What is the cheapest airline that flies from London Heathrow to Idaho?

Icelandair is the most popular carrier operating from London Heathrow to Idaho

When did momondo last update prices for flights from London Heathrow Airport to Idaho?

Prices for flights from London Heathrow Airport to Idaho refresh daily.

How old do you have to be to fly from London Heathrow Airport to Idaho?

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 London Heathrow Airport to Idaho.

What documentation or ID do you need to fly to Idaho?

The required travel and health documents for your Idaho 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 Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$619 Cheap Flights from London Heathrow Airport to Idaho in 2026/27

Find the cheapest flights from London Heathrow Airport to Idaho

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 pm - 2:52 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

27h 52m2 stops Toronto Pearson Intl San Francisco

4:10 pm - 5:55 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

30h 45m2 stops San Francisco Chicago O'Hare Intl

$937United Airlines

Tue, Jan 5 - Tue, Jan 12

2:45 pm - 2:19 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

30h 34m1 stop Seattle/Tacoma Intl

2:12 pm - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 08m1 stop Seattle/Tacoma Intl

$964Alaska Airlines

Fri, Dec 11 - Thu, Dec 24

6:30 am - 4:20 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

16h 50m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

2:00 pm - 10:40 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

13h 40m1 stop Seattle/Tacoma Intl

$965Multiple Airlines

Thu, Feb 4 - Fri, Feb 12

2:45 pm - 2:20 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

30h 35m1 stop Seattle/Tacoma Intl

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

17h 20m1 stop Seattle/Tacoma Intl

$968Alaska Airlines

Thu, Feb 4 - Fri, Feb 12

2:45 pm - 9:44 amLHR London Heathrow-BOI Boise Air Term. Gowen Fld

25h 59m1 stop Seattle/Tacoma Intl

7:45 pm - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

33h 35m1 stop Seattle/Tacoma Intl

$969Alaska Airlines

Mon, Nov 23 - Sun, Dec 6

6:30 am - 6:03 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

18h 33m2 stops Frankfurt am Main Denver Intl

8:15 am - 11:20 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

20h 05m2 stops San Francisco Toronto Pearson Intl

$980Lufthansa

Mon, Nov 23 - Sun, Dec 6

7:30 am - 6:09 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

17h 39m2 stops Frankfurt am Main Denver Intl

4:08 pm - 7:10 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

32h 02m2 stops San Francisco Montreal Pierre Elliott Trudeau Intl

$982United Airlines

Thu, Feb 4 - Fri, Feb 12

7:40 am - 9:15 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

20h 35m2 stops Chicago O'Hare Intl San Francisco

6:10 am - 9:40 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

20h 30m2 stops San Francisco Denver Intl

$994United Airlines

Fri, Nov 27 - Fri, Dec 4

2:45 pm - 3:28 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

31h 43m1 stop Seattle/Tacoma Intl

6:33 am - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

22h 47m1 stop Seattle/Tacoma Intl

$997Alaska Airlines

Sat, Nov 21 - Sat, Nov 28

2:45 pm - 3:28 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

31h 43m1 stop Seattle/Tacoma Intl

6:33 am - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

22h 47m1 stop Seattle/Tacoma Intl

$999Alaska Airlines

Sat, Nov 21 - Sat, Nov 28

Cheap last minute flights

Enter your travel dates to find the best prices.

