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 21h 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.

£260 Cheap Flights to Idaho in 2026

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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

25 Sept

LHR

22h 54m

2 stops

BOI

3 Oct

BOI

24h 06m

2 stops

LHR

£590

Scandinavian Airlines

25 Sept

LHR

22h 54m

2 stops

BOI

3 Oct

BOI

24h 06m

2 stops

LHR

£591

Scandinavian Airlines

25 Sept

LHR

22h 54m

2 stops

BOI

3 Oct

BOI

23h 26m

3 stops

LHR

£595

Scandinavian Airlines

25 Sept

LHR

18h 59m

2 stops

BOI

3 Oct

BOI

21h 43m

3 stops

LHR

£596

Scandinavian Airlines

3 Oct

LHR

19h 00m

2 stops

BOI

10 Oct

BOI

26h 32m

2 stops

LHR

£620

Scandinavian Airlines

2 Oct

LHR

28h 35m

3 stops

BOI

11 Oct

BOI

22h 32m

2 stops

LHR

£626

Scandinavian Airlines

2 Oct

LHR

28h 35m

3 stops

BOI

11 Oct

BOI

21h 17m

3 stops

LHR

£629

Scandinavian Airlines

7 Nov

LHR

19h 44m

2 stops

BOI

11 Nov

BOI

40h 46m

2 stops

LHR

£631

Lufthansa

25 Sept

LHR

17h 10m

1 stop

BOI

3 Oct

BOI

17h 22m

1 stop

LHR

£672

Lufthansa

25 Sept

LHR

21h 58m

1 stop

BOI

3 Oct

BOI

15h 37m

1 stop

LHR

£673

United Airlines

7 Nov

LHR

21h 40m

2 stops

BOI

11 Nov

BOI

20h 10m

1 stop

LHR

£681

United Airlines

29 Sept

LHR

22h 59m

2 stops

BOI

4 Oct

BOI

31h 15m

2 stops

LHR

£686

Flights to Idaho Falls

Search all flight deals to Idaho Falls

Alaska Airlines

28 Jan

LHR

31h 36m

1 stop

IDA

1 Feb

IDA

15h 24m

1 stop

LHR

£722

Alaska Airlines

28 Jan

LHR

31h 36m

1 stop

IDA

1 Feb

IDA

15h 24m

1 stop

LHR

£803

Multiple Airlines

22 Sept

LHR

18h 27m

1 stop

IDA

29 Sept

IDA

14h 55m

1 stop

LHR

£810

KLM

22 Sept

LHR

32h 27m

2 stops

IDA

29 Sept

IDA

19h 30m

2 stops

LHR

£815

Delta

22 Sept

LHR

19h 02m

2 stops

IDA

29 Sept

IDA

22h 00m

1 stop

LHR

£820

American Airlines

22 Sept

LHR

19h 25m

1 stop

IDA

29 Sept

IDA

15h 17m

1 stop

LHR

£836

American Airlines

22 Sept

LHR

20h 00m

2 stops

IDA

29 Sept

IDA

15h 17m

1 stop

LHR

£840

Multiple Airlines

7 Nov

EDI

21h 19m

2 stops

IDA

6 Dec

IDA

19h 27m

2 stops

EDI

£863

United Airlines

28 Jan

LHR

17h 47m

2 stops

IDA

1 Feb

IDA

19h 40m

1 stop

LHR

£888

United Airlines

22 Sept

LHR

17h 53m

2 stops

IDA

29 Sept

IDA

17h 05m

2 stops

LHR

£905

United Airlines

28 Jan

LHR

17h 47m

2 stops

IDA

1 Feb

IDA

15h 25m

2 stops

LHR

£969

United Airlines

9 Oct

GLA

30h 24m

2 stops

IDA

16 Oct

IDA

36h 42m

2 stops

GLA

£981

Flights to Hailey

Search all flight deals to Hailey

Alaska Airlines

14 Jan

LHR

26h 56m

1 stop

SUN

18 Jan

SUN

33h 43m

1 stop

LHR

£722

Alaska Airlines

7 Oct

LHR

25h 06m

1 stop

SUN

14 Oct

SUN

20h 17m

1 stop

LHR

£787

Alaska Airlines

8 Oct

LHR

25h 06m

1 stop

SUN

15 Oct

SUN

20h 17m

1 stop

LHR

£792

Alaska Airlines

8 Oct

LHR

25h 06m

1 stop

SUN

15 Oct

SUN

20h 17m

1 stop

LHR

£800

Alaska Airlines

14 Jan

LHR

26h 56m

1 stop

SUN

18 Jan

SUN

