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 15h 40m 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.

£305 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

£603

Multiple Airlines

14 Apr

LHR

20h 06m

1 stop

BOI

22 Apr

BOI

21h 20m

1 stop

LHR

£618

Lufthansa

20 Apr

LHR

21h 27m

2 stops

BOI

27 Apr

BOI

12h 03m

1 stop

LHR

£625

Lufthansa

20 Apr

LHR

20h 57m

2 stops

BOI

27 Apr

BOI

23h 05m

2 stops

LHR

£630

United Airlines

5 May

LHR

19h 32m

2 stops

BOI

12 May

BOI

22h 55m

1 stop

LHR

£639

United Airlines

20 Apr

LHR

18h 45m

2 stops

BOI

27 Apr

BOI

18h 00m

2 stops

LHR

£640

Lufthansa

20 Apr

LHR

22h 02m

1 stop

BOI

27 Apr

BOI

13h 26m

1 stop

LHR

£648

United Airlines

19 Apr

LHR

37h 10m

2 stops

BOI

26 Apr

BOI

33h 11m

1 stop

LHR

£648

United Airlines

20 Apr

LHR

18h 45m

2 stops

BOI

27 Apr

BOI

15h 36m

2 stops

LHR

£651

United Airlines

3 May

LHR

42h 45m

2 stops

BOI

10 May

BOI

28h 57m

2 stops

LHR

£651

Lufthansa

20 Apr

LHR

19h 12m

2 stops

BOI

27 Apr

BOI

17h 03m

2 stops

LHR

£658

Multiple Airlines

14 Apr

LHR

21h 17m

2 stops

BOI

22 Apr

BOI

25h 35m

2 stops

LHR

£663

Flights to Idaho Falls

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American Airlines

2 Sept

LHR

18h 37m

2 stops

IDA

17 Sept

IDA

21h 45m

2 stops

LHR

£770

Delta

7 Sept

LHR

22h 44m

2 stops

IDA

13 Sept

IDA

32h 10m

1 stop

LHR

£786

Virgin Atlantic

5 May

LHR

36h 30m

2 stops

IDA

12 May

IDA

32h 59m

2 stops

LHR

£789

KLM

3 May

LHR

17h 55m

2 stops

IDA

10 May

IDA

32h 06m

1 stop

LHR

£798

American Airlines

4 Sept

LHR

18h 17m

1 stop

IDA

17 Sept

IDA

13h 35m

1 stop

LHR

£800

Multiple Airlines

5 Sept

LHR

48h 02m

2 stops

IDA

16 Sept

IDA

36h 55m

2 stops

LHR

£803

American Airlines

4 Sept

LHR

20h 07m

2 stops

IDA

15 Sept

IDA

17h 05m

1 stop

LHR

£807

KLM

3 May

LHR

14h 22m

1 stop

IDA

10 May

IDA

32h 06m

1 stop

LHR

£809

Virgin Atlantic

5 Sept

LHR

14h 19m

1 stop

IDA

16 Sept

IDA

21h 25m

2 stops

LHR

£810

Virgin Atlantic

5 May

LHR

18h 45m

1 stop

IDA

12 May

IDA

12h 44m

1 stop

LHR

£815

KLM

1 Sept

LHR

22h 44m

2 stops

IDA

25 Sept

IDA

32h 10m

1 stop

LHR

£816

Virgin Atlantic

2 May

LHR

35h 05m

2 stops

IDA

9 May

IDA

37h 54m

2 stops

LHR

£819

Flights to Hailey

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Delta

6 May

LHR

18h 47m

2 stops

SUN

13 May

SUN

19h 30m

1 stop

LHR

£807

Virgin Atlantic

6 May

LHR

17h 47m

1 stop

SUN

13 May

SUN

14h 21m

1 stop

LHR

£820

Delta

15 Jul

LHR

17h 09m

2 stops

SUN

3 Aug

SUN

13h 40m

1 stop

LHR

£1,185

Multiple Airlines

6 May

LHR

32h 37m

3 stops

SUN

13 May

SUN

22h 01m

3 stops

LHR

£1,193

Delta

15 Jul

LHR

19h 13m

2 stops

SUN

3 Aug

SUN

11h 41m

1 stop

LHR

£1,205

Delta

15 Jul

LHR

22h 24m

2 stops

SUN

3 Aug

SUN

13h 40m

1 stop

LHR

£1,214

Delta

15 Jul

LHR

20h 28m

2 stops

SUN

3 Aug

SUN

17h 35m

2 stops

LHR

£1,217

Delta

15 Jul

LHR

20h 14m

2 stops

SUN

3 Aug

SUN

14h 40m

2 stops

LHR

£1,232

Delta

15 Jul

LHR

22h 24m

2 stops

SUN

3 Aug

SUN

11h 35m

1 stop

LHR

£1,235

Delta

15 Jul

LHR

18h 59m

2 stops

SUN

3 Aug

SUN

14h 40m

2 stops

LHR

£1,262

United Airlines

15 Jul

LHR

15h 51m

1 stop

SUN

3 Aug

SUN

