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Cheap flights from London Heathrow Airport to Idaho from £334

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 29/8. 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 return flights

Lufthansa Logo
07:25 - 21:03LHR-GEG
21h 38m2 stops
Lufthansa Logo
12:35 - 10:25GEG-LHR
13h 50m1 stop
£518Lufthansa
Find Deal
Wed, 10 Sep - Wed, 17 Sep
United Airlines Logo
07:25 - 23:05LHR-GEG
23h 40m2 stops
United Airlines Logo
16:00 - 20:40GEG-LHR
20h 40m2 stops
£522United Airlines
Find Deal
Sun, 14 Sep - Sun, 21 Sep
Lufthansa Logo
11:25 - 21:03LHR-GEG
17h 38m1 stop
Lufthansa Logo
07:23 - 10:25GEG-LHR
19h 02m1 stop
£540Lufthansa
Find Deal
Wed, 10 Sep - Wed, 17 Sep
United Airlines Logo
13:05 - 23:05LHR-GEG
18h 00m2 stops
United Airlines Logo
05:15 - 05:55GEG-LHR
16h 40m2 stops
£543United Airlines
Find Deal
Mon, 15 Sep - Mon, 22 Sep
United Airlines Logo
11:25 - 21:03LHR-GEG
17h 38m1 stop
United Airlines Logo
16:00 - 12:20GEG-LHR
12h 20m1 stop
£546United Airlines
Find Deal
Sun, 14 Sep - Sun, 21 Sep
United Airlines Logo
07:40 - 09:59LHR-BOI
33h 19m2 stops
United Airlines Logo
14:49 - 09:40BOI-LHR
11h 51m1 stop
£556United Airlines
Find Deal
Mon, 8 Dec - Tue, 16 Dec
Virgin Atlantic Logo
13:25 - 20:16LHR-BOI
13h 51m1 stop
Virgin Atlantic Logo
16:46 - 14:15BOI-LHR
14h 29m1 stop
£620Virgin Atlantic
Find Deal
Mon, 6 Oct - Mon, 13 Oct
British Airways Logo
09:45 - 21:25LHR-IDA
18h 40m2 stops
British Airways Logo
13:35 - 12:15IDA-LHR
15h 40m2 stops
£728British Airways
Find Deal
Sat, 13 Sep - Sat, 20 Sep
British Airways Logo
09:15 - 21:25LHR-IDA
19h 10m2 stops
British Airways Logo
13:35 - 06:25IDA-LHR
33h 50m1 stop
£729British Airways
Find Deal
Sat, 13 Sep - Sat, 20 Sep
KLM Logo
06:30 - 14:45LHR-GEG
16h 15m2 stops
KLM Logo
13:00 - 09:50GEG-LHR
12h 50m1 stop
£1,045KLM
Find Deal
Mon, 11 Aug - Fri, 22 Aug

Icelandair flights from London Heathrow Airport to Idaho

Our best Icelandair deals on London Heathrow Airport to Idaho flight tickets
Icelandair
27 Aug
LHR13:05London Heathrow
18h 06m
2 stops
GEG23:11Spokane
3 Sept
GEG20:51Spokane
39h 29m
2 stops
LHR20:20London Heathrow
£604
Find similar
Icelandair
27 Aug
LHR13:05London Heathrow
16h 35m
2 stops
BOI22:40Boise Air Term. Gowen Fld
3 Sept
BOI11:22Boise Air Term. Gowen Fld
17h 33m
2 stops
LHR11:55London Heathrow
£611
Find similar
Icelandair
14 Aug
LHR21:25London Heathrow
55h 44m
2 stops
GEG21:09Spokane
21 Aug
GEG16:35Spokane
35h 20m
2 stops
LHR11:55London Heathrow
£719
Find similar

Air Canada flights from London Heathrow Airport to Idaho

Our best Air Canada deals on London Heathrow Airport to Idaho flight tickets
Air Canada
28 Oct
LHR15:00London Heathrow
38h 28m
2 stops
BOI23:28Boise Air Term. Gowen Fld
10 Nov
BOI14:31Boise Air Term. Gowen Fld
32h 59m
2 stops
LHR06:30London Heathrow
£586
Find similar
Air Canada
8 Dec
LHR13:25London Heathrow
40h 20m
2 stops
BOI22:45Boise Air Term. Gowen Fld
16 Dec
BOI06:20Boise Air Term. Gowen Fld
17h 50m
2 stops
LHR07:10London Heathrow
£592
Find similar
Air Canada
28 Oct
LHR14:30London Heathrow
29h 14m
2 stops
BOI13:44Boise Air Term. Gowen Fld
16 Nov
BOI06:15Boise Air Term. Gowen Fld
19h 15m
2 stops
LHR08:30London Heathrow
£616
Find similar

