How long is the flight from Idaho to United Kingdom?

The flight from Idaho to United Kingdom depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Idaho Falls (a popular airport in Idaho) to London Heathrow Airport (the most popular airport in United Kingdom), then the flight time is 11h 38m on average. If you fly from Boise (another popular airport in Idaho) to London Heathrow Airport, then the average flight time is 11h 49m.

What is the cheapest airline that flies from Idaho to United Kingdom?

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

What airlines fly to United Kingdom?

United Airlines, Delta and Virgin Atlantic are the top three most popular airlines that fly to United Kingdom from Idaho according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to United Kingdom. Keep in mind that there are 5 different airlines that fly to United Kingdom 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 United Kingdom?

Prices for flights from Idaho to United Kingdom refresh daily.

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

The number of operators available for flights from Idaho to United Kingdom is 5 as of April 2026.

How old do you have to be to fly from Idaho to United Kingdom?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to United Kingdom.

What documentation or ID do you need to fly to United Kingdom?

The required travel and health documents for your United Kingdom 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 United Kingdom. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$323 Cheap Flights from Idaho to the United Kingdom in 2026

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Find the cheapest flights from Idaho to the United Kingdom

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:42 pm - 4:00 pm

BOI

LHR

20h 18m

2 stops

6:40 am - 11:08 pm

LHR

BOI

23h 28m

2 stops

$822Scandinavian Airlines

Sa, Okt 3 - Mo, Okt 12

12:42 pm - 9:40 pm

BOI

LHR

25h 58m

2 stops

6:40 am - 11:08 pm

LHR

BOI

23h 28m

2 stops

$823Scandinavian Airlines

Sa, Okt 3 - Mo, Okt 12

5:00 am - 10:00 am

BOI

LHR

22h 00m

2 stops

9:30 am - 9:25 pm

LHR

BOI

18h 55m

2 stops

$846United Airlines

Di, Sep 1 - Do, Sep 3

5:44 pm - 8:25 am

BOI

EDI

31h 41m

2 stops

9:00 am - 1:35 pm

EDI

BOI

35h 35m

2 stops

$858United Airlines

Sa, Aug 22 - Mi, Sep 2

2:20 pm - 12:50 pm

IDA

LHR

15h 30m

1 stop

8:15 am - 9:22 pm

LHR

IDA

20h 07m

2 stops

$869American Airlines

Mi, Okt 7 - Di, Okt 13

12:45 pm - 12:50 pm

GEG

LHR

16h 05m

1 stop

6:15 am - 8:47 pm

LHR

GEG

22h 32m

2 stops

$871Iberia

Mi, Sep 23 - Mi, Okt 14

6:00 am - 7:30 am

GEG

EDI

17h 30m

2 stops

10:30 am - 11:02 pm

EDI

GEG

20h 32m

2 stops

$872Multiple Airlines

Di, Sep 1 - Di, Sep 15

6:00 am - 9:05 am

GEG

LHR

19h 05m

1 stop

6:15 am - 8:47 pm

LHR

GEG

22h 32m

2 stops

$873Iberia

Mi, Sep 23 - Mi, Okt 14

1:44 pm - 11:15 am

IDA

LHR

14h 31m

1 stop

12:55 pm - 9:22 pm

LHR

IDA

15h 27m

1 stop

$902Multiple Airlines

So, Okt 4 - Mi, Okt 21

2:20 pm - 12:50 pm

IDA

LHR

15h 30m

1 stop

11:00 am - 9:22 pm

LHR

IDA

17h 22m

1 stop

$903American Airlines

So, Okt 4 - Mi, Okt 21

Scandinavian Airlines flights from Idaho to United Kingdom

Our best Scandinavian Airlines deals on Idaho to United Kingdom flight tickets

Scandinavian Airlines

Oct 3

BOI12:42 pmBoise Air Term. Gowen Fld

20h 18m

2 stops

LHR4:00 pmLondon Heathrow

Oct 12

LHR6:40 amLondon Heathrow

23h 28m

2 stops

BOI11:08 pmBoise Air Term. Gowen Fld

$822

Scandinavian Airlines

Oct 3

BOI12:42 pmBoise Air Term. Gowen Fld

25h 58m

2 stops

LHR9:40 pmLondon Heathrow

Oct 12

LHR6:40 amLondon Heathrow

23h 28m

2 stops

BOI11:08 pmBoise Air Term. Gowen Fld

$823

Scandinavian Airlines

Oct 3

BOI12:42 pmBoise Air Term. Gowen Fld

21h 58m

2 stops

LHR5:40 pmLondon Heathrow

Oct 12

LHR6:40 amLondon Heathrow

23h 28m

2 stops

BOI11:08 pmBoise Air Term. Gowen Fld

$825

Finnair flights from Idaho to United Kingdom

Our best Finnair deals on Idaho to United Kingdom flight tickets

Finnair

Aug 10

BOI6:44 amBoise Air Term. Gowen Fld

19h 16m

1 stop

LHR9:00 amLondon Heathrow

Aug 21

LHR2:25 pmLondon Heathrow

14h 52m

1 stop

BOI10:17 pmBoise Air Term. Gowen Fld

$902

Finnair

Sep 9

BOI6:44 amBoise Air Term. Gowen Fld

23h 06m

1 stop

LHR12:50 pmLondon Heathrow

Sep 30

LHR2:25 pmLondon Heathrow

14h 52m

1 stop

BOI10:17 pmBoise Air Term. Gowen Fld

$903

