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 13h 31m 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.

£368 Cheap Flights to Idaho in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

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

United Airlines

27 Apr

LHR

17h 42m

1 stop

BOI

3 May

BOI

12h 07m

1 stop

LHR

£487

United Airlines

20 Apr

LHR

19h 28m

2 stops

BOI

27 Apr

BOI

17h 55m

2 stops

LHR

£597

United Airlines

20 Apr

LHR

19h 28m

2 stops

BOI

27 Apr

BOI

18h 10m

1 stop

LHR

£597

United Airlines

21 Apr

LHR

19h 23m

2 stops

BOI

28 Apr

BOI

15h 35m

2 stops

LHR

£598

United Airlines

20 Apr

LHR

19h 28m

2 stops

BOI

27 Apr

BOI

18h 40m

1 stop

LHR

£599

United Airlines

20 Apr

LHR

19h 28m

2 stops

BOI

27 Apr

BOI

17h 55m

2 stops

LHR

£600

Lufthansa

21 Apr

LHR

13h 32m

1 stop

BOI

28 Apr

BOI

14h 48m

1 stop

LHR

£602

Multiple Airlines

1 Sept

LHR

18h 07m

1 stop

BOI

8 Sept

BOI

16h 03m

1 stop

LHR

£613

Scandinavian Airlines

4 Sept

LHR

34h 34m

2 stops

BOI

2 Oct

BOI

37h 38m

2 stops

LHR

£615

United Airlines

20 Apr

LHR

13h 32m

1 stop

BOI

27 Apr

BOI

12h 03m

1 stop

LHR

£620

United Airlines

20 Apr

LHR

16h 18m

1 stop

BOI

27 Apr

BOI

15h 05m

1 stop

LHR

£621

United Airlines

20 Apr

LHR

16h 57m

1 stop

BOI

27 Apr

BOI

15h 25m

1 stop

LHR

£623

Flights to Idaho Falls

Search all flight deals to Idaho Falls

Virgin Atlantic

23 Apr

LHR

17h 15m

2 stops

IDA

30 Apr

IDA

16h 06m

2 stops

LHR

£784

Alaska Airlines

1 Sept

LHR

29h 29m

1 stop

IDA

25 Sept

IDA

16h 02m

1 stop

LHR

£791

American Airlines

3 Jun

LHR

24h 28m

2 stops

IDA

16 Jun

IDA

20h 15m

2 stops

LHR

£802

KLM

1 Sept

LHR

17h 54m

2 stops

IDA

25 Sept

IDA

32h 10m

1 stop

LHR

£805

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

18h 20m

2 stops

LHR

£808

KLM

1 Sept

LHR

28h 19m

2 stops

IDA

25 Sept

IDA

32h 10m

1 stop

LHR

£809

KLM

1 Sept

LHR

28h 19m

2 stops

IDA

25 Sept

IDA

32h 10m

1 stop

LHR

£811

American Airlines

1 Sept

LHR

26h 51m

1 stop

IDA

25 Sept

IDA

17h 39m

1 stop

LHR

£812

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

18h 20m

2 stops

LHR

£814

Multiple Airlines

1 Sept

LHR

15h 24m

1 stop

IDA

25 Sept

IDA

14h 09m

1 stop

LHR

£815

American Airlines

1 Sept

LHR

28h 25m

1 stop

IDA

25 Sept

IDA

14h 09m

1 stop

LHR

£816

Delta

1 Sept

LHR

18h 59m

2 stops

IDA

25 Sept

IDA

18h 20m

2 stops

LHR

£817

Flights to Twin Falls

Search all flight deals to Twin Falls

Delta

22 Apr

GLA

23h 14m

2 stops

TWF

29 Apr

TWF

18h 10m

2 stops

GLA

£1,083

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.

