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 49m on average. If you fly from Idaho Falls (another popular airport in Idaho) to London Heathrow Airport, then the average flight time is 12h.

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

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

What airlines fly to United Kingdom?

Delta, United Airlines and Virgin Atlantic are the top three most popular airlines that fly to United Kingdom from Idaho according to our data. Delta is the first choice among our users, with 45% 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 October 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.

$329 Cheap Flights from Idaho to the United Kingdom in 2026/27

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.

5:22 pm - 8:30 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

32h 08m2 stops Denver Intl Toronto Pearson Intl

6:35 am - 11:59 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

24h 24m2 stops Munich Franz Josef Strauss San Francisco

$761United Airlines

Tue, Mar 2 - Fri, Mar 5

5:22 pm - 8:30 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

32h 08m2 stops Denver Intl Toronto Pearson Intl

6:35 am - 9:15 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

21h 40m2 stops Munich Franz Josef Strauss San Francisco

$762United Airlines

Tue, Mar 2 - Fri, Mar 5

4:05 pm - 11:15 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

36h 10m1 stop San Francisco

6:35 am - 7:16 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

19h 41m2 stops Munich Franz Josef Strauss San Francisco

$820United Airlines

Tue, Mar 2 - Fri, Mar 5

12:00 pm - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

17h 20m1 stop Seattle/Tacoma Intl

2:45 pm - 12:11 amLHR London Heathrow-BOI Boise Air Term. Gowen Fld

16h 26m1 stop Seattle/Tacoma Intl

$879Alaska Airlines

Tue, Mar 2 - Fri, Mar 5

9:08 am - 12:20 pmIDA Idaho Falls Fanning Field-LHR London Heathrow

20h 12m1 stop Seattle/Tacoma Intl

2:45 pm - 10:53 pmLHR London Heathrow-IDA Idaho Falls Fanning Field

15h 08m1 stop Seattle/Tacoma Intl

$879Alaska Airlines

Tue, Jan 12 - Tue, Jan 19

12:00 pm - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

17h 20m1 stop Seattle/Tacoma Intl

2:45 pm - 12:11 amLHR London Heathrow-BOI Boise Air Term. Gowen Fld

16h 26m1 stop Seattle/Tacoma Intl

$880Alaska Airlines

Tue, Mar 2 - Fri, Mar 5

8:40 am - 10:40 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

19h 00m1 stop Seattle/Tacoma Intl

6:30 am - 4:00 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

16h 30m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$994Delta

Thu, Jan 21 - Sun, Jan 31

6:00 am - 7:05 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

18h 05m2 stops Salt Lake City Minneapolis St Paul

6:30 am - 5:16 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

17h 46m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,011Delta

Sun, Nov 29 - Sun, Dec 6

4:44 pm - 4:30 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

16h 46m1 stop Los Angeles

6:20 am - 7:17 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

19h 57m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

$1,046Virgin Atlantic

Wed, Dec 16 - Thu, Dec 24

5:15 am - 6:50 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

18h 35m2 stops Minneapolis St Paul Boston Logan Intl

8:55 am - 7:17 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

17h 22m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

$1,198Virgin Atlantic

Wed, Dec 16 - Thu, Dec 24

Cheap last minute flights

Enter your travel dates to find the best prices.

7:00 am - 12:50 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

22h 50m1 stop Dallas/Fort Worth

10:05 am - 10:42 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

19h 37m1 stop Dallas/Fort Worth

$1,065Finnair

Sun, Oct 18 - Mon, Nov 2

2:02 pm - 10:30 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

13h 28m1 stop Phoenix Sky Harbor Intl

10:05 am - 10:42 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

19h 37m1 stop Dallas/Fort Worth

$1,065American Airlines

Sun, Oct 18 - Mon, Nov 2

11:25 am - 11:55 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

17h 30m2 stops Denver Intl Reykjavik Keflavik Intl

8:35 pm - 10:30 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

32h 55m2 stops Reykjavik Keflavik Intl Denver Intl

$1,065Multiple Airlines

Sun, Oct 18 - Mon, Nov 2

7:00 am - 12:50 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

22h 50m1 stop Dallas/Fort Worth

10:05 am - 10:42 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

19h 37m1 stop Dallas/Fort Worth

$1,066Finnair

Sun, Oct 18 - Mon, Nov 2

6:45 am - 11:20 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

21h 35m1 stop Seattle/Tacoma Intl

6:30 am - 10:08 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

22h 38m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,080Delta

Sun, Oct 18 - Mon, Nov 2

12:08 pm - 11:20 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

16h 12m1 stop Seattle/Tacoma Intl

6:30 am - 5:14 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

17h 44m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,080Delta

Sun, Oct 18 - Mon, Nov 2

5:30 am - 6:25 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

17h 55m2 stops Minneapolis St Paul Atlanta Hartsfield-Jackson

6:30 am - 10:08 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

22h 38m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$1,085Delta

Sun, Oct 18 - Mon, Nov 2

10:35 am - 9:20 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 45m2 stops Denver Intl Newark

4:40 pm - 9:52 amLHR London Heathrow-BOI Boise Air Term. Gowen Fld

24h 12m2 stops Washington, D.C. Dulles Intl Denver Intl

$1,366United Airlines

Sat, Oct 17 - Sat, Oct 24

10:35 am - 8:30 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

14h 55m2 stops Denver Intl Chicago O'Hare Intl

4:40 pm - 9:52 amLHR London Heathrow-BOI Boise Air Term. Gowen Fld

24h 12m2 stops Washington, D.C. Dulles Intl Denver Intl

$1,366United Airlines

Sat, Oct 17 - Sat, Oct 24

10:30 am - 9:00 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 30m2 stops Denver Intl Chicago O'Hare Intl