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sa 10/3

12:42 pm-4:00 pm

2 stops20h 18m

London Heathrow

Mo 10/12

6:40 am-11:08 pm

2 stops23h 28m

$822

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sa 10/3

12:42 pm-9:40 pm

2 stops25h 58m

London Heathrow

Mo 10/12

6:40 am-11:08 pm

2 stops23h 28m

$823

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Di 9/1

5:00 am-10:00 am

2 stops22h 00m

London Heathrow

Do 9/3

9:30 am-9:25 pm

2 stops18h 55m

$846

BoiseEdinburgh

BOI - EDI

BOIEDI

Boise Air Term. Gowen Fld

Sa 8/22

5:44 pm-8:25 am

2 stops31h 41m

Edinburgh Turnhouse

Mi 9/2

9:00 am-1:35 pm

2 stops35h 35m

$858

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mi 10/7

2:20 pm-12:50 pm

1 stop15h 30m

London Heathrow

Di 10/13

8:15 am-9:22 pm

2 stops20h 07m

$869

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mi 9/23

12:45 pm-12:50 pm

1 stop16h 05m

London Heathrow

Mi 10/14

6:15 am-8:47 pm

2 stops22h 32m

$871

SpokaneEdinburgh

GEG - EDI

GEGEDI

Spokane

Di 9/1

6:00 am-7:30 am

2 stops17h 30m

Edinburgh Turnhouse

Di 9/15

10:30 am-11:02 pm

2 stops20h 32m

$872

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Mi 9/23

6:00 am-9:05 am

1 stop19h 05m

London Heathrow

Mi 10/14

6:15 am-8:47 pm

2 stops22h 32m

$873

Quickest round-trip

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

So 10/4

1:44 pm-11:15 am

1 stop14h 31m

London Heathrow

Mi 10/21

12:55 pm-9:22 pm

1 stop15h 27m

$902

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

So 10/4

2:20 pm-12:50 pm

1 stop15h 30m

London Heathrow

Mi 10/21

11:00 am-9:22 pm

1 stop17h 22m

$903

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 Idaho to United Kingdom

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 United Kingdom?

In general, October is the cheapest month to fly from Idaho to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $705. If you aren’t able to travel to United Kingdom during the month of October, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $706.

Can stopping save me money on Idaho to United Kingdom flights?

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

Cheap Idaho to United Kingdom flight deals and tips

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

Fastest flight time	11h 38m
Direct flights	None

The fastest flight from Idaho to United Kingdom takes 11h 38m

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

Search flight deals

Frequently asked questions about flying from Idaho to the United Kingdom

When did momondo last update prices for flights from Idaho to United Kingdom?
Prices for flights from Idaho to United Kingdom refresh daily.
How many operators does momondo search for flights from Idaho to United Kingdom?
The number of operators available for flights from Idaho to United Kingdom is 5 as of April 2026.
How old do you have to be to fly from Idaho to United Kingdom?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to United Kingdom.
What documentation or ID do you need to fly to United Kingdom?
The required travel and health documents for your United Kingdom 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 United Kingdom. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Idaho to United Kingdom

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

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $577	Free Cancellation	Rating 7.8 1,495 reviews	Search KLM flights
Virgin Atlantic	PriceFrom $604	Free Cancellation	Rating 7.5 685 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $627	Free Cancellation	Rating 7.9 8,406 reviews	Search Delta flights
United Airlines	PriceFrom $639	Free Cancellation	Rating 7.4 9,572 reviews	Search United Airlines flights
American Airlines	PriceFrom $874	Free Cancellation	Rating 7.1 11,569 reviews	Search American Airlines flights

Why use momondo?

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

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 United Kingdom for you.

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

Yes. momondo enables you to select and highlight flights to United Kingdom from Idaho with this policy.

How can momondo help me find flights from Idaho to United Kingdom?

Once you have performed a search for Idaho to United Kingdom flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to United Kingdom, momondo offers a useful price alert feature which will track prices for flights to United Kingdom from Idaho and alert you when they change.