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Cheap flights from Idaho to London Heathrow Airport from £272

BOI — LHR
27 Nov — 4 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

Tue 8/1208:00 -
1 stop16h 55m
Tue 15/1206:35 -
2 stops21h 55m
Deal found 24/10£710
Wed 30/1208:05 -
1 stop14h 50m
Fri 15/106:35 -
2 stops22h 00m
Deal found 26/10£711
Tue 8/1206:40 -
1 stop17h 10m
Tue 15/1206:05 -
2 stops23h 41m
Deal found 24/10£712
Tue 8/1208:02 -
1 stop21h 18m
Tue 15/1214:45 -
1 stop16h 14m
Deal found 24/10£713
Wed 30/1206:30 -
1 stop18h 45m
Fri 15/108:20 -
1 stop18h 46m
Deal found 26/10£717
Wed 9/1211:49 -
1 stop17h 11m
Wed 16/1209:00 -
2 stops21h 34m
Deal found 28/10£719
Wed 9/1207:55 -
2 stops19h 55m
Wed 16/1212:15 -
2 stops17h 20m
Deal found 25/10£730

Find flight deals from Idaho to Heathrow

Round-trip from

£570

One-way from

£272

Popular in

January

Cheapest in

April

Average price

£822
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 (£280 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 16% potential price decrease (£97 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

£286
Fastest return journey

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

£296

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

£407

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Tue 1/12

05:15-07:05

1 stop18h 50m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£422

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

£671

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Wed 21/4

14:43-09:40

1 stop11h 57m

London Heathrow

Mon 26/4

07:25-23:41

2 stops23h 16m

£704

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

£711

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

£719

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Thu 4/3

07:00-09:40

1 stop19h 40m

London Heathrow

Mon 29/3

07:25-23:41

2 stops23h 16m

£742

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Thu 4/3

09:53-12:20

1 stop19h 27m

London Heathrow

Mon 29/3

17:00-09:25

1 stop23h 25m

£753

Flights are sorted by cheapest return flights first.

Deals found on 27/10

Showing 1-10 of 13 resultsSorted by cheapest first
1
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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, October is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £643). Flying from Idaho to London Heathrow Airport in January is currently the most expensive (average of £1,519). 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 Alaska Airlines and United Airlines fly from Idaho to London Heathrow Airport in about 11h 57m. The time it takes to get you to your destination can typically vary by up to 5h 23m. 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 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, October is the cheapest month in which you can book a flight from Idaho to London Heathrow Airport (average of £643). Flying from Idaho to London Heathrow Airport in January is currently the most expensive (average of £1,519). 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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Atlanta to Heathrow flights
Dulles Intl to Gatwick flights
Boston to Gatwick flights
Dulles Intl to London City flights
Reagan-National to Heathrow flights
Boston to London City flights
Miami to Heathrow flights
Boston to Stansted flights
Orlando to Heathrow flights
Hobby to Heathrow flights
Dulles Intl to Luton flights
Denver to Heathrow flights
Baltimore to Gatwick flights
Los Angeles to Gatwick flights
Boston to Luton flights
Reagan-National to Gatwick flights
O'Hare Intl to Gatwick flights
San Francisco to Gatwick flights
O'Hare Intl to London City flights
Los Angeles to London City flights
George Bush Intcntl to Heathrow flights
O'Hare Intl to Stansted flights
Baltimore to Luton flights
Los Angeles to Stansted flights
San Francisco to London City flights
San Francisco to Stansted flights
LaGuardia to Stansted flights
Seattle to Gatwick flights
Philadelphia 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.

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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