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

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

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 51m on average. If you fly from Idaho Falls (another popular airport in Idaho) to London Heathrow Airport, then the average flight time is 11h 54m.

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 51% 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 4 as of February 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.

$346 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.

10:40 pm - 7:05 am

GEG

EDI

24h 25m

2 stops

2:05 pm - 11:35 pm

EDI

GEG

17h 30m

2 stops

$644Delta

Mon, May 4 - Wed, May 13

6:26 pm - 6:35 pm

BOI

EDI

17h 09m

2 stops

10:25 am - 10:54 pm

EDI

BOI

19h 29m

2 stops

$644American Airlines

Mon, May 11 - Wed, May 20

5:29 pm - 12:20 pm

BOI

LHR

11h 51m

1 stop

10:50 am - 9:54 am

LHR

BOI

30h 04m

2 stops

$648United Airlines

Sun, Apr 12 - Tue, Apr 28

9:00 am - 12:10 pm

BOI

LHR

20h 10m

1 stop

6:15 am - 4:14 pm

LHR

BOI

16h 59m

2 stops

$655Delta

Sun, Apr 12 - Tue, Apr 28

6:00 am - 6:50 am

GEG

LHR

17h 50m

2 stops

11:05 am - 9:29 pm

LHR

GEG

17h 24m

1 stop

$665Virgin Atlantic

Thu, Mar 19 - Thu, Mar 26

1:45 pm - 3:35 pm

BOI

LHR

18h 50m

1 stop

2:30 pm - 11:00 pm

LHR

BOI

15h 30m

1 stop

$667KLM

Sun, Apr 12 - Tue, Apr 28

1:45 pm - 3:35 pm

BOI

LHR

18h 50m

1 stop

9:55 am - 11:00 pm

LHR

BOI

20h 05m

1 stop

$677KLM

Sun, Apr 12 - Tue, Apr 28

5:00 am - 8:35 am

BOI

LHR

20h 35m

2 stops

2:05 pm - 11:49 am

LHR

BOI

28h 44m

2 stops

$679Air Canada

Sun, Apr 12 - Tue, Apr 28

6:15 am - 10:00 am

BOI

LHR

20h 45m

2 stops

9:30 am - 9:54 am

LHR

BOI

31h 24m

2 stops

$684Air Canada

Sun, Apr 12 - Tue, Apr 28

2:37 pm - 12:20 pm

BOI

LHR

14h 43m

1 stop

9:00 am - 10:35 pm

LHR

BOI

20h 35m

2 stops

$698United Airlines

Wed, Apr 22 - Sun, Apr 26

Finnair flights from Idaho to United Kingdom

Our best Finnair deals on Idaho to United Kingdom flight tickets

Finnair

Apr 20

BOI1:29 pmBoise Air Term. Gowen Fld

14h 01m

1 stop

LHR10:30 amLondon Heathrow

May 1

LHR2:25 pmLondon Heathrow

15h 29m

1 stop

BOI10:54 pmBoise Air Term. Gowen Fld

$699

Finnair

Apr 27

BOI1:29 pmBoise Air Term. Gowen Fld

14h 01m

1 stop

LHR10:30 amLondon Heathrow

May 8

LHR2:25 pmLondon Heathrow

15h 29m

1 stop

BOI10:54 pmBoise Air Term. Gowen Fld

$700

United Airlines flights from Idaho to United Kingdom

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

United Airlines

Apr 12

BOI5:29 pmBoise Air Term. Gowen Fld

11h 51m

1 stop

LHR12:20 pmLondon Heathrow

Apr 28

LHR10:50 amLondon Heathrow

30h 04m

2 stops

BOI9:54 amBoise Air Term. Gowen Fld

$648

United Airlines

Apr 14

GEG12:35 pmSpokane

14h 35m

1 stop

LHR11:10 amLondon Heathrow

Apr 25

LHR7:25 amLondon Heathrow

22h 10m

2 stops

GEG9:35 pmSpokane

$698

United Airlines

May 2

GEG7:10 amSpokane

43h 25m

2 stops

EDI10:35 amEdinburgh Turnhouse

May 16

EDI9:40 amEdinburgh Turnhouse

19h 36m

2 stops

GEG9:16 pmSpokane

$700

Fly from

Fly to

Route

Depart

Return

Price

SpokaneEdinburgh

GEG - EDI

GEGEDI

Spokane

Mon 5/4

10:40 pm-7:05 am

2 stops24h 25m

Edinburgh Turnhouse

Wed 5/13

2:05 pm-11:35 pm

2 stops17h 30m

$644

BoiseEdinburgh

BOI - EDI

BOIEDI

Boise Air Term. Gowen Fld

Mon 5/11

6:26 pm-6:35 pm

2 stops17h 09m

Edinburgh Turnhouse

Wed 5/20

10:25 am-10:54 pm

2 stops19h 29m

$644

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 4/12

5:29 pm-12:20 pm

1 stop11h 51m

London Heathrow

Tue 4/28

10:50 am-9:54 am

2 stops30h 04m

$648

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 4/12

9:00 am-12:10 pm

1 stop20h 10m

London Heathrow

Tue 4/28

6:15 am-4:14 pm

2 stops16h 59m

$655

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Thu 3/19

6:00 am-6:50 am

2 stops17h 50m

London Heathrow

Thu 3/26

11:05 am-9:29 pm

1 stop17h 24m

$665

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 4/12

1:45 pm-3:35 pm

1 stop18h 50m

London Heathrow

Tue 4/28

2:30 pm-11:00 pm

1 stop15h 30m

$667

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 4/12

1:45 pm-3:35 pm

1 stop18h 50m

London Heathrow

Tue 4/28

9:55 am-11:00 pm

1 stop20h 05m

$677

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 4/12

5:00 am-8:35 am

2 stops20h 35m

London Heathrow

Tue 4/28

2:05 pm-11:49 am

2 stops28h 44m

$679

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 4/12

6:15 am-10:00 am

2 stops20h 45m

London Heathrow

Tue 4/28

9:30 am-9:54 am

2 stops31h 24m

$684

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 4/22

2:37 pm-12:20 pm

1 stop14h 43m

London Heathrow

Sun 4/26

9:00 am-10:35 pm

2 stops20h 35m

$698

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 $701. 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 $712.

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

You could potentially save up to 17% 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 51m
Direct flights	None

The fastest flight from Idaho to United Kingdom takes 11h 51m

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 4 as of February 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 $604	Free Cancellation	Rating 7.5 679 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $627	Free Cancellation	Rating 7.9 8,240 reviews	Search Delta flights
United Airlines	PriceFrom $639	Free Cancellation	Rating 7.4 9,339 reviews	Search United Airlines flights
American Airlines	PriceFrom $703	Free Cancellation	Rating 7.2 11,341 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.