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 and flying into Boise (one of the most popular routes), then the duration is 16h 21m on average. Another popular route from United Kingdom to Idaho is flying from Manchester to Boise, which will take roughly 16h 35m. Keep in mind that layovers or delays could extend your travel time.

What is the cheapest airline that flies from United Kingdom to Idaho?

Lufthansa, Icelandair, and American Airlines are the most popular carriers operating from United Kingdom to Idaho

When did momondo last update prices for flights from United Kingdom to Idaho?

Prices for flights from United Kingdom to Idaho are updated daily.

How many operators does momondo search for flights from United Kingdom to Idaho?

There is 1 operator available for flights from United Kingdom to Idaho as of June 2026.

How old do you have to be to fly from United Kingdom to Idaho?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United Kingdom to Idaho.

What documentation or ID do you need to fly to Idaho?

The necessary travel and health documents for your Idaho trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$529 Cheap Flights from the United Kingdom to Idaho in 2026

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Find the cheapest flights from the United Kingdom to Idaho

Round-trip

One-way

Last minute

Recent round-trip flight deals from the United Kingdom to Idaho

Enter your travel dates to find the best prices.

9:30 am - 9:37 pm

LHR

BOI

19h 07m

2 stops

2:41 pm - 9:40 am

BOI

LHR

11h 59m

1 stop

$881Lufthansa

Wed, Sep 2 - Mon, Sep 14

11:10 am - 11:05 pm

LHR

BOI

18h 55m

2 stops

10:39 am - 7:30 am

BOI

LHR

37h 51m

2 stops

$886United Airlines

Wed, Nov 4 - Sun, Nov 8

5:00 pm - 11:44 pm

LHR

BOI

13h 44m

1 stop

10:00 am - 3:05 pm

BOI

LHR

22h 05m

1 stop

$905Alaska Airlines

Wed, Sep 2 - Mon, Sep 14

9:30 am - 9:37 pm

LHR

BOI

19h 07m

2 stops

7:05 pm - 6:30 am

BOI

LHR

28h 25m

2 stops

$915Multiple Airlines

Wed, Sep 2 - Mon, Sep 14

5:00 pm - 11:44 pm

LHR

BOI

13h 44m

1 stop

7:48 pm - 3:05 pm

BOI

LHR

12h 17m

1 stop

$939Alaska Airlines

Tue, Sep 1 - Mon, Sep 14

3:40 pm - 8:56 pm

LGW

GEG

37h 16m

2 stops

7:45 pm - 11:45 am

GEG

LGW

32h 00m

2 stops

$1,061Icelandair

Fri, Jun 26 - Fri, Jul 3

9:25 pm - 9:01 pm

LHR

GEG

31h 36m

2 stops

6:21 pm - 3:05 pm

GEG

LHR

12h 44m

1 stop

$1,070Multiple Airlines

Sun, Aug 23 - Tue, Sep 1

1:00 pm - 10:24 pm

LGW

BOI

16h 24m

2 stops

6:10 pm - 2:40 pm

BOI

LGW

37h 30m

2 stops

$1,091Icelandair

Tue, Jun 23 - Sat, Jul 4

6:15 am - 6:20 pm

LHR

IDA

19h 05m

2 stops

6:57 pm - 8:10 pm

IDA

LHR

18h 13m

2 stops

$1,139Delta

Tue, Sep 1 - Fri, Sep 25

6:15 am - 6:20 pm

LHR

IDA

19h 05m

2 stops

6:57 pm - 8:10 pm

IDA

LHR

18h 13m

2 stops

$1,141Delta

Tue, Sep 1 - Fri, Sep 25

Lufthansa flights from United Kingdom to Idaho

Our best Lufthansa deals on United Kingdom to Idaho flight tickets

Lufthansa

Sep 2

LHR9:30 amLondon Heathrow

19h 07m

2 stops

BOI9:37 pmBoise Air Term. Gowen Fld

Sep 14

BOI2:41 pmBoise Air Term. Gowen Fld

11h 59m

1 stop

LHR9:40 amLondon Heathrow

$881

Lufthansa

Jul 7

LHR7:30 amLondon Heathrow

21h 35m

2 stops

GEG9:05 pmSpokane

Jul 21

GEG12:37 pmSpokane

17h 33m

1 stop

LHR2:10 pmLondon Heathrow

$1,012

Lufthansa

Jul 7

LHR7:30 amLondon Heathrow

21h 35m

2 stops

GEG9:05 pmSpokane

Jul 21

GEG1:41 pmSpokane

21h 59m

2 stops

LHR7:40 pmLondon Heathrow

$1,016

Alaska Airlines flights from United Kingdom to Idaho

Our best Alaska Airlines deals on United Kingdom to Idaho flight tickets

Alaska Airlines

Sep 2

LHR5:00 pmLondon Heathrow

13h 44m

1 stop

BOI11:44 pmBoise Air Term. Gowen Fld

Sep 14

BOI10:00 amBoise Air Term. Gowen Fld

22h 05m

1 stop

LHR3:05 pmLondon Heathrow

$905

Alaska Airlines

Sep 1

LHR5:00 pmLondon Heathrow

13h 44m

1 stop

BOI11:44 pmBoise Air Term. Gowen Fld

Sep 14

BOI7:48 pmBoise Air Term. Gowen Fld

12h 17m

1 stop

LHR3:05 pmLondon Heathrow

$939

Alaska Airlines

Sep 1

LHR5:00 pmLondon Heathrow

13h 44m

1 stop

BOI11:44 pmBoise Air Term. Gowen Fld

Sep 13

BOI5:52 pmBoise Air Term. Gowen Fld

14h 13m

1 stop

LHR3:05 pmLondon Heathrow

