55m
Deal found 3/11£704
Wed 2/1212:48 -
2 stops16h 02m
Wed 9/1214:30 -
2 stops33h 20m
Deal found 3/11£709
Mon 30/1108:15 -
2 stops22h 15m
Mon 7/1212:05 -
2 stops54h 03m
Deal found 2/11£710
Wed 2/1212:56 -
1 stop16h 14m
Wed 9/1210:05 -
1 stop19h 41m
Deal found 3/11£725
Tue 1/1216:10 -
1 stop13h 00m
Tue 8/1208:20 -
1 stop21h 26m
Deal found 3/11£726
Tue 1/1213:07 -
2 stops17h 38m
Tue 8/1206:30 -
2 stops16h 34m
Deal found 3/11£729
Thu 3/1206:40 -
1 stop20h 20m
Thu 10/1207:30 -
2 stops22h 16m
Deal found 2/11£740
Tue 3/1112:00 -
2 stops16h 50m
Tue 10/1107:40 -
2 stops20h 52m
Deal found 2/11£741
Tue 17/1114:51 -
1 stop11h 49m
Tue 24/1111:10 -
2 stops18h 49m
Deal found 3/11£742

Find flight deals from Idaho to Heathrow

Round-trip from

£570

One-way from

£240

Popular in

January

Cheapest in

May

Average price

£842
United Airlines
  • United Airlines
  • 2/3-5/3
  • 4 total stops
  • 53h 46m total
  • Idaho to London
Search Deals
Iberia
  • Iberia
  • 7/2-31/12
  • 1 total stop
  • 16h 50m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 27% potential increase in price (£258 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 16% potential price decrease (£93 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 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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Fastest return journey

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

14:00-12:20

1 stop15h 20m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£285

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

06:00-06:20

2 stops17h 20m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£321

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 27/11

13:02-12:20

1 stop16h 18m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£485

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Wed 21/4

06:30-07:25

1 stop17h 55m

London Heathrow

Mon 26/4

07:25-19:16

2 stops18h 51m

£700

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Thu 15/4

16:00-15:05

1 stop16h 05m

London Heathrow

Sat 24/4

17:00-23:56

1 stop13h 56m

£742

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

07:00-08:30

3 stops18h 30m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£745

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sun 22/11

19:10-11:15

1 stop33h 05m

London Heathrow

Tue 8/12

07:40-22:59

1 stop22h 19m

£767

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

16:50-16:30

1 stop16h 40m

London Heathrow

Sun 21/3

10:45-00:04

1 stop19h 19m

£779

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 1/1

11:53-14:25

2 stops19h 32m

London Heathrow

Sun 17/1

06:30-20:48

2 stops21h 18m

£815

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Wed 9/12

08:00-06:40

2 stops15h 40m

London Heathrow

Sat 26/12

11:35-18:07

1 stop13h 32m

£842

Flights are sorted by cheapest return flights first.

Deals found on 31/10

Sorted by cheapest first

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, February is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £649). Flying from Idaho to London Heathrow Airport in January is currently the most expensive (average of £1,500). 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.

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 16h 05m. The time it takes to get you to your destination can typically vary by up to 1h 50m. 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 Boise Air Term. Gowen Fld - London Heathrow. You may also consider Spokane - 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, February is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £649). Flying from Idaho to London Heathrow Airport in January is currently the most expensive (average of £1,500). 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
Luton
Milton Keynes
Wembley
Gatwick
Slough
Ilford
Hayes
Croydon
Eastbourne
Northampton
Barnet
Brentford
Southend-on-Sea
Enfield
Southall
Harrow
Watford
Folkestone
Dagenham

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Idaho to Heathrow

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Atlanta to Heathrow flights
Los Angeles to Gatwick flights
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Hobby to Heathrow flights
Boston to Luton flights
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Denver to Heathrow flights
Reagan-National to Gatwick flights
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Baltimore to Gatwick flights
O'Hare Intl to Gatwick flights
San Francisco to Gatwick flights
Philadelphia to Heathrow flights
O'Hare Intl to Stansted flights
San Francisco to Stansted flights
O'Hare Intl to London City flights
San Francisco to London City flights
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George Bush Intcntl 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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