How long is the flight from United Kingdom to Idaho?

Flight times from United Kingdom to Idaho vary, but if you’re flying out of London and flying into Boise (one of the most popular routes), then the duration is 15h 32m on average. Another popular route from United Kingdom to Idaho is flying from Edinburgh to Boise, which will take roughly 17h 05m. Keep in mind that layovers or delays could extend your travel time.

Which airlines fly to Idaho?

United Airlines, Virgin Atlantic and Icelandair are the top three most popular airlines that fly to Idaho from United Kingdom according to our data. United Airlines is the first choice among our users, with 38% of people opting to fly with this airline when travelling to Idaho. Keep in mind that there are 6 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from United Kingdom to Idaho?

United Airlines, Delta, and Lufthansa are the most popular carriers operating from United Kingdom to Idaho

When did momondo last update prices for flights from United Kingdom to Idaho?

Prices for flights from United Kingdom to Idaho are updated daily.

How many operators does momondo search for flights from United Kingdom to Idaho?

There are 6 operators available for flights from United Kingdom to Idaho as of September 2026.

How old do you have to be to fly from United Kingdom 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 United Kingdom to Idaho.

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

The necessary travel and health documents for your Idaho trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£345 Cheap Flights from the United Kingdom to Idaho in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from the United Kingdom to Idaho

Return

One-way

Last minute

Recent return flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

17:45 - 23:55LHR London Heathrow-GEG Spokane

14h 10m1 stop Seattle/Tacoma Intl

13:38 - 10:40GEG Spokane-LHR London Heathrow

14h 02m1 stop Seattle/Tacoma Intl

£545Multiple Airlines

Thu, 15 Oct - Wed, 28 Oct

11:45 - 23:55LHR London Heathrow-GEG Spokane

20h 10m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

13:38 - 10:40GEG Spokane-LHR London Heathrow

14h 02m1 stop Seattle/Tacoma Intl

£592Multiple Airlines

Thu, 15 Oct - Wed, 28 Oct

14:45 - 18:11LHR London Heathrow-BOI Boise Air Term. Gowen Fld

34h 26m1 stop Seattle/Tacoma Intl

16:00 - 12:20BOI Boise Air Term. Gowen Fld-LHR London Heathrow

13h 20m1 stop Seattle/Tacoma Intl

£672Alaska Airlines

Thu, 4 Mar - Mon, 8 Mar

14:45 - 22:20LHR London Heathrow-BOI Boise Air Term. Gowen Fld

14h 35m1 stop Seattle/Tacoma Intl

06:00 - 12:20BOI Boise Air Term. Gowen Fld-LHR London Heathrow

23h 20m2 stops Portland Seattle/Tacoma Intl

£696Alaska Airlines

Thu, 4 Mar - Mon, 8 Mar

10:00 - 21:37LGW London Gatwick-GEG Spokane

19h 37m2 stops Paris Charles de Gaulle Los Angeles Los Angeles

07:00 - 09:00GEG Spokane-LGW London Gatwick

19h 00m2 stops Minneapolis St Paul Paris Charles de Gaulle

£754Virgin Atlantic

Tue, 9 Mar - Tue, 16 Mar

07:40 - 22:51LHR London Heathrow-BOI Boise Air Term. Gowen Fld

22h 11m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl

12:31 - 07:55BOI Boise Air Term. Gowen Fld-LHR London Heathrow

12h 24m1 stop Chicago O'Hare Intl

£763Lufthansa

Sat, 21 Nov - Sat, 28 Nov

07:45 - 19:27LCY London City-GEG Spokane

19h 42m2 stops Amsterdam Schiphol Minneapolis St Paul

07:00 - 08:50GEG Spokane-LCY London City

18h 50m2 stops Minneapolis St Paul Amsterdam Schiphol

£774Virgin Atlantic

Tue, 9 Mar - Tue, 16 Mar

07:30 - 23:59LHR London Heathrow-BOI Boise Air Term. Gowen Fld

23h 29m2 stops Frankfurt am Main San Francisco

08:00 - 07:55BOI Boise Air Term. Gowen Fld-LHR London Heathrow

16h 55m1 stop Chicago O'Hare Intl

£775United Airlines

Wed, 30 Sep - Fri, 4 Dec

07:30 - 23:59LHR London Heathrow-BOI Boise Air Term. Gowen Fld

23h 29m2 stops Frankfurt am Main San Francisco

16:24 - 13:30BOI Boise Air Term. Gowen Fld-LHR London Heathrow

38h 06m2 stops San Francisco Los Angeles Los Angeles

£775United Airlines

Wed, 30 Sep - Fri, 4 Dec

09:50 - 21:11LCY London City-GEG Spokane

19h 21m2 stops Frankfurt am Main Denver Intl

07:00 - 17:40GEG Spokane-LCY London City

26h 40m2 stops San Francisco Frankfurt am Main

£833Lufthansa

Tue, 10 Nov - Tue, 24 Nov

Recent last minute flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

18:40 - 18:40LHR London Heathrow-BOI Boise Air Term. Gowen Fld

31h 00m2 stops Kastrup Copenhagen Seattle/Tacoma Intl

12:17 - 17:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

22h 23m2 stops Seattle/Tacoma Intl Kastrup Copenhagen

£794Scandinavian Airlines

Mon, 14 Sep - Tue, 22 Sep

09:55 - 23:00LHR London Heathrow-BOI Boise Air Term. Gowen Fld

20h 05m1 stop Los Angeles Los Angeles

18:47 - 17:35BOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 48m1 stop Los Angeles Los Angeles

