How long does it take to fly to London?

If you’re flying from a popular airport in Idaho, such as Idaho Falls or Lewiston, and flying into London, then you can expect flight times to average 11h 50m and 13h 36m, respectively.

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 34% of people opting to fly with this airline when traveling to London. Keep in mind that there are 5 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

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

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 November 2025.

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.

$274 Cheap Flights from Idaho to London in 2025/26

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1:46 pm - 10:30 amBOI-LHR

13h 44m1 stop

2:45 pm - 9:58 pmLHR-BOI

14h 13m1 stop

$568Virgin Atlantic

Find Deal

Tue, Feb 17 - Thu, Feb 26

1:46 pm - 12:50 pmBOI-LHR

16h 04m1 stop

11:05 am - 8:57 pmLHR-BOI

16h 52m1 stop

$569Virgin Atlantic

Find Deal

Tue, Feb 17 - Thu, Feb 26

6:00 am - 10:00 amGEG-LHR

20h 00m1 stop

6:30 am - 6:55 pmLHR-GEG

20h 25m2 stops

$590Delta

Find Deal

Mon, Nov 24 - Wed, Dec 10

6:30 am - 7:05 amGEG-LHR

16h 35m1 stop

6:30 am - 3:00 pmLHR-GEG

16h 30m2 stops

$591KLM

Find Deal

Wed, Jan 21 - Fri, Jan 30

5:00 am - 10:00 amGEG-LHR

21h 00m2 stops

6:30 am - 2:55 pmLHR-GEG

16h 25m2 stops

$594Delta

Find Deal

Mon, Nov 24 - Thu, Dec 11

6:00 am - 10:00 amGEG-LHR

20h 00m1 stop

11:05 am - 8:10 pmLHR-GEG

17h 05m1 stop

$596KLM

Find Deal

Wed, Nov 26 - Fri, Dec 12

11:19 am - 10:30 amGEG-LHR

15h 11m1 stop

10:45 am - 6:47 pmLHR-GEG

16h 02m2 stops

$608Air France

Find Deal

Mon, Feb 16 - Wed, Mar 4

5:00 am - 5:55 amBOI-LHR

17h 55m2 stops

11:10 am - 11:48 pmLHR-BOI

19h 38m2 stops

$628United Airlines

Find Deal

Tue, Feb 17 - Fri, Feb 27

5:00 am - 5:55 amBOI-LHR

17h 55m2 stops

11:10 am - 11:48 pmLHR-BOI

19h 38m2 stops

$630United Airlines

Find Deal

Tue, Feb 17 - Fri, Feb 27

5:35 am - 7:05 amBOI-LHR

18h 30m1 stop

11:20 am - 10:05 pmLHR-BOI

17h 45m1 stop

$646Air France

Find Deal

Thu, Dec 11 - Sun, Dec 14

Virgin Atlantic flights from Idaho to London

Our best Virgin Atlantic deals on Idaho to London flight tickets

Virgin Atlantic

Feb 17

BOI1:46 pmBoise Air Term. Gowen Fld

13h 44m

1 stop

LHR10:30 amLondon Heathrow

Feb 26

LHR2:45 pmLondon Heathrow

14h 13m

1 stop

BOI9:58 pmBoise Air Term. Gowen Fld

$568

Find similar

Virgin Atlantic

Feb 17

BOI1:46 pmBoise Air Term. Gowen Fld

16h 04m

1 stop

LHR12:50 pmLondon Heathrow

Feb 26

LHR11:05 amLondon Heathrow

16h 52m

1 stop

BOI8:57 pmBoise Air Term. Gowen Fld

$569

Find similar

Virgin Atlantic

Dec 10

BOI5:35 amBoise Air Term. Gowen Fld

18h 15m

2 stops

LHR6:50 amLondon Heathrow

Dec 18

LHR11:05 amLondon Heathrow

19h 54m

2 stops

BOI11:59 pmBoise Air Term. Gowen Fld

$600

Find similar

Delta flights from Idaho to London

Our best Delta deals on Idaho to London flight tickets

Delta

Nov 12

GEG6:00 amSpokane

20h 30m

1 stop

LHR10:30 amLondon Heathrow

Dec 3

LHR6:20 amLondon Heathrow

21h 50m

2 stops

GEG8:10 pmSpokane

$589

Find similar

Delta

Nov 24

GEG6:00 amSpokane

20h 00m

1 stop

LHR10:00 amLondon Heathrow

Dec 10

LHR6:30 amLondon Heathrow

20h 25m

2 stops

GEG6:55 pmSpokane

$590

Find similar

Delta

Nov 12

GEG6:00 amSpokane

18h 45m

2 stops

LHR8:45 amLondon Heathrow

Dec 3

LHR6:20 amLondon Heathrow

21h 50m

2 stops

GEG8:10 pmSpokane

$593

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

1:46 pm-10:30 am

1 stop13h 44m

London Heathrow

Thu 2/26

2:45 pm-9:58 pm

1 stop14h 13m

$568

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

1:46 pm-12:50 pm

1 stop16h 04m

London Heathrow

Thu 2/26

11:05 am-8:57 pm

1 stop16h 52m

$569

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 11/24

6:00 am-10:00 am

1 stop20h 00m

London Heathrow

Wed 12/10

6:30 am-6:55 pm

2 stops20h 25m

$590

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 1/21

6:30 am-7:05 am

1 stop16h 35m

London Heathrow

Fri 1/30

6:30 am-3:00 pm

2 stops16h 30m

$591

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 11/24

5:00 am-10:00 am

2 stops21h 00m

London Heathrow

Thu 12/11

6:30 am-2:55 pm

2 stops16h 25m

$594

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 11/26

6:00 am-10:00 am

1 stop20h 00m

London Heathrow

Fri 12/12

11:05 am-8:10 pm

1 stop17h 05m

$596

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mon 2/16

11:19 am-10:30 am

