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 20h 16m 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.

£342 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

Scandinavian Airlines

10 Sept

LHR

36h 34m

2 stops

BOI

14 Sept

BOI

41h 00m

2 stops

LHR

£589

Scandinavian Airlines

10 Sept

LHR

36h 34m

2 stops

BOI

14 Sept

BOI

41h 00m

2 stops

LHR

£590

Scandinavian Airlines

10 Sept

LHR

36h 34m

2 stops

BOI

14 Sept

BOI

41h 00m

2 stops

LHR

£591

Scandinavian Airlines

18 Sept

LHR

34h 04m

2 stops

BOI

25 Sept

BOI

41h 00m

2 stops

LHR

£601

Scandinavian Airlines

18 Sept

LHR

28h 35m

3 stops

BOI

25 Sept

BOI

23h 16m

3 stops

LHR

£627

United Airlines

16 Sept

LHR

27h 56m

2 stops

BOI

23 Sept

BOI

11h 55m

1 stop

LHR

£632

United Airlines

10 Sept

LHR

18h 54m

2 stops

BOI

14 Sept

BOI

16h 09m

1 stop

LHR

£687

United Airlines

10 Sept

LHR

18h 54m

2 stops

BOI

14 Sept

BOI

16h 09m

1 stop

LHR

£688

United Airlines

16 Sept

LHR

13h 47m

1 stop

BOI

23 Sept

BOI

16h 10m

1 stop

LHR

£689

Scandinavian Airlines

10 Sept

BHX

34h 19m

2 stops

BOI

14 Sept

BOI

19h 35m

2 stops

BHX

£692

Scandinavian Airlines

10 Sept

LHR

32h 40m

2 stops

BOI

14 Sept

BOI

19h 30m

2 stops

LHR

£693

Scandinavian Airlines

10 Sept

BHX

34h 19m

2 stops

BOI

14 Sept

BOI

19h 35m

2 stops

BHX

£693

Flights to Idaho Falls

Search all flight deals to Idaho Falls

Alaska Airlines

14 Sept

LHR

29h 20m

1 stop

IDA

28 Sept

IDA

18h 04m

1 stop

LHR

£748

Finnair

1 Sept

LHR

18h 15m

1 stop

IDA

25 Sept

IDA

20h 15m

2 stops

LHR

£775

Finnair

1 Sept

LHR

19h 05m

2 stops

IDA

25 Sept

IDA

20h 15m

2 stops

LHR

£785

Finnair

1 Sept

LHR

18h 15m

1 stop

IDA

25 Sept

IDA

20h 15m

2 stops

LHR

£786

Finnair

1 Sept

LHR

19h 05m

2 stops

IDA

25 Sept

IDA

20h 15m

2 stops

LHR

£788

Alaska Airlines

3 Dec

LHR

14h 54m

1 stop

IDA

7 Dec

IDA

23h 05m

1 stop

LHR

£790

Alaska Airlines

3 Dec

LHR

14h 54m

1 stop

IDA

7 Dec

IDA

23h 05m

1 stop

LHR

£791

Virgin Atlantic

14 Sept

LHR

31h 32m

2 stops

IDA

28 Sept

IDA

13h 55m

1 stop

LHR

£792

Multiple Airlines

14 Sept

LHR

23h 07m

2 stops

IDA

28 Sept

IDA

13h 55m

1 stop

LHR

£793

Finnair

10 Oct

LHR

19h 47m

1 stop

IDA

18 Oct

IDA

33h 36m

2 stops

LHR

£794

Multiple Airlines

14 Sept

LHR

23h 07m

2 stops

IDA

28 Sept

IDA

17h 10m

2 stops

LHR

£796

KLM

1 Sept

LHR

14h 25m

1 stop

IDA

25 Sept

IDA

13h 55m

1 stop

LHR

£799

Flights to Hailey

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United Airlines

24 Sept

LHR

38h 02m

2 stops

SUN

28 Sept

SUN

12h 02m

1 stop

LHR

£913

United Airlines

24 Sept

LHR

38h 42m

2 stops

SUN

28 Sept

SUN

16h 55m

2 stops

LHR

£914

United Airlines

24 Sept

LHR

38h 42m

2 stops

SUN

28 Sept

SUN

16h 55m

2 stops

LHR

£916

United Airlines

24 Sept

LHR

38h 02m

2 stops

SUN

28 Sept

SUN

12h 02m

1 stop

LHR

£917

Alaska Airlines

24 Sept

LHR

23h 46m

1 stop

SUN

28 Sept

SUN

21h 37m

1 stop

LHR

£935

Alaska Airlines

24 Sept

LHR

23h 46m

1 stop

SUN

28 Sept

SUN

21h 37m

1 stop

LHR

£946

Alaska Airlines

24 Sept

LHR

23h 46m

1 stop

SUN

28 Sept

SUN

21h 37m

1 stop

LHR

£949

Alaska Airlines

24 Sept

LHR

23h 46m

1 stop

SUN

28 Sept

SUN

21h 37m

1 stop

LHR

£967

United Airlines

3 Dec

LHR

33h 09m

1 stop

SUN

7 Dec

SUN

14h 35m

1 stop

LHR

£973

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.

