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Cheap flights from Idaho to London from £261

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 10/3. 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 return flights

Enter your travel dates to find the best prices.
United Airlines Logo
10:49 - 07:25
BOI
-
LHR
14h 36m
1 stop
United Airlines Logo
06:50 - 22:56
LHR
-
BOI
22h 06m
2 stops
£462United Airlines
Wed, 11 Mar - Mon, 16 Mar
United Airlines Logo
05:00 - 05:55
BOI
-
LHR
18h 55m
2 stops
United Airlines Logo
07:40 - 17:46
LHR
-
BOI
40h 06m
2 stops
£465United Airlines
Wed, 11 Mar - Mon, 16 Mar
Lufthansa Logo
14:37 - 17:40
BOI
-
LHR
20h 03m
2 stops
Lufthansa Logo
07:30 - 21:22
LHR
-
BOI
20h 52m
2 stops
£473Lufthansa
Wed, 15 Apr - Wed, 22 Apr
Scandinavian Airlines Logo
06:09 - 15:35
LWS
-
LHR
25h 26m
1 stop
Scandinavian Airlines Logo
09:55 - 00:08
LHR
-
LWS
22h 13m
2 stops
£473Scandinavian Airlines
Wed, 29 Apr - Wed, 6 May
Delta Logo
07:05 - 10:15
BOI
-
LHR
20h 10m
1 stop
Delta Logo
06:30 - 16:14
LHR
-
BOI
16h 44m
2 stops
£474Delta
Sun, 5 Apr - Tue, 21 Apr
Delta Logo
19:38 - 15:35
GEG
-
LHR
11h 57m
1 stop
Delta Logo
08:40 - 21:13
LHR
-
GEG
20h 33m
2 stops
£474Delta
Sun, 26 Apr - Fri, 15 May
Air Canada Logo
06:00 - 11:20
GEG
-
LHR
22h 20m
2 stops
Air Canada Logo
13:25 - 21:59
LHR
-
GEG
39h 34m
2 stops
£475Air Canada
Sun, 8 Mar - Sun, 15 Mar
Air Canada Logo
07:10 - 08:35
GEG
-
LHR
17h 25m
2 stops
Air Canada Logo
14:05 - 18:36
LHR
-
GEG
36h 31m
2 stops
£481Air Canada
Wed, 22 Apr - Fri, 8 May
Scandinavian Airlines Logo
07:05 - 16:50
BOI
-
LHR
27h 45m
1 stop
Scandinavian Airlines Logo
14:30 - 22:04
LHR
-
BOI
13h 34m
1 stop
£483Scandinavian Airlines
Wed, 11 Mar - Mon, 16 Mar
Lufthansa Logo
12:35 - 17:55
GEG
-
LCY
45h 20m
2 stops
Lufthansa Logo
09:15 - 21:16
LCY
-
GEG
20h 01m
2 stops
£519Lufthansa
Tue, 5 May - Fri, 15 May

Air Canada flights from Idaho to London

Our best Air Canada deals on Idaho to London flight tickets
Air Canada
8 Mar
GEG06:00Spokane
22h 20m
2 stops
LHR11:20London Heathrow
15 Mar
LHR13:25London Heathrow
39h 34m
2 stops
GEG21:59Spokane
£475
Air Canada
22 Apr
GEG07:10Spokane
17h 25m
2 stops
LHR08:35London Heathrow
8 May
LHR14:05London Heathrow
36h 31m
2 stops
GEG18:36Spokane
£481
Air Canada
25 Apr
GEG07:10Spokane
39h 20m
2 stops
LHR06:30London Heathrow
8 May
LHR14:05London Heathrow
36h 31m
2 stops
GEG18:36Spokane
£483

United Airlines flights from Idaho to London

Our best United Airlines deals on Idaho to London flight tickets
United Airlines
11 Mar
BOI10:49Boise Air Term. Gowen Fld
14h 36m
1 stop
LHR07:25London Heathrow
16 Mar
LHR06:50London Heathrow
22h 06m
2 stops
BOI22:56Boise Air Term. Gowen Fld
£462
United Airlines
11 Mar
BOI05:00Boise Air Term. Gowen Fld
18h 55m
2 stops
LHR05:55London Heathrow
16 Mar
LHR07:40London Heathrow
40h 06m
2 stops
BOI17:46Boise Air Term. Gowen Fld
£465
United Airlines
8 Mar
GEG06:00Spokane
18h 55m
1 stop
LHR07:55London Heathrow
15 Mar
LHR16:40London Heathrow
51h 01m
2 stops
GEG12:41Spokane
£470

momondo Fare Finder

 
Customise your flight search to find flights from Idaho to London 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 11 February 2026.
Use the filters below to find and compare flights from Idaho to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 11/3

10:49-07:25

1 stop14h 36m

London Heathrow

Mon 16/3

06:50-22:56

2 stops22h 06m

£462

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 11/3

05:00-05:55

2 stops18h 55m

London Heathrow

Mon 16/3

07:40-17:46

2 stops40h 06m

£465

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 15/4

14:37-17:40

2 stops20h 03m

London Heathrow

Wed 22/4

07:30-21:22

2 stops20h 52m

£473

LewistonLondon

LWS - LHR

LWSLHR

Lewiston Nez Perce Rgnl

Wed 29/4

06:09-15:35

1 stop25h 26m

London Heathrow

Wed 6/5

09:55-00:08

2 stops22h 13m

£473

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Sun 5/4

07:05-10:15

1 stop20h 10m

London Heathrow

Tue 21/4

06:30-16:14

2 stops16h 44m

£474

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 26/4

19:38-15:35

1 stop11h 57m

London Heathrow

Fri 15/5

08:40-21:13

2 stops20h 33m

£474

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 8/3

06:00-11:20

2 stops22h 20m

London Heathrow

Sun 15/3

13:25-21:59

2 stops39h 34m

£475

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 22/4

07:10-08:35

2 stops17h 25m

London Heathrow

Fri 8/5

14:05-18:36

2 stops36h 31m

£481

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 11/3

07:05-16:50

1 stop27h 45m

London Heathrow

Mon 16/3

14:30-22:04

1 stop13h 34m

£483

SpokaneLondon

GEG - LCY

GEGLCY

Spokane

Tue 5/5

12:35-17:55

2 stops45h 20m

London City

Fri 15/5

09:15-21:16

2 stops20h 01m

£519

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

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?

The cheapest month to fly to London from Idaho is in October. Flight prices, which tend to average around £510, are often lower during this time because this is during the off-season. The month of April is another great option to travel to London, with average flight prices from Idaho averaging around £521.

Cheap Idaho to London flight deals and tips

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

Fastest flight time

11h 51m

Direct flights

None
The fastest flight from Idaho to London takes 11h 51m
There are no direct flights from Idaho to London. There are no popular flight routes from Idaho to London.
Search flight deals

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

    Prices for flights from Idaho to London are updated daily.

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

    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.

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

    The travel and health documents required for your trip to London 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. 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
Slough
Maidstone
Southend-on-Sea
Canterbury
Ipswich
Ilford
Guildford
Chelmsford
Hayes
Wembley
Dover
Folkestone
Colchester
Bedford
Worthing
Ramsgate

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?

Yes. momondo enables you to select and highlight flights to London from Idaho with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Idaho to London.

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

Yes momondo offers price alerts on flights to London from Idaho. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London 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.
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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport