Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Idaho to London from £209

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho to London departing on 20/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Idaho to London

Cheap return flights

United Airlines Logo
17:39 - 12:20BOI-LHR
11h 41m1 stop
United Airlines Logo
06:55 - 22:30LHR-BOI
22h 35m2 stops
£457United Airlines
Find Deal
Tue, 23 Sep - Wed, 1 Oct
Air Canada Logo
09:45 - 13:20BOI-LHR
20h 35m2 stops
Air Canada Logo
14:30 - 23:28LHR-BOI
38h 58m2 stops
£459Air Canada
Find Deal
Sun, 19 Oct - Wed, 29 Oct
Delta Logo
09:00 - 11:20BOI-LHR
19h 20m1 stop
Delta Logo
11:30 - 23:57LHR-BOI
19h 27m2 stops
£461Delta
Find Deal
Tue, 23 Sep - Wed, 1 Oct
Logo
09:17 - 10:30GEG-LHR
17h 13m1 stop
Logo
06:20 - 16:07LHR-GEG
17h 47m2 stops
£461
Find Deal
Wed, 5 Nov - Wed, 19 Nov
Delta Logo
15:25 - 11:20GEG-LHR
11h 55m1 stop
Delta Logo
08:40 - 00:02LHR-GEG
23h 22m2 stops
£462Delta
Find Deal
Sun, 24 Aug - Fri, 5 Sep
Iberia Logo
13:33 - 10:50BOI-LHR
14h 17m1 stop
Iberia Logo
09:15 - 22:24LHR-BOI
43h 09m2 stops
£462Iberia
Find Deal
Sun, 19 Oct - Wed, 29 Oct
KLM Logo
13:00 - 10:30GEG-LHR
13h 30m1 stop
KLM Logo
06:30 - 14:42LHR-GEG
16h 12m2 stops
£462KLM
Find Deal
Wed, 28 Jan - Wed, 18 Feb
Iberia Logo
13:33 - 06:25BOI-LHR
33h 52m1 stop
Iberia Logo
09:15 - 22:24LHR-BOI
43h 09m2 stops
£466Iberia
Find Deal
Sat, 18 Oct - Wed, 29 Oct
KLM Logo
11:20 - 10:30GEG-LHR
15h 10m1 stop
KLM Logo
10:45 - 16:07LHR-GEG
13h 22m1 stop
£468KLM
Find Deal
Wed, 5 Nov - Wed, 19 Nov
Logo
16:46 - 14:15BOI-LHR
14h 29m1 stop
Logo
11:05 - 21:51LHR-BOI
16h 46m2 stops
£478
Find Deal
Sun, 19 Oct - Tue, 28 Oct

Delta flights from Idaho to London Heathrow Airport

Our best Delta deals on Idaho to London Heathrow Airport flight tickets
Delta
23 Sept
BOI09:00Boise Air Term. Gowen Fld
19h 20m
1 stop
LHR11:20London Heathrow
1 Oct
LHR11:30London Heathrow
19h 27m
2 stops
BOI23:57Boise Air Term. Gowen Fld
£461
Find similar
Delta
24 Aug
GEG15:25Spokane
11h 55m
1 stop
LHR11:20London Heathrow
5 Sept
LHR08:40London Heathrow
23h 22m
2 stops
GEG00:02Spokane
£462
Find similar
Delta
23 Sept
BOI11:32Boise Air Term. Gowen Fld
16h 53m
2 stops
LHR11:25London Heathrow
1 Oct
LHR06:15London Heathrow
16h 25m
2 stops
BOI15:40Boise Air Term. Gowen Fld
£465
Find similar

