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

Icelandair, Alaska Airlines, and United Airlines are the most popular carriers operating from United Kingdom to Idaho

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 17h 45m on average. Another popular route from United Kingdom to Idaho is flying from Edinburgh to Boise, which will take roughly 35h 20m. Keep in mind that layovers or delays could extend your travel time.

Which airlines fly to Idaho?

United Airlines, Virgin Atlantic and Alaska Airlines 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 35% of people opting to fly with this airline when travelling to Idaho. Keep in mind that there are 5 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 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 5 operators available for flights from United Kingdom to Idaho as of October 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.

£464 Cheap Flights from the United Kingdom to Idaho in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from the United Kingdom to Idaho

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One-way

Last minute

Recent return flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

06:40 - 22:52LHR London Heathrow-BOI Boise Air Term. Gowen Fld

23h 12m2 stops Kastrup Copenhagen Los Angeles

16:10 - 18:30BOI Boise Air Term. Gowen Fld-LHR London Heathrow

19h 20m2 stops Los Angeles Kastrup Copenhagen

£651Scandinavian Airlines

Mon, 9 Nov - Sat, 14 Nov

09:00 - 21:35LHR London Heathrow-BOI Boise Air Term. Gowen Fld

19h 35m2 stops Zurich San Francisco

20:52 - 09:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

30h 48m2 stops San Francisco Denver Intl

£668United Airlines

Tue, 19 Jan - Mon, 15 Mar

11:35 - 11:08LHR London Heathrow-BOI Boise Air Term. Gowen Fld

30h 33m2 stops Denver Intl San Francisco

14:35 - 20:35BOI Boise Air Term. Gowen Fld-LHR London Heathrow

23h 00m2 stops Denver Intl Newark

£689United Airlines

Mon, 7 Dec - Sun, 28 Feb

14:30 - 11:08LHR London Heathrow-BOI Boise Air Term. Gowen Fld

27h 38m2 stops Vancouver Intl San Francisco

12:37 - 05:55BOI Boise Air Term. Gowen Fld-LHR London Heathrow

34h 18m1 stop Chicago O'Hare Intl

£706Multiple Airlines

Mon, 7 Dec - Sun, 28 Feb

14:45 - 18:23LHR London Heathrow-BOI Boise Air Term. Gowen Fld

34h 38m1 stop Seattle/Tacoma Intl

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

13h 20m1 stop Seattle/Tacoma Intl

£722Alaska Airlines

Mon, 7 Dec - Sun, 28 Feb

14:45 - 14:19LHR London Heathrow-BOI Boise Air Term. Gowen Fld

30h 34m1 stop Seattle/Tacoma Intl

14:12 - 12:20BOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 08m1 stop Seattle/Tacoma Intl

