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 45m 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.

£330 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

Multiple Airlines

15 Oct

LHR

19h 14m

2 stops

BOI

27 Oct

BOI

14h 34m

1 stop

LHR

£547

Alaska Airlines

15 Oct

LHR

13h 59m

1 stop

BOI

27 Oct

BOI

16h 14m

1 stop

LHR

£656

Alaska Airlines

30 Oct

LHR

15h 14m

1 stop

BOI

3 Nov

BOI

32h 21m

1 stop

LHR

£686

Alaska Airlines

30 Oct

LHR

15h 14m

1 stop

BOI

3 Nov

BOI

23h 37m

2 stops

LHR

£687

Multiple Airlines

14 Dec

LHR

14h 50m

1 stop

BOI

4 Jan

BOI

12h 24m

1 stop

LHR

£705

Air Canada

30 Oct

LHR

36h 45m

2 stops

BOI

3 Nov

BOI

35h 29m

2 stops

LHR

£721

Alaska Airlines

4 Oct

LHR

26h 35m

1 stop

BOI

11 Oct

BOI

25h 22m

1 stop

LHR

£724

Alaska Airlines

30 Sept

LHR

23h 56m

1 stop

BOI

4 Dec

BOI

16h 20m

1 stop

LHR

£732

Alaska Airlines

1 Oct

LHR

34h 25m

1 stop

BOI

14 Oct

BOI

17h 59m

1 stop

LHR

£734

Alaska Airlines

21 Nov

LHR

16h 14m

1 stop

BOI

28 Nov

BOI

31h 21m

1 stop

LHR

£737

Alaska Airlines

21 Nov

LHR

16h 14m

1 stop

BOI

28 Nov

BOI

31h 21m

1 stop

LHR

£738

Scandinavian Airlines

15 Oct

EDI

34h 54m

2 stops

BOI

19 Oct

BOI

19h 25m

2 stops

EDI

£746

Flights to Idaho Falls

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Alaska Airlines

2 Oct

LHR

29h 20m

1 stop

IDA

9 Oct

IDA

18h 07m

1 stop

LHR

£709

Alaska Airlines

28 Jan

LHR

31h 36m

1 stop

IDA

1 Feb

IDA

15h 24m

1 stop

LHR

£721

Alaska Airlines

28 Jan

LHR

31h 36m

1 stop

IDA

1 Feb

IDA

15h 24m

1 stop

LHR

£722

Alaska Airlines

28 Jan

LHR

31h 36m

1 stop

IDA

1 Feb

IDA

15h 24m

1 stop

LHR

£723

Multiple Airlines

2 Oct

LHR

18h 16m

1 stop

IDA

9 Oct

IDA

18h 37m

1 stop

LHR

£764

Multiple Airlines

2 Oct

LHR

23h 41m

2 stops

IDA

9 Oct

IDA

14h 22m

1 stop

LHR

£779

Alaska Airlines

20 Nov

LHR

15h 12m

1 stop

IDA

28 Nov

IDA

23h 18m

1 stop

LHR

£815

Virgin Atlantic

20 Nov

LHR

32h 57m

2 stops

IDA

28 Nov

IDA

13h 49m

1 stop

LHR

£854

Alaska Airlines

28 Jan

LHR

15h 08m

1 stop

IDA

1 Feb

IDA

37h 22m

2 stops

LHR

£856

Alaska Airlines

28 Jan

LHR

15h 08m

1 stop

IDA

1 Feb

IDA

37h 22m

2 stops

LHR

£857

Alaska Airlines

22 Oct

LHR

29h 20m

1 stop

IDA

29 Oct

IDA

24h 11m

1 stop

LHR

£859

Multiple Airlines

2 Oct

LHR

16h 51m

2 stops

IDA

9 Oct

IDA

38h 57m

2 stops

LHR

£870

Flights to Hailey

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Alaska Airlines

14 Jan

LHR

26h 56m

1 stop

SUN

18 Jan

SUN

17h 57m

1 stop

LHR

£721

Alaska Airlines

14 Jan

LHR

26h 56m

1 stop

SUN

18 Jan

SUN

17h 57m

1 stop

LHR

£722

Alaska Airlines

14 Jan

LHR

26h 56m

1 stop

SUN

18 Jan

SUN

17h 57m

1 stop

LHR

£723

Alaska Airlines

14 Jan

LHR

26h 56m

1 stop

SUN

18 Jan

SUN

33h 43m

1 stop

LHR

£802

Alaska Airlines

14 Jan

LHR

30h 26m

2 stops

SUN

18 Jan

SUN

33h 43m

1 stop

LHR

£968

Alaska Airlines

14 Jan

LHR

30h 26m

2 stops

SUN

18 Jan

SUN

33h 43m

1 stop

LHR

£969

Alaska Airlines

14 Jan

LHR

30h 26m

2 stops

SUN

18 Jan

SUN

33h 43m

1 stop

LHR

£969

United Airlines

14 Jan

LHR

26h 44m

2 stops

SUN

18 Jan

SUN

17h 40m

2 stops

LHR

£991

United Airlines

14 Jan

LHR

18h 11m

2 stops

SUN

18 Jan

SUN

20h 25m

2 stops

LHR

£992

United Airlines

14 Jan

LHR

18h 11m

2 stops

SUN

18 Jan

SUN

20h 25m

2 stops

LHR

£992

United Airlines

14 Jan

LHR

26h 44m

2 stops

SUN

18 Jan

SUN

17h 40m

2 stops

LHR

£993

Find the cheapest flights from the United Kingdom to Idaho

Return

One-way

Last minute

Recent return flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

11:45 - 23:59LHR London Heathrow-BOI Boise Air Term. Gowen Fld

19h 14m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

14:06 - 10:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

14h 34m1 stop Seattle/Tacoma Intl

£547Multiple Airlines

Thu, 15 Oct - Tue, 27 Oct

11:45 - 23:55LHR London Heathrow-GEG Spokane

20h 10m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

13:38 - 10:40GEG Spokane-LHR London Heathrow

14h 02m1 stop Seattle/Tacoma Intl

£548Multiple Airlines

Thu, 15 Oct - Wed, 28 Oct

17:00 - 23:59LHR London Heathrow-BOI Boise Air Term. Gowen Fld

13h 59m1 stop Seattle/Tacoma Intl

14:06 - 12:20BOI Boise Air Term. Gowen Fld-LHR London Heathrow

16h 14m1 stop Seattle/Tacoma Intl

£656Alaska Airlines

Thu, 15 Oct - Tue, 27 Oct

14:45 - 23:59LHR London Heathrow-BOI Boise Air Term. Gowen Fld

15h 14m1 stop Seattle/Tacoma Intl

20:59 - 12:20BOI Boise Air Term. Gowen Fld-LHR London Heathrow

32h 21m1 stop Seattle/Tacoma Intl

£686Alaska Airlines

Fri, 30 Oct - Tue, 3 Nov

09:50 - 21:32LCY London City-BOI Boise Air Term. Gowen Fld

17h 42m2 stops Frankfurt am Main Denver Intl

14:51 - 17:40BOI Boise Air Term. Gowen Fld-LCY London City

19h 49m2 stops Denver Intl Frankfurt am Main

£760Lufthansa

Fri, 30 Oct - Tue, 3 Nov

06:50 - 22:58LHR London Heathrow-BOI Boise Air Term. Gowen Fld

23h 08m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

17:30 - 12:35BOI Boise Air Term. Gowen Fld-LHR London Heathrow

12h 05m1 stop Denver Intl

£761United Airlines

Thu, 1 Oct - Wed, 14 Oct

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

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

12:31 - 07:55BOI Boise Air Term. Gowen Fld-LHR London Heathrow

12h 24m1 stop Chicago O'Hare Intl

£763Lufthansa

Sat, 21 Nov - Sat, 28 Nov

07:30 - 23:59LHR London Heathrow-BOI Boise Air Term. Gowen Fld

23h 29m2 stops Frankfurt am Main San Francisco

16:24 - 13:30BOI Boise Air Term. Gowen Fld-LHR London Heathrow

38h 06m2 stops San Francisco Los Angeles

£775United Airlines

Wed, 30 Sep - Fri, 4 Dec

20:05 - 20:18LCY London City-GEG Spokane

32h 13m2 stops Amsterdam Schiphol Minneapolis St Paul

22:43 - 07:15GEG Spokane-LCY London City

24h 32m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

£848KLM

Sun, 6 Dec - Sun, 27 Dec

20:25 - 22:22LHR London Heathrow-IDA Idaho Falls Fanning Field

32h 57m2 stops Amsterdam Schiphol Salt Lake City

13:11 - 10:00IDA Idaho Falls Fanning Field-LHR London Heathrow

13h 49m1 stop Salt Lake City

£854Virgin Atlantic

Fri, 20 Nov - Sat, 28 Nov

Recent last minute flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

07:00 - 21:14MAN Manchester-GEG Spokane

22h 14m2 stops Munich Franz Josef Strauss Denver Intl

13:09 - 23:15GEG Spokane-MAN Manchester

26h 06m2 stops San Francisco Munich Franz Josef Strauss

£1,045Lufthansa

Mon, 14 Sep - Mon, 21 Sep

10:20 - 22:38LGW London Gatwick-BOI Boise Air Term. Gowen Fld

19h 18m2 stops Frankfurt am Main Seattle/Tacoma Intl

13:15 - 18:50BOI Boise Air Term. Gowen Fld-LGW London Gatwick

22h 35m2 stops Seattle/Tacoma Intl Frankfurt am Main

£1,100Multiple Airlines

Mon, 14 Sep - Mon, 21 Sep

19:15 - 22:27LCY London City-BOI Boise Air Term. Gowen Fld

34h 12m2 stops Madrid Barajas Dallas/Fort Worth

07:02 - 15:15BOI Boise Air Term. Gowen Fld-LCY London City

25h 13m2 stops Dallas/Fort Worth Madrid Barajas

£1,119Iberia

Mon, 14 Sep - Mon, 21 Sep

06:55 - 19:39MAN Manchester-GEG Spokane

20h 44m2 stops London Heathrow Phoenix Sky Harbor Intl

06:30 - 13:10GEG Spokane-MAN Manchester

22h 40m2 stops Phoenix Sky Harbor Intl London Heathrow

£1,123British Airways

Mon, 14 Sep - Mon, 21 Sep

06:55 - 20:40LHR London Heathrow-JAC Jackson Hole

20h 45m2 stops Munich Franz Josef Strauss Denver Intl

13:40 - 09:40JAC Jackson Hole-LHR London Heathrow

13h 00m1 stop Denver Intl

