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

Lufthansa, Air Canada, and United 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.

$521 Cheap Flights from London to Idaho in 2025/26

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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.

12:15 pm - 11:01 pm

LHR

BOI

17h 46m2 stops

9:02 am - 10:50 am

BOI

LHR

18h 48m2 stops

$655Multiple Airlines

Sat, Jan 31 - Sat, Feb 7

12:15 pm - 9:25 pm

LHR

GEG

17h 10m2 stops

7:30 am - 7:30 pm

GEG

LHR

28h 00m2 stops

$672Multiple Airlines

Thu, Jan 15 - Thu, Jan 22

6:35 am - 9:29 pm

LHR

BOI

20h 54m2 stops

2:40 pm - 5:05 pm

BOI

LHR

19h 25m2 stops

$739Lufthansa

Tue, Mar 10 - Tue, Mar 31

6:35 am - 9:03 pm

LHR

GEG

21h 28m2 stops

6:00 am - 6:40 am

GEG

LHR

17h 40m2 stops

$746United Airlines

Tue, Mar 10 - Tue, Mar 17

4:35 pm - 9:12 pm

LHR

GEG

35h 37m2 stops

6:00 am - 8:15 am

GEG

LHR

19h 15m1 stop

$747Iberia

Tue, Mar 10 - Tue, Mar 17

7:40 am - 9:29 pm

LHR

BOI

19h 49m2 stops

10:35 am - 9:40 am

BOI

LHR

16h 05m1 stop

$748Lufthansa

Tue, Mar 10 - Tue, Mar 31

6:35 am - 9:18 pm

LHR

GEG

21h 43m2 stops

6:00 am - 6:20 am

GEG

LHR

17h 20m2 stops

$748United Airlines

Tue, Mar 10 - Tue, Mar 17

4:30 pm - 9:12 pm

LHR

GEG

35h 42m1 stop

6:00 am - 6:50 am

GEG

LHR

17h 50m1 stop

$753Iberia

Tue, Mar 10 - Tue, Mar 17

11:55 am - 9:37 pm

LGW

GEG

16h 42m2 stops

12:00 pm - 10:55 am

GEG

LGW

15h 55m2 stops

$832Icelandair

Tue, Mar 10 - Tue, Mar 17

3:40 pm - 10:21 pm

LGW

BOI

37h 41m2 stops

5:30 pm - 2:40 pm

BOI

LGW

38h 10m2 stops

$855Icelandair

Mon, Apr 20 - Mon, Apr 27

Scandinavian Airlines flights from London to Idaho

Our best Scandinavian Airlines deals on London to Idaho flight tickets

Scandinavian Airlines

Apr 20

LHR6:40 pmLondon Heathrow

35h 24m

2 stops

BOI11:04 pmBoise Air Term. Gowen Fld

Apr 27

BOI1:00 pmBoise Air Term. Gowen Fld

44h 00m

2 stops

LHR4:00 pmLondon Heathrow

$805

Find similar

Scandinavian Airlines

Apr 20

LHR5:00 pmLondon Heathrow

37h 04m

2 stops

BOI11:04 pmBoise Air Term. Gowen Fld

Apr 27

BOI1:00 pmBoise Air Term. Gowen Fld

44h 00m

2 stops

LHR4:00 pmLondon Heathrow

$807

Find similar

Scandinavian Airlines

Apr 20

LHR10:20 amLondon Heathrow

19h 44m

2 stops

BOI11:04 pmBoise Air Term. Gowen Fld

Apr 27

BOI1:00 pmBoise Air Term. Gowen Fld

25h 35m

3 stops

LHR9:35 pmLondon Heathrow

$857

Find similar

Air Canada flights from London to Idaho

Our best Air Canada deals on London to Idaho flight tickets

Air Canada

Mar 7

LHR2:30 pmLondon Heathrow

39h 27m

2 stops

BOI10:57 pmBoise Air Term. Gowen Fld

Mar 14

BOI5:30 pmBoise Air Term. Gowen Fld

31h 40m

2 stops

LHR7:10 amLondon Heathrow

$1,088

Find similar

Air Canada

Mar 7

LHR2:30 pmLondon Heathrow

39h 27m

2 stops

BOI10:57 pmBoise Air Term. Gowen Fld

Mar 14

BOI5:00 amBoise Air Term. Gowen Fld

21h 30m

2 stops

LHR8:30 amLondon Heathrow

$1,100

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Sat 1/31

12:15 pm-11:01 pm

2 stops17h 46m

Boise Air Term. Gowen Fld

Sat 2/7

9:02 am-10:50 am

2 stops18h 48m

$655

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Thu 1/15

12:15 pm-9:25 pm

2 stops17h 10m

Spokane

Thu 1/22

7:30 am-7:30 pm

2 stops28h 00m

$672

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 3/10

6:35 am-9:29 pm

2 stops20h 54m

Boise Air Term. Gowen Fld

Tue 3/31

2:40 pm-5:05 pm

2 stops19h 25m

$739

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/10

6:35 am-9:03 pm

2 stops21h 28m

Spokane

Tue 3/17

6:00 am-6:40 am

2 stops17h 40m

$746

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/10

4:35 pm-9:12 pm

2 stops35h 37m

Spokane

Tue 3/17

6:00 am-8:15 am

1 stop19h 15m

$747

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 3/10

7:40 am-9:29 pm

2 stops19h 49m

Boise Air Term. Gowen Fld

Tue 3/31

10:35 am-9:40 am

1 stop16h 05m

$748

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/10

6:35 am-9:18 pm

2 stops21h 43m

Spokane

Tue 3/17

6:00 am-6:20 am

2 stops17h 20m

$748

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Tue 3/10

4:30 pm-9:12 pm

1 stop35h 42m

Spokane

Tue 3/17

6:00 am-6:50 am

1 stop17h 50m

$753

LondonSpokane

LGW - GEG

LGWGEG

London Gatwick

Tue 3/10

11:55 am-9:37 pm

2 stops16h 42m

Spokane

Tue 3/17

12:00 pm-10:55 am

2 stops15h 55m

$832

LondonBoise

LGW - BOI

LGWBOI

London Gatwick

Mon 4/20

3:40 pm-10:21 pm

2 stops37h 41m

Boise Air Term. Gowen Fld

Mon 4/27

5:30 pm-2:40 pm

2 stops38h 10m

$855

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, 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 $790. 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 $1,006 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 $766 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

Fastest flight time	14h 17m
Direct flights	None

The fastest flight from London to Idaho takes 14h 17m

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.