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

Lufthansa, WestJet, and United Airlines 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 April 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.

£405 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.

08:40 - 10:35

LHR

GEG

33h 55m

2 stops

16:00 - 09:40

GEG

LHR

33h 40m

1 stop

£656United Airlines

Wed, 9 Sep - Sun, 13 Sep

08:40 - 10:35

LHR

GEG

33h 55m

2 stops

11:16 - 06:45

GEG

LHR

35h 29m

1 stop

£657United Airlines

Wed, 9 Sep - Sun, 13 Sep

08:40 - 21:16

LHR

GEG

20h 36m

2 stops

12:57 - 07:25

GEG

LHR

34h 28m

1 stop

£659United Airlines

Wed, 9 Sep - Sun, 13 Sep

19:30 - 22:58

LHR

BOI

34h 28m

2 stops

15:23 - 16:00

BOI

LHR

41h 37m

2 stops

£705Scandinavian Airlines

Wed, 27 May - Wed, 3 Jun

11:40 - 23:58

LHR

BOI

19h 18m

1 stop

18:07 - 15:35

BOI

LHR

14h 28m

1 stop

£742Multiple Airlines

Wed, 27 May - Wed, 3 Jun

11:25 - 21:05

LHR

GEG

17h 40m

1 stop

12:37 - 14:10

GEG

LHR

17h 33m

1 stop

£776Lufthansa

Mon, 6 Jul - Mon, 13 Jul

11:25 - 21:05

LHR

GEG

17h 40m

1 stop

12:37 - 11:10

GEG

LHR

14h 33m

1 stop

£777Lufthansa

Mon, 6 Jul - Mon, 13 Jul

15:40 - 23:59

LGW

GEG

16h 19m

2 stops

12:30 - 14:40

GEG

LGW

18h 10m

2 stops

£815Icelandair

Wed, 16 Sep - Sun, 20 Sep

13:05 - 22:56

LHR

IDA

16h 51m

2 stops

06:18 - 11:55

IDA

LHR

22h 37m

2 stops

£815Multiple Airlines

Tue, 1 Sep - Fri, 25 Sep

15:40 - 23:59

LGW

GEG

16h 19m

2 stops

12:30 - 14:40

GEG

LGW

18h 10m

2 stops

£816Icelandair

Wed, 16 Sep - Sun, 20 Sep

Air Canada flights from London to Idaho

Our best Air Canada deals on London to Idaho flight tickets

Air Canada

30 Sept

LHR09:30London Heathrow

31h 05m

2 stops

BOI09:35Boise Air Term. Gowen Fld

4 Oct

BOI17:44Boise Air Term. Gowen Fld

29h 51m

2 stops

LHR06:35London Heathrow

£776

Air Canada

30 Sept

LHR09:30London Heathrow

31h 05m

2 stops

BOI09:35Boise Air Term. Gowen Fld

4 Oct

BOI17:44Boise Air Term. Gowen Fld

29h 51m

2 stops

LHR06:35London Heathrow

£777

Air Canada

30 Sept

LHR09:30London Heathrow

31h 05m

2 stops

BOI09:35Boise Air Term. Gowen Fld

4 Oct

BOI17:44Boise Air Term. Gowen Fld

29h 51m

2 stops

LHR06:35London Heathrow

£779

Virgin Atlantic flights from London to Idaho

Our best Virgin Atlantic deals on London to Idaho flight tickets

Virgin Atlantic

10 Jun

LHR11:45London Heathrow

17h 43m

2 stops

BOI22:28Boise Air Term. Gowen Fld

17 Jun

BOI15:31Boise Air Term. Gowen Fld

13h 39m

1 stop

LHR12:10London Heathrow

£879

Virgin Atlantic

17 May

LHR18:30London Heathrow

13h 29m

1 stop

GEG23:59Spokane

7 Jun

GEG17:37Spokane

34h 33m

1 stop

LHR12:10London Heathrow

£900

Virgin Atlantic

4 Jun

LHR09:20London Heathrow

20h 08m

1 stop

BOI22:28Boise Air Term. Gowen Fld

6 Jun

BOI18:00Boise Air Term. Gowen Fld

35h 10m

1 stop

LHR12:10London Heathrow

£905

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 9/9

08:40-10:35

2 stops33h 55m

Spokane

Sun 13/9

16:00-09:40

1 stop33h 40m

£656

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 9/9

08:40-10:35

2 stops33h 55m

Spokane

Sun 13/9

11:16-06:45

1 stop35h 29m

£657

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 9/9

08:40-21:16

2 stops20h 36m

Spokane

Sun 13/9

12:57-07:25

1 stop34h 28m

£659

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 27/5

19:30-22:58

2 stops34h 28m

Boise Air Term. Gowen Fld

Wed 3/6

15:23-16:00

2 stops41h 37m

£705

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 27/5

11:40-23:58

1 stop19h 18m

Boise Air Term. Gowen Fld

Wed 3/6

18:07-15:35

1 stop14h 28m

£742

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 6/7

11:25-21:05

1 stop17h 40m

Spokane

Mon 13/7

12:37-14:10

1 stop17h 33m

£776

Fastest return journey

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 6/7

11:25-21:05

1 stop17h 40m

Spokane

Mon 13/7

12:37-11:10

1 stop14h 33m

£777

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Wed 16/9

15:40-23:59

2 stops16h 19m

Spokane

Sun 20/9

12:30-14:40

2 stops18h 10m

£815

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

13:05-22:56

2 stops16h 51m

Idaho Falls Fanning Field

Fri 25/9

06:18-11:55

2 stops22h 37m

£815

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Wed 16/9

15:40-23:59

2 stops16h 19m

Spokane

Sun 20/9

12:30-14:40

2 stops18h 10m

£816

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 £499. If you’re not able to fly to Idaho in January, then March is your next best option. Flight prices from London to Idaho during March average around £505.

Can stopping save me money on London to Idaho flights?

You could potentially save up to 56% 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 29m
Direct flights	None

The fastest flight from London to Idaho takes 13h 29m

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

Search flight deals

Frequently asked questions about flying from London to Idaho

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 April 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 £505	Free Cancellation	Rating 6.8 7,964 reviews	Search Lufthansa flights
United Airlines	PriceFrom £543	Free Cancellation	Rating 7.4 9,678 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £596	Free Cancellation	Rating 7.4 688 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.