Finnair flights from Idaho to London Heathrow Airport

Our best Finnair deals on Idaho to London Heathrow Airport flight tickets
Finnair
23 Sept
BOI07:00Boise Air Term. Gowen Fld
16h 25m
1 stop
LHR06:25London Heathrow
1 Oct
LHR10:30London Heathrow
18h 18m
1 stop
BOI21:48Boise Air Term. Gowen Fld
£467
Find similar
Finnair
22 Sept
BOI06:59Boise Air Term. Gowen Fld
16h 26m
1 stop
LHR06:25London Heathrow
3 Oct
LHR12:00London Heathrow
16h 48m
1 stop
BOI21:48Boise Air Term. Gowen Fld
£480
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Idaho to London Heathrow Airport 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 13 August 2025.
Use the filters below to find and compare flights from Idaho to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 23/9

17:39-12:20

1 stop11h 41m

London Heathrow

Wed 1/10

06:55-22:30

2 stops22h 35m

£457

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 19/10

09:45-13:20

2 stops20h 35m

London Heathrow

Wed 29/10

14:30-23:28

2 stops38h 58m

£459

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 23/9

09:00-11:20

1 stop19h 20m

London Heathrow

Wed 1/10

11:30-23:57

2 stops19h 27m

£461

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 5/11

09:17-10:30

1 stop17h 13m

London Heathrow

Wed 19/11

06:20-16:07

2 stops17h 47m

£461

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 24/8

15:25-11:20

1 stop11h 55m

London Heathrow

Fri 5/9

08:40-00:02

2 stops23h 22m

£462

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 19/10

13:33-10:50

1 stop14h 17m

London Heathrow

Wed 29/10

09:15-22:24

2 stops43h 09m

£462

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 28/1

13:00-10:30

1 stop13h 30m

London Heathrow

Wed 18/2

06:30-14:42

2 stops16h 12m

£462

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sat 18/10

13:33-06:25

1 stop33h 52m

London Heathrow

Wed 29/10

09:15-22:24

2 stops43h 09m

£466

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 5/11

11:20-10:30

1 stop15h 10m

London Heathrow

Wed 19/11

10:45-16:07

1 stop13h 22m

£468

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 19/10

16:46-14:15

1 stop14h 29m

London Heathrow

Tue 28/10

11:05-21:51

2 stops16h 46m

£478

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to London from

How to get the cheapest flight ticket from Idaho to London Heathrow Airport

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 London Heathrow Airport?

In general, October is the cheapest month to fly from Idaho to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £518. The month of August is another great option to travel to London Heathrow Airport, with average flight prices from Idaho averaging around £599.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Idaho is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £541. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £1,113.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Idaho to London Heathrow Airport in the evening for as low as £507. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are £891 on average. Flights to London Heathrow Airport from Idaho at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Idaho when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £699 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Idaho for as low as £508 on momondo.

Cheap Idaho to London Heathrow Airport flight deals and tips

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

Best price found

£209

Fastest flight time

11h 24m

Direct flights

None
The best one-way flight to London Heathrow Airport from Idaho in the past 72 hours is £209. The best return flight deal from Idaho to London Heathrow Airport found on momondo in the last 72 hours is £457.
The fastest flight from Idaho to London Heathrow Airport takes 11h 24m
There are no direct flights from Idaho to London Heathrow Airport. Popular non-direct routes for this connection are Idaho Falls Fanning Field Airport - London Heathrow Airport, Spokane Airport - London Heathrow Airport and Boise Air Term. Gowen Fld Airport - London Heathrow Airport.
Search flight deals

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

    Prices for flights from Idaho to London Heathrow Airport are updated daily.

  • How many operators does momondo search for flights from Idaho to London Heathrow Airport?

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

    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 London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Idaho to London Heathrow Airport

Compare and see reviews for airlines that fly from Idaho to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
Virgin AtlanticPriceFrom £478Free CancellationRating
7.4
657 reviews
Search Virgin Atlantic flights

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Slough
Northampton
Maidstone
Southend-on-Sea
Swindon
Canterbury
Gatwick
Stratford-upon-Avon
Ipswich
Ilford
Guildford
Colchester
Dartford
Swanage
Hounslow
Worthing
Dover

Why use momondo?

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

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 London for you.

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

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

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

Once all potential Idaho to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

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

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 18/8
Mon 25/8
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London