11:05 am - 10:33 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

18h 28m2 stops Chicago O'Hare Intl Denver Intl

$2,883United Airlines

Fri, Oct 16 - Sat, Oct 24

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Alaska Airlines flights from Idaho to United Kingdom

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

Alaska Airlines

Jan 12

IDA9:08 amIdaho Falls Fanning Field

20h 12m

1 stop

LHR12:20 pmLondon Heathrow

Jan 19

LHR2:45 pmLondon Heathrow

15h 08m

1 stop

IDA10:53 pmIdaho Falls Fanning Field

$879

Alaska Airlines

Feb 18

BOI6:00 amBoise Air Term. Gowen Fld

23h 20m

1 stop

LHR12:20 pmLondon Heathrow

Feb 23

LHR2:45 pmLondon Heathrow

14h 35m

1 stop

BOI10:20 pmBoise Air Term. Gowen Fld

$929

Alaska Airlines

Feb 18

BOI6:00 amBoise Air Term. Gowen Fld

23h 20m

1 stop

LHR12:20 pmLondon Heathrow

Feb 23

LHR2:45 pmLondon Heathrow

14h 35m

1 stop

BOI10:20 pmBoise Air Term. Gowen Fld

$930

KLM flights from Idaho to United Kingdom

Our best KLM deals on Idaho to United Kingdom flight tickets

KLM

Jan 12

IDA1:10 pmIdaho Falls Fanning Field

15h 30m

2 stops

LHR11:40 amLondon Heathrow

Jan 19

LHR8:25 pmLondon Heathrow

28h 49m

2 stops

IDA6:14 pmIdaho Falls Fanning Field

$899

KLM

Nov 26

IDA1:11 pmIdaho Falls Fanning Field

26h 39m

2 stops

LBA10:50 pmLeeds/Bradford

Dec 3

LBA10:15 amLeeds/Bradford

39h 02m

2 stops

IDA6:17 pmIdaho Falls Fanning Field

$1,026

KLM

Dec 15

BOI1:07 pmBoise Air Term. Gowen Fld

16h 23m

2 stops

EDI12:30 pmEdinburgh Turnhouse

Dec 28

EDI5:40 amEdinburgh Turnhouse

19h 00m

2 stops

BOI5:40 pmBoise Air Term. Gowen Fld

$1,346

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Tue 3/2

5:22 pm-8:30 am

2 stops32h 08m

London Heathrow

Fri 3/5

6:35 am-11:59 pm

2 stops24h 24m

$761

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Tue 3/2

5:22 pm-8:30 am

2 stops32h 08m

London Heathrow

Fri 3/5

6:35 am-9:15 pm

2 stops21h 40m

$762

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Tue 3/2

4:05 pm-11:15 am

1 stop36h 10m

London Heathrow

Fri 3/5

6:35 am-7:16 pm

2 stops19h 41m

$820

Quickest round-trip

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Tue 3/2

12:00 pm-12:20 pm

1 stop17h 20m

London Heathrow

Fri 3/5

2:45 pm-12:11 am

1 stop16h 26m

$879

Idaho FallsLondon

IDA Idaho Falls Fanning Field - LHR London Heathrow

IDALHR

Idaho Falls Fanning Field

Tue 1/12

9:08 am-12:20 pm

1 stop20h 12m

London Heathrow

Tue 1/19

2:45 pm-10:53 pm

1 stop15h 08m

$879

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Tue 3/2

12:00 pm-12:20 pm

1 stop17h 20m

London Heathrow

Fri 3/5

2:45 pm-12:11 am

1 stop16h 26m

$880

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Thu 1/21

8:40 am-10:40 am

1 stop19h 00m

London Heathrow

Sun 1/31

6:30 am-4:00 pm

2 stops16h 30m

$994

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Sun 11/29

6:00 am-7:05 am

2 stops18h 05m

London Heathrow

Sun 12/6

6:30 am-5:16 pm

2 stops17h 46m

$1,011

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Wed 12/16

4:44 pm-4:30 pm

1 stop16h 46m

London Heathrow

Thu 12/24

6:20 am-7:17 pm

2 stops19h 57m

$1,046

BoiseLondon

BOI Boise Air Term. Gowen Fld - LHR London Heathrow

BOILHR

Boise Air Term. Gowen Fld

Wed 12/16

5:15 am-6:50 am

2 stops18h 35m

London Heathrow

Thu 12/24

8:55 am-7:17 pm

2 stops17h 22m

$1,198

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, November 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 $699. If you aren’t able to travel to United Kingdom during the month of November, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $843.

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

Best Price Found	$329
Fastest flight time	11h 49m
Direct flights	None

The best one-way flight to United Kingdom from Idaho in the past 72 hours is $329. The best round-trip flight deal from Idaho to United Kingdom found on momondo in the last 72 hours is $761.

The fastest flight from Idaho to United Kingdom takes 11h 49m

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

Search flight deals

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 October 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 7.5 695 reviews	Search Virgin Atlantic flights
United Airlines	PriceFrom $605	Free Cancellation	Rating 7.4 10,366 reviews	Search United Airlines flights
Delta	PriceFrom $627	Free Cancellation	Rating 7.8 8,654 reviews	Search Delta 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.