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Cheap flights from London Heathrow Airport to Idaho from $501

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Idaho departing on 1/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London Heathrow Airport to Idaho

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:15 pm - 11:01 pmLHR-BOI
17h 46m2 stops
Multiple Airlines Logo
6:28 am - 10:50 amBOI-LHR
21h 22m2 stops
$686Multiple Airlines
Find Deal
Mon, Feb 9 - Mon, Feb 16
United Airlines Logo
7:40 am - 9:59 amLHR-BOI
33h 19m2 stops
United Airlines Logo
1:50 pm - 1:30 pmBOI-LHR
16h 40m1 stop
$725United Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
United Airlines Logo
7:40 am - 9:59 amLHR-BOI
33h 19m2 stops
United Airlines Logo
10:35 am - 7:25 amBOI-LHR
13h 50m1 stop
$726United Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
Lufthansa Logo
7:40 am - 6:07 pmLHR-BOI
17h 27m2 stops
Lufthansa Logo
2:49 pm - 10:50 amBOI-LHR
37h 01m2 stops
$747Lufthansa
Find Deal
Tue, Dec 9 - Sun, Dec 14
Lufthansa Logo
7:40 am - 6:07 pmLHR-BOI
17h 27m2 stops
Lufthansa Logo
2:49 pm - 10:50 amBOI-LHR
37h 01m2 stops
$748Lufthansa
Find Deal
Tue, Dec 9 - Sun, Dec 14
Air Canada Logo
1:25 pm - 9:23 pmLHR-BOI
38h 58m2 stops
Air Canada Logo
5:10 pm - 11:20 amBOI-LHR
35h 10m2 stops
$795Air Canada
Find Deal
Mon, Feb 9 - Sun, Feb 15
Air Canada Logo
1:25 pm - 11:25 amLHR-BOI
29h 00m2 stops
Air Canada Logo
5:10 pm - 11:20 amBOI-LHR
35h 10m2 stops
$800Air Canada
Find Deal
Mon, Feb 9 - Sun, Feb 15
Scandinavian Airlines Logo
6:40 am - 11:04 pmLHR-BOI
23h 24m2 stops
Scandinavian Airlines Logo
1:00 pm - 9:35 pmBOI-LHR
25h 35m3 stops
$845Scandinavian Airlines
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Mon, Apr 20 - Mon, Apr 27
Delta Logo
6:20 am - 6:17 pmLHR-IDA
18h 57m2 stops
Delta Logo
6:00 am - 10:30 amIDA-LHR
21h 30m2 stops
$1,009Delta
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Sat, Nov 22 - Wed, Nov 26
Delta Logo
6:20 am - 10:33 pmLHR-IDA
23h 13m2 stops
Delta Logo
6:00 am - 7:05 amIDA-LHR
18h 05m2 stops
$1,010Delta
Find Deal
Sat, Nov 22 - Wed, Nov 26

United Airlines flights from London Heathrow Airport to Idaho

Our best United Airlines deals on London Heathrow Airport to Idaho flight tickets
United Airlines
Dec 8
LHR7:40 amLondon Heathrow
33h 19m
2 stops
BOI9:59 amBoise Air Term. Gowen Fld
Dec 15
BOI1:50 pmBoise Air Term. Gowen Fld
16h 40m
1 stop
LHR1:30 pmLondon Heathrow
$725
Find similar
United Airlines
Dec 8
LHR7:40 amLondon Heathrow
33h 19m
2 stops
BOI9:59 amBoise Air Term. Gowen Fld
Dec 15
BOI10:35 amBoise Air Term. Gowen Fld
13h 50m
1 stop
LHR7:25 amLondon Heathrow
$726
Find similar
United Airlines
Dec 8
LHR7:40 amLondon Heathrow
33h 19m
2 stops
BOI9:59 amBoise Air Term. Gowen Fld
Dec 15
BOI2:49 pmBoise Air Term. Gowen Fld
11h 51m
1 stop
LHR9:40 amLondon Heathrow
$727
Find similar

