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

Lufthansa, Delta, and Alaska 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 41% of people opting to fly with this airline when travelling to Idaho. Keep in mind that there are 4 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 June 2026, there are 5 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.

£339 Cheap Flights from London to Idaho in 2026

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

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.

07:40 - 23:59

LHR

BOI

23h 19m

2 stops

10:39 - 07:30

BOI

LHR

37h 51m

2 stops

£623United Airlines

Wed, 4 Nov - Sun, 8 Nov

07:40 - 23:59

LHR

BOI

23h 19m

2 stops

17:22 - 09:40

BOI

LHR

33h 18m

1 stop

£625United Airlines

Wed, 4 Nov - Sun, 8 Nov

13:05 - 10:30

LHR

GEG

29h 25m

2 stops

15:54 - 09:40

GEG

LHR

33h 46m

1 stop

£653United Airlines

Fri, 4 Sep - Mon, 7 Sep

10:35 - 18:51

LHR

GEG

16h 16m

1 stop

13:04 - 11:10

GEG

LHR

14h 06m

1 stop

£672Lufthansa

Tue, 1 Sep - Tue, 8 Sep

14:50 - 20:46

LHR

GEG

13h 56m

1 stop

13:09 - 07:25

GEG

LHR

34h 16m

1 stop

£708Lufthansa

Fri, 4 Sep - Fri, 18 Sep

06:40 - 19:14

LHR

GEG

20h 34m

2 stops

13:00 - 16:25

GEG

LHR

19h 25m

3 stops

£739Scandinavian Airlines

Tue, 1 Sep - Tue, 8 Sep

15:40 - 23:59

LGW

GEG

16h 19m

2 stops

20:33 - 14:40

GEG

LGW

34h 07m

2 stops

£748Icelandair

Fri, 4 Sep - Mon, 7 Sep

10:00 - 19:27

LCY

GEG

17h 27m

2 stops

13:00 - 17:20

GEG

LCY

20h 20m

2 stops

£805Virgin Atlantic

Fri, 9 Oct - Tue, 20 Oct

15:40 - 23:54

LGW

GEG

16h 14m

2 stops

12:44 - 14:40

GEG

LGW

17h 56m

2 stops

£832Icelandair

Sat, 10 Oct - Fri, 16 Oct

08:25 - 23:09

LCY

GEG

22h 44m

2 stops

13:00 - 16:40

GEG

LCY

19h 40m

2 stops

£967Virgin Atlantic

Fri, 4 Sep - Mon, 7 Sep

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

United Airlines flights from London to Idaho

Our best United Airlines deals on London to Idaho flight tickets

United Airlines

4 Nov

LHR07:40London Heathrow

23h 19m

2 stops

BOI23:59Boise Air Term. Gowen Fld

8 Nov

BOI10:39Boise Air Term. Gowen Fld

37h 51m

2 stops

LHR07:30London Heathrow

£623

United Airlines

4 Nov

LHR07:40London Heathrow

23h 19m

2 stops

BOI23:59Boise Air Term. Gowen Fld

8 Nov

BOI17:22Boise Air Term. Gowen Fld

33h 18m

1 stop

LHR09:40London Heathrow

£625

United Airlines

4 Sept

LHR13:05London Heathrow

29h 25m

2 stops

GEG10:30Spokane

7 Sept

GEG15:54Spokane

33h 46m

1 stop

LHR09:40London Heathrow

£653

Finnair flights from London to Idaho

Our best Finnair deals on London to Idaho flight tickets

Finnair

8 Jul

LHR14:25London Heathrow

15h 56m

1 stop

BOI23:21Boise Air Term. Gowen Fld

5 Aug

BOI06:44Boise Air Term. Gowen Fld

19h 16m

1 stop

LHR09:00London Heathrow

£773

Finnair

23 Jun

LHR14:25London Heathrow

15h 03m

1 stop

BOI22:28Boise Air Term. Gowen Fld

4 Jul

BOI15:12Boise Air Term. Gowen Fld

12h 18m

1 stop

LHR10:30London Heathrow

£803

Finnair

23 Jun

LHR10:05London Heathrow

19h 23m

1 stop

BOI22:28Boise Air Term. Gowen Fld

4 Jul

BOI15:12Boise Air Term. Gowen Fld

12h 18m

1 stop

LHR10:30London Heathrow

£804

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 4/11

07:40-23:59

2 stops23h 19m

Boise Air Term. Gowen Fld

Sun 8/11

10:39-07:30

2 stops37h 51m

£623

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 4/11

07:40-23:59

2 stops23h 19m

Boise Air Term. Gowen Fld

Sun 8/11

17:22-09:40

1 stop33h 18m

£625

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 4/9

13:05-10:30

2 stops29h 25m

Spokane

Mon 7/9

15:54-09:40

1 stop33h 46m

£653

Fastest return journey

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 1/9

10:35-18:51

1 stop16h 16m

Spokane

Tue 8/9

13:04-11:10

1 stop14h 06m

£672

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 4/9

14:50-20:46

1 stop13h 56m

Spokane

Fri 18/9

13:09-07:25

1 stop34h 16m

£708

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 1/9

06:40-19:14

2 stops20h 34m

Spokane

Tue 8/9

13:00-16:25

3 stops19h 25m

£739

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Fri 4/9

15:40-23:59

2 stops16h 19m

Spokane

Mon 7/9

20:33-14:40

2 stops34h 07m

£748

LondonSpokane

LCY - GEG

LCYGEG

London City

Fri 9/10

10:00-19:27

2 stops17h 27m

Spokane

Tue 20/10

13:00-17:20

2 stops20h 20m

£805

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Sat 10/10

15:40-23:54

2 stops16h 14m

Spokane

Fri 16/10

12:44-14:40

2 stops17h 56m

£832

LondonSpokane

LCY - GEG

LCYGEG

London City

Fri 4/9

08:25-23:09

2 stops22h 44m

Spokane

Mon 7/9

13:00-16:40

2 stops19h 40m

£967

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 £502. 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 £508.

Can stopping save me money on London to Idaho flights?

You could potentially save up to 42% 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	12h 29m
Direct flights	None

The fastest flight from London to Idaho takes 12h 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 June 2026, there are 5 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 £508	Free Cancellation	Rating 6.8 8,062 reviews	Search Lufthansa flights
United Airlines	PriceFrom £547	Free Cancellation	Rating 7.4 9,826 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £595	Free Cancellation	Rating 7.5 690 reviews	Search Virgin Atlantic flights
Alaska Airlines	PriceFrom £735	Free Cancellation	Rating 7.9 12,508 reviews	Search Alaska Airlines 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.