How long does it take to fly to London?

Flight times from Idaho to London vary, but if you’re flying out of Boise and flying into London Heathrow Airport (one of the most popular routes), then the duration is 11h 57m on average. Another popular route from Idaho to London is flying from Idaho Falls to London Heathrow Airport, which will take roughly 13h 45m. Keep in mind that layovers or delays could extend your travel time.

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

United Airlines, Lufthansa, and Air Canada are the most popular carriers operating from Idaho to London

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

Prices for flights from Idaho to London are updated daily.

How many operators does momondo search for flights from Idaho to London?

As of November 2025, there is 1 operator available to choose from for flights from Idaho to London.

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

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.

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

The travel and health documents required for your trip to London 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. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£241 Cheap Flights from Idaho to London in 2025/26

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Find the cheapest flights from Idaho to London

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13:46 - 10:30BOI-LHR

13h 44m1 stop

11:20 - 22:49LHR-BOI

18h 29m1 stop

£431Virgin Atlantic

Find Deal

Tue, 17 Feb - Thu, 26 Feb

05:20 - 07:05BOI-LHR

18h 45m1 stop

12:20 - 18:28LHR-BOI

13h 08m1 stop

£432Virgin Atlantic

Find Deal

Tue, 17 Feb - Thu, 26 Feb

07:00 - 10:00JAC-LHR

20h 00m1 stop

20:25 - 17:05LHR-JAC

27h 40m2 stops

£451KLM

Find Deal

Wed, 3 Dec - Mon, 8 Dec

07:00 - 07:05JAC-LHR

17h 05m2 stops

20:25 - 17:05LHR-JAC

27h 40m2 stops

£454KLM

Find Deal

Wed, 3 Dec - Mon, 8 Dec

13:00 - 10:00BOI-LHR

14h 00m1 stop

06:20 - 18:28LHR-BOI

19h 08m2 stops

£455Delta

Find Deal

Tue, 17 Feb - Fri, 27 Feb

11:22 - 10:30GEG-LHR

15h 08m1 stop

06:20 - 18:47LHR-GEG

20h 27m2 stops

£455Delta

Find Deal

Wed, 21 Jan - Wed, 4 Feb

11:19 - 10:00BOI-LHR

15h 41m1 stop

06:20 - 23:59LHR-BOI

24h 39m2 stops

£456Delta

Find Deal

Tue, 17 Feb - Fri, 27 Feb

14:04 - 11:40BOI-LHR

14h 36m1 stop

11:20 - 21:25LHR-BOI

17h 05m1 stop

£474Air France

Find Deal

Fri, 5 Dec - Wed, 24 Dec

08:15 - 05:55BOI-LHR

14h 40m1 stop

13:25 - 22:45LHR-BOI

40h 20m2 stops

£476Multiple Airlines

Find Deal

Sat, 6 Dec - Sat, 13 Dec

08:15 - 10:25BOI-LHR

19h 10m2 stops

13:25 - 22:45LHR-BOI

40h 20m2 stops

£479Multiple Airlines

Find Deal

Sat, 6 Dec - Sat, 13 Dec

Virgin Atlantic flights from Idaho to London

Our best Virgin Atlantic deals on Idaho to London flight tickets

Virgin Atlantic

17 Feb

BOI13:46Boise Air Term. Gowen Fld

13h 44m

1 stop

LHR10:30London Heathrow

26 Feb

LHR11:20London Heathrow

18h 29m

1 stop

BOI22:49Boise Air Term. Gowen Fld

£431

Find similar

Virgin Atlantic

17 Feb

BOI05:20Boise Air Term. Gowen Fld

18h 45m

1 stop

LHR07:05London Heathrow

26 Feb

LHR12:20London Heathrow

13h 08m

1 stop

BOI18:28Boise Air Term. Gowen Fld

£432

Find similar

Virgin Atlantic

4 Feb

GEG06:30Spokane

16h 35m

1 stop

LHR07:05London Heathrow

9 Feb

LHR06:30London Heathrow

22h 50m

2 stops

GEG21:20Spokane

£460

Find similar

KLM flights from Idaho to London

Our best KLM deals on Idaho to London flight tickets

KLM

3 Dec

JAC07:00Jackson Hole

20h 00m

1 stop

LHR10:00London Heathrow

8 Dec

LHR20:25London Heathrow

27h 40m

2 stops

JAC17:05Jackson Hole

£451

Find similar

KLM

3 Dec

JAC07:00Jackson Hole

17h 05m

2 stops

LHR07:05London Heathrow

8 Dec

LHR20:25London Heathrow

27h 40m

2 stops

JAC17:05Jackson Hole

£454

Find similar

KLM

12 Nov

GEG06:00Spokane

20h 00m

1 stop

LHR10:00London Heathrow

3 Dec

LHR11:05London Heathrow

17h 05m

1 stop

GEG20:10Spokane

