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Cheap flights from Idaho to London from $330

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 9/15. 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.
United Airlines Logo
6:20 am - 11:15 am
BOI
-
LHR
21h 55m
1 stop
United Airlines Logo
6:50 am - 11:06 pm
LHR
-
BOI
23h 16m
2 stops
$748United Airlines
Tue, Nov 10 - Thu, Nov 12
United Airlines Logo
11:30 am - 12:00 pm
GEG
-
LHR
16h 30m
1 stop
United Airlines Logo
6:35 am - 9:09 pm
LHR
-
GEG
22h 34m
2 stops
$750United Airlines
Tue, Nov 10 - Thu, Nov 12
United Airlines Logo
11:30 am - 12:00 pm
GEG
-
LHR
16h 30m
1 stop
United Airlines Logo
6:35 am - 9:09 pm
LHR
-
GEG
22h 34m
2 stops
$751United Airlines
Tue, Nov 10 - Thu, Nov 12
United Airlines Logo
11:45 am - 12:00 pm
BOI
-
LHR
17h 15m
2 stops
United Airlines Logo
9:30 am - 9:15 pm
LHR
-
BOI
18h 45m
2 stops
$765United Airlines
Tue, Nov 10 - Thu, Nov 12
Lufthansa Logo
12:50 pm - 7:25 am
GEG
-
LHR
34h 35m
1 stop
Lufthansa Logo
7:25 am - 10:30 am
LHR
-
GEG
35h 05m
2 stops
$811Lufthansa
Tue, Oct 13 - Fri, Oct 16
Delta Logo
6:25 am - 3:35 pm
LWS
-
LHR
25h 10m
1 stop
Delta Logo
11:45 am - 11:42 am
LHR
-
LWS
31h 57m
2 stops
$878Delta
Sun, Sep 13 - Wed, Sep 23
Virgin Atlantic Logo
2:02 pm - 1:15 pm
BOI
-
LHR
16h 13m
1 stop
Virgin Atlantic Logo
6:30 am - 5:52 pm
LHR
-
BOI
18h 22m
2 stops
$878Virgin Atlantic
Tue, Aug 18 - Thu, Aug 27
Delta Logo
3:25 pm - 1:05 pm
BOI
-
LHR
14h 40m
1 stop
Delta Logo
6:30 am - 6:33 pm
LHR
-
BOI
19h 03m
2 stops
$879Delta
Tue, Sep 29 - Wed, Oct 7
Multiple Airlines Logo
5:00 am - 6:30 am
BOI
-
LHR
18h 30m
2 stops
Multiple Airlines Logo
7:25 am - 9:31 pm
LHR
-
BOI
21h 06m
2 stops
$882Multiple Airlines
Tue, Oct 13 - Tue, Oct 20
Multiple Airlines Logo
1:42 pm - 12:50 pm
JAC
-
LHR
16h 08m
2 stops
Multiple Airlines Logo
8:00 am - 5:53 pm
LHR
-
JAC
16h 53m
2 stops
$1,171Multiple Airlines
Tue, Jul 7 - Wed, Jul 15

American Airlines flights from Idaho to London Heathrow Airport

Our best American Airlines deals on Idaho to London Heathrow Airport flight tickets
American Airlines
Jul 7
IDA1:53 pmIdaho Falls Fanning Field
14h 02m
1 stop
LHR10:55 amLondon Heathrow
Jul 15
LHR12:55 pmLondon Heathrow
16h 16m
1 stop
IDA10:11 pmIdaho Falls Fanning Field
$1,339
American Airlines
May 17
BOI2:14 pmBoise Air Term. Gowen Fld
13h 36m
1 stop
LHR10:50 amLondon Heathrow
May 19
LHR12:55 pmLondon Heathrow
16h 43m
1 stop
BOI10:38 pmBoise Air Term. Gowen Fld
$1,508
American Airlines
Jul 11
JAC11:50 amJackson Hole
15h 40m
2 stops
LHR10:30 amLondon Heathrow
Jul 18
LHR10:05 amLondon Heathrow
16h 37m
1 stop
JAC7:42 pmJackson Hole
$1,547