33h 43m

1 stop

LHR

£803

Virgin Atlantic

8 Oct

LHR

16h 46m

2 stops

SUN

15 Oct

SUN

19h 35m

2 stops

LHR

£838

Delta

8 Oct

LHR

22h 41m

2 stops

SUN

15 Oct

SUN

22h 45m

2 stops

LHR

£846

Delta

8 Oct

LHR

18h 16m

1 stop

SUN

15 Oct

SUN

22h 45m

2 stops

LHR

£860

United Airlines

7 Oct

LHR

36h 37m

1 stop

SUN

14 Oct

SUN

35h 21m

2 stops

LHR

£886

United Airlines

14 Jan

LHR

18h 11m

2 stops

SUN

18 Jan

SUN

20h 25m

2 stops

LHR

£912

United Airlines

7 Oct

LHR

18h 45m

2 stops

SUN

14 Oct

SUN

17h 15m

2 stops

LHR

£932

United Airlines

14 Jan

LHR

18h 11m

2 stops

SUN

18 Jan

SUN

20h 25m

2 stops

LHR

£993

Find the cheapest flights from the United Kingdom to Idaho

Return

One-way

Recent return flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

06:40 - 22:34LHR London Heathrow-BOI Boise Air Term. Gowen Fld

22h 54m2 stops Kastrup Copenhagen Seattle/Tacoma Intl

10:34 - 17:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

24h 06m2 stops Seattle/Tacoma Intl Kastrup Copenhagen

£590Scandinavian Airlines

Fri, 25 Sep - Sat, 3 Oct

06:40 - 22:34LHR London Heathrow-BOI Boise Air Term. Gowen Fld

22h 54m2 stops Kastrup Copenhagen Seattle/Tacoma Intl

10:34 - 17:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

24h 06m2 stops Seattle/Tacoma Intl Kastrup Copenhagen

£591Scandinavian Airlines

Fri, 25 Sep - Sat, 3 Oct

06:50 - 11:39LHR London Heathrow-GEG Spokane

36h 49m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

06:00 - 12:25GEG Spokane-LHR London Heathrow

22h 25m2 stops San Francisco Denver Intl

£663United Airlines

Mon, 5 Oct - Mon, 12 Oct

08:00 - 22:58LHR London Heathrow-BOI Boise Air Term. Gowen Fld

21h 58m1 stop Chicago O'Hare Intl

10:35 - 09:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

16h 05m1 stop Denver Intl

£672Lufthansa

Sat, 3 Oct - Sat, 10 Oct

11:25 - 21:35LHR London Heathrow-BOI Boise Air Term. Gowen Fld

17h 10m1 stop Denver Intl

08:08 - 08:30BOI Boise Air Term. Gowen Fld-LHR London Heathrow

17h 22m1 stop Chicago O'Hare Intl

£672Lufthansa

Fri, 25 Sep - Sat, 3 Oct

06:35 - 21:15LHR London Heathrow-BOI Boise Air Term. Gowen Fld

21h 40m2 stops Munich Franz Josef Strauss San Francisco

06:30 - 09:40BOI Boise Air Term. Gowen Fld-LHR London Heathrow

20h 10m1 stop Denver Intl

£681United Airlines

Sat, 7 Nov - Wed, 11 Nov

14:45 - 15:21LHR London Heathrow-IDA Idaho Falls Fanning Field

31h 36m1 stop Seattle/Tacoma Intl

13:56 - 12:20IDA Idaho Falls Fanning Field-LHR London Heathrow

15h 24m1 stop Seattle/Tacoma Intl

£722Alaska Airlines

Thu, 28 Jan - Mon, 1 Feb

14:45 - 10:41LHR London Heathrow-SUN Hailey Sun Valley-Friedman

26h 56m1 stop Seattle/Tacoma Intl

19:37 - 12:20SUN Hailey Sun Valley-Friedman-LHR London Heathrow

33h 43m1 stop Seattle/Tacoma Intl

£722Alaska Airlines

Thu, 14 Jan - Mon, 18 Jan

16:20 - 16:21LHR London Heathrow-GEG Spokane

32h 01m2 stops New York John F Kennedy Intl Salt Lake City

13:00 - 11:20GEG Spokane-LHR London Heathrow

14h 20m1 stop Seattle/Tacoma Intl

£760Virgin Atlantic

