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 23m on average. If you fly from Boise (another popular airport in Idaho) to London Heathrow Airport, then the average flight time is 13h 44m.

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 39% of people opting to fly with this airline when traveling to United Kingdom. Keep in mind that there are 6 different airlines that fly to United Kingdom on a routine basis, so you have a few additional options to choose from.

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

United Airlines, Lufthansa, and Air New Zealand are the most popular carriers operating from Idaho to 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 November 2025.

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.

$316 Cheap Flights from Idaho to the United Kingdom in 2025/26

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Find the cheapest flights from Idaho to the United Kingdom

Round-trip

One-way

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Cheap round-trip flights

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1:46 pm - 10:30 amBOI-LHR

13h 44m1 stop

11:20 am - 10:49 pmLHR-BOI

18h 29m1 stop

$564Virgin Atlantic

Find Deal

Tue, Feb 17 - Thu, Feb 26

4:49 pm - 12:50 pmBOI-LHR

13h 01m1 stop

2:45 pm - 11:59 pmLHR-BOI

16h 14m1 stop

$567Virgin Atlantic

Find Deal

Tue, Feb 17 - Thu, Feb 26

7:00 am - 10:00 amJAC-LHR

20h 00m1 stop

8:25 pm - 5:05 pmLHR-JAC

27h 40m2 stops

$590KLM

Find Deal

Wed, Dec 3 - Mon, Dec 8

11:44 am - 10:30 amBOI-LHR

15h 46m1 stop

6:20 am - 6:51 pmLHR-BOI

19h 31m2 stops

$590Delta

Find Deal

Tue, Dec 2 - Tue, Dec 9

7:00 am - 7:05 amJAC-LHR

17h 05m2 stops

8:25 pm - 5:05 pmLHR-JAC

27h 40m2 stops

$595KLM

Find Deal

Wed, Dec 3 - Mon, Dec 8

10:36 am - 10:30 amBOI-LHR

16h 54m1 stop

9:00 am - 10:49 pmLHR-BOI

20h 49m2 stops

$597Delta

Find Deal

Tue, Feb 17 - Tue, Feb 24

7:20 am - 3:15 pmBOI-EDI

24h 55m2 stops

6:35 pm - 7:25 pmEDI-BOI

31h 50m2 stops

$606Finnair

Find Deal

Mon, Jan 12 - Mon, Jan 19

7:20 am - 3:15 pmBOI-EDI

24h 55m2 stops

6:35 pm - 7:25 pmEDI-BOI

31h 50m2 stops

$608Finnair

Find Deal

Mon, Jan 12 - Mon, Jan 19

5:00 am - 5:55 amBOI-LHR

17h 55m2 stops

11:10 am - 11:48 pmLHR-BOI

19h 38m2 stops

$615United Airlines

Find Deal

Tue, Feb 17 - Thu, Feb 26

4:25 pm - 7:10 amJAC-LHR

31h 45m2 stops

6:35 am - 8:37 pmLHR-JAC

21h 02m2 stops

$617United Airlines

Find Deal

Thu, Dec 4 - Thu, Dec 11

Lufthansa flights from Idaho to United Kingdom

Our best Lufthansa deals on Idaho to United Kingdom flight tickets

Lufthansa

Mar 23

BOI2:43 pmBoise Air Term. Gowen Fld

20h 22m

2 stops

LHR5:05 pmLondon Heathrow

Apr 8

LHR6:55 amLondon Heathrow

18h 00m

2 stops

BOI5:55 pmBoise Air Term. Gowen Fld

$729

Find similar

Lufthansa

Mar 24

JAC2:30 pmJackson Hole

18h 15m

2 stops

LHR2:45 pmLondon Heathrow

Apr 3

LHR6:55 amLondon Heathrow

21h 07m

2 stops

JAC9:02 pmJackson Hole

$740

Find similar

Lufthansa

Mar 22

BOI2:43 pmBoise Air Term. Gowen Fld

20h 57m

2 stops

LCY5:40 pmLondon City

Mar 31

LCY9:15 amLondon City

19h 01m

2 stops

BOI9:16 pmBoise Air Term. Gowen Fld

$758

Find similar

Scandinavian Airlines flights from Idaho to United Kingdom

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

Scandinavian Airlines

Apr 25

BOI1:00 pmBoise Air Term. Gowen Fld

21h 40m

2 stops

LHR5:40 pmLondon Heathrow

May 4

LHR6:40 amLondon Heathrow

23h 24m

2 stops

BOI11:04 pmBoise Air Term. Gowen Fld

$730

Find similar

Scandinavian Airlines

Nov 9

BOI3:54 pmBoise Air Term. Gowen Fld

18h 46m

2 stops

LHR5:40 pmLondon Heathrow

Nov 11

LHR10:20 amLondon Heathrow

19h 19m

2 stops