1 stop15h 11m

London Heathrow

Wed 3/4

10:45 am-6:47 pm

2 stops16h 02m

$608

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

5:00 am-5:55 am

2 stops17h 55m

London Heathrow

Fri 2/27

11:10 am-11:48 pm

2 stops19h 38m

$628

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

5:00 am-5:55 am

2 stops17h 55m

London Heathrow

Fri 2/27

11:10 am-11:48 pm

2 stops19h 38m

$630

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Thu 12/11

5:35 am-7:05 am

1 stop18h 30m

London Heathrow

Sun 12/14

11:20 am-10:05 pm

1 stop17h 45m

$646

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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 $662, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Idaho averaging around $789.

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

The cheapest day to depart from Idaho to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $801. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $975. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from Idaho in the morning is the least expensive time of day to depart. momondo users have found prices as low as $864 when looking at flights departing in the morning. Flights to London are more costly in the evening, with an average ticket price of $1,103. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to London from Idaho when booking week ahead of your departure date. In general, you can expect to find flights to London for around $943 when searching week out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Idaho for as low as $625 on momondo.

Can stopping save me money on Idaho to London flights?

You could potentially save up to 8% 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

Direct flights	None

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 November 2025.
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 1,410 reviews	Search KLM flights
United Airlines	PriceFrom $639	Free Cancellation	Rating 7.4 9,012 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom $695	Free Cancellation	Rating 7.5 672 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $701	Free Cancellation	Rating 7.9 8,004 reviews	Search Delta flights
American Airlines	PriceFrom $703	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights

Gatwick

Hounslow

Milton Keynes

Dover

Luton

Slough

Guildford

Hayes

Dartford

Crawley

Brentwood

Chelmsford

Wembley

Folkestone

Romford

Ilford

Cobham

Stansted

Harrow

Watford

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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Find better results for your trip to the United Kingdom

Cheap flights from Idaho to London from $274

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 1/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

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Trusted and free

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Price Alerts

Find the cheapest flights from Idaho to London

Cheap round-trip flights

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Virgin Atlantic flights from Idaho to London

Our best Virgin Atlantic deals on Idaho to London flight tickets

Delta flights from Idaho to London

Our best Delta deals on Idaho to London flight tickets

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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

What is the cheapest month to fly to London?

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

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

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

Can stopping save me money on Idaho to London flights?

You could potentially save up to 8% on your flight if you consider stops on a Idaho to London flight.

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

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

What airlines fly to London?

How long does it take to fly to London?

If you’re flying from a popular airport in Idaho, such as Idaho Falls or Lewiston, and flying into London, then you can expect flight times to average 11h 50m and 13h 36m, respectively.

Cheap Idaho to London flight deals and tips

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

Direct flights

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

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

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

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

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