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

Lufthansa and United Airlines are the most popular carriers 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 44% 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.

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

There are 4 operators available for flights from London Heathrow Airport to Idaho as of July 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.

£455 Cheap Flights from London Heathrow Airport to Idaho in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from London Heathrow Airport to Idaho

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:40 - 22:34

LHR

BOI

22h 54m

2 stops

10:34 - 17:40

BOI

LHR

24h 06m

2 stops

£566Scandinavian Airlines

Fri, 11 Sep - Sat, 26 Sep

19:30 - 17:00

LHR

GEG

29h 30m

2 stops

13:00 - 13:35

GEG

LHR

16h 35m

2 stops

£569Scandinavian Airlines

Fri, 4 Sep - Fri, 11 Sep

10:35 - 21:24

LHR

BOI

17h 49m

1 stop

08:23 - 09:00

BOI

LHR

17h 37m

1 stop

£605United Airlines

Fri, 4 Sep - Fri, 11 Sep

08:00 - 23:59

LHR

BOI

22h 59m

2 stops

14:20 - 11:10

BOI

LHR

13h 50m

1 stop

£689United Airlines

Tue, 6 Oct - Tue, 13 Oct

08:00 - 22:53

LHR

BOI

21h 53m

1 stop

14:41 - 12:25

BOI

LHR

14h 44m

1 stop

£711Lufthansa

Mon, 7 Sep - Mon, 14 Sep

20:55 - 17:09

LHR

GEG

28h 14m

2 stops

15:30 - 06:20

GEG

LHR

30h 50m

2 stops

£718Virgin Atlantic

Tue, 8 Sep - Tue, 6 Oct

09:55 - 22:54

LHR

GEG

20h 59m

2 stops

13:00 - 15:35

GEG

LHR

18h 35m

1 stop

£722Virgin Atlantic

Tue, 8 Sep - Tue, 6 Oct

06:55 - 21:37

LHR

BOI

21h 42m

2 stops

14:41 - 09:40

BOI

LHR

11h 59m

1 stop

£725Lufthansa

Mon, 7 Sep - Mon, 14 Sep

17:00 - 23:44

LHR

BOI

13h 44m

1 stop

10:00 - 15:05

BOI

LHR

22h 05m

1 stop

£729Alaska Airlines

Fri, 11 Sep - Sat, 26 Sep

17:00 - 15:20

LHR

IDA

29h 20m

1 stop

14:01 - 15:05

IDA

LHR

18h 04m

1 stop

£765Alaska Airlines

Tue, 1 Sep - Fri, 25 Sep

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United Airlines flights from London Heathrow Airport to Idaho

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

United Airlines

4 Sept

LHR10:35London Heathrow

17h 49m

1 stop

BOI21:24Boise Air Term. Gowen Fld

11 Sept

BOI08:23Boise Air Term. Gowen Fld

17h 37m

1 stop

LHR09:00London Heathrow

£605

United Airlines

6 Oct

LHR08:00London Heathrow

22h 59m

2 stops

BOI23:59Boise Air Term. Gowen Fld

13 Oct

BOI14:20Boise Air Term. Gowen Fld

13h 50m

1 stop

LHR11:10London Heathrow

£689

United Airlines

13 Jan

LHR07:40London Heathrow

23h 19m

2 stops

BOI23:59Boise Air Term. Gowen Fld

27 Jan

BOI08:40Boise Air Term. Gowen Fld

16h 15m

1 stop

LHR07:55London Heathrow

£696

Lufthansa flights from London Heathrow Airport to Idaho

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

Lufthansa

7 Sept

LHR08:00London Heathrow

21h 53m

1 stop

BOI22:53Boise Air Term. Gowen Fld

14 Sept

BOI14:41Boise Air Term. Gowen Fld

14h 44m

1 stop

LHR12:25London Heathrow

£711

Lufthansa

8 Sept

LHR20:25London Heathrow

32h 49m

2 stops

GEG21:14Spokane

15 Sept

GEG13:04Spokane

14h 06m

1 stop

LHR11:10London Heathrow

£732

Lufthansa

8 Sept

LHR14:50London Heathrow

14h 24m

1 stop

GEG21:14Spokane

6 Oct

GEG13:05Spokane

34h 20m

1 stop

LHR07:25London Heathrow

£733

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

Fri 11/9

06:40-22:34

2 stops22h 54m

Boise Air Term. Gowen Fld

Sat 26/9

10:34-17:40

2 stops24h 06m

£566

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 4/9

19:30-17:00

2 stops29h 30m

Spokane

Fri 11/9

13:00-13:35

2 stops16h 35m

£569

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 4/9

10:35-21:24

1 stop17h 49m

Boise Air Term. Gowen Fld

Fri 11/9

08:23-09:00

1 stop17h 37m

£605

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 6/10

08:00-23:59

2 stops22h 59m

Boise Air Term. Gowen Fld

Tue 13/10

14:20-11:10

1 stop13h 50m

£689

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 7/9

08:00-22:53

1 stop21h 53m

Boise Air Term. Gowen Fld

Mon 14/9

14:41-12:25

1 stop14h 44m

£711

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 8/9

20:55-17:09

2 stops28h 14m

Spokane

Tue 6/10

15:30-06:20

2 stops30h 50m

£718

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 8/9

09:55-22:54

2 stops20h 59m

Spokane

Tue 6/10

13:00-15:35

1 stop18h 35m

£722

Fastest return journey

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 7/9

06:55-21:37

2 stops21h 42m

Boise Air Term. Gowen Fld

Mon 14/9

14:41-09:40

1 stop11h 59m

£725

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 11/9

17:00-23:44

1 stop13h 44m

Boise Air Term. Gowen Fld

Sat 26/9

10:00-15:05

1 stop22h 05m

£729

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

17:00-15:20

1 stop29h 20m

Idaho Falls Fanning Field

Fri 25/9

14:01-15:05

1 stop18h 04m

£765

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 November is, on average, the cheapest month to fly to Idaho from London Heathrow Airport, with most prices found around £604. If you’re not able to fly to Idaho in November, then April is your next best option. Flight prices from London Heathrow Airport to Idaho during April average around £632.

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

You could potentially save up to 62% 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	15h 15m
Direct flights	None

The fastest flight from London Heathrow Airport to Idaho takes 15h 15m

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 4 operators available for flights from London Heathrow Airport to Idaho as of July 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 £511	Free Cancellation	Rating 6.8 8,161 reviews	Search Lufthansa flights
United Airlines	PriceFrom £556	Free Cancellation	Rating 7.4 10,045 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom £604	Free Cancellation	Rating 7.5 694 reviews	Search Virgin Atlantic flights
Alaska Airlines	PriceFrom £740	Free Cancellation	Rating 7.9 12,721 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.