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 03m 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.

£345 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

United Airlines

4 Nov

LHR

23h 19m

2 stops

BOI

8 Nov

BOI

37h 51m

2 stops

LHR

£623

United Airlines

22 Jun

LHR

17h 55m

1 stop

BOI

28 Jun

BOI

11h 49m

1 stop

LHR

£631

United Airlines

4 Nov

LHR

19h 15m

2 stops

BOI

11 Nov

BOI

16h 20m

2 stops

LHR

£655

United Airlines

4 Nov

LHR

19h 41m

1 stop

BOI

11 Nov

BOI

11h 57m

1 stop

LHR

£683

United Airlines

4 Sept

LHR

22h 15m

2 stops

BOI

7 Sept

BOI

32h 56m

1 stop

LHR

£687

United Airlines

5 Sept

LHR

18h 03m

2 stops

BOI

7 Sept

BOI

29h 20m

1 stop

LHR

£688

United Airlines

5 Sept

LHR

18h 03m

2 stops

BOI

7 Sept

BOI

29h 20m

1 stop

LHR

£689

United Airlines

4 Nov

LHR

16h 31m

1 stop

BOI

8 Nov

BOI

12h 26m

1 stop

LHR

£713

Lufthansa

4 Sept

LHR

13h 33m

1 stop

BOI

7 Sept

BOI

35h 21m

1 stop

LHR

£727

Lufthansa

4 Nov

LCY

18h 26m

2 stops

BOI

11 Nov

BOI

19h 57m

2 stops

LCY

£733

Multiple Airlines

4 Nov

LHR

25h 43m

3 stops

BOI

11 Nov

BOI

17h 05m

2 stops

LHR

£744

United Airlines

5 Sept

LHR

18h 03m

2 stops

BOI

7 Sept

BOI

17h 15m

2 stops

LHR

£745

Flights to Idaho Falls

Search all flight deals to Idaho Falls

American Airlines

1 Sept

LHR

19h 25m

1 stop

IDA

25 Sept

IDA

15h 40m

1 stop

LHR

£823

American Airlines

1 Sept

LHR

19h 25m

1 stop

IDA

25 Sept

IDA

15h 40m

1 stop

LHR

£825

American Airlines

1 Sept

LHR

18h 15m

2 stops

IDA

25 Sept

IDA

15h 40m

1 stop

LHR

£827

American Airlines

1 Sept

LHR

18h 15m

1 stop

IDA

25 Sept

IDA

13h 50m

1 stop

LHR

£828

American Airlines

1 Sept

LHR

18h 15m

2 stops

IDA

25 Sept

IDA

15h 40m

1 stop

LHR

£828

American Airlines

1 Sept

LHR

18h 15m

2 stops

IDA

25 Sept

IDA

15h 40m

1 stop

LHR

£829

American Airlines

1 Sept

LHR

18h 35m

2 stops

IDA

25 Sept

IDA

13h 52m

1 stop

LHR

£831

Icelandair

1 Sept

LHR

40h 51m

2 stops

IDA

25 Sept

IDA

22h 37m

2 stops

LHR

£832

Delta

1 Sept

LHR

19h 05m

2 stops

IDA

25 Sept

IDA

17h 01m

2 stops

LHR

£840

Delta

1 Sept

LHR

19h 05m

2 stops

IDA

25 Sept

IDA

17h 01m

2 stops

LHR

£845

Delta

1 Sept

LHR

18h 47m

2 stops

IDA

25 Sept

IDA

17h 01m

2 stops

LHR

£849

Delta

1 Sept

LHR

17h 07m

2 stops

IDA

25 Sept

IDA

17h 01m

2 stops

LHR

£849

Flights to Hailey

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Multiple Airlines

24 Jul

LHR

19h 31m

2 stops

SUN

31 Jul

SUN

17h 20m

2 stops

LHR

£888

KLM

23 Jun

LHR

16h 44m

2 stops

SUN

28 Jun

SUN

38h 50m

2 stops

LHR

£902

Delta

15 Jul

LHR

22h 37m

2 stops

SUN

3 Aug

SUN

19h 20m

1 stop

LHR

£974

Delta

15 Jul

LHR

18h 12m

1 stop

SUN

3 Aug

SUN

19h 20m

1 stop

LHR

£987

Delta

15 Jul

LHR

18h 12m

1 stop

SUN

3 Aug

SUN

13h 54m

1 stop

LHR

£990

United Airlines

4 Jul

LHR

17h 58m

1 stop

SUN

18 Jul

SUN

17h 55m

2 stops

LHR

£1,031

Delta

15 Jul

LHR

19h 47m

2 stops

SUN

3 Aug

SUN

13h 54m

1 stop

LHR

£1,037

KLM

15 Jul

LHR

17h 22m

2 stops

SUN

3 Aug

SUN

19h 20m

1 stop

LHR

£1,078

Multiple Airlines

24 Jul

LHR

16h 11m

1 stop

SUN

31 Jul

SUN

13h 25m

1 stop

LHR

£1,082

Delta

15 Jul

LHR

22h 37m

2 stops

SUN

3 Aug

SUN

16h 30m

2 stops

LHR

£1,095

United Airlines

23 Jun

LHR

18h 01m

2 stops

SUN

28 Jun

SUN

12h 02m

1 stop

LHR

£1,104

Multiple Airlines

26 Jul

LHR

30h 48m

2 stops

SUN

2 Aug

SUN

24h 00m

2 stops

LHR

£1,109

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.

