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 16h 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.

£356 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

21 Apr

BOI

19h 30m

2 stops

LHR

£493

Multiple Airlines

14 Apr

LHR

21h 42m

1 stop

BOI

21 Apr

BOI

22h 05m

2 stops

LHR

£509

Multiple Airlines

14 Apr

LHR

21h 42m

1 stop

BOI

21 Apr

BOI

24h 18m

1 stop

LHR

£529

United Airlines

20 Apr

LHR

19h 28m

2 stops

BOI

27 Apr

BOI

16h 40m

2 stops

LHR

£570

United Airlines

20 Apr

LHR

19h 28m

2 stops

BOI

27 Apr

BOI

24h 20m

1 stop

LHR

£571

United Airlines

13 Apr

LHR

18h 52m

2 stops

BOI

20 Apr

BOI

18h 25m

2 stops

LHR

£572

Lufthansa

13 Apr

LHR

13h 32m

1 stop

BOI

20 Apr

BOI

16h 05m

1 stop

LHR

£575

United Airlines

27 Apr

LHR

22h 37m

2 stops

BOI

3 May

BOI

32h 05m

1 stop

LHR

£578

United Airlines

27 Apr

LHR

19h 23m

2 stops

BOI

3 May

BOI

33h 12m

1 stop

LHR

£581

Multiple Airlines

27 Apr

LHR

18h 10m

1 stop

BOI

3 May

BOI

35h 37m

1 stop

LHR

£590

United Airlines

20 Apr

LHR

17h 42m

1 stop

BOI

27 Apr

BOI

11h 51m

1 stop

LHR

£593

United Airlines

20 Apr

LHR

13h 40m

1 stop

BOI

27 Apr

BOI

14h 43m

1 stop

LHR

£594

Flights to Idaho Falls

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American Airlines

3 Jun

LHR

14h 50m

1 stop

IDA

17 Jun

IDA

20h 15m

2 stops

LHR

£782

American Airlines

3 Jun

LHR

24h 28m

2 stops

IDA

14 Jun

IDA

20h 30m

2 stops

LHR

£812

Virgin Atlantic

31 Mar

LHR

18h 21m

1 stop

IDA

7 Apr

IDA

14h 50m

1 stop

LHR

£831

United Airlines

14 Apr

LHR

20h 34m

2 stops

IDA

21 Apr

IDA

12h 00m

1 stop

LHR

£832

Virgin Atlantic

31 Mar

LHR

30h 20m

2 stops

IDA

7 Apr

IDA

16h 00m

2 stops

LHR

£838

American Airlines

3 Jun

LHR

14h 50m

1 stop

IDA

17 Jun

IDA

20h 55m

1 stop

LHR

£839

American Airlines

4 Jun

LHR

24h 28m

2 stops

IDA

14 Jun

IDA

20h 30m

2 stops

LHR

£842

American Airlines

3 Jun

LHR

19h 30m

2 stops

IDA

16 Jun

IDA

15h 26m

2 stops

LHR

£846

United Airlines

14 Apr

LHR

13h 14m

1 stop

IDA

21 Apr

IDA

12h 10m

1 stop

LHR

£856

Delta

3 Jun

LHR

24h 02m

2 stops

IDA

15 Jun

IDA

21h 15m

2 stops

LHR

£869

Virgin Atlantic

5 Jun

LHR

20h 22m

2 stops

IDA

15 Jun

IDA

17h 31m

2 stops

LHR

£882

American Airlines

7 Jun

LHR

19h 05m

2 stops

IDA

13 Jun

IDA

13h 47m

1 stop

LHR

£899

Flights to Hailey

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Virgin Atlantic

1 Apr

LHR

17h 55m

1 stop

SUN

10 Apr

SUN

21h 50m

2 stops

LHR

£1,625

Multiple Airlines

1 Apr

LHR

28h 39m

1 stop

SUN

10 Apr

SUN

18h 45m

1 stop

LHR

£2,761

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.

