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

Lufthansa, Delta, and SWISS are the most popular carriers operating from United Kingdom to Idaho

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 17h 18m on average. Another popular route from United Kingdom to Idaho is flying from Manchester to Boise, which will take roughly 17h 25m. Keep in mind that layovers or delays could extend your travel time.

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 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.

$516 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.

10:50 am - 11:50 pm

LHR

BOI

20h 00m

2 stops

10:37 am - 7:45 am

BOI

LHR

38h 08m

2 stops

$888United Airlines

Wed, Sep 16 - Sun, Sep 20

10:50 am - 11:50 pm

LHR

BOI

20h 00m

2 stops

10:37 am - 7:45 am

BOI

LHR

38h 08m

2 stops

$889United Airlines

Wed, Sep 16 - Sun, Sep 20

10:50 am - 11:50 pm

LHR

BOI

20h 00m

2 stops

7:01 pm - 7:25 am

BOI

LHR

29h 24m

1 stop

$894United Airlines

Wed, Sep 16 - Sun, Sep 20

6:40 am - 6:35 pm

LHR

BOI

18h 55m

2 stops

10:23 am - 5:40 pm

BOI

LHR

24h 17m

2 stops

$935Scandinavian Airlines

Sat, Sep 5 - Sat, Sep 19

2:50 pm - 9:16 pm

LHR

BOI

13h 26m

1 stop

10:39 am - 9:40 am

BOI

LHR

16h 01m

1 stop

$964Lufthansa

Fri, Oct 9 - Fri, Oct 23

6:40 am - 6:43 pm

LHR

GEG

20h 03m

2 stops

1:11 pm - 4:00 pm

GEG

LHR

18h 49m

2 stops

$975Scandinavian Airlines

Fri, May 29 - Fri, Jun 5

7:15 pm - 6:23 pm

LHR

GEG

31h 08m

2 stops

4:15 pm - 12:10 pm

GEG

LHR

11h 55m

1 stop

$984Virgin Atlantic

Mon, May 4 - Mon, May 18

11:40 am - 6:57 pm

LHR

GEG

15h 17m

1 stop

2:16 pm - 1:05 pm

GEG

LHR

14h 49m

1 stop

$1,003Virgin Atlantic

Mon, May 4 - Mon, May 18

4:10 pm - 2:19 pm

LHR

GEG

30h 09m

1 stop

5:44 am - 10:15 am

GEG

LHR

20h 31m

2 stops

$1,007American Airlines

Mon, May 4 - Tue, Jun 2

7:00 am - 6:51 pm

MAN

GEG

19h 51m

2 stops

12:25 pm - 11:15 pm

GEG

MAN

26h 50m

2 stops

$1,153Lufthansa

Wed, Apr 29 - Mon, May 18

Alaska Airlines flights from United Kingdom to Idaho

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

Alaska Airlines

Jun 22

LHR5:00 pmLondon Heathrow

14h 04m

1 stop

BOI12:04 amBoise Air Term. Gowen Fld

Jun 29

BOI6:13 pmBoise Air Term. Gowen Fld

13h 52m

1 stop

LHR3:05 pmLondon Heathrow

$1,113

Alaska Airlines

Jun 9

LHR5:00 pmLondon Heathrow

29h 37m

1 stop

IDA3:37 pmIdaho Falls Fanning Field

Jun 16

IDA7:15 amIdaho Falls Fanning Field

24h 50m

1 stop

LHR3:05 pmLondon Heathrow

$1,205

Lufthansa flights from United Kingdom to Idaho

Our best Lufthansa deals on United Kingdom to Idaho flight tickets

Lufthansa

Oct 9

LHR2:50 pmLondon Heathrow

13h 26m

1 stop

BOI9:16 pmBoise Air Term. Gowen Fld

Oct 23

BOI10:39 amBoise Air Term. Gowen Fld

16h 01m

1 stop

LHR9:40 amLondon Heathrow

$964

Lufthansa

May 27

LHR11:25 amLondon Heathrow

13h 31m

1 stop

BOI5:56 pmBoise Air Term. Gowen Fld

Jun 3

BOI2:40 pmBoise Air Term. Gowen Fld

14h 55m

1 stop

LHR12:35 pmLondon Heathrow

$1,057

Lufthansa

Jun 23

LHR1:05 pmLondon Heathrow

17h 50m

2 stops

BOI11:55 pmBoise Air Term. Gowen Fld

Jul 4

BOI5:00 amBoise Air Term. Gowen Fld

22h 00m

2 stops

LHR10:00 amLondon Heathrow

$1,075

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 9/16

10:50 am-11:50 pm

2 stops20h 00m

Boise Air Term. Gowen Fld

Sun 9/20

10:37 am-7:45 am

2 stops38h 08m

$888

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 9/16

10:50 am-11:50 pm

2 stops20h 00m

Boise Air Term. Gowen Fld

Sun 9/20

10:37 am-7:45 am

2 stops38h 08m

$889

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Wed 9/16

10:50 am-11:50 pm

2 stops20h 00m

Boise Air Term. Gowen Fld

Sun 9/20

7:01 pm-7:25 am

1 stop29h 24m

$894

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 9/5

6:40 am-6:35 pm

2 stops18h 55m

Boise Air Term. Gowen Fld

Sat 9/19

10:23 am-5:40 pm

2 stops24h 17m

$935

Quickest round-trip

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 10/9

2:50 pm-9:16 pm

1 stop13h 26m

Boise Air Term. Gowen Fld

Fri 10/23

10:39 am-9:40 am

1 stop16h 01m

$964

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 5/29

6:40 am-6:43 pm

2 stops20h 03m

Spokane

Fri 6/5

1:11 pm-4:00 pm

2 stops18h 49m

$975

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 5/4

7:15 pm-6:23 pm

2 stops31h 08m

Spokane

Mon 5/18

4:15 pm-12:10 pm

1 stop11h 55m

$984

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 5/4

11:40 am-6:57 pm

1 stop15h 17m

Spokane

Mon 5/18

2:16 pm-1:05 pm

1 stop14h 49m

$1,003

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 5/4

4:10 pm-2:19 pm

1 stop30h 09m

Spokane

Tue 6/2

5:44 am-10:15 am

2 stops20h 31m

$1,007

ManchesterSpokane

MAN - GEG

MANGEG

Manchester

Wed 4/29

7:00 am-6:51 pm

2 stops19h 51m

Spokane

Mon 5/18

12:25 pm-11:15 pm

2 stops26h 50m

$1,153

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 $765. If you don’t want to visit Idaho in January, then you should wait until September to fly from United Kingdom, when ticket prices are also cheap, with an average price of $809.

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

You could potentially save up to 13% 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	13h 08m
Direct flights	None

The fastest flight from United Kingdom to Idaho takes 13h 08m

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

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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 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.