Lufthansa flights from London Heathrow Airport to Idaho

Our best Lufthansa deals on London Heathrow Airport to Idaho flight tickets
Lufthansa
Dec 9
LHR7:40 amLondon Heathrow
17h 27m
2 stops
BOI6:07 pmBoise Air Term. Gowen Fld
Dec 14
BOI2:49 pmBoise Air Term. Gowen Fld
37h 01m
2 stops
LHR10:50 amLondon Heathrow
$747
Find similar
Lufthansa
Dec 9
LHR7:40 amLondon Heathrow
17h 27m
2 stops
BOI6:07 pmBoise Air Term. Gowen Fld
Dec 14
BOI2:49 pmBoise Air Term. Gowen Fld
37h 01m
2 stops
LHR10:50 amLondon Heathrow
$748
Find similar
Lufthansa
Dec 9
LHR7:40 amLondon Heathrow
19h 03m
2 stops
BOI7:43 pmBoise Air Term. Gowen Fld
Dec 14
BOI2:49 pmBoise Air Term. Gowen Fld
32h 06m
2 stops
LHR5:55 amLondon Heathrow
$749
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London Heathrow Airport to Idaho that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 3, 2025.
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

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 2/9

12:15 pm-11:01 pm

2 stops17h 46m

Boise Air Term. Gowen Fld

Mon 2/16

6:28 am-10:50 am

2 stops21h 22m

$686

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 12/8

7:40 am-9:59 am

2 stops33h 19m

Boise Air Term. Gowen Fld

Mon 12/15

1:50 pm-1:30 pm

1 stop16h 40m

$725

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 12/8

7:40 am-9:59 am

2 stops33h 19m

Boise Air Term. Gowen Fld

Mon 12/15

10:35 am-7:25 am

1 stop13h 50m

$726

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 12/9

7:40 am-6:07 pm

2 stops17h 27m

Boise Air Term. Gowen Fld

Sun 12/14

2:49 pm-10:50 am

2 stops37h 01m

$747

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Tue 12/9

7:40 am-6:07 pm

2 stops17h 27m

Boise Air Term. Gowen Fld

Sun 12/14

2:49 pm-10:50 am

2 stops37h 01m

$748

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 2/9

1:25 pm-9:23 pm

2 stops38h 58m

Boise Air Term. Gowen Fld

Sun 2/15

5:10 pm-11:20 am

2 stops35h 10m

$795

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 2/9

1:25 pm-11:25 am

2 stops29h 00m

Boise Air Term. Gowen Fld

Sun 2/15

5:10 pm-11:20 am

2 stops35h 10m

$800

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 4/20

6:40 am-11:04 pm

2 stops23h 24m

Boise Air Term. Gowen Fld

Mon 4/27

1:00 pm-9:35 pm

3 stops25h 35m

$845

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/22

6:20 am-6:17 pm

2 stops18h 57m

Idaho Falls Fanning Field

Wed 11/26

6:00 am-10:30 am

2 stops21h 30m

$1,009

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 11/22

6:20 am-10:33 pm

2 stops23h 13m

Idaho Falls Fanning Field

Wed 11/26

6:00 am-7:05 am

2 stops18h 05m

$1,010

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Idaho from

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

What is the cheapest month to fly to Idaho?

In general, January 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 $756. If you don’t want to visit Idaho in January, then you should wait until November to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $789.

What is the cheapest day to depart on your flight to Idaho?

Our data shows that Thursday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $907. On the other hand, Sunday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,365.

What is the cheapest time of day to depart on your flight to Idaho?

According to our data, the cheapest time of day to fly to Idaho is at noon. momondo users have found flights departing from London Heathrow Airport to Idaho at noon for as low as $1,053. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the morning is when there is more demand to fly to Idaho, so prices are often more expensive at around $1,056 per ticket.

How far in advance should I book a flight to Idaho?

You are more likely to see cheaper flights to Idaho from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $935 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from London Heathrow Airport for as low as $770 on momondo.

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

Direct flights

None
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

  • 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.

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