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

Lufthansa, United Airlines, and Delta are the most popular carriers 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.

$562 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.

12:20 pm - 8:02 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

14h 42m1 stop Seattle/Tacoma Intl

2:05 pm - 10:40 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

13h 35m1 stop Seattle/Tacoma Intl

$829Multiple Airlines

Mon, Nov 2 - Thu, Dec 3

12:20 pm - 8:02 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

14h 42m1 stop Seattle/Tacoma Intl

6:37 am - 7:45 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

18h 08m2 stops Seattle/Tacoma Intl Detroit Metropolitan Wayne County

$840Multiple Airlines

Mon, Nov 2 - Thu, Dec 3

8:55 am - 9:11 pmLHR London Heathrow-GEG Spokane

20h 16m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

6:00 am - 10:40 amGEG Spokane-LHR London Heathrow

20h 40m1 stop Seattle/Tacoma Intl

$875Multiple Airlines

Mon, Dec 14 - Mon, Dec 28

12:20 pm - 10:06 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

15h 46m1 stop Seattle/Tacoma Intl

1:53 pm - 10:40 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

13h 47m1 stop Seattle/Tacoma Intl

$895Multiple Airlines

Wed, Oct 28 - Wed, Nov 4

8:55 am - 9:11 pmLHR London Heathrow-GEG Spokane

20h 16m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

1:21 pm - 10:40 amGEG Spokane-LHR London Heathrow

13h 19m1 stop Seattle/Tacoma Intl

$901Multiple Airlines

Mon, Dec 14 - Tue, Dec 29

12:20 pm - 9:11 pmLHR London Heathrow-GEG Spokane

16h 51m1 stop Seattle/Tacoma Intl

6:00 am - 10:40 amGEG Spokane-LHR London Heathrow

20h 40m1 stop Seattle/Tacoma Intl

$903Multiple Airlines

Mon, Dec 14 - Mon, Dec 28

12:20 pm - 9:11 pmLHR London Heathrow-GEG Spokane

16h 51m1 stop Seattle/Tacoma Intl

1:21 pm - 10:40 amGEG Spokane-LHR London Heathrow

13h 19m1 stop Seattle/Tacoma Intl

$903Multiple Airlines

Tue, Dec 15 - Tue, Dec 29

5:00 pm - 11:39 amLHR London Heathrow-GEG Spokane

26h 39m1 stop Seattle/Tacoma Intl

5:43 pm - 3:05 pmGEG Spokane-LHR London Heathrow

13h 22m1 stop Seattle/Tacoma Intl

$911Alaska Airlines

Mon, Oct 5 - Mon, Oct 19

1:30 pm - 6:03 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

34h 33m2 stops Frankfurt am Main Denver Intl

7:10 pm - 9:40 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

31h 30m2 stops San Francisco Denver Intl

$915United Airlines

Tue, Oct 27 - Tue, Nov 3

9:50 am - 9:11 pmLHR London Heathrow-GEG Spokane

19h 21m2 stops Minneapolis St Paul Seattle/Tacoma Intl

1:21 pm - 10:40 amGEG Spokane-LHR London Heathrow

13h 19m1 stop Seattle/Tacoma Intl

$917Multiple Airlines

Tue, Dec 15 - Sun, Dec 27

Cheap last minute flights

Enter your travel dates to find the best prices.

8:25 pm - 8:40 pmLHR London Heathrow-JAC Jackson Hole

31h 15m2 stops Munich Franz Josef Strauss Denver Intl

2:48 pm - 12:35 pmJAC Jackson Hole-LHR London Heathrow

14h 47m1 stop Denver Intl

$1,538Lufthansa

Sun, Sep 20 - Wed, Oct 21

9:25 pm - 11:22 amLHR London Heathrow-JAC Jackson Hole

44h 57m2 stops Reykjavik Keflavik Intl Seattle/Tacoma Intl

2:48 pm - 4:40 pmJAC Jackson Hole-LHR London Heathrow

18h 52m2 stops Denver Intl Frankfurt am Main

$1,553Multiple Airlines

Sun, Sep 20 - Wed, Oct 21

11:25 am - 8:40 pmLHR London Heathrow-JAC Jackson Hole

16h 15m1 stop Denver Intl

2:48 pm - 12:35 pmJAC Jackson Hole-LHR London Heathrow

14h 47m1 stop Denver Intl

$1,577Lufthansa

Sun, Sep 20 - Wed, Oct 21

9:25 pm - 10:38 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

56h 13m2 stops Reykjavik Keflavik Intl Seattle/Tacoma Intl

1:15 pm - 11:55 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 40m2 stops Seattle/Tacoma Intl Reykjavik Keflavik Intl

