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Cheap flights from Idaho to London Heathrow Airport from £270

BOI — LHR
29 Nov — 6 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

Sun 29/1106:44 -
1 stop18h 31m
Tue 15/1207:30 -
2 stops22h 16m
Deal found 29/10£706
Wed 30/1206:20 -
2 stops18h 35m
Fri 15/106:35 -
2 stops22h 00m
Deal found 26/10£710
Wed 30/1206:30 -
1 stop18h 45m
Fri 15/108:20 -
1 stop18h 46m
Deal found 26/10£712
Wed 9/1211:49 -
1 stop17h 11m
Wed 16/1209:00 -
2 stops21h 34m
Deal found 28/10£714
Thu 26/1113:02 -
1 stop16h 18m
Thu 3/1214:45 -
1 stop34h 38m
Deal found 29/10£730
Tue 17/1107:00 -
1 stop20h 00m
Tue 24/1106:05 -
2 stops24h 44m
Deal found 30/10£744
Tue 17/1110:34 -
2 stops14h 21m
Tue 24/1106:35 -
2 stops21h 40m
Deal found 30/10£748
Thu 26/1114:26 -
1 stop14h 14m
Thu 3/1206:30 -
2 stops16h 34m
Deal found 29/10£752

Find flight deals from Idaho to Heathrow

Round-trip from

£566

One-way from

£270

Popular in

January

Cheapest in

April

Average price

£816
United Airlines
  • United Airlines
  • 2/3-5/3
  • 4 total stops
  • 54h 31m total
  • Idaho to London
Search Deals
26/11-31/12
  • 26/11-31/12
  • 3 total stops
  • 40h 10m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 29% potential increase in price (£276 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 16% potential price decrease (£96 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

Thu 26/11

07:00-12:50

2 stops46h 50m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£284
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

£287

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

Wed 31/12

00:00-16:00

Nonstop0h 00m

£294

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sun 8/11

14:49-19:30

3 stops45h 41m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£354

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Fri 12/3

14:00-15:30

3 stops42h 30m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£404

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Mon 19/4

11:45-11:10

1 stop16h 25m

London Heathrow

Wed 28/4

07:25-19:16

2 stops18h 51m

£664

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sat 6/3

20:52-07:25

1 stop27h 33m

London Heathrow

Sun 14/3

12:05-23:59

2 stops41h 54m

£702

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sun 18/4

10:39-09:40

1 stop16h 01m

London Heathrow

Sat 24/4

10:50-23:41

2 stops19h 51m

£702

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Wed 7/4

08:40-06:55

2 stops15h 15m

London Heathrow

Sat 17/4

07:25-19:16

2 stops18h 51m

£706

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Wed 9/12

11:49-12:00

1 stop17h 11m

London Heathrow

Wed 16/12

09:00-23:34

2 stops21h 34m

£714

Flights are sorted by cheapest return flights first.

Deals found on 27/10

Showing 1-10 of 17 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, February is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £652). Flying from Idaho to London Heathrow Airport in January is currently the most expensive (average of £1,508). 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 fly from Idaho to London Heathrow Airport in about 16h 25m. The time it takes to get you to your destination can typically vary by up to . There are 4829 mi between Idaho and London Heathrow Airport.

  • 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 Jackson Hole - London Heathrow or Spokane - 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 £652). Flying from Idaho to London Heathrow Airport in January is currently the most expensive (average of £1,508). 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
Slough
Wembley
Gatwick
Ilford
Hayes
Croydon
Northampton
Barnet
Eastbourne
Brentford
Southend-on-Sea
Southall
Enfield
Watford
Kingston upon Thames
Dagenham
Dover

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Idaho to Heathrow

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Dulles Intl to Luton flights
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George Bush Intcntl to Heathrow flights
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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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