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 1 August 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

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 10/9

07:25-21:03

2 stops21h 38m

Spokane

Wed 17/9

12:35-10:25

1 stop13h 50m

£518

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 14/9

07:25-23:05

2 stops23h 40m

Spokane

Sun 21/9

16:00-20:40

2 stops20h 40m

£522

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Wed 10/9

11:25-21:03

1 stop17h 38m

Spokane

Wed 17/9

07:23-10:25

1 stop19h 02m

£540

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 15/9

13:05-23:05

2 stops18h 00m

Spokane

Mon 22/9

05:15-05:55

2 stops16h 40m

£543

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Sun 14/9

11:25-21:03

1 stop17h 38m

Spokane

Sun 21/9

16:00-12:20

1 stop12h 20m

£546

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 8/12

07:40-09:59

2 stops33h 19m

Boise Air Term. Gowen Fld

Tue 16/12

14:49-09:40

1 stop11h 51m

£556

LondonBoise

LHR - BOI

LHRBOI

London Heathrow

Mon 6/10

13:25-20:16

1 stop13h 51m

Boise Air Term. Gowen Fld

Mon 13/10

16:46-14:15

1 stop14h 29m

£620

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 13/9

09:45-21:25

2 stops18h 40m

Idaho Falls Fanning Field

Sat 20/9

13:35-12:15

2 stops15h 40m

£728

LondonIdaho Falls

LHR - IDA

LHRIDA

London Heathrow

Sat 13/9

09:15-21:25

2 stops19h 10m

Idaho Falls Fanning Field

Sat 20/9

13:35-06:25

1 stop33h 50m

£729

LondonSpokane

LHR - GEG

LHRGEG

London Heathrow

Mon 11/8

06:30-14:45

2 stops16h 15m

Spokane

Fri 22/8

13:00-09:50

1 stop12h 50m

£1,045

Flights are sorted by cheapest return 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?

The month of January is, on average, the cheapest month to fly to Idaho from London Heathrow Airport, with most prices found around £566. If you’re not able to fly to Idaho in January, then November is your next best option. Flight prices from London Heathrow Airport to Idaho during November average around £590.

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

On average, the least expensive day to fly to Idaho from London Heathrow Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £637. However, this price may fluctuate depending on the airline, the season, and holidays. 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 travellers. As a result, prices tend to be around £878.

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 midday. momondo users have found flights departing from London Heathrow Airport to Idaho at midday for as low as £657. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive, with an average ticket price of £851.

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 £705 when searching weeks before you fly. 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 £578 on momondo.

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

You could potentially save up to 32% 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

£334

Fastest flight time

12h 49m

Direct flights

None

Airports in Idaho

5 airports
The best one-way flight to Idaho from London Heathrow Airport in the past 72 hours is £334. The best return flight deal from London Heathrow Airport to Idaho found on momondo in the last 72 hours is £518.
The fastest flight from London Heathrow Airport to Idaho takes 12h 49m
There are no direct flights from London Heathrow Airport to Idaho. Popular non-direct routes for this connection are London Heathrow Airport - Boise Air Term. Gowen Fld Airport, London Heathrow Airport - Spokane Airport and London Heathrow Airport - Idaho Falls Fanning Field Airport.
There are 5 airports near Idaho: Idaho Falls Fanning Field (IDA), Spokane (GEG), Boise Air Term. Gowen Fld (BOI), Hailey Sun Valley-Friedman (SUN), Jackson Hole (JAC)
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  • 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 many operators does momondo search for flights from London Heathrow Airport to Idaho?

  • 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 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 London Heathrow Airport to Idaho.

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

    The travel and health documents you'll need for your trip to Idaho may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Idaho. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from London Heathrow Airport to Idaho

Compare and see reviews for airlines that fly from London Heathrow Airport to Idaho with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom £538Free CancellationRating
7.8
1,383 reviews
Search KLM flights
LufthansaPriceFrom £545Free CancellationRating
6.8
7,275 reviews
Search Lufthansa flights
FinnairPriceFrom £545Free CancellationRating
7.6
1,316 reviews
Search Finnair flights
United AirlinesPriceFrom £548Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom £611Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £679Free CancellationRating
6.6
7,222 reviews
Search British Airways flights

Why use momondo?

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

It is quick and easy to find London to Idaho flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Idaho that suits you.

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

Yes. momondo enables you to select and highlight flights to Idaho from London with this policy.

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

momondo provides multiple filters to help you find the best flight to Idaho from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for London to Idaho flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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