Air Canada flights from Idaho to London Heathrow Airport

Our best Air Canada deals on Idaho to London Heathrow Airport flight tickets
Air Canada
Sep 15
GEG1:37 pmSpokane
35h 58m
2 stops
LHR9:35 amLondon Heathrow
Sep 25
LHR3:05 pmLondon Heathrow
39h 11m
2 stops
GEG10:16 pmSpokane
$892
Air Canada
Aug 11
GEG1:37 pmSpokane
36h 23m
2 stops
LHR10:00 amLondon Heathrow
Aug 28
LHR3:05 pmLondon Heathrow
35h 46m
2 stops
GEG6:51 pmSpokane
$893
Air Canada
Sep 18
GEG1:37 pmSpokane
58h 58m
2 stops
LHR8:35 amLondon Heathrow
Sep 25
LHR3:05 pmLondon Heathrow
39h 11m
2 stops
GEG10:16 pmSpokane
$897

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 May 15, 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

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 11/10

6:20 am-11:15 am

1 stop21h 55m

London Heathrow

Thu 11/12

6:50 am-11:06 pm

2 stops23h 16m

$748

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 11/10

11:30 am-12:00 pm

1 stop16h 30m

London Heathrow

Thu 11/12

6:35 am-9:09 pm

2 stops22h 34m

$750

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 11/10

11:30 am-12:00 pm

1 stop16h 30m

London Heathrow

Thu 11/12

6:35 am-9:09 pm

2 stops22h 34m

$751

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 11/10

11:45 am-12:00 pm

2 stops17h 15m

London Heathrow

Thu 11/12

9:30 am-9:15 pm

2 stops18h 45m

$765

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 10/13

12:50 pm-7:25 am

1 stop34h 35m

London Heathrow

Fri 10/16

7:25 am-10:30 am

2 stops35h 05m

$811

LewistonLondon

LWS - LHR

LWSLHR

Lewiston Nez Perce Rgnl

Sun 9/13

6:25 am-3:35 pm

1 stop25h 10m

London Heathrow

Wed 9/23

11:45 am-11:42 am

2 stops31h 57m

$878

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 8/18

2:02 pm-1:15 pm

1 stop16h 13m

London Heathrow

Thu 8/27

6:30 am-5:52 pm

2 stops18h 22m

$878

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 9/29

3:25 pm-1:05 pm

1 stop14h 40m

London Heathrow

Wed 10/7

6:30 am-6:33 pm

2 stops19h 03m

$879

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 10/13

5:00 am-6:30 am

2 stops18h 30m

London Heathrow

Tue 10/20

7:25 am-9:31 pm

2 stops21h 06m

$882
Quickest round-trip

JacksonLondon

JAC - LHR

JACLHR

Jackson Hole

Tue 7/7

1:42 pm-12:50 pm

2 stops16h 08m

London Heathrow

Wed 7/15

8:00 am-5:53 pm

2 stops16h 53m

$1,171

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 July is, on average, the cheapest month to fly to London Heathrow Airport from Idaho, with most prices found around $577. If you’re not able to fly to London Heathrow Airport in July, then December is your next best option. Flight prices from Idaho to London Heathrow Airport during December average around $596.

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

You could potentially save up to 20% 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 17m

Direct flights

None
The fastest flight from Idaho to London Heathrow Airport takes 12h 17m
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

Frequently asked questions about flying from Idaho to London Heathrow Airport

  • 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
Virgin AtlanticPriceFrom $600Free CancellationRating
7.4
688 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom $639Free CancellationRating
7.4
9,729 reviews
Search United Airlines flights
DeltaPriceFrom $678Free CancellationRating
7.9
8,455 reviews
Search Delta flights

Traveling to a place near London?

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

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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