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 55m 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.

£304 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

14 Apr

LHR

21h 17m

2 stops

BOI

22 Apr

BOI

16h 25m

1 stop

LHR

£600

Multiple Airlines

14 Apr

LHR

20h 06m

1 stop

BOI

22 Apr

BOI

21h 20m

1 stop

LHR

£615

Lufthansa

20 Apr

LHR

19h 12m

2 stops

BOI

27 Apr

BOI

13h 26m

1 stop

LHR

£622

Lufthansa

20 Apr

LHR

20h 57m

2 stops

BOI

27 Apr

BOI

23h 05m

2 stops

LHR

£627

United Airlines

5 May

LHR

19h 32m

2 stops

BOI

12 May

BOI

22h 55m

1 stop

LHR

£636

United Airlines

20 Apr

LHR

18h 45m

2 stops

BOI

27 Apr

BOI

21h 55m

1 stop

LHR

£637

Lufthansa

20 Apr

LHR

22h 02m

1 stop

BOI

27 Apr

BOI

13h 26m

1 stop

LHR

£645

United Airlines

19 Apr

LHR

37h 10m

2 stops

BOI

26 Apr

BOI

33h 11m

1 stop

LHR

£646

United Airlines

20 Apr

LHR

18h 45m

2 stops

BOI

27 Apr

BOI

15h 36m

2 stops

LHR

£648

Multiple Airlines

14 Apr

LHR

21h 17m

2 stops

BOI

22 Apr

BOI

25h 35m

2 stops

LHR

£660

United Airlines

4 May

LHR

15h 40m

1 stop

BOI

11 May

BOI

14h 50m

1 stop

LHR

£661

United Airlines

20 Apr

LHR

15h 58m

1 stop

BOI

27 Apr

BOI

12h 03m

1 stop

LHR

£662

Flights to Idaho Falls

Search all flight deals to Idaho Falls

Virgin Atlantic

5 May

LHR

36h 30m

2 stops

IDA

12 May

IDA

32h 59m

2 stops

LHR

£785

Virgin Atlantic

5 May

LHR

36h 30m

2 stops

IDA

12 May

IDA

16h 30m

1 stop

LHR

£795

Virgin Atlantic

5 May

LHR

18h 45m

1 stop

IDA

12 May

IDA

12h 44m

1 stop

LHR

£811

Multiple Airlines

5 May

LGW

16h 40m

2 stops

IDA

12 May

IDA

15h 34m

2 stops

LGW

£819

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

20h 50m

1 stop

LHR

£837

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

20h 50m

1 stop

LHR

£840

Multiple Airlines

1 Sept

LHR

15h 27m

1 stop

IDA

25 Sept

IDA

15h 43m

1 stop

LHR

£846

American Airlines

1 Sept

LHR

27h 55m

1 stop

IDA

25 Sept

IDA

15h 30m

1 stop

LHR

£852

Multiple Airlines

1 Sept

LHR

15h 27m

1 stop

IDA

25 Sept

IDA

15h 43m

1 stop

LHR

£853

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

18h 20m

2 stops

LHR

£855

American Airlines

1 Sept

LHR

28h 25m

1 stop

IDA

25 Sept

IDA

15h 30m

1 stop

LHR

£855

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

18h 20m

2 stops

LHR

£856

Flights to Hailey

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Delta

6 May

LHR

18h 47m

2 stops

SUN

13 May

SUN

19h 30m

1 stop

LHR

£803

Virgin Atlantic

6 May

LHR

17h 47m

1 stop

SUN

13 May

SUN

14h 21m

1 stop

LHR

£816

Air France

19 Apr

LHR

17h 47m

1 stop

SUN

22 Apr

SUN

11h 26m

1 stop

LHR

£1,079

Delta

15 Jul

LHR

17h 23m

2 stops

SUN

3 Aug

SUN

13h 50m

1 stop

LHR

£1,172

Multiple Airlines

6 May

LHR

32h 37m

3 stops

SUN

13 May

SUN

22h 01m

3 stops

LHR

£1,188

Delta

15 Jul

LHR

17h 23m

2 stops

SUN

3 Aug

SUN

17h 35m

2 stops

LHR

£1,191

Delta

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

11h 41m

1 stop

LHR

£1,200

Delta

15 Jul

LHR

20h 28m

2 stops

SUN

3 Aug

SUN

17h 35m

2 stops

LHR

£1,212

Delta

15 Jul

LHR

20h 28m

2 stops

SUN

3 Aug

SUN

17h 35m

2 stops

LHR

£1,219

Delta

15 Jul

LHR

22h 24m

2 stops

SUN

3 Aug

SUN

11h 35m

1 stop

LHR

£1,229

United Airlines

15 Jul

LHR

21h 31m

2 stops

SUN

3 Aug

SUN

16h 55m

2 stops

LHR

£1,275

United Airlines

15 Jul

LHR

17h 58m

1 stop

SUN

3 Aug

SUN

16h 25m

1 stop

LHR

£1,276

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.

