How long does it take to fly to London?

If you’re flying from a popular airport in Idaho, such as Boise or Idaho Falls, and flying into London, then you can expect flight times to average 12h 03m and 12h 09m, respectively.

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

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

What airlines fly to London?

United Airlines, Delta and Virgin Atlantic are the top three most popular airlines that fly to London from Idaho according to our data. United Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to London. Keep in mind that there are 4 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Idaho to London refresh daily.

How many operators does momondo search for flights from Idaho to London?

The number of operators available for flights from Idaho to London is 5 as of February 2026.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to London.

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

The travel and health documents required for your trip to London can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$357 Cheap Flights from Idaho to London in 2026

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Find the cheapest flights from Idaho to London

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

10:49 am - 7:25 am

BOI

LHR

14h 36m

1 stop

6:50 am - 10:56 pm

LHR

BOI

22h 06m

2 stops

$632United Airlines

Wed, Mar 11 - Mon, Mar 16

5:00 am - 5:55 am

BOI

LHR

18h 55m

2 stops

7:40 am - 5:46 pm

LHR

BOI

40h 06m

2 stops

$636United Airlines

Wed, Mar 11 - Mon, Mar 16

2:37 pm - 5:40 pm

BOI

LHR

20h 03m

2 stops

7:30 am - 9:22 pm

LHR

BOI

20h 52m

2 stops

$646Lufthansa

Wed, Apr 15 - Wed, Apr 22

6:09 am - 3:35 pm

LWS

LHR

25h 26m

1 stop

9:55 am - 12:08 am

LHR

LWS

22h 13m

2 stops

$647Scandinavian Airlines

Wed, Apr 29 - Wed, May 6

7:05 am - 10:15 am

BOI

LHR

20h 10m

1 stop

6:30 am - 4:14 pm

LHR

BOI

16h 44m

2 stops

$648Delta

Sun, Apr 5 - Tue, Apr 21

7:38 pm - 3:35 pm

GEG

LHR

11h 57m

1 stop

8:40 am - 9:13 pm

LHR

GEG

20h 33m

2 stops

$648Delta

Sun, Apr 26 - Fri, May 15

6:00 am - 11:20 am

GEG

LHR

22h 20m

2 stops

1:25 pm - 9:59 pm

LHR

GEG

39h 34m

2 stops

$649Air Canada

Sun, Mar 8 - Sun, Mar 15

7:10 am - 8:35 am

GEG

LHR

17h 25m

2 stops

2:05 pm - 6:36 pm

LHR

GEG

36h 31m

2 stops

$657Air Canada

Wed, Apr 22 - Fri, May 8

7:05 am - 4:50 pm

BOI

LHR

27h 45m

1 stop

2:30 pm - 10:04 pm

LHR

BOI

13h 34m

1 stop

$660Scandinavian Airlines

Wed, Mar 11 - Mon, Mar 16

12:35 pm - 5:55 pm

GEG

LCY

45h 20m

2 stops

9:15 am - 9:16 pm

LCY

GEG

20h 01m

2 stops

$710Lufthansa

Tue, May 5 - Tue, May 19

Air Canada flights from Idaho to London

Our best Air Canada deals on Idaho to London flight tickets

Air Canada

Mar 8

GEG6:00 amSpokane

22h 20m

2 stops

LHR11:20 amLondon Heathrow

Mar 15

LHR1:25 pmLondon Heathrow

39h 34m

2 stops

GEG9:59 pmSpokane

$649

Air Canada

Apr 22

GEG7:10 amSpokane

17h 25m

2 stops

LHR8:35 amLondon Heathrow

May 8

LHR2:05 pmLondon Heathrow

36h 31m

2 stops

GEG6:36 pmSpokane

$657

Air Canada

Apr 25

GEG7:10 amSpokane

39h 20m

2 stops

LHR6:30 amLondon Heathrow

May 8

LHR2:05 pmLondon Heathrow

36h 31m

2 stops

GEG6:36 pmSpokane

$660

United Airlines flights from Idaho to London

Our best United Airlines deals on Idaho to London flight tickets

United Airlines

Mar 11

BOI10:49 amBoise Air Term. Gowen Fld

14h 36m

1 stop

LHR7:25 amLondon Heathrow

Mar 16

LHR6:50 amLondon Heathrow

22h 06m

2 stops

BOI10:56 pmBoise Air Term. Gowen Fld

$632

United Airlines

Mar 11

BOI5:00 amBoise Air Term. Gowen Fld

18h 55m

2 stops

LHR5:55 amLondon Heathrow

Mar 16

LHR7:40 amLondon Heathrow

40h 06m

2 stops

BOI5:46 pmBoise Air Term. Gowen Fld

$636

United Airlines

Mar 8

GEG6:00 amSpokane

18h 55m

1 stop

LHR7:55 amLondon Heathrow

Mar 15

LHR4:40 pmLondon Heathrow

51h 01m

2 stops

GEG12:41 pmSpokane

$643

Fly from

Fly to

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/11

10:49 am-7:25 am

1 stop14h 36m

London Heathrow

Mon 3/16

6:50 am-10:56 pm

2 stops22h 06m

$632

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/11

5:00 am-5:55 am

2 stops18h 55m

London Heathrow

Mon 3/16

7:40 am-5:46 pm

2 stops40h 06m

$636

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 4/15

2:37 pm-5:40 pm

2 stops20h 03m

London Heathrow

Wed 4/22

7:30 am-9:22 pm

2 stops20h 52m

$646

LewistonLondon

LWS - LHR

LWSLHR

Lewiston Nez Perce Rgnl

Wed 4/29

6:09 am-3:35 pm

1 stop25h 26m

London Heathrow

Wed 5/6

9:55 am-12:08 am

2 stops22h 13m

$647

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 4/5

7:05 am-10:15 am

1 stop20h 10m

London Heathrow

Tue 4/21

6:30 am-4:14 pm

2 stops16h 44m

$648

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 4/26

