How long does it take to fly to London Heathrow Airport?

If you’re flying from a popular airport in Idaho, such as Idaho Falls or Boise, and flying into London Heathrow Airport, then you can expect flight times to average 12h 05m and 12h 07m, respectively.

What is the cheapest airline that flies from Idaho to London Heathrow?

American Airlines, Iberia, and Delta are the most popular carriers operating from Idaho to London Heathrow

When did momondo last update prices for flights from Idaho to London Heathrow Airport?

Prices for flights from Idaho to London Heathrow Airport are updated daily.

How old do you have to be to fly from Idaho to London Heathrow Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£252 Cheap Flights from Idaho to London Heathrow Airport in 2026

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Find the cheapest flights from Idaho to London

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12:45 - 12:50

GEG

LHR

16h 05m

1 stop

06:15 - 20:47

LHR

GEG

22h 32m

2 stops

£654Iberia

Wed, 9 Sep - Wed, 7 Oct

06:00 - 06:20

GEG

LHR

16h 20m

1 stop

06:15 - 20:47

LHR

GEG

22h 32m

2 stops

£657Iberia

Wed, 12 Aug - Tue, 15 Sep

15:30 - 17:35

BOI

LHR

19h 05m

1 stop

06:30 - 15:38

LHR

BOI

16h 08m

2 stops

£661Delta

Wed, 9 Sep - Wed, 16 Sep

08:45 - 10:20

BOI

LHR

18h 35m

2 stops

06:30 - 15:38

LHR

BOI

16h 08m

2 stops

£664Delta

Wed, 9 Sep - Wed, 16 Sep

12:25 - 22:40

GEG

LHR

26h 15m

2 stops

09:30 - 21:16

LHR

GEG

19h 46m

2 stops

£677Lufthansa

Tue, 5 May - Tue, 19 May

12:25 - 20:45

GEG

LHR

24h 20m

2 stops

08:30 - 21:16

LHR

GEG

20h 46m

2 stops

£678Lufthansa

Tue, 5 May - Tue, 19 May

12:45 - 12:50

GEG

LHR

16h 05m

1 stop

08:55 - 20:47

LHR

GEG

19h 52m

1 stop

£680American Airlines

Wed, 9 Sep - Wed, 7 Oct

06:00 - 06:20

GEG

LHR

16h 20m

1 stop

08:55 - 20:47

LHR

GEG

19h 52m

1 stop

£682American Airlines

Wed, 12 Aug - Tue, 15 Sep

06:44 - 12:50

BOI

LHR

23h 06m

1 stop

11:00 - 22:17

LHR

BOI

18h 17m

1 stop

£682Finnair

Sun, 13 Sep - Tue, 22 Sep

13:18 - 10:50

BOI

LHR

14h 32m

1 stop

08:55 - 22:17

LHR

BOI

20h 22m

1 stop

£682Finnair

Wed, 9 Sep - Wed, 16 Sep

Scandinavian Airlines flights from Idaho to London Heathrow Airport

Our best Scandinavian Airlines deals on Idaho to London Heathrow Airport flight tickets

Scandinavian Airlines

15 Sept

GEG10:50Spokane

23h 40m

2 stops

LHR18:30London Heathrow

26 Sept

LHR06:40London Heathrow

20h 07m

2 stops

GEG18:47Spokane

£710

Scandinavian Airlines

15 Sept

GEG10:50Spokane

21h 35m

3 stops

LHR16:25London Heathrow

26 Sept

LHR06:40London Heathrow

18h 28m

3 stops

GEG17:08Spokane

£725

Scandinavian Airlines

16 Aug

BOI10:23Boise Air Term. Gowen Fld

23h 02m

3 stops

LHR16:25London Heathrow

26 Aug

LHR06:40London Heathrow

23h 24m

2 stops

BOI23:04Boise Air Term. Gowen Fld

£756

Virgin Atlantic flights from Idaho to London Heathrow Airport

Our best Virgin Atlantic deals on Idaho to London Heathrow Airport flight tickets

Virgin Atlantic

1 Sept

GEG14:45Spokane

16h 15m

1 stop

LHR15:00London Heathrow

11 Sept

LHR11:30London Heathrow

20h 14m

2 stops

GEG23:44Spokane

£711

Virgin Atlantic

11 May

JAC13:15Jackson Hole

23h 55m

2 stops

LHR20:10London Heathrow

18 May

LHR11:45London Heathrow

39h 30m

2 stops

JAC20:15Jackson Hole

£732

Virgin Atlantic

31 Mar

GEG06:25Spokane

19h 50m

1 stop

LHR10:15London Heathrow

2 Apr

LHR12:25London Heathrow

19h 38m

2 stops

GEG00:03Spokane

£1,162

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 9/9

12:45-12:50

1 stop16h 05m

London Heathrow

Wed 7/10

06:15-20:47

2 stops22h 32m

£654

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/8

06:00-06:20

1 stop16h 20m

London Heathrow

Tue 15/9

06:15-20:47

2 stops22h 32m

£657

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 9/9

15:30-17:35

1 stop19h 05m

London Heathrow

Wed 16/9

06:30-15:38

2 stops16h 08m

£660

Fastest return journey

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 9/9

08:45-10:20

2 stops18h 35m

London Heathrow

Wed 16/9

06:30-15:38

2 stops16h 08m

£664

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 5/5

12:25-22:40

2 stops26h 15m

London Heathrow

Tue 19/5

09:30-21:16

2 stops19h 46m

£677

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 5/5

12:25-20:45

2 stops24h 20m

London Heathrow

Tue 19/5

08:30-21:16

2 stops20h 46m

£678

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 9/9

12:45-12:50

1 stop16h 05m

London Heathrow

Wed 7/10

08:55-20:47

1 stop19h 52m

£680

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/8

06:00-06:20

1 stop16h 20m

London Heathrow

Tue 15/9

08:55-20:47

1 stop19h 52m

£682

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 13/9

06:44-12:50

1 stop23h 06m

London Heathrow

Tue 22/9

11:00-22:17

1 stop18h 17m

£682

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 9/9

13:18-10:50

1 stop14h 32m

London Heathrow

Wed 16/9

08:55-22:17

1 stop20h 22m

£682

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Idaho to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to London Heathrow Airport?

In general, August is the cheapest month to fly from Idaho to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £601. The month of April is another great option to travel to London Heathrow Airport, with average flight prices from Idaho averaging around £606.

Cheap Idaho to London Heathrow Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho to London Heathrow Airport

Fastest flight time	12h 05m
Direct flights	None

The fastest flight from Idaho to London Heathrow Airport takes 12h 05m

There are no direct flights from Idaho to London Heathrow Airport. There are no popular flight routes from Idaho to London Heathrow Airport.

Search flight deals

When did momondo last update prices for flights from Idaho to London Heathrow Airport?
Prices for flights from Idaho to London Heathrow Airport are updated daily.
How old do you have to be to fly from Idaho to London Heathrow Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Eastbourne

Milton Keynes

Luton

Gatwick

Stratford-upon-Avon

Slough

Maidstone

Northampton

Swindon

Southend-on-Sea

Wembley

Ipswich

Canterbury

Ilford

Guildford

Hayes

Chelmsford

Poole

Dover

Folkestone

Why use momondo?

Why should I use momondo to find a flight deal from Idaho to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Idaho to London for you.

Can I find flights from Idaho to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from Idaho which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Idaho to London?

Once all potential Idaho to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Idaho to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Idaho to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.