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

United Airlines, Lufthansa, 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 40% 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 September 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.

£373 Cheap Flights from London to Idaho in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from London to Idaho

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

08:55 - 21:11LHR London Heathrow-GEG Spokane

20h 16m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

06:00 - 10:40GEG Spokane-LHR London Heathrow

20h 40m1 stop Seattle/Tacoma Intl

£648Multiple Airlines

Mon, 14 Dec - Mon, 28 Dec

12:20 - 22:06LHR London Heathrow-BOI Boise Air Term. Gowen Fld

15h 46m1 stop Seattle/Tacoma Intl

13:53 - 10:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

13h 47m1 stop Seattle/Tacoma Intl

£663Multiple Airlines

Wed, 28 Oct - Wed, 4 Nov

14:45 - 22:27LHR London Heathrow-GEG Spokane

15h 42m1 stop Seattle/Tacoma Intl

12:35 - 12:20GEG Spokane-LHR London Heathrow

15h 45m1 stop Seattle/Tacoma Intl

£674Alaska Airlines

Thu, 14 Jan - Mon, 18 Jan

17:00 - 11:39LHR London Heathrow-GEG Spokane

26h 39m1 stop Seattle/Tacoma Intl

17:43 - 15:05GEG Spokane-LHR London Heathrow

13h 22m1 stop Seattle/Tacoma Intl

£675Alaska Airlines

Mon, 5 Oct - Mon, 19 Oct

13:30 - 18:03LHR London Heathrow-BOI Boise Air Term. Gowen Fld

34h 33m2 stops Frankfurt am Main Denver Intl

19:10 - 09:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

31h 30m2 stops San Francisco Denver Intl

£678United Airlines

Tue, 27 Oct - Tue, 3 Nov

14:50 - 13:03LHR London Heathrow-BOI Boise Air Term. Gowen Fld

29h 13m2 stops Denver Intl San Francisco

05:00 - 09:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

21h 40m1 stop Denver Intl

£747United Airlines

Tue, 20 Oct - Thu, 26 Nov

17:10 - 23:44LHR London Heathrow-GEG Spokane

38h 34m2 stops Amsterdam Schiphol Salt Lake City

17:38 - 06:20GEG Spokane-LHR London Heathrow

28h 42m2 stops Seattle/Tacoma Intl New York John F Kennedy Intl

£753Virgin Atlantic

Mon, 5 Oct - Sun, 18 Oct

17:10 - 23:44LHR London Heathrow-GEG Spokane

38h 34m2 stops Amsterdam Schiphol Salt Lake City

19:25 - 11:20GEG Spokane-LHR London Heathrow

31h 55m1 stop Seattle/Tacoma Intl

£753Virgin Atlantic

Mon, 5 Oct - Sun, 18 Oct

07:30 - 21:34LHR London Heathrow-BOI Boise Air Term. Gowen Fld

21h 04m2 stops Frankfurt am Main Denver Intl

14:51 - 09:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

11h 49m1 stop Denver Intl

£767Lufthansa

Sat, 21 Nov - Sat, 28 Nov

09:50 - 21:32LCY London City-BOI Boise Air Term. Gowen Fld

17h 42m2 stops Frankfurt am Main Denver Intl

14:51 - 17:40BOI Boise Air Term. Gowen Fld-LCY London City

19h 49m2 stops Denver Intl Frankfurt am Main

£790Lufthansa

Tue, 27 Oct - Tue, 3 Nov

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

27 Oct

LHR13:30London Heathrow

34h 33m

2 stops

BOI18:03Boise Air Term. Gowen Fld

3 Nov

BOI19:10Boise Air Term. Gowen Fld

31h 30m

2 stops

LHR09:40London Heathrow

£678

United Airlines

6 Dec

LHR07:30London Heathrow

46h 45m

2 stops

GEG22:15Spokane

27 Dec

GEG07:45Spokane

41h 55m

2 stops

LHR09:40London Heathrow

£739

United Airlines

20 Oct

LHR14:50London Heathrow

29h 13m

2 stops

BOI13:03Boise Air Term. Gowen Fld

26 Nov

BOI05:00Boise Air Term. Gowen Fld

21h 40m

1 stop

LHR09:40London Heathrow

£747

