How long does it take to fly to London?

If you’re flying from a popular airport in Idaho, such as Lewiston or Boise, and flying into London, then you can expect flight times to average 13h 30m and 14h 40m, respectively.

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

Virgin Atlantic, Air Canada, and United Airlines 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 39% 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.

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 August 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.

$303 Cheap Flights from Idaho to London in 2025

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Find the cheapest flights from Idaho to London

Round-trip

One-way

Last minute

Cheap round-trip flights

1:00 pm - 10:00 amGEG-LHR

13h 00m1 stop

6:20 am - 6:47 pmLHR-GEG

20h 27m2 stops

$591Delta

Find Deal

mié., nov. 5 - mié., nov. 19

3:25 pm - 11:20 amGEG-LHR

11h 55m1 stop

10:55 am - 10:30 pmLHR-GEG

19h 35m1 stop

$593Virgin Atlantic

Find Deal

mar., ago. 26 - jue., sep. 4

6:00 am - 6:25 amGEG-LHR

16h 25m2 stops

6:20 am - 6:18 pmLHR-GEG

19h 58m2 stops

$595Delta

Find Deal

mié., nov. 5 - mié., nov. 19

9:45 am - 10:00 amGEG-LHR

16h 15m1 stop

10:45 am - 6:18 pmLHR-GEG

15h 33m1 stop

$598KLM

Find Deal

mié., nov. 5 - mié., nov. 19

7:00 am - 12:20 pmBOI-LHR

22h 20m1 stop

1:25 pm - 11:39 amLHR-BOI

29h 14m2 stops

$604United Airlines

Find Deal

mar., oct. 14 - mar., nov. 11

9:45 am - 10:00 amGEG-LHR

17h 15m1 stop

6:20 am - 2:49 pmLHR-GEG

16h 29m2 stops

$606

Find Deal

mar., oct. 28 - jue., nov. 6

10:40 am - 12:20 pmBOI-LHR

18h 40m1 stop

3:50 pm - 11:31 amLHR-BOI

26h 41m2 stops

$610United Airlines

Find Deal

mié., sep. 3 - mar., sep. 16

3:25 pm - 2:15 pmGEG-LHR

14h 50m1 stop

6:30 am - 2:45 pmLHR-GEG

16h 15m2 stops

$612KLM

Find Deal

mar., ago. 26 - jue., sep. 4

5:15 am - 6:30 amGEG-LHR

17h 15m2 stops

8:05 pm - 9:03 pmLHR-GEG

32h 58m2 stops

$622

Find Deal

mar., ago. 26 - jue., sep. 4

7:00 am - 6:25 amBOI-LHR

16h 25m1 stop

10:30 am - 9:48 pmLHR-BOI

18h 18m1 stop

$627Finnair

Find Deal

mar., sep. 23 - mié., oct. 1

United Airlines flights from Idaho to London

Our best United Airlines deals on Idaho to London flight tickets

United Airlines

Oct 14

BOI7:00 amBoise Air Term. Gowen Fld

22h 20m

1 stop

LHR12:20 pmLondon Heathrow

Nov 11

LHR1:25 pmLondon Heathrow

29h 14m

2 stops

BOI11:39 amBoise Air Term. Gowen Fld

$604

Find similar

United Airlines

Sep 3

BOI10:40 amBoise Air Term. Gowen Fld

18h 40m

1 stop

LHR12:20 pmLondon Heathrow

Sep 16

LHR3:50 pmLondon Heathrow

26h 41m

2 stops

BOI11:31 amBoise Air Term. Gowen Fld

$610

Find similar

United Airlines

Sep 21

BOI10:48 amBoise Air Term. Gowen Fld

15h 52m

1 stop

LHR9:40 amLondon Heathrow

Oct 3

LHR4:00 pmLondon Heathrow

26h 39m

2 stops

BOI11:39 amBoise Air Term. Gowen Fld

$611

Find similar

Air Canada flights from Idaho to London

Our best Air Canada deals on Idaho to London flight tickets

Air Canada

Sep 20

BOI5:39 pmBoise Air Term. Gowen Fld

29h 51m

2 stops

LHR6:30 amLondon Heathrow

Oct 2

LHR5:40 pmLondon Heathrow

32h 07m

2 stops

BOI6:47 pmBoise Air Term. Gowen Fld

$628

Find similar

Air Canada

Sep 9

BOI10:45 amBoise Air Term. Gowen Fld

18h 05m

3 stops

LHR11:50 amLondon Heathrow

Sep 16

LHR8:30 amLondon Heathrow

19h 44m

3 stops

BOI9:14 pmBoise Air Term. Gowen Fld

$644

Find similar

Air Canada

Sep 20

BOI5:39 pmBoise Air Term. Gowen Fld

29h 51m

2 stops

LHR6:30 amLondon Heathrow

Oct 1

LHR2:05 pmLondon Heathrow

26h 37m

2 stops

BOI9:42 amBoise Air Term. Gowen Fld

$649

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mié. 11/5

1:00 pm-10:00 am

1 stop13h 00m

London Heathrow

mié. 11/19

6:20 am-6:47 pm

2 stops20h 27m

$591

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mar. 8/26

3:25 pm-11:20 am

1 stop11h 55m

London Heathrow

jue. 9/4

10:55 am-10:30 pm

1 stop19h 35m

$593

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mié. 11/5

6:00 am-6:25 am

2 stops16h 25m

London Heathrow

mié. 11/19

6:20 am-6:18 pm

2 stops19h 58m

$595

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mié. 11/5

9:45 am-10:00 am

1 stop16h 15m

London Heathrow

mié. 11/19

10:45 am-6:18 pm