13:05 - 23:59

LHR

GEG

18h 54m

2 stops

06:13 - 11:55

GEG

LHR

45h 42m

2 stops

£594Multiple Airlines

Thu, 9 Jul - Wed, 22 Jul

07:40 - 23:38

LHR

GEG

23h 58m

2 stops

12:30 - 11:15

GEG

LHR

14h 45m

1 stop

£621United Airlines

Tue, 10 Nov - Tue, 17 Nov

11:35 - 21:09

LHR

GEG

17h 34m

1 stop

07:02 - 07:25

GEG

LHR

16h 23m

1 stop

£675Lufthansa

Tue, 10 Nov - Tue, 17 Nov

11:25 - 17:58

LHR

BOI

13h 33m

1 stop

12:24 - 06:45

BOI

LHR

35h 21m

1 stop

£727Lufthansa

Fri, 4 Sep - Mon, 7 Sep

10:00 - 21:37

LGW

GEG

19h 37m

2 stops

10:50 - 15:45

GEG

LGW

20h 55m

2 stops

£735Virgin Atlantic

Tue, 10 Nov - Tue, 17 Nov

09:20 - 19:27

LCY

GEG

18h 07m

2 stops

10:05 - 16:35

GEG

LCY

22h 30m

2 stops

£743Virgin Atlantic

Tue, 10 Nov - Tue, 17 Nov

15:40 - 23:59

LGW

GEG

16h 19m

2 stops

20:33 - 14:40

GEG

LGW

34h 07m

2 stops

£748Icelandair

Fri, 4 Sep - Mon, 7 Sep

13:05 - 22:56

LHR

IDA

40h 51m

2 stops

06:18 - 11:55

IDA

LHR

22h 37m

2 stops

£832Icelandair

Tue, 1 Sep - Fri, 25 Sep

09:20 - 00:02

LCY

GEG

22h 42m

2 stops

07:00 - 07:15

GEG

LCY

16h 15m

2 stops

£972KLM

Thu, 9 Jul - Wed, 22 Jul

09:20 - 00:02

LCY

GEG

22h 42m

2 stops

07:00 - 07:15

GEG

LCY

16h 15m

2 stops

£973KLM

Thu, 9 Jul - Wed, 22 Jul

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 9/7

13:05-23:59

2 stops18h 54m

Spokane

Wed 22/7

06:13-11:55

2 stops45h 42m

£594

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/11

07:40-23:38

2 stops23h 58m

Spokane

Tue 17/11

12:30-11:15

1 stop14h 45m

£621

Fastest return journey

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 10/11

11:35-21:09

1 stop17h 34m

Spokane

Tue 17/11

07:02-07:25

1 stop16h 23m

£675

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 4/9

11:25-17:58

1 stop13h 33m

Boise Air Term. Gowen Fld

Mon 7/9

12:24-06:45

1 stop35h 21m

£727

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Tue 10/11

10:00-21:37

2 stops19h 37m

Spokane

Tue 17/11

10:50-15:45

2 stops20h 55m

£735

LondonSpokane

LCY - GEG

LCYGEG

London City

Tue 10/11

09:20-19:27

2 stops18h 07m

Spokane

Tue 17/11

10:05-16:35

2 stops22h 30m

£743

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Fri 4/9

15:40-23:59

2 stops16h 19m

Spokane

Mon 7/9

20:33-14:40

2 stops34h 07m

£748

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

13:05-22:56

2 stops40h 51m

Idaho Falls Fanning Field

Fri 25/9

06:18-11:55

2 stops22h 37m

£832

LondonSpokane

LCY - GEG

LCYGEG

London City

Thu 9/7

09:20-00:02

2 stops22h 42m

Spokane

Wed 22/7

07:00-07:15

2 stops16h 15m

£972

LondonSpokane

LCY - GEG

LCYGEG

London City

Thu 9/7

09:20-00:02

2 stops22h 42m

Spokane

Wed 22/7

07:00-07:15

2 stops16h 15m

£973

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 42% 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	£345
Best Round-Trip Price	£594
Fastest flight time	16h 27m

The best one-way flight price to Idaho from United Kingdom in the last 5 days is £345 (London Gatwick to Spokane).

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The best round-trip flight price to Idaho from United Kingdom in the last 5 days is £594 (London Heathrow to Spokane).

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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?

79% 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 48% 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 June 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.