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 33m 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.

£394 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

30 Sept

LHR

16h 58m

2 stops

BOI

4 Oct

BOI

29h 20m

1 stop

LHR

£684

Scandinavian Airlines

27 May

LHR

34h 28m

2 stops

BOI

3 Jun

BOI

41h 37m

2 stops

LHR

£702

Multiple Airlines

27 May

LHR

19h 18m

1 stop

BOI

3 Jun

BOI

14h 28m

1 stop

LHR

£740

Multiple Airlines

21 May

LHR

35h 03m

2 stops

BOI

4 Jun

BOI

22h 22m

2 stops

LHR

£754

Alaska Airlines

9 Jun

LHR

13h 58m

1 stop

BOI

16 Jun

BOI

13h 52m

1 stop

LHR

£769

Air Canada

30 Sept

LHR

31h 05m

2 stops

BOI

4 Oct

BOI

29h 51m

2 stops

LHR

£776

United Airlines

8 Jun

LHR

21h 10m

2 stops

BOI

15 Jun

BOI

30h 09m

2 stops

LHR

£777

United Airlines

27 May

LHR

21h 15m

2 stops

BOI

3 Jun

BOI

15h 15m

1 stop

LHR

£778

Lufthansa

8 Jun

LHR

13h 45m

1 stop

BOI

15 Jun

BOI

14h 45m

1 stop

LHR

£783

Scandinavian Airlines

7 Aug

LHR

34h 00m

2 stops

BOI

29 Aug

BOI

37h 38m

2 stops

LHR

£784

United Airlines

10 Sept

EDI

29h 05m

2 stops

BOI

14 Sept

BOI

18h 35m

2 stops

EDI

£791

United Airlines

10 Sept

EDI

16h 55m

2 stops

BOI

14 Sept

BOI

31h 21m

2 stops

EDI

£792

Flights to Idaho Falls

Search all flight deals to Idaho Falls

Icelandair

1 Sept

LHR

16h 51m

2 stops

IDA

25 Sept

IDA

31h 02m

2 stops

LHR

£800

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

17h 55m

2 stops

LGW

£811

Multiple Airlines

1 Sept

LHR

16h 51m

2 stops

IDA

25 Sept

IDA

22h 37m

2 stops

LHR

£812

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

17h 55m

2 stops

LGW

£813

Multiple Airlines

8 Jun

LHR

18h 13m

1 stop

IDA

15 Jun

IDA

15h 27m

1 stop

LHR

£825

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

17h 55m

2 stops

LGW

£827

Multiple Airlines

1 Sept

LHR

16h 51m

2 stops

IDA

25 Sept

IDA

22h 37m

2 stops

LHR

£828

Alaska Airlines

9 Jun

LHR

29h 37m

1 stop

IDA

16 Jun

IDA

18h 22m

1 stop

LHR

£828

Alaska Airlines

9 Jun

LHR

29h 37m

1 stop

IDA

16 Jun

IDA

18h 22m

1 stop

LHR

£829

Alaska Airlines

9 Jun

LHR

29h 37m

1 stop

IDA

16 Jun

IDA

24h 50m

1 stop

LHR

£834

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

13h 50m

1 stop

LHR

£841

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

13h 50m

1 stop

LHR

£845

Flights to Hailey

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KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