7:38 pm-3:35 pm

1 stop11h 57m

London Heathrow

Fri 5/15

8:40 am-9:13 pm

2 stops20h 33m

$648

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 3/8

6:00 am-11:20 am

2 stops22h 20m

London Heathrow

Sun 3/15

1:25 pm-9:59 pm

2 stops39h 34m

$649

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 4/22

7:10 am-8:35 am

2 stops17h 25m

London Heathrow

Fri 5/8

2:05 pm-6:36 pm

2 stops36h 31m

$657

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 3/11

7:05 am-4:50 pm

1 stop27h 45m

London Heathrow

Mon 3/16

2:30 pm-10:04 pm

1 stop13h 34m

$660

SpokaneLondon

GEG - LCY

GEGLCY

Spokane

Tue 5/5

12:35 pm-5:55 pm

2 stops45h 20m

London City

Tue 5/19

9:15 am-9:16 pm

2 stops20h 01m

$710

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How to get the cheapest flight ticket from Idaho to London

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 London?

The cheapest month to fly to London from Idaho is in October. Flight prices, which tend to average around $697, are often lower during this time because this is during the off-season. The month of April is another great option to travel to London, with average flight prices from Idaho averaging around $712.

Can stopping save me money on Idaho to London flights?

You could potentially save up to 4% on your flight if you consider stops on a Idaho to London flight.

Cheap Idaho to London flight deals and tips

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

Fastest flight time	11h 51m
Direct flights	None

The fastest flight from Idaho to London takes 11h 51m

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

Search flight deals

When did momondo last update prices for flights from Idaho to London?
Prices for flights from Idaho to London refresh daily.
How many operators does momondo search for flights from Idaho to London?
The number of operators available for flights from Idaho to London is 5 as of February 2026.
How old do you have to be to fly from Idaho to London?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to London.
What documentation or ID do you need to fly to London?
The travel and health documents required for your trip to London can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Idaho to London

Compare and see reviews for airlines that fly from Idaho to London with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $577	Free Cancellation	Rating 7.7 1,451 reviews	Search KLM flights
Virgin Atlantic	PriceFrom $604	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
United Airlines	PriceFrom $639	Free Cancellation	Rating 7.4 9,274 reviews	Search United Airlines flights
Delta	PriceFrom $701	Free Cancellation	Rating 7.9 8,175 reviews	Search Delta flights

Gatwick

Hounslow

Milton Keynes

Luton

Dover

Slough

Crawley

Hayes

Wembley

Dartford

Croydon

Brentwood

Guildford

Harrow

Watford

Cobham

Folkestone

Romford

Stansted

Richmond

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Idaho to London for you.

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

Yes. All flights to London from Idaho on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential Idaho to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to London from Idaho. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from Idaho to London from $357

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho to London departing on 3/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from Idaho to London

Our best Air Canada deals on Idaho to London flight tickets

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Our best United Airlines deals on Idaho to London flight tickets

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How to get the cheapest flight ticket from Idaho to London

What is the cheapest month to fly to London?

Can stopping save me money on Idaho to London flights?

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

What airlines fly to London?

How long does it take to fly to London?

Cheap Idaho to London flight deals and tips

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

Fastest flight time

Direct flights

Best airlines flying from Idaho to London

Compare and see reviews for airlines that fly from Idaho to London with momondo

Traveling to a place near London?

Why use momondo?

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

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

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

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

An easier way to manage your London trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London

Fly your favorite airline to London

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Idaho

According to popular flight searches on momondo this year

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