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

WestJet, Lufthansa, and Alaska Airlines 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.

$550 Cheap Flights from London to Idaho in 2026

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.

6:40 am - 6:40 pm

LHR

BOI

19h 00m

2 stops

4:00 pm - 4:00 pm

BOI

LHR

41h 00m

2 stops

$760Scandinavian Airlines

Fri, Sep 11 - Fri, Sep 18

6:40 am - 5:09 pm

LHR

GEG

18h 29m

2 stops

11:10 am - 4:00 pm

GEG

LHR

20h 50m

2 stops

$762Scandinavian Airlines

Sat, Sep 12 - Sat, Sep 19

6:40 am - 10:34 pm

LHR

BOI

22h 54m

2 stops

10:34 am - 5:40 pm

BOI

LHR

24h 06m

2 stops

$773Scandinavian Airlines

Fri, Sep 11 - Sat, Sep 26

6:40 am - 5:09 pm

LHR

GEG

18h 29m

2 stops

1:00 pm - 4:25 pm

GEG

LHR

19h 25m

3 stops

$777Scandinavian Airlines

Sat, Sep 12 - Sat, Sep 19

6:40 am - 10:34 pm

LHR

BOI

22h 54m

3 stops

10:34 am - 5:40 pm

BOI

LHR

24h 06m

2 stops

$780Scandinavian Airlines

Fri, Sep 11 - Sat, Sep 26

6:40 am - 10:34 pm

LHR

BOI

22h 54m

2 stops

10:34 am - 4:25 pm

BOI

LHR

22h 51m

3 stops

$784Scandinavian Airlines

Fri, Sep 11 - Sat, Sep 26

6:40 am - 7:14 pm

LHR

GEG

20h 34m

2 stops

1:00 pm - 1:35 pm

GEG

LHR

16h 35m

2 stops

$787Scandinavian Airlines

Fri, Aug 28 - Fri, Sep 11

6:40 am - 10:54 pm

LHR

BOI

23h 14m

2 stops

4:14 pm - 4:00 pm

BOI

LHR

40h 46m

2 stops

$787Scandinavian Airlines

Fri, Dec 4 - Mon, Dec 7

6:40 am - 10:54 pm

LHR

BOI

23h 14m

2 stops

4:14 pm - 4:00 pm

BOI

LHR

40h 46m

2 stops

$788Scandinavian Airlines

Fri, Dec 4 - Mon, Dec 7

9:05 pm - 6:40 pm

LHR

BOI

28h 35m

3 stops

12:17 pm - 4:25 pm

BOI

LHR

21h 08m

3 stops

$791Scandinavian Airlines

Fri, Sep 11 - Sat, Sep 26

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United Airlines flights from London to Idaho

Our best United Airlines deals on London to Idaho flight tickets

United Airlines

Oct 27

LHR11:05 amLondon Heathrow

41h 46m

2 stops

BOI10:51 pmBoise Air Term. Gowen Fld

Nov 10

BOI12:00 pmBoise Air Term. Gowen Fld

34h 55m

2 stops

LHR5:55 amLondon Heathrow

$897

United Airlines

Oct 6

LHR8:00 amLondon Heathrow

22h 59m

2 stops

BOI11:59 pmBoise Air Term. Gowen Fld

Oct 13

BOI2:20 pmBoise Air Term. Gowen Fld

13h 50m

1 stop

LHR11:10 amLondon Heathrow

$913

United Airlines

Sep 8

LHR2:50 pmLondon Heathrow

36h 01m

2 stops

GEG6:51 pmSpokane

Sep 16

GEG1:09 pmSpokane

14h 01m

1 stop

LHR11:10 amLondon Heathrow

$914

Icelandair flights from London to Idaho

Our best Icelandair deals on London to Idaho flight tickets

Icelandair

Sep 8

LGW1:00 pmLondon Gatwick

40h 48m

2 stops

GEG9:48 pmSpokane

Oct 6

GEG4:41 pmSpokane

13h 59m

2 stops

LGW2:40 pmLondon Gatwick

$977

Icelandair

Sep 8

LGW3:40 pmLondon Gatwick

16h 19m

2 stops

GEG11:59 pmSpokane

Oct 6

GEG4:41 pmSpokane

13h 59m

2 stops

LGW2:40 pmLondon Gatwick

$1,001

Icelandair

Sep 8

LGW3:40 pmLondon Gatwick

16h 19m

2 stops

GEG11:59 pmSpokane

Oct 6

GEG4:41 pmSpokane

13h 59m

2 stops

LGW2:40 pmLondon Gatwick

$1,011

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 9/11

6:40 am-6:40 pm

2 stops19h 00m

Boise Air Term. Gowen Fld

Fri 9/18

4:00 pm-4:00 pm

2 stops41h 00m

$760

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sat 9/12

6:40 am-5:09 pm

2 stops18h 29m

Spokane

Sat 9/19

11:10 am-4:00 pm

2 stops20h 50m

$762

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 9/11

6:40 am-10:34 pm

2 stops22h 54m

Boise Air Term. Gowen Fld

Sat 9/26

10:34 am-5:40 pm

2 stops24h 06m

$773

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sat 9/12

6:40 am-5:09 pm

2 stops18h 29m

Spokane

Sat 9/19

1:00 pm-4:25 pm

3 stops19h 25m

$777

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 9/11

6:40 am-10:34 pm

3 stops22h 54m

Boise Air Term. Gowen Fld

Sat 9/26

10:34 am-5:40 pm

2 stops24h 06m

$780

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 9/11

6:40 am-10:34 pm

2 stops22h 54m

Boise Air Term. Gowen Fld

Sat 9/26

10:34 am-4:25 pm

3 stops22h 51m

$784

Quickest round-trip

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Fri 8/28

6:40 am-7:14 pm

2 stops20h 34m

Spokane

Fri 9/11

1:00 pm-1:35 pm

2 stops16h 35m

$787

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 12/4

6:40 am-10:54 pm

2 stops23h 14m

Boise Air Term. Gowen Fld

Mon 12/7

4:14 pm-4:00 pm

2 stops40h 46m

$787

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 12/4

6:40 am-10:54 pm

2 stops23h 14m

Boise Air Term. Gowen Fld

Mon 12/7

4:14 pm-4:00 pm

2 stops40h 46m

$788

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 9/11

9:05 pm-6:40 pm

3 stops28h 35m

Boise Air Term. Gowen Fld

Sat 9/26

12:17 pm-4:25 pm

3 stops21h 08m

$791

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 $765. If you don’t want to visit Idaho in January, then you should wait until April to fly from London, when ticket prices are also cheap, with an average price of $843.

Can stopping save me money on London to Idaho flights?

You could potentially save up to 15% 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	12h 50m
Direct flights	None

The fastest flight from London to Idaho takes 12h 50m

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

Search flight deals

Frequently asked questions about flying 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.

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.