Latest deals
Insights
FAQs
Price Alerts

Cheap flights from Idaho to London from £227

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 16/1. 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
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

Enter your travel dates to find the best prices.
Lufthansa Logo
07:00 - 12:00
GEG
-
LHR
21h 00m1 stop
Lufthansa Logo
07:40 - 21:18
LHR
-
GEG
20h 38m2 stops
£446Lufthansa
Wed, 4 Mar - Wed, 11 Mar
Lufthansa Logo
12:16 - 07:55
BOI
-
LHR
12h 39m1 stop
Lufthansa Logo
11:35 - 21:32
LHR
-
BOI
16h 57m1 stop
£450Lufthansa
Sat, 14 Feb - Sun, 22 Feb
Virgin Atlantic Logo
10:41 - 10:30
BOI
-
LHR
16h 49m1 stop
Virgin Atlantic Logo
14:30 - 20:10
LHR
-
BOI
12h 40m1 stop
£463Virgin Atlantic
Tue, 17 Feb - Thu, 26 Feb
Multiple Airlines Logo
06:53 - 11:50
GEG
-
LHR
20h 57m2 stops
Multiple Airlines Logo
06:35 - 19:16
LHR
-
GEG
20h 41m2 stops
£463Multiple Airlines
Thu, 15 Jan - Thu, 22 Jan
United Airlines Logo
16:19 - 07:30
IDA
-
LHR
32h 11m2 stops
United Airlines Logo
06:35 - 09:56
LHR
-
IDA
34h 21m2 stops
£464United Airlines
Thu, 15 Jan - Wed, 28 Jan
United Airlines Logo
10:53 - 07:25
BOI
-
LHR
13h 32m1 stop
United Airlines Logo
06:35 - 23:48
LHR
-
BOI
24h 13m2 stops
£464United Airlines
Tue, 17 Feb - Thu, 26 Feb
KLM Logo
05:15 - 10:00
GEG
-
LHR
20h 45m1 stop
KLM Logo
06:30 - 15:00
LHR
-
GEG
16h 30m2 stops
£464KLM
Wed, 14 Jan - Sat, 31 Jan
Virgin Atlantic Logo
12:58 - 20:10
JAC
-
LHR
24h 12m2 stops
Virgin Atlantic Logo
20:25 - 16:24
LHR
-
JAC
26h 59m2 stops
£465Virgin Atlantic
Fri, 16 Jan - Fri, 23 Jan
Multiple Airlines Logo
13:15 - 10:00
IDA
-
LHR
13h 45m1 stop
Multiple Airlines Logo
06:20 - 17:51
LHR
-
IDA
18h 31m2 stops
£469Multiple Airlines
Fri, 30 Jan - Fri, 6 Feb
KLM Logo
12:24 - 10:00
LWS
-
LHR
13h 36m1 stop
KLM Logo
17:50 - 20:59
LHR
-
LWS
35h 09m2 stops
£470KLM
Fri, 30 Jan - Fri, 6 Feb

Lufthansa flights from Idaho to London Heathrow Airport

Our best Lufthansa deals on Idaho to London Heathrow Airport flight tickets
Lufthansa
4 Mar
GEG07:00Spokane
21h 00m
1 stop
LHR12:00London Heathrow
9 Mar
LHR07:40London Heathrow
20h 38m
2 stops
GEG21:18Spokane
£446
Find similar
Lufthansa
14 Feb
BOI12:16Boise Air Term. Gowen Fld
12h 39m
1 stop
LHR07:55London Heathrow
22 Feb
LHR11:35London Heathrow
16h 57m
1 stop
BOI21:32Boise Air Term. Gowen Fld
£450
Find similar
Lufthansa
4 Mar
GEG13:44Spokane
19h 21m
2 stops
LHR17:05London Heathrow
9 Mar
LHR07:40London Heathrow
20h 38m
2 stops
GEG21:18Spokane
£452
Find similar

Virgin Atlantic flights from Idaho to London Heathrow Airport

Our best Virgin Atlantic deals on Idaho to London Heathrow Airport flight tickets
Virgin Atlantic
17 Feb
BOI10:41Boise Air Term. Gowen Fld
16h 49m
1 stop
LHR10:30London Heathrow
26 Feb
LHR14:30London Heathrow
12h 40m
1 stop
BOI20:10Boise Air Term. Gowen Fld
£463
Find similar
Virgin Atlantic
31 Dec
BOI05:50Boise Air Term. Gowen Fld
18h 15m
2 stops
LHR07:05London Heathrow
10 Jan
LHR12:20London Heathrow
16h 38m
1 stop
BOI21:58Boise Air Term. Gowen Fld
£638
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 18 December 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

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 4/3

07:00-12:00

1 stop21h 00m

London Heathrow

Wed 11/3

07:40-21:18

2 stops20h 38m

£446

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sat 14/2

12:16-07:55

1 stop12h 39m

London Heathrow

Sun 22/2

11:35-21:32

1 stop16h 57m

£450

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

10:41-10:30

1 stop16h 49m

London Heathrow

Thu 26/2

14:30-20:10

1 stop12h 40m

£463

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Thu 15/1

06:53-11:50

2 stops20h 57m

London Heathrow

Thu 22/1

06:35-19:16

2 stops20h 41m

£463

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Thu 15/1

16:19-07:30

2 stops32h 11m

London Heathrow

Wed 28/1

06:35-09:56

2 stops34h 21m

£464

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

10:53-07:25

1 stop13h 32m

London Heathrow

Thu 26/2

06:35-23:48

2 stops24h 13m

£464

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 14/1

05:15-10:00

1 stop20h 45m

London Heathrow

Sat 31/1

06:30-15:00

2 stops16h 30m

£464

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Fri 16/1

12:58-20:10

2 stops24h 12m

London Heathrow

Fri 23/1

20:25-16:24

2 stops26h 59m

£465

Idaho FallsLondon

IDA - LHR

IDALHR

Idaho Falls Fanning Field

Fri 30/1

13:15-10:00

1 stop13h 45m

London Heathrow

Fri 6/2

06:20-17:51

2 stops18h 31m

£469

LewistonLondon

LWS - LHR

LWSLHR

Lewiston Nez Perce Rgnl

Fri 30/1

12:24-10:00

1 stop13h 36m

London Heathrow

Fri 6/2

17:50-20:59

2 stops35h 09m

£470

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, February 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 £584. The month of April is another great option to travel to London Heathrow Airport, with average flight prices from Idaho averaging around £594.

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 £545. 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 £1,121.

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 £511. 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 £898 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.

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

Fastest flight time

12h 00m

Direct flights

None
The fastest flight from Idaho to London Heathrow Airport takes 12h 00m
There are no direct flights from Idaho to London Heathrow Airport. There are no popular flight routes from Idaho to 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 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.

Travelling to a place near London?

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

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
Sat 17/1
Sat 24/1
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London