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 17h 25m 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.

£378 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

2 Sept

LHR

20h 00m

2 stops

BOI

14 Sept

BOI

33h 09m

1 stop

LHR

£661

Lufthansa

2 Sept

LHR

15h 36m

1 stop

BOI

14 Sept

BOI

11h 56m

1 stop

LHR

£667

Lufthansa

7 Sept

LHR

32h 00m

2 stops

BOI

21 Sept

BOI

13h 07m

1 stop

LHR

£669

Scandinavian Airlines

25 Sept

LHR

20h 38m

2 stops

BOI

11 Oct

BOI

20h 18m

2 stops

LHR

£677

Scandinavian Airlines

29 May

LHR

36h 13m

2 stops

BOI

6 Jun

BOI

38h 05m

2 stops

LHR

£681

United Airlines

1 Sept

LHR

16h 53m

2 stops

BOI

16 Sept

BOI

20h 05m

1 stop

LHR

£685

Air Canada

8 Sept

LHR

31h 05m

2 stops

BOI

23 Sept

BOI

17h 00m

2 stops

LHR

£690

United Airlines

2 Sept

LHR

22h 07m

2 stops

BOI

18 Sept

BOI

20h 10m

1 stop

LHR

£691

United Airlines

1 Sept

LHR

13h 28m

1 stop

BOI

17 Sept

BOI

17h 05m

2 stops

LHR

£692

United Airlines

30 Sept

LHR

23h 22m

2 stops

BOI

10 Oct

BOI

11h 41m

1 stop

LHR

£692

Air Canada

1 Sept

LHR

19h 55m

2 stops

BOI

16 Sept

BOI

17h 00m

2 stops

LHR

£694

Lufthansa

2 Sept

LCY

20h 31m

2 stops

BOI

14 Sept

BOI

20h 11m

2 stops

LCY

£697

Flights to Idaho Falls

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Multiple Airlines

1 Sept

LHR

32h 31m

2 stops

IDA

25 Sept

IDA

23h 35m

2 stops

LHR

£776

Icelandair

1 Sept

LHR

16h 51m

2 stops

IDA

25 Sept

IDA

31h 02m

2 stops

LHR

£804

Icelandair

1 Sept

LHR

32h 31m

2 stops

IDA

25 Sept

IDA

23h 35m

2 stops

LHR

£804

Icelandair

1 Sept

LHR

40h 51m

2 stops

IDA

25 Sept

IDA

23h 35m

2 stops

LHR

£805

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

17h 55m

2 stops

LGW

£816

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

17h 55m

2 stops

LGW

£817

Multiple Airlines

1 Sept

LGW

16h 56m

2 stops

IDA

25 Sept

IDA

25h 22m

2 stops

LGW

£818

Multiple Airlines

1 Sept

LGW

38h 16m

2 stops

IDA

25 Sept

IDA

17h 55m

2 stops

LGW

£830

Alaska Airlines

9 Jun

LHR

29h 37m

1 stop

IDA

16 Jun

IDA

18h 22m

1 stop

LHR

£833

Alaska Airlines

9 Jun

LHR

29h 37m

1 stop

IDA

16 Jun

IDA

18h 22m

1 stop

LHR

£834

Alaska Airlines

9 Jun

LHR

29h 37m

1 stop

IDA

16 Jun

IDA

18h 22m

1 stop

LHR

£835

Alaska Airlines

9 Jun

LHR

29h 37m

1 stop

IDA

16 Jun

IDA

24h 50m

1 stop

LHR

£840

Flights to Hailey

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Delta

15 Jul

LHR

18h 13m

1 stop

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£994

Delta

15 Jul

LHR

18h 13m

1 stop

SUN

3 Aug

SUN

16h 55m

2 stops

LHR

£1,004

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

16h 55m

2 stops

LHR

£1,039

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

16h 55m

2 stops

LHR

£1,070

KLM

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

16h 55m

2 stops

LHR

£1,073

Multiple Airlines

15 Jul

LHR

30h 48m

1 stop

SUN

3 Aug

SUN

20h 25m

1 stop

LHR

£1,164

Delta

15 Jul

LHR

18h 13m

1 stop

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,169

Multiple Airlines

15 Jul

LHR

24h 08m

1 stop

SUN

3 Aug

SUN

20h 25m

1 stop

LHR

£1,191

Virgin Atlantic

5 May

LHR

22h 12m

2 stops

SUN

8 May

SUN

16h 31m

2 stops

LHR

£1,420

Virgin Atlantic

5 May

LHR

22h 12m

2 stops

SUN

8 May

SUN

11h 40m

1 stop

LHR

