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 Heathrow and flying into Boise Air Term. Gowen Fld (one of the most popular routes), then the duration is 16h 14m on average. Another popular route from United Kingdom to Idaho is flying from Manchester to Boise Air Term. Gowen Fld, which will take roughly . Keep in mind that layovers or delays could extend your travel time.

£405 Cheap Flights to Idaho in 2026/27

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Recent flights found to popular cities in Idaho

Find flights to these popular cities in Idaho from your nearest airport.

Flights to Boise

Search all flight deals to Boise

Multiple Airlines

3 Nov

LHR

22h 03m

2 stops

BOI

13 Nov

BOI

20h 17m

2 stops

LHR

£628

Alaska Airlines

20 Oct

LHR

13h 59m

1 stop

BOI

31 Oct

BOI

23h 37m

1 stop

LHR

£632

Multiple Airlines

28 Oct

LHR

18h 02m

1 stop

BOI

4 Nov

BOI

15h 55m

1 stop

LHR

£643

Multiple Airlines

28 Oct

LHR

25h 30m

2 stops

BOI

4 Nov

BOI

15h 55m

1 stop

LHR

£647

Multiple Airlines

15 Oct

LHR

19h 14m

2 stops

BOI

22 Oct

BOI

14h 31m

1 stop

LHR

£655

Multiple Airlines

29 Oct

LHR

17h 39m

1 stop

BOI

11 Nov

BOI

16h 51m

1 stop

LHR

£672

Multiple Airlines

2 Nov

LHR

22h 13m

2 stops

BOI

9 Nov

BOI

17h 42m

1 stop

LHR

£674

Air Canada

28 Oct

LHR

26h 49m

2 stops

BOI

9 Nov

BOI

16h 50m

2 stops

LHR

£675

Multiple Airlines

28 Oct

LHR

26h 49m

2 stops

BOI

9 Nov

BOI

11h 49m

1 stop

LHR

£678

Multiple Airlines

2 Nov

LHR

16h 43m

1 stop

BOI

9 Nov

BOI

17h 42m

1 stop

LHR

£683

United Airlines

28 Oct

LHR

21h 53m

2 stops

BOI

4 Nov

BOI

20h 10m

1 stop

LHR

£685

Air Canada

28 Oct

LHR

34h 51m

2 stops

BOI

4 Nov

BOI

23h 20m

2 stops

LHR

£686

Flights to Idaho Falls

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Multiple Airlines

22 Oct

LHR

23h 29m

2 stops

IDA

31 Oct

IDA

47h 41m

2 stops

LHR

£713

Alaska Airlines

28 Jan

LHR

31h 36m

1 stop

IDA

1 Feb

IDA

15h 24m

1 stop

LHR

£805

Alaska Airlines

28 Jan

LHR

31h 36m

1 stop

IDA

1 Feb

IDA

15h 24m

1 stop

LHR

£806

Alaska Airlines

28 Jan

LHR

31h 36m

1 stop

IDA

1 Feb

IDA

15h 24m

1 stop

LHR

£807

Alaska Airlines

22 Oct

LHR

29h 20m

1 stop

IDA

31 Oct

IDA

16h 22m

1 stop

LHR

£817

Finnair

5 Oct

LHR

36h 17m

1 stop

IDA

11 Oct

IDA

33h 36m

2 stops

LHR

£818

Alaska Airlines

28 Jan

LHR

31h 36m

1 stop

IDA

1 Feb

IDA

15h 24m

1 stop

LHR

£843

Finnair

5 Oct

LHR

35h 47m

2 stops

IDA

11 Oct

IDA

33h 36m

2 stops

LHR

£846

Alaska Airlines

18 Oct

LHR

29h 20m

1 stop

IDA

25 Oct

IDA

24h 11m

1 stop

LHR

£864

Alaska Airlines

28 Jan

LHR

15h 08m

1 stop

IDA

1 Feb

IDA

37h 22m

2 stops

LHR

£874

Alaska Airlines

28 Jan

LHR

15h 08m

1 stop

IDA

1 Feb

IDA

37h 22m

2 stops

LHR

£875

Alaska Airlines

28 Jan

LHR

15h 08m

1 stop

IDA

1 Feb

IDA

37h 22m

2 stops

LHR

£876

Flights to Hailey

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Multiple Airlines

2 Feb

LHR

35h 10m

1 stop

SUN

9 Mar

SUN

11h 35m

1 stop

LHR