£813Multiple Airlines

Tue, 15 Sep - Thu, 24 Sep

14:30 - 23:00LHR London Heathrow-BOI Boise Air Term. Gowen Fld

15h 30m1 stop Los Angeles Los Angeles

18:47 - 17:35BOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 48m1 stop Los Angeles Los Angeles

£813Multiple Airlines

Wed, 16 Sep - Wed, 23 Sep

17:00 - 23:44LHR London Heathrow-BOI Boise Air Term. Gowen Fld

13h 44m1 stop Seattle/Tacoma Intl

16:20 - 15:05BOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 45m1 stop Seattle/Tacoma Intl

£948Alaska Airlines

Thu, 17 Sep - Sun, 20 Sep

17:00 - 23:44LHR London Heathrow-BOI Boise Air Term. Gowen Fld

13h 44m1 stop Seattle/Tacoma Intl

13:31 - 15:05BOI Boise Air Term. Gowen Fld-LHR London Heathrow

18h 34m2 stops Portland Seattle/Tacoma Intl

£985Alaska Airlines

Wed, 16 Sep - Mon, 21 Sep

12:00 - 23:03LHR London Heathrow-BOI Boise Air Term. Gowen Fld

18h 03m2 stops Newark Denver Intl

17:30 - 12:25BOI Boise Air Term. Gowen Fld-LHR London Heathrow

11h 55m1 stop Denver Intl

£1,016United Airlines

Tue, 15 Sep - Thu, 24 Sep

12:00 - 23:03LHR London Heathrow-BOI Boise Air Term. Gowen Fld

18h 03m2 stops Newark Denver Intl

17:40 - 12:35BOI Boise Air Term. Gowen Fld-LHR London Heathrow

11h 55m1 stop Denver Intl

£1,016United Airlines

Tue, 15 Sep - Wed, 23 Sep

07:00 - 21:14MAN Manchester-GEG Spokane

22h 14m2 stops Munich Franz Josef Strauss Denver Intl

13:09 - 23:15GEG Spokane-MAN Manchester

26h 06m2 stops San Francisco Munich Franz Josef Strauss

£1,045Lufthansa

Mon, 14 Sep - Mon, 21 Sep

09:20 - 22:00LHR London Heathrow-BOI Boise Air Term. Gowen Fld

19h 40m1 stop Atlanta Hartsfield-Jackson

11:03 - 10:00BOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 57m1 stop Salt Lake City

£1,064Virgin Atlantic

Mon, 14 Sep - Mon, 21 Sep

07:00 - 21:14MAN Manchester-GEG Spokane

22h 14m2 stops Munich Franz Josef Strauss Denver Intl

13:09 - 23:15GEG Spokane-MAN Manchester

26h 06m2 stops San Francisco Munich Franz Josef Strauss

£1,153Lufthansa

Mon, 14 Sep - Mon, 21 Sep

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Air Canada flights from United Kingdom to Idaho

