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 11h 59m and 12h 42m, respectively.

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

United Airlines, Delta, and KLM 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.

£245 Cheap Flights from Idaho to London Heathrow Airport in 2026

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Find the cheapest flights from Idaho to London

Round-trip

One-way

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Cheap return flights

Enter your travel dates to find the best prices.

06:20 - 11:15

BOI

LHR

21h 55m

1 stop

06:50 - 23:06

LHR

BOI

23h 16m

2 stops

£555United Airlines

Tue, 10 Nov - Thu, 12 Nov

11:30 - 12:00

GEG

LHR

16h 30m

1 stop

06:35 - 21:09

LHR

GEG

22h 34m

2 stops

£556United Airlines

Tue, 10 Nov - Thu, 12 Nov

11:30 - 12:00

GEG

LHR

16h 30m

1 stop

06:35 - 21:09

LHR

GEG

22h 34m

2 stops

£557United Airlines

Tue, 10 Nov - Thu, 12 Nov

11:45 - 12:00

BOI

LHR

17h 15m

2 stops

09:30 - 21:15

LHR

BOI

18h 45m

2 stops

£567United Airlines

Tue, 10 Nov - Thu, 12 Nov

12:50 - 07:25

GEG

LHR

34h 35m

1 stop

07:25 - 10:30

LHR

GEG

35h 05m

2 stops

£602Lufthansa

Tue, 13 Oct - Fri, 16 Oct

06:25 - 15:35

LWS

LHR

25h 10m

1 stop

09:55 - 22:50

LHR

LWS

20h 55m

2 stops

£651Delta

Sun, 13 Sep - Fri, 25 Sep

14:02 - 13:15

BOI

LHR

16h 13m

1 stop

06:30 - 17:52

LHR

BOI

18h 22m

2 stops

£651Virgin Atlantic

Tue, 18 Aug - Thu, 27 Aug

15:25 - 13:05

BOI

LHR

14h 40m

1 stop

06:30 - 18:33

LHR

BOI

19h 03m

2 stops

£652Delta

Tue, 29 Sep - Wed, 7 Oct

05:00 - 06:30

BOI

LHR

18h 30m

2 stops

07:25 - 21:31

LHR

BOI

21h 06m

2 stops

£654Multiple Airlines

Tue, 13 Oct - Tue, 20 Oct

13:42 - 12:50

JAC

LHR

16h 08m

2 stops

08:00 - 17:53

LHR

JAC

16h 53m

2 stops

£869Multiple Airlines

Tue, 7 Jul - Wed, 15 Jul

Air Canada flights from Idaho to London Heathrow Airport

Our best Air Canada deals on Idaho to London Heathrow Airport flight tickets

Air Canada

15 Sept

GEG13:37Spokane

35h 58m

2 stops

LHR09:35London Heathrow

25 Sept

LHR15:05London Heathrow

39h 11m

2 stops

GEG22:16Spokane

£662

Air Canada

11 Aug

GEG13:37Spokane

36h 23m

2 stops

LHR10:00London Heathrow

28 Aug

LHR15:05London Heathrow

35h 46m

2 stops

GEG18:51Spokane

£662

Air Canada

18 Sept

GEG13:37Spokane

58h 58m

2 stops

LHR08:35London Heathrow

25 Sept

LHR15:05London Heathrow

39h 11m

2 stops

GEG22:16Spokane

£665

United Airlines flights from Idaho to London Heathrow Airport

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

United Airlines

10 Nov

BOI06:20Boise Air Term. Gowen Fld

21h 55m

1 stop

LHR11:15London Heathrow

12 Nov

LHR06:50London Heathrow

23h 16m

2 stops

BOI23:06Boise Air Term. Gowen Fld

£555

United Airlines

10 Nov

GEG11:30Spokane

16h 30m

1 stop

LHR12:00London Heathrow

12 Nov

LHR06:35London Heathrow

22h 34m

2 stops

GEG21:09Spokane

£556

United Airlines

10 Nov

GEG11:30Spokane

16h 30m

1 stop

LHR12:00London Heathrow

12 Nov

LHR06:35London Heathrow

22h 34m

2 stops

GEG21:09Spokane

£557

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

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 10/11

06:20-11:15

1 stop21h 55m

London Heathrow

Thu 12/11

06:50-23:06

2 stops23h 16m

£555

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 10/11

11:30-12:00

1 stop16h 30m

London Heathrow

Thu 12/11

06:35-21:09

2 stops22h 34m

£556

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 10/11

11:30-12:00

1 stop16h 30m

London Heathrow

Thu 12/11

06:35-21:09

2 stops22h 34m

£557

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 10/11

11:45-12:00

2 stops17h 15m

London Heathrow

Thu 12/11

09:30-21:15

2 stops18h 45m

£567

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 13/10

12:50-07:25

1 stop34h 35m

London Heathrow

Fri 16/10

07:25-10:30

2 stops35h 05m

£602

LewistonLondon

LWS - LHR

LWSLHR

Lewiston Nez Perce Rgnl

Sun 13/9

06:25-15:35

1 stop25h 10m

London Heathrow

Fri 25/9

09:55-22:50

2 stops20h 55m

£651

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 18/8

14:02-13:15

1 stop16h 13m

London Heathrow

Thu 27/8

06:30-17:52

2 stops18h 22m

£651

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 29/9

15:25-13:05

1 stop14h 40m

London Heathrow

Wed 7/10

06:30-18:33

2 stops19h 03m

£652

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 13/10

05:00-06:30

2 stops18h 30m

London Heathrow

Tue 20/10

07:25-21:31

2 stops21h 06m

£654

Fastest return journey

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Tue 7/7

13:42-12:50

2 stops16h 08m

London Heathrow

Wed 15/7

08:00-17:53

2 stops16h 53m

£869

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, July 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 £428. The month of December is another great option to travel to London Heathrow Airport, with average flight prices from Idaho averaging around £442.

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	11h 56m
Direct flights	None

The fastest flight from Idaho to London Heathrow Airport takes 11h 56m

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

Frequently asked questions about flying from Idaho to London Heathrow Airport

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

Wembley

Slough

Maidstone

Northampton

Swindon

Ipswich

Southend-on-Sea

Canterbury

Ilford

Hayes

Guildford

Poole

Folkestone

Chelmsford

Dover

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.