10:35 - 21:17

LHR

BOI

17h 42m

1 stop

14:33 - 09:40

BOI

LHR

12h 07m

1 stop

£487United Airlines

Mon, 27 Apr - Sun, 3 May

17:45 - 22:50

LHR

GEG

13h 05m

1 stop

15:30 - 15:35

GEG

LHR

16h 05m

1 stop

£570Delta

Tue, 31 Mar - Mon, 20 Apr

17:45 - 00:03

LHR

GEG

14h 18m

1 stop

15:30 - 15:35

GEG

LHR

16h 05m

1 stop

£579Delta

Wed, 1 Apr - Mon, 20 Apr

14:50 - 21:22

LHR

BOI

13h 32m

1 stop

14:37 - 12:25

BOI

LHR

14h 48m

1 stop

£602Lufthansa

Tue, 21 Apr - Tue, 28 Apr

15:40 - 23:02

LGW

BOI

38h 22m

2 stops

16:38 - 14:40

BOI

LGW

39h 02m

2 stops

£651Icelandair

Tue, 21 Apr - Tue, 28 Apr

15:40 - 21:31

LGW

GEG

37h 51m

2 stops

12:40 - 14:40

GEG

LGW

18h 00m

2 stops

£666Icelandair

Tue, 21 Apr - Tue, 28 Apr

07:00 - 21:11

MAN

GEG

22h 11m

2 stops

12:35 - 23:15

GEG

MAN

26h 40m

2 stops

£712Lufthansa

Wed, 22 Apr - Wed, 29 Apr

12:25 - 22:40

LHR

IDA

17h 15m

2 stops

13:09 - 12:15

IDA

LHR

16h 06m

2 stops

£784Virgin Atlantic

Thu, 23 Apr - Thu, 30 Apr

11:20 - 22:14

LHR

IDA

17h 54m

2 stops

18:50 - 10:00

IDA

LHR

32h 10m

1 stop

£805KLM

Tue, 1 Sep - Fri, 25 Sep

20:55 - 18:14

LHR

IDA

28h 19m

2 stops

18:50 - 10:00

IDA

LHR

32h 10m

1 stop

£807KLM

Tue, 1 Sep - Fri, 25 Sep

Fly from

Route

Depart

Return

Price

Cheapest return flight

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 27/4

10:35-21:17

1 stop17h 42m

Boise Air Term. Gowen Fld

Sun 3/5

14:33-09:40

1 stop12h 07m

£487

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 31/3

17:45-22:50

1 stop13h 05m

Spokane

Mon 20/4

15:30-15:35

1 stop16h 05m

£570

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 1/4

17:45-00:03

1 stop14h 18m

Spokane

Mon 20/4

15:30-15:35

1 stop16h 05m

£579

Fastest return journey

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 21/4

14:50-21:22

1 stop13h 32m

Boise Air Term. Gowen Fld

Tue 28/4

14:37-12:25

1 stop14h 48m

£602

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Tue 21/4

15:40-23:02

2 stops38h 22m

Boise Air Term. Gowen Fld

Tue 28/4

16:38-14:40

2 stops39h 02m

£651

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Tue 21/4

15:40-21:31

2 stops37h 51m

Spokane

Tue 28/4

12:40-14:40

2 stops18h 00m

£666

ManchesterSpokane

MAN - GEG

MANGEG

Manchester

Wed 22/4

07:00-21:11

2 stops22h 11m

Spokane

Wed 29/4

12:35-23:15

2 stops26h 40m

£712

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Thu 23/4

12:25-22:40

2 stops17h 15m

Idaho Falls Fanning Field

Thu 30/4

13:09-12:15

2 stops16h 06m

£784

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

11:20-22:14

2 stops17h 54m

Idaho Falls Fanning Field

Fri 25/9

18:50-10:00

1 stop32h 10m

£805

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 1/9

20:55-18:14

2 stops28h 19m

Idaho Falls Fanning Field

Fri 25/9

18:50-10:00

1 stop32h 10m

£807

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	£368
Best Round-Trip Price	£487
Fastest flight time	19h 10m

The best one-way flight price to Idaho from United Kingdom in the last 72 hours is £368 (Manchester to Spokane).

Search Deals

The best round-trip flight price to Idaho from United Kingdom in the last 72 hours is £487 (London Heathrow to Boise Air Term. Gowen Fld).

Search Deals

The fastest flight to Idaho from United Kingdom takes 19h 10m (London City to Boise Air Term. Gowen Fld).

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 £395/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 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.