BOI10:39 pmBoise Air Term. Gowen Fld

$2,097

Find similar

Scandinavian Airlines

Nov 9

BOI3:54 pmBoise Air Term. Gowen Fld

18h 46m

2 stops

LHR5:40 pmLondon Heathrow

Nov 11

LHR6:40 amLondon Heathrow

22h 59m

3 stops

BOI10:39 pmBoise Air Term. Gowen Fld

$2,109

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

11:20 am-10:49 pm

1 stop18h 29m

$564

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

4:49 pm-12:50 pm

1 stop13h 01m

London Heathrow

Thu 2/26

2:45 pm-11:59 pm

1 stop16h 14m

$567

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 12/3

7:00 am-10:00 am

1 stop20h 00m

London Heathrow

Mon 12/8

8:25 pm-5:05 pm

2 stops27h 40m

$590

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 12/2

11:44 am-10:30 am

1 stop15h 46m

London Heathrow

Tue 12/9

6:20 am-6:51 pm

2 stops19h 31m

$590

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Wed 12/3

7:00 am-7:05 am

2 stops17h 05m

London Heathrow

Mon 12/8

8:25 pm-5:05 pm

2 stops27h 40m

$595

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

10:36 am-10:30 am

1 stop16h 54m

London Heathrow

Tue 2/24

9:00 am-10:49 pm

2 stops20h 49m

$597

BoiseEdinburgh

BOI - EDI

BOIEDI

Boise Air Term. Gowen Fld

Mon 1/12

7:20 am-3:15 pm

2 stops24h 55m

Edinburgh Turnhouse

Mon 1/19

6:35 pm-7:25 pm

2 stops31h 50m

$606

BoiseEdinburgh

BOI - EDI

BOIEDI

Boise Air Term. Gowen Fld

Mon 1/12

7:20 am-3:15 pm

2 stops24h 55m

Edinburgh Turnhouse

Mon 1/19

6:35 pm-7:25 pm

2 stops31h 50m

$608

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

5:00 am-5:55 am

2 stops17h 55m

London Heathrow

Thu 2/26

11:10 am-11:48 pm

2 stops19h 38m

$615

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Thu 12/4

4:25 pm-7:10 am

2 stops31h 45m

London Heathrow

Thu 12/11

6:35 am-8:37 pm

2 stops21h 02m

$617

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 $662. 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 $782.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from Idaho to United Kingdom is on a Wednesday when prices can be found for as low as $801. The most expensive day to fly to United Kingdom is Friday, with ticket prices averaging around $975.

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

According to our data, the cheapest time of day to fly to United Kingdom is in the morning. momondo users have found flights departing from Idaho to United Kingdom in the morning for as low as $864. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom 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 United Kingdom?

You are more likely to see cheaper flights to United Kingdom from Idaho when booking week ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $939 when searching week out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Idaho for as low as $625 on momondo.

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

Direct flights	None

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

Search flight deals

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 November 2025.
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 7.7 1,405 reviews	Search KLM flights
United Airlines	PriceFrom $639	Free Cancellation	Rating 7.4 9,007 reviews	Search United Airlines flights
Delta	PriceFrom $672	Free Cancellation	Rating 7.9 8,001 reviews	Search Delta flights
Virgin Atlantic	PriceFrom $695	Free Cancellation	Rating 7.5 672 reviews	Search Virgin Atlantic flights
American Airlines	PriceFrom $703	Free Cancellation	Rating 7.2 11,040 reviews	Search American Airlines flights
Icelandair	PriceFrom $1,162	Free Cancellation	Rating 7.1 572 reviews	Search Icelandair 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.