Tue, 8 Sep - Wed, 16 Sep

18:30 - 23:59LHR London Heathrow-GEG Spokane

13h 29m1 stop Seattle/Tacoma Intl

19:30 - 11:20GEG Spokane-LHR London Heathrow

31h 50m1 stop Seattle/Tacoma Intl

£776Virgin Atlantic

Sun, 20 Sep - Sun, 27 Sep

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 25/9

06:40-22:34

2 stops22h 54m

Boise Air Term. Gowen Fld

Sat 3/10

10:34-17:40

2 stops24h 06m

£590

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 25/9

06:40-22:34

2 stops22h 54m

Boise Air Term. Gowen Fld

Sat 3/10

10:34-17:40

2 stops24h 06m

£591

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 5/10

06:50-11:39

2 stops36h 49m

Spokane

Mon 12/10

06:00-12:25

2 stops22h 25m

£663

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 3/10

08:00-22:58

1 stop21h 58m

Boise Air Term. Gowen Fld

Sat 10/10

10:35-09:40

1 stop16h 05m

£672

Fastest return journey

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 25/9

11:25-21:35

1 stop17h 10m

Boise Air Term. Gowen Fld

Sat 3/10

08:08-08:30

1 stop17h 22m

£672

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 7/11

06:35-21:15

2 stops21h 40m

Boise Air Term. Gowen Fld

Wed 11/11

06:30-09:40

1 stop20h 10m

£681

LondonIdaho Falls

LHR London Heathrow - IDA Idaho Falls Fanning Field

LHRIDA

London Heathrow

Thu 28/1

14:45-15:21

1 stop31h 36m

Idaho Falls Fanning Field

Mon 1/2

13:56-12:20

1 stop15h 24m

£722

LondonHailey

LHR London Heathrow - SUN Hailey Sun Valley-Friedman

LHRSUN

London Heathrow

Thu 14/1

14:45-10:41

1 stop26h 56m

Hailey Sun Valley-Friedman

Mon 18/1

19:37-12:20

1 stop33h 43m

£722

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Tue 8/9

16:20-16:21

2 stops32h 01m

Spokane

Wed 16/9

13:00-11:20

1 stop14h 20m

£760

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Sun 20/9

18:30-23:59

1 stop13h 29m

Spokane

Sun 27/9

19:30-11:20

1 stop31h 50m

£776

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 38% of people opting to fly with this airline when travelling to Idaho. Keep in mind that there are 6 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	£260
Best Round-Trip Price	£590
Fastest flight time	20h 43m

The best one-way flight price to Idaho from United Kingdom in the last 5 days is £260 (Edinburgh Turnhouse to Boise Air Term. Gowen Fld).

Search Deals

The best return flight price to Idaho from United Kingdom in the last 5 days is £590 (London Heathrow to Boise Air Term. Gowen Fld).

Search Deals

The fastest flight to Idaho from United Kingdom takes 20h 43m (London Heathrow to Jackson Hole).

Search Deals

Frequently asked questions about flying to Idaho

What is the cheapest flight I can find to Idaho?

The average flight to Idaho costs £389/per person and the cheapest flight to Idaho is £299/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?

86% 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 6 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 43% 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 August 2026, there are 6 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.