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 13h 31m 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.

£399 Cheap Flights to Idaho in 2026

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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

United Airlines

5 May

LHR

33h 42m

2 stops

BOI

19 May

BOI

18h 50m

2 stops

LHR

£659

United Airlines

11 Sept

LHR

20h 00m

2 stops

BOI

15 Sept

BOI

18h 50m

2 stops

LHR

£691

United Airlines

11 Sept

LHR

20h 00m

2 stops

BOI

15 Sept

BOI

17h 55m

2 stops

LHR

£692

United Airlines

25 Sept

LHR

19h 52m

2 stops

BOI

29 Sept

BOI

11h 57m

1 stop

LHR

£697

Lufthansa

13 May

LHR

18h 47m

2 stops

BOI

9 Jun

BOI

15h 59m

1 stop

LHR

£700

Lufthansa

1 May

LHR

16h 52m

1 stop

BOI

8 May

BOI

14h 52m

1 stop

LHR

£703

Icelandair

28 Apr

LHR

16h 57m

2 stops

BOI

12 May

BOI

20h 42m

2 stops

LHR

£706

Icelandair

21 Apr

LGW

38h 22m

2 stops

BOI

12 May

BOI

15h 02m

2 stops

LGW

£706

Icelandair

21 Apr

LHR

40h 57m

2 stops

BOI

5 May

BOI

16h 40m

2 stops

LHR

£709

United Airlines

25 Sept

LHR

21h 37m

2 stops

BOI

29 Sept

BOI

11h 58m

1 stop

LHR

£715

United Airlines

6 Sept

LHR

17h 00m

1 stop

BOI

20 Sept

BOI

33h 09m

1 stop

LHR

£716

Icelandair

21 Apr

LGW

38h 22m

2 stops

BOI

5 May

BOI

15h 02m

2 stops

LGW

£718

Flights to Idaho Falls

Search all flight deals to Idaho Falls

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

17h 55m

2 stops

LGW

£793

Multiple Airlines

1 Sept

LHR

16h 51m

2 stops

IDA

25 Sept

IDA

23h 35m

2 stops

LHR

£793

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

17h 55m

2 stops

LGW

£796

Multiple Airlines

1 Sept

LHR

16h 51m

2 stops

IDA

25 Sept

IDA

23h 35m

2 stops

LHR

£797

Multiple Airlines

1 Sept

LHR

32h 31m

2 stops

IDA

25 Sept

IDA

23h 35m

2 stops

LHR

£803

Multiple Airlines

1 Sept

LGW

38h 16m

2 stops

IDA

25 Sept

IDA

17h 55m

2 stops

LGW

£804

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

17h 55m

2 stops

LGW

£805

Multiple Airlines

1 Sept

LHR

16h 51m

2 stops

IDA

25 Sept

IDA

23h 35m

2 stops

LHR

£806

Multiple Airlines

1 Sept

LHR

32h 31m

2 stops

IDA

25 Sept

IDA

22h 37m

2 stops

LHR

£841

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

25h 22m

2 stops

LGW

£841

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

20h 50m

1 stop

LHR

£862

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

20h 50m

1 stop

LHR

£863

Flights to Hailey

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United Airlines

17 Sept

LHR

18h 41m

2 stops

SUN

21 Sept

SUN

15h 40m

2 stops

LHR

£978

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,243

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,244

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,248

Multiple Airlines

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

17h 35m

2 stops

LHR

£1,254

Multiple Airlines

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

17h 35m

2 stops

LHR

£1,255

Multiple Airlines

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

17h 35m

2 stops

LHR

£1,259

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,276

Multiple Airlines

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

17h 35m

2 stops

LHR

£1,288

United Airlines

15 Jul

LHR

17h 58m

1 stop

SUN

3 Aug

SUN

15h 30m

1 stop

LHR

£1,304

United Airlines

15 Jul

LHR

17h 01m

1 stop

SUN

3 Aug

SUN

22h 20m

1 stop

LHR

£1,304

United Airlines

15 Jul

LHR

15h 56m

1 stop

SUN

3 Aug

SUN

19h 10m

1 stop

LHR

£1,308

Find the cheapest flights from the United Kingdom to Idaho

Round-trip

One-way

Last minute

Recent return flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

08:40 - 23:38

LHR

GEG

22h 58m

2 stops

16:00 - 06:55

GEG

LHR

30h 55m

2 stops

£658United Airlines

Wed, 30 Sep - Sun, 4 Oct

08:45 - 11:27