6:40 am - 11:04 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

23h 24m2 stops Kastrup Copenhagen Los Angeles

4:00 pm - 9:40 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

22h 40m2 stops Los Angeles Kastrup Copenhagen

$869Scandinavian Airlines

Wed, Nov 4 - Sun, Nov 8

7:05 am - 11:04 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

22h 59m3 stops Oslo Gardermoen Kastrup Copenhagen Los Angeles

4:00 pm - 9:35 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

22h 35m3 stops Los Angeles Kastrup Copenhagen Oslo Gardermoen

$877Scandinavian Airlines

Wed, Nov 4 - Sun, Nov 8

12:15 pm - 10:35 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

17h 20m2 stops Reykjavik Keflavik Intl Denver Intl

11:15 am - 10:50 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

16h 35m2 stops Denver Intl Reykjavik Keflavik Intl

$1,041Multiple Airlines

Wed, Nov 4 - Sun, Nov 8

2:45 pm - 11:49 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

16h 04m1 stop Seattle/Tacoma Intl

10:49 am - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

18h 31m1 stop Seattle/Tacoma Intl

$1,057Alaska Airlines

Wed, Nov 4 - Sun, Nov 8

2:45 pm - 9:07 amLHR London Heathrow-BOI Boise Air Term. Gowen Fld

25h 22m1 stop Seattle/Tacoma Intl

6:21 pm - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

34h 59m1 stop Seattle/Tacoma Intl

$1,105Alaska Airlines

Thu, Nov 5 - Thu, Nov 12

8:35 pm - 11:00 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

33h 25m2 stops Reykjavik Keflavik Intl Denver Intl

12:49 pm - 10:50 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 01m2 stops Seattle/Tacoma Intl Reykjavik Keflavik Intl

$1,128Multiple Airlines

Thu, Nov 5 - Thu, Nov 12

2:45 pm - 11:49 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

16h 04m1 stop Seattle/Tacoma Intl

8:21 am - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

20h 59m2 stops San Francisco Seattle/Tacoma Intl

$1,197Alaska Airlines

Mon, Nov 2 - Mon, Nov 23

2:45 pm - 11:49 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

16h 04m1 stop Seattle/Tacoma Intl

7:21 pm - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

33h 59m1 stop Seattle/Tacoma Intl

$1,205Alaska Airlines

Mon, Nov 2 - Sat, Nov 21

2:45 pm - 9:07 amLHR London Heathrow-BOI Boise Air Term. Gowen Fld

25h 22m1 stop Seattle/Tacoma Intl

9:47 pm - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

31h 33m1 stop Seattle/Tacoma Intl

$1,206Alaska Airlines

Tue, Nov 3 - Sat, Nov 21

2:45 pm - 12:08 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

28h 23m2 stops Seattle/Tacoma Intl Los Angeles

7:06 pm - 12:20 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

34h 14m2 stops Los Angeles Seattle/Tacoma Intl

$1,226Alaska Airlines

Mon, Nov 2 - Sat, Nov 21

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Alaska Airlines flights from London Heathrow Airport to Idaho

Our best Alaska Airlines deals on London Heathrow Airport to Idaho flight tickets