£1,181Lufthansa

Fri, 11 Sep - Sat, 19 Sep

11:25 - 20:40LHR London Heathrow-JAC Jackson Hole

16h 15m1 stop Denver Intl

13:40 - 09:40JAC Jackson Hole-LHR London Heathrow

13h 00m1 stop Denver Intl

£1,190Lufthansa

Fri, 11 Sep - Sat, 19 Sep

11:25 - 20:40LHR London Heathrow-JAC Jackson Hole

16h 15m1 stop Denver Intl

13:40 - 09:40JAC Jackson Hole-LHR London Heathrow

13h 00m1 stop Denver Intl

£1,190Lufthansa

Fri, 11 Sep - Sat, 19 Sep

14:50 - 20:40LHR London Heathrow-JAC Jackson Hole

12h 50m1 stop Denver Intl

13:40 - 11:55JAC Jackson Hole-LHR London Heathrow

15h 15m2 stops Denver Intl Chicago O'Hare Intl

£1,271Lufthansa

Fri, 11 Sep - Sat, 19 Sep

10:20 - 22:38LGW London Gatwick-BOI Boise Air Term. Gowen Fld

19h 18m2 stops Frankfurt am Main Seattle/Tacoma Intl

10:00 - 18:50BOI Boise Air Term. Gowen Fld-LGW London Gatwick

25h 50m2 stops Seattle/Tacoma Intl Frankfurt am Main

£1,516Multiple Airlines

Sun, 13 Sep - Sun, 20 Sep

06:00 - 18:41MAN Manchester-GEG Spokane

20h 41m2 stops Frankfurt am Main San Francisco

05:00 - 10:25GEG Spokane-MAN Manchester

21h 25m3 stops Denver Intl Chicago O'Hare Intl Brussels Bruxelles-National

£1,548United Airlines

Mon, 14 Sep - Mon, 21 Sep

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Thu 15/10

11:45-23:59

2 stops19h 14m

Boise Air Term. Gowen Fld

Tue 27/10

14:06-10:40

1 stop14h 34m

£547

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Thu 15/10

11:45-23:55

2 stops20h 10m

Spokane

Wed 28/10

13:38-10:40

1 stop14h 02m

£548

Fastest return journey

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Thu 15/10

17:00-23:59

1 stop13h 59m

Boise Air Term. Gowen Fld

Tue 27/10

14:06-12:20

1 stop16h 14m

£656

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 30/10

14:45-23:59

1 stop15h 14m

Boise Air Term. Gowen Fld

Tue 3/11

20:59-12:20

1 stop32h 21m

£686

LondonBoise

LCY London City - BOI Boise Air Term. Gowen Fld

LCYBOI

London City

Fri 30/10

09:50-21:32

2 stops17h 42m

Boise Air Term. Gowen Fld

Tue 3/11

14:51-17:40

2 stops19h 49m

£760

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Thu 1/10

06:50-22:58

2 stops23h 08m

Boise Air Term. Gowen Fld

Wed 14/10

17:30-12:35

1 stop12h 05m

£761

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 21/11

07:40-22:51

2 stops22h 11m

Boise Air Term. Gowen Fld

Sat 28/11

12:31-07:55

1 stop12h 24m

£763

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 30/9

07:30-23:59

2 stops23h 29m

Boise Air Term. Gowen Fld

Fri 4/12

16:24-13:30

2 stops38h 06m

£775

LondonSpokane

LCY London City - GEG Spokane

LCYGEG

London City

Sun 6/12

20:05-20:18

2 stops32h 13m

Spokane

Sun 27/12

22:43-07:15

2 stops24h 32m

£848

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Fri 20/11

20:25-22:22

2 stops32h 57m

Idaho Falls Fanning Field

Sat 28/11

13:11-10:00

1 stop13h 49m

£854

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 38% 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	£387
Best Round-Trip Price	£547
Fastest flight time	14h 22m

The best one-way flight price to Idaho from United Kingdom in the last 5 days is £387 (London Gatwick to Spokane).

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The best return flight price to Idaho from United Kingdom in the last 5 days is £547 (London Heathrow to Boise Air Term. Gowen Fld).

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The fastest flight to Idaho from United Kingdom takes 14h 22m (London Heathrow to Spokane).

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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 £392/per person and the cheapest flight to Idaho is £301/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 43% 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.