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 Boise (a popular airport in Idaho) to London Heathrow Airport (the most popular airport in United Kingdom), then the flight time is 11h 39m on average. If you fly from Idaho Falls (another popular airport in Idaho) to London Heathrow Airport, then the average flight time is 11h 41m.

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

United Airlines, Air Canada, and Delta 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 44% of people opting to fly with this airline when traveling to United Kingdom. Keep in mind that there are 3 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 3 as of July 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.

$309 Cheap Flights from Idaho to the United Kingdom in 2026

Discover deals from 900+ travel sites with momondo.

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.

5:40 pm - 9:40 am

IDA

LHR

33h 00m

1 stop

9:30 am - 9:08 pm

LHR

IDA

42h 38m

2 stops

$832United Airlines

Mon, Nov 30 - Thu, Dec 3

5:40 pm - 10:15 am

IDA

LHR

33h 35m

2 stops

9:30 am - 9:08 pm

LHR

IDA

42h 38m

2 stops

$842United Airlines

Mon, Nov 30 - Thu, Dec 3

1:51 pm - 3:15 pm

BOI

EDI

18h 24m

2 stops

11:05 am - 11:37 pm

EDI

BOI

19h 32m

2 stops

$864Multiple Airlines

Sun, Nov 1 - Wed, Nov 11

1:46 pm - 1:45 pm

IDA

LHR

16h 59m

1 stop

8:15 am - 9:42 pm

LHR

IDA

20h 27m

2 stops

$868Multiple Airlines

Wed, Oct 7 - Tue, Oct 13

2:15 pm - 5:10 pm

GEG

EDI

18h 55m

2 stops

8:45 am - 8:43 pm

EDI

GEG

18h 58m

2 stops

$875American Airlines

Wed, Oct 14 - Wed, Oct 28

5:10 am - 9:20 am

GEG

EDI

20h 10m

2 stops

11:15 am - 10:38 am

EDI

GEG

30h 23m

2 stops

$876Delta

Sun, Oct 11 - Wed, Oct 28

7:00 am - 12:55 pm

GEG

GLA

21h 55m

2 stops

5:40 am - 6:29 pm

GLA

GEG

19h 49m

2 stops

$878Delta

Sun, Oct 11 - Fri, Oct 30

6:00 am - 7:05 am

IDA

LHR

18h 05m

2 stops

5:50 pm - 6:14 pm

LHR

IDA

31h 24m

2 stops

$880KLM

Tue, Nov 3 - Tue, Nov 10

5:20 am - 6:20 am

GEG

LHR

17h 00m

2 stops

8:15 am - 8:42 pm

LHR

GEG

20h 27m

2 stops

$920American Airlines

Sun, Aug 16 - Tue, Sep 1

6:40 pm - 2:15 pm

BOI

LCY

36h 35m

2 stops

8:40 am - 6:50 pm

LCY

BOI

40h 10m

2 stops

$1,023KLM

Fri, Oct 23 - Sat, Oct 31

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American Airlines flights from Idaho to United Kingdom