£455

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

13:46-10:30

1 stop13h 44m

London Heathrow

Thu 26/2

11:20-22:49

1 stop18h 29m

£431

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

05:20-07:05

1 stop18h 45m

London Heathrow

Thu 26/2

12:20-18:28

1 stop13h 08m

£432

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 3/12

07:00-10:00

1 stop20h 00m

London Heathrow

Mon 8/12

20:25-17:05

2 stops27h 40m

£451

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 3/12

07:00-07:05

2 stops17h 05m

London Heathrow

Mon 8/12

20:25-17:05

2 stops27h 40m

£454

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

13:00-10:00

1 stop14h 00m

London Heathrow

Fri 27/2

06:20-18:28

2 stops19h 08m

£455

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 21/1

11:22-10:30

1 stop15h 08m

London Heathrow

Wed 4/2

06:20-18:47

2 stops20h 27m

£455

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

11:19-10:00

1 stop15h 41m

London Heathrow

Fri 27/2

06:20-23:59

2 stops24h 39m

£456

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Fri 5/12

14:04-11:40

1 stop14h 36m

London Heathrow

Wed 24/12

11:20-21:25

1 stop17h 05m

£474

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sat 6/12

08:15-05:55

1 stop14h 40m

London Heathrow

Sat 13/12

13:25-22:45

2 stops40h 20m

£476

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sat 6/12

08:15-10:25

2 stops19h 10m

London Heathrow

Sat 13/12

13:25-22:45

2 stops40h 20m

£479

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

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?

The cheapest month to fly to London from Idaho is in October. Flight prices, which tend to average around £506, are often lower during this time because this is during the off-season. The month of April is another great option to travel to London, with average flight prices from Idaho averaging around £597.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is at midday when flights can be purchased for as low as £544. Flights in the afternoon are often more expensive, with an average ticket price of £621.

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from Idaho when booking week ahead of your departure date. In general, you can expect to find flights to London for around £717 when searching week before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Idaho for as low as £477 on momondo.

Cheap Idaho to London flight deals and tips

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

Direct flights	None

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

Search flight deals

When did momondo last update prices for flights from Idaho to London?
Prices for flights from Idaho to London are updated daily.
How many operators does momondo search for flights from Idaho to London?
As of November 2025, there is 1 operator available to choose from for flights from Idaho to London.
How old do you have to be to fly from Idaho to London?
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.
What documentation or ID do you need to fly to London?
The travel and health documents required for your trip to London 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. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Eastbourne

Milton Keynes

Luton

Gatwick

Maidstone

Slough

Canterbury

Southend-on-Sea

Ipswich

Ilford

Guildford

Dover

Colchester

Chelmsford

Hayes

Worthing

Ramsgate

Dartford

Bedford

Winchester

Why use momondo?

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

It is quick and easy to find Idaho to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

Yes. momondo enables you to select and highlight flights to London from Idaho with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Idaho to London.

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

Yes momondo offers price alerts on flights to London from Idaho. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.