What is the cheapest airline that flies from London to Idaho?

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

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

Prices for flights from London to Idaho refresh daily.

How old do you have to be to fly from London 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 from London to Idaho.

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

The required travel and health documents for your Idaho trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$413 Cheap Flights from London to Idaho in 2026

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Find the cheapest flights from London to Idaho

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:00 pm - 9:17 pm

LHR

BOI

15h 17m

1 stop

8:34 am - 6:45 am

BOI

LHR

15h 11m

1 stop

$675United Airlines

Mon, Apr 27 - Sun, May 3

5:45 pm - 10:50 pm

LHR

GEG

13h 05m

1 stop

3:30 pm - 3:35 pm

GEG

LHR

16h 05m

1 stop

$786Delta

Tue, Mar 31 - Mon, Apr 20

6:30 am - 9:35 pm

LHR

GEG

23h 05m

2 stops

12:25 pm - 2:10 pm

GEG

LHR

17h 45m

1 stop

$806Lufthansa

Mon, Apr 27 - Mon, May 4

7:30 am - 9:35 pm

LHR

GEG

22h 05m

2 stops

12:25 pm - 5:40 pm

GEG

LHR

21h 15m

2 stops

$811Lufthansa

Mon, Apr 27 - Mon, May 4

1:00 pm - 11:02 pm

LGW

BOI

17h 02m

2 stops

2:57 pm - 2:40 pm

BOI

LGW

16h 43m

2 stops

$819Multiple Airlines

Thu, Apr 30 - Thu, May 7

10:20 am - 10:25 pm

LGW

GEG

20h 05m

1 stop

5:47 pm - 10:55 am

GEG

LGW

33h 08m

1 stop

$958Multiple Airlines

Thu, Sep 3 - Sun, Sep 13

3:40 pm - 9:31 pm

LGW

GEG

37h 51m

2 stops

9:55 am - 2:40 pm

GEG

LGW

20h 45m

2 stops

$1,002Icelandair

Mon, Apr 27 - Mon, May 4

3:40 pm - 9:31 pm

LGW

GEG

37h 51m

2 stops

6:00 am - 2:40 pm

GEG

LGW

24h 40m

2 stops

$1,004Icelandair

Sat, May 2 - Sat, May 9

11:45 am - 9:42 pm

LHR

SUN

16h 57m

2 stops

3:34 pm - 6:45 am

SUN

LHR

32h 11m

2 stops

$1,011Virgin Atlantic

Wed, Apr 29 - Wed, May 6

10:55 am - 9:42 pm

LHR

SUN

17h 47m

1 stop

3:34 pm - 1:15 pm

SUN

LHR

14h 41m

2 stops

$1,022Virgin Atlantic

Wed, Apr 29 - Wed, May 6

United Airlines flights from London to Idaho

Our best United Airlines deals on London to Idaho flight tickets

United Airlines

Apr 27

LHR1:00 pmLondon Heathrow

15h 17m

1 stop

BOI9:17 pmBoise Air Term. Gowen Fld

May 3

BOI8:34 amBoise Air Term. Gowen Fld

15h 11m

1 stop

LHR6:45 amLondon Heathrow

$675

United Airlines

May 4

LHR8:40 amLondon Heathrow

21h 00m

2 stops

GEG9:40 pmSpokane

May 10

GEG4:10 pmSpokane

33h 30m

1 stop

LHR9:40 amLondon Heathrow

$816

United Airlines

Apr 20

LHR7:25 amLondon Heathrow

19h 28m

2 stops

BOI7:53 pmBoise Air Term. Gowen Fld

Apr 27

BOI6:15 amBoise Air Term. Gowen Fld

18h 00m

2 stops

LHR7:15 amLondon Heathrow

$820

Lufthansa flights from London to Idaho

Our best Lufthansa deals on London to Idaho flight tickets

Lufthansa

Apr 27

LHR6:30 amLondon Heathrow

23h 05m

2 stops

GEG9:35 pmSpokane

May 4

GEG12:25 pmSpokane

17h 45m

1 stop

LHR2:10 pmLondon Heathrow

$806

Lufthansa

Apr 27

LHR7:30 amLondon Heathrow

22h 05m

2 stops

GEG9:35 pmSpokane

May 4

GEG12:25 pmSpokane

21h 15m

2 stops

LHR5:40 pmLondon Heathrow

$811

Lufthansa

Apr 27

LHR7:25 amLondon Heathrow

21h 46m

2 stops

GEG9:11 pmSpokane

May 4

GEG12:25 pmSpokane

14h 45m

1 stop

LHR11:10 amLondon Heathrow

$812

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 4/27

1:00 pm-9:17 pm

1 stop15h 17m

Boise Air Term. Gowen Fld

Sun 5/3

8:34 am-6:45 am

1 stop15h 11m

$675

Quickest round-trip

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/31

5:45 pm-10:50 pm

1 stop13h 05m

Spokane

Mon 4/20

3:30 pm-3:35 pm

1 stop16h 05m

$786

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/27

6:30 am-9:35 pm

2 stops23h 05m

Spokane

Mon 5/4

12:25 pm-2:10 pm

1 stop17h 45m

$806

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 4/27

7:30 am-9:35 pm

2 stops22h 05m

Spokane

Mon 5/4

12:25 pm-5:40 pm

2 stops21h 15m

$811

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Thu 4/30

1:00 pm-11:02 pm

2 stops17h 02m

Boise Air Term. Gowen Fld

Thu 5/7

2:57 pm-2:40 pm

2 stops16h 43m

$819

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Thu 9/3

10:20 am-10:25 pm

1 stop20h 05m

Spokane

Sun 9/13

5:47 pm-10:55 am

1 stop33h 08m

$958

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Mon 4/27

3:40 pm-9:31 pm

2 stops37h 51m

Spokane

Mon 5/4

9:55 am-2:40 pm

2 stops20h 45m

$1,002

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Sat 5/2

3:40 pm-9:31 pm

2 stops37h 51m

Spokane

Sat 5/9

6:00 am-2:40 pm

2 stops24h 40m

$1,004

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Wed 4/29

11:45 am-9:42 pm

2 stops16h 57m

Hailey Sun Valley-Friedman

Wed 5/6

3:34 pm-6:45 am

2 stops32h 11m

$1,011

LondonHailey

LHR - SUN

LHRSUN

London Heathrow

Wed 4/29

10:55 am-9:42 pm

1 stop17h 47m

Hailey Sun Valley-Friedman

Wed 5/6

3:34 pm-1:15 pm

2 stops14h 41m

$1,022

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 London 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

What is the cheapest month to fly to Idaho?

In general, January is the cheapest month to fly from London to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $753. If you don’t want to visit Idaho in January, then you should wait until September to fly from London, when ticket prices are also cheap, with an average price of $791.

Can stopping save me money on London to Idaho flights?

You could potentially save up to 18% on your flight if you consider stops on a London to Idaho flight.

Cheap London to Idaho flight deals and tips

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

Fastest flight time	13h 45m
Direct flights	None

The fastest flight from London to Idaho takes 13h 45m

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

Search flight deals

When did momondo last update prices for flights from London to Idaho?
Prices for flights from London to Idaho refresh daily.
How old do you have to be to fly from London 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 from London to Idaho.
What documentation or ID do you need to fly to Idaho?
The required travel and health documents for your Idaho trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from London to Idaho?

It is quick and easy to find London to Idaho flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Idaho that suits you.

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

Flights from London to Idaho with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to Idaho?

momondo provides multiple filters to help you find the best flight to Idaho from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from London 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.