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

Lufthansa, KLM, and Delta are the most popular carriers operating from London to Idaho

Which airlines fly to Idaho?

United Airlines, Virgin Atlantic and Lufthansa are the top three most popular airlines that fly to Idaho from London according to our data. United Airlines is the first choice among our users, with 49% of people opting to fly with this airline when travelling to Idaho. Keep in mind that there are 3 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from London to Idaho are refreshed on a daily basis.

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

As of February 2026, there are 4 operators available to choose from for flights from London to Idaho.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Idaho.

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

The required travel and health documents for your Idaho trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£310 Cheap Flights from London to Idaho in 2026

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Find the cheapest flights from London to Idaho

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:30 - 20:25

LHR

BOI

19h 55m

2 stops

11:58 - 10:30

BOI

LHR

16h 32m

1 stop

£541Multiple Airlines

Tue, 17 Mar - Tue, 24 Mar

09:00 - 21:11

LHR

BOI

19h 11m

2 stops

10:21 - 10:25

BOI

LHR

18h 04m

2 stops

£553United Airlines

Tue, 3 Mar - Tue, 10 Mar

06:35 - 21:18

LHR

GEG

21h 43m

2 stops

07:02 - 07:25

GEG

LHR

17h 23m

1 stop

£556United Airlines

Tue, 10 Mar - Tue, 17 Mar

10:25 - 18:47

LHR

BOI

15h 22m

1 stop

07:47 - 07:55

BOI

LHR

18h 08m

1 stop

£573Lufthansa

Tue, 3 Mar - Tue, 10 Mar

18:00 - 11:49

LHR

BOI

24h 49m

2 stops

19:03 - 06:45

BOI

LHR

28h 42m

2 stops

£586Lufthansa

Mon, 20 Apr - Mon, 27 Apr

11:55 - 21:37

LGW

GEG

16h 42m

2 stops

12:00 - 10:55

GEG

LGW

15h 55m

2 stops

£589Icelandair

Tue, 10 Mar - Tue, 17 Mar

11:55 - 22:57

LGW

BOI

17h 02m

2 stops

11:58 - 10:55

BOI

LGW

16h 57m

2 stops

£687Icelandair

Wed, 18 Mar - Wed, 25 Mar

08:55 - 22:16

LHR

IDA

19h 21m

2 stops

13:10 - 10:30

IDA

LHR

15h 20m

2 stops

£706Virgin Atlantic

Wed, 18 Mar - Wed, 25 Mar

20:25 - 18:15

LHR

IDA

27h 50m

2 stops

18:55 - 10:00

IDA

LHR

32h 05m

1 stop

£723KLM

Mon, 16 Mar - Sun, 29 Mar

17:50 - 18:15

LHR

IDA

30h 25m

2 stops

13:10 - 10:00

IDA

LHR

14h 50m

1 stop

£735KLM

Tue, 17 Mar - Tue, 24 Mar

Lufthansa flights from London to Idaho

Our best Lufthansa deals on London to Idaho flight tickets

Lufthansa

3 Mar

LHR10:25London Heathrow

15h 22m

1 stop

BOI18:47Boise Air Term. Gowen Fld

10 Mar

BOI07:47Boise Air Term. Gowen Fld

18h 08m

1 stop

LHR07:55London Heathrow

£573

Lufthansa

20 Apr

LHR18:00London Heathrow

24h 49m

2 stops

BOI11:49Boise Air Term. Gowen Fld

27 Apr

BOI19:03Boise Air Term. Gowen Fld

28h 42m

2 stops

LHR06:45London Heathrow

£586

Lufthansa

3 Mar

LHR07:40London Heathrow

21h 27m

2 stops

GEG21:07Spokane

27 May

GEG13:41Spokane

21h 59m

2 stops

LHR19:40London Heathrow

£611

United Airlines flights from London to Idaho

Our best United Airlines deals on London to Idaho flight tickets

United Airlines

3 Mar

LHR09:00London Heathrow

19h 11m

2 stops

BOI21:11Boise Air Term. Gowen Fld

10 Mar

BOI10:21Boise Air Term. Gowen Fld

18h 04m

2 stops

LHR10:25London Heathrow

£553

United Airlines

10 Mar

LHR06:35London Heathrow

21h 43m

2 stops

GEG21:18Spokane

17 Mar

GEG07:02Spokane

17h 23m

1 stop

LHR07:25London Heathrow

£556

United Airlines

18 Mar

LHR08:30London Heathrow

20h 26m

2 stops

BOI22:56Boise Air Term. Gowen Fld

25 Mar

BOI10:49Boise Air Term. Gowen Fld

19h 11m

1 stop

LHR12:00London Heathrow

£557

Fly from

Fly to

Route

Depart

Return

Price

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 17/3

06:30-20:25

2 stops19h 55m

Boise Air Term. Gowen Fld

Tue 24/3

11:58-10:30

1 stop16h 32m

£541