£723Alaska Airlines

Fri, 11 Dec - Thu, 24 Dec

06:30 - 18:03LHR London Heathrow-BOI Boise Air Term. Gowen Fld

18h 33m2 stops Frankfurt am Main Denver Intl

08:15 - 11:20BOI Boise Air Term. Gowen Fld-LHR London Heathrow

20h 05m2 stops San Francisco Toronto Pearson Intl

£735Lufthansa

Mon, 23 Nov - Sun, 6 Dec

07:50 - 22:51LHR London Heathrow-BOI Boise Air Term. Gowen Fld

22h 01m1 stop Chicago O'Hare Intl

08:15 - 11:20BOI Boise Air Term. Gowen Fld-LHR London Heathrow

20h 05m2 stops San Francisco Toronto Pearson Intl

£759Lufthansa

Mon, 23 Nov - Sun, 6 Dec

12:20 - 18:38LHR London Heathrow-BOI Boise Air Term. Gowen Fld

13h 18m1 stop Seattle/Tacoma Intl

05:15 - 07:05BOI Boise Air Term. Gowen Fld-LHR London Heathrow

18h 50m1 stop Minneapolis St Paul

£904Virgin Atlantic

Thu, 10 Dec - Thu, 17 Dec

11:45 - 00:10LHR London Heathrow-BOI Boise Air Term. Gowen Fld

19h 25m2 stops Amsterdam Schiphol Minneapolis St Paul

16:44 - 21:25BOI Boise Air Term. Gowen Fld-LHR London Heathrow

21h 41m2 stops Los Angeles Paris Charles de Gaulle

£1,118Virgin Atlantic

Fri, 11 Dec - Fri, 18 Dec

Recent last minute flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

06:40 - 23:04LHR London Heathrow-BOI Boise Air Term. Gowen Fld

23h 24m2 stops Kastrup Copenhagen Los Angeles

16:00 - 21:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

22h 40m2 stops Los Angeles Kastrup Copenhagen

£651Scandinavian Airlines

Wed, 4 Nov - Sun, 8 Nov

07:05 - 23:04LHR London Heathrow-BOI Boise Air Term. Gowen Fld

22h 59m3 stops Oslo Gardermoen Kastrup Copenhagen Los Angeles

16:00 - 21:35BOI Boise Air Term. Gowen Fld-LHR London Heathrow

22h 35m3 stops Los Angeles Kastrup Copenhagen Oslo Gardermoen

£657Scandinavian Airlines

Wed, 4 Nov - Sun, 8 Nov

12:15 - 22:35LHR London Heathrow-BOI Boise Air Term. Gowen Fld

17h 20m2 stops Reykjavik Keflavik Intl Denver Intl

11:15 - 10:50BOI Boise Air Term. Gowen Fld-LHR London Heathrow

16h 35m2 stops Denver Intl Reykjavik Keflavik Intl

£780Multiple Airlines

Wed, 4 Nov - Sun, 8 Nov

14:45 - 23:49LHR London Heathrow-BOI Boise Air Term. Gowen Fld

16h 04m1 stop Seattle/Tacoma Intl

10:49 - 12:20BOI Boise Air Term. Gowen Fld-LHR London Heathrow

18h 31m1 stop Seattle/Tacoma Intl

£792Alaska Airlines

Wed, 4 Nov - Sun, 8 Nov

14:45 - 10:07LHR London Heathrow-BOI Boise Air Term. Gowen Fld

25h 22m1 stop Seattle/Tacoma Intl

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

23h 20m1 stop Seattle/Tacoma Intl

£874Alaska Airlines

Sat, 31 Oct - Sun, 28 Feb

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

14h 35m1 stop Seattle/Tacoma Intl

08:21 - 12:20BOI Boise Air Term. Gowen Fld-LHR London Heathrow

20h 59m2 stops San Francisco Seattle/Tacoma Intl

£897Alaska Airlines

Wed, 4 Nov - Mon, 23 Nov

14:45 - 23:49LHR London Heathrow-BOI Boise Air Term. Gowen Fld

16h 04m1 stop Seattle/Tacoma Intl

08:21 - 12:20BOI Boise Air Term. Gowen Fld-LHR London Heathrow

20h 59m2 stops San Francisco Seattle/Tacoma Intl

£897Alaska Airlines

Mon, 2 Nov - Mon, 23 Nov

20:35 - 23:55LHR London Heathrow-BOI Boise Air Term. Gowen Fld

33h 20m2 stops Reykjavik Keflavik Intl Denver Intl

09:53 - 19:30BOI Boise Air Term. Gowen Fld-LHR London Heathrow

26h 37m2 stops Seattle/Tacoma Intl Reykjavik Keflavik Intl

£987Multiple Airlines

Sat, 31 Oct - Sun, 28 Feb

20:35 - 22:20LHR London Heathrow-BOI Boise Air Term. Gowen Fld

32h 45m2 stops Reykjavik Keflavik Intl Seattle/Tacoma Intl

12:49 - 10:50BOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 01m2 stops Seattle/Tacoma Intl Reykjavik Keflavik Intl

£1,058Icelandair

Wed, 4 Nov - Wed, 18 Nov

11:35 - 21:32LHR London Heathrow-BOI Boise Air Term. Gowen Fld

15h 57m1 stop Denver Intl

08:20 - 05:55BOI Boise Air Term. Gowen Fld-LHR London Heathrow

14h 35m1 stop Chicago O'Hare Intl

£1,191Lufthansa

Fri, 30 Oct - Sun, 28 Feb

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Icelandair flights from United Kingdom to Idaho