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

American Airlines

Oct 14

GEG2:15 pmSpokane

18h 55m

2 stops

EDI5:10 pmEdinburgh Turnhouse

Oct 28

EDI8:45 amEdinburgh Turnhouse

18h 58m

2 stops

GEG8:43 pmSpokane

$875

American Airlines

Aug 16

GEG5:20 amSpokane

17h 00m

2 stops

LHR6:20 amLondon Heathrow

Sep 1

LHR8:15 amLondon Heathrow

20h 27m

2 stops

GEG8:42 pmSpokane

$920

American Airlines

Sep 9

GEG2:09 pmSpokane

19h 01m

2 stops

EDI5:10 pmEdinburgh Turnhouse

Sep 23

EDI10:30 amEdinburgh Turnhouse

17h 55m

2 stops

GEG8:25 pmSpokane

$924

Air Canada flights from Idaho to United Kingdom

Our best Air Canada deals on Idaho to United Kingdom flight tickets

Air Canada

Sep 21

BOI6:30 amBoise Air Term. Gowen Fld

22h 20m

2 stops

LHR11:50 amLondon Heathrow

Sep 30

LHR2:05 pmLondon Heathrow

38h 30m

2 stops

BOI9:35 pmBoise Air Term. Gowen Fld

$921

Air Canada

Oct 2

GEG1:38 pmSpokane

56h 57m

2 stops

LHR6:35 amLondon Heathrow

Oct 23

LHR12:05 pmLondon Heathrow

32h 29m

2 stops

GEG12:34 pmSpokane

$932

Air Canada

Aug 10

BOI5:46 pmBoise Air Term. Gowen Fld

29h 44m

2 stops

LHR6:30 amLondon Heathrow

Aug 20

LHR3:00 pmLondon Heathrow

31h 31m

2 stops

BOI3:31 pmBoise Air Term. Gowen Fld

$950

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 11/30

5:40 pm-9:40 am

1 stop33h 00m

London Heathrow

Thu 12/3

9:30 am-9:08 pm

2 stops42h 38m

$832

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Mon 11/30

5:40 pm-10:15 am

2 stops33h 35m

London Heathrow

Thu 12/3

9:30 am-9:08 pm

2 stops42h 38m

$842

BoiseEdinburgh

BOI - EDI

BOIEDI

Boise Air Term. Gowen Fld

Sun 11/1

1:51 pm-3:15 pm

2 stops18h 24m

Edinburgh Turnhouse

Wed 11/11

11:05 am-11:37 pm

2 stops19h 32m

$864

Quickest round-trip

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 10/7

1:46 pm-1:45 pm

1 stop16h 59m

London Heathrow

Tue 10/13

8:15 am-9:42 pm

2 stops20h 27m

$868

SpokaneEdinburgh

GEG - EDI

GEGEDI

Spokane

Wed 10/14

2:15 pm-5:10 pm

2 stops18h 55m

Edinburgh Turnhouse

Wed 10/28

8:45 am-8:43 pm

2 stops18h 58m

$875

SpokaneEdinburgh

GEG - EDI

GEGEDI

Spokane

Sun 10/11

5:10 am-9:20 am

2 stops20h 10m

Edinburgh Turnhouse

Wed 10/28

11:15 am-10:38 am

2 stops30h 23m

$876

SpokaneGlasgow

GEG - GLA

GEGGLA

Spokane

Sun 10/11

7:00 am-12:55 pm

2 stops21h 55m

Glasgow Intl

Fri 10/30

5:40 am-6:29 pm

2 stops19h 49m

$878

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Tue 11/3

6:00 am-7:05 am

2 stops18h 05m

London Heathrow

Tue 11/10

5:50 pm-6:14 pm

2 stops31h 24m

$880

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 8/16

5:20 am-6:20 am

2 stops17h 00m

London Heathrow

Tue 9/1

8:15 am-8:42 pm

2 stops20h 27m

$920

BoiseLondon

BOI - LCY

BOILCY

Boise Air Term. Gowen Fld

Fri 10/23

6:40 pm-2:15 pm

2 stops36h 35m

London City

Sat 10/31

8:40 am-6:50 pm

2 stops40h 10m

$1,023

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 $399. If you aren’t able to travel to United Kingdom during the month of October, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $547.

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

You could potentially save up to 2% 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 39m
Direct flights	None

The fastest flight from Idaho to United Kingdom takes 11h 39m

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

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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 3 as of July 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
Virgin Atlantic	PriceFrom $600	Free Cancellation	Rating 7.5 693 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $627	Free Cancellation	Rating 7.8 8,461 reviews	Search Delta flights
United Airlines	PriceFrom $639	Free Cancellation	Rating 7.4 9,982 reviews	Search United 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.