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Cheap flights from Idaho to London 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 Idaho to London departing on 8/10. 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

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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.
Iberia Logo
12:45 pm - 12:50 pm
GEG
-
LHR
16h 05m
1 stop
Iberia Logo
6:15 am - 8:47 pm
LHR
-
GEG
22h 32m
2 stops
$867Iberia
Wed, Sep 9 - Wed, Oct 7
Iberia Logo
6:00 am - 6:20 am
GEG
-
LHR
16h 20m
1 stop
Iberia Logo
6:15 am - 8:47 pm
LHR
-
GEG
22h 32m
2 stops
$872Iberia
Wed, Aug 12 - Tue, Sep 15
Delta Logo
3:30 pm - 5:35 pm
BOI
-
LHR
19h 05m
1 stop
Delta Logo
6:30 am - 3:38 pm
LHR
-
BOI
16h 08m
2 stops
$876Delta
Wed, Sep 9 - Wed, Sep 16
Delta Logo
8:45 am - 10:20 am
BOI
-
LHR
18h 35m
2 stops
Delta Logo
6:30 am - 3:38 pm
LHR
-
BOI
16h 08m
2 stops
$881Delta
Wed, Sep 9 - Wed, Sep 16
Lufthansa Logo
12:25 pm - 10:40 pm
GEG
-
LHR
26h 15m
2 stops
Lufthansa Logo
9:30 am - 9:16 pm
LHR
-
GEG
19h 46m
2 stops
$898Lufthansa
Tue, May 5 - Tue, May 19
Lufthansa Logo
12:25 pm - 8:45 pm
GEG
-
LHR
24h 20m
2 stops
Lufthansa Logo
8:30 am - 9:16 pm
LHR
-
GEG
20h 46m
2 stops
$899Lufthansa
Tue, May 5 - Tue, May 19
American Airlines Logo
12:45 pm - 12:50 pm
GEG
-
LHR
16h 05m
1 stop
American Airlines Logo
8:55 am - 8:47 pm
LHR
-
GEG
19h 52m
1 stop
$902American Airlines
Wed, Sep 9 - Wed, Oct 7
American Airlines Logo
6:00 am - 6:20 am
GEG
-
LHR
16h 20m
1 stop
American Airlines Logo
8:55 am - 8:47 pm
LHR
-
GEG
19h 52m
1 stop
$904American Airlines
Wed, Aug 12 - Tue, Sep 15
Finnair Logo
6:44 am - 6:20 am
BOI
-
LHR
16h 36m
1 stop
Finnair Logo
12:55 pm - 10:17 pm
LHR
-
BOI
16h 22m
1 stop
$904Finnair
Mon, Aug 10 - Fri, Aug 21
Finnair Logo
1:18 pm - 10:50 am
BOI
-
LHR
14h 32m
1 stop
Finnair Logo
8:55 am - 10:17 pm
LHR
-
BOI
20h 22m
1 stop
$905Finnair
Wed, Sep 9 - Wed, Sep 16

Scandinavian Airlines flights from Idaho to London Heathrow Airport

Our best Scandinavian Airlines deals on Idaho to London Heathrow Airport flight tickets
Scandinavian Airlines
Sep 15
GEG10:50 amSpokane
23h 40m
2 stops
LHR6:30 pmLondon Heathrow
Sep 26
LHR6:40 amLondon Heathrow
20h 07m
2 stops
GEG6:47 pmSpokane
$941
Scandinavian Airlines
Sep 15
GEG10:50 amSpokane
21h 35m
3 stops
LHR4:25 pmLondon Heathrow
Sep 26
LHR6:40 amLondon Heathrow
18h 28m
3 stops
GEG5:08 pmSpokane
$961
Scandinavian Airlines
Aug 16
BOI10:23 amBoise Air Term. Gowen Fld
23h 02m
3 stops
LHR4:25 pmLondon Heathrow
Aug 26
LHR6:40 amLondon Heathrow
23h 24m
2 stops
BOI11:04 pmBoise Air Term. Gowen Fld
$1,003

Virgin Atlantic flights from Idaho to London Heathrow Airport

Our best Virgin Atlantic deals on Idaho to London Heathrow Airport flight tickets
Virgin Atlantic
Sep 1
GEG2:45 pmSpokane
16h 15m
1 stop
LHR3:00 pmLondon Heathrow
Sep 11
LHR11:30 amLondon Heathrow
20h 14m
2 stops
GEG11:44 pmSpokane
$943
Virgin Atlantic
May 11
JAC1:15 pmJackson Hole
23h 55m
2 stops
LHR8:10 pmLondon Heathrow
May 18
LHR11:45 amLondon Heathrow
39h 30m
2 stops
JAC8:15 pmJackson Hole
$971
Virgin Atlantic
May 12
IDA11:30 amIdaho Falls Fanning Field
17h 35m
2 stops
LHR12:05 pmLondon Heathrow
May 19
LHR11:40 amLondon Heathrow
18h 02m
2 stops
IDA10:42 pmIdaho Falls Fanning Field
$1,037

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 March 30, 2026.
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

Cheapest round-trip

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 9/9

12:45 pm-12:50 pm

1 stop16h 05m

London Heathrow

Wed 10/7

6:15 am-8:47 pm

2 stops22h 32m

$867

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 8/12

6:00 am-6:20 am

1 stop16h 20m

London Heathrow

Tue 9/15

6:15 am-8:47 pm

2 stops22h 32m

$872

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 9/9

3:30 pm-5:35 pm

1 stop19h 05m

London Heathrow

Wed 9/16

6:30 am-3:38 pm

2 stops16h 08m

$876

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 9/9

8:45 am-10:20 am

2 stops18h 35m

London Heathrow

Wed 9/16

6:30 am-3:38 pm

2 stops16h 08m

$881

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 5/5

12:25 pm-10:40 pm

2 stops26h 15m

London Heathrow

Tue 5/19

9:30 am-9:16 pm

2 stops19h 46m

$898

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 5/5

12:25 pm-8:45 pm

2 stops24h 20m

London Heathrow

Tue 5/19

8:30 am-9:16 pm

2 stops20h 46m

$899

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 9/9

12:45 pm-12:50 pm

1 stop16h 05m

London Heathrow

Wed 10/7

8:55 am-8:47 pm

1 stop19h 52m

$902

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 8/12

6:00 am-6:20 am

1 stop16h 20m

London Heathrow

Tue 9/15

8:55 am-8:47 pm

1 stop19h 52m

$904
Quickest round-trip

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Mon 8/10

6:44 am-6:20 am

1 stop16h 36m

London Heathrow

Fri 8/21

12:55 pm-10:17 pm

1 stop16h 22m

$904

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 9/9

1:18 pm-10:50 am

1 stop14h 32m

London Heathrow

Wed 9/16

8:55 am-10:17 pm

1 stop20h 22m

$905

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 August is, on average, the cheapest month to fly to London Heathrow Airport from Idaho, with most prices found around $797. If you’re not able to fly to London Heathrow Airport in August, then April is your next best option. Flight prices from Idaho to London Heathrow Airport during April average around $804.

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

You could potentially save up to 14% 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

Fastest flight time

12h 05m

Direct flights

None
The fastest flight from Idaho to London Heathrow Airport takes 12h 05m
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
7.8
1,480 reviews
Search KLM flights
Virgin AtlanticPriceFrom $604Free CancellationRating
7.5
685 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom $639Free CancellationRating
7.4
9,525 reviews
Search United Airlines flights
DeltaPriceFrom $678Free CancellationRating
7.9
8,364 reviews
Search Delta flights

Traveling to a place near London?

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

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

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