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 3/3

09:00-21:11

2 stops19h 11m

Boise Air Term. Gowen Fld

Tue 10/3

10:21-10:25

2 stops18h 04m

£553

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:18

2 stops21h 43m

Spokane

Tue 17/3

07:02-07:25

1 stop17h 23m

£556

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 3/3

10:25-18:47

1 stop15h 22m

Boise Air Term. Gowen Fld

Tue 10/3

07:47-07:55

1 stop18h 08m

£573

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 20/4

18:00-11:49

2 stops24h 49m

Boise Air Term. Gowen Fld

Mon 27/4

19:03-06:45

2 stops28h 42m

£586

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Tue 10/3

11:55-21:37

2 stops16h 42m

Spokane

Tue 17/3

12:00-10:55

2 stops15h 55m

£589

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Wed 18/3

11:55-22:57

2 stops17h 02m

Boise Air Term. Gowen Fld

Wed 25/3

11:58-10:55

2 stops16h 57m

£687

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Wed 18/3

08:55-22:16

2 stops19h 21m

Idaho Falls Fanning Field

Wed 25/3

13:10-10:30

2 stops15h 20m

£706

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Mon 16/3

20:25-18:15

2 stops27h 50m

Idaho Falls Fanning Field

Sun 29/3

18:55-10:00

1 stop32h 05m

£723

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 17/3

17:50-18:15

2 stops30h 25m

Idaho Falls Fanning Field

Tue 24/3

13:10-10:00

1 stop14h 50m

£735

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 London to Idaho

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

What is the cheapest month to fly to Idaho?

The month of January is, on average, the cheapest month to fly to Idaho from London, with most prices found around £567. If you’re not able to fly to Idaho in January, then September is your next best option. Flight prices from London to Idaho during September average around £573.

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

You are more likely to see cheaper flights to Idaho from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around £725 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from London for as low as £559 on momondo.

Can stopping save me money on London to Idaho flights?

You could potentially save up to 47% on your flight if you consider stops on a London to Idaho flight.

Cheap London to Idaho flight deals and tips

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

Fastest flight time	13h 55m
Direct flights	None

The fastest flight from London to Idaho takes 13h 55m

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

Search flight deals

When did momondo last update prices for flights from London to Idaho?
Prices for flights from London to Idaho are refreshed on a daily basis.
How many operators does momondo search for flights from London to Idaho?
As of February 2026, there are 4 operators available to choose from for flights from London to Idaho.
How old do you have to be to fly from London to Idaho?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Idaho.
What documentation or ID do you need to fly to Idaho?
The required travel and health documents for your Idaho trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from London to Idaho

Compare and see reviews for airlines that fly from London to Idaho with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom £525	Free Cancellation	Rating 6.8 7,758 reviews	Search Lufthansa flights
United Airlines	PriceFrom £527	Free Cancellation	Rating 7.4 9,231 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £588	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Idaho from London.

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

Yes. All flights to Idaho from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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 London to Idaho.

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

Of course. momondo tracks the price of London to Idaho flights. All you need is a valid email address and we will do the rest; it is that quick and easy.