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Cheap flights from Idaho to London from $297

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 12/7. 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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0 bags

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Find the cheapest flights from Idaho to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
10:36 am - 12:50 pmBOI-LHR
19h 14m1 stop
Virgin Atlantic Logo
12:20 pm - 6:28 pmLHR-BOI
13h 08m1 stop
$566Virgin Atlantic
Find Deal
Tue, Feb 17 - Thu, Feb 26
Virgin Atlantic Logo
4:49 pm - 12:50 pmBOI-LHR
13h 01m1 stop
Virgin Atlantic Logo
2:45 pm - 11:59 pmLHR-BOI
16h 14m1 stop
$567Virgin Atlantic
Find Deal
Tue, Feb 17 - Thu, Feb 26
Delta Logo
11:44 am - 10:30 amBOI-LHR
15h 46m1 stop
Delta Logo
6:20 am - 6:51 pmLHR-BOI
19h 31m2 stops
$590Delta
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Tue, Dec 2 - Tue, Dec 9
Multiple Airlines Logo
6:00 am - 7:05 amGEG-LHR
17h 05m1 stop
Multiple Airlines Logo
6:20 am - 3:40 pmLHR-GEG
17h 20m2 stops
$590Multiple Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
KLM Logo
1:16 pm - 11:40 amGEG-LHR
14h 24m1 stop
KLM Logo
6:30 am - 2:55 pmLHR-GEG
16h 25m2 stops
$591KLM
Find Deal
Wed, Nov 26 - Wed, Dec 3
Delta Logo
6:05 am - 7:05 amGEG-LHR
17h 00m2 stops
Delta Logo
6:20 am - 6:55 pmLHR-GEG
20h 35m2 stops
$594Delta
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Wed, Dec 3 - Wed, Dec 10
KLM Logo
6:00 am - 10:00 amGEG-LHR
20h 00m1 stop
KLM Logo
11:05 am - 8:10 pmLHR-GEG
17h 05m1 stop
$597KLM
Find Deal
Wed, Nov 26 - Wed, Dec 3
United Airlines Logo
5:00 am - 5:55 amBOI-LHR
17h 55m2 stops
United Airlines Logo
11:10 am - 11:48 pmLHR-BOI
19h 38m2 stops
$615United Airlines
Find Deal
Tue, Feb 17 - Thu, Feb 26
United Airlines Logo
4:25 pm - 7:10 amJAC-LHR
31h 45m2 stops
United Airlines Logo
6:35 am - 8:37 pmLHR-JAC
21h 02m2 stops
$617United Airlines
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Thu, Dec 4 - Thu, Dec 11
Multiple Airlines Logo
11:15 am - 10:30 amGEG-LHR
15h 15m2 stops
Multiple Airlines Logo
6:30 am - 2:57 pmLHR-GEG
16h 27m2 stops
$629Multiple Airlines
Find Deal
Thu, Feb 26 - Fri, Mar 6

Virgin Atlantic flights from Idaho to London Heathrow Airport

Our best Virgin Atlantic deals on Idaho to London Heathrow Airport flight tickets
Virgin Atlantic
Feb 17
BOI10:36 amBoise Air Term. Gowen Fld
19h 14m
1 stop
LHR12:50 pmLondon Heathrow
Feb 26
LHR12:20 pmLondon Heathrow
13h 08m
1 stop
BOI6:28 pmBoise Air Term. Gowen Fld
$566
Find similar
Virgin Atlantic
Feb 17
BOI4:49 pmBoise Air Term. Gowen Fld
13h 01m
1 stop
LHR12:50 pmLondon Heathrow
Feb 26
LHR2:45 pmLondon Heathrow
16h 14m
1 stop
BOI11:59 pmBoise Air Term. Gowen Fld
$567
Find similar
Virgin Atlantic
Dec 2
BOI5:35 amBoise Air Term. Gowen Fld
18h 15m
2 stops
LHR6:50 amLondon Heathrow
Dec 9
LHR6:20 amLondon Heathrow
19h 31m
2 stops
BOI6:51 pmBoise Air Term. Gowen Fld
$594
Find similar