17h 15m

1 stop

LHR

£1,275

United Airlines

15 Jul

LHR

21h 31m

2 stops

SUN

3 Aug

SUN

16h 55m

2 stops

LHR

£1,281

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

£603Multiple Airlines

Tue, 14 Apr - Wed, 22 Apr

08:20 - 21:26

LHR

BOI

20h 06m

1 stop

10:45 - 15:05

BOI

LHR

21h 20m

1 stop

£618Multiple Airlines

Tue, 14 Apr - Wed, 22 Apr

06:55 - 21:11

LHR

GEG

22h 16m

2 stops

12:35 - 11:10

GEG

LHR

14h 35m

1 stop

£621Lufthansa

Wed, 15 Apr - Wed, 22 Apr

06:55 - 21:22

LHR

BOI

21h 27m

2 stops

14:37 - 09:40

BOI

LHR

12h 03m

1 stop

£625Lufthansa

Mon, 20 Apr - Mon, 27 Apr

08:40 - 22:22

LHR

GEG

21h 42m

2 stops

12:57 - 07:25

GEG

LHR

34h 28m

1 stop

£637United Airlines

Wed, 9 Sep - Sun, 13 Sep

08:45 - 21:40

LHR

GEG

20h 55m

2 stops

12:25 - 11:10

GEG

LHR

14h 45m

1 stop

£639United Airlines

Tue, 5 May - Tue, 12 May

17:10 - 22:40

LHR

IDA

36h 30m

2 stops

15:16 - 07:15

IDA

LHR

32h 59m

2 stops

£789Virgin Atlantic

Tue, 5 May - Tue, 12 May

11:45 - 22:40

LHR

IDA

17h 55m

2 stops

18:54 - 10:00

IDA

LHR

32h 06m

1 stop

£798KLM

Sun, 3 May - Sun, 10 May

10:55 - 18:17

LHR

IDA

14h 22m

1 stop

18:54 - 10:00

IDA

LHR

32h 06m

1 stop

£809KLM

Sun, 3 May - Sun, 10 May

10:55 - 18:14

LHR

IDA

14h 19m

1 stop

13:10 - 17:35

IDA

LHR

21h 25m

2 stops

£810Virgin Atlantic

Sat, 5 Sep - Wed, 16 Sep

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 14/4

08:45-23:02

2 stops21h 17m

Boise Air Term. Gowen Fld

Wed 22/4

10:45-10:10

1 stop16h 25m

£603

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 14/4

08:20-21:26

1 stop20h 06m

Boise Air Term. Gowen Fld

Wed 22/4

10:45-15:05

1 stop21h 20m

£618

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 15/4

06:55-21:11

2 stops22h 16m

Spokane

Wed 22/4

12:35-11:10

1 stop14h 35m

£621

Fastest return journey

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 20/4

06:55-21:22

2 stops21h 27m

Boise Air Term. Gowen Fld

Mon 27/4

14:37-09:40

1 stop12h 03m

£625

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 9/9

08:40-22:22

2 stops21h 42m

Spokane

Sun 13/9

12:57-07:25

1 stop34h 28m

£637

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 5/5

08:45-21:40

2 stops20h 55m

Spokane

Tue 12/5

12:25-11:10

1 stop14h 45m

£639

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 5/5

17:10-22:40

2 stops36h 30m

Idaho Falls Fanning Field

Tue 12/5

15:16-07:15

2 stops32h 59m

£789

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 3/5

11:45-22:40

2 stops17h 55m

Idaho Falls Fanning Field

Sun 10/5

18:54-10:00

1 stop32h 06m

£798

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sun 3/5

10:55-18:17

1 stop14h 22m

Idaho Falls Fanning Field

Sun 10/5

18:54-10:00

1 stop32h 06m

£809

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 5/9

10:55-18:14

1 stop14h 19m

Idaho Falls Fanning Field

Wed 16/9

13:10-17:35

2 stops21h 25m

£810

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	£305
Best Round-Trip Price	£603
Fastest flight time	16h 27m

The best one-way flight price to Idaho from United Kingdom in the last 72 hours is £305 (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 £603 (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 £398/per person and the cheapest flight to Idaho is £306/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.