£763

Multiple Airlines

2 Feb

LHR

35h 10m

1 stop

SUN

9 Mar

SUN

31h 55m

2 stops

LHR

£767

Multiple Airlines

2 Feb

LHR

25h 29m

2 stops

SUN

9 Mar

SUN

31h 55m

2 stops

LHR

£799

Alaska Airlines

14 Jan

LHR

26h 56m

1 stop

SUN

18 Jan

SUN

33h 43m

1 stop

LHR

£874

Alaska Airlines

14 Jan

LHR

26h 56m

1 stop

SUN

18 Jan

SUN

33h 43m

1 stop

LHR

£888

Alaska Airlines

14 Jan

LHR

26h 56m

1 stop

SUN

18 Jan

SUN

33h 43m

1 stop

LHR

£890

Alaska Airlines

14 Jan

LHR

26h 56m

1 stop

SUN

18 Jan

SUN

33h 43m

1 stop

LHR

£890

United Airlines

14 Jan

LHR

52h 11m

2 stops

SUN

18 Jan

SUN

16h 20m

1 stop

LHR

£925

United Airlines

14 Jan

LHR

52h 11m

2 stops

SUN

18 Jan

SUN

34h 15m

1 stop

LHR

£926

United Airlines

14 Jan

LHR

52h 11m

2 stops

SUN

18 Jan

SUN

17h 55m

2 stops

LHR

£926

United Airlines

14 Jan

LHR

52h 11m

2 stops

SUN

18 Jan

SUN

19h 40m

1 stop

LHR

£927

United Airlines

14 Jan

LHR

32h 39m

2 stops

SUN

18 Jan

SUN

35h 50m

2 stops

LHR

£971

Find the cheapest flights from the United Kingdom to Idaho

Return

One-way

Recent return flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

13:05 - 21:25LHR London Heathrow-GEG Spokane

16h 20m2 stops Reykjavik Keflavik Intl Seattle/Tacoma Intl

07:20 - 11:50GEG Spokane-LHR London Heathrow

20h 30m2 stops Seattle/Tacoma Intl Reykjavik Keflavik Intl

£616Multiple Airlines

Tue, 20 Oct - Sat, 24 Oct

10:55 - 22:57LHR London Heathrow-BOI Boise Air Term. Gowen Fld

18h 02m1 stop Los Angeles Los Angeles

17:35 - 16:30BOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 55m1 stop Los Angeles Los Angeles

£643Multiple Airlines

Wed, 28 Oct - Wed, 4 Nov

11:35 - 10:38LHR London Heathrow-GEG Spokane

31h 03m2 stops Denver Intl San Francisco

11:22 - 12:00GEG Spokane-LHR London Heathrow

16h 38m1 stop Chicago O'Hare Intl

£685United Airlines

Mon, 2 Nov - Mon, 9 Nov

11:35 - 10:38LHR London Heathrow-GEG Spokane

31h 03m2 stops Denver Intl San Francisco

11:22 - 10:50GEG Spokane-LHR London Heathrow

15h 28m2 stops Chicago O'Hare Intl Washington, D.C. Dulles Intl

£685United Airlines

Mon, 2 Nov - Mon, 9 Nov

17:00 - 15:23LHR London Heathrow-BOI Boise Air Term. Gowen Fld

29h 23m1 stop Seattle/Tacoma Intl

18:04 - 15:05BOI Boise Air Term. Gowen Fld-LHR London Heathrow

14h 01m1 stop Seattle/Tacoma Intl

£698Alaska Airlines

Mon, 5 Oct - Fri, 9 Oct

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

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

14:48 - 09:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

11h 52m1 stop Denver Intl

£714Lufthansa

Tue, 24 Nov - Tue, 15 Dec

14:45 - 12:35LHR London Heathrow-BOI Boise Air Term. Gowen Fld

27h 50m1 stop Seattle/Tacoma Intl

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

21h 00m1 stop Seattle/Tacoma Intl

£718Alaska Airlines

Wed, 28 Oct - Wed, 4 Nov

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

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

14:48 - 12:50BOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 02m2 stops Denver Intl Frankfurt am Main

