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

Delta, KLM, 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.

$369 Cheap Flights from London to Idaho in 2025/26

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Find the cheapest flights from London to Idaho

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One-way

Cheap round-trip flights

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11:55 am - 11:01 pmLGW-BOI

18h 06m2 stops

9:50 am - 10:55 amBOI-LGW

18h 05m2 stops

$682Multiple Airlines

Find Deal

Mon, Feb 9 - Mon, Feb 16

7:40 am - 9:59 amLHR-BOI

33h 19m2 stops

1:50 pm - 1:30 pmBOI-LHR

16h 40m1 stop

$725United Airlines

Find Deal

Mon, Dec 8 - Mon, Dec 15

7:40 am - 6:07 pmLHR-BOI

17h 27m2 stops

2:49 pm - 10:50 amBOI-LHR

37h 01m2 stops

$747Lufthansa

Find Deal

Tue, Dec 9 - Sun, Dec 14

7:40 am - 7:43 pmLHR-BOI

19h 03m2 stops

2:49 pm - 5:55 amBOI-LHR

32h 06m2 stops

$749Lufthansa

Find Deal

Tue, Dec 9 - Sun, Dec 14

1:25 pm - 11:25 amLHR-BOI

29h 00m2 stops

5:10 pm - 11:20 amBOI-LHR

35h 10m2 stops

$800Air Canada

Find Deal

Mon, Feb 9 - Sun, Feb 15

11:55 am - 8:59 pmLGW-GEG

16h 04m2 stops

12:44 pm - 10:55 amGEG-LGW

15h 11m2 stops

$800Icelandair

Find Deal

Tue, Mar 10 - Tue, Mar 17

11:55 am - 8:59 pmLGW-GEG

16h 04m2 stops

12:44 pm - 10:55 amGEG-LGW

15h 11m2 stops

$801Icelandair

Find Deal

Tue, Mar 10 - Tue, Mar 17

2:30 pm - 9:11 pmLHR-BOI

37h 41m2 stops

6:25 am - 8:30 amBOI-LHR

19h 05m2 stops

$805Air Canada

Find Deal

Fri, Feb 20 - Mon, Mar 2

6:40 am - 11:04 pmLHR-BOI

23h 24m2 stops

1:00 pm - 9:35 pmBOI-LHR

25h 35m3 stops

$845Scandinavian Airlines

Find Deal

Mon, Apr 20 - Mon, Apr 27

6:40 am - 11:04 pmLHR-BOI

23h 24m3 stops

1:00 pm - 9:35 pmBOI-LHR

25h 35m3 stops

$853Scandinavian Airlines

Find Deal

Mon, Apr 20 - Mon, Apr 27

United Airlines flights from London to Idaho

Our best United Airlines deals on London to Idaho flight tickets

United Airlines

Dec 8

LHR7:40 amLondon Heathrow

33h 19m

2 stops

BOI9:59 amBoise Air Term. Gowen Fld

Dec 15

BOI1:50 pmBoise Air Term. Gowen Fld

16h 40m

1 stop

LHR1:30 pmLondon Heathrow

$725

Find similar

United Airlines

Dec 8

LHR7:40 amLondon Heathrow

33h 19m

2 stops

BOI9:59 amBoise Air Term. Gowen Fld

Dec 15

BOI10:35 amBoise Air Term. Gowen Fld

13h 50m

1 stop

LHR7:25 amLondon Heathrow

$726

Find similar

United Airlines

Dec 8

LHR7:40 amLondon Heathrow

33h 19m

2 stops

BOI9:59 amBoise Air Term. Gowen Fld

Dec 15

BOI2:49 pmBoise Air Term. Gowen Fld

11h 51m

1 stop

LHR9:40 amLondon Heathrow

$727

Find similar

Lufthansa flights from London to Idaho

Our best Lufthansa deals on London to Idaho flight tickets

Lufthansa

Dec 9

LHR7:40 amLondon Heathrow

17h 27m

2 stops

BOI6:07 pmBoise Air Term. Gowen Fld

Dec 14

BOI2:49 pmBoise Air Term. Gowen Fld

37h 01m

2 stops

LHR10:50 amLondon Heathrow

$747

Find similar

Lufthansa

Dec 9

LHR7:40 amLondon Heathrow

19h 03m

2 stops

BOI7:43 pmBoise Air Term. Gowen Fld

Dec 14

BOI2:49 pmBoise Air Term. Gowen Fld

32h 06m

2 stops

LHR5:55 amLondon Heathrow

$749

Find similar

Lufthansa

Apr 20

LHR10:35 amLondon Heathrow

17h 40m

1 stop

BOI9:15 pmBoise Air Term. Gowen Fld

Apr 27

BOI10:39 amBoise Air Term. Gowen Fld

18h 41m

1 stop

LHR12:20 pmLondon Heathrow

$765

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Mon 2/9

11:55 am-11:01 pm

2 stops18h 06m

Boise Air Term. Gowen Fld

Mon 2/16

9:50 am-10:55 am

2 stops18h 05m

$682

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 12/8

7:40 am-9:59 am

2 stops33h 19m

Boise Air Term. Gowen Fld

Mon 12/15

1:50 pm-1:30 pm

1 stop16h 40m

$725

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 12/9

7:40 am-6:07 pm

2 stops17h 27m

Boise Air Term. Gowen Fld

Sun 12/14

2:49 pm-10:50 am

2 stops37h 01m

$747

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 12/9

7:40 am-7:43 pm

2 stops19h 03m

Boise Air Term. Gowen Fld

Sun 12/14

2:49 pm-5:55 am

2 stops32h 06m

$749

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 2/9

1:25 pm-11:25 am

2 stops29h 00m

Boise Air Term. Gowen Fld

Sun 2/15

5:10 pm-11:20 am

2 stops35h 10m

$800

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Tue 3/10

11:55 am-8:59 pm

2 stops16h 04m

Spokane

Tue 3/17

12:44 pm-10:55 am

2 stops15h 11m

$800

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Tue 3/10

11:55 am-8:59 pm

2 stops16h 04m

Spokane

Tue 3/17

12:44 pm-10:55 am

2 stops15h 11m

$801

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Fri 2/20

2:30 pm-9:11 pm

2 stops37h 41m

Boise Air Term. Gowen Fld

Mon 3/2

6:25 am-8:30 am

2 stops19h 05m

$805

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 4/20

6:40 am-11:04 pm

2 stops23h 24m

Boise Air Term. Gowen Fld

Mon 4/27

1:00 pm-9:35 pm

3 stops25h 35m

$845

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 4/20

6:40 am-11:04 pm

3 stops23h 24m

Boise Air Term. Gowen Fld

Mon 4/27

1:00 pm-9:35 pm

3 stops25h 35m

$853

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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, September 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 $792. If you don’t want to visit Idaho in September, then you should wait until February to fly from London, when ticket prices are also cheap, with an average price of $803.

What is the cheapest day to depart on your flight to Idaho?

Our data shows that Thursday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $907. On the other hand, Sunday is the most expensive day to depart from London because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,365.

What is the cheapest time of day to depart on your flight to Idaho?

According to our data, the cheapest time of day to fly to Idaho is at noon. momondo users have found flights departing from London to Idaho at noon for as low as $1,053. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the morning is when there is more demand to fly to Idaho, so prices are often more expensive at around $1,056 per ticket.

How far in advance should I book a flight to Idaho?

You are more likely to see cheaper flights to Idaho from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $935 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from London for as low as $770 on momondo.

Can stopping save me money on London to Idaho flights?

You could potentially save up to 17% 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

Direct flights	None

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.