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

KLM, Delta, and Air New Zealand 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 35% 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.

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 12h 03m on average. If you fly from Idaho Falls (another popular airport in Idaho) to London Heathrow Airport, then the average flight time is 13h 05m.

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 September 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.

$255 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

Last minute

Cheap round-trip flights

3:54 pm - 6:30 pmBOI-LHR

19h 36m2 stops

6:40 am - 10:39 pmLHR-BOI

22h 59m2 stops

$604Scandinavian Airlines

Find Deal

Thu, Nov 13 - Tue, Nov 18

3:54 pm - 9:20 pmBOI-LHR

22h 26m3 stops

6:40 am - 10:39 pmLHR-BOI

22h 59m2 stops

$608Scandinavian Airlines

Find Deal

Thu, Nov 13 - Tue, Nov 18

12:51 pm - 11:10 amGEG-LHR

14h 19m1 stop

6:30 am - 2:57 pmLHR-GEG

16h 27m2 stops

$715KLM

Find Deal

Sun, Oct 19 - Tue, Nov 4

5:05 am - 10:35 amGEG-EDI

21h 30m2 stops

11:30 am - 10:39 amEDI-GEG

31h 09m2 stops

$718United Airlines

Find Deal

Tue, Oct 14 - Thu, Oct 23

6:53 pm - 9:50 amIDA-LHR

31h 57m1 stop

8:25 pm - 6:13 pmLHR-IDA

28h 48m2 stops

$721KLM

Find Deal

Sun, Oct 19 - Tue, Nov 4

11:20 am - 12:50 pmGEG-LHR

18h 30m1 stop

6:30 am - 7:46 pmLHR-GEG

21h 16m2 stops

$722Delta

Find Deal

Tue, Oct 28 - Thu, Nov 6

5:05 am - 8:25 amGEG-EDI

19h 20m2 stops

11:30 am - 11:42 amEDI-GEG

32h 12m1 stop

$724United Airlines

Find Deal

Tue, Oct 14 - Thu, Oct 23

1:43 pm - 11:40 amBOI-LHR

14h 57m1 stop

12:20 pm - 6:25 pmLHR-BOI

13h 05m1 stop

$725Virgin Atlantic

Find Deal

Tue, Feb 17 - Thu, Feb 26

11:42 am - 10:30 amBOI-LHR

15h 48m1 stop

6:20 am - 8:20 pmLHR-BOI

21h 00m2 stops

$727Delta

Find Deal

Sun, Nov 16 - Wed, Dec 10

3:37 pm - 2:15 pmGEG-LHR

14h 38m1 stop

11:05 am - 7:46 pmLHR-GEG

16h 41m1 stop

$735Virgin Atlantic

Find Deal

Sun, Oct 19 - Tue, Nov 4

KLM flights from Idaho to United Kingdom

Our best KLM deals on Idaho to United Kingdom flight tickets

KLM

Oct 19

GEG12:51 pmSpokane

14h 19m

1 stop

LHR11:10 amLondon Heathrow

Nov 4

LHR6:30 amLondon Heathrow

16h 27m

2 stops

GEG2:57 pmSpokane

$715

Find similar

KLM

Oct 19

IDA6:53 pmIdaho Falls Fanning Field

31h 57m

1 stop

LHR9:50 amLondon Heathrow

Nov 4

LHR8:25 pmLondon Heathrow

28h 48m

2 stops

IDA6:13 pmIdaho Falls Fanning Field

$721

Find similar

KLM

Nov 17

BOI12:50 pmBoise Air Term. Gowen Fld

14h 10m

1 stop

LHR10:00 amLondon Heathrow

Dec 11

LHR6:30 amLondon Heathrow

19h 21m

2 stops

BOI6:51 pmBoise Air Term. Gowen Fld

$728

Find similar

Virgin Atlantic flights from Idaho to United Kingdom

Our best Virgin Atlantic deals on Idaho to United Kingdom flight tickets

Virgin Atlantic

Feb 17

BOI1:43 pmBoise Air Term. Gowen Fld

14h 57m

1 stop

LHR11:40 amLondon Heathrow

Feb 26

LHR12:20 pmLondon Heathrow

13h 05m

1 stop

BOI6:25 pmBoise Air Term. Gowen Fld

$725

Find similar

Virgin Atlantic

Oct 19

GEG3:37 pmSpokane

14h 38m

1 stop

LHR2:15 pmLondon Heathrow

Nov 4

LHR11:05 amLondon Heathrow

16h 41m

1 stop

GEG7:46 pmSpokane

$735

Find similar

Virgin Atlantic

Oct 23

BOI2:00 pmBoise Air Term. Gowen Fld

14h 20m

1 stop

LHR11:20 amLondon Heathrow

Oct 30

LHR8:00 pmLondon Heathrow

30h 16m

2 stops

BOI8:16 pmBoise Air Term. Gowen Fld

$779

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Thu 11/13

3:54 pm-6:30 pm

2 stops19h 36m

London Heathrow

Tue 11/18

6:40 am-10:39 pm

2 stops22h 59m

$604

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Thu 11/13

3:54 pm-9:20 pm

3 stops22h 26m

London Heathrow

Tue 11/18

6:40 am-10:39 pm

2 stops22h 59m

$608

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 10/19

12:51 pm-11:10 am

1 stop14h 19m

London Heathrow

Tue 11/4

6:30 am-2:57 pm

2 stops16h 27m

$715

SpokaneEdinburgh

GEG - EDI

GEGEDI

Spokane

Tue 10/14

5:05 am-10:35 am

2 stops21h 30m

Edinburgh Turnhouse

Thu 10/23

11:30 am-10:39 am

2 stops31h 09m

$718

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Sun 10/19

6:53 pm-9:50 am

1 stop31h 57m

London Heathrow

Tue 11/4

8:25 pm-6:13 pm

2 stops28h 48m

$721

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 10/28

11:20 am-12:50 pm

1 stop18h 30m

London Heathrow

Thu 11/6

6:30 am-7:46 pm

2 stops21h 16m

$722

SpokaneEdinburgh

GEG - EDI

GEGEDI

Spokane

Tue 10/14

5:05 am-8:25 am

2 stops19h 20m

Edinburgh Turnhouse

Thu 10/23

11:30 am-11:42 am

1 stop32h 12m

$724

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

1:43 pm-11:40 am

1 stop14h 57m

London Heathrow

Thu 2/26

12:20 pm-6:25 pm

1 stop13h 05m

$725

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 11/16

11:42 am-10:30 am

1 stop15h 48m

London Heathrow

Wed 12/10

6:20 am-8:20 pm

2 stops21h 00m

$727

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 10/19

3:37 pm-2:15 pm

1 stop14h 38m

London Heathrow

Tue 11/4

11:05 am-7:46 pm

1 stop16h 41m

$735

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 $707. If you aren’t able to travel to United Kingdom during the month of October, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $788.

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 weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $971 when searching weeks 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 $687 on momondo.

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

You could potentially save up to 3% 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

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 September 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 7.8 1,391 reviews	Search KLM flights
Delta	PriceFrom $672	Free Cancellation	Rating 7.9 7,973 reviews	Search Delta flights
United Airlines	PriceFrom $697	Free Cancellation	Rating 7.4 8,928 reviews	Search United Airlines flights
Virgin Atlantic	PriceFrom $697	Free Cancellation	Rating 7.4 664 reviews	Search Virgin Atlantic flights
American Airlines	PriceFrom $703	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Icelandair	PriceFrom $1,097	Free Cancellation	Rating 7.0 545 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.