08:45 - 23:02

LHR

BOI

21h 17m

2 stops

10:45 - 10:10

BOI

LHR

16h 25m

1 stop

£600Multiple Airlines

mar., 14 abr. - mié., 22 abr.

08:20 - 21:26

LHR

BOI

20h 06m

1 stop

10:45 - 15:05

BOI

LHR

21h 20m

1 stop

£615Multiple Airlines

mar., 14 abr. - mié., 22 abr.

10:50 - 23:02

LHR

BOI

19h 12m

2 stops

12:04 - 08:30

BOI

LHR

13h 26m

1 stop

£622Lufthansa

lun., 20 abr. - lun., 27 abr.

08:30 - 21:11

LHR

GEG

20h 41m

2 stops

12:25 - 11:10

GEG

LHR

14h 45m

1 stop

£624Lufthansa

lun., 27 abr. - lun., 4 may.

08:40 - 22:22

LHR

GEG

21h 42m

2 stops

12:57 - 07:25

GEG

LHR

34h 28m

1 stop

£634United Airlines

mié., 9 sep. - dom., 13 sep.

08:45 - 21:40

LHR

GEG

20h 55m

2 stops

12:25 - 11:10

GEG

LHR

14h 45m

1 stop

£636United Airlines

mar., 5 may. - mar., 12 may.

17:10 - 22:40

LHR

IDA

36h 30m

2 stops

15:16 - 07:15

IDA

LHR

32h 59m

2 stops

£785Virgin Atlantic

mar., 5 may. - mar., 12 may.

17:10 - 22:40

LHR

IDA

36h 30m

2 stops

11:30 - 11:00

IDA

LHR

16h 30m

1 stop

£795Virgin Atlantic

mar., 5 may. - mar., 12 may.

20:45 - 16:13

LCY

JAC

26h 28m

2 stops

17:59 - 16:40

JAC

LCY

15h 41m

2 stops

£985KLM

dom., 3 may. - dom., 10 may.

20:15 - 16:13

LCY

JAC

26h 58m

2 stops

13:21 - 11:40

JAC

LCY

15h 19m

2 stops

£1,234KLM

dom., 12 abr. - vie., 12 jun.

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

mar. 14/4

08:45-23:02

2 stops21h 17m

Boise Air Term. Gowen Fld

mié. 22/4

10:45-10:10

1 stop16h 25m

£600

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

mar. 14/4

08:20-21:26

1 stop20h 06m

Boise Air Term. Gowen Fld

mié. 22/4

10:45-15:05

1 stop21h 20m

£615

Fastest return journey

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

lun. 20/4

10:50-23:02

2 stops19h 12m

Boise Air Term. Gowen Fld

lun. 27/4

12:04-08:30

1 stop13h 26m

£622

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

lun. 27/4

08:30-21:11

2 stops20h 41m

Spokane

lun. 4/5

12:25-11:10

1 stop14h 45m

£624

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

mié. 9/9

08:40-22:22

2 stops21h 42m

Spokane

dom. 13/9

12:57-07:25

1 stop34h 28m

£634

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

mar. 5/5

08:45-21:40

2 stops20h 55m

Spokane

mar. 12/5

12:25-11:10

1 stop14h 45m

£636

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

mar. 5/5

17:10-22:40

2 stops36h 30m

Idaho Falls Fanning Field

mar. 12/5

15:16-07:15

2 stops32h 59m

£785

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

mar. 5/5

17:10-22:40

2 stops36h 30m

Idaho Falls Fanning Field

mar. 12/5

11:30-11:00

1 stop16h 30m

£795

LondonJackson

LCY - JAC

LCYJAC

London City

dom. 3/5

20:45-16:13

2 stops26h 28m

Jackson Hole

dom. 10/5

17:59-16:40

2 stops15h 41m

£985

LondonJackson

LCY - JAC

LCYJAC

London City

dom. 12/4

20:15-16:13

2 stops26h 58m

Jackson Hole

vie. 12/6

13:21-11:40

2 stops15h 19m

£1,234

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	£304
Best Round-Trip Price	£600
Fastest flight time	16h 27m

The best one-way flight price to Idaho from United Kingdom in the last 72 hours is £304 (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 £600 (London Heathrow to Boise Air Term. Gowen Fld).

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The fastest flight to Idaho from United Kingdom takes 16h 27m (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 £396/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?

77% 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 March 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.