1 stop15h 33m

$598

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

mar. 10/14

7:00 am-12:20 pm

1 stop22h 20m

London Heathrow

mar. 11/11

1:25 pm-11:39 am

2 stops29h 14m

$604

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mar. 10/28

9:45 am-10:00 am

1 stop17h 15m

London Heathrow

jue. 11/6

6:20 am-2:49 pm

2 stops16h 29m

$606

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

mié. 9/3

10:40 am-12:20 pm

1 stop18h 40m

London Heathrow

mar. 9/16

3:50 pm-11:31 am

2 stops26h 41m

$610

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mar. 8/26

3:25 pm-2:15 pm

1 stop14h 50m

London Heathrow

jue. 9/4

6:30 am-2:45 pm

2 stops16h 15m

$612

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

mar. 8/26

5:15 am-6:30 am

2 stops17h 15m

London Heathrow

jue. 9/4

8:05 pm-9:03 pm

2 stops32h 58m

$622

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

mar. 9/23

7:00 am-6:25 am

1 stop16h 25m

London Heathrow

mié. 10/1

10:30 am-9:48 pm

1 stop18h 18m

$627

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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 $751, 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 $786.

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 weeks ahead of your departure date. In general, you can expect to find flights to London for around $942 when searching weeks 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 $577 on momondo.

Cheap Idaho to London flight deals and tips

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

Best Price Found	$303
Fastest flight time	11h 24m
Direct flights	None
Airports in London	3 airports

The best one-way flight to London from Idaho in the past 72 hours is $303. The best round-trip flight deal from Idaho to London found on momondo in the last 72 hours is $591.

The fastest flight from Idaho to London takes 11h 24m

There are no direct flights from Idaho to London. Popular non-direct routes for this connection are Boise Air Term. Gowen Fld Airport - London Gatwick Airport, Spokane Airport - London Heathrow Airport and Boise Air Term. Gowen Fld Airport - London Heathrow Airport.

There are 3 airports near London: London City (LCY), London Heathrow (LHR), London Gatwick (LGW)

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 August 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 $555	Free Cancellation	Rating 7.8 1,381 reviews	Search KLM flights
United Airlines	PriceFrom $679	Free Cancellation	Rating 7.4 8,917 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom $695	Free Cancellation	Rating 7.4 657 reviews	Search Virgin Atlantic flights
American Airlines	PriceFrom $703	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $751	Free Cancellation	Rating 8.0 7,985 reviews	Search Delta flights

Gatwick

Hounslow

Dover

Slough

Luton

Guildford

Milton Keynes

Dartford

Crawley

Hayes

Chelmsford

Stansted

Ilford

Brentwood

Colchester

Folkestone

Watford

Canterbury

Richmond

Wembley

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 $303

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 12/15. 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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Find the cheapest flights from Idaho to London

Cheap round-trip flights

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Cheap last minute flights

United Airlines flights from Idaho to London

Our best United Airlines deals on Idaho to London flight tickets

Air Canada flights from Idaho to London

Our best Air Canada deals on Idaho to London flight tickets

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Use the filters below to find and compare flights from Idaho to London that are best for you.

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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?

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

Virgin Atlantic, Air Canada, and United Airlines 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 Lewiston or Boise, and flying into London, then you can expect flight times to average 13h 30m and 14h 40m, 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

Best Price Found

Fastest flight time

Direct flights

Airports in London

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