06:40 - 17:09

LHR

GEG

18h 29m

2 stops

13:00 - 17:40

GEG

LHR

20h 40m

2 stops

£579Scandinavian Airlines

Tue, 8 Sep - Tue, 6 Oct

06:40 - 17:09

LHR

GEG

18h 29m

2 stops

11:18 - 17:40

GEG

LHR

22h 22m

2 stops

£580Scandinavian Airlines

Tue, 8 Sep - Tue, 6 Oct

14:10 - 11:06

LHR

BOI

27h 56m

2 stops

17:40 - 12:35

BOI

LHR

11h 55m

1 stop

£632United Airlines

Wed, 16 Sep - Wed, 23 Sep

07:25 - 19:16

LHR

GEG

19h 51m

2 stops

13:38 - 12:25

GEG

LHR

14h 47m

1 stop

£657United Airlines

Tue, 8 Sep - Tue, 6 Oct

11:25 - 20:49

LHR

GEG

17h 24m

1 stop

13:05 - 11:10

GEG

LHR

14h 05m

1 stop

£675Lufthansa

Tue, 29 Sep - Tue, 6 Oct

15:40 - 23:11

LGW

GEG

39h 31m

2 stops

16:38 - 14:40

GEG

LGW

38h 02m

2 stops

£715Icelandair

Tue, 8 Sep - Tue, 6 Oct

13:00 - 23:59

LGW

GEG

18h 59m

2 stops

16:38 - 14:40

GEG

LGW

38h 02m

2 stops

£729Icelandair

Tue, 8 Sep - Tue, 6 Oct

10:35 - 22:54

LGW

GEG

20h 19m

2 stops

15:30 - 16:00

GEG

LGW

16h 30m

2 stops

£732Virgin Atlantic

Tue, 8 Sep - Tue, 6 Oct

20:15 - 22:54

LCY

GEG

34h 39m

2 stops

15:30 - 16:40

GEG

LCY

17h 10m

2 stops

£746Virgin Atlantic

Tue, 8 Sep - Tue, 6 Oct

09:50 - 21:09

LCY

GEG

19h 19m

2 stops

06:20 - 17:40

GEG

LCY

27h 20m

2 stops

£1,014Lufthansa

Mon, 28 Dec - Mon, 4 Jan

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 8/9

06:40-17:09

2 stops18h 29m

Spokane

Tue 6/10

13:00-17:40

2 stops20h 40m

£579

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 8/9

06:40-17:09

2 stops18h 29m

Spokane

Tue 6/10

11:18-17:40

2 stops22h 22m

£580

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 16/9

14:10-11:06

2 stops27h 56m

Boise Air Term. Gowen Fld

Wed 23/9

17:40-12:35

1 stop11h 55m

£632

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 8/9

07:25-19:16

2 stops19h 51m

Spokane

Tue 6/10

13:38-12:25

1 stop14h 47m

£657

Fastest return journey

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 29/9

11:25-20:49

1 stop17h 24m

Spokane

Tue 6/10

13:05-11:10

1 stop14h 05m

£675

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Tue 8/9

15:40-23:11

2 stops39h 31m

Spokane

Tue 6/10

16:38-14:40

2 stops38h 02m

£715

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Tue 8/9

13:00-23:59

2 stops18h 59m

Spokane

Tue 6/10

16:38-14:40

2 stops38h 02m

£729

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Tue 8/9

10:35-22:54

2 stops20h 19m

Spokane

Tue 6/10

15:30-16:00

2 stops16h 30m

£732

LondonSpokane

LCY - GEG

LCYGEG

London City

Tue 8/9

20:15-22:54

2 stops34h 39m

Spokane

Tue 6/10

15:30-16:40

2 stops17h 10m

£746

LondonSpokane

LCY - GEG

LCYGEG

London City

Mon 28/12

09:50-21:09

2 stops19h 19m

Spokane

Mon 4/1

06:20-17:40

2 stops27h 20m

£1,014

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 41% 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	£342
Best Round-Trip Price	£579
Fastest flight time	21h 56m

The best one-way flight price to Idaho from United Kingdom in the last 5 days is £342 (London Gatwick to Spokane).

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The best return flight price to Idaho from United Kingdom in the last 5 days is £579 (London Heathrow to Spokane).

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The fastest flight to Idaho from United Kingdom takes 21h 56m (London City 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 £395/per person and the cheapest flight to Idaho is £304/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?

81% 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 July 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.