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

Lufthansa, Air Canada, 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 48% 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 December 2025, 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.

£390 Cheap Flights from London to Idaho in 2025/26

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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.

12:15 - 23:01

LHR

BOI

17h 46m2 stops

09:02 - 10:50

BOI

LHR

18h 48m2 stops

£490Multiple Airlines

Sat, 31 Jan - Sat, 7 Feb

12:15 - 21:25

LHR

GEG

17h 10m2 stops

07:30 - 19:30

GEG

LHR

28h 00m2 stops

£502Multiple Airlines

Thu, 15 Jan - Thu, 22 Jan

06:35 - 21:29

LHR

BOI

20h 54m2 stops

14:40 - 17:05

BOI

LHR

19h 25m2 stops

£553Lufthansa

Tue, 10 Mar - Tue, 31 Mar

06:35 - 21:03

LHR

GEG

21h 28m2 stops

06:00 - 06:40

GEG

LHR

17h 40m2 stops

£558United Airlines

Tue, 10 Mar - Tue, 17 Mar

16:35 - 21:12

LHR

GEG

35h 37m2 stops

06:00 - 08:15

GEG

LHR

19h 15m1 stop

£559Iberia

Tue, 10 Mar - Tue, 17 Mar

06:35 - 21:18

LHR

GEG

21h 43m2 stops

06:00 - 06:20

GEG

LHR

17h 20m2 stops

£559United Airlines

Tue, 10 Mar - Tue, 17 Mar

07:40 - 21:29

LHR

BOI

19h 49m2 stops

10:35 - 09:40

BOI

LHR

16h 05m1 stop

£559Lufthansa

Tue, 10 Mar - Tue, 31 Mar

16:30 - 21:12

LHR

GEG

35h 42m1 stop

06:00 - 06:50

GEG

LHR

17h 50m1 stop

£563Iberia

Tue, 10 Mar - Tue, 17 Mar

20:25 - 14:50

LHR

SUN

25h 25m2 stops

12:59 - 10:00

SUN

LHR

14h 01m1 stop

£784KLM

Fri, 30 Jan - Fri, 6 Feb

20:25 - 16:24

LHR

JAC

26h 59m2 stops

07:20 - 06:25

JAC

LHR

16h 05m2 stops

£876Virgin Atlantic

Fri, 30 Jan - Fri, 6 Feb

Scandinavian Airlines flights from London to Idaho

Our best Scandinavian Airlines deals on London to Idaho flight tickets

Scandinavian Airlines

20 Apr

LHR18:40London Heathrow

35h 24m

2 stops

BOI23:04Boise Air Term. Gowen Fld

27 Apr

BOI13:00Boise Air Term. Gowen Fld

44h 00m

2 stops

LHR16:00London Heathrow

£602

Find similar

Scandinavian Airlines

20 Apr

LHR10:20London Heathrow

19h 44m

2 stops

BOI23:04Boise Air Term. Gowen Fld

27 Apr

BOI13:00Boise Air Term. Gowen Fld

22h 30m

2 stops

LHR18:30London Heathrow

£603

Find similar

Scandinavian Airlines

20 Apr

LHR10:20London Heathrow

19h 44m

2 stops

BOI23:04Boise Air Term. Gowen Fld

27 Apr

BOI13:00Boise Air Term. Gowen Fld

25h 35m

3 stops

LHR21:35London Heathrow

£641

Find similar

Air Canada flights from London to Idaho

Our best Air Canada deals on London to Idaho flight tickets

Air Canada

7 Mar

LHR14:30London Heathrow

39h 27m

2 stops

BOI22:57Boise Air Term. Gowen Fld

14 Mar

BOI17:30Boise Air Term. Gowen Fld

31h 40m

2 stops

LHR07:10London Heathrow

£814

Find similar

Air Canada

7 Mar

LHR14:30London Heathrow

39h 27m

2 stops

BOI22:57Boise Air Term. Gowen Fld

14 Mar

BOI05:00Boise Air Term. Gowen Fld

21h 30m

2 stops

LHR08:30London Heathrow

£822

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 31/1

12:15-23:01

2 stops17h 46m

Boise Air Term. Gowen Fld

Sat 7/2

09:02-10:50

2 stops18h 48m

£490

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 15/1

12:15-21:25

2 stops17h 10m

Spokane

Thu 22/1

07:30-19:30

2 stops28h 00m

£502

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 10/3

06:35-21:29

2 stops20h 54m

Boise Air Term. Gowen Fld

Tue 31/3

14:40-17:05

2 stops19h 25m

£553

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:03

2 stops21h 28m

Spokane

Tue 17/3

06:00-06:40

2 stops17h 40m

£558

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

16:35-21:12

2 stops35h 37m

Spokane

Tue 17/3

06:00-08:15

1 stop19h 15m

£559

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

06:35-21:18

2 stops21h 43m

Spokane

Tue 17/3

06:00-06:20

2 stops17h 20m

£559

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 10/3

07:40-21:29

2 stops19h 49m

Boise Air Term. Gowen Fld

Tue 31/3

10:35-09:40

1 stop16h 05m

£559

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/3

16:30-21:12

1 stop35h 42m

Spokane

Tue 17/3

06:00-06:50

1 stop17h 50m

£563

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Fri 30/1

20:25-14:50

2 stops25h 25m

Hailey Sun Valley-Friedman

Fri 6/2

12:59-10:00

1 stop14h 01m

£784

LondonJackson

LHR - JAC

LHRJAC

London Heathrow

Fri 30/1

20:25-16:24

2 stops26h 59m

Jackson Hole

Fri 6/2

07:20-06:25

2 stops16h 05m

£876

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 September is, on average, the cheapest month to fly to Idaho from London, with most prices found around £591. If you’re not able to fly to Idaho in September, then February is your next best option. Flight prices from London to Idaho during February average around £600.

What is the cheapest day to depart on your flight to Idaho?

On average, the least expensive day to fly to Idaho from London is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £630. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £869.

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

According to our data, the cheapest time of day to fly to Idaho is at midday. momondo users have found flights departing from London to Idaho at midday for as low as £650. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive, with an average ticket price of £842.

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 £752 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 £573 on momondo.

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	14h 38m
Direct flights	None

The fastest flight from London to Idaho takes 14h 38m

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 December 2025, 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 £537	Free Cancellation	Rating 6.8 7,634 reviews	Search Lufthansa flights
United Airlines	PriceFrom £540	Free Cancellation	Rating 7.4 9,091 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £602	Free Cancellation	Rating 7.5 675 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.