KLM flights from Idaho to London Heathrow Airport

Our best KLM deals on Idaho to London Heathrow Airport flight tickets
KLM
Nov 26
GEG1:16 pmSpokane
14h 24m
1 stop
LHR11:40 amLondon Heathrow
Dec 3
LHR6:30 amLondon Heathrow
16h 25m
2 stops
GEG2:55 pmSpokane
$591
Find similar
KLM
Nov 26
GEG6:00 amSpokane
20h 00m
1 stop
LHR10:00 amLondon Heathrow
Dec 3
LHR11:05 amLondon Heathrow
17h 05m
1 stop
GEG8:10 pmSpokane
$597
Find similar
KLM
Feb 25
GEG9:55 amSpokane
16h 05m
1 stop
LHR10:00 amLondon Heathrow
Mar 6
LHR6:30 amLondon Heathrow
16h 27m
2 stops
GEG2:57 pmSpokane
$599
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated November 5, 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 2/17

10:36 am-12:50 pm

1 stop19h 14m

London Heathrow

Thu 2/26

12:20 pm-6:28 pm

1 stop13h 08m

$566

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

4:49 pm-12:50 pm

1 stop13h 01m

London Heathrow

Thu 2/26

2:45 pm-11:59 pm

1 stop16h 14m

$567

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 12/2

11:44 am-10:30 am

1 stop15h 46m

London Heathrow

Tue 12/9

6:20 am-6:51 pm

2 stops19h 31m

$590

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/3

6:00 am-7:05 am

1 stop17h 05m

London Heathrow

Wed 12/10

6:20 am-3:40 pm

2 stops17h 20m

$590

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 11/26

1:16 pm-11:40 am

1 stop14h 24m

London Heathrow

Wed 12/3

6:30 am-2:55 pm

2 stops16h 25m

$591

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/3

6:05 am-7:05 am

2 stops17h 00m

London Heathrow

Wed 12/10

6:20 am-6:55 pm

2 stops20h 35m

$594

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 11/26

6:00 am-10:00 am

1 stop20h 00m

London Heathrow

Wed 12/3

11:05 am-8:10 pm

1 stop17h 05m

$597

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/17

5:00 am-5:55 am

2 stops17h 55m

London Heathrow

Thu 2/26

11:10 am-11:48 pm

2 stops19h 38m

$615

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Thu 12/4

4:25 pm-7:10 am

2 stops31h 45m

London Heathrow

Thu 12/11

6:35 am-8:37 pm

2 stops21h 02m

$617

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Thu 2/26

11:15 am-10:30 am

2 stops15h 15m

London Heathrow

Fri 3/6

6:30 am-2:57 pm

2 stops16h 27m

$629

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 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?

The month of April is, on average, the cheapest month to fly to London Heathrow Airport from Idaho, with most prices found around $801. If you’re not able to fly to London Heathrow Airport in April, then August is your next best option. Flight prices from Idaho to London Heathrow Airport during August average around $807.

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

Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $854. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $1,110.

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 $891. 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 morning are often more expensive with an average ticket price of $1,011.

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 week ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $939 when searching week out. 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 $625 on momondo.

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

You could potentially save up to 8% on your flight if you consider stops on a Idaho to London Heathrow Airport flight.

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

Direct flights

None
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 refresh 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?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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
KLMPriceFrom $577Free CancellationRating
7.7
1,405 reviews
Search KLM flights
United AirlinesPriceFrom $639Free CancellationRating
7.4
9,000 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $695Free CancellationRating
7.5
671 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $701Free CancellationRating
7.9
8,004 reviews
Search Delta flights
American AirlinesPriceFrom $703Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Dover
Luton
Slough
Guildford
Hayes
Dartford
Stratford-upon-Avon
Crawley
Brentwood
Chelmsford
Salisbury
Wembley
Folkestone
Romford
Ilford
Cobham
Swindon

Why use momondo?

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

It is quick and easy to find Idaho to London 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 London that suits you.

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

All flight searches from Idaho to London on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Idaho to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Idaho to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
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