£1,424

Virgin Atlantic

5 May

LHR

17h 47m

1 stop

SUN

8 May

SUN

14h 21m

1 stop

LHR

£1,443

Multiple Airlines

5 May

LHR

32h 41m

3 stops

SUN

8 May

SUN

41h 40m

3 stops

LHR

£1,633

Find the cheapest flights from the United Kingdom to Idaho

Round-trip

One-way

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Recent return flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

06:55 - 21:04

LHR

GEG

22h 09m

2 stops

12:57 - 11:10

GEG

LHR

14h 13m

1 stop

£643Lufthansa

Wed, 2 Sep - Wed, 9 Sep

08:40 - 10:35

LHR

GEG

33h 55m

2 stops

11:16 - 21:35

GEG

LHR

26h 19m

2 stops

£656United Airlines

Wed, 9 Sep - Sun, 13 Sep

08:40 - 10:35

LHR

GEG

33h 55m

2 stops

11:16 - 21:35

GEG

LHR

26h 19m

2 stops

£658United Airlines

Wed, 9 Sep - Sun, 13 Sep

14:50 - 21:04

LHR

GEG

14h 14m

1 stop

12:57 - 11:10

GEG

LHR

14h 13m

1 stop

£667Lufthansa

Wed, 2 Sep - Wed, 9 Sep

06:40 - 20:18

LHR

BOI

20h 38m

2 stops

12:42 - 16:00

BOI

LHR

20h 18m

2 stops

£677Scandinavian Airlines

Fri, 25 Sep - Sun, 11 Oct

17:00 - 22:13

LHR

BOI

36h 13m

2 stops

12:15 - 09:20

BOI

LHR

38h 05m

2 stops

£681Scandinavian Airlines

Fri, 29 May - Sat, 6 Jun

15:40 - 23:59

LGW

GEG

16h 19m

2 stops

12:30 - 11:45

GEG

LGW

15h 15m

2 stops

£769Icelandair

Wed, 2 Sep - Wed, 9 Sep

13:05 - 22:56

LHR

IDA

16h 51m

2 stops

06:18 - 20:20

IDA

LHR

31h 02m

2 stops

£804Icelandair

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

£836KLM

Mon, 21 Sep - Mon, 12 Oct

10:00 - 20:15

LCY

JAC

17h 15m

2 stops

17:59 - 16:40

JAC

LCY

15h 41m

2 stops

£1,034KLM

Thu, 7 May - Sun, 10 May

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 2/9

06:55-21:04

2 stops22h 09m

Spokane

Wed 9/9

12:57-11:10

1 stop14h 13m

£643

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

£656

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

£658

Fastest return journey

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 2/9

14:50-21:04

1 stop14h 14m

Spokane

Wed 9/9

12:57-11:10

1 stop14h 13m

£667

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 25/9

06:40-20:18

2 stops20h 38m

Boise Air Term. Gowen Fld

Sun 11/10

12:42-16:00

2 stops20h 18m

£677

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 29/5

17:00-22:13

2 stops36h 13m

Boise Air Term. Gowen Fld

Sat 6/6

12:15-09:20

2 stops38h 05m

£681

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Wed 2/9

15:40-23:59

2 stops16h 19m

Spokane

Wed 9/9

12:30-11:45

2 stops15h 15m

£769

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

£804

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

£836

LondonJackson

LCY - JAC

LCYJAC

London City

Thu 7/5

10:00-20:15

2 stops17h 15m

Jackson Hole

Sun 10/5

17:59-16:40

2 stops15h 41m

£1,034

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	£378
Best Round-Trip Price	£643
Fastest flight time	18h 57m

The best one-way flight price to Idaho from United Kingdom in the last 72 hours is £378 (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 £643 (London Heathrow to Spokane).

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The fastest flight to Idaho from United Kingdom takes 18h 57m (London Heathrow 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 £306/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?

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 45% 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.