08:00 - 18:36

LHR

GEG

18h 36m

1 stop

07:10 - 09:00

GEG

LHR

17h 50m

1 stop

£463United Airlines

Fri, 1 May - Tue, 5 May

08:45 - 23:02

LHR

BOI

21h 17m

2 stops

07:40 - 10:10

BOI

LHR

19h 30m

2 stops

£493Multiple Airlines

Tue, 14 Apr - Tue, 21 Apr

06:55 - 21:11

LHR

GEG

22h 16m

2 stops

12:35 - 11:10

GEG

LHR

14h 35m

1 stop

£560Lufthansa

Wed, 15 Apr - Wed, 22 Apr

14:50 - 21:22

LHR

BOI

13h 32m

1 stop

10:35 - 09:40

BOI

LHR

16h 05m

1 stop

£575Lufthansa

Mon, 13 Apr - Mon, 20 Apr

15:40 - 22:57

LGW

BOI

38h 17m

2 stops

16:38 - 14:40

BOI

LGW

39h 02m

2 stops

£668Icelandair

Mon, 20 Apr - Mon, 27 Apr

15:40 - 22:57

LGW

BOI

38h 17m

2 stops

16:38 - 14:40

BOI

LGW

39h 02m

2 stops

£671Icelandair

Mon, 20 Apr - Mon, 27 Apr

17:50 - 21:05

LCY

GEG

35h 15m

2 stops

12:36 - 18:30

GEG

LCY

21h 54m

2 stops

£725KLM

Thu, 30 Apr - Tue, 5 May

10:55 - 22:16

LHR

IDA

18h 21m

1 stop

13:10 - 11:00

IDA

LHR

14h 50m

1 stop

£831Virgin Atlantic

Tue, 31 Mar - Tue, 7 Apr

18:55 - 18:15

LHR

IDA

30h 20m

2 stops

13:10 - 12:10

IDA

LHR

16h 00m

2 stops

£838Virgin Atlantic

Tue, 31 Mar - Tue, 7 Apr

20:05 - 19:02

LCY

JAC

28h 57m

2 stops

17:50 - 18:30

JAC

LCY

17h 40m

2 stops

£989KLM

Tue, 24 Mar - Sun, 29 Mar

Fly from

Route

Depart

Return

Price

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 1/5

08:00-18:36

1 stop18h 36m

Spokane

Tue 5/5

07:10-09:00

1 stop17h 50m

£463

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 14/4

08:45-23:02

2 stops21h 17m

Boise Air Term. Gowen Fld

Tue 21/4

07:40-10:10

2 stops19h 30m

£493

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

£560

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 13/4

14:50-21:22

1 stop13h 32m

Boise Air Term. Gowen Fld

Mon 20/4

10:35-09:40

1 stop16h 05m

£575

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Mon 20/4

15:40-22:57

2 stops38h 17m

Boise Air Term. Gowen Fld

Mon 27/4

16:38-14:40

2 stops39h 02m

£668

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Mon 20/4

15:40-22:57

2 stops38h 17m

Boise Air Term. Gowen Fld

Mon 27/4

16:38-14:40

2 stops39h 02m

£671

LondonSpokane

LCY - GEG

LCYGEG

London City

Thu 30/4

17:50-21:05

2 stops35h 15m

Spokane

Tue 5/5

12:36-18:30

2 stops21h 54m

£725

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 31/3

10:55-22:16

1 stop18h 21m

Idaho Falls Fanning Field

Tue 7/4

13:10-11:00

1 stop14h 50m

£831

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 31/3

18:55-18:15

2 stops30h 20m

Idaho Falls Fanning Field

Tue 7/4

13:10-12:10

2 stops16h 00m

£838

LondonJackson

LCY - JAC

LCYJAC

London City

Tue 24/3

20:05-19:02

2 stops28h 57m

Jackson Hole

Sun 29/3

17:50-18:30

2 stops17h 40m

£989

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 8 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	£356
Best Round-Trip Price	£463
Fastest flight time	18h 53m

The best one-way flight price to Idaho from United Kingdom in the last 72 hours is £356 (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 £463 (London Heathrow to Spokane).

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The fastest flight to Idaho from United Kingdom takes 18h 53m (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 £393/per person and the cheapest flight to Idaho is £303/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?

82% 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 8 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 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.