Our best Air Canada deals on United Kingdom to Idaho flight tickets

Air Canada

21 Nov

LHR14:30London Heathrow

40h 03m

2 stops

BOI23:33Boise Air Term. Gowen Fld

28 Nov

BOI06:30Boise Air Term. Gowen Fld

19h 00m

2 stops

LHR08:30London Heathrow

£811

Air Canada

24 Dec

LHR14:30London Heathrow

40h 14m

2 stops

BOI23:44Boise Air Term. Gowen Fld

29 Dec

BOI12:31Boise Air Term. Gowen Fld

15h 49m

2 stops

LHR11:20London Heathrow

£830

Air Canada

15 Sept

LHR15:05London Heathrow

31h 26m

2 stops

BOI15:31Boise Air Term. Gowen Fld

24 Sept

BOI05:00Boise Air Term. Gowen Fld

22h 00m

2 stops

LHR10:00London Heathrow

£1,018

Scandinavian Airlines flights from United Kingdom to Idaho

Our best Scandinavian Airlines deals on United Kingdom to Idaho flight tickets

Scandinavian Airlines

21 Sept

LHR19:30London Heathrow

34h 04m

2 stops

BOI22:34Boise Air Term. Gowen Fld

6 Oct

BOI10:34Boise Air Term. Gowen Fld

24h 06m

2 stops

LHR17:40London Heathrow

£678

Scandinavian Airlines

14 Sept

LHR18:40London Heathrow

31h 00m

2 stops

BOI18:40Boise Air Term. Gowen Fld

22 Sept

BOI12:17Boise Air Term. Gowen Fld

22h 23m

2 stops

LHR17:40London Heathrow

£794

Scandinavian Airlines

15 Oct

EDI19:10Edinburgh Turnhouse

34h 54m

2 stops

BOI23:04Boise Air Term. Gowen Fld

19 Oct

BOI16:00Boise Air Term. Gowen Fld

19h 25m

2 stops

EDI18:25Edinburgh Turnhouse

£830

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Thu 15/10

17:45-23:55

1 stop14h 10m

Spokane

Wed 28/10

13:38-10:40

1 stop14h 02m

£545

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Thu 15/10

11:45-23:55

2 stops20h 10m

Spokane

Wed 28/10

13:38-10:40

1 stop14h 02m

£592

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Thu 4/3

14:45-18:11

1 stop34h 26m

Boise Air Term. Gowen Fld

Mon 8/3

16:00-12:20

1 stop13h 20m

£672

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Thu 4/3

14:45-22:20

1 stop14h 35m

Boise Air Term. Gowen Fld

Mon 8/3

06:00-12:20

2 stops23h 20m

£696

LondonSpokane

LGW London Gatwick - GEG Spokane

LGWGEG

London Gatwick

Tue 9/3

10:00-21:37

2 stops19h 37m

Spokane

Tue 16/3

07:00-09:00

2 stops19h 00m

£754

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 21/11

07:40-22:51

2 stops22h 11m

Boise Air Term. Gowen Fld

Sat 28/11

12:31-07:55

1 stop12h 24m

£763

LondonSpokane

LCY London City - GEG Spokane

LCYGEG

London City

Tue 9/3

07:45-19:27

2 stops19h 42m

Spokane

Tue 16/3

07:00-08:50

2 stops18h 50m

£774

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 30/9

07:30-23:59

2 stops23h 29m

Boise Air Term. Gowen Fld

Fri 4/12

08:00-07:55

1 stop16h 55m

£775

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 30/9

07:30-23:59

2 stops23h 29m

Boise Air Term. Gowen Fld

Fri 4/12

16:24-13:30

2 stops38h 06m

£775

LondonSpokane

LCY London City - GEG Spokane

LCYGEG

London City

Tue 10/11

09:50-21:11

2 stops19h 21m

Spokane

Tue 24/11

07:00-17:40

2 stops26h 40m

£833

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 United Kingdom 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

Other information

What is the cheapest month to fly to Idaho?

The month of March is, on average, the cheapest month to fly to Idaho from United Kingdom, with most prices found around £646. If you’re not able to fly to Idaho in March, then February is your next best option. Flight prices from United Kingdom to Idaho during February average around £649.

Can stopping save me money on United Kingdom to Idaho flights?

You could potentially save up to 12% on your flight if you consider stops on a United Kingdom to Idaho flight.

Cheap United Kingdom to Idaho flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United Kingdom to Idaho

Best price found	£345
Fastest flight time	14h 18m
Direct flights	None

The best one-way flight to Idaho from United Kingdom in the past 72 hours is £345. The best return flight deal from United Kingdom to Idaho found on momondo in the last 72 hours is £545.

The fastest flight from United Kingdom to Idaho takes 14h 18m

There are no direct flights from United Kingdom to Idaho. There are no popular flight routes from United Kingdom to Idaho.

Search flight deals

Frequently asked questions about flying from the United Kingdom to Idaho

When did momondo last update prices for flights from United Kingdom to Idaho?
Prices for flights from United Kingdom to Idaho are updated daily.
How many operators does momondo search for flights from United Kingdom to Idaho?
There are 6 operators available for flights from United Kingdom to Idaho as of September 2026.
How old do you have to be to fly from United Kingdom 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 United Kingdom to Idaho.
What documentation or ID do you need to fly to Idaho?
The necessary travel and health documents for your Idaho trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from United Kingdom to Idaho

Compare and see reviews for airlines that fly from United Kingdom to Idaho with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom £504	Free Cancellation	Rating 6.8 8,218 reviews	Search Lufthansa flights
United Airlines	PriceFrom £520	Free Cancellation	Rating 7.4 10,208 reviews	Search United Airlines flights
KLM	PriceFrom £650	Free Cancellation	Rating 7.8 1,576 reviews	Search KLM flights
Virgin Atlantic	PriceFrom £668	Free Cancellation	Rating 7.4 694 reviews	Search Virgin Atlantic flights
Icelandair	PriceFrom £697	Free Cancellation	Rating 6.9 741 reviews	Search Icelandair flights
Alaska Airlines	PriceFrom £729	Free Cancellation	Rating 7.9 12,911 reviews	Search Alaska Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from United Kingdom to Idaho?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from United Kingdom to Idaho. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Idaho from United Kingdom which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from United Kingdom 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 United Kingdom to Idaho.

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

Yes. momondo can track prices for United Kingdom 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.