£734Lufthansa

Tue, 24 Nov - Tue, 15 Dec

12:20 - 18:45LHR London Heathrow-GEG Spokane

13h 25m1 stop Seattle/Tacoma Intl

11:00 - 10:40GEG Spokane-LHR London Heathrow

15h 40m1 stop Seattle/Tacoma Intl

£781Virgin Atlantic

Thu, 29 Oct - Wed, 11 Nov

11:20 - 21:54LHR London Heathrow-GEG Spokane

18h 34m2 stops New York John F Kennedy Intl Salt Lake City

13:25 - 13:05GEG Spokane-LHR London Heathrow

15h 40m2 stops Salt Lake City Minneapolis St Paul

£825Virgin Atlantic

Sat, 3 Oct - Sat, 10 Oct

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Tue 20/10

13:05-21:25

2 stops16h 20m

Spokane

Sat 24/10

07:20-11:50

2 stops20h 30m

£616

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 28/10

10:55-22:57

1 stop18h 02m

Boise Air Term. Gowen Fld

Wed 4/11

17:35-16:30

1 stop15h 55m

£643

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 2/11

11:35-10:38

2 stops31h 03m

Spokane

Mon 9/11

11:22-12:00

1 stop16h 38m

£685

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 2/11

11:35-10:38

2 stops31h 03m

Spokane

Mon 9/11

11:22-10:50

2 stops15h 28m

£685

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 5/10

17:00-15:23

1 stop29h 23m

Boise Air Term. Gowen Fld

Fri 9/10

18:04-15:05

1 stop14h 01m

£698

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Tue 24/11

07:40-22:51

2 stops22h 11m

Boise Air Term. Gowen Fld

Tue 15/12

14:48-09:40

1 stop11h 52m

£714

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 28/10

14:45-12:35

1 stop27h 50m

Boise Air Term. Gowen Fld

Wed 4/11

08:20-12:20

1 stop21h 00m

£718

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Tue 24/11

07:40-22:51

2 stops22h 11m

Boise Air Term. Gowen Fld

Tue 15/12

14:48-12:50

2 stops15h 02m

£734

Fastest return journey

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Thu 29/10

12:20-18:45

1 stop13h 25m

Spokane

Wed 11/11

11:00-10:40

1 stop15h 40m

£781

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Sat 3/10

11:20-21:54

2 stops18h 34m

Spokane

Sat 10/10

13:25-13:05

2 stops15h 40m

£825

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

Idaho flights insights and trends

Explore insights for your Idaho flight to craft the best travel plan

Airlines

Other information

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 37% 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.

Cheapest flights to cities in Idaho

Click on the cities below to find out when it's cheapest to fly to Idaho from United Kingdom

Boise

Find flights to Boise

Cheap Idaho flight deals and tips

Summary info about Idaho flight prices, duration and airlines

Best One-Way Price	£405
Best Round-Trip Price	£616
Fastest flight time	18h 42m

The best one-way flight price to Idaho from United Kingdom in the last 5 days is £405 (London Gatwick to Spokane).

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The best return flight price to Idaho from United Kingdom in the last 5 days is £616 (London Heathrow to Spokane).

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The fastest flight to Idaho from United Kingdom takes 18h 42m (London City to Boise Air Term. Gowen Fld).

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Frequently asked questions about flying to Idaho

What is the cheapest flight I can find to Idaho?

The average flight to Idaho costs £396/per person and the cheapest flight to Idaho is £305/per person. This price varies based on a multitude of factors such as departure airport, airline, time of booking and when you plan on travelling.

What is the best airport to fly into to visit Boise?

85% of momondo users visit Boise more often than any other city in Idaho. When travelling to Boise, typically the most convenient airport to fly into is Boise Airport.

What is the weather like in Idaho?

Temperatures in Idaho can vary between -1 °C and 24 °C based on the time of year. Typically, the coldest month in Idaho will be December, and the warmest month will be July. It is also worth noting that those looking to avoid rain and/or snow should consider travelling to Idaho in August, July, and September, as that is when precipitation is least likely.

Which airlines fly to Idaho?

Of the 6 airlines that fly to Idaho, United Airlines, Virgin Atlantic and Lufthansa happen to be the most favoured based on our user data. United Airlines is the most popular among the three airlines, with 42% of users choosing them for their travels to Idaho.

When did momondo last update prices for flights to Idaho?

Prices for flights to Idaho were last updated today.

How many operators does momondo search for flights to Idaho?

As of September 2026, there are 6 operators available to choose from for flights to Idaho.

How old do you have to be to fly 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 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.

Why use momondo?

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

Finding the right flight to Idaho is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. These options can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Idaho quick and easy, saving you time and money.

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

Yes. All flights to Idaho on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights 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 to Idaho.

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

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