How long is the flight from Idaho to United Kingdom?

The flight from Idaho to United Kingdom depends on which airports you’re departing from and arriving to, 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, KLM, and American Airlines 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 were last updated today.

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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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.

£240 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 return flights

Enter your travel dates to find the best prices.

12:42 - 16:00

BOI

LHR

20h 18m

2 stops

06:40 - 23:08

LHR

BOI

23h 28m

2 stops

£611Scandinavian Airlines

Sat, 3 Oct - Mon, 12 Oct

12:42 - 21:40

BOI

LHR

25h 58m

2 stops

06:40 - 23:08

LHR

BOI

23h 28m

2 stops

£612Scandinavian Airlines

Sat, 3 Oct - Mon, 12 Oct

05:00 - 10:00

BOI

LHR

22h 00m

2 stops

09:30 - 21:25

LHR

BOI

18h 55m

2 stops

£629United Airlines

Tue, 1 Sep - Thu, 3 Sep

17:44 - 08:25

BOI

EDI

31h 41m

2 stops

09:00 - 13:35

EDI

BOI

35h 35m

2 stops

£638United Airlines

Sat, 22 Aug - Wed, 2 Sep

14:20 - 12:50

IDA

LHR

15h 30m

1 stop

08:15 - 21:22

LHR

IDA

20h 07m

2 stops

£646American Airlines

Wed, 7 Oct - Tue, 13 Oct

06:00 - 09:00

GEG

LHR

19h 00m

1 stop

06:15 - 20:47

LHR

GEG

22h 32m

2 stops

£647Iberia

Wed, 12 Aug - Tue, 15 Sep

12:45 - 12:50

GEG

LHR

16h 05m

1 stop

06:15 - 20:47

LHR

GEG

22h 32m

2 stops

£648Iberia

Wed, 23 Sep - Wed, 14 Oct

06:00 - 07:30

GEG

EDI

17h 30m

2 stops

10:30 - 23:02

EDI

GEG

20h 32m

2 stops

£649Multiple Airlines

Tue, 1 Sep - Tue, 15 Sep

13:44 - 11:15

IDA

LHR

14h 31m

1 stop

12:55 - 21:22

LHR

IDA

15h 27m

1 stop

£671Multiple Airlines

Sun, 4 Oct - Wed, 21 Oct

14:20 - 12:50

IDA

LHR

15h 30m

1 stop

11:00 - 21:22

LHR

IDA

17h 22m

1 stop

£672American Airlines

Sun, 4 Oct - Wed, 21 Oct

Lufthansa flights from Idaho to United Kingdom

Our best Lufthansa deals on Idaho to United Kingdom flight tickets

Lufthansa

30 Sept

GEG07:02Spokane

25h 38m

2 stops

LHR16:40London Heathrow

7 Oct

LHR07:30London Heathrow

21h 39m

2 stops

GEG21:09Spokane

£674

Lufthansa

18 Aug

BOI14:44Boise Air Term. Gowen Fld

20h 11m

2 stops

LCY17:55London City

27 Aug

LCY09:15London City

19h 10m

2 stops

BOI21:25Boise Air Term. Gowen Fld

£678

Lufthansa

23 Sept

GEG13:38Spokane

20h 02m

2 stops

LHR17:40London Heathrow

14 Oct

LHR09:00London Heathrow

22h 38m

2 stops

GEG23:38Spokane

£689

Alaska Airlines flights from Idaho to United Kingdom

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

Alaska Airlines

10 Aug

GEG06:13Spokane

24h 52m

1 stop

LHR15:05London Heathrow

2 Sept

LHR17:00London Heathrow

13h 25m

1 stop

GEG22:25Spokane

£664

Alaska Airlines

27 Sept

GEG07:00Spokane

24h 05m

1 stop

LHR15:05London Heathrow

7 Oct

LHR17:00London Heathrow

27h 30m

1 stop

GEG12:30Spokane

£666

Alaska Airlines

5 Oct

GEG18:07Spokane

12h 58m

1 stop

LHR15:05London Heathrow

12 Oct

LHR17:00London Heathrow

15h 18m

1 stop

GEG00:18Spokane

£695

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sat 3/10

12:42-16:00

2 stops20h 18m

London Heathrow

Mon 12/10

06:40-23:08

2 stops23h 28m

£611

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sat 3/10

12:42-21:40

2 stops25h 58m

London Heathrow

Mon 12/10

06:40-23:08

2 stops23h 28m

£612

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 1/9

05:00-10:00

2 stops22h 00m

London Heathrow

Thu 3/9

09:30-21:25

2 stops18h 55m

£629

BoiseEdinburgh

BOI - EDI

BOIEDI

Boise Air Term. Gowen Fld

Sat 22/8

17:44-08:25

2 stops31h 41m

Edinburgh Turnhouse

Wed 2/9

09:00-13:35

2 stops35h 35m

£638

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Wed 7/10

14:20-12:50

1 stop15h 30m

London Heathrow

Tue 13/10

08:15-21:22

2 stops20h 07m

£646

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/8

06:00-09:00

1 stop19h 00m

London Heathrow

Tue 15/9

06:15-20:47

2 stops22h 32m

£647

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 23/9

12:45-12:50

1 stop16h 05m

London Heathrow

Wed 14/10

06:15-20:47

2 stops22h 32m

£648

SpokaneEdinburgh

GEG - EDI

GEGEDI

Spokane

Tue 1/9

06:00-07:30

2 stops17h 30m

Edinburgh Turnhouse

Tue 15/9

10:30-23:02

2 stops20h 32m

£649

Fastest return journey

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Sun 4/10

13:44-11:15

1 stop14h 31m

London Heathrow

Wed 21/10

12:55-21:22

1 stop15h 27m

£671

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Sun 4/10

14:20-12:50

1 stop15h 30m

London Heathrow

Wed 21/10

11:00-21:22

1 stop17h 22m

£672

Flights are sorted by cheapest return 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?

The cheapest month to fly to United Kingdom from Idaho is in October. Flight prices, which tend to average around £524, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of October, then departing from Idaho during the month April is also very affordable. Most momondo users find prices during this month for around £525.

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

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.

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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 were last updated today.
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 that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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.

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Idaho to United Kingdom. momondo saves you time and could save you money on your trip.

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

All flight searches from Idaho to United Kingdom on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Idaho to United Kingdom.

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

Price alerts on flights to United Kingdom from Idaho are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.