Alaska Airlines

Dec 11

LHR2:45 pmLondon Heathrow

30h 34m

1 stop

BOI2:19 pmBoise Air Term. Gowen Fld

Dec 24

BOI2:12 pmBoise Air Term. Gowen Fld

15h 08m

1 stop

LHR12:20 pmLondon Heathrow

$964

Alaska Airlines

Feb 4

LHR2:45 pmLondon Heathrow

30h 35m

1 stop

BOI2:20 pmBoise Air Term. Gowen Fld

Feb 12

BOI12:00 pmBoise Air Term. Gowen Fld

17h 20m

1 stop

LHR12:20 pmLondon Heathrow

$968

Alaska Airlines

Nov 23

LHR2:45 pmLondon Heathrow

25h 59m

1 stop

BOI9:44 amBoise Air Term. Gowen Fld

Dec 6

BOI7:45 pmBoise Air Term. Gowen Fld

33h 35m

1 stop

LHR12:20 pmLondon Heathrow

$969

Icelandair flights from London Heathrow Airport to Idaho

Our best Icelandair deals on London Heathrow Airport to Idaho flight tickets

Icelandair

Nov 9

LHR12:15 pmLondon Heathrow

18h 31m

2 stops

BOI11:46 pmBoise Air Term. Gowen Fld

Nov 12

BOI12:49 pmBoise Air Term. Gowen Fld

23h 41m

2 stops

LHR7:30 pmLondon Heathrow

$1,032

Icelandair

Nov 21

LHR8:35 pmLondon Heathrow

32h 37m

2 stops

BOI10:12 pmBoise Air Term. Gowen Fld

Nov 28

BOI5:40 amBoise Air Term. Gowen Fld

30h 50m

2 stops

LHR7:30 pmLondon Heathrow

$1,138

Icelandair

Nov 5

LHR12:15 pmLondon Heathrow

17h 05m

2 stops

BOI10:20 pmBoise Air Term. Gowen Fld

Nov 24

BOI10:52 amBoise Air Term. Gowen Fld

25h 38m

2 stops

LHR7:30 pmLondon Heathrow

$1,315

momondo Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Tue 1/5

6:00 pm-2:52 pm

2 stops27h 52m

Boise Air Term. Gowen Fld

Tue 1/12

4:10 pm-5:55 am

2 stops30h 45m

$937

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 12/11

2:45 pm-2:19 pm

1 stop30h 34m

Boise Air Term. Gowen Fld

Thu 12/24

2:12 pm-12:20 pm

1 stop15h 08m

$964

Quickest round-trip

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Thu 2/4

6:30 am-4:20 pm

2 stops16h 50m

Boise Air Term. Gowen Fld

Fri 2/12

2:00 pm-10:40 am

1 stop13h 40m

$965

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Thu 2/4

2:45 pm-2:20 pm

1 stop30h 35m

Boise Air Term. Gowen Fld

Fri 2/12

12:00 pm-12:20 pm

1 stop17h 20m

$968

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 11/23

2:45 pm-9:44 am

1 stop25h 59m

Boise Air Term. Gowen Fld

Sun 12/6

7:45 pm-12:20 pm

1 stop33h 35m

$969

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 11/23

6:30 am-6:03 pm

2 stops18h 33m

Boise Air Term. Gowen Fld

Sun 12/6

8:15 am-11:20 am

2 stops20h 05m

$980

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Thu 2/4

7:30 am-6:09 pm

2 stops17h 39m

Boise Air Term. Gowen Fld

Fri 2/12

4:08 pm-7:10 am

2 stops32h 02m

$982

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Fri 11/27

7:40 am-9:15 pm

2 stops20h 35m

Boise Air Term. Gowen Fld

Fri 12/4

6:10 am-9:40 am

2 stops20h 30m

$994

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 11/21

2:45 pm-3:28 pm

1 stop31h 43m

Boise Air Term. Gowen Fld

Sat 11/28

6:33 am-12:20 pm

1 stop22h 47m

$997

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Sat 11/21

2:45 pm-3:28 pm

1 stop31h 43m

Boise Air Term. Gowen Fld

Sat 11/28

6:33 am-12:20 pm

1 stop22h 47m

$999

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 London Heathrow Airport to Idaho

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

What is the cheapest month to fly to Idaho?

In general, February is the cheapest month to fly from London Heathrow Airport to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you don’t want to visit Idaho in February, then you should wait until March to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $854.

Can stopping save me money on London Heathrow Airport to Idaho flights?

You could potentially save up to 4% on your flight if you consider stops on a London Heathrow Airport to Idaho flight.

Cheap London Heathrow Airport to Idaho flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Idaho

Best Price Found	$619
Fastest flight time	16h 43m
Direct flights	None

The best one-way flight to Idaho from London Heathrow Airport in the past 72 hours is $619. The best round-trip flight deal from London Heathrow Airport to Idaho found on momondo in the last 72 hours is $937.

The fastest flight from London Heathrow Airport to Idaho takes 16h 43m

There are no direct flights from London Heathrow Airport to Idaho. There are no popular flight routes from London Heathrow Airport to Idaho.

Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Idaho

When did momondo last update prices for flights from London Heathrow Airport to Idaho?
Prices for flights from London Heathrow Airport to Idaho refresh daily.
How old do you have to be to fly from London Heathrow Airport to Idaho?
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 London Heathrow Airport to Idaho.
What documentation or ID do you need to fly to Idaho?
The required travel and health documents for your Idaho 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 Idaho. 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 London to Idaho?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Idaho. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Idaho from London which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from London to Idaho?

momondo helps you find the best flight between London and Idaho by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from London to Idaho now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Idaho and let you know when they change.