$978

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 9/2

9:30 am-9:37 pm

2 stops19h 07m

Boise Air Term. Gowen Fld

Mon 9/14

2:41 pm-9:40 am

1 stop11h 59m

$881

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 11/4

11:10 am-11:05 pm

2 stops18h 55m

Boise Air Term. Gowen Fld

Sun 11/8

10:39 am-7:30 am

2 stops37h 51m

$886

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 9/2

5:00 pm-11:44 pm

1 stop13h 44m

Boise Air Term. Gowen Fld

Mon 9/14

10:00 am-3:05 pm

1 stop22h 05m

$905

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 9/2

9:30 am-9:37 pm

2 stops19h 07m

Boise Air Term. Gowen Fld

Mon 9/14

7:05 pm-6:30 am

2 stops28h 25m

$915

Quickest round-trip

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 9/1

5:00 pm-11:44 pm

1 stop13h 44m

Boise Air Term. Gowen Fld

Mon 9/14

7:48 pm-3:05 pm

1 stop12h 17m

$939

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Fri 6/26

3:40 pm-8:56 pm

2 stops37h 16m

Spokane

Fri 7/3

7:45 pm-11:45 am

2 stops32h 00m

$1,061

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 8/23

9:25 pm-9:01 pm

2 stops31h 36m

Spokane

Tue 9/1

6:21 pm-3:05 pm

1 stop12h 44m

$1,070

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Tue 6/23

1:00 pm-10:24 pm

2 stops16h 24m

Boise Air Term. Gowen Fld

Sat 7/4

6:10 pm-2:40 pm

2 stops37h 30m

$1,091

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/1

6:15 am-6:20 pm

2 stops19h 05m

Idaho Falls Fanning Field

Fri 9/25

6:57 pm-8:10 pm

2 stops18h 13m

$1,139

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Tue 9/1

6:15 am-6:20 pm

2 stops19h 05m

Idaho Falls Fanning Field

Fri 9/25

6:57 pm-8:10 pm

2 stops18h 13m

$1,141

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from United Kingdom to Idaho

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Idaho?

In general, January is the cheapest month to fly from United Kingdom to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $673. If you don’t want to visit Idaho in January, then you should wait until March to fly from United Kingdom, when ticket prices are also cheap, with an average price of $682.

Can stopping save me money on United Kingdom to Idaho flights?

You could potentially save up to 14% on your flight if you consider stops on a United Kingdom to Idaho flight.

Cheap United Kingdom to Idaho flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United Kingdom to Idaho

Fastest flight time	15h 25m
Direct flights	None

The fastest flight from United Kingdom to Idaho takes 15h 25m

There are no direct flights from United Kingdom to Idaho. There are no popular flight routes from United Kingdom to Idaho.

Search flight deals

Frequently asked questions about flying from the United Kingdom to Idaho

When did momondo last update prices for flights from United Kingdom to Idaho?
Prices for flights from United Kingdom to Idaho are updated daily.
How many operators does momondo search for flights from United Kingdom to Idaho?
There is 1 operator available for flights from United Kingdom to Idaho as of June 2026.
How old do you have to be to fly from United Kingdom to Idaho?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United Kingdom to Idaho.
What documentation or ID do you need to fly to Idaho?
The necessary travel and health documents for your Idaho trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking 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 from United Kingdom to Idaho?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from United Kingdom to Idaho. momondo saves you time and could save you money on your trip.

Can I find flights from United Kingdom to Idaho with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for United Kingdom to Idaho flights to just show those with flexible booking policies.

How can momondo help me find flights from United Kingdom 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 from United Kingdom to Idaho.

I’m not ready to book a flight from United Kingdom to Idaho right now. Can momondo alert me if prices change?

If you are not ready to book a flight from United Kingdom to Idaho now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Idaho and let you know when they change.