Lufthansa flights from London to Idaho

Our best Lufthansa deals on London to Idaho flight tickets

Lufthansa

21 Nov

LHR07:30London Heathrow

21h 04m

2 stops

BOI21:34Boise Air Term. Gowen Fld

28 Nov

BOI14:51Boise Air Term. Gowen Fld

11h 49m

1 stop

LHR09:40London Heathrow

£767

Lufthansa

27 Oct

LCY09:50London City

17h 42m

2 stops

BOI21:32Boise Air Term. Gowen Fld

3 Nov

BOI14:51Boise Air Term. Gowen Fld

19h 49m

2 stops

LCY17:40London City

£790

Lufthansa

29 Oct

LCY09:50London City

18h 21m

2 stops

GEG21:11Spokane

5 Nov

GEG07:00Spokane

26h 40m

2 stops

LCY17:40London City

£825

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 14/12

08:55-21:11

2 stops20h 16m

Spokane

Mon 28/12

06:00-10:40

1 stop20h 40m

£648

Fastest return journey

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 28/10

12:20-22:06

1 stop15h 46m

Boise Air Term. Gowen Fld

Wed 4/11

13:53-10:40

1 stop13h 47m

£663

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Thu 14/1

14:45-22:27

1 stop15h 42m

Spokane

Mon 18/1

12:35-12:20

1 stop15h 45m

£674

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 5/10

17:00-11:39

1 stop26h 39m

Spokane

Mon 19/10

17:43-15:05

1 stop13h 22m

£675

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Tue 27/10

13:30-18:03

2 stops34h 33m

Boise Air Term. Gowen Fld

Tue 3/11

19:10-09:40

2 stops31h 30m

£678

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Tue 20/10

14:50-13:03

2 stops29h 13m

Boise Air Term. Gowen Fld

Thu 26/11

05:00-09:40

1 stop21h 40m

£747

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 5/10

17:10-23:44

2 stops38h 34m

Spokane

Sun 18/10

17:38-06:20

2 stops28h 42m

£753

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 5/10

17:10-23:44

2 stops38h 34m

Spokane

Sun 18/10

19:25-11:20

1 stop31h 55m

£753

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 21/11

07:30-21:34

2 stops21h 04m

Boise Air Term. Gowen Fld

Sat 28/11

14:51-09:40

1 stop11h 49m

£767

LondonBoise

LCY London City - BOI Boise Air Term. Gowen Fld

LCYBOI

London City

Tue 27/10

09:50-21:32

2 stops17h 42m

Boise Air Term. Gowen Fld

Tue 3/11

14:51-17:40

2 stops19h 49m

£790

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 April is, on average, the cheapest month to fly to Idaho from London, with most prices found around £627. If you’re not able to fly to Idaho in April, then March is your next best option. Flight prices from London to Idaho during March average around £647.

Can stopping save me money on London to Idaho flights?

You could potentially save up to 57% 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

Best price found	£373
Fastest flight time	14h 18m
Direct flights	None

The best one-way flight to Idaho from London in the past 72 hours is £373. The best return flight deal from London to Idaho found on momondo in the last 72 hours is £648.

The fastest flight from London to Idaho takes 14h 18m

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 September 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 8,221 reviews	Search Lufthansa flights
United Airlines	PriceFrom £522	Free Cancellation	Rating 7.4 10,214 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £670	Free Cancellation	Rating 7.4 694 reviews	Search Virgin Atlantic flights
Alaska Airlines	PriceFrom £731	Free Cancellation	Rating 7.9 12,929 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.