Our best Icelandair deals on United Kingdom to Idaho flight tickets

Icelandair

9 Nov

LHR12:15London Heathrow

18h 31m

2 stops

BOI23:46Boise Air Term. Gowen Fld

12 Nov

BOI12:49Boise Air Term. Gowen Fld

23h 41m

2 stops

LHR19:30London Heathrow

£774

Icelandair

5 Nov

LHR12:15London Heathrow

17h 05m

2 stops

BOI22:20Boise Air Term. Gowen Fld

24 Nov

BOI10:52Boise Air Term. Gowen Fld

25h 38m

2 stops

LHR19:30London Heathrow

£986

Icelandair

5 Nov

LHR12:15London Heathrow

17h 05m

2 stops

BOI22:20Boise Air Term. Gowen Fld

22 Nov

BOI10:52Boise Air Term. Gowen Fld

25h 38m

2 stops

LHR19:30London Heathrow

£1,143

Air Canada flights from United Kingdom to Idaho

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

Air Canada

11 Dec

LHR15:00London Heathrow

28h 07m

2 stops

BOI12:07Boise Air Term. Gowen Fld

24 Dec

BOI17:25Boise Air Term. Gowen Fld

34h 55m

2 stops

LHR11:20London Heathrow

£799

Air Canada

2 Nov

LHR13:00London Heathrow

31h 45m

2 stops

BOI13:45Boise Air Term. Gowen Fld

18 Nov

BOI05:00Boise Air Term. Gowen Fld

19h 10m

2 stops

LHR07:10London Heathrow

£1,065

Air Canada

2 Nov

LHR14:30London Heathrow

33h 12m

2 stops

BOI16:42Boise Air Term. Gowen Fld

22 Nov

BOI17:44Boise Air Term. Gowen Fld

31h 46m

2 stops

LHR08:30London Heathrow

£1,066

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 9/11

06:40-22:52

2 stops23h 12m

Boise Air Term. Gowen Fld

Sat 14/11

16:10-18:30

2 stops19h 20m

£651

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Tue 19/1

09:00-21:35

2 stops19h 35m

Boise Air Term. Gowen Fld

Mon 15/3

20:52-09:40

2 stops30h 48m

£668

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 7/12

11:35-11:08

2 stops30h 33m

Boise Air Term. Gowen Fld

Sun 28/2

14:35-20:35

2 stops23h 00m

£689

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 7/12

14:30-11:08

2 stops27h 38m

Boise Air Term. Gowen Fld

Sun 28/2

12:37-05:55

1 stop34h 18m

£706

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 7/12

14:45-18:23

1 stop34h 38m

Boise Air Term. Gowen Fld

Sun 28/2

16:00-12:20

1 stop13h 20m

£722

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 11/12

14:45-14:19

1 stop30h 34m

Boise Air Term. Gowen Fld

Thu 24/12

14:12-12:20

1 stop15h 08m

£723

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 23/11

06:30-18:03

2 stops18h 33m

Boise Air Term. Gowen Fld

Sun 6/12

08:15-11:20

2 stops20h 05m

£735

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 23/11

07:50-22:51

1 stop22h 01m

Boise Air Term. Gowen Fld

Sun 6/12

08:15-11:20

2 stops20h 05m

£759

Fastest return journey

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Thu 10/12

12:20-18:38

1 stop13h 18m

Boise Air Term. Gowen Fld

Thu 17/12

05:15-07:05

1 stop18h 50m

£904

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 11/12

11:45-00:10

2 stops19h 25m

Boise Air Term. Gowen Fld

Fri 18/12

16:44-21:25

2 stops21h 41m

£1,118

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 £655. 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 £657.

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

You could potentially save up to 19% 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	£464
Fastest flight time	14h 29m
Direct flights	None

The best one-way flight to Idaho from United Kingdom in the past 72 hours is £464. The best return flight deal from United Kingdom to Idaho found on momondo in the last 72 hours is £651.

The fastest flight from United Kingdom to Idaho takes 14h 29m

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 5 operators available for flights from United Kingdom to Idaho as of October 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 £511	Free Cancellation	Rating 6.8 8,298 reviews	Search Lufthansa flights
United Airlines	PriceFrom £528	Free Cancellation	Rating 7.3 10,444 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom £722	Free Cancellation	Rating 7.9 13,131 reviews	Search Alaska Airlines flights
Virgin Atlantic	PriceFrom £722	Free Cancellation	Rating 7.5 698 reviews	Search Virgin Atlantic flights
KLM	PriceFrom £967	Free Cancellation	Rating 7.8 1,595 reviews	Search KLM 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.