LHR

BOI

33h 42m

2 stops

08:02 - 10:10

BOI

LHR

19h 08m

1 stop

£659United Airlines

Tue, 5 May - Tue, 19 May

08:40 - 23:38

LHR

GEG

22h 58m

2 stops

16:00 - 09:40

GEG

LHR

33h 40m

1 stop

£662United Airlines

Wed, 30 Sep - Sun, 4 Oct

13:05 - 21:31

LHR

GEG

16h 26m

2 stops

14:45 - 20:20

GEG

LHR

21h 35m

2 stops

£674Icelandair

Wed, 22 Apr - Tue, 28 Apr

13:05 - 21:31

LHR

GEG

16h 26m

2 stops

14:45 - 20:20

GEG

LHR

45h 35m

2 stops

£677Icelandair

Wed, 22 Apr - Tue, 28 Apr

09:30 - 21:17

LHR

BOI

18h 47m

2 stops

10:41 - 09:40

BOI

LHR

15h 59m

1 stop

£700Lufthansa

Wed, 13 May - Tue, 9 Jun

11:25 - 21:17

LHR

BOI

16h 52m

1 stop

14:33 - 12:25

BOI

LHR

14h 52m

1 stop

£703Lufthansa

Fri, 1 May - Fri, 8 May

09:20 - 23:00

LCY

BOI

20h 40m

2 stops

13:53 - 16:40

BOI

LCY

19h 47m

2 stops

£876KLM

Tue, 21 Apr - Tue, 12 May

15:00 - 18:17

MAN

IDA

34h 17m

2 stops

11:30 - 20:05

IDA

MAN

25h 35m

2 stops

£945KLM

Thu, 30 Apr - Thu, 7 May

05:55 - 18:14

MAN

IDA

19h 19m

2 stops

15:25 - 16:45

IDA

MAN

18h 20m

2 stops

£1,158Virgin Atlantic

Thu, 4 Jun - Wed, 10 Jun

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 30/9

08:40-23:38

2 stops22h 58m

Spokane

Sun 4/10

16:00-06:55

2 stops30h 55m

£658

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 5/5

08:45-11:27

2 stops33h 42m

Boise Air Term. Gowen Fld

Tue 19/5

08:02-10:10

1 stop19h 08m

£659

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 30/9

08:40-23:38

2 stops22h 58m

Spokane

Sun 4/10

16:00-09:40

1 stop33h 40m

£662

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 22/4

13:05-21:31

2 stops16h 26m

Spokane

Tue 28/4

14:45-20:20

2 stops21h 35m

£674

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 22/4

13:05-21:31

2 stops16h 26m

Spokane

Tue 28/4

14:45-20:20

2 stops45h 35m

£677

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 13/5

09:30-21:17

2 stops18h 47m

Boise Air Term. Gowen Fld

Tue 9/6

10:41-09:40

1 stop15h 59m

£700

Fastest return journey

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 1/5

11:25-21:17

1 stop16h 52m

Boise Air Term. Gowen Fld

Fri 8/5

14:33-12:25

1 stop14h 52m

£703

LondonBoise

LCY - BOI

LCYBOI

London City

Tue 21/4

09:20-23:00

2 stops20h 40m

Boise Air Term. Gowen Fld

Tue 12/5

13:53-16:40

2 stops19h 47m

£876

ManchesterIdaho Falls

MAN - IDA

MANIDA

Manchester

Thu 30/4

15:00-18:17

2 stops34h 17m

Idaho Falls Fanning Field

Thu 7/5

11:30-20:05

2 stops25h 35m

£945

ManchesterIdaho Falls

MAN - IDA

MANIDA

Manchester

Thu 4/6

05:55-18:14

2 stops19h 19m

Idaho Falls Fanning Field

Wed 10/6

15:25-16:45

2 stops18h 20m

£1,158

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 KLM 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 42% of people opting to fly with this airline when travelling to Idaho. Keep in mind that there are 7 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	£399
Best Round-Trip Price	£658
Fastest flight time	17h 23m

The best one-way flight price to Idaho from United Kingdom in the last 72 hours is £399 (London Gatwick to Spokane).

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The best round-trip flight price to Idaho from United Kingdom in the last 72 hours is £658 (London Heathrow to Spokane).

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The fastest flight to Idaho from United Kingdom takes 17h 23m (London City to Jackson Hole).

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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 £402/per person and the cheapest flight to Idaho is £309/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?

76% 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 7 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 44% 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 April 2026, there are 7 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.