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

Lufthansa is the most popular carrier operating from London Heathrow 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 Heathrow Airport according to our data. United Airlines is the first choice among our users, with 42% 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 Heathrow Airport to Idaho?

Prices for flights from London Heathrow Airport to Idaho refresh daily.

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

There are 5 operators available for flights from London Heathrow Airport to Idaho as of June 2026.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Idaho.

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

The travel and health documents you'll need for your trip to Idaho may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£435 Cheap Flights from London Heathrow Airport to Idaho in 2026

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Find the cheapest flights from London Heathrow Airport 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

09:00 - 21:15

LHR

BOI

19h 15m

2 stops

07:00 - 06:20

BOI

LHR

16h 20m

2 stops

£655United Airlines

Wed, 4 Nov - Wed, 11 Nov

10:35 - 18:51

LHR

GEG

16h 16m

1 stop

13:04 - 11:10

GEG

LHR

14h 06m

1 stop

£673Lufthansa

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

£740Scandinavian Airlines

Tue, 1 Sep - Tue, 8 Sep

10:05 - 21:20

LHR

IDA

18h 15m

1 stop

14:08 - 14:25

IDA

LHR

17h 17m

1 stop

£805Finnair

Tue, 1 Sep - Fri, 25 Sep

10:30 - 21:20

LHR

IDA

17h 50m

2 stops

07:00 - 07:20

IDA

LHR

17h 20m

2 stops

£828Finnair

Tue, 1 Sep - Fri, 25 Sep

17:00 - 09:38

LHR

SUN

23h 38m

1 stop

10:20 - 15:05

SUN

LHR

21h 45m

1 stop

£1,060Alaska Airlines

Thu, 16 Jul - Wed, 22 Jul

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Lufthansa flights from London Heathrow Airport to Idaho

Our best Lufthansa deals on London Heathrow Airport to Idaho flight tickets

Lufthansa

1 Sept

LHR10:35London Heathrow

16h 16m

1 stop

GEG18:51Spokane

8 Sept

GEG13:04Spokane

14h 06m

1 stop

LHR11:10London Heathrow

£673

Lufthansa

4 Sept

LHR14:50London Heathrow

13h 56m

1 stop

GEG20:46Spokane

18 Sept

GEG13:09Spokane

34h 16m

1 stop

LHR07:25London Heathrow

£708

Lufthansa

5 Dec

LHR13:45London Heathrow

29h 39m

1 stop

GEG11:24Spokane

12 Dec

GEG07:02Spokane

16h 23m

1 stop

LHR07:25London Heathrow

£714

Scandinavian Airlines flights from London Heathrow Airport to Idaho

Our best Scandinavian Airlines deals on London Heathrow Airport to Idaho flight tickets

Scandinavian Airlines

1 Sept

LHR06:40London Heathrow

20h 34m

2 stops

GEG19:14Spokane

8 Sept

GEG13:00Spokane

19h 25m

3 stops

LHR16:25London Heathrow

£740

Scandinavian Airlines

4 Sept

LHR21:05London Heathrow

27h 55m

3 stops

GEG17:00Spokane

18 Sept

GEG11:10Spokane

20h 50m

2 stops

LHR16:00London Heathrow

£740

Scandinavian Airlines

1 Sept

LHR07:05London Heathrow

20h 09m

3 stops

GEG19:14Spokane

8 Sept

GEG13:00Spokane

21h 50m

3 stops

LHR18:50London Heathrow

£743

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Idaho that are best for you.

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

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 4/11

09:00-21:15

2 stops19h 15m

Boise Air Term. Gowen Fld

Wed 11/11

07:00-06:20

2 stops16h 20m

£655

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

£673

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

£740

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

10:05-21:20

1 stop18h 15m

Idaho Falls Fanning Field

Fri 25/9

14:08-14:25

1 stop17h 17m

£805

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

10:30-21:20

2 stops17h 50m

Idaho Falls Fanning Field

Fri 25/9

07:00-07:20

2 stops17h 20m

£828

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Thu 16/7

17:00-09:38

1 stop23h 38m

Hailey Sun Valley-Friedman

Wed 22/7

10:20-15:05

1 stop21h 45m

£1,060

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 Heathrow Airport 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 March is, on average, the cheapest month to fly to Idaho from London Heathrow Airport, with most prices found around £509. If you’re not able to fly to Idaho in March, then November is your next best option. Flight prices from London Heathrow Airport to Idaho during November average around £543.

Can stopping save me money on London Heathrow Airport to Idaho flights?

You could potentially save up to 42% on your flight if you consider stops on a London Heathrow Airport to Idaho flight.

Cheap London Heathrow Airport to Idaho flight deals and tips

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

Fastest flight time	12h 29m
Direct flights	None

The fastest flight from London Heathrow Airport to Idaho takes 12h 29m

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

Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Idaho

When did momondo last update prices for flights from London Heathrow Airport to Idaho?
Prices for flights from London Heathrow Airport to Idaho refresh daily.
How many operators does momondo search for flights from London Heathrow Airport to Idaho?
There are 5 operators available for flights from London Heathrow Airport to Idaho as of June 2026.
How old do you have to be to fly from London Heathrow Airport to Idaho?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Idaho.
What documentation or ID do you need to fly to Idaho?
The travel and health documents you'll need for your trip to Idaho may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from London Heathrow Airport to Idaho

Compare and see reviews for airlines that fly from London Heathrow Airport 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 £836	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?

It is quick and easy to find London to Idaho flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Idaho that suits you.

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

Yes. momondo enables you to select and highlight flights to Idaho from London with this policy.

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

momondo provides multiple filters to help you find the best flight to Idaho from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for London to Idaho flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.