16h 55m

2 stops

LHR

£1,034

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

16h 55m

2 stops

LHR

£1,051

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,064

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

19h 25m

2 stops

LHR

£1,081

Multiple Airlines

15 Jul

LHR

24h 08m

1 stop

SUN

3 Aug

SUN

13h 25m

1 stop

LHR

£1,157

Multiple Airlines

15 Jul

LHR

24h 08m

1 stop

SUN

3 Aug

SUN

20h 25m

1 stop

LHR

£1,158

Multiple Airlines

15 Jul

LHR

30h 48m

1 stop

SUN

3 Aug

SUN

28h 02m

1 stop

LHR

£1,163

Delta

15 Jul

LHR

18h 13m

1 stop

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,164

United Airlines

11 May

LHR

28h 38m

2 stops

SUN

14 May

SUN

23h 10m

2 stops

LHR

£3,820

Multiple Airlines

15 Jul

LHR

32h 58m

3 stops

SUN

3 Aug

SUN

21h 30m

3 stops

LHR

£3,967

Multiple Airlines

15 Jul

LHR

33h 05m

3 stops

SUN

3 Aug

SUN

21h 30m

3 stops

LHR

£3,990

Multiple Airlines

15 Jul

LHR

32h 58m

3 stops

SUN

3 Aug

SUN

21h 30m

3 stops

LHR

£3,997

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

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08:40 - 10:35

LHR

GEG

33h 55m

2 stops

11:16 - 21:35

GEG

LHR

26h 19m

2 stops

£653United Airlines

Wed, 9 Sep - Sun, 13 Sep

08:40 - 10:35

LHR

GEG

33h 55m

2 stops

11:16 - 06:45

GEG

LHR

35h 29m

1 stop

£654United Airlines

Wed, 9 Sep - Sun, 13 Sep

19:30 - 22:58

LHR

BOI

34h 28m

2 stops

15:23 - 16:00

BOI

LHR

41h 37m

2 stops

£702Scandinavian Airlines

Wed, 27 May - Wed, 3 Jun

14:50 - 21:35

LHR

BOI

13h 45m

1 stop

14:40 - 12:25

BOI

LHR

14h 45m

1 stop

£783Lufthansa

Mon, 8 Jun - Mon, 15 Jun

19:30 - 22:30

LHR

BOI

34h 00m

2 stops

12:42 - 09:20

BOI

LHR

37h 38m

2 stops

£784Scandinavian Airlines

Fri, 7 Aug - Sat, 29 Aug

13:00 - 13:08

LHR

BOI

31h 08m

1 stop

05:00 - 10:00

BOI

LHR

22h 00m

2 stops

£795Lufthansa

Tue, 23 Jun - Sat, 4 Jul

13:05 - 22:56

LHR

IDA

16h 51m

2 stops

06:18 - 20:20

IDA

LHR

31h 02m

2 stops

£800Icelandair

Tue, 1 Sep - Fri, 25 Sep

05:55 - 16:04

MAN

GEG

18h 09m

2 stops

15:05 - 16:45

GEG

MAN

17h 40m

2 stops

£833KLM

Mon, 21 Sep - Mon, 12 Oct

15:40 - 18:14

LGW

BOI

33h 34m

2 stops

20:47 - 14:40

BOI

LGW

34h 53m

2 stops

£888Icelandair

Mon, 8 Jun - Mon, 15 Jun

20:45 - 16:59

LCY

JAC

27h 14m

2 stops

18:06 - 18:30

JAC

LCY

17h 24m

2 stops

£1,373KLM

Sun, 7 Jun - Sun, 14 Jun

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 9/9

08:40-10:35

2 stops33h 55m

Spokane

Sun 13/9

11:16-21:35

2 stops26h 19m

£653

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 9/9

08:40-10:35

2 stops33h 55m

Spokane

Sun 13/9

11:16-06:45

1 stop35h 29m

£654

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 27/5

19:30-22:58

2 stops34h 28m

Boise Air Term. Gowen Fld

Wed 3/6

15:23-16:00

2 stops41h 37m

£702

Fastest return journey

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 8/6

14:50-21:35

1 stop13h 45m

Boise Air Term. Gowen Fld

Mon 15/6

14:40-12:25

1 stop14h 45m

£783

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 7/8

19:30-22:30

2 stops34h 00m

Boise Air Term. Gowen Fld

Sat 29/8

12:42-09:20

2 stops37h 38m

£784

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 23/6

13:00-13:08

1 stop31h 08m

Boise Air Term. Gowen Fld

Sat 4/7

05:00-10:00

2 stops22h 00m

£795

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

13:05-22:56

2 stops16h 51m

Idaho Falls Fanning Field

Fri 25/9

06:18-20:20

2 stops31h 02m

£800

ManchesterSpokane

MAN - GEG

MANGEG

Manchester

Mon 21/9

05:55-16:04

2 stops18h 09m

Spokane

Mon 12/10

15:05-16:45

2 stops17h 40m

£833

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Mon 8/6

15:40-18:14

2 stops33h 34m

Boise Air Term. Gowen Fld

Mon 15/6

20:47-14:40

2 stops34h 53m

£888

LondonJackson

LCY - JAC

LCYJAC

London City

Sun 7/6

20:45-16:59

2 stops27h 14m

Jackson Hole

Sun 14/6

18:06-18:30

2 stops17h 24m

£1,373

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 43% 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	£394
Best Round-Trip Price	£653
Fastest flight time	17h 58m

The best one-way flight price to Idaho from United Kingdom in the last 72 hours is £394 (London Gatwick to Boise Air Term. Gowen Fld).

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The best round-trip flight price to Idaho from United Kingdom in the last 72 hours is £653 (London Heathrow to Spokane).

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The fastest flight to Idaho from United Kingdom takes 17h 58m (London Heathrow 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 £305/per person and the cheapest flight to Idaho is £218/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?

75% 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 47% 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 8 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.