$5,912Icelandair

Sat, Sep 19 - Sat, Sep 26

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

19h 00m3 stops Stockholm Arlanda Kastrup Copenhagen Seattle/Tacoma Intl

10:34 am - 5:40 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

24h 06m2 stops Seattle/Tacoma Intl Kastrup Copenhagen

$7,917Scandinavian Airlines

Sat, Sep 19 - Sat, Sep 26

5:00 pm - 11:44 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

13h 44m1 stop Seattle/Tacoma Intl

10:00 am - 3:05 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

22h 05m1 stop Seattle/Tacoma Intl

$10,321Alaska Airlines

Sat, Sep 19 - Sat, Sep 26

5:00 pm - 9:09 amLHR London Heathrow-BOI Boise Air Term. Gowen Fld

23h 09m2 stops Seattle/Tacoma Intl Spokane

4:20 pm - 3:05 pmBOI Boise Air Term. Gowen Fld-LHR London Heathrow

15h 45m1 stop Seattle/Tacoma Intl

$10,326Alaska Airlines

Sat, Sep 19 - Sat, Sep 26

8:30 am - 9:37 pmLHR London Heathrow-BOI Boise Air Term. Gowen Fld

20h 07m3 stops Toronto Pearson Intl Chicago O'Hare Intl Denver Intl

5:00 am - 6:35 amBOI Boise Air Term. Gowen Fld-LHR London Heathrow

18h 35m3 stops Denver Intl Chicago O'Hare Intl Toronto Pearson Intl

$22,462Air Canada

Sat, Sep 19 - Sat, Sep 26

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United Airlines flights from London Heathrow Airport to Idaho

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

United Airlines

Oct 27

LHR1:30 pmLondon Heathrow

34h 33m

2 stops

BOI6:03 pmBoise Air Term. Gowen Fld

Nov 3

BOI7:10 pmBoise Air Term. Gowen Fld

31h 30m

2 stops

LHR9:40 amLondon Heathrow

$915

United Airlines

Nov 2

LHR3:20 pmLondon Heathrow

32h 22m

2 stops

BOI4:42 pmBoise Air Term. Gowen Fld

Dec 3

BOI6:15 amBoise Air Term. Gowen Fld

16h 40m

2 stops

LHR5:55 amLondon Heathrow

$926

United Airlines

Dec 6

LHR7:30 amLondon Heathrow

46h 45m

2 stops

GEG10:15 pmSpokane

Dec 27

GEG7:45 amSpokane

41h 55m

2 stops

LHR9:40 amLondon Heathrow

$997

Lufthansa flights from London Heathrow Airport to Idaho

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

Lufthansa

Nov 21

LHR7:30 amLondon Heathrow

21h 04m

2 stops

BOI9:34 pmBoise Air Term. Gowen Fld

Nov 28

BOI2:51 pmBoise Air Term. Gowen Fld

11h 49m

1 stop

LHR9:40 amLondon Heathrow

$1,035

Lufthansa

Oct 28

LHR6:30 amLondon Heathrow

20h 27m

2 stops

JAC8:57 pmJackson Hole

Nov 4

JAC2:25 pmJackson Hole

12h 15m

1 stop

LHR9:40 amLondon Heathrow

$1,237

Lufthansa

Oct 2

LHR11:05 amLondon Heathrow

31h 16m

1 stop

JAC11:21 amJackson Hole

Oct 11

JAC5:35 pmJackson Hole

34h 35m

1 stop

LHR11:10 amLondon Heathrow

$1,259

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

Quickest round-trip

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 11/2

12:20 pm-8:02 pm

1 stop14h 42m

Boise Air Term. Gowen Fld

Thu 12/3

2:05 pm-10:40 am

1 stop13h 35m

$829

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Mon 11/2

12:20 pm-8:02 pm

1 stop14h 42m

Boise Air Term. Gowen Fld

Thu 12/3

6:37 am-7:45 am

2 stops18h 08m

$840

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 12/14

8:55 am-9:11 pm

2 stops20h 16m

Spokane

Mon 12/28

6:00 am-10:40 am

1 stop20h 40m

$875

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Wed 10/28

12:20 pm-10:06 pm

1 stop15h 46m

Boise Air Term. Gowen Fld

Wed 11/4

1:53 pm-10:40 am

1 stop13h 47m

$895

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 12/14

8:55 am-9:11 pm

2 stops20h 16m

Spokane

Tue 12/29

1:21 pm-10:40 am

1 stop13h 19m

$901

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 12/14

12:20 pm-9:11 pm

1 stop16h 51m

Spokane

Mon 12/28

6:00 am-10:40 am

1 stop20h 40m

$903

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Tue 12/15

12:20 pm-9:11 pm

1 stop16h 51m

Spokane

Tue 12/29

1:21 pm-10:40 am

1 stop13h 19m

$903

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Mon 10/5

5:00 pm-11:39 am

1 stop26h 39m

Spokane

Mon 10/19

5:43 pm-3:05 pm

1 stop13h 22m

$911

LondonBoise

LHR London Heathrow - BOI Boise Air Term. Gowen Fld

LHRBOI

London Heathrow

Tue 10/27

1:30 pm-6:03 pm

2 stops34h 33m

Boise Air Term. Gowen Fld

Tue 11/3

7:10 pm-9:40 am

2 stops31h 30m

$915

LondonSpokane

LHR London Heathrow - GEG Spokane

LHRGEG

London Heathrow

Tue 12/15

9:50 am-9:11 pm

2 stops19h 21m

Spokane

Sun 12/27

1:21 pm-10:40 am

1 stop13h 19m

$917

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, March 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 $854. If you don’t want to visit Idaho in March, then you should wait until November to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $887.

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

You could potentially save up to 6% 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	$562
Fastest flight time	14h 18m
Direct flights	None

The best one-way flight to Idaho from London Heathrow Airport in the past 72 hours is $562. The best round-trip flight deal from London Heathrow Airport to Idaho found on momondo in the last 72 hours is $829.

The fastest flight from London Heathrow Airport to Idaho takes 14h 18m

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.